/* ========================================
   Audio Spectrogram Generator - Styles
   ======================================== */

:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-tertiary: #242836;
    --bg-hover: #2d3247;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0b0;
    --text-muted: #6b7280;
    --accent: #4f8df9;
    --accent-hover: #3a7ae8;
    --accent-glow: rgba(79, 141, 249, 0.25);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.3);
    --success: #22c55e;
    --border: #2d3247;
    --border-light: #3a4060;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --transition: 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 1.5rem;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    color: var(--accent);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

#languageSelector {
    padding: 0.4rem 0.6rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition);
}

#languageSelector:focus {
    border-color: var(--accent);
}

/* Main */
.app-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Panels */
.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* Tabs */
.source-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition);
}

.tab-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Record */
.record-container {
    text-align: center;
}

.record-visualizer {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem;
    margin-bottom: 1rem;
    overflow: hidden;
}

.record-visualizer canvas {
    width: 100%;
    height: 80px;
    display: block;
}

.record-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.record-btn-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.record-btn-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.record-timer {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 1.2rem;
    color: var(--text-secondary);
    min-width: 60px;
}

.status-msg {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-height: 1.4em;
}

/* Upload */
.upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2.5rem 1.5rem;
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.upload-container:hover,
.upload-container.drag-over {
    border-color: var(--accent);
    background: rgba(79, 141, 249, 0.05);
}

.upload-container.drag-over {
    background: rgba(79, 141, 249, 0.1);
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.upload-formats {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.file-info {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.file-info .file-name {
    color: var(--text-primary);
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    gap: 0.4rem;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    padding: 0.6rem 1.4rem;
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn-record {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    padding: 0;
}

.btn-record:hover:not(:disabled) {
    box-shadow: 0 0 16px var(--danger-glow);
    transform: scale(1.05);
}

.btn-record.recording {
    animation: pulse-record 1.2s ease-in-out infinite;
}

@keyframes pulse-record {
    0%, 100% { box-shadow: 0 0 0 0 var(--danger-glow); }
    50% { box-shadow: 0 0 0 12px rgba(239, 68, 68, 0); }
}

.btn-stop {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    color: var(--text-primary);
    padding: 0;
}

.btn-stop:hover:not(:disabled) {
    background: var(--bg-hover);
}

.btn-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0;
}

.btn-icon:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.upload-btn {
    cursor: pointer;
}

/* Spectrogram */
.spectrogram-panel {
    padding-bottom: 1rem;
}

.spectrogram-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.spectrogram-header .panel-title {
    margin-bottom: 0;
}

.spectrogram-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.divider-v {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 0.3rem;
}

.spectrogram-wrapper {
    display: flex;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    overflow: hidden;
    position: relative;
}

.freq-axis {
    flex-shrink: 0;
    display: block;
    width: 60px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
}

.spectrogram-scroll {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
    cursor: crosshair;
}

.spectrogram-scroll::-webkit-scrollbar {
    height: 8px;
}

.spectrogram-scroll::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.spectrogram-scroll::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

#spectrogram-canvas {
    display: block;
    image-rendering: pixelated;
}

.spectrogram-overlay {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.spectrogram-time-axis-wrapper {
    display: flex;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    overflow: hidden;
}

.freq-axis-spacer {
    width: 60px;
    flex-shrink: 0;
    border-right: 1px solid var(--border);
}

.time-axis-scroll {
    flex: 1;
    overflow-x: hidden;
    overflow-y: hidden;
}

.time-axis {
    display: block;
}

.color-legend {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    justify-content: center;
}

.legend-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

#color-legend-canvas {
    border-radius: 3px;
    border: 1px solid var(--border);
}

.cursor-info {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--text-muted);
}

/* Player */
.player-panel {
    padding: 1rem 1.5rem;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-play {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    flex-shrink: 0;
    padding: 0;
}

.btn-play:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 0 12px var(--accent-glow);
}

.player-progress-wrapper {
    flex: 1;
}

.player-progress {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.player-progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    width: 0;
    transition: width 0.1s linear;
}

.player-time {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', monospace;
    margin-top: 0.3rem;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.volume-slider {
    width: 80px;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.setting-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.setting-group select,
.setting-group input[type="number"] {
    padding: 0.5rem 0.6rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
    transition: border-color var(--transition);
}

.setting-group select:focus,
.setting-group input[type="number"]:focus {
    border-color: var(--accent);
}

.setting-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    margin-top: 0.3rem;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

.range-value {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.setting-actions {
    display: flex;
    align-items: flex-end;
    grid-column: 1 / -1;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 1rem;
}

/* Loading */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 17, 23, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .app-main {
        padding: 1rem;
        gap: 1rem;
    }

    .panel {
        padding: 1rem;
    }

    .settings-grid {
        grid-template-columns: 1fr 1fr;
    }

    .player-controls {
        flex-wrap: wrap;
    }

    .volume-control {
        display: none;
    }

    .spectrogram-actions {
        flex-wrap: wrap;
    }

    .cursor-info {
        flex-direction: column;
        gap: 0.2rem;
        align-items: center;
    }

    .upload-container {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }

    .logo {
        font-size: 1.1rem;
    }
}
/* Species Analysis Link */
.species-link-container {
    text-align: center;
    margin-top: 0.75rem;
}

.species-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    transition: all var(--transition);
}

.species-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(79, 141, 249, 0.05);
}
/* Analyze Species Button */
.analyze-species-container {
    text-align: center;
    margin-top: 0.75rem;
}
.analyze-species-btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition);
}
.analyze-species-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(79, 141, 249, 0.05);
}