/* ==========================================================
   星盤のステラ ～最強の一手を目指して～
   共通トークン / 共通UI部品
   色・余白・影・角丸はすべてここで管理する
   ========================================================== */

:root {
  /* --- 色（濃紺・黒・金 ＋ 青紫・白・藤色） --- */
  --c-ink:        #0a0f24;   /* 最深部の濃紺黒 */
  --c-navy:       #121a3c;   /* 基本パネル */
  --c-navy-2:     #1b2450;   /* 一段浮いたパネル */
  --c-navy-line:  #2c3768;   /* 罫線 */
  --c-gold:       #d9b45a;   /* 金（主役） */
  --c-gold-bright:#f4d98c;   /* 金ハイライト */
  --c-gold-deep:  #9c7a2e;   /* 金の影 */
  --c-violet:     #6d5bd0;   /* 青紫 */
  --c-wisteria:   #b9a5e8;   /* 藤色 */
  --c-white:      #f6f4ff;   /* 白（文字） */
  --c-dim:        #9aa0c4;   /* 補助文字 */
  --c-up:         #7ee8a2;   /* 上昇値 */
  --c-danger:     #e87e8e;

  /* --- 余白 --- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;

  /* --- 角丸 --- */
  --r-s: 8px;
  --r-m: 14px;
  --r-l: 22px;
  --r-full: 999px;

  /* --- 影 --- */
  --sh-panel: 0 6px 18px rgba(0, 0, 0, .45);
  --sh-gold:  0 0 14px rgba(217, 180, 90, .45);
  --sh-inner: inset 0 1px 0 rgba(255, 255, 255, .06);

  /* --- 文字 --- */
  --f-display: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --f-body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;

  /* --- 操作 --- */
  --tap-min: 44px;
  --audio-dock-height: 53px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-ink);
  color: var(--c-white);
  font-family: var(--f-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  overflow-x: hidden;
  /* 光る碁盤：格子＋星（天元）の淡い発光 */
  background-image:
    radial-gradient(circle at 50% 18%, rgba(109, 91, 208, .22), transparent 55%),
    radial-gradient(circle at 82% 78%, rgba(217, 180, 90, .10), transparent 45%),
    linear-gradient(rgba(185, 165, 232, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 165, 232, .05) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
}

img { max-width: 100%; display: block; }
button { font-family: inherit; }

.audio-control-dock {
  position: relative;
  z-index: 45;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  width: 100%;
  min-height: calc(var(--audio-dock-height) + env(safe-area-inset-bottom, 0px));
  padding: 7px 12px calc(7px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid rgba(185, 165, 232, .22);
  background: linear-gradient(180deg, rgba(10, 15, 36, .92), rgba(7, 11, 27, .98));
  box-shadow: 0 -8px 24px rgba(0, 0, 0, .28);
}
.audio-control-dock--standalone {
  width: min(100%, 520px);
  margin: 0 auto;
}
.audio-control-dock--embedded {
  width: auto;
  min-height: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}
.audio-control-dock--embedded .bgm-toggle,
.audio-control-dock--embedded .sfx-toggle {
  min-width: 64px;
  padding-inline: 8px;
}
.bgm-toggle {
  position:static;
  min-width:88px; min-height:38px; padding:0 12px; border-radius:999px;
  border:1px solid var(--c-gold); background:rgba(10,15,36,.9); color:var(--c-gold-bright);
  font-size:11px; font-weight:800; box-shadow:0 4px 16px rgba(0,0,0,.5),0 0 10px rgba(217,180,90,.25);
  backdrop-filter:blur(7px); cursor:pointer;
}
.bgm-toggle.is-off { color:var(--c-dim); border-color:var(--c-navy-line); opacity:.76; }
.bgm-toggle:focus-visible { outline:2px solid var(--c-wisteria); outline-offset:2px; }
.sfx-toggle {
  position:static;
  min-width:88px; min-height:34px; padding:0 12px; border-radius:999px;
  border:1px solid var(--c-wisteria); background:rgba(10,15,36,.9); color:var(--c-wisteria);
  font-size:11px; font-weight:800; box-shadow:0 4px 16px rgba(0,0,0,.45);
  backdrop-filter:blur(7px); cursor:pointer;
}
.sfx-toggle.is-off { color:var(--c-dim); border-color:var(--c-navy-line); opacity:.76; }
.sfx-toggle:focus-visible { outline:2px solid var(--c-gold); outline-offset:2px; }

.app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- 見出し帯 ---------- */
.screen-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: calc(env(safe-area-inset-top, 0px) + var(--sp-3)) var(--sp-4) var(--sp-3);
  background: linear-gradient(180deg, rgba(10, 15, 36, .96), rgba(10, 15, 36, .88));
  border-bottom: 1px solid var(--c-navy-line);
  backdrop-filter: blur(6px);
}

.screen-header h1 {
  margin: 0;
  font-family: var(--f-display);
  font-size: 19px;
  letter-spacing: .12em;
  color: var(--c-gold-bright);
  text-shadow: 0 0 10px rgba(217, 180, 90, .35);
  flex: 1;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: 0 var(--sp-5);
  border-radius: var(--r-full);
  border: 1px solid var(--c-navy-line);
  background: var(--c-navy-2);
  color: var(--c-white);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  transition: transform .12s ease, filter .12s ease;
  box-shadow: var(--sh-inner);
}
.btn:active { transform: scale(.97); filter: brightness(1.15); }
.btn:focus-visible { outline: 2px solid var(--c-wisteria); outline-offset: 2px; }
.btn[disabled] { opacity: .4; pointer-events: none; }

.btn--gold {
  background: linear-gradient(180deg, var(--c-gold-bright), var(--c-gold) 55%, var(--c-gold-deep));
  color: #241a05;
  border: 1px solid var(--c-gold-bright);
  box-shadow: var(--sh-gold);
  text-shadow: 0 1px 0 rgba(255, 255, 255, .35);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-violet);
  color: var(--c-wisteria);
}

.btn--small { min-height: 36px; padding: 0 var(--sp-4); font-size: 13px; }

/* ---------- パネル ---------- */
.panel {
  background: linear-gradient(180deg, var(--c-navy-2), var(--c-navy));
  border: 1px solid var(--c-navy-line);
  border-radius: var(--r-m);
  box-shadow: var(--sh-panel), var(--sh-inner);
  padding: var(--sp-4);
}

.panel__title {
  margin: 0 0 var(--sp-3);
  font-family: var(--f-display);
  font-size: 15px;
  letter-spacing: .14em;
  color: var(--c-gold);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.panel__title::before {
  content: "";
  width: 10px; height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--c-wisteria) 45%, var(--c-violet));
  box-shadow: 0 0 8px rgba(185, 165, 232, .8);
}

/* ---------- ダイアログ ---------- */
.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(5, 8, 20, .72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-4);
}
.dialog {
  width: 100%;
  max-width: 360px;
  background: linear-gradient(180deg, var(--c-navy-2), var(--c-navy));
  border: 1px solid var(--c-gold-deep);
  border-radius: var(--r-l);
  box-shadow: 0 0 30px rgba(217, 180, 90, .25), var(--sh-panel);
  padding: var(--sp-5);
}
.dialog h2 {
  margin: 0 0 var(--sp-3);
  font-family: var(--f-display);
  font-size: 17px;
  letter-spacing: .12em;
  color: var(--c-gold-bright);
  text-align: center;
}
.dialog p { margin: 0 0 var(--sp-4); color: var(--c-dim); }
.dialog .dialog__actions {
  display: flex;
  gap: var(--sp-3);
}
.dialog .dialog__actions .btn { flex: 1; }

[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}