/* BPM Detector Tool - Light Theme */
:root {
    /* Tool-specific colors */
    --bpm-detector-primary: #ec4899;
    --bpm-detector-primary-hover: #db2777;
    --bpm-detector-secondary: var(--primary-color);
    --bpm-detector-success: var(--success-color);
    --bpm-detector-warning: #f39c12;
    --bpm-detector-danger: #e74c3c;
    --bpm-detector-bg: var(--bg-primary);
    --bpm-detector-card-bg: var(--bg-secondary);
    --bpm-detector-border: #e9ecef;
    --bpm-detector-text: var(--text-primary);
    --bpm-detector-text-light: #6c757d;
    --bpm-detector-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --bpm-detector-hover: #f1f3f4;
    
    /* BPM-specific colors */
    --bpm-accent: #9b59b6;
    --beat-marker: #e74c3c;
    --waveform-bg: var(--bg-tertiary);
    --waveform-line: var(--primary-color);
    --playhead-color: #e74c3c;
}

[data-theme="dark"] {
    --bpm-detector-danger: #f87171;
    --bpm-detector-border: #374151;
    --bpm-accent: #60a5fa;
}

/* Tool Layout */
.tool-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Upload Section */
.upload-section {
    background: var(--bpm-detector-card-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--bpm-detector-shadow);
}

.upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bpm-detector-border);
}

.upload-header h3 {
    color: var(--bpm-detector-text);
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.file-info {
    background: var(--bpm-detector-primary);
    color: var(--bg-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.9rem;
}

.upload-area {
    border: 3px dashed var(--bpm-detector-border);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bpm-detector-bg);
}

.upload-area:hover {
    border-color: var(--bpm-detector-primary);
    background: var(--bpm-detector-hover);
}

.upload-area.dragover {
    border-color: var(--bpm-detector-success);
    background: rgba(46, 204, 113, 0.1);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.upload-text {
    margin: 0 0 0.5rem 0;
    color: var(--bpm-detector-text);
    font-size: 1.1rem;
}

.upload-formats {
    margin: 0;
    color: var(--bpm-detector-text-light);
    font-size: 0.9rem;
}

.upload-progress {
    margin-top: 1rem;
}

.progress-bar {
    height: 8px;
    background: var(--bpm-detector-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--bpm-detector-primary);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    color: var(--bpm-detector-text-light);
    font-size: 0.9rem;
}

/* Analysis Section */
.analysis-section {
    background: var(--bpm-detector-card-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--bpm-detector-shadow);
}

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bpm-detector-border);
}

.analysis-header h3 {
    color: var(--bpm-detector-text);
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.analysis-controls {
    display: flex;
    gap: 0.5rem;
}

.btn-analyze,
.btn-play,
.btn-stop {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.btn-analyze {
    background: var(--bpm-detector-primary);
    color: var(--bg-primary);
}

.btn-analyze:hover {
    background: var(--bpm-detector-primary-hover);
}

.btn-play {
    background: var(--bpm-detector-success);
    color: var(--bg-primary);
}

.btn-play:hover {
    background: #229954;
}

.btn-stop {
    background: var(--bpm-detector-danger);
    color: var(--bg-primary);
}

.btn-stop:hover {
    background: #c0392b;
}

.analysis-status {
    text-align: center;
    padding: 1rem;
    margin-bottom: 2rem;
    background: var(--bpm-detector-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 8px;
    font-weight: 500;
    color: var(--bpm-detector-text);
}

.analysis-status.analyzing {
    background: rgba(155, 89, 182, 0.1);
    border-color: var(--bpm-detector-primary);
    color: var(--bpm-detector-primary);
    animation: pulse 2s infinite;
}

.bpm-display {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--bpm-detector-primary), var(--bpm-detector-primary-hover));
    color: var(--bg-primary);
    border-radius: 12px;
    margin-bottom: 2rem;
}

.bpm-value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.bpm-number {
    font-size: 4rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

.bpm-unit {
    font-size: 1.5rem;
    font-weight: 600;
    opacity: 0.9;
}

.bpm-confidence {
    font-size: 1.1rem;
    opacity: 0.9;
}

.tempo-info {
    background: var(--bpm-detector-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 8px;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.tempo-classification,
.genre-suggestions {
    color: var(--bpm-detector-text);
}

.tempo-classification strong,
.genre-suggestions strong {
    color: var(--bpm-detector-primary);
}

/* Visualization Section */
.visualization-section {
    background: var(--bpm-detector-card-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--bpm-detector-shadow);
}

.visualization-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bpm-detector-border);
}

.visualization-header h3 {
    color: var(--bpm-detector-text);
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.viz-controls {
    display: flex;
    gap: 1rem;
}

.viz-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--bpm-detector-text);
    font-weight: 500;
    cursor: pointer;
}

.viz-controls input[type="checkbox"] {
    accent-color: var(--bpm-detector-primary);
}

.waveform-container {
    position: relative;
    margin: 2rem 0;
    border: 2px solid var(--bpm-detector-border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--waveform-bg);
}

#waveformCanvas {
    display: block;
    width: 100%;
    height: 200px;
}

.beat-markers {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.beat-marker {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--beat-marker);
    opacity: 0.7;
}

.playhead {
    position: absolute;
    top: 0;
    width: 3px;
    height: 100%;
    background: var(--playhead-color);
    pointer-events: none;
    display: none;
    z-index: 10;
}

.time-info {
    display: flex;
    justify-content: space-between;
    color: var(--bpm-detector-text-light);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Settings Section */
.settings-section {
    background: var(--bpm-detector-card-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--bpm-detector-shadow);
}

.settings-header h3 {
    color: var(--bpm-detector-text);
    margin: 0 0 2rem 0;
    font-size: 1.5rem;
    font-weight: 600;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bpm-detector-border);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-weight: 600;
    color: var(--bpm-detector-text);
    font-size: 0.95rem;
}

.setting-group select,
.setting-group input {
    padding: 0.75rem;
    border: 2px solid var(--bpm-detector-border);
    border-radius: 8px;
    background: var(--bpm-detector-bg);
    color: var(--bpm-detector-text);
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.setting-group select:focus,
.setting-group input:focus {
    outline: none;
    border-color: var(--bpm-detector-primary);
}

.time-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.time-inputs input {
    flex: 1;
}

.time-inputs span {
    color: var(--bpm-detector-text-light);
    font-weight: 500;
}

input[type="range"] {
    width: 100%;
    margin: 0.5rem 0;
}

.sensitivity-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--bpm-detector-text-light);
}

/* Results Section */
.results-section {
    background: var(--bpm-detector-card-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--bpm-detector-shadow);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bpm-detector-border);
}

.results-header h3 {
    color: var(--bpm-detector-text);
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-export {
    background: var(--bpm-detector-secondary);
    color: var(--bg-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-export:hover {
    background: var(--primary-hover);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-card {
    background: var(--bpm-detector-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.result-card:hover {
    transform: translateY(-2px);
}

.result-title {
    color: var(--bpm-detector-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.result-value {
    color: var(--bpm-detector-primary);
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

.detailed-analysis {
    background: var(--bpm-detector-bg);
    border: 1px solid var(--bpm-detector-border);
    border-radius: 8px;
    padding: 1.5rem;
}

.detailed-analysis h4 {
    color: var(--bpm-detector-text);
    margin: 0 0 1rem 0;
    font-size: 1.2rem;
}

.analysis-details {
    color: var(--bpm-detector-text-light);
    line-height: 1.6;
}

.hidden {
    display: none !important;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .tool-layout {
        gap: 1.5rem;
    }
    
    .upload-section,
    .analysis-section,
    .visualization-section,
    .settings-section,
    .results-section {
        padding: 1.5rem;
    }
    
    .analysis-header,
    .visualization-header,
    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .analysis-controls,
    .viz-controls {
        width: 100%;
        justify-content: center;
    }
    
    .bpm-number {
        font-size: 3rem;
    }
    
    .tempo-info {
        grid-template-columns: 1fr;
    }
    
    .settings-grid,
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    #waveformCanvas {
        height: 150px;
    }
}


/* Tool Hero Meta Pills */
.tool-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.meta-pill {
    background: rgba(236, 72, 153, 0.12);
    color: #831843;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    border: 1px solid rgba(236, 72, 153, 0.25);
}

/* Features Section */
.features-section {
    background: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 100%);
    padding: 4rem 0;
    margin: 3rem 0;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    background: var(--bg-primary);
    border: 1px solid #f9a8d4;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ec4899, #f472b6);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(236, 72, 153, 0.15);
    border-color: #ec4899;
}

.feature-item:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    filter: grayscale(0.3);
    transition: filter 0.3s ease;
}

.feature-item:hover .feature-icon {
    filter: grayscale(0);
}

.feature-item h4 {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.feature-item:hover h4 {
    color: #ec4899;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

/* Dark mode element overrides */
[data-theme="dark"] .tool-card {
    background: var(--bg-card, #1e293b);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] .tool-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: var(--input-bg, #1e293b);
    color: var(--text-primary, #f8fafc);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--text-muted, #64748b);
}

[data-theme="dark"] .tab-btn.active {
    color: white;
}

[data-theme="dark"] label {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6 {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] p {
    color: var(--text-secondary, #cbd5e1);
}