/* ==========================================================================
   Layout: container, header, navigation, footer, page heads
   ========================================================================== */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container--narrow {
  max-width: calc(760px + 2 * var(--gutter));
}

.container--mid {
  max-width: calc(960px + 2 * var(--gutter));
}

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
  }
}

.section {
  padding: var(--space-6) 0;
}

.section--tight {
  padding: var(--space-5) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.section-head .label {
  display: block;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.stack > * + * {
  margin-top: var(--space-3);
}

.stack-lg > * + * {
  margin-top: var(--space-5);
}

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

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-5);
  align-items: start;
}

@media (max-width: 960px) {
  .split {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Announcement bar
   -------------------------------------------------------------------------- */

.announce {
  background: var(--surface-raised);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 20px;
}

.announce .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding-top: 9px;
  padding-bottom: 9px;
  text-align: center;
}

.announce a {
  color: var(--text);
  font-weight: 600;
}

.signal-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal-lime);
}

[data-theme="skylight"] .signal-dot {
  background: var(--sunset-orange);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: var(--header-h);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex: none;
  margin-left: -10px;
  border-radius: var(--radius-md);
}

/* The wordmark files carry their own clear space; never below 160px wide. */
.wordmark {
  height: 44px;
  width: auto;
  min-width: 160px;
}

.wordmark--expo {
  min-width: 200px;
}

.theme-dusk-only,
[data-theme="skylight"] .theme-skylight-only {
  display: block;
}

.theme-skylight-only,
[data-theme="skylight"] .theme-dusk-only {
  display: none;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-right: auto;
}

.primary-nav a,
.header-actions .icon-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: color var(--quick) var(--ease), background var(--quick) var(--ease);
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-raised);
}

.primary-nav a[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--accent);
}

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

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--quick) var(--ease), background var(--quick) var(--ease);
}

.icon-button:hover {
  color: var(--text);
  background: var(--surface-raised);
}

.header-actions .icon-button {
  padding: 0;
  width: 40px;
  justify-content: center;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 8px;
  border-radius: var(--radius-pill);
  background: var(--signal-lime);
  color: var(--dusk-ink);
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.18em;
  line-height: 16px;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.live-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dusk-ink);
  animation: live-pulse 2.4s ease-in-out infinite;
}

@keyframes live-pulse {
  50% {
    opacity: 0.35;
  }
}

/* Account menu */
.menu {
  position: relative;
}

.menu > summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: var(--radius-md);
}

.menu > summary::-webkit-details-marker {
  display: none;
}

.menu > summary:hover {
  background: var(--surface-raised);
}

.menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 240px;
  padding: var(--space-2);
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  animation: fade-up 300ms var(--ease) both;
}

.menu__head {
  padding: 10px 12px 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}

.menu__head strong {
  display: block;
  line-height: 22px;
}

.menu__panel a,
.menu__panel button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--text);
  font-size: 15px;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.menu__panel a:hover,
.menu__panel button:hover {
  background: var(--surface-hover);
}

.menu__panel .icon {
  color: var(--text-muted);
}

.menu__divider {
  height: 1px;
  margin: 6px 0;
  background: var(--line);
}

/* Mobile navigation */
.header-actions .nav-toggle {
  display: none;
}

.mobile-nav {
  display: none;
}

@media (max-width: 900px) {
  .primary-nav {
    display: none;
  }

  .header-actions .nav-toggle {
    display: inline-flex;
  }

  .header-actions {
    margin-left: auto;
  }

  .header-actions .hide-mobile {
    display: none;
  }

  .mobile-nav[data-open="true"] {
    display: block;
    border-top: 1px solid var(--line);
    padding: var(--space-2) 0 var(--space-3);
    animation: fade-up 300ms var(--ease) both;
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px var(--gutter);
    color: var(--text);
    font-weight: 600;
    text-decoration: none;
  }

  .mobile-nav a[aria-current="page"] {
    color: var(--accent);
  }

  .mobile-nav .icon {
    color: var(--text-muted);
  }
}

@media (max-width: 420px) {
  .wordmark {
    height: 38px;
  }

  .site-header .container {
    gap: var(--space-2);
  }

  .live-badge span {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Messages
   -------------------------------------------------------------------------- */

.messages {
  position: fixed;
  z-index: 60;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: grid;
  gap: var(--space-2);
  width: min(560px, calc(100vw - 32px));
  margin: 0;
  padding: 0;
  list-style: none;
}

.message {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--surface-raised);
  box-shadow: var(--shadow-panel);
  animation: fade-up var(--fade) var(--ease) both;
  font-weight: 600;
  line-height: 22px;
}

.message--error,
.message--warning {
  border-left-color: var(--sunset-orange);
}

.message--success {
  border-left-color: var(--atrium-teal);
}

.message p {
  margin: 0;
  flex: 1;
}

.message .icon-button {
  width: 28px;
  height: 28px;
  margin: -3px -6px -3px 0;
}

.message[data-leaving] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: var(--space-6);
  border-top: 1px solid var(--line);
  background: var(--surface-sunken);
  padding: var(--space-6) 0 var(--space-5);
  font-size: 15px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: var(--space-5);
}

.footer-brand .wordmark {
  height: 52px;
  margin: -8px 0 0 -12px;
}

.footer-brand .descriptor {
  margin: 4px 0 var(--space-3);
  font-size: 12px;
}

.footer-col h2 {
  margin-bottom: var(--space-3);
  color: var(--text-muted);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--text);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-credit {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 18px;
}

.footer-base {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 13px;
}

.footer-base a {
  color: var(--text-muted);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* --------------------------------------------------------------------------
   Breadcrumbs and page heads
   -------------------------------------------------------------------------- */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--line-strong);
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--text);
}

.page-head {
  padding: var(--space-5) 0 var(--space-4);
}

.page-head h1 {
  margin-bottom: var(--space-2);
}

.page-head p {
  max-width: 680px;
  color: var(--text-muted);
}

.page-head__row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}