/**
 * Audio Library CSS - Modern responsive interface
 * ESP32 OpenThread Audio Control
 */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    color: white;
    box-shadow: var(--shadow-lg);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header .subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Node Selector */
.node-selector {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.node-selector label {
    font-weight: 600;
    color: var(--text-primary);
}

.node-selector select {
    flex: 1;
    min-width: 200px;
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.node-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.volume-control input[type="range"] {
    width: 150px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

#volume-value {
    font-weight: 600;
    min-width: 50px;
    color: var(--primary-color);
}

.btn-stop {
    padding: 10px 20px;
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
    white-space: nowrap;
}

.btn-stop:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.btn-stop:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: scale(1);
    opacity: 0.5;
}

/* Search Section */
.search-section {
    margin-bottom: 30px;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.results-container {
    margin-top: 15px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    max-height: 600px;
    overflow-y: auto;
}

.results-container.hidden {
    display: none;
}

.results-header {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.no-results {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Section Styles */
section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
}

/* Collapsible Headers */
.collapsible-header {
    cursor: pointer;
    user-select: none;
    transition: opacity 0.3s;
}

.collapsible-header:hover {
    opacity: 0.8;
}

.toggle-icon {
    margin-left: auto;
    transition: transform 0.3s;
}

/* Instant Messages Grid */
.instant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    max-height: 600px;
    overflow-y: auto;
    padding: 10px;
}

/* Message Card - Simplified clickable design */
.message-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 20px;
    box-shadow: var(--shadow);
    transition: all 0.2s;
    cursor: pointer;
    user-select: none;
}

.message-card:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.message-card:active {
    transform: scale(0.98);
}

.instant-card {
    border-left: 4px solid var(--primary-color);
}

.message-description {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.6;
    font-weight: 500;
}

/* Categories Section */
.categories-section {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.category-section {
    margin-bottom: 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.category-header {
    padding: 15px 20px;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
}

.category-icon {
    font-size: 2rem;
    line-height: 1;
    min-width: 2rem;
    text-align: center;
}

.category-name {
    font-weight: 600;
    flex: 1;
    color: var(--text-primary);
}

.category-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.category-description {
    padding: 8px 20px 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    margin: 0;
}

.category-content {
    padding: 20px;
    max-height: 600px;
    overflow-y: auto;
    transition: max-height 0.5s ease-out, padding 0.3s;
}

.category-content.collapsed {
    max-height: 0;
    padding: 0 20px;
    overflow: hidden;
}

.messages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

/* Music Section */
.music-section {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.music-section.collapsed .section-content {
    display: none;
}

.albums-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.album-card {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
}

.album-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.album-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.album-name {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.album-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

/* Album Actions - Buttons for play album / show tracks */
.album-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.btn-play-album,
.btn-show-tracks {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
    width: 100%;
    text-align: center;
}

.btn-play-album {
    background: var(--primary-color);
    color: white;
}

.btn-play-album:hover {
    background: #1d4ed8;
    transform: scale(1.02);
}

.btn-show-tracks {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-show-tracks:hover {
    background: var(--border-color);
}

.btn-play-album:disabled,
.btn-show-tracks:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: scale(1);
}

/* Album Tracks - Expandable track list */
.album-tracks {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 2px solid var(--border-color);
    max-height: 400px;
    overflow-y: auto;
    transition: max-height 0.5s ease-out, padding 0.3s;
}

.album-tracks.collapsed {
    max-height: 0;
    padding: 0;
    border-top: none;
    overflow: hidden;
}

.tracks-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

/* Track Card - Individual tracks within album */
.track-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    transition: all 0.2s;
    cursor: pointer;
    user-select: none;
}

.track-card:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.track-card:active {
    transform: scale(0.98);
}

.track-card .message-description {
    font-size: 0.9rem;
}

/* Status Section */
.status-section {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.status-box {
    background: var(--card-bg);
    border: 2px solid var(--success-color);
    border-radius: 8px;
    padding: 15px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

.status-box.error {
    border-color: var(--error-color);
}

.status-box.hidden {
    display: none;
}

.status-icon {
    font-size: 1.5rem;
}

#status-text {
    flex: 1;
    font-weight: 500;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Footer */
footer {
    margin-top: 60px;
    padding: 30px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.stats span {
    font-size: 1rem;
    color: var(--text-secondary);
}

.stats strong {
    color: var(--primary-color);
}

.credits {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

/* Loading & Error States */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-style: italic;
}

.error {
    text-align: center;
    padding: 20px;
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
    border-radius: 6px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .instant-grid,
    .messages-grid {
        grid-template-columns: 1fr;
    }

    .albums-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .node-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .volume-control {
        width: 100%;
        justify-content: space-between;
    }

    .stats {
        flex-direction: column;
        gap: 10px;
    }

    .status-box {
        left: 20px;
        right: 20px;
        min-width: auto;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}