/*
 * panel.css
 * ---------
 * Right-side large panel overlay for theme/code/settings.
 * 
 * Design Tokens from reflct.co DESIGN.md
 */

/* ================================================================
   Side Panel Overlay
   ================================================================ */

.side-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--side-panel-width);
  height: 100%;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border-default);
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
}

.side-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-8);
  border-bottom: 1px solid var(--color-border-default);
  flex-shrink: 0;
}

.side-panel-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.side-panel-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-8);
  height: var(--space-8);
  border: none;
  background: transparent;
  border-radius: var(--radius-xs);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.side-panel-close:hover {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.side-panel-close:active {
  transform: translateY(0);
}

.side-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6) var(--space-8);
}

.side-panel-body::-webkit-scrollbar { width: var(--space-1); }
.side-panel-body::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: var(--space-1); }

/* ================================================================
   Transition
   ================================================================ */

.side-panel-enter-active,
.side-panel-leave-active {
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.side-panel-enter-from,
.side-panel-leave-to {
  transform: translateX(100%);
  opacity: 0;
}

/* ================================================================
   Theme Grid
   ================================================================ */

.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-3);
}

.theme-category-label {
  grid-column: 1 / -1;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: var(--space-3);
  padding-bottom: var(--space-2);
}

.theme-category-label:first-child { padding-top: 0; }

.theme-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  padding-right: var(--space-6);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--motion-instant);
  position: relative;
  min-height: 56px;
}

.theme-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.theme-card:active {
  transform: translateY(0);
}

.theme-card.active {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-2);
}

.theme-card-name {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  text-align: center;
  line-height: 1.3;
  font-weight: 500;
  padding-right: var(--space-5);
}

.theme-card.active .theme-card-name {
  color: var(--color-accent);
}

.theme-card-star {
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-2xl);
  font-size: 14px;
  line-height: 1;
  transition: all var(--motion-instant);
}

.theme-card-star:hover {
  color: #f5a623;
  transform: scale(1.1);
}

.theme-card-star:active {
  transform: scale(0.95);
}

.theme-card-star.empty {
  color: var(--color-border-default);
}

.theme-card-star.empty:hover {
  color: #f5a623;
}

.theme-card-star.filled {
  color: #f5a623;
}

.theme-card-star:active {
  transform: translateY(0);
}

.theme-card-star.empty {
  color: var(--color-border-default);
}

.theme-card-star.empty:hover {
  color: #f5a623;
}

.theme-card-badge {
  position: absolute;
  top: var(--space-1);
  left: var(--space-1);
  font-size: 9px;
  padding: 1px 5px;
  background: var(--color-accent);
  color: white;
  border-radius: 3px;
  line-height: 1.3;
  font-weight: 500;
}

/* ================================================================
   Code Theme Grid
   ================================================================ */

.code-theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--space-3);
}

.code-panel-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.code-panel-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.code-panel-section + .code-panel-section {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-default);
}

.code-panel-section-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.code-theme-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.code-theme-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.code-theme-card:active {
  transform: translateY(0);
}

.code-theme-card.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-2);
}

.code-theme-name {
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  text-align: center;
  font-weight: 500;
}

.code-theme-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-align: center;
  line-height: 1.3;
}

.code-theme-card.active .code-theme-name {
  color: var(--color-accent);
}

/* ================================================================
   Settings
   ================================================================ */

.panel-settings-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.panel-settings-group.compact {
  gap: var(--space-2);
}

.panel-settings-group + .panel-settings-group {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-default);
}

.settings-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  font-weight: 500;
}

.settings-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: 1.5;
  padding-left: 2px;
}

.settings-shortcuts {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3) 0;
}

.settings-shortcuts div {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.settings-shortcuts kbd {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-sm);
  font-family: var(--font-mono);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* ── Toggle Switch ── */
.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
  background: var(--color-border-default);
  border-radius: var(--radius-2xl);
  cursor: pointer;
  transition: background var(--motion-instant);
  flex-shrink: 0;
}

.toggle-switch:hover {
  background: var(--color-border-strong);
}

.toggle-switch.active {
  background: var(--color-surface-strong);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: var(--radius-2xl);
  transition: transform var(--motion-instant);
  box-shadow: var(--shadow-1);
}

.toggle-switch.active::after {
  transform: translateX(16px);
}

/* ================================================================
   Responsive
   ================================================================ */

@media (max-width: 768px) {
  .side-panel { width: 100% !important; }
  .side-panel-body { padding: var(--space-6); }

  .theme-grid {
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
    gap: var(--space-2);
  }

  .theme-card {
    padding: var(--space-3) var(--space-2);
  }

  .code-theme-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-2);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .side-panel { --side-panel-width: 360px; }
}