/* ============================================================
   COMPONENTS — Website Học Tập Đại Học
   ============================================================ */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: var(--leading-none);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  height: 40px;
}

.btn:focus-visible {
  box-shadow: var(--shadow-focus);
}

.btn:active {
  transform: scale(0.98);
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-800);
  border-color: var(--color-primary-800);
}

/* Secondary (shadcn-style: muted background, dark text) */
.btn-secondary {
  background: var(--muted, var(--bg-tertiary));
  color: var(--foreground, var(--text-primary));
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--color-neutral-200);
  border-color: var(--border-color-strong);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color-strong);
}

.btn-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-tertiary);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Accent (Destructive / CTA) */
.btn-accent {
  background: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

.btn-accent:hover {
  background: var(--color-secondary-600);
  border-color: var(--color-secondary-600);
}

/* Success */
.btn-success {
  background: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.btn-success:hover {
  background: var(--color-success-700);
  border-color: var(--color-success-700);
}

/* Danger */
.btn-danger {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn-danger:hover {
  background: var(--color-error-700);
  border-color: var(--color-error-700);
}

/* Sizes */
.btn-sm {
  height: 32px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  height: 48px;
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

/* Disabled */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: var(--border-thin);
  padding: var(--space-6);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  border-color: var(--border-color-strong);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.card-body {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin);
}

/* Card Variants */
.card-highlight {
  border-left: 4px solid var(--color-primary);
}

.card-success {
  border-left: 4px solid var(--color-success);
  background: var(--color-success-50);
}

.card-warning {
  border-left: 4px solid var(--color-warning);
  background: var(--color-warning-50);
}

.card-error {
  border-left: 4px solid var(--color-error);
  background: var(--color-error-50);
}

.card-info {
  border-left: 4px solid var(--color-info);
  background: var(--color-info-50);
}

[data-theme="dark"] .card-success { background: rgba(45, 198, 83, 0.08); }
[data-theme="dark"] .card-warning { background: rgba(255, 152, 0, 0.08); }
[data-theme="dark"] .card-error { background: rgba(230, 57, 70, 0.08); }
[data-theme="dark"] .card-info { background: rgba(33, 150, 243, 0.08); }

/* Stat Card */
.stat-card {
  padding: var(--space-5);
}

.stat-card-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.stat-card-value {
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
  color: var(--text-primary);
  line-height: var(--leading-none);
}

.stat-card-change {
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.stat-card-change.positive { color: var(--color-success); }
.stat-card-change.negative { color: var(--color-error); }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-100);
  color: var(--color-primary-800);
}

.badge-secondary {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge-accent {
  background: var(--color-accent-100);
  color: var(--color-accent-800);
}

.badge-success {
  background: var(--color-success-50);
  color: var(--color-success-700);
}

.badge-error {
  background: var(--color-error-50);
  color: var(--color-error-700);
}

.badge-warning {
  background: var(--color-warning-50);
  color: var(--color-warning-700);
}

.badge-neutral {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

[data-theme="dark"] .badge-primary { background: rgba(10, 36, 99, 0.3); color: var(--color-primary-200); }
[data-theme="dark"] .badge-secondary { background: rgba(27, 153, 139, 0.2); color: var(--color-secondary-200); }
[data-theme="dark"] .badge-success { background: rgba(45, 198, 83, 0.15); color: var(--color-success-500); }
[data-theme="dark"] .badge-error { background: rgba(230, 57, 70, 0.15); color: var(--color-error-500); }
[data-theme="dark"] .badge-neutral { background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); }

/* Badge with dot indicator */
.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
}

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  align-items: center;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-tertiary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.tab-content {
  display: none;
  padding: var(--space-6) 0;
  animation: fadeIn 0.25s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Accordion ---------- */
.accordion {
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion-item {
  border-bottom: var(--border-thin);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.accordion-trigger:hover {
  background: var(--bg-tertiary);
}

.accordion-trigger-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.accordion-item.open .accordion-trigger-icon {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease;
}

.accordion-item.open .accordion-body {
  max-height: 2000px;
}

.accordion-content {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* ---------- Modal ---------- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  animation: fadeIn 0.2s ease;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: var(--border-thin);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: modalSlideIn 0.3s var(--transition-spring);
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: var(--border-thin);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: var(--border-thin);
}

/* ---------- Toast / Notification ---------- */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  min-width: 320px;
  max-width: 420px;
  pointer-events: auto;
  animation: toastSlideIn 0.35s var(--transition-spring);
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

.toast.toast-exit {
  animation: toastSlideOut 0.25s ease forwards;
}

@keyframes toastSlideOut {
  to { opacity: 0; transform: translateX(100%); }
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast-success .toast-icon { color: var(--color-success); }
.toast-error .toast-icon { color: var(--color-error); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-info .toast-icon { color: var(--color-info); }

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: 2px;
}

.toast-close {
  width: 20px;
  height: 20px;
  color: var(--text-disabled);
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--text-primary);
}

/* ---------- Tooltip ---------- */
.tooltip {
  position: relative;
}

.tooltip-content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--color-neutral-800);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: var(--z-tooltip);
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-neutral-800);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
}

/* ---------- Progress Bar ---------- */
.progress {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-slow);
  min-width: 0;
}

.progress-bar.success {
  background: var(--color-success);
}

.progress-bar.warning {
  background: var(--color-warning);
}

.progress-sm { height: 4px; }
.progress-lg { height: 12px; }

/* Progress with label */
.progress-labeled {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.progress-labeled .progress {
  flex: 1;
}

.progress-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  min-width: 40px;
  text-align: right;
}

/* ---------- Progress Ring (Circle) ---------- */
.progress-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.progress-ring svg {
  transform: rotate(-90deg);
}

.progress-ring-track {
  fill: none;
  stroke: var(--bg-tertiary);
}

.progress-ring-fill {
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring-text {
  position: absolute;
  font-size: var(--text-xl);
  font-weight: var(--font-extrabold);
  color: var(--text-primary);
}

.progress-ring-text small {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-tertiary);
}

/* ---------- Forms ---------- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  height: 40px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  background: var(--background, var(--bg-secondary));
  border: 1px solid var(--input, var(--border-color));
  border-radius: var(--radius-md);
  color: var(--foreground, var(--text-primary));
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--ring, var(--border-focus));
  box-shadow: 0 0 0 2px var(--background, #fff), 0 0 0 4px var(--ring, var(--border-focus));
}

.form-input::placeholder {
  color: var(--text-disabled);
}

textarea.form-input {
  height: auto;
  min-height: 100px;
  padding: var(--space-3) var(--space-4);
  resize: vertical;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.form-error-msg {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

.form-input.error {
  border-color: var(--color-error);
}

/* ---------- Checkbox & Radio ---------- */
.checkbox-group,
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checkbox-label,
.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  padding: var(--space-2) 0;
}

.checkbox-label input,
.radio-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ---------- Alert Boxes ---------- */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.alert-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-info {
  background: var(--color-info-50);
  border-color: rgba(33, 150, 243, 0.2);
  color: var(--color-info-700);
}

.alert-success {
  background: var(--color-success-50);
  border-color: rgba(45, 198, 83, 0.2);
  color: var(--color-success-700);
}

.alert-warning {
  background: var(--color-warning-50);
  border-color: rgba(255, 152, 0, 0.2);
  color: var(--color-warning-700);
}

.alert-error {
  background: var(--color-error-50);
  border-color: rgba(230, 57, 70, 0.2);
  color: var(--color-error-700);
}

[data-theme="dark"] .alert-info { background: rgba(33, 150, 243, 0.08); color: #64B5F6; }
[data-theme="dark"] .alert-success { background: rgba(45, 198, 83, 0.08); color: #81C784; }
[data-theme="dark"] .alert-warning { background: rgba(255, 152, 0, 0.08); color: #FFB74D; }
[data-theme="dark"] .alert-error { background: rgba(230, 57, 70, 0.08); color: #EF9A9A; }

.alert-title {
  font-weight: var(--font-bold);
  margin-bottom: var(--space-1);
}

/* ---------- Tag ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  border: var(--border-thin);
}

/* ---------- Avatar ---------- */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  color: white;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary));
  flex-shrink: 0;
}

.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-lg { width: 56px; height: 56px; font-size: var(--text-lg); }
.avatar-xl { width: 80px; height: 80px; font-size: var(--text-2xl); }

/* ---------- Divider with Text ---------- */
.divider-text {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

.divider-text::before,
.divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

/* ---------- Skeleton Loading ---------- */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-tertiary) 25%,
    var(--bg-secondary) 37%,
    var(--bg-tertiary) 63%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

/* ---------- Chapter Card (Course page) ---------- */
.chapter-card {
  position: relative;
  padding: var(--space-6);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: var(--border-thin);
  transition: all var(--transition-base);
  overflow: hidden;
}

.chapter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.chapter-card:hover::before {
  opacity: 1;
}

.chapter-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.chapter-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-100);
  color: var(--color-primary-800);
  font-weight: var(--font-extrabold);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

[data-theme="dark"] .chapter-number {
  background: rgba(10, 36, 99, 0.3);
  color: var(--color-primary-200);
}

.chapter-card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
}

.chapter-card-desc {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.chapter-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.chapter-card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* ---------- Lesson Item (inside chapter) ---------- */
.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: var(--text-sm);
}

.lesson-item:hover {
  background: var(--bg-tertiary);
}

.lesson-item-status {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  border: 2px solid var(--border-color-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.lesson-item.completed .lesson-item-status {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.lesson-item.current .lesson-item-status {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 36, 99, 0.15);
}

.lesson-item-title {
  flex: 1;
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.lesson-item.completed .lesson-item-title {
  color: var(--text-tertiary);
}

.lesson-item-duration {
  font-size: var(--text-xs);
  color: var(--text-disabled);
}

/* ---------- Theme Toggle ---------- */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ---------- Search ---------- */
.search-wrapper {
  position: relative;
}

.search-input {
  width: 100%;
  height: 40px;
  padding: 0 var(--space-4) 0 var(--space-10);
  font-size: var(--text-sm);
  background: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  background: var(--bg-secondary);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-focus);
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-disabled);
  pointer-events: none;
}

.search-shortcut {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  padding: 2px 6px;
  background: var(--bg-secondary);
  border: var(--border-thin);
  border-radius: var(--radius-xs);
  font-size: var(--text-xs);
  color: var(--text-disabled);
  font-family: var(--font-mono);
}