.app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width 0.22s ease;
}

/* ── Sidebar collapse toggle button ─────────────────────────────────────── */
.sidebar-collapse-btn {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  padding: 4px 6px;
  border-radius: 6px;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
.sidebar-collapse-btn:hover { color: var(--text-muted); background: var(--bg-surface-2); }

/* ── Collapsed state ─────────────────────────────────────────────────────── */
.sidebar.collapsed {
  width: var(--sidebar-collapsed-w);
}

/* Brand area: hide text, keep logo + toggle stacked */
.sidebar.collapsed .sidebar-brand-text { display: none; }
.sidebar.collapsed .sidebar-brand {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0 8px;
  gap: 6px;
}
.sidebar.collapsed .sidebar-collapse-btn { margin: 0; }

/* Nav items: icon-only centered */
.sidebar.collapsed .sidebar-nav { padding: 12px 8px; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 11px; }
.sidebar.collapsed .nav-label { display: none; }
.sidebar.collapsed .nav-item.active { background: var(--green-900); }

/* Quota block: compact count + bar only */
.sidebar.collapsed .sidebar-quota {
  padding: 10px 8px;
  text-align: center;
}
.sidebar.collapsed .quota-label,
.sidebar.collapsed .quota-value,
.sidebar.collapsed .quota-note,
.sidebar.collapsed .quota-upgrade { display: none; }
.sidebar.collapsed .quota-compact { display: block; }

/* User: avatar + plan pill, stacked */
.sidebar.collapsed .user-info,
.sidebar.collapsed .logout-link { display: none; }
.sidebar.collapsed .sidebar-user {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  gap: 6px;
}

/* Logo link (wraps SVG in brand area) */
.sidebar-logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

/* Compact quota count shown only when sidebar collapsed */
.quota-compact {
  display: none;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
}

/* Sidebar brand */
.sidebar-brand {
  padding: 22px 18px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-eyebrow {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.09em;
  line-height: 1;
}
.sidebar-name {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

/* Sidebar nav */
.sidebar-nav {
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-input);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover { background: var(--bg-surface-2); color: var(--text-body); }
.nav-item.active { background: var(--green-900); color: var(--green-mint); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-pro-badge { margin-left: auto; font-size: 10px; padding: 2px 6px; }
.sidebar.collapsed .nav-pro-badge { display: none; }

/* Nav sub-item (indented child) */
.nav-item--sub { padding-left: 20px; font-size: 12.5px; }
.sidebar.collapsed .nav-item--sub { padding-left: 11px; }

/* Nav group (admin submenu) */
.nav-group { display: flex; flex-direction: column; gap: 2px; }

.nav-group-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-input);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}
.nav-group-header:hover { background: var(--bg-surface-2); color: var(--text-body); }
.nav-group-header.active { color: var(--green-mint); }
.nav-group-header svg:first-child { width: 18px; height: 18px; flex-shrink: 0; }

/* Chevron arrow */
.nav-group-chevron {
  width: 14px;
  height: 14px;
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  transform: rotate(180deg); /* up = open by default */
}
.nav-group--open .nav-group-chevron { transform: rotate(180deg); }
.nav-group:not(.nav-group--open) .nav-group-chevron { transform: rotate(0deg); }

/* Submenu: hidden when group closed */
.nav-submenu {
  display: none;
  flex-direction: column;
  gap: 1px;
  padding-left: 14px;
  margin-top: 2px;
}
.nav-group--open .nav-submenu { display: flex; }

.nav-subitem {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--r-input);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none !important;
  transition: background 0.15s, color 0.15s;
}
.nav-subitem:hover { background: var(--bg-surface-2); color: var(--text-body); }
.nav-subitem.active { background: var(--green-900); color: var(--green-mint); }

/* Collapsed sidebar: ẩn sub-items và label, căn giữa icon */
.sidebar.collapsed .nav-group-header {
  justify-content: center;
  padding: 11px;
}
.sidebar.collapsed .nav-group-header .nav-label,
.sidebar.collapsed .nav-group-chevron { display: none; }
.sidebar.collapsed .nav-submenu { display: none !important; }

/* Sidebar quota block */
.sidebar-quota {
  border-top: 1px solid var(--border-subtle);
  padding: 14px 18px;
}
.quota-label { font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.quota-value { font-size: 12.5px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.quota-bar { height: 6px; background: var(--bg-surface-2); border-radius: 99px; overflow: hidden; margin-bottom: 6px; }
.quota-fill { height: 100%; background: linear-gradient(90deg, var(--green), var(--green-light)); border-radius: 99px; transition: width 0.3s; }
.quota-note { font-size: 11.5px; color: var(--text-dim); margin-bottom: 8px; }
.quota-upgrade {
  display: block;
  text-align: center;
  background: linear-gradient(90deg, var(--gold), var(--gold-end));
  color: var(--gold-ink);
  font-size: 12.5px;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: var(--r-input);
  text-decoration: none;
}

/* Sidebar user footer */
.sidebar-user {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #065f46, var(--green));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}
.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.plan-pill {
  display: inline-block;
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--r-pill);
}
.plan-pill--free { background: var(--bg-surface-2); color: var(--text-muted); }
.plan-pill--pro  { background: linear-gradient(90deg, var(--gold), var(--gold-end)); color: var(--gold-ink); }
.logout-link { font-size: 11.5px; color: var(--text-dim); text-decoration: none; white-space: nowrap; }
.logout-link:hover { color: var(--text-muted); }

/* Main content */
.main-content {
  flex: 1;
  overflow-y: auto;
  height: 100vh;
  padding: 28px 34px 48px;
}

/* Mobile bottom tab bar */
.tab-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--tabbar-h);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  z-index: 100;
  justify-content: space-around;
  align-items: stretch;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: 10.5px;
  font-weight: 600;
  transition: color 0.15s;
}
.tab-item.active { color: var(--green); }
.tab-item svg { width: 20px; height: 20px; }

/* Page header */
.page-header { margin-bottom: 24px; }
.page-header h1 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.page-header p { font-size: 14px; color: var(--text-muted); }

@media (max-width: 900px) {
  .sidebar { display: none; }
  .tab-bar { display: flex; }
  .main-content { padding: 20px 14px 104px; }
}

/* ── Centered layout (pricing, etc.) ────────────────────────────────────── */
.main-content--centered {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.main-content--centered > * { width: 100%; }

/* ── Custom scrollbar (green accent) ─────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); border-radius: 99px; }
::-webkit-scrollbar-thumb { background: #1a5c42; border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--green); }
* { scrollbar-width: thin; scrollbar-color: #1a5c42 var(--bg-surface); }