/* Storyboard toolbar */
.storyboard-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 12px 24px; background: var(--bg-card); border-bottom: 1px solid var(--border-light); flex-shrink: 0; }
.storyboard-layout-toggle { display: flex; gap: 4px; }
.storyboard-layout-btn { padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: transparent; font-size: 12px; cursor: pointer; color: var(--text-secondary); transition: all var(--transition-fast); }
.storyboard-layout-btn.active { background: var(--primary); color: white; border-color: var(--primary); }
.storyboard-episode-info { font-size: 13px; color: var(--text-secondary); }

/* Storyboard grid */
.storyboard-grid { flex: 1; overflow-y: auto; padding: 20px 24px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; align-content: start; }
.storyboard-grid.layout-timeline { grid-template-columns: 1fr; }

/* Panel card */
.panel-card { background: var(--bg-card); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; border: 2px solid transparent; transition: all var(--transition-fast); }
.panel-card:hover { box-shadow: var(--shadow-md); }
.panel-card.active { border-color: var(--primary); }

.panel-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--bg-input); font-size: 12px; font-weight: 600; }
.panel-number { color: var(--primary); }
.panel-scene-ref { color: var(--text-secondary); font-weight: 400; }

.panel-image { height: 180px; background: #F0F2F5; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 8px; position: relative; }
.panel-image .placeholder-icon { font-size: 36px; opacity: .3; }
.panel-image .gen-img-btn { padding: 6px 14px; border: 1px dashed var(--primary); border-radius: var(--radius-md); background: var(--primary-light); color: var(--primary); font-size: 12px; cursor: pointer; }
.panel-image .gen-img-btn:hover { background: var(--primary); color: white; }

.panel-body { padding: 14px; }

.panel-desc { width: 100%; border: none; background: var(--bg-input); border-radius: var(--radius-sm); padding: 8px 10px; font-size: 13px; line-height: 1.6; resize: vertical; min-height: 48px; outline: none; color: var(--text-body); }
.panel-desc:focus { box-shadow: 0 0 0 2px rgba(22,93,255,.15); }

.panel-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.panel-meta-item { display: flex; align-items: center; gap: 4px; }
.panel-meta-item label { font-size: 11px; color: var(--text-secondary); white-space: nowrap; }
.panel-meta-item select { padding: 3px 6px; border: 1px solid var(--border); border-radius: var(--radius-xs); font-size: 11px; outline: none; background: var(--bg-card); }

.panel-characters { display: flex; gap: 4px; margin-top: 8px; flex-wrap: wrap; }
.panel-char-chip { display: flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: var(--radius-pill); background: var(--bg-input); font-size: 11px; }
.panel-char-avatar { width: 16px; height: 16px; border-radius: 50%; color: white; font-size: 8px; display: flex; align-items: center; justify-content: center; }

/* AI Image Prompt section */
.panel-prompt { margin-top: 10px; border-top: 1px solid var(--border-light); padding-top: 10px; }
.panel-prompt-toggle { font-size: 11px; color: var(--text-link); cursor: pointer; display: flex; align-items: center; gap: 4px; }
.panel-prompt-body { display: none; margin-top: 8px; }
.panel-prompt-body.show { display: block; }
.prompt-tab-bar { display: flex; gap: 4px; margin-bottom: 6px; }
.prompt-tab { padding: 2px 10px; border: 1px solid var(--border); border-radius: var(--radius-pill); font-size: 11px; cursor: pointer; background: transparent; color: var(--text-secondary); }
.prompt-tab.active { background: var(--primary); color: white; border-color: var(--primary); }
.prompt-text { font-size: 11px; color: var(--text-body); background: var(--bg-input); padding: 8px; border-radius: var(--radius-sm); line-height: 1.5; max-height: 80px; overflow-y: auto; }
.prompt-actions { display: flex; gap: 6px; margin-top: 6px; }
.prompt-copy-btn { font-size: 11px; padding: 3px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: transparent; cursor: pointer; color: var(--text-body); }
.prompt-copy-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Add panel button */
.add-panel-btn { grid-column: 1 / -1; padding: 20px; border: 2px dashed var(--border); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer; color: var(--text-secondary); font-size: 14px; transition: all var(--transition-fast); }
.add-panel-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Character costume view */
.costume-content { padding: 24px; overflow-y: auto; }
.costume-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.costume-card { background: var(--bg-card); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-sm); }
.costume-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.costume-card-header .avatar { width: 48px; height: 48px; font-size: 18px; }
.costume-card-header h4 { font-size: 15px; }
.costume-card-header .char-role { font-size: 12px; color: var(--text-secondary); }
.expression-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 12px 0; }
.expression-item { padding: 8px; border: 1px solid var(--border); border-radius: var(--radius-md); text-align: center; font-size: 12px; cursor: pointer; transition: all var(--transition-fast); }
.expression-item:hover { border-color: var(--primary); background: var(--primary-light); }
.expression-item.active { border-color: var(--primary); background: var(--primary-light); font-weight: 600; color: var(--primary); }