/* AI 小游戏门户 · 组件样式（纯 CSS，零 WebFont，暗色优先） */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-game-bg);
  color: var(--color-foreground);
  font-family: var(--font-sans);
  font-size: calc(16px * var(--font-scale));
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
:focus-visible { outline: 2px solid var(--color-game-primary); outline-offset: 2px; border-radius: 4px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--color-accent); color: #fff; padding: 8px 16px; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ── Header ── */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--color-background) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header-inner {
  max-width: 1200px; margin: 0 auto; height: var(--header-h);
  display: flex; align-items: center; gap: var(--space-4);
  padding: 0 var(--space-4);
}
.brand { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-foreground); font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center; width: 32px; height: 32px;
  border-radius: var(--radius-sm); background: var(--color-game-primary-strong); color: #fff;
  font-size: 13px; font-weight: 700; letter-spacing: .02em;
}
.site-nav { display: flex; gap: var(--space-4); margin-left: var(--space-4); }
.site-nav a { color: var(--color-muted-foreground); font-weight: 500; }
.site-nav a:hover { color: var(--color-foreground); text-decoration: none; }
.site-actions { margin-left: auto; display: flex; align-items: center; gap: var(--space-2); }
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: transparent; color: var(--color-muted-foreground); cursor: pointer;
}
.icon-btn:hover { color: var(--color-foreground); border-color: var(--color-muted-foreground); }
.portal-link {
  font-size: 14px; color: var(--color-muted-foreground);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 8px 12px; white-space: nowrap;
}
.portal-link:hover { color: var(--color-foreground); text-decoration: none; }

/* ── Layout ── */
.site-main { flex: 1; width: 100%; max-width: 1200px; margin: 0 auto; padding: var(--space-8) var(--space-4) var(--space-16); }
.section { margin-top: var(--space-12); }
.section-title { font-size: 20px; color: var(--color-muted-foreground); font-weight: 600; margin: 0 0 var(--space-4); }
.hero { padding: var(--space-8) 0 var(--space-4); border-bottom: 1px solid var(--color-border); }
.hero h1 { font-size: clamp(32px, 5vw, 48px); margin: 0 0 var(--space-3); font-family: var(--font-display); }
.hero-sub { font-size: 18px; color: var(--color-muted-foreground); margin: 0; }

/* ── Game cards ── */
.game-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }
.game-card {
  display: flex; flex-direction: column; gap: var(--space-4);
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-6);
  min-height: 280px; transition: transform var(--dur-fade) var(--ease-story), box-shadow var(--dur-fade) var(--ease-story);
}
.game-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.game-card.is-active { border-color: var(--color-accent); }
.game-card.is-coming { opacity: .65; }
.game-card-icon { color: var(--color-accent); height: 72px; display: flex; align-items: center; }
.game-card-icon svg { width: 44px; height: 44px; }
.game-card-icon.large svg { width: 64px; height: 64px; }
.game-card-body h3 { margin: var(--space-2) 0; font-size: 20px; }
.game-card-body p { margin: 0; color: var(--color-muted-foreground); font-size: 14px; }
.game-card-foot { margin-top: auto; display: flex; flex-direction: column; gap: var(--space-3); }
.game-card-meta { font-size: 13px; color: var(--color-muted-foreground); }
.game-card-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.chip {
  display: inline-block; background: var(--color-muted); color: var(--color-muted-foreground);
  border-radius: 999px; padding: 4px 10px; font-size: 13px;
}
.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 10px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: var(--color-card); color: var(--color-foreground);
  font-size: 15px; font-weight: 500; cursor: pointer; font-family: inherit; text-align: center;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-game-primary-strong); border-color: var(--color-game-primary-strong); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--color-game-primary-soft); }
.btn-disabled { opacity: .5; cursor: not-allowed; }
.btn-lg { min-height: 52px; padding: 12px 28px; font-size: 16px; }

/* ── Detail / prose ── */
.game-detail, .prose-page { max-width: 68ch; margin: 0 auto; }
.game-detail-head { text-align: center; margin-bottom: var(--space-8); }
.game-detail-head .meta { color: var(--color-muted-foreground); }
.prose-block { margin-top: var(--space-8); }
.prose-block h2, .prose-page h2 { font-size: 18px; color: var(--color-muted-foreground); }
.prose-block ul, .prose-page ul { padding-left: var(--space-6); }
.prose-block li, .prose-page li { margin: var(--space-1) 0; }
.cta-row { margin-top: var(--space-8); display: flex; justify-content: center; }
.about-strip { max-width: 68ch; color: var(--color-muted-foreground); }
.radio-row { display: flex; flex-wrap: wrap; gap: var(--space-6); }
.radio-row label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.hint { color: var(--color-muted-foreground); font-size: 14px; }
.notfound { text-align: center; padding: var(--space-16) var(--space-4); }
.notfound h1 { font-family: var(--font-display); font-size: 40px; }

/* ── Footer / bottom nav ── */
.site-footer { border-top: 1px solid var(--color-border); background: var(--color-card); }
.site-footer-inner {
  max-width: 1200px; margin: 0 auto; padding: var(--space-6) var(--space-4);
  display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between;
  color: var(--color-muted-foreground); font-size: 14px;
}
.site-footer-inner nav { display: flex; gap: var(--space-4); }
.bottom-nav { display: none; }

/* ── Loom game ── */
.loom-app { max-width: 720px; margin: 0 auto; }
.loom-fallback, .loom-noscript { text-align: center; color: var(--color-muted-foreground); padding: var(--space-12) 0; }
.loom-top {
  position: sticky; top: var(--header-h); z-index: 20;
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) 0; margin-bottom: var(--space-4);
  background: color-mix(in srgb, var(--color-background) 92%, transparent);
  backdrop-filter: blur(6px); border-bottom: 1px solid var(--color-border);
}
.loom-title { font-weight: 600; }
.loom-progress { margin-left: auto; color: var(--color-muted-foreground); font-size: 14px; font-variant-numeric: tabular-nums; }
.story-panel {
  background: var(--color-game-panel); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-8);
}
.story-meta { color: var(--color-muted-foreground); font-size: 13px; letter-spacing: .02em; }
.story-text { font-size: calc(17px * var(--font-scale)); line-height: 1.85; letter-spacing: .01em; margin: var(--space-4) 0 var(--space-6); min-height: 5em; }
.story-text.typing::after { content: '▍'; color: var(--color-game-primary); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.choices { display: flex; flex-direction: column; gap: var(--space-4); }
.choice-btn {
  display: flex; align-items: center; gap: var(--space-3);
  width: 100%; min-height: 56px; padding: 12px 16px; text-align: left;
  background: var(--color-card); color: var(--color-foreground);
  border: 1px solid var(--color-border); border-left: 3px solid transparent;
  border-radius: var(--radius-sm); font-size: calc(16px * var(--font-scale));
  font-weight: 500; cursor: pointer; font-family: inherit;
  transition: background var(--dur-fade), border-color var(--dur-fade), transform 120ms;
}
.choice-btn:hover { background: var(--color-game-primary-soft); border-left-color: var(--color-game-primary); }
.choice-btn:active { transform: scale(.98); }
.choice-btn:disabled { opacity: .5; cursor: not-allowed; }
.choice-num { color: var(--color-game-primary); font-weight: 700; }
.loom-hint { margin-top: var(--space-4); display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; color: var(--color-muted-foreground); font-size: 14px; }
.ghost-btn { border: 1px solid var(--color-border); background: transparent; color: var(--color-muted-foreground); border-radius: var(--radius-sm); padding: 6px 12px; font-size: 14px; cursor: pointer; font-family: inherit; }
.ghost-btn:hover { color: var(--color-foreground); }

/* skeleton */
.skeleton { padding: var(--space-4) 0; }
.skeleton-line { height: 14px; border-radius: 7px; background: var(--color-game-state-loading); opacity: .15; margin-bottom: 12px; animation: breathe var(--dur-skeleton) ease-in-out infinite; }
.skeleton-line.w80 { width: 80%; }
.skeleton-line.w60 { width: 60%; }
.skeleton-line.w40 { width: 40%; }
@keyframes breathe { 0%, 100% { opacity: .1; } 50% { opacity: .28; } }
.skeleton-hint { text-align: center; color: var(--color-muted-foreground); font-size: 14px; margin: var(--space-4) 0 var(--space-2); }
.skeleton-choices .skeleton-line { height: 44px; border-radius: var(--radius-sm); }

/* ending */
.loom-ending { margin-top: var(--space-8); border-top: 1px solid var(--color-border); padding-top: var(--space-6); }
.ending-title { font-family: var(--font-display); font-size: 24px; margin: 0 0 var(--space-2); }
.loom-commentary { color: var(--color-muted-foreground); }
.score-row { display: flex; align-items: center; gap: var(--space-3); margin: var(--space-2) 0; }
.score-label { width: 4em; color: var(--color-muted-foreground); font-size: 14px; }
.stars { letter-spacing: 2px; font-size: 20px; color: var(--color-muted); }
.star.on { color: var(--color-game-accent-warm); }
.score-num { color: var(--color-muted-foreground); font-size: 14px; font-variant-numeric: tabular-nums; }
.loom-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }

/* setup */
.loom-setup h1 { font-family: var(--font-display); }
.setup-field { margin-top: var(--space-6); }
.setup-field h2 { font-size: 16px; color: var(--color-muted-foreground); }
.setup-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.choice-chip {
  border: 1px solid var(--color-border); background: var(--color-card); color: var(--color-foreground);
  border-radius: 999px; padding: 8px 16px; cursor: pointer; font-family: inherit; font-size: 15px;
}
.choice-chip[aria-pressed='true'] { border-color: var(--color-game-primary); background: var(--color-game-primary-soft); color: var(--color-foreground); }
.setup-input {
  width: 100%; max-width: 320px; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: var(--color-card); color: var(--color-foreground);
  font-family: inherit; font-size: 15px;
}

/* toast / banner */
.loom-toast {
  position: fixed; left: 50%; top: 16px; transform: translateX(-50%);
  background: var(--color-card); border: 1px solid var(--color-border); color: var(--color-foreground);
  border-radius: var(--radius-sm); padding: 10px 16px; box-shadow: var(--shadow-md); z-index: 50; font-size: 14px;
}
.banner { padding: 10px 16px; font-size: 14px; display: flex; gap: var(--space-3); align-items: center; border-radius: var(--radius-sm); margin-bottom: var(--space-4); }
.banner-warn { background: #78350f; color: #FEF3C7; }
.banner-error { background: var(--color-destructive); color: #fff; }
.banner button { margin-left: auto; background: transparent; border: 1px solid currentColor; color: inherit; border-radius: 4px; cursor: pointer; font-family: inherit; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .site-main { padding: var(--space-6) var(--space-4) 96px; }
  .game-card { min-height: 240px; padding: var(--space-4); }
  .story-panel { padding: var(--space-6) var(--space-4); border-radius: var(--radius-md); }
  .choice-btn { min-height: 52px; }
  .site-nav { display: none; }
  .portal-link { display: none; }
  .site-footer { display: none; }
  .bottom-nav {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
    background: color-mix(in srgb, var(--color-background) 94%, transparent);
    backdrop-filter: blur(8px); border-top: 1px solid var(--color-border);
    padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
  }
  .bottom-nav-item { flex: 1; text-align: center; padding: 10px 0; color: var(--color-muted-foreground); font-size: 14px; }
  .bottom-nav-item.is-active { color: var(--color-accent); font-weight: 600; }
  .loom-top { top: var(--header-h); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .story-text.typing::after { animation: none; }
}