/**
 * PivCSS 全站顶栏 — 对齐官网 navbar-st（元舟 PivArk）
 * 演示页 + 文档站 topbar 共用
 */

.pvs-site-nav {
  --psn-height: 4.5rem;
  --psn-border: var(--pvs-border-color, #e2e8f0);
  position: sticky;
  top: 0;
  z-index: var(--pvs-z-sticky, 1020);
  background: color-mix(in srgb, var(--pvs-surface, #fff) 92%, transparent);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid var(--psn-border);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--pvs-body-bg, #fff) 80%, transparent);
}

.pvs-site-nav__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  min-height: var(--psn-height);
  padding-block: 0.5rem;
}

/* ── Brand ── */
.pvs-site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--pvs-body-color, #0f172a);
  flex: 0 0 auto;
  min-width: 0;
}

.pvs-site-nav__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--pvs-primary, #2563eb) 0%, color-mix(in srgb, var(--pvs-primary, #2563eb) 55%, #7c3aed) 100%);
  border-radius: 0.65rem;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--pvs-primary, #2563eb) 28%, transparent);
}

.pvs-site-nav__logo-char {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

.pvs-site-nav__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.pvs-site-nav__brand-text strong {
  font-weight: 800;
}

.pvs-site-nav__brand-text small {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--pvs-muted-color, #64748b);
  letter-spacing: 0.02em;
}

/* ── Menu ── */
.pvs-site-nav__menu {
  display: flex;
  width: 100%;
  flex-basis: 100%;
  flex-direction: column;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    max-height 0.25s ease,
    opacity 0.2s ease,
    padding-top 0.2s ease;
}

.pvs-site-nav__menu.pvs-nav-open {
  max-height: min(80vh, 24rem);
  opacity: 1;
  pointer-events: auto;
  padding-top: 0.5rem;
}

.pvs-site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pvs-site-nav__item {
  position: relative;
}

.pvs-site-nav__link {
  display: block;
  padding: 0.7rem 0.85rem;
  font-size: 0.96875rem;
  font-weight: 500;
  color: var(--pvs-gray-700, #374151);
  text-decoration: none;
  background: transparent;
  position: relative;
  pointer-events: auto;
  cursor: pointer;
}

.pvs-site-nav__link::after {
  content: '';
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.4rem;
  height: 2px;
  border-radius: 1px;
  background: var(--pvs-primary, #2563eb);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.22s ease;
}

.pvs-site-nav__link:hover,
.pvs-site-nav__link:focus-visible,
.pvs-site-nav__item.is-active > .pvs-site-nav__link {
  color: var(--pvs-primary, #2563eb);
  background: transparent;
}

.pvs-site-nav__link:hover::after,
.pvs-site-nav__link:focus-visible::after,
.pvs-site-nav__item.is-active > .pvs-site-nav__link::after {
  transform: scaleX(1);
}

/* ── Toolbar ── */
.pvs-site-nav__toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  flex-basis: 100%;
  padding-top: 0.5rem;
  margin-top: 0.25rem;
  border-top: 1px solid var(--psn-border);
}

.pvs-site-nav__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  color: var(--pvs-gray-600, #4b5563);
  background: var(--pvs-surface-muted, #f8fafc);
  border: 1px solid var(--psn-border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.pvs-site-nav__icon-btn:hover {
  color: var(--pvs-primary, #2563eb);
  border-color: color-mix(in srgb, var(--pvs-primary, #2563eb) 35%, var(--psn-border));
  background: color-mix(in srgb, var(--pvs-primary, #2563eb) 8%, var(--pvs-surface-muted, #f8fafc));
}

.pvs-site-nav__icon-btn:focus-visible {
  outline: 2px solid var(--pvs-primary, #2563eb);
  outline-offset: 2px;
}

.pvs-site-nav__svg {
  display: block;
}

.pvs-site-nav__download {
  flex-shrink: 0;
  white-space: nowrap;
}

/* ── Mobile toggle ── */
.pvs-site-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-left: auto;
  padding: 0;
  font-size: 1.125rem;
  color: var(--pvs-body-color, #0f172a);
  background: var(--pvs-surface-muted, #f8fafc);
  border: 1px solid var(--psn-border);
  border-radius: 0.5rem;
  cursor: pointer;
}

.pvs-site-nav__toggle:focus-visible {
  outline: 2px solid var(--pvs-primary, #2563eb);
  outline-offset: 2px;
}

/* ── Mobile 顶栏一行：品牌 | 主题 | 汉堡（toolbar 勿占满宽换行） ── */
@media (max-width: 991px) {
  .pvs-site-nav__brand {
    order: 1;
    flex: 1 1 auto;
    min-width: 0;
  }

  .pvs-site-nav__toolbar {
    order: 2;
    width: auto;
    flex: 0 0 auto;
    flex-basis: auto;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .pvs-site-nav__toggle {
    order: 3;
    margin-left: 0;
  }

  .pvs-site-nav__menu {
    order: 4;
  }
}

/* ── Desktop ── */
@media (min-width: 992px) {
  .pvs-site-nav__inner {
    flex-wrap: nowrap;
    gap: 1rem;
  }

  .pvs-site-nav__toggle {
    display: none;
  }

  .pvs-site-nav__menu {
    display: flex !important;
    width: auto;
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    max-height: none !important;
    opacity: 1 !important;
    overflow: visible;
    pointer-events: auto !important;
    padding-top: 0;
    margin-left: auto;
  }

  .pvs-site-nav__list {
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    gap: 0.15rem;
  }

  .pvs-site-nav__link {
    padding: 0.85rem 0.9rem;
    white-space: nowrap;
  }

  .pvs-site-nav__toolbar {
    width: auto;
    flex: 0 0 auto;
    flex-basis: auto;
    margin-left: 0;
    padding-top: 0;
    margin-top: 0;
    padding-left: 0.85rem;
    border-top: 0;
    border-left: 1px solid var(--psn-border);
  }
}

/* ── 文档站 topbar 变体 ── */
.pvs-site-nav--docs .pvs-site-nav__inner {
  padding-inline: 1.25rem;
}

.pvs-site-nav--docs .pvs-docs__topbar-start {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-width: 0;
  flex: 0 1 auto;
  max-width: 12rem;
}

.pvs-site-nav--docs .pvs-docs__topbar-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--docs-muted, var(--pvs-muted-color));
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 960px) {
  .pvs-site-nav--docs .pvs-site-nav__menu {
    display: none !important;
  }

  .pvs-site-nav--docs .pvs-docs__nav-toggle {
    display: inline-flex;
  }
}

@media (min-width: 961px) {
  .pvs-site-nav--docs .pvs-docs__nav-toggle {
    display: none;
  }

  .pvs-site-nav--docs .pvs-docs__topbar-title {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pvs-site-nav__menu,
  .pvs-site-nav__link::after {
    transition: none;
  }
}

html[data-pvs-theme='dark'] .pvs-site-nav {
  background: color-mix(in srgb, var(--pvs-surface, #1e293b) 94%, transparent);
}

html[data-pvs-theme='dark'] .pvs-site-nav__link {
  color: var(--pvs-gray-300, #d1d5db);
}