:root {
  --bg: #fbf7f0;
  --bg-2: #f4eadc;
  --fg: #342b28;
  --muted: #756862;
  --card: rgba(255,255,255,0.72);
  --border: rgba(82,57,45,0.13);
  --accent: #b76e5d;
  --accent-2: #d9a76b;
  --shadow: 0 18px 50px rgba(98,66,47,0.12);
  --radius: 22px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "SF Pro Text", Segoe UI, Roboto, Noto Sans, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial;
}

/* Theme previews: ?theme=ivory (default), ?theme=blossom, ?theme=midnight */
html[data-theme='blossom'] {
  --bg: #fdf4f3;
  --bg-2: #f5dddb;
  --fg: #402c31;
  --muted: #80656b;
  --card: rgba(255,255,255,0.76);
  --border: rgba(133,72,83,0.14);
  --accent: #bb6575;
  --accent-2: #e3a17d;
  --shadow: 0 18px 50px rgba(130,72,83,0.13);
}

html[data-theme='midnight'] {
  --bg: #171b2b;
  --bg-2: #26223a;
  --fg: #fff8f1;
  --muted: #c9bdc1;
  --card: rgba(39,35,57,0.76);
  --border: rgba(255,242,231,0.14);
  --accent: #e5a1a8;
  --accent-2: #e9c285;
  --shadow: 0 22px 55px rgba(5,7,17,0.4);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--fg);
  background: radial-gradient(1100px 700px at 90% -10%, color-mix(in srgb, var(--accent-2) 27%, transparent), transparent 62%),
              radial-gradient(900px 680px at 2% 95%, color-mix(in srgb, var(--accent) 17%, transparent), transparent 64%),
              linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  letter-spacing: 0.2px;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 64px 16px 40px;
}

.page {
  width: min(980px, 100%);
  display: grid;
  gap: 16px;
  align-content: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: saturate(1.15) blur(12px);
  -webkit-backdrop-filter: saturate(1.15) blur(12px);
  padding: 20px;
}

.site-links {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 20;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.site-links-right {
  position: fixed;
  top: 16px;
  right: 120px;
  z-index: 20;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.site-link {
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 84%, transparent);
  padding: 9px 13px;
  border-radius: 999px;
  font-weight: 650;
  letter-spacing: .2px;
  transition: background .2s ease, transform .15s ease, border-color .2s ease;
  box-shadow: var(--shadow);
}

.site-link:hover,
.site-link[aria-current='page'] {
  background: color-mix(in srgb, var(--accent) 14%, var(--card));
  transform: translateY(-1px);
  border-color: color-mix(in lab, var(--accent), #fff 25%);
}

.site-menu-panel {
  display: contents;
}

.site-menu-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 21;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 84%, transparent);
  padding: 9px 12px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .2px;
  transition: background .2s ease, transform .15s ease, border-color .2s ease;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.site-menu-toggle:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-1px);
  border-color: color-mix(in lab, var(--accent), #fff 25%);
}

.lang-switch {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 20;
}

.lang-toggle {
  appearance: none;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 84%, transparent);
  border-radius: 999px;
  cursor: pointer;
  padding: 4px;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  width: 84px;
  height: 36px;
  box-shadow: var(--shadow);
  transition: border-color .2s ease;
}

.lang-toggle:hover {
  border-color: color-mix(in lab, var(--accent), #fff 25%);
}

.lang-option {
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .3px;
  color: var(--muted);
  transition: color .2s ease;
  z-index: 1;
}

.lang-option.active {
  color: var(--fg);
}

.lang-slider {
  position: absolute;
  top: 4px;
  left: 4px;
  width: calc(50% - 4px);
  height: 28px;
  background: var(--accent);
  border-radius: 999px;
  transition: transform .2s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.lang-slider.zh {
  transform: translateX(0);
}

.lang-slider.en {
  transform: translateX(100%);
}

@media (max-width: 860px) {
  .site-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-links,
  .site-links-right {
    display: none;
    position: static;
    gap: 8px;
    flex-direction: column;
  }

  .site-menu-panel {
    display: none;
    position: fixed;
    top: 62px;
    left: 16px;
    right: 16px;
    z-index: 24;
    border: 1px solid var(--border);
    background: color-mix(in lab, var(--bg-2), var(--accent) 8%);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 10px;
    gap: 10px;
  }

  body.site-menu-open .site-menu-panel {
    display: grid;
  }

  body.site-menu-open .site-links,
  body.site-menu-open .site-links-right {
    display: flex;
  }
}

@media (max-width: 520px) {
  .wrap { padding: 76px 14px 28px; }
  .card { border-radius: 18px; padding: 16px; }
  .site-links-right { right: auto; }
}