/**
 * Snapshot Bar CSS - Using Theme Variables
 * Tab unit + separate content panel
 */

/* ============================================
   Container - invisible wrapper
   ============================================ */
.snapshot-viewer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    box-shadow: none !important;
    pointer-events: none;
}

/* ============================================
   Tab Unit - invisible except for button and line
   ============================================ */
.snapshot-tab-unit {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    cursor: pointer;
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    box-shadow: none !important;
    pointer-events: auto;
}

/* The button part - positioned on left */
.snapshot-tab-unit .tab-button {
    position: absolute;
    bottom: 10px;
    left: 20px;
    background: var(--snapshot-tab-bg, var(--snapshot-bar-bg));
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--snapshot-bar-border);
    border-bottom: none;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--timeline-month-color);
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

/* The line part - full width at bottom */
.snapshot-tab-unit .tab-line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: var(--snapshot-tab-bg, var(--snapshot-bar-bg));
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border-top: 1px solid var(--snapshot-bar-border);
}

/* Hover state */
.snapshot-tab-unit:hover .tab-button,
.snapshot-tab-unit:hover .tab-line {
    background: var(--snapshot-tab-bg-hover, var(--snapshot-bar-bg-hover));
}

.snapshot-tab-unit:hover .tab-button {
    color: var(--text-primary);
}

/* Arrow */
.snapshot-tab-unit .toggle-arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

/* ============================================
   Content Panel - COMPLETELY HIDDEN when collapsed
   ============================================ */
.snapshot-content-panel {
    display: none !important;
    visibility: hidden !important;
}

/* ============================================
   Expanded State
   ============================================ */
.snapshot-viewer.expanded .snapshot-tab-unit {
    bottom: 90px;
}

.snapshot-viewer.expanded .snapshot-tab-unit .toggle-arrow {
    transform: rotate(180deg);
}

.snapshot-viewer.expanded .snapshot-content-panel {
    display: block !important;
    visibility: visible !important;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 90px;
    background: var(--snapshot-bar-bg);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border-top: 1px solid var(--snapshot-bar-border);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.2);
    pointer-events: auto;
}

.snapshot-content-panel .panel-inner {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 90px;
    padding: 0 16px;
    gap: 12px;
}

/* ============================================
   Content Elements
   ============================================ */

/* Take Snapshot Button - same visual size as thumbnails */
.snapshot-content-panel .take-snapshot-btn {
    min-width: 72px;
    width: 72px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--snapshot-btn-bg, var(--btn-primary-bg));
    border: 1px solid rgba(255, 255, 255, 0.15);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 
        0 4px 12px var(--accent-glow),
        var(--shadow-inset);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    position: relative;
}

.snapshot-content-panel .take-snapshot-btn:hover {
    transform: scale(1.05);
    box-shadow: 
        0 6px 20px var(--accent-glow),
        var(--shadow-inset);
}

.snapshot-content-panel .take-snapshot-btn:active {
    transform: scale(0.98);
}

.snapshot-content-panel .take-snapshot-btn .feedback {
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 12px;
    color: var(--color-success);
    animation: feedbackPop 0.3s ease;
}

@keyframes feedbackPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

/* Divider */
.snapshot-content-panel .snapshot-divider {
    width: 1px;
    height: 52px;
    background: var(--border-hover);
    margin: 0 8px;
}

/* Snapshots Container */
.snapshot-content-panel .snapshots-container {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 4px 0;
    scroll-behavior: smooth;
}

.snapshot-content-panel .snapshots-container::-webkit-scrollbar {
    height: 4px;
}

.snapshot-content-panel .snapshots-container::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

.snapshot-content-panel .snapshots-container::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--radius-sm);
}

/* Snapshot Thumbnail */
.snapshot-content-panel .snapshot-thumbnail {
    min-width: 60px;
    height: 52px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px;
    transition: all var(--transition-fast);
    position: relative;
}

.snapshot-content-panel .snapshot-thumbnail:hover {
    background: var(--accent-subtle);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.snapshot-content-panel .snapshot-thumbnail .snapshot-icon {
    font-size: 18px;
    line-height: 1;
}

.snapshot-content-panel .snapshot-thumbnail .snapshot-label {
    font-size: 9px;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.2;
    white-space: pre-line;
}

/* Delete button on thumbnail */
.snapshot-content-panel .snapshot-thumbnail .delete-snapshot {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    background: var(--color-danger);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    color: var(--text-on-accent);
    opacity: 0;
    transform: scale(0.8);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.snapshot-content-panel .snapshot-thumbnail:hover .delete-snapshot {
    opacity: 1;
    transform: scale(1);
}

.snapshot-content-panel .snapshot-thumbnail .delete-snapshot:hover {
    background: var(--color-danger-light);
    transform: scale(1.1);
}

/* Empty state */
.snapshot-content-panel .empty-state {
    color: var(--text-muted);
    font-size: 12px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.snapshot-content-panel .empty-state::before {
    content: '💡';
    font-size: 14px;
}

/* ============================================
   Mobile responsive
   ============================================ */
@media (max-width: 768px) {
    .snapshot-viewer.expanded .snapshot-tab-unit {
        bottom: 80px;
    }
    
    .snapshot-viewer.expanded .snapshot-content-panel {
        height: 80px;
    }
    
    .snapshot-content-panel .panel-inner {
        height: 80px;
    }
    
    .snapshot-content-panel .take-snapshot-btn {
        width: 52px;
        height: 44px;
        min-width: 52px;
        font-size: 18px;
    }
    
    .snapshot-content-panel .snapshot-thumbnail {
        min-width: 52px;
        height: 44px;
    }
    
    .snapshot-content-panel .snapshot-divider {
        height: 44px;
    }
}