/* ── App Shell ─────────────────────────────────────────────────────────────
   Sidebar, topbar, mobile topbar, bottom tabs, drawer, scrim.
   Three responsive modes: desktop (≥1280), tablet (768–1279), phone (<768).
   ──────────────────────────────────────────────────────────────────────── */

/* ── Desktop shell ───────────────────────────────────────────────────── */

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
}

/* ── Sidebar ─────────────────────────────────────────────────────────── */

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: var(--bg-2);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 18px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.wordmark:hover { text-decoration: none; }

.wordmark .mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--saffron), var(--redwood) 120%);
  box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--charcoal) 40%, transparent);
  flex-shrink: 0;
}

/* Search pill in sidebar */
.search-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin: 2px 6px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--ease-default);
}
.search-pill:hover { border-color: var(--line-2); }
.search-pill .kbd {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--text-mute);
}

/* Nav sections and items */
.nav-section {
  margin-top: 16px;
  padding: 0 10px 4px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 8px 12px;
  margin: 1px 4px;
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--text-dim);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--ease-default), color var(--ease-default);
}
.nav-item:hover {
  background: var(--bg-3);
  color: var(--text);
  text-decoration: none;
}
.nav-item.active {
  background: var(--accent-soft);
  color: var(--text);
}
.nav-item .ic {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: .7;
}
.nav-item.active .ic {
  opacity: 1;
  color: var(--accent);
}
.nav-item .count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
}

/* Sidebar footer */
.nav-foot {
  margin-top: auto;
  padding: 16px 10px 6px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-dim);
}

.avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--saffron), var(--rust));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 12px;
  flex-shrink: 0;
}

/* ── Main area ───────────────────────────────────────────────────────── */

.main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: color-mix(in oklch, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
  padding: 12px 36px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.crumbs {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-mute);
  display: flex;
  align-items: center;
  gap: 8px;
}
.crumbs b { color: var(--text); font-weight: 500; }
.crumbs .sep { opacity: .5; }
.crumbs a { color: var(--text-mute); }
.crumbs a:hover { color: var(--text); text-decoration: none; }

.topbar .spacer { flex: 1; }

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--ease-default), color var(--ease-default);
}
.icon-btn:hover {
  background: var(--bg-3);
  color: var(--text);
}

/* Page content area */
.page {
  padding: 40px 56px 120px;
  max-width: 1360px;
}
.page.narrow {
  max-width: 1040px;
}
.page.wide {
  max-width: none;
}

/* ── Mobile top bar (phone only) ─────────────────────────────────────── */

.mobile-topbar {
  display: none;
}

/* ── Bottom tabs (phone only) ────────────────────────────────────────── */

.bottom-tabs {
  display: none;
}

/* ── Drawer (phone only) ─────────────────────────────────────────────── */

.drawer-scrim {
  display: none;
  position: fixed;
  inset: 0;
  background: color-mix(in oklch, var(--charcoal) 40%, transparent);
  z-index: 90;
}
.drawer-scrim.open { display: block; }

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 84vw;
  max-width: 360px;
  background: var(--bg-2);
  border-left: 1px solid var(--line);
  z-index: 91;
  transform: translateX(100%);
  transition: transform var(--ease-drawer);
  overflow-y: auto;
  padding: 22px 18px;
}
.drawer.open {
  transform: translateX(0);
}

/* ── Sidebar collapse toggle ─────────────────────────────────────────── */

.sidebar-collapse-btn {
  all: unset;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin: 8px auto 0;
  cursor: pointer;
  color: var(--text-mute);
  border-radius: 6px;
  transition: background 0.15s;
}
.sidebar-collapse-btn:hover { background: var(--bg-2); color: var(--text); }

/* Collapsed sidebar (icon-only rail) — same styles as tablet */
.app.sidebar-collapsed {
  grid-template-columns: var(--sidebar-rail) 1fr;
}
.app.sidebar-collapsed .sidebar {
  padding: 16px 10px;
  align-items: center;
}
.app.sidebar-collapsed .wordmark span { display: none; }
.app.sidebar-collapsed .search-pill { padding: 10px; margin: 2px 0 14px; justify-content: center; }
.app.sidebar-collapsed .search-pill span { display: none; }
.app.sidebar-collapsed .search-pill .kbd { display: none; }
.app.sidebar-collapsed .nav-section { display: none; }
.app.sidebar-collapsed .nav-item { justify-content: center; padding: 10px; margin: 1px 0; }
.app.sidebar-collapsed .nav-item span { display: none; }
.app.sidebar-collapsed .nav-item .count { display: none; }
.app.sidebar-collapsed .nav-foot span { display: none; }
.app.sidebar-collapsed .nav-foot { justify-content: center; padding: 16px 0 6px; }
.app.sidebar-collapsed .sidebar-collapse-btn svg { transform: rotate(180deg); }

/* Side player with collapsed sidebar */
.app.sidebar-collapsed.has-side-player {
  grid-template-columns: var(--sidebar-rail) 1fr var(--side-player-width, 380px);
}

/* ── Tablet (768–1279px) ─────────────────────────────────────────────── */

@media (min-width: 768px) and (max-width: 1279px) {
  .app {
    grid-template-columns: var(--sidebar-rail) 1fr;
  }

  .sidebar {
    padding: 16px 10px;
    align-items: center;
  }

  .wordmark span { display: none; }
  .search-pill { padding: 10px; margin: 2px 0 14px; justify-content: center; }
  .search-pill span { display: none; }
  .search-pill .kbd { display: none; }

  .nav-section { display: none; }
  .nav-item {
    justify-content: center;
    padding: 10px;
    margin: 1px 0;
  }
  .nav-item span { display: none; }
  .nav-item .count { display: none; }

  .nav-foot span { display: none; }
  .nav-foot { justify-content: center; padding: 16px 0 6px; }

  .topbar { padding: 12px 24px; }
  .page { padding: 28px 32px 120px; }
}

/* ── Phone (<768px) ──────────────────────────────────────────────────── */

@media (max-width: 767px) {
  .app {
    display: block;
  }

  .sidebar { display: none; }
  .topbar { display: none; }

  .mobile-topbar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 80;
    backdrop-filter: blur(14px);
    background: color-mix(in oklch, var(--bg) 94%, transparent);
    border-top: 1px solid var(--line);
    padding: 10px 18px calc(10px + env(safe-area-inset-bottom, 0px));
    align-items: center;
    gap: 12px;
  }
  .mobile-topbar .page-title {
    flex: 1;
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 500;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Bottom tabs removed — mobile-topbar now at bottom */
  .bottom-tabs {
    display: none !important;
  }
  .tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 0;
    min-height: 48px;
    justify-content: center;
    font-family: var(--font-ui);
    font-size: 10px;
    color: var(--text-mute);
    cursor: pointer;
    text-decoration: none;
  }
  .tab-item:hover { text-decoration: none; }
  .tab-item.active {
    color: var(--accent);
  }
  .tab-item .tab-icon {
    width: 22px;
    height: 22px;
  }

  .page {
    padding: 22px 18px 140px;
  }
}

/* ── Annotations hidden — global nav suppression ─────────────────────── */
[data-annotations="hide"] a[href="/comments"] { display: none !important; }