/**
 * Audio Visualizer Suite - Main Styles
 * @package AudioVisualizerSuite
 * @version 2.0.0
 */

/* CSS Custom Properties */
:root {
    --avs-accent: #ff3b3b;
    --avs-contrast: #ffffff;
    --avs-background: #111111;
    --avs-wave-color: #3d3d3d;
    --avs-height: 48px;
    --avs-radius: 8px;
    --avs-transition: 0.2s ease;
}

/* Audio Sample List Container */
.avs-audio-sample-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.avs-sample-tracks {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Grid Layouts for Multi-Column Playlists */
.avs-sample-tracks.avs-grid-2,
.avs-sample-tracks.avs-grid-3,
.avs-sample-tracks.avs-grid-4 {
    display: grid;
    gap: 12px;
}

.avs-sample-tracks.avs-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.avs-sample-tracks.avs-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.avs-sample-tracks.avs-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Responsive grid fallbacks */
@media (max-width: 1024px) {
    .avs-sample-tracks.avs-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .avs-sample-tracks.avs-grid-3,
    .avs-sample-tracks.avs-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .avs-sample-tracks.avs-grid-2,
    .avs-sample-tracks.avs-grid-3,
    .avs-sample-tracks.avs-grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Category Tabs */
.avs-category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.avs-category-tab {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    border-radius: 20px;
    color: var(--avs-contrast);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--avs-transition);
    opacity: 0.7;
}

.avs-category-tab:hover {
    background: rgba(255, 255, 255, 0.15);
    opacity: 1;
}

.avs-category-tab.active {
    background: var(--avs-accent);
    color: #fff;
    opacity: 1;
}

/* Hidden tracks when filtering */
.avs-wavesurfer-track.avs-hidden {
    display: none;
}

/* WaveSurfer Track Styles */
.avs-wavesurfer-track {
    display: flex;
    flex-direction: column;
    background: var(--avs-background);
    border-radius: var(--avs-radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--avs-transition), box-shadow var(--avs-transition);
}

.avs-wavesurfer-track:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.avs-wavesurfer-track.avs-track-active {
    box-shadow: 0 0 0 2px var(--avs-accent), 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Track Header */
.avs-track-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
}

.avs-track-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--avs-contrast);
    opacity: 0.8;
    transition: opacity var(--avs-transition), color var(--avs-transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.avs-track-name.playing,
.avs-track-active .avs-track-name {
    color: var(--avs-accent);
    opacity: 1;
}

/* Waveform Container */
.avs-waveform-container {
    height: var(--avs-height);
    width: 100%;
    position: relative;
}

/* Placeholder for empty states */
.avs-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    background: rgba(0, 0, 0, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--avs-radius);
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    padding: 20px;
    text-align: center;
}

/* Spectral Visualizer Wrapper */
spectral-visualizer {
    display: block;
    width: 100%;
    border-radius: var(--avs-radius);
    overflow: hidden;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .avs-wavesurfer-track {
        --avs-height: 40px;
    }

    .avs-track-header {
        padding: 6px 10px;
    }

    .avs-track-name {
        font-size: 12px;
    }
}

/* Loading State */
.avs-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: var(--avs-contrast);
    opacity: 0.6;
}

.avs-loading::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: var(--avs-accent);
    border-radius: 50%;
    animation: avs-spin 0.8s linear infinite;
    margin-left: 8px;
}

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

/* Error State */
.avs-error {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: #ff4444;
    font-size: 14px;
    padding: 20px;
    text-align: center;
    background: rgba(255, 68, 68, 0.1);
    border-radius: var(--avs-radius);
}

/* WaveSurfer Overrides */
.avs-waveform-container wave {
    overflow: hidden !important;
}

.avs-waveform-container wave > wave {
    border-right: none !important;
}