/**
 * Tiered Annotation Styles
 *
 * Styles for the hierarchical multi-tier annotation interface.
 * Supports ELAN-style tiered annotation for audio/video content.
 */

/* Container */
.tiered-annotation-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 10px;
}

.tiered-annotation-container fieldset {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 15px;
}

.tiered-annotation-container legend {
    font-size: 14px;
    font-weight: 500;
    color: #333;
    padding: 0 8px;
}

/* Media Panel */
.tiered-media-panel {
    background: #1a1a1a;
    border-radius: 6px;
    padding: 10px;
    display: flex;
    justify-content: center;
}

.tiered-media-player {
    max-width: 100%;
    max-height: 300px;
}

.tiered-audio-player {
    width: 100%;
    height: 40px;
}

.tiered-video-player {
    max-height: 280px;
}

/* Tier Toolbar */
.tier-toolbar {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 12px;
    background: #f5f5f5;
    border-radius: 6px;
    flex-wrap: wrap;
}

.tier-toolbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 200px;
}

.tier-toolbar-center {
    flex: 1;
    min-width: 200px;
}

.tier-toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tier-select-label {
    font-size: 13px;
    font-weight: 500;
    color: #555;
    white-space: nowrap;
}

.tier-select {
    padding: 5px 10px;
    font-size: 13px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background: white;
    min-width: 120px;
}

.tier-select:focus {
    outline: none;
    border-color: #4ECDC4;
    box-shadow: 0 0 0 2px rgba(78, 205, 196, 0.2);
}

/* Label Buttons */
.label-buttons-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.label-button {
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    border: 2px solid;
    cursor: pointer;
    transition: all 0.15s ease;
}

.label-button:hover {
    filter: brightness(0.95);
    transform: translateY(-1px);
}

.label-button.active {
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}

/* Playback Controls */
.playback-rate-control {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
}

.playback-rate-control label {
    color: #666;
}

.playback-rate-select {
    padding: 3px 6px;
    font-size: 12px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

.zoom-control {
    display: flex;
    gap: 3px;
}

.zoom-control .btn {
    padding: 3px 8px;
    font-size: 11px;
}

.time-display {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: #333;
    background: white;
    padding: 4px 8px;
    border-radius: 3px;
    border: 1px solid #ddd;
}

.time-separator {
    color: #999;
    margin: 0 4px;
}

/* Timeline Container */
.tiered-timeline-container {
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    background: white;
}

/* Waveform Overview (full media at-a-glance) */
.waveform-overview-container {
    border-bottom: 1px solid #eee;
    background: #f9f9f9;
}

.waveform-overview {
    height: 40px;
    position: relative;
}

/* Fallback message when Peaks.js hasn't rendered overview yet */
.waveform-overview::before {
    content: 'Loading overview...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #888;
    font-size: 11px;
    font-style: italic;
}

/* Hide fallback when waveform content is present */
.waveform-overview:has(canvas)::before {
    display: none;
}

/* Zoomed Timeline View (for fine-grained editing) */
.zoomed-timeline-container {
    border-bottom: 1px solid #ddd;
    background: #fff;
    padding: 8px;
}

.zoomed-timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-size: 12px;
}

.zoomed-timeline-label {
    font-weight: 500;
    color: #666;
}

.zoomed-timeline-range {
    font-family: 'Courier New', monospace;
    color: #888;
    font-size: 11px;
}

/* Peaks.js zoomview waveform */
.zoomed-waveform {
    height: 60px;
    background: linear-gradient(to bottom, #f0f4f8 0%, #e8ecf0 100%);
    border: 1px solid #d0d4d8;
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    margin-bottom: 0;
    position: relative;
}

/* Fallback message when Peaks.js hasn't rendered yet */
.zoomed-waveform::before {
    content: 'Loading waveform...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #888;
    font-size: 11px;
    font-style: italic;
}

/* Hide fallback when waveform content is present (Peaks.js creates canvas elements) */
.zoomed-waveform:has(canvas)::before {
    display: none;
}

.zoomed-timeline-scroll {
    position: relative;
    height: 100px;
    background: #f8f9fa;
    border: 1px solid #d0d4d8;
    border-top: none;
    border-radius: 0 0 4px 4px;
    overflow: hidden;
}

.zoomed-timeline-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.zoomed-timeline-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
}

.zoomed-timeline-controls .btn {
    padding: 2px 8px;
    font-size: 12px;
}

.zoomed-timeline-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: #e0e0e0;
    border-radius: 3px;
    outline: none;
}

.zoomed-timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #4ECDC4;
    border-radius: 50%;
    cursor: pointer;
}

.zoomed-timeline-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #4ECDC4;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Tier Rows */
.tier-rows-container {
    display: flex;
    flex-direction: column;
}

.tier-row {
    display: flex;
    border-bottom: 1px solid #eee;
    transition: background-color 0.15s ease;
}

.tier-row:last-child {
    border-bottom: none;
}

.tier-row.active {
    background: #e8f5f4;
}

.tier-row.active .tier-label {
    background: #d4efed;
}

.tier-row.collapsed {
    height: 24px !important;
}

.tier-row.collapsed .tier-canvas-container {
    display: none;
}

/* Dependent tier styling */
.tier-row.tier-dependent {
    background: #fafafa;
}

.tier-row.tier-dependent .tier-label {
    padding-left: 20px;
}

.tier-row.tier-dependent .tier-label::before {
    content: '↳';
    position: absolute;
    left: 8px;
    color: #999;
    font-size: 11px;
}

/* Tier Label */
.tier-label {
    width: 120px;
    min-width: 120px;
    padding: 5px 10px;
    background: #f9f9f9;
    font-weight: 500;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-right: 1px solid #ddd;
    position: relative;
}

.tier-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.tier-collapse-btn {
    background: none;
    border: none;
    padding: 2px 4px;
    cursor: pointer;
    color: #888;
    font-size: 10px;
    opacity: 0.7;
    transition: opacity 0.15s;
}

.tier-collapse-btn:hover {
    opacity: 1;
}

/* Tier Canvas */
.tier-canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.tier-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.tier-row.active .tier-canvas {
    cursor: crosshair;
}

/* Time Axis */
.time-axis {
    height: 20px;
    background: #f5f5f5;
    border-top: 1px solid #ddd;
    padding-left: 120px;
    font-size: 10px;
    color: #666;
    display: flex;
    align-items: center;
}

/* Annotation List Panel */
.tiered-annotation-list-panel {
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
}

.annotation-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
}

.annotation-list-title {
    font-weight: 500;
    font-size: 13px;
    color: #333;
}

.annotation-list-toggle {
    padding: 2px 6px;
    font-size: 10px;
}

.annotation-list {
    max-height: 200px;
    overflow-y: auto;
}

.annotation-list.collapsed {
    display: none;
}

.annotation-list-tier-header {
    padding: 6px 12px;
    background: #f9f9f9;
    font-size: 11px;
    font-weight: 600;
    color: #666;
    border-bottom: 1px solid #eee;
}

.annotation-list-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    transition: background-color 0.1s;
}

.annotation-list-item:last-child {
    border-bottom: none;
}

.annotation-list-item:hover {
    background: #f8f8f8;
}

.annotation-list-item.selected {
    background: #e8f5f4;
}

.annotation-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

.annotation-label {
    font-size: 12px;
    font-weight: 500;
    color: #333;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.annotation-time {
    font-size: 11px;
    font-family: 'Courier New', monospace;
    color: #666;
    white-space: nowrap;
}

.annotation-delete-btn {
    background: none;
    border: none;
    color: #999;
    padding: 2px 4px;
    cursor: pointer;
    font-size: 10px;
    opacity: 0.6;
    transition: opacity 0.15s, color 0.15s;
}

.annotation-delete-btn:hover {
    opacity: 1;
    color: #e74c3c;
}

/* Empty state */
.annotation-list:empty::after {
    content: 'No annotations yet. Select a label and drag on the timeline to create annotations.';
    display: block;
    padding: 20px;
    text-align: center;
    color: #999;
    font-size: 12px;
    font-style: italic;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tier-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .tier-toolbar-left,
    .tier-toolbar-center,
    .tier-toolbar-right {
        width: 100%;
        justify-content: flex-start;
    }

    .tier-label {
        width: 80px;
        min-width: 80px;
        font-size: 11px;
    }

    .time-axis {
        padding-left: 80px;
    }
}

/* Focus states for accessibility */
.tier-select:focus,
.label-button:focus,
.playback-rate-select:focus,
.zoom-control .btn:focus {
    outline: 2px solid #4ECDC4;
    outline-offset: 2px;
}

/* Animation for new annotations */
@keyframes annotation-flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.annotation-list-item.new {
    animation: annotation-flash 0.3s ease-in-out 2;
}