/*
 * 一閃 — 表示層のスタイル。
 *
 * コンセプトは「閉じた襖の合わせ目を、一太刀で斬り下ろす」。
 * 左右の rect が襖、その間の細い帯が合わせ目、polyline が刃筋である。
 * 配色は昼（座敷の和紙）と夜（行灯の闇）の2トークンセットを持ち、
 * prefers-color-scheme で入れ替える。個別の色は必ずトークン経由で参照する。
 */

/* ============================================================
   1. トークン
   ============================================================ */

:root {
  color-scheme: light dark;

  /* --- 面と線 --- */
  --ground: #efe7d7;
  --ground-deep: #e3d9c5;
  --panel: rgba(255, 252, 246, 0.72);
  --panel-solid: #f6f1e6;
  --line: rgba(41, 33, 24, 0.16);
  --line-strong: rgba(41, 33, 24, 0.32);

  /* --- 墨 --- */
  --ink: #241f19;
  --ink-soft: rgba(36, 31, 25, 0.68);
  --ink-faint: rgba(36, 31, 25, 0.72);

  /* --- 差し色 --- */
  --vermilion: #b3402c;
  --vermilion-soft: rgba(179, 64, 44, 0.14);
  --gold: #9a7a33;
  --gold-soft: rgba(154, 122, 51, 0.18);
  --matcha: #4a6b4f;

  /* --- 襖紙（SVG pattern）。段位別の地と抽象地紋 --- */
  --paper-pattern: url(#issen-paper-easy);
  --paper-base: #ece2cc;
  --paper-grain: rgba(84, 68, 46, 0.09);
  --paper-motif: rgba(92, 69, 40, 0.14);
  --paper-accent: rgba(154, 122, 51, 0.18);
  --wood: #8a5a30;

  /* --- 引手（掘り込み金具） --- */
  --pull-deep: #343a34;
  --pull-shallow: #202620;
  --pull-rim: #0b100e;
  --pull-gleam: rgba(193, 195, 178, 0.28);

  /* --- 襖の向こう側 --- */
  --beyond-1: #cfc3aa;
  --beyond-2: #b8a98d;
  --beyond-3: #8d7f66;

  /* --- 合わせ目から漏れる光 --- */
  --seam-1: #fff6dd;
  --seam-2: #ffeab5;
  --seam-3: #d8b46a;

  /* --- 框・引手 --- */
  --lacquer: #322a20;
  --lacquer-edge: #6d5b3c;

  /* --- 刃筋 --- */
  --blade-1: #ffffff;
  --blade-2: #7f97a5;
  --blade-glow: rgba(255, 255, 255, 0.85);

  /* --- 文字組み --- */
  --font-mincho: "Hiragino Mincho ProN", "HiraMinProN-W3", "Yu Mincho", "YuMincho", "Noto Serif JP", "Songti SC", serif;
  --font-gothic: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;

  /* --- 寸法 --- */
  --gutter: clamp(0.9rem, 4vw, 1.35rem);
  --radius: 3px;
  --tap: 44px;
  --hairline: 1px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #100d0a;
    --ground-deep: #070605;
    --panel: rgba(38, 31, 24, 0.66);
    --panel-solid: #191410;
    --line: rgba(226, 208, 172, 0.16);
    --line-strong: rgba(226, 208, 172, 0.34);

    --ink: #ece2cd;
    --ink-soft: rgba(236, 226, 205, 0.7);
    --ink-faint: rgba(236, 226, 205, 0.62);

    --vermilion: #d9563c;
    --vermilion-soft: rgba(217, 86, 60, 0.18);
    --gold: #c8a355;
    --gold-soft: rgba(200, 163, 85, 0.2);
    --matcha: #7fa585;

    /* 行灯の届く範囲だけが照る。紙は沈め、合わせ目の光を主役に残す */
    --paper-base: #7e7154;
    --paper-grain: rgba(20, 15, 8, 0.1);
    --paper-motif: rgba(245, 226, 181, 0.12);
    --paper-accent: rgba(200, 163, 85, 0.16);
    --wood: #5c3a1e;

    --beyond-1: #221b13;
    --beyond-2: #16110c;
    --beyond-3: #070605;

    --seam-1: #ffe7ae;
    --seam-2: #ffce6c;
    --seam-3: #a9691f;

    --lacquer: #191209;
    --lacquer-edge: #b08c47;

    --blade-1: #ffffff;
    --blade-2: #8fd3e6;
    --blade-glow: rgba(219, 246, 255, 0.9);
  }
}

/* ============================================================
   1.5. 段位別の襖紙
   ============================================================ */

/* 色は紙面だけへ与え、文字UIや判定線の共通トークンは変えない */
.app[data-difficulty="easy"] {
  --paper-pattern: url(#issen-paper-easy);
  --paper-base: #eee5d2;
  --paper-grain: rgba(76, 59, 37, 0.1);
  --paper-motif: rgba(103, 78, 44, 0.14);
  --paper-accent: rgba(154, 122, 51, 0.18);
}

.app[data-difficulty="intermediate"] {
  --paper-pattern: url(#issen-paper-intermediate);
  --paper-base: #526a83;
  --paper-grain: rgba(226, 229, 220, 0.13);
  --paper-motif: rgba(198, 216, 228, 0.18);
  --paper-accent: rgba(137, 180, 186, 0.23);
}

.app[data-difficulty="advanced"] {
  --paper-pattern: url(#issen-paper-advanced);
  --paper-base: #914239;
  --paper-grain: rgba(255, 224, 193, 0.13);
  --paper-motif: rgba(67, 20, 19, 0.18);
  --paper-accent: rgba(232, 139, 91, 0.23);
}

.app[data-difficulty="swordmaster"] {
  --paper-pattern: url(#issen-paper-swordmaster);
  --paper-base: #675079;
  --paper-grain: rgba(239, 225, 244, 0.13);
  --paper-motif: rgba(215, 190, 229, 0.18);
  --paper-accent: rgba(224, 153, 190, 0.22);
}

.app[data-difficulty="warrior"] {
  --paper-pattern: url(#issen-paper-warrior);
  --paper-base: #3f486c;
  --paper-grain: rgba(224, 227, 238, 0.11);
  --paper-motif: rgba(175, 185, 220, 0.18);
  --paper-accent: rgba(190, 158, 104, 0.24);
}

.app[data-difficulty="general"] {
  --paper-pattern: url(#issen-paper-general);
  --paper-base: #563353;
  --paper-grain: rgba(243, 218, 229, 0.12);
  --paper-motif: rgba(224, 157, 190, 0.19);
  --paper-accent: rgba(166, 191, 101, 0.25);
}

.app[data-difficulty="shura"] {
  --paper-pattern: url(#issen-paper-shura);
  --paper-base: #2c1a31;
  --paper-grain: rgba(255, 99, 112, 0.15);
  --paper-motif: rgba(204, 63, 89, 0.22);
  --paper-accent: rgba(137, 194, 88, 0.29);
}

.app[data-difficulty="onimusha"] {
  --paper-pattern: url(#issen-paper-onimusha);
  --paper-base: #1a1726;
  --paper-grain: rgba(107, 239, 132, 0.16);
  --paper-motif: rgba(174, 88, 141, 0.25);
  --paper-accent: rgba(129, 224, 104, 0.35);
}

@media (prefers-color-scheme: dark) {
  .app[data-difficulty="easy"] {
    --paper-base: #4e4739;
    --paper-grain: rgba(241, 221, 176, 0.1);
    --paper-motif: rgba(245, 226, 181, 0.13);
    --paper-accent: rgba(200, 163, 85, 0.16);
  }

  .app[data-difficulty="intermediate"] {
    --paper-base: #1e3045;
    --paper-grain: rgba(188, 211, 229, 0.13);
    --paper-motif: rgba(125, 165, 195, 0.18);
    --paper-accent: rgba(103, 194, 198, 0.22);
  }

  .app[data-difficulty="advanced"] {
    --paper-base: #4d211e;
    --paper-grain: rgba(255, 178, 140, 0.13);
    --paper-motif: rgba(224, 101, 82, 0.2);
    --paper-accent: rgba(241, 135, 81, 0.22);
  }

  .app[data-difficulty="swordmaster"] {
    --paper-base: #30203e;
    --paper-grain: rgba(219, 185, 233, 0.13);
    --paper-motif: rgba(173, 126, 201, 0.19);
    --paper-accent: rgba(224, 117, 170, 0.22);
  }

  .app[data-difficulty="warrior"] {
    --paper-base: #222642;
    --paper-grain: rgba(165, 177, 226, 0.12);
    --paper-motif: rgba(111, 133, 194, 0.19);
    --paper-accent: rgba(193, 158, 88, 0.22);
  }

  .app[data-difficulty="general"] {
    --paper-base: #321c35;
    --paper-grain: rgba(238, 152, 190, 0.13);
    --paper-motif: rgba(193, 93, 145, 0.2);
    --paper-accent: rgba(132, 194, 89, 0.24);
  }

  .app[data-difficulty="shura"] {
    --paper-base: #180d1e;
    --paper-grain: rgba(228, 62, 83, 0.15);
    --paper-motif: rgba(177, 36, 73, 0.24);
    --paper-accent: rgba(105, 186, 71, 0.28);
  }

  .app[data-difficulty="onimusha"] {
    --paper-base: #0d1117;
    --paper-grain: rgba(86, 213, 115, 0.17);
    --paper-motif: rgba(137, 62, 133, 0.25);
    --paper-accent: rgba(112, 214, 82, 0.34);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior-y: none;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  width: 100%;
  height: 100%;
  min-height: 100%;
  overflow: hidden;
  font-family: var(--font-mincho);
  color: var(--ink);
  background-color: var(--ground);
  /* 日本語は句読点を行頭へ送らず、未対応環境では自然な折り返しへ戻す */
  line-break: strict;
  word-break: normal;
  overflow-wrap: normal;
  /* 畳目に見立てた極薄の横縞と、上下からの陰り */
  background-image:
    linear-gradient(180deg, rgba(0, 0, 0, 0.16), transparent 22%, transparent 76%, rgba(0, 0, 0, 0.22)),
    repeating-linear-gradient(180deg, var(--line) 0 1px, transparent 1px 7px);
  background-attachment: fixed;
  overscroll-behavior-y: none;
}

/* Preactの描画先。箱を作らず、.app を body の直下と同じに並べる。 */
#root {
  display: contents;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   2. 全体レイアウト
   ============================================================ */

.app {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: clamp(0.55rem, 2.4vw, 0.9rem);
  width: min(100%, 30rem);
  /* 襖の面（1fr）は残りに収める。ここを min-height にすると
     aspect-ratio で伸びた面が画面を押し出し、抜刀が下へ隠れる */
  height: 100svh;
  margin-inline: auto;
  padding: calc(env(safe-area-inset-top) + 1.75rem) calc(env(safe-area-inset-right) + var(--gutter))
    calc(env(safe-area-inset-bottom) + 0.7rem) calc(env(safe-area-inset-left) + var(--gutter));
}

/* 版表示と戻る札に余白を確保し、遊戯中の上余白だけを詰めて面を広げる */
.app[data-screen="game"] {
  padding-top: calc(env(safe-area-inset-top) + 1.55rem);
}

/* --- 最初の遊び方選び。面を選ぶまで盤面への入力を覆う --- */
.mode-menu {
  position: absolute;
  z-index: 5;
  inset: 0;
  display: grid;
  /* safe を外すと、文字拡大や横画面で中身が溢れたとき上端がスクロールで出せなくなる */
  align-content: safe center;
  justify-items: center;
  gap: 0.8rem;
  padding: calc(env(safe-area-inset-top) + 2.4rem) calc(env(safe-area-inset-right) + var(--gutter))
    calc(env(safe-area-inset-bottom) + 1.25rem) calc(env(safe-area-inset-left) + var(--gutter));
  text-align: center;
  /* 障子の桟に見立てた縦の細線を、透けない地の上へ薄く重ねる。
     地を透かすと背後のHUDと盤面が幽霊のように残り、描画途中に見える */
  background:
    repeating-linear-gradient(90deg, transparent 0 22px, color-mix(in srgb, var(--line) 55%, transparent) 22px 23px),
    linear-gradient(180deg, var(--ground) 0%, var(--ground) 42%, var(--ground-deep) 100%);
  overflow-y: auto;
}

/* 生成ロゴの透明余白を含めて比率を固定し、読み込み中も入口をずらさない。 */
.title-logo {
  display: grid;
  place-items: center;
  width: min(78vw, 18rem);
  aspect-ratio: 16 / 9;
  margin: -0.35rem 0 -0.6rem;
  background: var(--panel);
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  line-height: 0;
}

.title-logo img {
  grid-area: 1 / 1;
  display: block;
  width: 100%;
  height: auto;
}

/* 配信失敗時もタイトルを失わない。通常は透明PNGの下に隠しておく。 */
.title-logo__fallback {
  display: none;
  grid-area: 1 / 1;
  color: var(--ink);
  font-family: var(--font-mincho);
  font-size: clamp(2rem, 15vw, 3.2rem);
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1;
}

.title-logo--fallback .title-logo__fallback {
  display: block;
}

.title-logo--fallback img {
  display: none;
}

/* 暗い面では透明PNGの黒い筆文字が沈むため、墨だけを明るく反転する。
   赤い斬撃は hue-rotate で元の色相へ戻し、生成ロゴの印象を保つ。 */
@media (prefers-color-scheme: dark) {
  .title-logo img {
    filter: invert(1) hue-rotate(180deg);
  }
}

/* --- 入口の手引き。図を左、三語を右に置き、縦に積まず高さを抑える --- */
.guide {
  display: grid;
  gap: 0.5rem;
  width: min(100%, 22rem);
  margin-top: 0.15rem;
  padding: 0.7rem 0.75rem 0.75rem;
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.guide__title {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--font-gothic);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  /* 中の説明は左揃え。見出しだけ中央に浮かせない */
  text-align: left;
}

.guide__body {
  display: grid;
  /* 図は固定幅、説明は残り全部。320pxでも折り返しを2行までに収める */
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: center;
}

/* --- 襖の縮図。鴨居と敷居の間を、合わせ目に沿って上から下へ --- */
.guide__figure {
  display: grid;
  justify-items: center;
  gap: 0.2rem;
}

.guide__mark {
  color: var(--ink-faint);
  font-family: var(--font-gothic);
  /* 10px台前半は端末では読み取りづらい。図の列(3.4rem)には二文字ぶんの余りがある */
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* 地は --panel-solid を使う。--paper-base は .app[data-difficulty] が段位ごとに
   塗り替えるため、選んだ段位次第で図が紺や漆黒になり朱の矢が読めなくなる */
.guide__fusuma {
  position: relative;
  width: 100%;
  height: 5.4rem;
  background: var(--panel-solid);
  border: var(--hairline) solid var(--line-strong);
  border-radius: 1px;
}

/* 鴨居と敷居の帯。太刀はこの二本の間を渡る。
   --lacquer は暗色時に地とほぼ同色になるため、明暗が入れ替わる墨を混ぜて使う。
   --line-strong では地との差が2.46しかなく、図の骨格が読み取れない */
.guide__fusuma::before,
.guide__fusuma::after {
  position: absolute;
  left: 0;
  right: 0;
  height: 0.55rem;
  background: color-mix(in srgb, var(--ink) 55%, transparent);
  content: "";
}

.guide__fusuma::before {
  top: 0;
}

.guide__fusuma::after {
  bottom: 0;
}

/* 閉じた二枚の合わせ目。鴨居と敷居の間だけを走らせ、帯の上へはみ出させない。
   太刀(2px)より太くして、朱の左右へ墨が覗くようにする。
   これで「合わせ目に沿って引く」ことが重なりだけで伝わる */
.guide__seam {
  position: absolute;
  top: 0.55rem;
  bottom: 0.55rem;
  left: 50%;
  width: 6px;
  margin-left: -3px;
  background: color-mix(in srgb, var(--ink) 55%, transparent);
}

/* 太刀の道筋。白刃は明るい襖紙の上で消えるため、朱で入れる。
   図に朱を差すのは朱書きの作法どおりで、和の語彙からも外れない */
.guide__stroke {
  position: absolute;
  top: 0.55rem;
  bottom: 0.95rem;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  color: var(--vermilion);
  background: currentColor;
}

/* 下端の矢じり。鴨居から敷居へ、向きが一目で分かるようにする */
.guide__stroke::after {
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateX(-50%) rotate(45deg);
  content: "";
}

/* --- 狙い・太刀・勝負の三語 --- */
.guide__points {
  display: grid;
  gap: 0.4rem;
  margin: 0;
  min-width: 0;
  text-align: left;
}

.guide__point {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  min-width: 0;
}

.guide__point dt {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.guide__point dd {
  margin: 0;
  min-width: 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.6;
}

.mode-menu__choices {
  display: grid;
  gap: 0.65rem;
  width: min(100%, 22rem);
  margin-top: 0.35rem;
}

.mode-choice {
  /* 面ごとの差し色。3pxの帯は素の金・朱、字と枠は墨を混ぜた深い色を使う。
     素の金・朱は小さな字にすると地とのコントラストが3前後で沈むためである */
  --choice-accent: var(--gold);
  --choice-ink: color-mix(in srgb, var(--gold) 52%, var(--ink));
  --choice-tint: var(--gold-soft);

  display: grid;
  /* 矢印は装飾で押す対象ではない。44pxを割り当てず、その分を名と説明へ回す */
  grid-template-columns: var(--tap) minmax(0, 1fr) 1.3rem;
  align-items: center;
  gap: 0.7rem;
  width: 100%;
  min-height: 4.5rem;
  padding: 0.6rem 0.75rem;
  color: var(--ink);
  background: var(--panel);
  border: var(--hairline) solid var(--line-strong);
  border-left: 3px solid var(--choice-accent);
  border-radius: var(--radius);
  font: inherit;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.16s ease;
}

/* 稽古はいつでも入れる主経路。地を締めて手前に置く */
.mode-choice--practice {
  background: var(--panel-solid);
}

/* 番付は名前登録と通信を挟む副経路。地を透かして桟を見せ、一段奥へ置く */
.mode-choice--ranking {
  --choice-accent: var(--vermilion);
  --choice-ink: color-mix(in srgb, var(--vermilion) 62%, var(--ink));
  --choice-tint: var(--vermilion-soft);
}

.mode-choice:active {
  transform: translateY(1px);
}

.mode-choice__mark {
  display: grid;
  place-items: center;
  width: var(--tap);
  height: var(--tap);
  color: var(--choice-ink);
  background: var(--choice-tint);
  border: var(--hairline) solid currentColor;
  /* 稽古は円相、番付は木札。字を読む前に二つの道を見分けられるようにする */
  border-radius: 50%;
  font-size: 1.2rem;
  line-height: 1;
}

.mode-choice--ranking .mode-choice__mark {
  border-radius: 4px;
}

.mode-choice__body {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}

.mode-choice__body strong {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.mode-choice__body small {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.mode-choice__arrow {
  display: grid;
  place-items: center;
  width: 1.3rem;
  height: var(--tap);
  color: var(--choice-ink);
  font-family: var(--font-gothic);
  font-size: 1.1rem;
}

.mode-menu__hint {
  margin: 0;
  max-width: 20rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink-faint);
}

/*
 * 利用者向けの日本語は、まず自然な折り返しを使う。
 * pretty / balance / auto-phrase は対応環境だけで読みやすさを加える。
 * recovery-code__value のような機械的な長い値だけは、下の個別指定で分断を許可する。
 */
:where(
  .guide__title,
  .guide__point dd,
  .mode-choice__body strong,
  .mode-choice__body small,
  .mode-menu__hint,
  .difficulty-choice__name,
  .ranking-difficulty-choice,
  .outcome-signal__text,
  .veil__lead,
  .veil__sub,
  .verdict__title,
  .verdict__body,
  .console__status,
  .competition__header h1,
  .competition__eyebrow,
  .competition__status,
  .online-card h2,
  .online-card h3,
  .profile-guidance,
  .recovery-code__note,
  .recovery-code__status,
  .recovery-reissue__note,
  .recovery-reissue__status,
  .challenge p,
  .challenge strong,
  .challenge small,
  .challenge span,
  .rank-head h3,
  .rank-mine,
  .pending-run p
) {
  line-break: strict;
  word-break: normal;
  overflow-wrap: normal;
  text-wrap: pretty;
}

@supports (word-break: auto-phrase) {
  :where(
    .guide__point dd,
    .mode-choice__body small,
    .mode-menu__hint,
    .outcome-signal__text,
    .veil__sub,
    .verdict__body,
    .console__status,
    .competition__status,
    .profile-guidance,
    .recovery-code__note,
    .recovery-code__status,
    .recovery-reissue__note,
    .recovery-reissue__status,
    .challenge small,
    .challenge span,
    .rank-mine,
    .pending-run p
  ) {
    word-break: auto-phrase;
  }
}

@supports (text-wrap: balance) {
  :where(
    .guide__title,
    .mode-choice__body strong,
    .difficulty-choice__name,
    .ranking-difficulty-choice,
    .verdict__title,
    .competition__header h1,
    .online-card h2,
    .online-card h3,
    .rank-head h3
  ) {
    text-wrap: balance;
  }
}

@media (hover: hover) {
  .mode-choice:not(:disabled):hover {
    background: var(--choice-tint);
    border-color: var(--choice-accent);
  }
}

@supports (height: 100dvh) {
  .app {
    height: 100dvh;
  }
}

/* ============================================================
   3. HUD
   ============================================================ */

.hud {
  display: grid;
  gap: 0.4rem;
}

.hud__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-width: 0;
}

.hud__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 遊戯中だけ左上に置く戻り道。番付の立合中は案内を出して遷移を止める */
.game-back {
  flex: 0 0 auto;
  min-width: var(--tap);
  min-height: var(--tap);
  padding-inline: 0.65rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-indent: 0.1em;
}

.app[data-screen="game"] .game-back {
  display: inline-flex;
}

.app-version {
  position: absolute;
  /* 遊び方選びの面（z-index: 5）より上。透けない地に隠されないようにする */
  z-index: 6;
  top: calc(env(safe-area-inset-top) + 0.35rem);
  left: calc(env(safe-area-inset-left) + 0.35rem);
  padding: 0.12rem 0.24rem;
  color: var(--ink-faint);
  background: var(--panel);
  border: var(--hairline) solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-gothic);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* --- 番付ボタン --- */

.online-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: var(--tap);
  padding: 0 0.85rem;
  font: inherit;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  white-space: nowrap;
  color: var(--ink);
  background: var(--panel);
  border: var(--hairline) solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.online-trigger span {
  color: var(--gold);
}

/* --- 残心 --- */

.lives {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0.6rem;
  min-height: var(--tap);
  border-left: var(--hairline) solid var(--line);
}

.lives__label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  white-space: nowrap;
  color: var(--ink-faint);
}

.lives__pips {
  display: inline-flex;
  gap: 0.28rem;
}

/* 残心は「鍔」に見立てた小さな輪。消費すると輪郭だけが残る */
.lives__pip {
  width: 0.6rem;
  height: 0.6rem;
  border: 1.5px solid var(--vermilion);
  border-radius: 50%;
  background: var(--vermilion);
  transition:
    background-color 0.3s ease,
    opacity 0.3s ease;
}

.lives[data-remaining="2"] .lives__pip:nth-child(3),
.lives[data-remaining="1"] .lives__pip:nth-child(n + 2),
.lives[data-remaining="0"] .lives__pip {
  background: transparent;
  opacity: 0.35;
}

/* --- 点・段・冴え --- */

.meters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--hairline);
  margin: 0;
  background: var(--line);
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.meter {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem;
  min-width: 0;
  padding: 0.28rem 0.5rem 0.32rem;
  background: var(--panel);
}

.meter__label {
  min-width: 0;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  white-space: nowrap;
}

.meter__value {
  margin: 0;
  min-width: 0;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  line-height: 1.1;
  white-space: nowrap;
}

.meter--score .meter__value {
  color: var(--gold);
}

.meter__sub {
  font-size: 0.72rem;
  color: var(--ink-faint);
}

/* --- 難易度選択。横スクロールでも各札は44px以上のタップ面を保つ --- */
.difficulty-nav {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  align-items: center;
  gap: 0.45rem;
}

.difficulty-nav__label {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  white-space: nowrap;
}

.difficulty-list {
  display: flex;
  min-width: 0;
  gap: 0.35rem;
  overflow-x: auto;
  padding: 0.05rem 0.05rem 0.2rem;
  scrollbar-width: thin;
}

.difficulty-choice {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  min-width: 4.8rem;
  min-height: var(--tap);
  padding: 0.35rem 0.5rem;
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--panel);
  font: inherit;
  text-align: center;
}

.difficulty-choice[aria-disabled="true"] {
  cursor: default;
  opacity: 0.52;
}

.difficulty-choice[data-state="locked"] {
  color: var(--ink-soft);
}

.difficulty-choice[data-state="selected"][aria-disabled="true"] {
  opacity: 0.86;
}

.difficulty-choice[data-state="selected"] {
  border-color: var(--vermilion);
  background: var(--vermilion-soft);
}

.difficulty-choice__name {
  font-size: 0.8rem;
}

.difficulty-choice__lock {
  display: inline-block;
  width: 0.78rem;
  height: 0.78rem;
  margin-inline-start: 0.24rem;
  vertical-align: -0.12em;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

/* ============================================================
   4. 襖の面
   ============================================================ */

.field {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 0;
  min-width: 0;
}

/*
 * 基本画面は SVG の viewBox に合わせた 3 / 5。
 * Sites版は preserveAspectRatio="none" と正規化入力で全幅表示する。
 */
.surface {
  position: relative;
  height: 100%;
  width: auto;
  min-height: 0;
  min-width: 0;
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: 3 / 5;
  border: 2px solid var(--lacquer);
  border-radius: 2px;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  /* 鴨居と敷居の落とす影 */
  box-shadow:
    0 0 0 1px var(--line),
    0 18px 42px rgba(0, 0, 0, 0.34);
}

/* 一閃の残光。斬り抜けた瞬間だけ面全体が白く飛ぶ */
.surface::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  z-index: 1;
  background: linear-gradient(105deg, transparent 38%, var(--blade-glow) 50%, transparent 62%);
}

.surface::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle at 50% 48%, var(--blade-glow), transparent 66%);
}

.app[data-outcome="pass"] .surface::after {
  animation: issen 0.5s ease-out;
}

.app[data-outcome="pass"] .surface::before {
  animation: success-light 0.46s ease-out;
}

.app[data-outcome="fail"] .surface::before {
  background: radial-gradient(circle at 50% 50%, var(--vermilion), transparent 70%);
  animation: failure-flash 0.42s ease-out;
}

@keyframes issen {
  0% {
    opacity: 0;
    transform: translateX(-24%);
  }
  30% {
    opacity: 0.9;
  }
  100% {
    opacity: 0;
    transform: translateX(24%);
  }
}

@keyframes success-light {
  0% {
    opacity: 0;
  }
  35% {
    opacity: 0.26;
  }
  100% {
    opacity: 0;
  }
}

@keyframes failure-flash {
  0% {
    opacity: 0;
  }
  20% {
    opacity: 0.48;
  }
  100% {
    opacity: 0;
  }
}

.rift {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 0;
}

/* 閉じた襖。合わせ目が現れるまでの静止画 */
.rift__closed {
  opacity: 0;
  transition: opacity 0.45s ease;
}

.app[data-phase="ready"] .rift__closed {
  opacity: 1;
}

.rift__closed > rect {
  fill: var(--paper-pattern);
}

.rift__closed-seam {
  stroke: var(--lacquer);
  stroke-width: 2;
  opacity: 0.8;
}

/* 一枚ごとの木枠 */
.rift__closed-frame rect {
  fill: none;
  stroke: var(--wood);
  stroke-width: 5;
}

/* 襖紙。地紋は低コントラストにして合わせ目と縁を優先する */
.paper-pattern__base {
  fill: var(--paper-base);
}

.paper-pattern__grain,
.paper-pattern__motif,
.paper-pattern__accent {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.paper-pattern__grain {
  stroke: var(--paper-grain);
  stroke-width: 0.8;
}

.paper-pattern__motif {
  stroke: var(--paper-motif);
  stroke-width: 1;
}

.paper-pattern__accent {
  stroke: var(--paper-accent);
  stroke-width: 1.1;
}

.paper-pattern__dot {
  fill: var(--paper-accent);
  opacity: 0.7;
}

/* 引手。形は defs 側の #issen-pull、色はここで与える */
.pull__well {
  fill: url(#issen-pull-well);
}

/* 座金の覆輪 */
.pull__rim {
  fill: none;
  stroke: var(--pull-rim);
  stroke-width: 0.8;
}

/* 庇の下端で折り返す明り */
.pull__gleam {
  fill: none;
  stroke: var(--pull-gleam);
  stroke-width: 1.1;
  stroke-linecap: round;
}

/* 鴨居・敷居 */
.rift__band {
  fill: var(--lacquer);
  opacity: 0.94;
}

.rift__gateline {
  stroke-width: 1.5;
  stroke: var(--lacquer-edge);
  opacity: 0.75;
}

.rift__gateline--entry {
  stroke-dasharray: 8 5;
}

.rift__gateline--goal {
  stroke: var(--gold);
  opacity: 0.9;
}

/* 襖そのもの。触れた時点で失敗になる面 */
.rift__hazard {
  fill: var(--paper-pattern);
  transition: opacity 0.25s ease;
}

/* 合わせ目 */
.rift__corridor {
  fill: url(#issen-corridor);
}

.rift__axis {
  fill: none;
  stroke: var(--seam-1);
  stroke-width: 0.75;
  stroke-dasharray: 3 9;
  opacity: 0.42;
}

/* 襖の縁。木枠の見えであり、刃が触れてはいけない境界でもある */
.rift__edge {
  fill: none;
  stroke: var(--wood);
  stroke-width: 4;
  opacity: 0.95;
  transition:
    stroke 0.25s ease,
    opacity 0.25s ease;
}

/* --- 刃筋 --- */

.rift__trail {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.rift__trail--halo {
  stroke: var(--blade-glow);
  stroke-width: 11;
  opacity: 0.3;
  filter: blur(3px);
}

.rift__trail--core {
  stroke: url(#issen-trail);
  stroke-width: 2.6;
}

/* 切先 */
.rift__head {
  fill: var(--blade-1);
  opacity: 0;
  transition: opacity 0.15s ease;
}

.app[data-drawing="true"] .rift__head {
  opacity: 1;
  filter: drop-shadow(0 0 7px var(--blade-glow));
}

.app[data-outcome="fail"] .rift__trail--core {
  stroke: var(--vermilion);
}

.app[data-outcome="fail"] .rift__trail--halo {
  stroke: var(--vermilion);
  opacity: 0.45;
}

.app[data-outcome="fail"] .rift__edge {
  stroke: var(--vermilion);
  opacity: 1;
}

.app[data-outcome="pass"] .rift__edge {
  stroke: var(--gold);
  opacity: 1;
}

/* 色を見分けにくい場合も、札の文字と輪郭で判定を読めるようにする */
.outcome-signal {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.7rem;
  /* 320px幅では札の印を残しても本文へ十分な幅を渡す */
  width: min(92%, 17rem);
  min-height: 4rem;
  padding: 0.7rem 0.85rem;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel-solid) 94%, transparent);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: 0 7px 20px rgba(0, 0, 0, 0.24);
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.outcome-signal[data-tone="pass"] {
  border-color: var(--gold);
}

.outcome-signal[data-tone="fail"] {
  border-color: var(--vermilion);
}

.outcome-signal[data-tone="warn"] {
  border-style: dashed;
}

.app[data-phase="complete"] .outcome-signal,
.app[data-phase="failed"] .outcome-signal {
  display: none;
}

.app[data-outcome="pass"] .outcome-signal {
  animation: outcome-pass 0.42s ease-out;
}

.app[data-outcome="fail"] .outcome-signal {
  animation: outcome-fail 0.52s cubic-bezier(0.2, 0.85, 0.35, 1);
}

.outcome-signal__mark {
  display: grid;
  place-items: center;
  width: 2.45rem;
  height: 2.45rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 1.45rem;
  line-height: 1;
}

.outcome-signal[data-tone="pass"] .outcome-signal__mark {
  color: var(--gold);
}

.outcome-signal[data-tone="fail"] .outcome-signal__mark {
  color: var(--vermilion);
  border-radius: 2px;
  transform: rotate(-8deg);
}

.outcome-signal__text {
  min-width: 0;
  font-size: clamp(0.85rem, 3.8vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

@keyframes outcome-pass {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.78);
  }
  60% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.04);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes outcome-fail {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.76) rotate(-3deg);
  }
  18% {
    opacity: 1;
    transform: translate(calc(-50% + 7px), -50%) scale(1.08) rotate(2deg);
  }
  34% {
    transform: translate(calc(-50% - 6px), -50%) scale(1.02) rotate(-2deg);
  }
  50% {
    transform: translate(calc(-50% + 4px), -50%) scale(1) rotate(1deg);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(0);
  }
}

/* 待機中に上から降りてくる薄明かり */
.rift__scan {
  fill: var(--seam-2);
  opacity: 0;
}

.app[data-phase="ready"] .rift__scan {
  animation: fall 3.6s linear infinite;
}

@keyframes fall {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  22% {
    opacity: 0.12;
  }
  100% {
    transform: translateY(482px);
    opacity: 0;
  }
}

/* --- 面上の小さな注記 --- */

.surface__tag {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-gothic);
  font-size: 0.6rem;
  letter-spacing: 0.32em;
  text-indent: 0.32em;
  /* 暗い框の上に置くので、両テーマとも明るい側へ寄せる */
  color: color-mix(in srgb, var(--gold) 55%, #f3ead8);
  pointer-events: none;
}

.surface__tag--entry {
  top: calc(12% - 0.95rem);
}

.surface__tag--goal {
  top: calc(88% + 0.35rem);
}

.surface__signal,
.surface__depth-readout {
  position: absolute;
  bottom: 0.5rem;
  font-family: var(--font-gothic);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  pointer-events: none;
}

.surface__signal {
  left: 0.55rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.surface__signal > i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--vermilion);
}

.surface__depth-readout {
  right: 0.55rem;
}

.app[data-phase="ready"] .surface__tag {
  opacity: 0.4;
}

/* --- 導入の覆い --- */

.veil {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: end;
  justify-content: center;
  justify-items: center;
  gap: 0.5rem;
  /* 引手が並ぶ中央を避けて、文は下寄せにする */
  padding: 1.5rem clamp(1rem, 6vw, 1.5rem) 24%;
  text-align: center;
  /* 上は素通しで閉じた襖を見せ、下は敷居の手前で引く */
  background: linear-gradient(
    180deg,
    transparent 0%,
    transparent 55%,
    color-mix(in srgb, var(--ground-deep) 88%, transparent) 64%,
    color-mix(in srgb, var(--ground-deep) 88%, transparent) 78%,
    transparent 87%
  );
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease;
}

.veil[data-open="false"] {
  opacity: 0;
  visibility: hidden;
}

.veil__lead,
.veil__sub,
.verdict__body {
  max-inline-size: 19rem;
}

.veil__lead {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  text-shadow:
    0 0 10px var(--ground-deep),
    0 0 4px var(--ground-deep);
}

/* 320px幅でも助詞を行頭へ送らず、意味句単位で自然に分ける */
@media (min-width: 20rem) {
  .veil__lead-phrase {
    white-space: nowrap;
  }
}

.veil__sub {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--ink-soft);
  text-shadow:
    0 0 10px var(--ground-deep),
    0 0 4px var(--ground-deep);
}

/* --- 結果 --- */

.verdict {
  position: absolute;
  z-index: 4;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.45rem;
  padding: 1.6rem;
  text-align: center;
  background: color-mix(in srgb, var(--ground-deep) 88%, transparent);
  animation: rise 0.3s ease-out;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

.verdict__eyebrow {
  margin: 0;
  font-family: var(--font-gothic);
  font-size: 0.62rem;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: var(--ink-faint);
}

.verdict__title {
  margin: 0;
  max-inline-size: 20ch;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.app[data-result="clear"] .verdict__title {
  color: var(--gold);
}

.app[data-result="over"] .verdict__title {
  color: var(--vermilion);
}

.verdict__body {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.verdict__score {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin: 0.3rem 0 0.6rem;
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.verdict__unit {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

/* ============================================================
   5. 下段の操作
   ============================================================ */

.console {
  display: grid;
  gap: 0.55rem;
}

.console__status {
  margin: 0;
  min-height: 2.6em;
  padding: 0.4rem 0.65rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink-soft);
  border-left: 2px solid var(--line-strong);
  background: var(--panel);
}

.console__status[data-tone="good"] {
  color: var(--ink);
  border-left-color: var(--gold);
}

.console__status[data-tone="bad"] {
  color: var(--ink);
  border-left-color: var(--vermilion);
}

.console__status[data-tone="warn"] {
  border-left-color: var(--matcha);
}

.console__hint {
  margin: 0;
  font-size: 0.7rem;
  color: var(--ink-faint);
}

/* ============================================================
   6. ボタンと入力
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: var(--tap);
  min-width: var(--tap);
  padding: 0 1.1rem;
  font: inherit;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  color: var(--panel-solid);
  background: var(--ink);
  border: var(--hairline) solid var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    transform 0.12s ease,
    opacity 0.2s ease,
    background-color 0.2s ease;
}

.btn--wide {
  width: 100%;
}

/* .btn の共通 display より優先し、戻り道は遊戯中だけ見せる */
.app:not([data-screen="game"]) .game-back {
  display: none;
}

/* native disabled は使わず、立合中も押下時の案内を読み上げる */
.game-back[aria-disabled="true"] {
  cursor: default;
  opacity: 0.75;
}

/* 朱の刀身に見立てた主ボタン */
.btn--primary {
  color: #fbf6ea;
  background: var(--vermilion);
  border-color: var(--vermilion);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn--primary[data-variant="danger"] {
  background: var(--lacquer);
  border-color: var(--vermilion);
  color: var(--vermilion);
}

/* 入力待ち。押せないことを示しつつ文言は読める濃さに保つ */
.btn--primary[data-variant="quiet"] {
  background: var(--panel);
  border-style: dashed;
  border-color: var(--line-strong);
  color: var(--ink-soft);
  box-shadow: none;
}

.btn--secondary {
  color: var(--ink);
  background: var(--panel);
  border-color: var(--line-strong);
}

:focus {
  outline: none;
}

.btn:disabled {
  cursor: default;
  opacity: 0.75;
}

.btn:not(:disabled):active {
  transform: translateY(1px);
}

/* aria-disabled の戻る札は押せる経路を残しつつ、無効相当の見た目を保つ */
.btn.game-back[aria-disabled="true"]:hover,
.btn.game-back[aria-disabled="true"]:active {
  cursor: default;
  opacity: 0.75;
  transform: none;
}

.text-btn {
  min-height: var(--tap);
  padding: 0 0.6rem;
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  background: none;
  border: 0;
  border-bottom: var(--hairline) solid transparent;
  cursor: pointer;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: var(--tap);
  height: var(--tap);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--ink-soft);
  background: none;
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

@media (hover: hover) {
  .btn:not(:disabled):hover {
    opacity: 0.88;
  }

  .text-btn:hover {
    border-bottom-color: var(--gold);
  }
}

/* ============================================================
   7. 番付専用画面
   ============================================================ */

/* 番付は同じapp階層に置く通常画面。暗い重なりを使わず、
   画面全体を縦に読めるようにする。 */
.competition {
  display: none;
  width: 100%;
  min-width: 0;
  color: var(--ink);
}

.app[data-screen="ranking"] {
  display: block;
  height: 100svh;
  padding-inline: calc(env(safe-area-inset-left) + var(--gutter)) calc(env(safe-area-inset-right) + var(--gutter));
  /* 上端の安全域と戻る札のための余白を取り、番付の題字を隠さない */
  padding-top: calc(env(safe-area-inset-top) + 4rem);
  padding-bottom: calc(env(safe-area-inset-bottom) + 1rem);
  overflow-y: auto;
  overscroll-behavior-y: contain;
  scroll-padding-block: 1rem;
}

.app[data-screen="ranking"] .app-version {
  display: none;
}

.app[data-screen="ranking"] > .hud,
.app[data-screen="ranking"] > .field,
.app[data-screen="ranking"] > .console {
  display: none;
}

.app[data-screen="ranking"] .competition {
  display: grid;
  gap: 0.9rem;
  width: min(100%, 30rem);
  margin-inline: auto;
}

@supports (height: 100dvh) {
  .app[data-screen="ranking"] {
    height: 100dvh;
  }
}

.competition__header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  padding-bottom: 0.7rem;
  border-bottom: var(--hairline) solid var(--line);
}

.competition__header > div {
  min-width: 0;
}

.competition__back {
  align-self: start;
  min-width: var(--tap);
  min-height: var(--tap);
  padding-inline: 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-indent: 0.1em;
}

.competition__header h1 {
  margin: 0.15rem 0 0;
  max-inline-size: 100%;
  font-size: clamp(1.35rem, 6vw, 1.7rem);
  font-weight: 600;
  letter-spacing: 0.14em;
}

.competition__eyebrow {
  margin: 0;
  font-family: var(--font-gothic);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.competition__status {
  margin: 0;
  padding: 0.5rem 0.7rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink-soft);
  background: var(--vermilion-soft);
  border-left: 2px solid var(--line-strong);
}

.competition__status[data-tone="good"] {
  border-left-color: var(--gold);
}
.competition__status[data-tone="bad"] {
  border-left-color: var(--vermilion);
}
.competition__status[data-tone="warn"] {
  border-left-color: var(--matcha);
}

.competition__content {
  display: grid;
  gap: 0.9rem;
  min-width: 0;
}

.ranking-difficulty-nav {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
  padding-bottom: 0.55rem;
  border-bottom: var(--hairline) solid var(--line);
}

.ranking-difficulty-nav__label {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
}

.ranking-difficulty-list {
  display: flex;
  gap: 0.35rem;
  min-width: 0;
  overflow-x: auto;
  padding: 0.05rem 0.05rem 0.2rem;
  scrollbar-width: thin;
}

.ranking-difficulty-choice {
  flex: 0 0 auto;
  min-width: 4.2rem;
  min-height: var(--tap);
  padding: 0 0.6rem;
  color: var(--ink-soft);
  background: var(--panel-solid);
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.76rem;
  cursor: pointer;
}

.ranking-difficulty-choice[aria-pressed="true"] {
  color: var(--ink);
  border-color: var(--vermilion);
  background: var(--vermilion-soft);
}

.online-card {
  display: grid;
  gap: 0.7rem;
  min-width: 0;
  padding: 0.85rem;
  background: var(--panel);
  border: var(--hairline) solid var(--line);
  border-radius: var(--radius);
}

.online-card--challenge {
  border-inline-start: 2px solid var(--vermilion);
}

.online-card__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  min-width: 0;
}

.online-card__heading > div {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-width: 0;
}

.online-card__heading span {
  font-size: 0.8rem;
  color: var(--gold);
}

.online-card h2,
.online-card h3 {
  margin: 0;
  max-inline-size: 100%;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.online-badge {
  padding: 0.2rem 0.55rem;
  font-family: var(--font-gothic);
  font-size: 0.7rem;
  color: var(--ink-soft);
  border: var(--hairline) solid var(--line-strong);
  border-radius: var(--radius);
}

.online-form {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
}

.online-form label {
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.profile-guidance {
  min-height: 2.6em;
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.profile-guidance[data-state="required"] {
  color: var(--vermilion);
}

.profile-guidance[data-state="ready"] {
  color: var(--matcha);
}

.online-form__row {
  display: flex;
  gap: 0.5rem;
  min-width: 0;
}

.recovery-code {
  display: grid;
  gap: 0.45rem;
  padding-top: 0.7rem;
  border-top: var(--hairline) solid var(--line);
}

.recovery-reissue {
  display: grid;
  gap: 0.3rem;
  padding-top: 0.7rem;
  border-top: var(--hairline) solid var(--line);
}

.recovery-reissue .text-btn {
  justify-self: start;
}

.recovery-code__note,
.recovery-code__status,
.recovery-reissue__note,
.recovery-reissue__status {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.recovery-code__row,
.recovery-form__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.recovery-code__value {
  min-width: 0;
  padding: 0.55rem 0.65rem;
  overflow-wrap: anywhere;
  font-family: var(--font-gothic);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--panel-solid);
  border: var(--hairline) solid var(--line-strong);
  border-radius: var(--radius);
}

.recovery-form {
  padding-top: 0.7rem;
  border-top: var(--hairline) solid var(--line);
}

.recovery-details {
  min-width: 0;
  border-top: var(--hairline) solid var(--line);
}

.recovery-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: var(--tap);
  padding-block: 0.25rem;
  color: var(--ink-soft);
  font-family: var(--font-gothic);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  list-style: none;
}

.recovery-details summary::-webkit-details-marker {
  display: none;
}

.recovery-details summary::after {
  content: "+";
  color: var(--gold);
  font-size: 1.1rem;
  line-height: 1;
}

.recovery-details[open] summary::after {
  content: "−";
}

.recovery-details__content {
  display: grid;
  gap: 0.7rem;
  min-width: 0;
  padding-bottom: 0.2rem;
}

.competition input {
  flex: 1;
  min-width: 0;
  min-height: var(--tap);
  scroll-margin-block: 1rem;
  padding: 0 0.7rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--panel-solid);
  border: var(--hairline) solid var(--line-strong);
  border-radius: var(--radius);
}

.turnstile-slot {
  display: block;
  inline-size: 100%;
  min-width: 0;
  max-width: 100%;
  overflow: visible;
  contain: inline-size;
}

.turnstile-slot iframe {
  display: block;
}

.turnstile-slot:empty {
  display: none;
}

.form-error {
  margin: 0;
  font-size: 0.75rem;
  color: var(--vermilion);
}

.form-error:empty {
  display: none;
}

/* --- 御前試合 --- */

.challenge-grid {
  display: grid;
  gap: 0.5rem;
}

.challenge {
  display: grid;
  gap: 0.2rem;
  padding: 0.6rem 0.7rem;
  background: var(--panel-solid);
  border: var(--hairline) solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
}

.challenge p {
  margin: 0;
  font-family: var(--font-gothic);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.challenge strong {
  font-size: 0.95rem;
  font-weight: 600;
}

.challenge span {
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--ink-faint);
}

.challenge small {
  line-height: 1.5;
}

.challenge__actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.3rem;
}

.rank-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  border-top: var(--hairline) solid var(--line);
  padding-top: 0.5rem;
}

.rank-head h3 {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
}

.rank-mine {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--gold);
}

.ranking {
  display: grid;
  gap: 0.15rem;
  max-height: 13rem;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  list-style: none;
}

.ranking li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  font-size: 0.8rem;
  border-bottom: var(--hairline) solid var(--line);
}

.ranking li > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ranking li > strong {
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.ranking__empty {
  justify-content: center;
  color: var(--ink-faint);
}

.pending-run {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  background: var(--vermilion-soft);
  border-left: 2px solid var(--vermilion);
  border-radius: var(--radius);
}

.pending-run p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.5;
}

/* ============================================================
   8. 画面条件による調整
   ============================================================ */

/* 縦に余裕のない端末では HUD を詰めて、襖の面を優先する */
@media (max-height: 700px) {
  .app {
    gap: 0.45rem;
  }

  .surface__signal,
  .surface__depth-readout {
    display: none;
  }

  .meter {
    padding: 0.24rem 0.45rem 0.28rem;
  }

  .meter__value {
    font-size: 0.95rem;
  }

  .console__status {
    min-height: 2.2em;
    font-size: 0.75rem;
  }
}

@media (max-width: 420px) {
  .online-trigger {
    padding-inline: 0.6rem;
  }
}

@media (max-width: 340px) {
  .app[data-screen="ranking"] {
    padding-inline: env(safe-area-inset-left) env(safe-area-inset-right);
  }

  .app[data-screen="ranking"] .online-card {
    padding-inline: 0.25rem;
  }

  .app[data-screen="ranking"] .turnstile-slot {
    width: 300px;
    inline-size: 300px;
    min-width: 300px;
    max-width: 300px;
  }

  .online-card {
    padding-inline: 0.5rem;
  }

  .lives__label {
    display: none;
  }

  .lives {
    padding-inline: 0.35rem;
  }

  .online-trigger {
    padding-inline: 0.45rem;
    letter-spacing: 0.1em;
  }
}

/* 横画面は主経路ではないが、面と操作を左右に分けて使える形にする */
@media (orientation: landscape) and (max-height: 560px) {
  .app {
    grid-template-rows: auto minmax(0, 1fr);
    grid-template-columns: minmax(0, 1fr) minmax(0, 15rem);
    grid-template-areas:
      "field hud"
      "field console";
    width: min(100%, 48rem);
    align-items: start;
  }

  .hud {
    grid-area: hud;
  }
  .field {
    grid-area: field;
  }
  .console {
    grid-area: console;
    align-self: end;
  }

  .surface {
    max-height: calc(100dvh - 1.6rem);
    width: auto;
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  /* 判定札と静的な光は残し、大きな移動・揺れだけを止める */
  .app[data-outcome] .outcome-signal {
    animation: none !important;
    opacity: 1;
    transform: translate(-50%, -50%);
  }

  .app[data-outcome="pass"] .surface::before,
  .app[data-outcome="fail"] .surface::before {
    animation: none !important;
    opacity: 0.18;
  }
}

@media (prefers-contrast: more) {
  :root {
    --line: rgba(41, 33, 24, 0.4);
    --line-strong: rgba(41, 33, 24, 0.65);
    --ink-soft: var(--ink);
    --ink-faint: rgba(36, 31, 25, 0.85);
  }
}

/* 結果共有。外部サービスのスクリプトを読み込まず、操作時だけ共有する。 */
.result-share {
  width: 100%;
  max-width: 26rem;
  margin: 0.4rem 0 0.8rem;
}
.result-share__native {
  width: 100%;
  margin-bottom: 0.55rem;
}
.result-share__links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}
.result-share button,
.result-share a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: normal;
  color: inherit;
}
.result-share [hidden] {
  display: none;
}
.result-share__status {
  margin: 0.45rem 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
}
.result-share__status:empty {
  display: none;
}
.result-share textarea {
  width: 100%;
  margin-top: 0.5rem;
  font: inherit;
  font-size: 0.8rem;
}
.verdict {
  overflow-y: auto;
  place-content: start center;
  padding: 1rem;
}
/* Sites 向けの余白と横画面。番付画面は持たない。 */
html:not([data-sites-ready]) .app,
.app[data-paused="true"] {
  pointer-events: none;
}

.app[data-paused="true"] *,
.app[data-paused="true"]::before,
.app[data-paused="true"]::after {
  animation-play-state: paused !important;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  display: grid;
  place-items: center;
  background: var(--ground);
}

.app {
  width: min(100vw, 30rem);
  height: 100dvh;
  max-height: 100dvh;
}

.hud__bar {
  display: grid;
  grid-template-columns: minmax(max-content, 1fr) minmax(0, auto) minmax(max-content, 1fr);
  gap: 0.4rem;
}
.hud__bar .game-back {
  justify-self: start;
}
.hud__actions {
  justify-self: end;
}
.current-difficulty {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  overflow-wrap: anywhere;
}
.outcome-signal {
  grid-template-columns: 1fr;
  text-align: center;
}
.outcome-signal[data-tone="pass"] {
  grid-template-columns: auto minmax(0, 1fr);
}
.outcome-signal:not([data-tone="pass"]) .outcome-signal__mark {
  display: none;
}
.outcome-signal__text {
  font-size: 1.35rem;
}
.verdict {
  place-content: center;
}
.btn[data-variant="danger"] {
  color: #fff7e6;
  background: var(--vermilion);
}

.mode-menu__best {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.mode-menu__best strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.mode-menu__error {
  margin: 0.6rem 0 0;
  color: var(--bad, #8a1f1f);
  font-weight: 700;
}

.mode-menu #boot-retry {
  margin-top: 0.55rem;
}

.mode-menu {
  align-content: start;
  gap: clamp(1rem, 2.2dvh, 1.5rem);
  padding-top: calc(env(safe-area-inset-top) + 1.25rem);
  padding-bottom: calc(env(safe-area-inset-bottom) + 1.25rem);
}

.mode-menu .title-logo {
  width: min(62vw, 14rem);
  margin: 0;
}
.mode-menu .guide {
  width: 100%;
  margin: 0;
  padding: 1rem;
}
.mode-menu .guide__title {
  font-size: 0.85rem;
}
.mode-menu .guide__points {
  gap: 0.65rem;
}
.mode-menu .guide__point dt,
.mode-menu .guide__point dd {
  font-size: 0.9rem;
}
.mode-menu .difficulty-nav {
  width: 100%;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
}
.mode-menu .difficulty-nav__label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-align: left;
}
.mode-menu .difficulty-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  overflow: visible;
}
.mode-menu .difficulty-choice {
  min-width: 0;
  min-height: 3.25rem;
}
.mode-menu .difficulty-choice__name {
  font-size: 0.95rem;
  overflow-wrap: anywhere;
}
.mode-menu .mode-menu__choices {
  width: 100%;
  margin: 0;
}
.mode-menu .mode-choice--practice {
  background: var(--panel);
}
.mode-menu .mode-menu__hint {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
}

@media (orientation: landscape) {
  .mode-menu {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1.5rem;
    align-items: start;
  }
  .mode-menu .title-logo {
    grid-column: 1;
    grid-row: 1;
  }
  .mode-menu .guide {
    grid-column: 1;
    grid-row: 2 / 5;
  }
  .mode-menu .difficulty-nav {
    grid-column: 2;
    grid-row: 1 / 3;
  }
  .mode-menu .mode-menu__choices {
    grid-column: 2;
  }
  .mode-menu .mode-menu__best,
  .mode-menu .mode-menu__hint {
    grid-column: 2;
  }
}

@media (orientation: landscape) {
  .app {
    width: min(100vw, 48rem);
  }
}

@media (orientation: landscape) and (max-height: 560px) {
  .surface {
    max-height: calc(100dvh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 2.4rem);
  }
}

@media (orientation: landscape) and (min-width: 700px) and (max-height: 560px) {
  .app[data-screen="game"] {
    grid-template-columns: minmax(0, 1fr) minmax(0, 20rem);
  }
}

/* 説明が読み上げ専用になっても操作欄の高さとボタンの行を保つ。 */
.console {
  grid-template-rows: 3.5rem var(--tap);
}
.console__status {
  grid-row: 1;
  min-height: 0;
  overflow: auto;
}
.console > #action {
  grid-row: 2;
}

/* PCも視線とマウスが中央の襖から外れない、一続きの操作面にする。 */
@media (min-width: 960px) and (min-height: 561px) {
  .app {
    width: min(calc(100vw - 3rem), 38rem);
    height: min(calc(100dvh - 2rem), 50rem);
    padding: 1rem 1.5rem;
  }
  .mode-menu {
    grid-template-columns: minmax(0, 1fr);
    align-content: safe center;
    gap: 0.8rem;
    padding: 1.5rem 3rem;
    border: 1px solid var(--line);
    border-radius: 0.75rem;
  }
  .mode-menu > * {
    grid-column: 1 !important;
    grid-row: auto !important;
  }
  .mode-menu .title-logo {
    width: 13rem;
  }
  .mode-menu .guide {
    padding: 0.8rem 1rem;
  }
  .mode-menu .guide__points {
    gap: 0.4rem;
  }
  .mode-menu .difficulty-nav {
    gap: 0.4rem;
  }
  .mode-menu .mode-choice--practice {
    min-height: 4rem;
    background: var(--vermilion);
    color: #fff7e6;
    border-color: var(--vermilion);
  }
  .mode-choice--practice .mode-choice__mark,
  .mode-choice--practice .mode-choice__arrow {
    color: inherit;
    border-color: currentColor;
  }
  .mode-menu .mode-menu__hint {
    font-size: 0.8rem;
  }
  .app[data-screen="game"] {
    width: min(calc(100vw - 3rem), 32rem);
    height: min(calc(100dvh - 2rem), 56rem);
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    grid-template-areas: "hud" "field" "console";
    gap: 0.75rem;
    padding-top: 1rem;
  }
  .app[data-screen="game"] .field {
    grid-area: field;
    height: 100%;
  }
  .app[data-screen="game"] .hud {
    grid-area: hud;
  }
  .app[data-screen="game"] .console {
    grid-area: console;
  }
}

/* マウス操作時は増やさず、キーボード操作時だけ位置を示す。 */
.app button:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 4px;
}
/* 承認済みゲーム画面。Sitesだけに読み込み、判定座標は変更しない。 */
:root {
  --room-paper: #eee4cc;
  --room-wood: #30241a;
  --room-gold: #d8b566;
  --room-red: #b8382d;
  --room-shadow: #21160f45;
  --room-text: #24211b;
  --room-muted: #605849;
  --room-wash: #fbf5e9;
  /* 墨絵の上に重ねる紙色・地紋の不透明度。全難易度・明暗テーマで統一する。 */
  --room-photo-opacity: 0.3;
}
body {
  background: var(--ground);
}
#app {
  isolation: isolate;
  gap: 0;
  padding: 0;
  background: var(--ground);
  box-shadow: 0 12px 60px var(--room-shadow);
}
#app[data-screen="game"] {
  width: min(100vw, 32rem);
  height: 100dvh;
  max-height: 100dvh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr) 6.8rem;
  grid-template-areas: "hud" "field" "console";
  gap: 0;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
#app .hud {
  grid-area: hud;
  display: grid;
  gap: 0.6rem;
  padding: 0.7rem 1rem 0.65rem;
  color: var(--room-text);
  background: var(--room-paper);
  background-image:
    radial-gradient(ellipse at 30% 0%, #fff9e488, transparent 65%), repeating-linear-gradient(112deg, #6d553207 0 1px, transparent 1px 4px);
  border: 0;
}
#app .hud__bar {
  display: grid;
  grid-template-columns: minmax(44px, 1fr) minmax(0, 1.5fr) minmax(76px, 1fr);
  align-items: center;
  gap: 0.35rem;
}
#app .game-back {
  display: inline-flex;
  justify-self: start;
  min-height: 44px;
  min-width: 44px;
  padding: 0 0.65rem;
  color: var(--room-wash);
  background: var(--room-text);
  border: 1px solid #e1cf9966;
  border-radius: 50%;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-indent: 0;
  box-shadow: 0 0 0 2px #24211b18;
}
#app .current-difficulty {
  position: relative;
  margin: 0;
  padding: 0.45rem 0.7rem;
  color: #fff8e9;
  background: #282620;
  font-size: clamp(0.85rem, 4.7vw, 1.3rem);
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  overflow-wrap: anywhere;
  /* 墨帯の縁。文字やフォーカス対象にはclipを掛けない。 */
  border-radius: 48% 4% 46% 3% / 7% 94% 8% 90%;
  box-shadow:
    0 3px 0 #28262020,
    0 -2px 0 #28262020;
}
#app .hud__actions {
  justify-self: end;
}
#app .lives {
  display: grid;
  justify-items: center;
  gap: 0.25rem;
  padding: 0;
  border: 0;
}
#app .lives__label {
  color: var(--room-text);
  font-size: 0.74rem;
}
#app .lives__pips {
  gap: 0.28rem;
}
#app .lives__pip {
  width: 0.83rem;
  height: 0.83rem;
  background: var(--room-red);
  border-color: var(--room-red);
}
#app .lives[data-remaining="2"] .lives__pip:nth-child(3),
#app .lives[data-remaining="1"] .lives__pip:nth-child(n + 2),
#app .lives[data-remaining="0"] .lives__pip {
  background: transparent;
  opacity: 0.4;
}
#app .meters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding-top: 0.45rem;
  background: transparent;
  border: 0;
  border-top: 1px solid #7163453d;
  border-radius: 0;
  overflow: visible;
}
#app .meter {
  display: grid;
  justify-items: center;
  gap: 0.18rem;
  padding: 0 0.3rem;
  background: transparent;
  border: 0;
}
#app .meter + .meter {
  border-left: 1px solid #71634555;
}
#app .meter__label {
  color: var(--room-text);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}
#app .meter__value {
  color: var(--room-text);
  font-size: clamp(1.3rem, 6.8vw, 1.9rem);
  line-height: 1.05;
  letter-spacing: 0;
}
#app .meter--score .meter__value {
  font-size: clamp(1.05rem, 5.8vw, 1.7rem);
}
#app .meter__sub {
  color: inherit;
  font-size: 0.65em;
}
#app .field {
  grid-area: field;
  position: relative;
  display: grid;
  place-items: center;
  height: 100%;
  min-height: 0;
  padding: 0;
  background:
    linear-gradient(to bottom, #211912 0 12%, transparent 12% 88%, #211912 88% 100%),
    var(--ui-fusuma-art, url("../assets/ui/fusuma-art.webp")) center / 100% 76% no-repeat,
    var(--paper-base);
  background-blend-mode: normal, multiply;
  box-shadow: inset 0 0 16px #0009;
}
#app .surface {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: auto;
  /* border/padding would shift getBoundingClientRect() away from the SVG. */
  border: 0;
  padding: 0;
  border-radius: 0;
  background-color: var(--room-wood);
  background-image:
    linear-gradient(var(--paper-base), var(--paper-base)), var(--ui-fusuma-art, url("../assets/ui/fusuma-art.webp")),
    var(--ui-wood, url("../assets/ui/wood.webp"));
  background-position: center, center, center;
  background-size:
    100% 76%,
    100% 76%,
    256px 40px;
  background-repeat: no-repeat, no-repeat, repeat;
  background-blend-mode: multiply, normal, normal;
  box-shadow: inset 0 0 0 1px #17130f;
  overflow: hidden;
  touch-action: none;
}
#app .rift > rect:first-of-type {
  fill: transparent;
}
#app .rift__hazard,
#app .rift__closed > rect {
  fill-opacity: var(--room-photo-opacity);
}
#app .rift__band {
  fill: #211912;
  opacity: 0.28;
}
#app .rift__gateline {
  stroke: #b18a50;
  stroke-width: 1;
  stroke-dasharray: none;
  opacity: 0.8;
}
#app .rift__corridor {
  fill: var(--seam-2);
  fill-opacity: 0.97;
}
#app .rift__axis {
  stroke: #c18a2a;
  stroke-width: 0.85;
  stroke-dasharray: none;
  opacity: 1;
  filter: drop-shadow(0 0 2px #fff4c9);
}
#app .rift__edge {
  stroke: #916739;
  stroke-width: 1.4;
  opacity: 1;
}
#app .rift__closed-frame rect {
  stroke: #282019;
  stroke-width: 3;
}
/* 黒い引手は左右各1つ、現行renderGateの座標に追従する。 */
#app #issen-pull .pull__well,
#app #issen-pull .pull__rim {
  x: -8px;
  y: -8px;
  width: 16px;
  height: 16px;
  rx: 8px;
}
#app .pull__well {
  fill: #343a34;
}
#app .pull__rim {
  stroke: #0b100e;
  stroke-width: 0.8;
}
#app .pull__gleam {
  stroke: #9b998777;
  stroke-width: 0.8;
}
#app .surface__tag {
  color: #e4ce9c;
  font-family: var(--font-mincho);
  font-size: 0.84rem;
  letter-spacing: 0.16em;
  transform: translate(-50%, -50%);
}
#app .surface__tag--entry {
  top: 6%;
}
#app .surface__tag--goal {
  top: 94%;
}
#app .surface__signal,
#app .surface__depth-readout {
  display: none;
}
#app .console {
  grid-area: console;
  position: relative;
  display: grid;
  grid-template-rows: minmax(0, 1fr) 44px;
  gap: 0.2rem;
  height: 6.8rem;
  padding: 0.5rem 1.25rem 0.6rem;
  color: var(--room-text);
  background:
    repeating-linear-gradient(92deg, #786a3512 0 1px, transparent 1px 5px),
    repeating-linear-gradient(0deg, #77683810 0 1px, transparent 1px 3px), linear-gradient(#e6d9b6, #d7c8a2);
  box-shadow: inset 0 5px 10px #49341430;
}
#app .console__status:not(.sr-only) {
  align-self: center;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--room-text);
  font-size: 0.9rem;
  line-height: 1.4;
  text-align: center;
  overflow: auto;
}
#app .console > #action {
  grid-row: 2;
  min-height: 44px;
}
#app #action:disabled {
  opacity: 1;
  color: var(--room-muted);
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  font-size: 0.85rem;
}
#app #action:not(:disabled),
#app #verdict-action {
  background: var(--room-red);
  color: #fff8e9;
  border: 1px solid #85261e;
  border-radius: 3px;
  box-shadow: 0 3px 0 #81291f;
}
#app .outcome-signal {
  width: min(88%, 17rem);
  min-height: 8rem;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 0.55rem;
  padding: 1.1rem;
  color: var(--room-text);
  background: color-mix(in srgb, var(--room-wash) 94%, transparent);
  border: 1px solid #a08a5a66;
  border-radius: 4px;
  box-shadow: 0 10px 24px #20170930;
}
#app .outcome-signal[data-tone="pass"] {
  grid-template-columns: 1fr;
}
#app .outcome-signal__mark {
  width: 3.6rem;
  height: 3.6rem;
  border: 2px solid var(--room-red);
  color: var(--room-red);
  font-size: 2.35rem;
  box-shadow: 0 0 0 3px #b8382d22;
  transform: rotate(-10deg);
}
#app .outcome-signal__text {
  font-size: 1.7rem;
  letter-spacing: 0.15em;
}
#app .verdict {
  color: var(--room-text);
  background: color-mix(in srgb, var(--room-wash) 93%, transparent);
}
#app .verdict__title {
  font-size: clamp(1.4rem, 7vw, 2rem);
}
#app .verdict__score {
  color: #896422;
}
#app .mode-menu {
  background: var(--ground);
  background-image: radial-gradient(ellipse at 50% 0%, #f4ddae44, transparent 70%);
}
#app .mode-menu .title-logo {
  border: 0;
  background: transparent;
}
#app .mode-menu .guide {
  border-radius: 5px;
}
#app .mode-menu .mode-choice--practice {
  background: var(--room-red);
  color: #fff8e9;
  border-color: #85261e;
  box-shadow: 0 3px 0 #81291f;
}
#app .mode-menu .mode-choice__mark,
#app .mode-menu .mode-choice__arrow {
  color: inherit;
}
#app button:focus-visible {
  outline: 3px solid #a46e18;
  outline-offset: 3px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --room-paper: #28231c;
    --room-text: #f1e4ca;
    --room-muted: #e0cfab;
    --room-wash: #30281e;
    --room-red: #c44736;
  }
  #app .console {
    background: repeating-linear-gradient(92deg, #f3ddb510 0 1px, transparent 1px 5px), linear-gradient(#352e20, #241f17);
  }
  #app .game-back {
    color: #fff8e9;
    background: #15130f;
  }
  #app .rift__axis {
    stroke: #fff0b3;
  }
  #app .rift__corridor {
    fill: #976a29;
  }
  #app .rift__edge {
    stroke: #dcba71;
  }
  #app .verdict__score {
    color: #e0ba6b;
  }
}
@media (max-height: 700px) and (orientation: portrait) {
  #app[data-screen="game"] {
    grid-template-rows: auto minmax(0, 1fr) 6.1rem;
  }
  #app .hud {
    gap: 0.3rem;
    padding: 0.35rem 0.8rem 0.45rem;
  }
  #app .meter__value {
    font-size: 1.35rem;
  }
  #app .meter__label {
    font-size: 0.7rem;
  }
  #app .console {
    height: 6.1rem;
    padding: 0.3rem 0.9rem 0.45rem;
  }
}
@media (orientation: landscape) and (max-height: 560px) {
  #app[data-screen="game"] {
    width: min(100vw, 56rem);
    grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.9fr);
    grid-template-rows: auto minmax(0, 1fr);
    grid-template-areas: "field hud" "field console";
    gap: 0;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  }
  #app .console {
    align-self: stretch;
    height: 100%;
    grid-template-rows: minmax(0, 1fr) 44px;
    padding: 0.5rem 1rem 1rem;
  }
  #app .hud {
    padding: 0.45rem 0.65rem;
  }
  #app .surface {
    max-height: 100%;
  }
  #app .surface__tag {
    font-size: 0.7rem;
  }
}
@media (min-width: 960px) and (min-height: 561px) {
  #app {
    width: min(calc(100vw - 3rem), 38rem);
    height: min(calc(100dvh - 2rem), 52rem);
  }
  #app[data-screen="game"] {
    width: min(calc(100vw - 3rem), 32rem);
    height: min(calc(100dvh - 2rem), 56rem);
    padding: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  #app *,
  #app *::before,
  #app *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ボタンの連続タップをダブルタップ拡大へ渡さず、クリックを即時に確定する。 */
#app button {
  touch-action: manipulation;
}
/* ホーム（夜の縁側）とゲーム画面の仕上げ。ui-refresh.css の後に読み込む。
   ホームは昼夜テーマに関係なく夜景の一枚絵を使う。 */
:root {
  --home-ink: #07080f;
  --home-text: #f4ecdd;
  --home-muted: #d9ccb4;
  --home-line: #efe2c666;
  --home-glass: #0d0d13b8;
  --home-gold: #e8c47a;
  --home-red: #b7342a;
  --home-red-deep: #7e1d16;
}

/* --- ホーム --- */
#app .mode-menu.home {
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto minmax(1.5rem, 1fr) auto auto;
  grid-template-areas: "tools" "brand" "space" "actions" "best";
  align-content: stretch;
  justify-items: center;
  gap: 0;
  padding: calc(env(safe-area-inset-top) + 0.9rem) calc(env(safe-area-inset-right) + 1rem) calc(env(safe-area-inset-bottom) + 1.4rem)
    calc(env(safe-area-inset-left) + 1rem);
  color: var(--home-text);
  background-color: var(--home-ink);
  background-image:
    linear-gradient(180deg, #05060c33 0%, transparent 22%, transparent 48%, #05060c8c 74%, #05060cd9 100%),
    var(--ui-home-bg, url("../assets/ui/home-bg.webp"));
  background-size: cover, cover;
  background-position:
    center,
    center 30%;
  background-repeat: no-repeat;
  overflow-x: hidden;
}

.home__tools {
  grid-area: tools;
  justify-self: end;
  display: flex;
  gap: 0.6rem;
  position: relative;
  z-index: 1;
}

.home-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  color: var(--home-text);
  background: #0b0b10a8;
  border: 1px solid var(--home-line);
  border-radius: 50%;
  box-shadow: 0 2px 10px #0007;
  cursor: pointer;
}

.home-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}
.home-icon__stroke {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}
.home-icon__off {
  display: none;
}
.home-icon[aria-pressed="false"] .home-icon__on {
  display: none;
}
.home-icon[aria-pressed="false"] .home-icon__off {
  display: block;
}

.home__catch {
  position: absolute;
  top: calc(env(safe-area-inset-top) + 2.2rem);
  left: calc(env(safe-area-inset-left) + 1.6rem);
  display: grid;
  gap: 0.35rem;
  margin: 0;
  font-family: var(--font-mincho);
  font-size: clamp(1rem, 4.6vw, 1.3rem);
  font-weight: 600;
  letter-spacing: 0.32em;
  line-height: 1.2;
  text-align: left;
  text-shadow: 0 2px 8px #000c;
}

.home__catch span:last-child {
  padding-left: 1.4em;
}
/* 横書きの言語は字間を詰め、右上の操作ボタンと重ねない。 */
:root:not(:lang(ja)):not(:lang(zh)) .home__catch {
  max-width: calc(100% - 9.5rem);
  font-size: clamp(0.85rem, 3.8vw, 1.05rem);
  letter-spacing: 0.08em;
}
:root:lang(en) .home__romaji {
  display: none;
}

.home__brand {
  grid-area: brand;
  display: grid;
  justify-items: center;
  gap: 0;
  width: 100%;
  margin-top: clamp(1.8rem, 6dvh, 3.4rem);
}

#app .home .title-logo {
  width: min(84vw, 24rem);
  margin: 0;
  background: transparent;
  border: 0;
  filter: drop-shadow(0 4px 14px #000a);
}

/* 透明PNGの黒い筆文字を白へ反転し、赤い斬撃は色相を戻す。 */
#app .home .title-logo img {
  filter: invert(1) hue-rotate(180deg) saturate(1.25);
}
#app .home .title-logo__fallback {
  color: var(--home-text);
}

.home__romaji {
  margin: -0.9rem 0 0;
  padding-left: 0.7em;
  font-family: var(--font-mincho);
  font-size: clamp(1rem, 4.4vw, 1.3rem);
  letter-spacing: 0.7em;
  text-shadow: 0 2px 8px #000c;
}

.home__tagline {
  position: absolute;
  top: 26%;
  right: calc(env(safe-area-inset-right) + 0.9rem);
  margin: 0;
  font-family: var(--font-mincho);
  font-size: clamp(0.85rem, 3.8vw, 1.05rem);
  letter-spacing: 0.24em;
  line-height: 1;
  writing-mode: vertical-rl;
  text-shadow: 0 2px 8px #000;
}

.home__actions {
  grid-area: actions;
  display: grid;
  gap: 0.7rem;
  width: min(80vw, 22rem);
  position: relative;
  z-index: 1;
}

/* 筆で掃いた朱の帯。clip-pathは装飾の擬似要素だけに掛け、フォーカス枠を切らない。 */
.home-start {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 1.6rem minmax(0, 1fr) 1.6rem;
  align-items: center;
  width: 100%;
  min-height: 3.9rem;
  margin: 0 0 0.25rem;
  padding: 0 1rem;
  color: #fff7ea;
  background: transparent;
  border: 0;
  font-family: var(--font-mincho);
  font-size: clamp(1.1rem, 5.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-shadow: 0 1px 2px #5a120d;
  cursor: pointer;
}

.home-start::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0 -1.1rem;
  background:
    repeating-linear-gradient(178deg, #ffffff0d 0 2px, transparent 2px 7px),
    linear-gradient(180deg, #cf4636 0%, var(--home-red) 48%, var(--home-red-deep) 100%);
  clip-path: polygon(
    3% 16%,
    7% 4%,
    14% 9%,
    30% 2%,
    52% 6%,
    74% 1%,
    90% 7%,
    95% 3%,
    99% 18%,
    96% 32%,
    100% 50%,
    96% 66%,
    99% 84%,
    93% 97%,
    78% 93%,
    56% 99%,
    34% 94%,
    15% 99%,
    6% 94%,
    1% 80%,
    4% 62%,
    0% 44%,
    4% 30%
  );
  filter: drop-shadow(0 3px 6px #0009);
}

.home-start__label {
  grid-column: 2;
}
.home-start__chevron {
  grid-column: 3;
  width: 1.5rem;
  height: 1.5rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.home-menu {
  width: 100%;
  min-height: 3.2rem;
  padding: 0.4rem 1rem;
  color: var(--home-text);
  background: var(--home-glass);
  border: 1px solid var(--home-line);
  border-radius: 0.85rem;
  font-family: var(--font-mincho);
  font-size: clamp(0.98rem, 4.4vw, 1.12rem);
  letter-spacing: 0.12em;
  box-shadow:
    inset 0 1px 0 #ffffff14,
    0 4px 14px #0006;
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  cursor: pointer;
}

.home-menu:active,
.home-icon:active {
  background: #25222bcc;
}
.home-start:active::before {
  filter: brightness(0.9) drop-shadow(0 2px 4px #0009);
}

.home-best {
  grid-area: best;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: 0.8rem;
  width: min(80vw, 22rem);
  margin-top: 1.1rem;
  padding: 0.75rem 1.3rem;
  background: var(--home-glass);
  border: 1px solid var(--home-line);
  border-radius: 0.85rem;
  box-shadow:
    inset 0 1px 0 #ffffff14,
    0 4px 14px #0006;
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.home-best__icon {
  width: 2rem;
  height: 2rem;
  fill: var(--home-gold);
}
.home-best__body {
  display: grid;
  justify-items: start;
  gap: 0.1rem;
  margin: 0;
}
.home-best__label {
  color: var(--home-muted);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
}
.home-best__value {
  color: var(--home-gold);
  font-family: var(--font-mincho);
  font-size: clamp(1.6rem, 7.4vw, 2rem);
  font-weight: 600;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

#app .home .mode-menu__error {
  grid-row: auto;
  color: #ffb4a8;
}
#app .home #boot-retry {
  grid-row: auto;
}

#app .home button:focus-visible,
#app .sheet button:focus-visible,
#app .sheet select:focus-visible {
  outline: 3px solid var(--home-gold);
  outline-offset: 3px;
}

@media (max-height: 700px) and (orientation: portrait) {
  #app .mode-menu.home {
    padding-bottom: calc(env(safe-area-inset-bottom) + 0.9rem);
  }
  .home__brand {
    margin-top: 1.4rem;
  }
  #app .home .title-logo {
    width: min(70vw, 19rem);
  }
  .home__actions {
    gap: 0.5rem;
  }
  .home-start {
    min-height: 3.4rem;
  }
  .home-menu {
    min-height: 2.9rem;
  }
  .home-best {
    margin-top: 0.7rem;
    padding: 0.55rem 1.1rem;
  }
  .home__tagline {
    display: none;
  }
}

@media (orientation: landscape) {
  #app .mode-menu.home {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto auto minmax(0, 1fr);
    grid-template-areas: "tools tools" "brand ." "brand actions" "brand best" "brand .";
    column-gap: 2rem;
    align-items: center;
    background-position:
      center,
      center 40%;
  }
  .home__brand {
    margin-top: 0;
    align-self: center;
  }
  #app .home .title-logo {
    width: min(40vw, 22rem);
  }
  .home__catch {
    top: calc(env(safe-area-inset-top) + 1rem);
  }
  .home__tagline {
    display: none;
  }
  .home-best {
    margin-top: 0.7rem;
  }
  .home-start::before {
    inset: 0 -0.3rem;
  }
}

@media (orientation: landscape) and (max-height: 560px) {
  .home__actions {
    gap: 0.45rem;
  }
  .home-start {
    min-height: 3.1rem;
  }
  .home-menu {
    min-height: 2.75rem;
  }
  .home-best {
    padding: 0.45rem 1rem;
  }
  .home-best__value {
    font-size: 1.5rem;
  }
}

@media (min-width: 960px) and (min-height: 561px) {
  #app .mode-menu.home {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto minmax(1.5rem, 1fr) auto auto;
    grid-template-areas: "tools" "brand" "space" "actions" "best";
    padding: 1.2rem 2rem 1.8rem;
    border: 0;
    border-radius: 0.75rem;
  }
  #app .mode-menu.home > * {
    grid-column: auto !important;
    grid-row: auto !important;
  }
  .home__tools {
    grid-area: tools !important;
  }
  .home__brand {
    grid-area: brand !important;
  }
  .home__actions {
    grid-area: actions !important;
  }
  .home-best {
    grid-area: best !important;
  }
  .home__tagline {
    display: block;
  }
}

/* --- ホームから開くシート --- */
#app .sheet {
  width: min(calc(100vw - 2rem), 26rem);
  max-height: min(85dvh, 44rem);
  padding: 0;
  color: var(--home-text);
  background: radial-gradient(ellipse at 50% 0%, #3a2c2033, transparent 70%), #131218f2;
  border: 1px solid var(--home-line);
  border-radius: 1rem;
  box-shadow: 0 18px 60px #000c;
  overflow: hidden;
}

#app #ranking-sheet {
  height: min(85dvh, 44rem);
}

#app .sheet[open] {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}
#app .sheet::backdrop {
  background: #03040ab3;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.sheet__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.6rem 0.6rem 1.25rem;
  border-bottom: 1px solid #efe2c62e;
}

.sheet__title {
  margin: 0;
  font-family: var(--font-mincho);
  font-size: 1.15rem;
  letter-spacing: 0.14em;
  text-align: left;
}

.sheet__close {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--home-text);
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.sheet__close svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.sheet__body {
  display: grid;
  min-height: 0;
  align-content: start;
  gap: 1rem;
  padding: 1.1rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));
  overflow-y: auto;
  text-align: left;
}

#ranking-body {
  scrollbar-gutter: stable;
}

.sheet__note {
  margin: 0;
  color: var(--home-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}
:root:lang(ja) #challenge-sheet .sheet__note {
  text-wrap: wrap;
}

#app .sheet .difficulty-nav {
  display: block;
  width: 100%;
}
#app .sheet .difficulty-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  overflow: visible;
}
#app .sheet .difficulty-choice {
  min-width: 0;
  min-height: 3.2rem;
  color: var(--home-text);
  background: #ffffff0d;
  border: 1px solid var(--home-line);
  border-radius: 0.7rem;
  font-family: var(--font-mincho);
}
#app .sheet .difficulty-choice[data-state="selected"] {
  color: #fff7ea;
  background: #b7342a55;
  border-color: #e0685a;
  box-shadow: inset 0 0 0 1px #e0685a;
}
#app .sheet .difficulty-choice[data-state="locked"] {
  color: #d9ccb488;
  border-style: dashed;
}
#app .sheet .difficulty-choice__name {
  font-size: 1rem;
  letter-spacing: 0.08em;
  overflow-wrap: anywhere;
}
.home-start--sheet {
  margin: 0.2rem 0 0;
}
.home-start--sheet::before {
  inset: 0 -0.15rem;
}
.sheet__title:focus {
  outline: none;
}

/* 遊び方は既存の手引きを暗い面へ載せ替える。 */
#app .sheet .guide {
  width: auto;
  margin: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}
#app .sheet .guide__body {
  gap: 1rem;
}
#app .sheet .guide__mark {
  color: var(--home-muted);
}
#app .sheet .guide__point dt {
  color: var(--home-gold);
}
#app .sheet .guide__point dd {
  color: var(--home-text);
}
#app .sheet .guide__point dt,
#app .sheet .guide__point dd {
  font-size: 0.95rem;
  line-height: 1.6;
}

.setting {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 3rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid #efe2c61f;
}
.setting:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.setting__label {
  font-size: 1rem;
  letter-spacing: 0.08em;
}
.setting__select {
  min-width: 9rem;
  min-height: 44px;
  padding: 0 0.8rem;
  color: var(--home-text);
  background: #ffffff10;
  border: 1px solid var(--home-line);
  border-radius: 0.6rem;
  font: inherit;
  font-size: 1rem;
}
.setting__select option {
  color: #111;
}
.setting__switch {
  position: relative;
  width: 3.4rem;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}
.setting__switch::before {
  content: "";
  position: absolute;
  inset: 50% 0 auto;
  height: 1.9rem;
  translate: 0 -50%;
  background: #ffffff1f;
  border: 1px solid var(--home-line);
  border-radius: 999px;
  transition: background-color 0.15s;
}
.setting__knob {
  position: absolute;
  top: 50%;
  left: 0.25rem;
  width: 1.45rem;
  height: 1.45rem;
  translate: 0 -50%;
  background: var(--home-text);
  border-radius: 50%;
  transition: left 0.15s;
}
.setting__switch[aria-checked="true"]::before {
  background: var(--home-red);
  border-color: #e0685a;
}
.setting__switch[aria-checked="true"] .setting__knob {
  left: calc(100% - 1.7rem);
}

/* --- ゲーム画面の仕上げ（座標に関わる寸法は変えない） --- */
/* 上部は見本の和紙。墨丸・墨帯は見本から起こした画像を和紙に乗算で重ね、文字だけを実描画する。
   明暗テーマに関係なく明るい和紙のままにする。 */
#app .hud {
  --room-text: #24211b;
  isolation: isolate;
  color: #24211b;
  background-color: #e9dfc6;
  background-image:
    radial-gradient(ellipse 70% 90% at 50% 0%, #f6eedb 0%, transparent 70%),
    radial-gradient(ellipse at 0% 100%, #b99a6426, transparent 55%), radial-gradient(ellipse at 100% 100%, #b99a6426, transparent 55%),
    repeating-linear-gradient(97deg, #7a5f3508 0 1px, transparent 1px 5px),
    repeating-linear-gradient(3deg, #7a5f3506 0 1px, transparent 1px 7px);
  box-shadow:
    inset 0 -1px 0 #6f5a3a55,
    0 3px 8px #2a1d0f40;
}
#app .game-back {
  position: relative;
  width: 50px;
  height: 50px;
  padding: 0;
  font-size: 0;
  background: transparent;
  border: 0;
  border-radius: 50%;
  box-shadow: none;
}
#app .game-back::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -2px;
  background: var(--ui-ink-circle, url("../assets/ui/ink-circle.webp")) center / contain no-repeat;
  mix-blend-mode: multiply;
}
#app .game-back::after {
  content: "";
  width: 24px;
  height: 24px;
  margin: auto;
  background: #f4ecdd;
  -webkit-mask:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 12H5M11 5l-7 7 7 7'/%3E%3C/svg%3E")
    center / contain no-repeat;
  mask:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 12H5M11 5l-7 7 7 7'/%3E%3C/svg%3E")
    center / contain no-repeat;
}

#app .current-difficulty {
  justify-self: center;
  width: min(100%, 10.5rem);
  min-width: 0;
  padding: 0.55rem 0.6rem 0.6rem;
  color: #fbf5e8;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  font-family: var(--font-mincho);
  font-size: clamp(1.1rem, 5.6vw, 1.4rem);
  letter-spacing: 0.3em;
  text-indent: 0.3em;
}
#app .current-difficulty__level,
#app .current-difficulty__mode {
  display: block;
  word-break: keep-all;
  overflow-wrap: break-word;
}
#app .current-difficulty__mode {
  margin-top: 0.1rem;
  font-size: 0.62em;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  opacity: 0.9;
}
#app .current-difficulty::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -0.25rem -0.9rem;
  background: var(--ui-ink-banner, url("../assets/ui/ink-banner.webp")) center / 100% 100% no-repeat;
  mix-blend-mode: multiply;
}
#app .lives__label {
  font-family: var(--font-mincho);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}
#app .lives__pips {
  gap: 0.38rem;
}
#app .lives__pip {
  width: 1.15rem;
  height: 1.15rem;
  background: radial-gradient(circle at 38% 35%, #d9473b, #a3221a 70%);
  border: 0;
  box-shadow: 0 1px 1px #5a0f0a55;
}
#app .meters {
  border-top: 1px solid #3b2d1c66;
  padding-top: 0.55rem;
}
#app .meter + .meter {
  border-left: 1.5px solid #3b2d1c99;
}
#app .meter__label {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}
#app .meter__value {
  font-size: clamp(1.6rem, 8vw, 2.2rem);
}
#app .meter--score .meter__value {
  font-size: clamp(1.45rem, 7.4vw, 2.05rem);
}

#app .meter__label {
  font-family: var(--font-mincho);
}
#app .meter__value {
  font-family: var(--font-mincho);
  font-weight: 600;
}

/* 鴨居・敷居は木札の名札に見せる。 */
#app .surface__tag {
  padding: 0.1rem 0.55rem;
  color: #e9d6a6;
  background: #1c150fd9;
  border: 1px solid #6d52308c;
  border-radius: 2px;
  font-size: 0.8rem;
}

/* 畳の床と行灯の明かり。説明文は筆の朱線を添えた見出しにする。 */
#app .console {
  grid-template-rows: minmax(0, 1fr) 44px;
  background:
    radial-gradient(ellipse 22% 70% at 0% 100%, #ffc76a3d, transparent 70%),
    radial-gradient(ellipse 22% 70% at 100% 100%, #ffc76a3d, transparent 70%),
    repeating-linear-gradient(90deg, #6f5f2e14 0 1px, transparent 1px 4px), linear-gradient(180deg, #2c2217 0 3px, #d9c99b 3px, #cbb983);
  box-shadow: inset 0 8px 14px #3a28124d;
}
#app .console__status:not(.sr-only) {
  position: relative;
  padding-bottom: 0.5rem;
  font-family: var(--font-mincho);
  font-size: clamp(0.95rem, 4.4vw, 1.12rem);
  font-weight: 700;
  letter-spacing: 0.06em;
}
#app .console__status:not(.sr-only)::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.05rem;
  width: min(70%, 15rem);
  height: 0.32rem;
  translate: -50% 0;
  background: linear-gradient(90deg, transparent, #b7342acc 12%, #9e2a20 55%, #b7342a99 88%, transparent);
  border-radius: 50%;
  clip-path: polygon(0 45%, 12% 10%, 40% 30%, 70% 0, 100% 50%, 82% 100%, 50% 75%, 20% 95%);
}
#app #action:disabled {
  font-family: var(--font-mincho);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

@media (prefers-color-scheme: dark) {
  #app .console {
    background:
      radial-gradient(ellipse 22% 70% at 0% 100%, #ffb54e33, transparent 70%),
      radial-gradient(ellipse 22% 70% at 100% 100%, #ffb54e33, transparent 70%),
      repeating-linear-gradient(90deg, #f3ddb50d 0 1px, transparent 1px 4px), linear-gradient(180deg, #120d08 0 3px, #3a3121 3px, #272015);
  }
}

/* --- チャレンジ・ランキングの中身（JSで生成） --- */
.challenge__meta {
  display: grid;
  gap: 0.1rem;
  margin: 0;
}
.challenge__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid #efe2c61f;
}
.challenge__row dt {
  color: var(--home-muted);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}
.challenge__row dd {
  margin: 0;
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
}
.challenge__row:last-child dd {
  color: var(--home-gold);
  font-size: 1.35rem;
  font-weight: 600;
}

.ranking-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.3rem;
  padding: 0.25rem;
  background: #ffffff0d;
  border: 1px solid #efe2c62e;
  border-radius: 0.8rem;
}
.ranking-tab {
  min-height: 44px;
  padding: 0.3rem 0.5rem;
  color: var(--home-muted);
  background: transparent;
  border: 0;
  border-radius: 0.6rem;
  font: inherit;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  cursor: pointer;
}
.ranking-tab[aria-selected="true"] {
  color: #fff7ea;
  background: #b7342a99;
  box-shadow: inset 0 0 0 1px #e0685a;
}
.ranking-list {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.ranking-row {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.65rem 0.2rem;
  border-bottom: 1px solid #efe2c61f;
}
.ranking-row__rank {
  color: var(--home-gold);
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.ranking-row__name {
  font-size: 0.98rem;
  letter-spacing: 0.06em;
  overflow-wrap: anywhere;
}
.ranking-row__score {
  font-family: var(--font-mincho);
  font-size: 1.15rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.ranking-empty {
  margin: 0;
  padding: 1.2rem 0;
  color: var(--home-muted);
  text-align: center;
}

/* ブラウザUIで縦が詰まると縦書きの一文がボタンに重なるため、余裕のある高さだけで出す。 */
@media (max-height: 880px) and (orientation: portrait) {
  .home__tagline {
    display: none;
  }
}

/* --- オンラインランキング（JSで生成） --- */
.ranking-filter {
  width: 100%;
}
.ranking-panel {
  display: grid;
  gap: 0.6rem;
  min-height: 6rem;
}
.ranking-row--me {
  background: #e8c47a14;
  box-shadow: inset 3px 0 0 var(--home-gold);
  border-radius: 0.3rem;
}
.ranking-row--me .ranking-row__name {
  color: var(--home-gold);
}
.ranking-mine {
  margin: 0;
  padding: 0.6rem 0.8rem;
  color: var(--home-text);
  background: #ffffff0a;
  border: 1px solid #efe2c62e;
  border-radius: 0.6rem;
  font-size: 0.92rem;
  text-align: center;
}
.ranking-account {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.8rem;
  padding-top: 0.9rem;
  border-top: 1px solid #efe2c62e;
}
.ranking-account > p {
  flex: 1 1 100%;
  margin: 0;
  color: var(--home-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}
.ranking-account__name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}
.ranking-login,
.ranking-change,
.ranking-save,
.ranking-logout {
  display: inline-grid;
  place-items: center;
  min-height: 44px;
  padding: 0 1rem;
  color: var(--home-text);
  background: #ffffff10;
  border: 1px solid var(--home-line);
  border-radius: 0.7rem;
  font: inherit;
  font-size: 0.92rem;
  text-decoration: none;
  cursor: pointer;
}
.ranking-login {
  flex: 1 1 100%;
  color: #fff7ea;
  background: var(--home-red);
  border-color: #e0685a;
  font-weight: 700;
}
.ranking-logout {
  color: var(--home-muted);
  background: transparent;
  border-color: transparent;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.ranking-name {
  display: flex;
  flex: 1 1 100%;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.ranking-name[hidden] {
  display: none;
}
.setting__input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 44px;
  padding: 0 0.8rem;
  color: var(--home-text);
  background: #ffffff10;
  border: 1px solid var(--home-line);
  border-radius: 0.6rem;
  font: inherit;
  font-size: 1rem;
}
.ranking-save {
  flex: 0 0 auto;
  color: #fff7ea;
  background: var(--home-red);
  border-color: #e0685a;
}
#app .sheet a:focus-visible,
#app .sheet input:focus-visible {
  outline: 3px solid var(--home-gold);
  outline-offset: 3px;
}

/* --- ゲーム画面: 見本に合わせ、墨絵を覆わず合わせ目を光らせる（座標・判定は変えない） --- */
#app .meter {
  text-align: center;
}
#app .meter {
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
}
#app .meter__label,
#app .meter__value {
  justify-self: center;
  text-align: center;
}

/* 開いた合わせ目は、難易度ごとの襖紙から独立した暖色で塗り分ける。 */
#app .rift__corridor {
  fill: url(#issen-opening);
  fill-opacity: 1;
}
#app .rift__hazard,
#app .rift__closed > rect {
  fill-opacity: 0.12;
}
/* 開いた縁は襖の木枠（框）として太く描く。 */
#app .rift__edge {
  stroke: #2a1c10;
  stroke-width: 3.2;
  opacity: 1;
  filter: drop-shadow(0 0 1.5px #0009);
}
#app .rift__axis {
  stroke: #ffd98a;
  stroke-width: 1.6;
  stroke-dasharray: none;
  opacity: 1;
  filter: drop-shadow(0 0 1.5px #fff6d8) drop-shadow(0 0 4px #ff9d2e) drop-shadow(0 0 9px #ff7a1acc);
}
.app[data-phase="active"]:not([data-drawing="true"]) .rift__axis {
  animation: issen-seam-glow 1.6s ease-in-out infinite alternate;
}
@keyframes issen-seam-glow {
  from {
    opacity: 0.78;
  }
  to {
    opacity: 1;
  }
}

/* 刃筋は白い筆の払い。 */
#app .rift__trail--halo {
  stroke: #ffffff;
  stroke-width: 12;
  opacity: 0.38;
  filter: blur(3.5px);
}
#app .rift__trail--core {
  stroke: #ffffff;
  stroke-width: 4.2;
  filter: drop-shadow(0 0 3px #ffffffcc);
}
#app .rift__head {
  fill: #ffffff;
}

/* 鴨居・敷居の帯は濃い木目の梁にする。 */
#app .rift__band {
  fill: #1b130c;
  opacity: 0.72;
}
#app .rift__gateline {
  stroke: #6b4a2a;
  stroke-width: 2;
  opacity: 1;
}

/* 操作欄は行灯の明かりが差す畳の床。 */
#app .console {
  background:
    linear-gradient(180deg, #16100a 0 3px, transparent 3px),
    var(--ui-tatami-floor, url("../assets/ui/tatami-floor.webp")) center / cover no-repeat,
    linear-gradient(#d9c99b, #cbb983);
}
#app .console__status:not(.sr-only) {
  color: #211a12;
  text-shadow:
    0 0 10px #f3e7c6,
    0 0 2px #f3e7c6;
}
#app #action:disabled {
  color: #3c3226;
  text-shadow: 0 0 8px #f3e7c6;
}
@media (prefers-color-scheme: dark) {
  #app .console {
    background:
      linear-gradient(180deg, #0c0805 0 3px, transparent 3px),
      linear-gradient(#0000004d, #0000004d),
      var(--ui-tatami-floor, url("../assets/ui/tatami-floor.webp")) center / cover no-repeat,
      linear-gradient(#352e20, #241f17);
  }
  #app .console__status:not(.sr-only) {
    color: #fff4dc;
    text-shadow: 0 1px 6px #000c;
  }
  #app #action:disabled {
    color: #f0e2c4;
    text-shadow: 0 1px 6px #000c;
  }
}

/* 日本語の説明は文節で折り返し、助詞や記号だけが次行へ落ちないようにする。 */
#app .sheet,
#app .console,
#app .verdict {
  line-break: strict;
  word-break: auto-phrase;
  text-wrap: pretty;
}

/* 狭い画面でも「残心」の見出しを残し、赤丸を画面内に収める。 */
@media (max-width: 360px) {
  #app .lives__label {
    display: block;
    font-size: 0.8rem;
  }
  #app .lives__pips {
    gap: 0.25rem;
  }
  #app .lives__pip {
    width: 0.95rem;
    height: 0.95rem;
  }
  #app .hud__bar {
    grid-template-columns: 50px minmax(0, 1fr) auto;
  }
}

/* ランキングのタブは語の途中で折り返さない。狭い画面は文字を少し詰める。 */
.ranking-tab {
  white-space: nowrap;
  word-break: keep-all;
  font-size: clamp(0.78rem, 3.9vw, 0.92rem);
  letter-spacing: 0;
  padding: 0.3rem 0.35rem;
}

/* 結果: 次の難易度・再挑戦・共有を縦に並べる。 */
#app .verdict__actions {
  display: grid;
  gap: 0.6rem;
  width: min(15rem, calc(100vw - 5rem));
  justify-self: center;
}
#app .verdict__actions .btn {
  width: 100%;
  min-height: 46px;
  white-space: nowrap;
  font-family: var(--font-mincho);
  letter-spacing: 0.1em;
}
#app .verdict__next {
  background: var(--room-red);
  color: #fff8e9;
  border: 1px solid #85261e;
  border-radius: 3px;
  box-shadow: 0 3px 0 #81291f;
}
#app .verdict__next ~ #verdict-action:not([hidden]) {
  color: var(--room-text);
  background: transparent;
  border: 1px solid #6f5a3a88;
  box-shadow: none;
}
#app .verdict__next[hidden] ~ #verdict-action {
  color: #fff8e9;
  background: var(--room-red);
  border: 1px solid #85261e;
  box-shadow: 0 3px 0 #81291f;
}
#app .verdict__share {
  color: var(--room-text);
  background: #ffffff66;
  border: 1px solid #6f5a3a88;
  border-radius: 3px;
}

/* 結果の絵は襖の左右を含む画面幅へ広げ、文字と操作はHTMLで重ねる。 */
#app[data-result] .verdict {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  padding: 1rem;
  overflow-y: auto;
  touch-action: pan-y;
  color: #fff1cf;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}
#app[data-result="clear"] .verdict {
  background-image:
    linear-gradient(180deg, #100b0800 25%, #100b0866 50%, #100b08e8 76%), var(--ui-verdict-clear, url("../assets/ui/verdict-clear-v2.webp"));
}
#app[data-result="over"] .verdict {
  padding-bottom: clamp(1rem, 8dvh, 5rem);
  background-image:
    linear-gradient(180deg, #100b0800 25%, #100b0866 50%, #100b08e8 76%), var(--ui-verdict-over, url("../assets/ui/verdict-over.webp"));
}
#app[data-result] .verdict__title {
  color: #fff0c4;
  font-size: clamp(2rem, 9vw, 2.8rem);
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  text-shadow:
    0 0 18px #d79336,
    0 2px 4px #000;
}
#app[data-result="over"] .verdict__title {
  color: #ffbea2;
  text-shadow:
    0 0 14px #a53a26,
    0 2px 4px #000;
}
#app[data-result] .verdict__body {
  color: #f6e6c3;
  font-size: 0.9rem;
  text-shadow: 0 2px 4px #000;
}
#app[data-result] .verdict__score {
  margin: 0.1rem 0 0.6rem;
  color: #fff1c9;
  font-size: clamp(2.1rem, 9vw, 3rem);
  text-shadow: 0 2px 6px #000;
}
#app[data-result] .verdict__unit {
  color: #f3dca7;
}
#app[data-result] .verdict__actions {
  width: min(18rem, 100%);
}
#app[data-result] .verdict__actions .btn {
  color: #fff5df;
  background: #130e0bd9;
  border-color: #d8b26a99;
  box-shadow: 0 3px 0 #080604;
}
#app[data-result] #verdict-action {
  color: #fff5df;
  background: #a42e24;
  border-color: #d2684b;
}
#app[data-result="clear"] .verdict__next ~ #verdict-action:not([hidden]) {
  color: #fff5df;
  background: #130e0bd9;
  border-color: #d8b26a99;
}
#app[data-result="clear"] .verdict__next:not([hidden]),
#app[data-result="clear"] .verdict__next[hidden] ~ #verdict-action {
  background: #a42e24;
  border-color: #d2684b;
}

@media (orientation: landscape) and (max-height: 560px) {
  #app[data-result] .verdict {
    justify-content: center;
    gap: 0.25rem;
    padding: 0.6rem;
  }
  #app[data-result] .verdict__title {
    font-size: 1.8rem;
  }
  #app[data-result] .verdict__score {
    margin: 0 0 0.2rem;
    font-size: 2rem;
  }
  #app[data-result] .verdict__actions {
    gap: 0.3rem;
  }
}

/* 狭い画面の遊び方は図を上に置き、説明の幅を確保する。 */
@media (max-width: 380px) {
  #app .sheet .guide__body {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
  }
  #app .sheet .guide__points {
    justify-self: stretch;
  }
}
/* 韓国語は語の途中で折り返さない。 */
:root:lang(ko) #app {
  word-break: keep-all;
}
/* 横書き言語の操作欄の補足は字間を詰め、1行に収める。 */
:root:not(:lang(ja)) #app #action:disabled {
  letter-spacing: 0;
  font-size: 0.82rem;
  white-space: nowrap;
}
:root:not(:lang(ja)) #app .current-difficulty {
  letter-spacing: 0.12em;
  text-indent: 0.12em;
}
:root:not(:lang(ja)) #app .current-difficulty__mode {
  letter-spacing: 0.08em;
  text-indent: 0.08em;
}
/* ラテン文字の長い難易度名（例 Principiante）を単語の途中で折らず、上部HUDの1行に収める。 */
:root:is(:lang(es), :lang(fr), :lang(de), :lang(pt)) #app .current-difficulty {
  width: min(100%, 13rem);
  font-size: clamp(1rem, 4.6vw, 1.22rem);
  letter-spacing: 0.04em;
  text-indent: 0.04em;
}
@media (min-width: 361px) {
  :root:is(:lang(es), :lang(fr), :lang(de), :lang(pt)) #app .hud__bar {
    grid-template-columns: 4.4rem minmax(0, 1fr) 4.4rem;
  }
}
/* 結果表示中は襖の上のボタンだけにし、下の再挑戦を重複させない（高さは保つ）。 */
#app[data-result] .console > #action {
  visibility: hidden;
}

/* 準備中は画像未取得でも和紙・墨色と文言を即時表示する。 */
#app .preparation {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 1.8rem;
  padding: calc(env(safe-area-inset-top) + 2rem) calc(env(safe-area-inset-right) + 1.5rem) calc(env(safe-area-inset-bottom) + 2.5rem)
    calc(env(safe-area-inset-left) + 1.5rem);
  color: #fff1cf;
  background-color: #17110b;
  background-image:
    linear-gradient(180deg, transparent 35%, #100b0844 58%, #100b08bb),
    var(--preparation-art, radial-gradient(ellipse at 50% 20%, #78603a, #17110b 70%));
  background-size: cover;
  background-position: center;
  text-align: center;
  font-family: var(--font-mincho);
  overflow-y: auto;
}
#app .preparation[hidden] {
  display: none;
}
.preparation__copy {
  display: grid;
  justify-items: center;
  gap: 0.8rem;
}
.preparation__copy h2 {
  margin: 0;
  font-size: clamp(1.6rem, 7vw, 2.2rem);
  letter-spacing: 0.15em;
}
.preparation__copy p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
}
.preparation__seal {
  padding: 0.4rem;
  border: 1px solid #ba6154;
  color: #e99b83;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
}
.preparation__line {
  width: 6rem;
  height: 2px;
  background: #e8c47a;
  box-shadow: 0 0 12px #e8c47a88;
  animation: issen-preparation 1.4s ease-in-out infinite alternate;
}
#app .preparation__back {
  min-width: 8rem;
  min-height: 48px;
  color: #fff1cf;
  background: #100b0888;
  border: 1px solid #e8c47a77;
}
@keyframes issen-preparation {
  from {
    opacity: 0.3;
    transform: scaleX(0.5);
  }
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}
@media (orientation: landscape) and (max-height: 500px) {
  #app .preparation {
    justify-content: center;
    gap: 0.8rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }
  .preparation__copy {
    gap: 0.4rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  .preparation__line {
    animation: none;
  }
}

/* あそびば！: 矢印をタップして展開し、リンクからポータルへ戻る。夜景のホームに合わせて黒系。 */
.home-portal-menu {
  position: absolute;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  z-index: 5;
  width: 44px;
  height: 44px;
  color: #e8f7ff;
}
.home-portal-menu:has([data-asobiba-link][hidden]) {
  display: none;
}
.home-portal-menu > summary,
.home-portal {
  box-sizing: border-box;
  min-height: 44px;
  border: 1px solid #6fd6ff66;
  border-radius: 999px;
  background: #040b16b8;
  color: #e8f7ff;
  box-shadow: 0 6px 16px #0006;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  font:
    800 13px / 1 system-ui,
    sans-serif;
  letter-spacing: 0;
  text-decoration: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.home-portal-menu > summary {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
  list-style: none;
}
.home-portal-menu > summary::-webkit-details-marker {
  display: none;
}
.home-portal-menu > summary::marker {
  content: "";
}
.home-portal-menu[open] > summary svg {
  transform: rotate(180deg);
}
.home-portal {
  position: absolute;
  top: 0;
  left: 50px;
  display: flex;
  align-items: center;
  gap: 4px;
  width: max-content;
  max-width: calc(100vw - 80px);
  padding: 0 14px 0 10px;
  white-space: nowrap;
}
.home-portal-menu:not([open]) > .home-portal,
.home-portal[hidden] {
  display: none;
}
.home-portal-menu svg {
  flex: none;
}
.home-portal-menu > summary:focus-visible,
.home-portal:focus-visible {
  outline: 3px solid #e8f7ff;
  outline-offset: 2px;
}
/* メニューがあるときは、キャッチコピーを矢印ボタンの右へずらす。 */
.home:has(.home-portal-menu [data-asobiba-link]:not([hidden])) .home__catch {
  left: calc(max(10px, env(safe-area-inset-left)) + 58px);
}
:root:not(:lang(ja)):not(:lang(zh)) .home:has(.home-portal-menu [data-asobiba-link]:not([hidden])) .home__catch {
  font-size: clamp(0.75rem, 3.3vw, 1rem);
}

/* 結果時に空く下部の操作枠を使い、結果の絵とボタンの配置を保つ。 */
.console > #action,
.console > .result-portal {
  grid-area: 2 / 1;
}
.result-portal {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0.5rem;
  color: var(--room-text);
  font-size: 0.85rem;
  line-height: 1.5;
  text-align: center;
  text-underline-offset: 4px;
  touch-action: manipulation;
}
.result-portal:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: -3px;
}

/* 欧文の長い難易度名（Fortgeschritten、Maestro de espada など）は語の途中で切らず、必要ならハイフンで分ける。 */
:root:not(:lang(ja)):not(:lang(zh)):not(:lang(ko)) #app .sheet .difficulty-choice__name,
:root:not(:lang(ja)):not(:lang(zh)):not(:lang(ko)) .mode-menu .difficulty-choice__name,
:root:not(:lang(ja)):not(:lang(zh)):not(:lang(ko)) #app .current-difficulty {
  overflow-wrap: break-word;
  hyphens: auto;
  letter-spacing: 0.02em;
}
:root:not(:lang(ja)):not(:lang(zh)):not(:lang(ko)) #app .sheet .difficulty-choice__name {
  font-size: clamp(0.82rem, 3.8vw, 1rem);
}
:root:lang(ko) #app {
  word-break: keep-all;
}

/* 初めての人への見本。光る点が中心線を上から下へたどる。 */
.rift__demo-path {
  fill: none;
  stroke: #fff4c8;
  stroke-width: 2;
  stroke-dasharray: 3 7;
  stroke-linecap: round;
  opacity: 0.55;
  vector-effect: non-scaling-stroke;
}
.rift__demo-dot {
  fill: #fff6d6;
  stroke: #d79336;
  stroke-width: 3;
  filter: drop-shadow(0 0 6px #ffcf6b);
}
.app[data-drawing="true"] .rift__demo {
  display: none;
}

/* 結果の記録（新記録・内訳・ランキング）。 */
#app[data-result] .verdict__record {
  display: grid;
  justify-items: center;
  gap: 0.3rem;
  width: min(18rem, 100%);
  margin: -0.3rem 0 0.4rem;
  color: #f6e6c3;
  text-shadow: 0 2px 4px #000;
}
#app[data-result] .verdict__best {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.9rem;
}
#app[data-result] .verdict__best[data-new="true"] {
  color: #ffd76a;
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
#app[data-result] .verdict__streak {
  margin-inline-start: 0.6em;
  color: #ffcf9a;
}
#app[data-result] .verdict__stages {
  display: grid;
  gap: 0.1rem;
  width: 100%;
  margin: 0;
  padding: 0.35rem 0.6rem;
  list-style: none;
  background: #100b08a6;
  border: 1px solid #d8b26a55;
  border-radius: 3px;
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  text-align: center;
  white-space: pre-wrap;
}
#app[data-result] .verdict__ranking {
  margin: 0;
  font-size: 0.85rem;
}
#app[data-result] .verdict__ranking[data-state="rank"],
#app[data-result] .verdict__ranking[data-state="saved"] {
  color: #ffe3a3;
  font-weight: 700;
}
#app[data-result] .verdict__ranking[data-state="failed"],
#app[data-result] .verdict__ranking[data-state="unranked"] {
  color: #ffbea2;
}
#app[data-result] .verdict__invite {
  min-height: 44px;
  padding: 0 1rem;
  color: #fff5df;
  background: #130e0bd9;
  border: 1px solid #d8b26a99;
  border-radius: 3px;
  font-family: var(--font-mincho);
}
.ranking-name__hint {
  flex-basis: 100%;
  margin: 0.2rem 0 0;
  font-size: 0.78rem;
  opacity: 0.8;
}

/* 中身が高さを超えたら、行を潰さずに中でスクロールする（WebKitは行を縮めて重ねてしまう）。 */
#ranking-body {
  grid-auto-rows: max-content;
}

/* 結果が画面より高いとき、下寄せのままだと上（題字・得点）へスクロールできない。余白を上に置いて下寄せにする。 */
#app[data-result] .verdict {
  justify-content: flex-start;
}
#app[data-result] .verdict > :first-child {
  margin-top: auto;
}
@media (max-height: 700px) {
  #app[data-result] .verdict__stages {
    padding: 0.2rem 0.5rem;
    font-size: 0.72rem;
  }
  #app[data-result] .verdict__score {
    margin-bottom: 0.3rem;
  }
}
/* 背の低い画面では、操作ボタンを画面内に残すため一筆ごとの内訳を省く（最後の一筆の内訳は下の欄に出ている）。 */
@media (max-height: 640px) {
  #app[data-result] .verdict__stages {
    display: none;
  }
}