/* Page shell: container, header, navigation, footer. */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.page {
  padding-block: var(--space-7);
}

.page-head {
  margin-bottom: var(--space-6);
}

.page-head p {
  max-width: 62ch;
}

.section {
  margin-top: var(--space-8);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text);
  margin-right: auto;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand-name {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-version {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Header search */

.header-search {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
}

.header-search-input {
  width: 150px;
  min-height: 42px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
}

.header-search-input::placeholder {
  color: var(--text-subtle);
}

.header-search-input:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.header-search-submit,
.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
}

.header-search-submit:hover,
.search-toggle:hover {
  background: var(--bg-muted);
}

.header-search-submit svg,
.search-toggle svg {
  width: 20px;
  height: 20px;
}

.search-toggle {
  display: none;
}

@media (max-width: 1149px) {
  .header-inner {
    position: relative;
  }

  .header-search {
    display: none;
  }

  .search-toggle {
    display: inline-flex;
  }

  .site-header.search-open .header-search {
    display: flex;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    z-index: 45;
    padding: var(--space-3) var(--space-4);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .site-header.search-open .header-search-input {
    flex: 1 1 auto;
    width: auto;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0;
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  background: none;
  border: 0;
  cursor: pointer;
  list-style: none;
}

.nav-link::-webkit-details-marker {
  display: none;
}

.nav-link:hover,
.nav-item > .nav-link:hover {
  color: var(--text);
  background: var(--bg-muted);
}

.nav-link[aria-current='page'],
.nav-item > .nav-link[aria-current='page'] {
  color: var(--text);
  background: var(--bg-muted);
}

.nav-group summary::after {
  content: '';
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.7;
}

.nav-sub {
  list-style: none;
  margin: 0;
  padding: var(--space-2);
  display: grid;
  gap: 2px;
  min-width: 240px;
}

.nav-sub-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-sub-link:hover,
.nav-sub-link[aria-current='page'] {
  color: var(--text);
  background: var(--bg-muted);
}

@media (min-width: 960px) {
  .nav-sub {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition:
      opacity var(--transition),
      transform var(--transition),
      visibility var(--transition);
  }

  .nav-group:hover .nav-sub,
  .nav-group:focus-within .nav-sub,
  .nav-group[open] .nav-sub {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  cursor: pointer;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: '';
  position: relative;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 4px;
}

@media (max-width: 959px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-4) var(--space-7);
    background: var(--bg);
    border-top: 1px solid var(--border);
    overflow-y: auto;
    transform: translateX(100%);
    visibility: hidden;
    transition:
      transform var(--transition-slow),
      visibility var(--transition-slow);
    z-index: 40;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-item {
    border-bottom: 1px solid var(--border);
  }

  .nav-item:last-child {
    border-bottom: 0;
  }

  .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: var(--space-3) var(--space-2);
    font-size: 1.05rem;
  }

  .nav-sub {
    padding: 0 0 var(--space-2) var(--space-4);
  }

  .nav-sub-link {
    padding: var(--space-2);
  }
}

/* Footer */

.site-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.footer-inner {
  display: grid;
  gap: var(--space-6);
  padding-block: var(--space-7);
}

@media (min-width: 760px) {
  .footer-inner {
    grid-template-columns: 1.2fr 1fr auto;
    align-items: start;
  }
}

.footer-brand {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 11px;
}

.footer-name {
  margin: 0 0 var(--space-1);
  font-weight: 700;
  color: var(--text);
}

.footer-text {
  margin: 0;
  font-size: 0.9rem;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2) var(--space-5);
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-nav a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer-social {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.footer-legal {
  border-top: 1px solid var(--border);
  padding-block: var(--space-4);
}

.footer-legal p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-subtle);
}