/* ============================================
   Layout — sidebar + topbar + content + mobile bottom-nav
   ============================================ */

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

/* === Sidebar === */
#sidebar {
  background: var(--color-dark);
  color: var(--color-cream);
  padding: var(--space-5) 0 var(--space-3);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: var(--z-sidebar);
}

.sidebar-brand {
  padding: 0 var(--space-5) var(--space-5);
  border-bottom: 1px solid rgba(255, 249, 240, 0.06);
}
.sidebar-brand .logo {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  letter-spacing: 0.22em;
  color: var(--color-gold);
  font-weight: 600;
}
.sidebar-brand .tagline {
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
  margin-top: var(--space-1);
  font-style: italic;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: var(--space-3);
}
.sidebar-nav li { margin: 2px 0; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  color: rgba(255, 249, 240, 0.72);
  font-size: var(--fs-sm);
  transition: var(--transition);
  position: relative;
}
.sidebar-nav a:hover {
  background: rgba(198, 166, 100, 0.08);
  color: var(--color-cream);
}
.sidebar-nav a.active {
  background: var(--color-gold);
  color: var(--color-dark);
  font-weight: 500;
}
.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: -8px; top: 8px; bottom: 8px;
  width: 3px;
  background: var(--color-gold);
  border-radius: var(--radius-full);
}
.sidebar-nav .badge-count {
  margin-left: auto;
  background: rgba(255, 249, 240, 0.1);
  color: var(--color-cream);
  font-size: 10px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 500;
}
.sidebar-nav a.active .badge-count {
  background: var(--color-dark);
  color: var(--color-gold);
}
.sidebar-nav .section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
  padding: var(--space-5) var(--space-3) var(--space-2);
  font-weight: 500;
}

/* === Main wrap === */
.main-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

/* === Topbar === */
#topbar {
  height: var(--topbar-h);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: var(--z-topbar);
  gap: var(--space-4);
}
.topbar-left {
  display: flex; align-items: center; gap: var(--space-3);
  flex: 1; min-width: 0;
}
.topbar-title {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  color: var(--color-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  flex: 1;
  max-width: 320px;
  margin-left: var(--space-4);
  cursor: pointer;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transition: var(--transition);
}
.topbar-search:hover { background: var(--color-cream-warm); }
.topbar-search kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 5px;
  background: var(--color-surface);
  border-radius: var(--radius-xs);
  border: 1px solid var(--color-border);
  margin-left: auto;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3) var(--space-1) var(--space-1);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: var(--transition);
}
.topbar-user:hover { background: var(--color-cream-warm); }

/* === View container === */
#view-container {
  flex: 1;
  padding: var(--space-6);
  /* clip (không phải hidden) để KHÔNG ép overflow-y:auto — giữ cửa sổ là vùng cuộn thật,
     nhờ đó position:sticky (thanh filter Dashboard, jump-nav) bám đúng đỉnh khi cuộn. */
  overflow-x: clip;
  overflow-y: visible;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
}

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
  flex-wrap: wrap;
}
.view-header > div { flex: 1; min-width: 0; }
.view-header .breadcrumb {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-2);
  font-weight: 500;
}
.view-header .breadcrumb a { color: var(--color-text-muted); }
.view-header .breadcrumb a:hover { color: var(--color-gold-dark); }
.view-header h1 { font-size: var(--fs-3xl); }
.view-header .subtitle {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  margin-top: var(--space-2);
}
.view-actions { display: flex; gap: var(--space-2); flex-shrink: 0; }

.loading {
  display: grid;
  place-items: center;
  height: 60vh;
  color: var(--color-text-muted);
}

/* === Grid helpers === */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* === Mobile bottom nav (<768px) === */
#bottom-nav { display: none; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  #app { grid-template-columns: 1fr; }
  #sidebar {
    position: fixed;
    left: -100%;
    width: 280px;
    transition: left var(--duration-base) var(--ease-out);
    z-index: 80;
  }
  #sidebar.open { left: 0; box-shadow: var(--shadow-xl); }
  #topbar { padding: 0 var(--space-4); }
  .topbar-search { display: none; }
  #view-container { padding: var(--space-4); padding-bottom: calc(var(--bottom-nav-h) + var(--space-4)); }

  .grid-2, .grid-3, .grid-4, .grid-6 { grid-template-columns: 1fr; }

  /* Bottom nav */
  #bottom-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: var(--bottom-nav-h);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    z-index: var(--z-topbar);
    padding-bottom: env(safe-area-inset-bottom);
  }
  #bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--color-text-muted);
    font-size: 10px;
    font-weight: 500;
    transition: var(--transition);
  }
  #bottom-nav a [data-lucide] { width: 22px; height: 22px; }
  #bottom-nav a.active { color: var(--color-gold-dark); }
  #bottom-nav a.active [data-lucide] { stroke-width: 2.25; }

  .view-header { flex-direction: column; align-items: flex-start; }
  .view-actions { width: 100%; flex-wrap: wrap; }
}

/* === Sidebar backdrop on mobile === */
#sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26,26,26,0.4);
  z-index: 70;
  opacity: 0;
  transition: opacity var(--transition);
}
#sidebar-backdrop.open { display: block; opacity: 1; }

/* === Tabs === */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  font-weight: 500;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.tab:hover { color: var(--color-dark); }
.tab.active { color: var(--color-dark); border-bottom-color: var(--color-gold); }