/* Canvas container and preview-specific styles */

.preview-area {
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 16px;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 19px,
      rgba(0,0,0,0.02) 19px,
      rgba(0,0,0,0.02) 20px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 19px,
      rgba(0,0,0,0.02) 19px,
      rgba(0,0,0,0.02) 20px
    );
  background-size: 20px 20px;
  background-color: var(--paper-cool);
}

/* --- Tab bar --- */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
}

.tab-btn {
  padding: 8px 20px;
  border: none;
  background: none;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
  cursor: pointer;
  position: relative;
  transition: color 0.15s;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  transition: background 0.15s;
}

.tab-btn:hover {
  color: var(--ink-light);
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active::after {
  background: var(--accent);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Canvas views --- */
.canvas-view {
  display: none;
  flex: 1;
  min-height: 300px;
  position: relative;
}

.canvas-view.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 0;
  padding: 16px;
}

.canvas-wrapper canvas {
  max-width: 100%;
  max-height: 100%;
  box-shadow: var(--shadow-lg);
  border-radius: 2px;
}

/* --- Showcase (Render Example tab) --- */
.showcase-wrapper {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}

.showcase-wrapper canvas {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* --- Tile dimensions label --- */
.tile-info {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

/* --- Render Example tab --- */
.render-controls {
  width: 100%;
  max-width: 640px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.render-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
}

.render-card-header {
  margin-bottom: 16px;
}

.render-card-header .render-description {
  margin-top: 4px;
}

.render-description {
  font-size: 0.82rem;
  color: var(--ink-muted);
  line-height: 1.4;
}

/* --- Card state management --- */
.render-state {
  display: none;
}

.render-state.active {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* --- Form elements inside cards --- */
#renderUpload {
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--ink-light);
}

#renderPrompt {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--ink);
  background: var(--paper);
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
}

#renderPrompt:focus {
  border-color: var(--accent);
}

/* --- Preview image --- */
.render-preview-img {
  max-height: 200px;
  max-width: 100%;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  display: block;
  margin: 0 auto;
  object-fit: contain;
}

.render-preview-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  text-align: center;
  margin-top: 4px;
}

/* --- Side-by-side preview pair --- */
.render-preview-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* --- Prompt display in preview state --- */
.render-prompt-display {
  padding: 8px 12px;
  background: var(--paper);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--ink-light);
  line-height: 1.4;
  white-space: pre-wrap;
}

/* --- Button row --- */
.render-btn-row {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.btn-send {
  padding: 8px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-send:hover {
  background: var(--accent-hover);
}

.btn-cancel {
  padding: 8px 20px;
  background: none;
  color: var(--ink-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.btn-cancel:hover {
  color: var(--ink-light);
  border-color: var(--ink-muted);
}

/* --- Result image --- */
.render-result-img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* --- Success message --- */
.render-success-msg {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--success);
}

/* --- Loading / spinner --- */
.render-loading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--ink-muted);
  padding: 16px 0;
}

.render-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Error message --- */
.render-error {
  padding: 10px 14px;
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  line-height: 1.4;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .preview-area {
    padding: 16px;
    min-height: 350px;
  }

  .canvas-view {
    min-height: 250px;
  }
}