/**
 * Collapsible Component Styles
 */

.collapsible {
    margin: 1.5rem 0;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-primary, #ffffff);
    transition: all 0.2s ease;
}

.collapsible__header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    cursor: pointer;
    user-select: none;
    background: var(--bg-secondary, #f9fafb);
    transition: all 0.2s ease;
}

.collapsible__header:hover {
    background: var(--bg-hover, #f3f4f6);
}

.collapsible__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary, #6b7280);
    transition: transform 0.2s ease;
}

.collapsible__icon svg {
    width: 16px;
    height: 16px;
    transform: rotate(-90deg);
    transition: transform 0.2s ease;
}

.collapsible--open .collapsible__icon svg {
    transform: rotate(0deg);
}

.collapsible__title {
    flex: 1;
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary, #1f2937);
    outline: none;
    cursor: text;
}

.collapsible__title:empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted, #9ca3af);
    font-weight: 400;
}

.collapsible__title:focus {
    color: var(--accent-color, #3b82f6);
}

.collapsible__content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.collapsible--open .collapsible__content {
    max-height: 5000px; /* Large enough for most content */
}

.collapsible__content > div {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color, #e5e7eb);
}

.collapsible__content > div > *:first-child {
    margin-top: 0;
}

.collapsible__content > div > *:last-child {
    margin-bottom: 0;
}

/* Editor mode - always show content */
.ProseMirror .collapsible {
    border-left: 3px solid var(--text-muted, #9ca3af);
    transition: border-color 0.2s ease;
}

.ProseMirror .collapsible.collapsible--open {
    border-left-color: var(--accent-color, #3b82f6);
}

.ProseMirror .collapsible__content {
    max-height: none;
    overflow: visible;
    padding: 1.25rem;
    border-top: 1px solid var(--border-color, #e5e7eb);
    transition: opacity 0.2s ease;
}

.ProseMirror .collapsible__content > *:first-child {
    margin-top: 0;
}

.ProseMirror .collapsible__content > *:last-child {
    margin-bottom: 0;
}

.ProseMirror .collapsible:not(.collapsible--open) .collapsible__content {
    opacity: 0.5;
}

.ProseMirror .collapsible__header {
    cursor: pointer;
}

.ProseMirror .collapsible.collapsible--open .collapsible__header {
    background: var(--bg-hover, #f3f4f6);
}

/* Hover effect for icon in editor */
.ProseMirror .collapsible__icon:hover {
    color: var(--accent-color, #3b82f6);
}

/* Dark mode support */
[data-theme="dark"] .collapsible {
    border-color: #374151;
    background: #111827;
}

[data-theme="dark"] .collapsible__header {
    background: #1f2937;
}

[data-theme="dark"] .collapsible__header:hover,
[data-theme="dark"] .collapsible.collapsible--open .collapsible__header {
    background: #374151;
}

[data-theme="dark"] .collapsible__icon {
    color: #9ca3af;
}

[data-theme="dark"] .collapsible__title {
    color: #f9fafb;
}

[data-theme="dark"] .collapsible__title:empty::before {
    color: #6b7280;
}

[data-theme="dark"] .collapsible__content > div {
    border-color: #374151;
}

/* Dark mode editor overrides */
[data-theme="dark"] .ProseMirror .collapsible {
    border-left-color: #6b7280;
}

[data-theme="dark"] .ProseMirror .collapsible.collapsible--open {
    border-left-color: #60a5fa;
}

[data-theme="dark"] .ProseMirror .collapsible.collapsible--open .collapsible__header {
    background: #374151;
}

[data-theme="dark"] .ProseMirror .collapsible__content {
    border-top-color: #374151;
}

/* Responsive */
@media (max-width: 768px) {
    .collapsible__header {
        padding: 0.875rem 1rem;
    }
    
    .collapsible__title {
        font-size: 0.875rem;
    }
    
    .collapsible__content > div {
        padding: 1rem;
    }
}