/* ============================================================
   百鬼一閃 — 和風・居合リズムアクション
   ============================================================ */
:root {
  --bg: #12100f;
  --bg2: #1c1815;
  --panel: #221d19;
  --ink: #f4ece0;
  --ink-dim: #b8ab98;
  --gold: #e8b64c;
  --gold-2: #f6d488;
  --red: #c8443c;
  --red-2: #e2685f;
  --green: #6fae4f;
  --blue: #4f8fd0;
  --line: rgba(232, 182, 76, 0.22);
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
  --stage-max: 600px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  overscroll-behavior: none;
}
body {
  background:
    radial-gradient(120% 80% at 50% -10%, #2a221c 0%, var(--bg) 60%),
    var(--bg);
  min-height: 100vh;
}
.app {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 12px 40px;
}
/* PCなど広い画面では全体を大きく */
@media (min-width: 760px) {
  :root { --stage-max: 680px; }
  .app { max-width: 900px; }
  .title { font-size: 30px; }
  .hint { font-size: 14px; }
  .combo { font-size: 30px; }
  .score { font-size: 26px; }
  .hp { font-size: 24px; }
}

/* ---- トップバー ---- */
.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 4px 8px;
}
.back {
  color: var(--ink-dim); text-decoration: none; font-size: 14px;
  padding: 6px 8px; border-radius: 8px; white-space: nowrap;
}
.back:hover { color: var(--gold); background: rgba(255,255,255,0.04); }
.brand { display: flex; align-items: center; gap: 8px; margin: 0 auto; }
.crest { width: 30px; height: 30px; color: var(--gold); }
.title {
  font-family: "BrushIai", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 26px; font-weight: 800; margin: 0; letter-spacing: 2px;
}
.title .accent { color: var(--gold); }
.icon-btn {
  background: var(--panel); border: 1px solid var(--line); color: var(--ink);
  width: 40px; height: 40px; border-radius: 10px; font-size: 18px; cursor: pointer;
  display: grid; place-items: center;
}
.icon-btn:active { transform: scale(0.94); }

.wa-divider { display: block; width: 100%; height: 12px; margin: 2px 0 10px; opacity: 0.8; }

/* ---- ステージ ---- */
.stage-wrap {
  position: relative;
  width: 100%;
  max-width: var(--stage-max);
  margin: 0 auto;
  aspect-ratio: 3 / 4;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #0d0b0a;
  touch-action: none;
}
.stage { display: block; width: 100%; height: 100%; }

/* ---- プレイ中HUD ---- */
.hud {
  position: absolute; top: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; gap: 8px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0,0,0,0.55), rgba(0,0,0,0));
}
.hud-left, .hud-right { display: flex; align-items: center; gap: 6px; }
.hud-right { flex-direction: column; align-items: flex-end; gap: 0; }
.hp { font-size: 20px; letter-spacing: 1px; }
.combo {
  font-family: "BrushIai", "Yu Mincho", serif; font-weight: 800;
  font-size: 26px; color: var(--gold-2);
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}
.score-cap { font-size: 10px; color: var(--ink-dim); }
.cuts { font-size: 12px; color: var(--ink-dim); }
.score { font-size: 22px; font-weight: 800; color: var(--ink); line-height: 1; }

/* ---- 一閃ゲージ ---- */
.issen-wrap {
  position: absolute; left: 14px; right: 14px; bottom: 12px;
  height: 12px; border-radius: 8px;
  background: rgba(0,0,0,0.5); border: 1px solid var(--line);
  overflow: hidden; pointer-events: none;
}
.issen-bar {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0%;
  background: linear-gradient(90deg, var(--red), var(--gold));
  transition: width 0.12s linear;
}
.issen-wrap.ready .issen-bar {
  background: linear-gradient(90deg, var(--gold-2), #fff, var(--gold-2));
  animation: issenPulse 0.7s ease-in-out infinite;
}
@keyframes issenPulse { 0%,100%{ filter: brightness(1);} 50%{ filter: brightness(1.5);} }
.issen-label {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
  font-size: 9px; letter-spacing: 3px; color: var(--ink);
  font-family: "Yu Mincho", serif;
}

/* ---- オーバーレイ共通 ---- */
.overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; padding: 24px 20px; text-align: center;
  background: rgba(12, 10, 9, 0.86);
  backdrop-filter: blur(3px);
  z-index: 5;
}
.overlay.hidden, .hidden { display: none !important; }

.menu-kicker { color: var(--gold); letter-spacing: 4px; font-size: 12px; margin: 0; }
.menu-title {
  font-family: "BrushIai", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 46px; margin: 0; letter-spacing: 6px; font-weight: 800;
  text-shadow: 0 3px 16px rgba(0,0,0,0.6);
}
.menu-lead { color: var(--ink-dim); margin: 0 0 6px; font-size: 14px; }
.menu-lead b { color: var(--gold-2); }
.tracks { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 320px; }
.track-btn {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel); border: 1px solid var(--line); color: var(--ink);
  border-radius: 12px; padding: 12px 14px; cursor: pointer; text-align: left;
  transition: transform 0.08s, border-color 0.15s, background 0.15s;
}
.track-btn:hover { border-color: var(--gold); background: #2a231d; }
.track-btn:active { transform: scale(0.98); }
.track-diff {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: 10px;
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
  font-family: "Yu Mincho", serif;
}
.track-diff.d1 { background: rgba(111,174,79,0.18); color: var(--green); }
.track-diff.d2 { background: rgba(79,143,208,0.18); color: var(--blue); }
.track-diff.d3 { background: rgba(200,68,60,0.2); color: var(--red-2); }
.track-body { flex: 1; min-width: 0; }
.track-name { font-weight: 800; font-size: 20px; letter-spacing: 2px; }
.track-meta { color: var(--ink-dim); font-size: 12px; margin-top: 2px; }
.menu-foot { margin-top: 8px; }

.btn {
  background: var(--panel); border: 1px solid var(--line); color: var(--ink);
  border-radius: 10px; padding: 10px 18px; font-size: 15px; cursor: pointer;
  font-family: inherit;
}
.btn:hover { border-color: var(--gold); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--gold); color: #201a12; border-color: var(--gold); font-weight: 800; }
.btn-primary:hover { background: var(--gold-2); }
.btn-mini { padding: 7px 12px; font-size: 13px; }

/* ---- 結果 ---- */
.result-title { font-family: "BrushIai", "Yu Mincho", serif; font-size: 34px; margin: 0; letter-spacing: 4px; }
.result-score { margin: 0; font-size: 20px; color: var(--ink-dim); }
.result-score b { font-size: 52px; color: var(--gold-2); font-weight: 800; }
.result-score .unit { font-size: 18px; margin-left: 4px; }
.result-sub { margin: 0; color: var(--ink-dim); font-size: 14px; }
.result-sub b { color: var(--ink); font-size: 18px; }
.result-rank { margin: 4px 0 0; color: var(--gold); font-weight: 800; font-size: 16px; }
.result-name { display: flex; align-items: center; gap: 8px; }
.result-name label { color: var(--ink-dim); font-size: 13px; }
.result-name input {
  background: #17130f; border: 1px solid var(--line); color: var(--ink);
  border-radius: 8px; padding: 8px 10px; font-size: 15px; width: 140px; font-family: inherit;
}
.result-actions { display: flex; gap: 10px; margin-top: 6px; }

/* ---- キャリブ ---- */
.calib-title { font-family: "Yu Mincho", serif; font-size: 26px; margin: 0; letter-spacing: 2px; }
.calib-lead { color: var(--ink-dim); font-size: 13px; margin: 0; line-height: 1.7; }
.calib-meter { width: 120px; height: 120px; display: grid; place-items: center; }
.calib-ring {
  width: 40px; height: 40px; border-radius: 50%;
  border: 3px solid var(--gold); opacity: 0.5;
}
.calib-ring.flash { animation: calibFlash 0.18s ease-out; }
@keyframes calibFlash { 0%{ transform: scale(1.9); opacity: 1; box-shadow: 0 0 24px var(--gold);} 100%{ transform: scale(1); opacity: 0.5; box-shadow: none;} }
.calib-val { margin: 0; font-size: 14px; color: var(--ink-dim); }
.calib-val b { color: var(--gold-2); font-size: 20px; }
.calib-slider { display: flex; align-items: center; gap: 10px; width: 100%; max-width: 300px; }
.calib-slider input[type=range] { flex: 1; accent-color: var(--gold); }
.calib-tap-judge { color: var(--ink-dim); font-size: 13px; margin: 0; min-height: 18px; }

/* ---- スマホ用一閃ボタン ---- */
.issen-btn {
  position: fixed; right: 16px; bottom: 16px; z-index: 20;
  width: 84px; height: 84px; border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, var(--red-2), var(--red));
  border: 2px solid var(--gold); color: #fff;
  font-family: "Yu Mincho", serif; font-size: 20px; font-weight: 800; letter-spacing: 2px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.5); cursor: pointer;
  opacity: 0.4; transition: opacity 0.2s, transform 0.1s;
}
.issen-btn.ready { opacity: 1; animation: issenPulse 0.7s ease-in-out infinite; }
.issen-btn:active { transform: scale(0.92); }

/* ---- ヒント ---- */
.hint {
  max-width: var(--stage-max); margin: 12px auto 0;
  color: var(--ink-dim); font-size: 12px; line-height: 1.7; text-align: center;
}
.hint b { color: var(--ink); }

/* ---- ランキング ---- */
.ranking { max-width: var(--stage-max); margin: 22px auto 0; }
.ranking-title {
  font-family: "BrushIai", "Yu Mincho", serif; font-size: 20px; letter-spacing: 3px;
  text-align: center; color: var(--gold); margin: 0 0 10px;
  border-bottom: 1px solid var(--line); padding-bottom: 8px;
}
.rank-list { list-style: none; margin: 0; padding: 0; }
.rank-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-bottom: 1px solid rgba(255,255,255,0.05);
  font-variant-numeric: tabular-nums;
}
.rank-list li .rk { width: 24px; color: var(--gold); font-weight: 800; text-align: center; }
.rank-list li .rk.top { color: var(--gold-2); }
.rank-list li .nm { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-list li .sc { font-weight: 800; }
.rank-list li .tr { color: var(--ink-dim); font-size: 11px; width: 52px; text-align: right; }
.rank-list li.me { background: rgba(232,182,76,0.08); border-radius: 8px; }
.rank-empty { text-align: center; color: var(--ink-dim); font-size: 13px; }

/* ---- SEO本文 ---- */
.about { max-width: var(--stage-max); margin: 26px auto 0; color: var(--ink-dim); }
.about h2 { color: var(--ink); font-size: 18px; margin: 0 0 8px; }
.about h3 { color: var(--gold); font-size: 15px; margin: 18px 0 6px; }
.about p { font-size: 13px; line-height: 1.85; margin: 0; }
.about b { color: var(--ink); }
.credits { text-align: center; color: var(--ink-dim); font-size: 11px; margin: 22px 0 0; opacity: 0.7; }

@media (max-width: 480px) {
  .title { font-size: 22px; }
  .menu-title { font-size: 34px; }
  .result-score b { font-size: 44px; }
}