/* Card Chain Workspace - Story Arc Builder
 * =========================================
 * Interactive workspace for building card chains with drag-and-drop.
 */

.card-chain-workspace {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--color-gold); /* Gold for story building */
  border-radius: var(--radius-md);
  animation: slideIn 0.2s ease-out;
}

.card-chain-workspace.hidden {
  display: none !important;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header */
.card-chain-workspace__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-subtle);
}

.card-chain-workspace__icon {
  font-size: var(--font-size-lg);
}

.card-chain-workspace__title-input {
  flex: 1;
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gold);
  background: transparent;
  border: none;
  border-bottom: 1px dashed transparent;
  outline: none;
  padding: var(--spacing-xs) 0;
}

.card-chain-workspace__title-input:focus {
  border-bottom-color: var(--color-gold);
}

.card-chain-workspace__title-input::placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.card-chain-workspace__actions {
  display: flex;
  gap: var(--spacing-xs);
}

.card-chain-workspace__action {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--surface-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.card-chain-workspace__action:hover {
  background: var(--surface-tertiary);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.card-chain-workspace__action--primary {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--surface-primary);
  font-weight: 600;
}

.card-chain-workspace__action--primary:hover {
  background: var(--color-gold-dark, #d97706);
}

/* Canvas area */
.card-chain-workspace__canvas {
  position: relative;
  min-height: 120px;
  padding: var(--spacing-md);
  background: var(--surface-secondary);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.card-chain-workspace__canvas.drag-over {
  border-color: var(--color-gold);
  background: var(--overlay-gold-subtle, rgba(245, 158, 11, 0.05));
}

/* Nodes container */
.card-chain-workspace__nodes {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  min-height: 80px;
  position: relative;
  z-index: 1;
}

/* SVG edges layer */
.card-chain-workspace__edges {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.card-chain-workspace__edge {
  stroke: var(--text-muted);
  stroke-width: 2;
  fill: none;
  marker-end: url(#arrowhead);
}

.card-chain-workspace__edge--prerequisite {
  stroke: var(--text-muted);
}

.card-chain-workspace__edge--exclusive {
  stroke: var(--color-gold);
  stroke-dasharray: 5, 3;
}

.card-chain-workspace__edge--parallel {
  stroke: var(--color-accent-primary);
}

.card-chain-workspace__edge--optional {
  stroke: var(--text-muted);
  stroke-dasharray: 2, 2;
  opacity: 0.5;
}

/* Drop zone */
.card-chain-workspace__drop-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 100px;
  height: 80px;
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
  background: transparent;
  transition: all 0.15s ease;
}

.card-chain-workspace__drop-zone.drag-over {
  border-color: var(--color-gold);
  background: var(--overlay-gold-light, rgba(245, 158, 11, 0.1));
}

.card-chain-workspace__drop-text {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* Individual chain node (mini card) */
.chain-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 100px;
  max-width: 140px;
  padding: var(--spacing-sm);
  background: var(--surface-primary);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-sm);
  cursor: grab;
  transition: all 0.15s ease;
}

.chain-node:active {
  cursor: grabbing;
}

.chain-node:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--overlay-light-plus);
}

/* Node types */
.chain-node--entry {
  border-color: var(--color-accent-secondary);
}

.chain-node--entry::before {
  content: 'entry';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-accent-secondary);
  background: var(--surface-secondary);
  padding: 0 4px;
  border-radius: 2px;
}

.chain-node--branch {
  border-color: var(--color-gold);
}

.chain-node--branch::before {
  content: 'branch';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-gold);
  background: var(--surface-secondary);
  padding: 0 4px;
  border-radius: 2px;
}

.chain-node--merge {
  border-color: var(--color-accent-primary);
}

.chain-node--merge::before {
  content: 'merge';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-accent-primary);
  background: var(--surface-secondary);
  padding: 0 4px;
  border-radius: 2px;
}

.chain-node--exit {
  border-color: var(--color-accent-error);
}

.chain-node--exit::before {
  content: 'exit';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-accent-error);
  background: var(--surface-secondary);
  padding: 0 4px;
  border-radius: 2px;
}

/* Node status colors */
.chain-node--available {
  border-style: solid;
}

.chain-node--active {
  box-shadow: 0 0 0 2px var(--color-accent-secondary);
}

.chain-node--completed {
  opacity: 0.6;
}

.chain-node--pending {
  opacity: 0.5;
  border-style: dashed;
}

.chain-node--skipped {
  opacity: 0.3;
  text-decoration: line-through;
}

.chain-node__icon {
  font-size: var(--font-size-lg);
  text-align: center;
}

.chain-node__title {
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chain-node__type {
  font-size: 10px;
  text-align: center;
  color: var(--text-muted);
  text-transform: uppercase;
}

.chain-node__remove {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  background: var(--color-accent-error);
  border: none;
  border-radius: 50%;
  color: var(--color-text-primary);
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.chain-node:hover .chain-node__remove {
  opacity: 1;
}

.chain-node__remove:hover {
  background: var(--color-accent-error-dark, #dc2626);
}

/* Connection arrow between nodes */
.chain-connector {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: var(--font-size-lg);
}

.chain-connector--exclusive {
  color: var(--color-gold);
}

/* Footer */
.card-chain-workspace__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  border-top: 1px solid var(--border-subtle);
}

.card-chain-workspace__stats {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.card-chain-workspace__hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-style: italic;
}

/* Responsive */
@media (max-width: 600px) {
  .card-chain-workspace__header {
    flex-wrap: wrap;
  }

  .card-chain-workspace__title-input {
    width: 100%;
    order: -1;
    margin-bottom: var(--spacing-xs);
  }

  .card-chain-workspace__actions {
    width: 100%;
    justify-content: flex-end;
  }

  .card-chain-workspace__canvas {
    overflow-x: scroll;
  }

  .card-chain-workspace__footer {
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: center;
  }
}