/* ============================================================
   太陽系シミュレーター UI — ダークグラス HUD
   ============================================================ */
:root {
  --accent: #7dd3fc;
  --panel: rgba(10, 16, 26, 0.62);
  --panel-border: rgba(140, 180, 220, 0.14);
  --text: #dce8f5;
  --text-dim: #8fa3b8;
  --glass-blur: blur(14px) saturate(1.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #000104;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Yu Gothic", system-ui, sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

#view { position: fixed; inset: 0; display: block; touch-action: none; }

/* ---------- ラベル ---------- */
#labels { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 5; }
.label {
  position: absolute; top: 0; left: 0;
  display: flex; align-items: center; gap: 6px;
  padding: 3px 10px 3px 7px;
  font-size: 12px; letter-spacing: 0.08em;
  color: rgba(220, 232, 245, 0.85);
  background: rgba(8, 14, 24, 0.45);
  border: 1px solid rgba(140, 180, 220, 0.12);
  border-radius: 999px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  pointer-events: auto; cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  white-space: nowrap;
  will-change: transform;
}
.label:hover { background: rgba(30, 50, 75, 0.75); border-color: rgba(125, 211, 252, 0.5); }
.label.sel { border-color: var(--accent); color: #fff; }
.label.small { font-size: 10.5px; opacity: 0.85; }
.l-dot { width: 6px; height: 6px; border-radius: 50%; flex: none; }

.grid-label {
  position: absolute; top: 0; left: 0;
  font-size: 10px; letter-spacing: 0.1em;
  color: rgba(120, 160, 190, 0.7);
  pointer-events: none;
  will-change: transform;
}

/* ---------- ブランド ---------- */
#brand { position: fixed; top: 22px; left: 26px; z-index: 10; pointer-events: none; }
#brand h1 {
  font-size: 17px; font-weight: 600; letter-spacing: 0.34em;
  color: rgba(230, 240, 250, 0.92);
  text-shadow: 0 0 24px rgba(125, 211, 252, 0.35);
}
#brand p {
  margin-top: 4px;
  font-size: 9px; letter-spacing: 0.42em; color: var(--text-dim);
}

/* ---------- 惑星ナビ ---------- */
#nav {
  position: fixed; left: 22px; top: 50%; transform: translateY(-50%);
  z-index: 10;
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 8px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  max-height: 76vh; overflow-y: auto;
  scrollbar-width: none;
}
#nav::-webkit-scrollbar { display: none; }
.nav-item {
  display: flex; align-items: center; gap: 9px;
  padding: 6px 14px 6px 10px;
  background: none; border: none; border-radius: 10px;
  color: var(--text-dim);
  font-size: 12.5px; letter-spacing: 0.12em;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  text-align: left;
}
.nav-item:hover { background: rgba(125, 211, 252, 0.10); color: var(--text); }
.nav-item.active { background: rgba(125, 211, 252, 0.16); color: #fff; }
.nav-item.indent { padding-left: 24px; font-size: 11.5px; }
.nav-item .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; box-shadow: 0 0 8px currentColor; }

/* ---------- トグル ---------- */
#toggles {
  position: fixed; top: 22px; right: 24px; z-index: 10;
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end;
  max-width: 46vw;
}
.toggle {
  padding: 7px 14px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 11.5px; letter-spacing: 0.1em;
  font-family: inherit;
  cursor: pointer;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.18s;
}
.toggle:hover { border-color: rgba(125, 211, 252, 0.45); color: var(--text); }
.toggle.on { color: var(--accent); border-color: rgba(125, 211, 252, 0.55); box-shadow: inset 0 0 12px rgba(125, 211, 252, 0.08); }
.help-btn { width: 32px; padding: 7px 0; text-align: center; }

/* ---------- 時間バー ---------- */
#timebar {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  z-index: 10;
  display: flex; align-items: center; gap: 18px;
  padding: 10px 20px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  white-space: nowrap;
}
.tb-group { display: flex; gap: 4px; }
#timebar button {
  min-width: 36px; height: 34px;
  padding: 0 10px;
  background: rgba(125, 211, 252, 0.06);
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font-size: 13px; font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
#timebar button:hover { background: rgba(125, 211, 252, 0.16); border-color: rgba(125, 211, 252, 0.3); }
#btn-play.paused { color: var(--accent); }
#btn-reverse.on { color: var(--accent); border-color: rgba(125, 211, 252, 0.4); }
#btn-now { font-size: 11.5px; letter-spacing: 0.12em; color: var(--text-dim); }
.tb-speed {
  min-width: 108px; text-align: center;
  font-size: 12.5px; letter-spacing: 0.08em; color: var(--accent);
}
.tb-date { display: flex; flex-direction: column; align-items: center; min-width: 150px; }
#date-main { font-size: 15px; letter-spacing: 0.1em; font-weight: 600; }
#date-sub { font-size: 10.5px; color: var(--text-dim); letter-spacing: 0.12em; margin-top: 1px; }

/* ---------- 情報パネル ---------- */
#info {
  position: fixed; top: 76px; right: 24px; z-index: 9;
  width: 320px; max-height: calc(100vh - 200px);
  overflow-y: auto;
  padding: 22px 22px 16px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  opacity: 0; transform: translateX(24px);
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  scrollbar-width: thin;
}
#info.show { opacity: 1; transform: none; pointer-events: auto; }
#info .close {
  position: absolute; top: 10px; right: 12px;
  width: 28px; height: 28px;
  background: none; border: none;
  color: var(--text-dim); font-size: 18px;
  cursor: pointer; border-radius: 8px;
}
#info .close:hover { color: #fff; background: rgba(125, 211, 252, 0.12); }
.i-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
.i-head h2 { font-size: 24px; font-weight: 600; letter-spacing: 0.16em; }
.i-head .en { font-size: 11px; color: var(--text-dim); letter-spacing: 0.22em; text-transform: uppercase; }
#info .desc { font-size: 12px; line-height: 1.85; color: #b8c8d8; margin-bottom: 14px; }
.stats .r, .live .r {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 6px 2px;
  border-bottom: 1px solid rgba(140, 180, 220, 0.08);
  font-size: 12px;
}
.stats .r span, .live .r span { color: var(--text-dim); letter-spacing: 0.06em; }
.stats .r b, .live .r b { font-weight: 500; text-align: right; font-variant-numeric: tabular-nums; }
.live { margin-top: 10px; padding: 4px 10px; background: rgba(125, 211, 252, 0.05); border: 1px solid rgba(125, 211, 252, 0.14); border-radius: 10px; }
.live .r { border-bottom: none; }
.live .r b { color: var(--accent); }
.follow-note { margin-top: 12px; font-size: 10px; color: var(--text-dim); text-align: center; letter-spacing: 0.08em; }

/* ---------- トースト ---------- */
#toast {
  position: fixed; bottom: 92px; left: 50%; transform: translate(-50%, 8px);
  z-index: 20;
  padding: 10px 22px;
  background: rgba(12, 20, 32, 0.85);
  border: 1px solid rgba(125, 211, 252, 0.3);
  border-radius: 999px;
  font-size: 12px; letter-spacing: 0.08em;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  max-width: 80vw; text-align: center;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- イントロ ---------- */
#intro {
  position: fixed; inset: 0; z-index: 40;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, rgba(0, 2, 8, 0.25) 0%, rgba(0, 1, 4, 0.88) 100%);
  transition: opacity 1.4s ease;
  pointer-events: none;
}
#intro.hide { opacity: 0; }
.intro-inner { text-align: center; animation: introFade 2s ease both; }
.intro-inner h2 { font-size: 30px; font-weight: 600; letter-spacing: 0.5em; text-indent: 0.5em; text-shadow: 0 0 40px rgba(125, 211, 252, 0.5); }
.intro-inner .sub { margin-top: 12px; font-size: 10px; letter-spacing: 0.55em; color: var(--text-dim); }
.intro-inner .hint { margin-top: 38px; font-size: 11.5px; letter-spacing: 0.2em; color: #9fb4c8; }
@keyframes introFade { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ---------- ヘルプ ---------- */
#help-overlay {
  position: fixed; inset: 0; z-index: 50;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 2, 8, 0.7);
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
#help-overlay.show { opacity: 1; pointer-events: auto; }
.help-card {
  width: min(430px, 88vw);
  padding: 30px 34px;
  background: rgba(12, 20, 34, 0.92);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
}
.help-card h3 { font-size: 16px; letter-spacing: 0.3em; margin-bottom: 18px; color: var(--accent); }
.keys div { display: flex; align-items: center; gap: 14px; padding: 5px 0; font-size: 12.5px; }
.keys kbd {
  min-width: 74px; text-align: center;
  padding: 3px 8px;
  background: rgba(125, 211, 252, 0.08);
  border: 1px solid rgba(125, 211, 252, 0.25);
  border-radius: 6px;
  font-family: inherit; font-size: 11px; letter-spacing: 0.06em;
}
.keys span { color: #b8c8d8; }
.help-card .credit { margin-top: 20px; font-size: 10px; line-height: 1.8; color: var(--text-dim); }

/* ---------- モバイル ---------- */
@media (max-width: 760px) {
  #brand h1 { font-size: 13px; letter-spacing: 0.22em; }
  #nav { left: 10px; padding: 6px 4px; }
  .nav-item { padding: 4px 8px; font-size: 11px; }
  #toggles { max-width: 60vw; gap: 5px; }
  .toggle { padding: 5px 9px; font-size: 10px; }
  #timebar { bottom: 12px; gap: 8px; padding: 8px 10px; max-width: 96vw; overflow-x: auto; }
  .tb-date { min-width: 110px; }
  #date-main { font-size: 12px; }
  .tb-speed { min-width: 76px; font-size: 10.5px; }
  #info { top: auto; bottom: 76px; right: 10px; width: min(320px, calc(100vw - 20px)); max-height: 46vh; }
}