/* ---------- 背景 / Layout / Hero ---------- */
.bg{ position:fixed; inset:0; z-index:-1; background:linear-gradient(180deg,var(--bg-start),var(--bg-end)); }
.container{ width:min(980px,92%); margin:0 auto; }
main.container{
  padding-bottom:120px;
  padding-bottom:calc(120px + env(safe-area-inset-bottom, 0px));
}

.hero{ padding:42px 0 20px; }
.topbar{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  margin-bottom:20px;
  border-radius:28px;
  border:1px solid var(--topbar-border);
  background:
    linear-gradient(140deg,
      var(--topbar-bg-1) 0%,
      var(--topbar-bg-2) 100%);
  box-shadow:0 36px 80px rgba(0,0,0,.26);
  backdrop-filter:saturate(160%) blur(22px);
  -webkit-backdrop-filter:saturate(160%) blur(22px);
  overflow:visible;
  z-index:80;
  isolation:isolate;
  color:var(--topbar-ink);
}
.topbar::after{
  content:"";
  position:absolute;
  inset:1px;
  border-radius:inherit;
  background:linear-gradient(120deg, rgba(255,255,255,.22), rgba(255,255,255,.04));
  mix-blend-mode:soft-light;
  pointer-events:none;
  opacity:.9;
}
.brand{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding:8px 12px 8px 8px;
  border-radius:20px;
  background:var(--brand-bg);
  color:var(--brand-ink);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.24), 0 12px 28px rgba(0,0,0,.18);
}
.brand::after{
  content:"2025";
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:2px 10px;
  border-radius:999px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.3px;
  background:var(--brand-tag-bg);
  border:1px solid var(--brand-tag-border);
  color:var(--brand-tag-ink);
  filter:drop-shadow(0 4px 10px rgba(0,0,0,.18));
}
.logo{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border-radius:16px;
  font-weight:900;
  letter-spacing:.6px;
  font-size:18px;
  color:color-mix(in oklab, #fff 92%, var(--accent-1) 8%);
  text-shadow:0 1px 4px rgba(0,0,0,.24);
  background:linear-gradient(135deg,
    color-mix(in oklab, var(--accent-1) 82%, var(--ink) 18%) 0%,
    color-mix(in oklab, var(--accent-2) 82%, var(--ink) 18%) 100%);
  box-shadow:0 16px 34px color-mix(in oklab, var(--accent-2) 30%, rgba(0,0,0,.75) 70%), inset 0 1px 0 rgba(255,255,255,.28);
}
.ver{ font-size:12px; opacity:.85; }
.actions{
  position:relative;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  padding:6px 8px;
  border-radius:20px;
  border:1px solid color-mix(in oklab, var(--panel-border) 60%, var(--accent-2) 40%);
  background:linear-gradient(160deg,
    color-mix(in oklab, var(--surface) 72%, var(--accent-2) 28%) 0%,
    color-mix(in oklab, var(--surface-strong) 82%, var(--accent-1) 18%) 100%);
  box-shadow:0 20px 46px rgba(0,0,0,.22);
  color:var(--topbar-ink);
}
.actions::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:radial-gradient(circle at top left, rgba(255,255,255,.34) 0%, rgba(255,255,255,0) 65%);
  pointer-events:none;
  mix-blend-mode:soft-light;
}
.tip{
  background:rgba(17,17,17,.82);
  color:#fff;
  border-radius:10px;
  padding:6px 10px;
  font-size:12px;
  box-shadow:0 12px 26px rgba(0,0,0,.28);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.gear, .help-btn, .lang-btn{
  position:relative;
  appearance:none;
  border:0;
  background:linear-gradient(150deg,
      var(--topbar-icon-bg-1) 0%,
      var(--topbar-icon-bg-2) 100%);
  border:1px solid var(--topbar-icon-border);
  width:40px;
  height:40px;
  border-radius:14px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  line-height:1;
  color:var(--topbar-icon-ink);
  font-size:20px;
  box-shadow:0 16px 32px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.28);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, filter .18s ease;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.gear::after, .help-btn::after, .lang-btn::after{
  content:"";
  position:absolute;
  inset:2px;
  border-radius:inherit;
  border:1px solid rgba(255,255,255,.18);
  pointer-events:none;
}
.gear:hover, .help-btn:hover, .lang-btn:hover{
  transform:translateY(-1px);
  box-shadow:0 20px 44px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.34);
  filter:saturate(1.05);
}
.gear:active, .help-btn:active, .lang-btn:active{ transform:translateY(0); }
.gear:focus-visible, .help-btn:focus-visible, .lang-btn:focus-visible{ outline:2px solid var(--ring); outline-offset:2px; }
.help-btn{ font-size:18px; }
.lang-menu{
  position:absolute; top:60px; right:68px; z-index:45;
  min-width:180px; padding:12px;
  border-radius:14px;
  border:1px solid var(--panel-border); background:var(--panel); color:var(--ink);
  box-shadow:0 16px 40px rgba(0,0,0,.26);
}
.lang-menu[hidden]{ display:none; }
.lang-item{
  display:flex; align-items:center; justify-content:space-between;
  width:100%; padding:8px 12px; margin:0;
  border:0; border-radius:10px; background:transparent; cursor:pointer;
  color:inherit; font-weight:600; font-size:14px;
  transition:background .18s ease, transform .18s ease;
}
.lang-item.active{
  background:color-mix(in oklab, var(--panel) 85%, var(--accent-2) 15%);
}
.lang-item[aria-checked="true"]::after{
  content:"✓";
  font-size:14px;
}
.lang-item:hover{
  background:color-mix(in oklab, var(--panel) 78%, var(--accent-2) 22%);
  transform:translateY(-1px);
}
.lang-item:focus-visible{
  outline:2px solid var(--ring);
  outline-offset:2px;
}
.hero-title{
  margin:18px 0 6px; font-size:clamp(28px,6vw,56px); line-height:1.04;
  background: var(--hero-title-bg); -webkit-background-clip:text; background-clip:text;
  color: var(--hero-title-color);
}
.sub{ color:color-mix(in oklab, var(--text) 88%, var(--muted) 12%); }
.hero .chip{
  margin-left:8px;
  background:color-mix(in oklab, var(--panel) 78%, var(--accent-2) 22%);
  border-color:color-mix(in oklab, var(--panel-border) 72%, var(--accent-2) 28%);
  color:color-mix(in oklab, var(--ink) 88%, var(--accent-1) 12%);
}

html[data-faction="dark"] .hero .chip{
  background:color-mix(in oklab, var(--panel) 88%, var(--accent-2) 12%);
  border-color:color-mix(in oklab, var(--panel-border) 82%, var(--accent-2) 18%);
  color:#000;
}

@media (max-width:860px){
  .topbar{ padding:14px 16px; border-radius:26px; }
  .brand{ gap:12px; }
  .actions{ gap:10px; }
}

@media (max-width:720px){
  .topbar{ flex-wrap:wrap; align-items:center; gap:10px; }
  .actions{ width:auto; margin-left:auto; justify-content:flex-end; }
  .brand::after{ margin-left:auto; }
}

@media (max-width:520px){
  .topbar{ padding:12px 14px; }
  .brand{
    padding:0;
    background:none;
    border:0;
    box-shadow:none;
  }
  .brand::after{
    font-size:10px;
    padding:0 6px;
    background:none;
    border:0;
    box-shadow:none;
    filter:none;
  }
  .actions{
    padding:0;
    border-radius:18px;
    background:none;
    border:0;
    box-shadow:none;
  }
  .gear, .help-btn, .lang-btn{ width:38px; height:38px; }
}

/* ---------- Theme menu（含三切） ---------- */
.theme-menu{
  position:absolute; top:60px; right:20px; z-index:40;
  width:min(360px,92vw); max-height:70vh; overflow:auto;
  padding:12px; border-radius:16px;
  border:1px solid var(--panel-border); background:var(--panel); color:var(--ink);
  box-shadow:0 20px 50px rgba(0,0,0,.30);
}
.theme-menu[hidden]{ display:none; }
.mode-tabs{ display:flex; gap:6px; margin-bottom:8px; }
.mode-tabs [role=tab]{
  flex:1; padding:8px 10px; border-radius:10px; border:1px solid var(--panel-border); background:var(--panel); cursor:pointer;
  color:var(--ink); font-weight:700; font-size:12px;
}
.mode-tabs [role=tab].active{ background: color-mix(in oklab, var(--panel) 75%, var(--accent-2) 25%); outline:1px solid var(--panel-border); }
.mode-tabs [role=tab]:focus-visible{ outline:2px solid var(--ring); }
.section{ margin-top:8px; }
.section-title{ font-size:12px; color:var(--muted); margin:6px 4px; }
.theme-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:6px; }
.theme-item{
  display:flex; align-items:center; gap:8px; padding:8px; border-radius:10px; background:var(--panel);
  border:1px solid var(--panel-border); cursor:pointer; font-weight:600; color:inherit; -webkit-text-fill-color:currentColor;
}
.theme-item[aria-checked="true"]{ outline:2px solid var(--ring); }
.theme-item:hover{ background: color-mix(in oklab, var(--panel) 85%, var(--accent-2) 15%); }
.swatch{ width:18px; height:18px; border-radius:6px; border:1px solid var(--panel-border); }
.voice-settings-section{ margin-top:14px; padding-top:12px; border-top:1px solid var(--panel-border); }
.voice-settings-section details{ display:block; }
.voice-settings-section summary{
  cursor:pointer;
  font-size:12px;
  color:var(--muted);
  margin:6px 4px;
  font-weight:600;
  list-style:none;
}
.voice-settings-section summary::-webkit-details-marker{ display:none; }
.voice-settings-section summary:focus-visible{ outline:2px solid var(--ring); border-radius:6px; }
.voice-settings-section details[open] > summary{ margin-bottom:4px; }
.voice-settings{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:8px 10px 10px;
  border-radius:12px;
  background:color-mix(in oklab, var(--panel) 82%, var(--accent-2) 18%);
  border:1px solid color-mix(in oklab, var(--panel-border) 70%, var(--accent-2) 30%);
}
.voice-presets{ display:flex; flex-wrap:wrap; gap:6px; }
.voice-settings label{ font-size:12px; font-weight:600; color:var(--ink); }
.voice-range{ display:flex; align-items:center; gap:6px; }
.voice-range input{
  flex:1;
  border-radius:8px;
  border:1px solid var(--panel-border);
  background:var(--panel);
  color:var(--ink);
  padding:6px 8px;
  font-size:13px;
}
.voice-settings.is-auto .voice-range,
.voice-settings.is-auto .voice-range input,
.voice-settings.is-auto #pitchRangeReset{ opacity:0.55; }
.voice-settings.is-auto .voice-range input{ pointer-events:none; }
.voice-settings.is-auto #pitchRangeReset{ pointer-events:none; }
.menu-inline-btn[aria-pressed="true"]{
  background:color-mix(in oklab, var(--panel) 55%, var(--accent-2) 45%);
  border-color:color-mix(in oklab, var(--panel-border) 30%, var(--accent-2) 70%);
}
.voice-range input:focus-visible{ outline:2px solid var(--ring); outline-offset:2px; }
.range-sep{ font-weight:600; color:var(--muted); }
.menu-inline-btn{
  align-self:flex-start;
  padding:6px 12px;
  border-radius:8px;
  border:1px solid var(--panel-border);
  background:color-mix(in oklab, var(--panel) 75%, var(--accent-2) 25%);
  font-weight:600;
  font-size:12px;
  cursor:pointer;
  color:var(--ink);
}
.menu-inline-btn:hover{ background:color-mix(in oklab, var(--panel) 60%, var(--accent-2) 40%); }
.menu-inline-btn:focus-visible{ outline:2px solid var(--ring); outline-offset:2px; }
.menu-actions{ margin-top:12px; padding-top:12px; border-top:1px solid var(--panel-border); display:flex; flex-direction:column; gap:8px; }
.menu-action{
  display:flex; align-items:center; justify-content:center; gap:6px; padding:10px;
  border-radius:10px; border:1px solid var(--panel-border); cursor:pointer; font-weight:600;
  background: color-mix(in oklab, var(--panel) 78%, var(--accent-2) 22%);
  color: inherit; -webkit-text-fill-color: currentColor;
}
.menu-action:hover{ background: color-mix(in oklab, var(--panel) 60%, var(--accent-2) 40%); }
.menu-action:focus-visible{ outline:2px solid var(--ring); outline-offset:2px; }
.menu-hint{ margin:0; font-size:12px; color: var(--muted); }
.swatch--warm{ background:linear-gradient(135deg,#f6a6c1,#f6c28b); }
.swatch--lavender{ background:linear-gradient(135deg,#c9a7ff,#9bb8ff); }
.swatch--peach{ background:linear-gradient(135deg,#ffb4a2,#ffd6a5); }
.swatch--ink{ background:linear-gradient(135deg,#a3b8ff,#9ee0ff); }
.swatch--day{ background:linear-gradient(135deg,#f0abfc,#7dd3fc); }
.swatch--night{ background:linear-gradient(135deg,#c084fc,#22d3ee); }
.swatch--contrast{ background:linear-gradient(135deg,#000,#fff); }
.swatch--slate{ background:linear-gradient(135deg,#93c5fd,#a78bfa); }
.swatch--graphite{ background:linear-gradient(135deg,#9ca3af,#60a5fa); }
.swatch--sand{ background:linear-gradient(135deg,#e9c46a,#f4a261); }
.swatch--latte{ background:linear-gradient(135deg,#d6a56b,#f2c08c); }
.swatch--clay{ background:linear-gradient(135deg,#c27c59,#e1b07b); }
.swatch--rose{ background:linear-gradient(135deg,#f472b6,#fb7185); }
.swatch--blush{ background:linear-gradient(135deg,#f59aba,#ffd1e5); }
.swatch--coral{ background:linear-gradient(135deg,#ff9776,#ffd08a); }
.swatch--amber{ background:linear-gradient(135deg,#fbbf24,#f59e0b); }
.swatch--gold{ background:linear-gradient(135deg,#f0d264,#f5c979); }
.swatch--cocoa{ background:linear-gradient(135deg,#b98068,#dba17f); }
.swatch--olive{ background:linear-gradient(135deg,#a3c76d,#d1e29a); }
.swatch--emerald{ background:linear-gradient(135deg,#10b981,#34d399); }
.swatch--teal{ background:linear-gradient(135deg,#14b8a6,#2dd4bf); }
.swatch--aqua{ background:linear-gradient(135deg,#67e8f9,#22d3ee); }
.swatch--cyan{ background:linear-gradient(135deg,#22d3ee,#06b6d4); }
.swatch--sky{ background:linear-gradient(135deg,#7dd3fc,#38bdf8); }
.swatch--azure{ background:linear-gradient(135deg,#60a5fa,#3b82f6); }
.swatch--cobalt{ background:linear-gradient(135deg,#818cf8,#6366f1); }
.swatch--indigo{ background:linear-gradient(135deg,#a78bfa,#8b5cf6); }
.swatch--violet{ background:linear-gradient(135deg,#c084fc,#a855f7); }
.swatch--grape{ background:linear-gradient(135deg,#e879f9,#d946ef); }
.swatch--plum{ background:linear-gradient(135deg,#f0abfc,#e879f9); }
.swatch--magenta{ background:linear-gradient(135deg,#fb7185,#f472b6); }
.swatch--fuchsia{ background:linear-gradient(135deg,#f0abfc,#f472b6); }