/* ==========================================
   Sidebar CSS — 側邊選單樣式
   ========================================== */

.sidebar {
  width: var(--sidebar-width);
  background: var(--card);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-right: 1px solid var(--card-border);
  box-shadow: 1px 0 4px rgba(0,0,0,.02);
}

.sidebar-header {
  padding: 20px var(--spacing-lg);
  border-bottom: 1px solid var(--card-border);
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
}

.sidebar-logo img {
  height: 32px;
  width: auto;
}

.sidebar-logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
}

.sidebar-logo-sub {
  font-size: .65rem;
  font-weight: 300;
  color: var(--ink-muted);
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--spacing-md) 0;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 9999px; }

.sidebar-section-title {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: .68rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-top: var(--spacing-md);
}

/* Navigation Item */
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px var(--spacing-lg);
  margin: 2px var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 400;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.nav-item:hover {
  background: var(--gold-glow);
  color: var(--ink);
}

.nav-item.active {
  background: var(--gold-glow);
  color: var(--ink);
  font-weight: 600;
  border-left: 3px solid var(--gold);
  padding-left: calc(var(--spacing-lg) - 3px);
}

/* Navigation Icon */
.nav-icon {
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.nav-icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Navigation Text & Badge */
.nav-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-badge {
  background: var(--gold);
  color: var(--ink);
  font-size: .68rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 9999px;
  min-width: 20px;
  text-align: center;
}

/* Divider */
.sidebar-divider {
  height: 1px;
  background: var(--card-border);
  margin: var(--spacing-md) var(--spacing-lg);
}

/* Sidebar History Section */
.sidebar-history {
  border-top: 1px solid var(--card-border);
  padding: var(--spacing-md) 0;
  max-height: 280px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px var(--spacing-lg);
  margin: 1px var(--spacing-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.history-item:hover { background: var(--parchment); }

.history-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--parchment-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: .72rem;
}

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

.history-title {
  font-size: .78rem;
  font-weight: 500;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-meta {
  font-size: .68rem;
  color: var(--ink-muted);
  font-weight: 300;
}

/* Sidebar Footer */
.sidebar-footer {
  border-top: 1px solid var(--card-border);
  padding: var(--spacing-sm) var(--spacing-md);
  flex-shrink: 0;
}

.sidebar-footer .nav-item {
  margin: 0;
}

.sidebar-footer .nav-item:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
}