/* Modern rail surfaces for gallery/settings */

.rail-card {
  background: var(--pfse-surface-secondary);
  border: 1px solid var(--pfse-border-secondary);
  border-radius: var(--pfse-radius-md);
  padding: var(--pfse-spacing-3);
  display: flex;
  flex-direction: column;
  gap: var(--pfse-spacing-3);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.22);
}

.rail-card--stack {
  gap: var(--pfse-spacing-3);
}

.rail-header {
  display: flex;
  align-items: center;
  gap: var(--pfse-spacing-2);
  justify-content: space-between;
  flex-wrap: wrap;
}

.rail-title {
  font-weight: 700;
  letter-spacing: 0.4px;
}

.rail-meta {
  color: var(--pfse-text-muted);
  font-size: 12px;
}

.rail-actions {
  display: flex;
  align-items: center;
  gap: var(--pfse-spacing-2);
  flex-wrap: wrap;
}

.rail-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--pfse-spacing-1);
  padding: var(--pfse-spacing-1) var(--pfse-spacing-2);
  border-radius: var(--pfse-radius-md);
  border: 1px solid var(--pfse-border-secondary);
  background: var(--pfse-surface-primary);
  color: var(--pfse-text-high);
  transition:
    background var(--pfse-anim-micro) var(--pfse-ease-standard),
    border-color var(--pfse-anim-micro) var(--pfse-ease-standard),
    color var(--pfse-anim-micro) var(--pfse-ease-standard);
}

.rail-chip[aria-pressed="true"],
.rail-chip--accent {
  background: var(--pfse-accent-primary);
  border-color: var(--pfse-accent-primary);
  color: #081018;
}

.rail-chip input[type="checkbox"] {
  margin: 0;
}

.rail-chip:focus-visible,
  .rail-btn:focus-visible,
  .rail-list-item:focus-visible {
    outline: var(--pfse-focus-ring-width) solid var(--pfse-focus-ring-color);
    outline-offset: 2px;
}

.rail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pfse-spacing-1);
  padding: var(--pfse-spacing-1) var(--pfse-spacing-2);
  border-radius: var(--pfse-radius-sm);
  border: 1px solid var(--pfse-border-secondary);
  background: var(--pfse-surface-primary);
  color: var(--pfse-text-high);
  cursor: pointer;
  min-height: var(--pfse-control-height-sm);
}

.rail-btn--primary {
  background: var(--pfse-accent-primary);
  border-color: var(--pfse-accent-primary);
  color: #081018;
}

.rail-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.rail-list {
  display: flex;
  flex-direction: column;
  gap: var(--pfse-spacing-1);
  padding: var(--pfse-spacing-1) 0;
  max-height: 320px;
  overflow-y: auto;
}

.rail-list-item {
  display: flex;
  align-items: center;
  gap: var(--pfse-spacing-2);
  padding: var(--pfse-spacing-2) var(--pfse-spacing-3);
  border-radius: var(--pfse-radius-md);
  border: 1px solid var(--pfse-border-secondary);
  background: var(--pfse-surface-primary);
  color: var(--pfse-text-high);
  text-align: left;
}

.rail-item-name {
  font-weight: 600;
  flex: 1 1 auto;
  min-width: 0;
}

.rail-list-item[aria-selected="true"] {
  border-color: var(--pfse-accent-primary);
  box-shadow: 0 0 0 1px var(--pfse-accent-primary);
  background: color-mix(in srgb, var(--pfse-accent-primary) 16%, var(--pfse-surface-primary) 84%);
}

.rail-list-item .rail-pill {
  margin-left: auto;
  font-size: 12px;
  color: var(--pfse-text-muted);
}

.rail-section {
  border-top: 1px solid var(--pfse-border-secondary);
  padding-top: var(--pfse-spacing-2);
  display: flex;
  flex-direction: column;
  gap: var(--pfse-spacing-2);
}


/* Compact grid helper to prevent input overflow inside rail sections */
.rail-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--pfse-spacing-2);
  align-items: center;
}

.trace-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, var(--trace-col-width, 160px)));
  gap: var(--pfse-spacing-2);
  max-width: calc(2 * var(--trace-col-width, 160px) + var(--pfse-spacing-2));
  align-items: center;
}

.trace-color-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--pfse-spacing-3);
  justify-content: center;
}

.trace-color-card {
  width: 100%;
  max-width: 320px;
  min-width: 0;
}

.color-panel--compact {
  padding: var(--pfse-spacing-3);
  gap: var(--pfse-spacing-2);
}

.color-panel--compact .row { gap: var(--pfse-spacing-2); flex-wrap: wrap; }

.color-panel--compact .btn { padding: var(--pfse-spacing-1) var(--pfse-spacing-2); min-height: var(--pfse-control-height-sm); }

.color-panel--compact [data-testid="color-model-switch"] { gap: var(--pfse-spacing-2); }

.color-panel--compact [data-testid="color-hsl-controls"],
.color-panel--compact [data-testid="color-oklch-controls"] {
  gap: var(--pfse-spacing-1);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.color-panel--compact .caption.text-dim { white-space: nowrap; }

.color-panel--compact .color-controls label { min-width: 0; }

.rail-span-2 {
  grid-column: span 2;
}