/* 统一顶部导航样式；类名统一用 sh- 前缀，避免与账户页现有样式冲突。 */
.sh-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 74%, transparent);
}
.sh-brand {
  color: var(--ink);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0;
  text-decoration: none;
}
.sh-dot { color: var(--clay); }
.sh-nav { display: flex; gap: 6px; flex: 1; margin-left: 12px; }
.sh-nav a,
.sh-account {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.sh-nav a:hover,
.sh-account:hover { color: var(--clay-deep); background: var(--clay-soft); }
.sh-nav a[aria-current="page"] { color: var(--ink); font-weight: 500; }
.sh-account[data-state="user"] { color: var(--ink); font-weight: 500; border: 1px solid var(--line-2); }
.sh-actions { display: inline-flex; align-items: center; gap: 8px; }
.sh-bar a:focus-visible,
.sh-theme:focus-visible { outline: 2px solid var(--clay); outline-offset: 2px; }

.sh-theme {
  width: 54px;
  height: 30px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
}
.sh-theme-track { position: relative; width: 46px; height: 22px; display: block; }
.sh-theme-thumb {
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--clay-deep);
  box-shadow: 0 2px 8px rgba(60, 50, 38, .14);
  transition: transform .35s var(--spring), background-color .3s var(--ease), color .3s var(--ease);
}
.sh-theme svg { grid-area: 1 / 1; width: 13px; height: 13px; transition: opacity .25s var(--ease), transform .3s var(--spring); }
.sh-theme .moon { opacity: 0; transform: rotate(-25deg) scale(.78); }
.sh-theme[data-theme="dark"] .sh-theme-thumb { transform: translateX(24px); background: color-mix(in srgb, var(--card) 88%, #000); color: var(--clay); }
.sh-theme[data-theme="dark"] .sun { opacity: 0; transform: rotate(35deg) scale(.78); }
.sh-theme[data-theme="dark"] .moon { opacity: 1; transform: rotate(0) scale(1); }

@media (max-width: 480px) {
  .sh-bar { padding: 10px 14px; gap: 8px; }
  .sh-nav { margin-left: 0; }
  .sh-nav a, .sh-account { padding: 0 9px; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .sh-bar *, .sh-bar *::before, .sh-bar *::after { transition: none !important; }
}