/* Shared layout styles for the Enhanced MPA shells. */

.hidden {
  display: none !important;
}

/* Accessibility: skip link */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 10000;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--primary-600);
  color: var(--text-inverse);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.15s var(--ease-out);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid var(--primary-200);
  outline-offset: 2px;
}

/* Sidebar */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.beta-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-700);
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  border-radius: 4px;
  padding: 2px 6px;
  line-height: 1.4;
  white-space: nowrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: #166534;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.5px;
}

.logo-text {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-800);
  line-height: 1;
}

.logo-text em {
  font-style: normal;
  color: #16a34a;
}

/* Dev tools logo variant */
.logo-mark.dev-mark {
  background: linear-gradient(135deg, var(--gray-700) 0%, var(--gray-500) 100%);
  font-size: 11px;
  letter-spacing: 0;
}

.dev-status {
  background: var(--gray-100);
  border-color: var(--gray-300);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--space-6);
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 10px 12px;
  border-radius: 8px;
  transition: all 0.15s var(--ease-out);
  color: var(--gray-600);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--gray-100);
  color: var(--gray-800);
}

.nav-item.active {
  background: var(--primary-50);
  color: var(--primary-800);
  border-color: var(--primary-200);
}

.nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s var(--ease-out);
}

.nav-icon.research {
  background: var(--primary-100);
  color: var(--primary-600);
}

.nav-icon.definition {
  background: var(--purple-100);
  color: var(--purple-600);
}

.nav-icon.section {
  background: var(--teal-100);
  color: var(--teal-600);
}

.nav-icon.compare {
  background: var(--warning-100);
  color: var(--warning-600);
}

.nav-icon.lab {
  background: var(--gray-100);
  color: var(--gray-600);
}

.nav-info {
  flex: 1;
  min-width: 0;
}

.nav-label {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-live-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #16a34a;
  margin-left: 4px;
  vertical-align: middle;
  position: relative;
  top: -1px;
}

.nav-desc {
  font-size: 11px;
  color: var(--gray-500);
  font-weight: 400;
}

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

.sidebar-updates-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  margin-bottom: var(--space-3);
  padding: 6px 8px;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-size: 11px;
  color: var(--gray-500);
  cursor: pointer;
  text-align: left;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.sidebar-updates-btn:hover {
  color: var(--primary-700);
  border-color: var(--primary-200);
  background: var(--primary-50);
}

.sidebar-updates-btn:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.corpus-status {
  background: var(--gray-50);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: var(--space-3);
}

.corpus-status-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.corpus-status-row:last-child {
  margin-bottom: 0;
}

.corpus-status-icon {
  color: var(--gray-500);
}

.corpus-status-label {
  font-size: 11px;
  color: var(--gray-500);
}

.corpus-status-value {
  font-size: 11px;
  color: var(--gray-700);
  font-weight: 500;
}

.corpus-status-link {
  font-size: 11px;
  color: var(--gray-700);
  font-weight: 500;
  text-decoration: none;
}

.corpus-status-link:hover {
  color: var(--primary-700);
  text-decoration: underline;
}

.sidebar-legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-3);
  font-size: 10px;
  color: var(--gray-400);
}

.sidebar-legal-links {
  display: flex;
  gap: 8px;
}

.sidebar-legal-links a {
  color: var(--gray-400);
  text-decoration: none;
}

.sidebar-legal-links a:hover {
  color: var(--gray-600);
  text-decoration: underline;
}

/* Toasts */
#toast-root {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 9999;
}

.toast {
  background: rgba(15, 23, 42, 0.92);
  color: var(--text-inverse);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 13px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
  max-width: 360px;
}

.toast-error {
  background: rgba(220, 38, 38, 0.92);
  border-color: rgba(255, 255, 255, 0.16);
}

.toast-info {
  background: rgba(15, 23, 42, 0.92);
}

/* Basic content helpers */
.content {
  padding: var(--space-6);
}

.coming-soon {
  max-width: 640px;
  margin: var(--space-8) auto;
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
}

/* ---- Mobile top bar — hidden on desktop ---- */
.mobile-top-bar { display: none; }

/* ---- Sidebar backdrop ---- */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 299;
}

/* ---- Mobile responsive shell (≤ 768 px) ---- */
@media (max-width: 768px) {
  /* Sidebar off-canvas: hidden off-screen by default */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 300;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  body.sidebar-open {
    overflow: hidden;
  }

  body.sidebar-open .sidebar-backdrop {
    display: block;
  }

  /* Main takes full width */
  .app {
    flex-direction: column;
  }

  /* Mobile top bar */
  .mobile-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    padding: 0 var(--space-4);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 200;
  }

  .mobile-top-bar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .mobile-logo {
    font-family: "Source Serif 4", Georgia, serif;
    font-size: 17px;
    font-weight: 600;
    color: var(--primary-800);
    text-decoration: none;
    line-height: 1;
  }

  .mobile-logo em {
    font-style: normal;
    color: #16a34a;
  }

  .mobile-back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    color: var(--gray-600);
    text-decoration: none;
    flex-shrink: 0;
  }

  .mobile-back-btn:hover {
    background: var(--gray-100);
    color: var(--gray-800);
  }

  .mobile-back-btn:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
  }

  .mobile-hamburger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--gray-600);
    cursor: pointer;
    padding: 0;
  }

  .mobile-hamburger:hover {
    background: var(--gray-100);
    color: var(--gray-800);
  }

  .mobile-hamburger:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
  }

  /* Hamburger ↔ X icon swap */
  .mobile-hamburger .icon-close { display: none; }
  body.sidebar-open .mobile-hamburger .icon-menu  { display: none; }
  body.sidebar-open .mobile-hamburger .icon-close { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  .sidebar { transition: none; }
}