/* Light Theme CSS for Noise Reducer Tool */
:root {
    --noise-reducer-primary: #ec4899;
    --bg-secondary: var(--bg-secondary);
    --bg-tertiary: var(--bg-tertiary);
    --bg-accent: #3b82f6;
    --bg-success: #10b981;
    --bg-warning: #f59e0b;
    --bg-danger: #ef4444;
    --bg-dark: var(--text-primary);
    
    --noise-reducer-primary: #ec4899;
    --text-secondary: var(--text-secondary);
    --text-muted: var(--text-muted);
    --text-inverse: var(--bg-primary);
    
    --border-light: var(--border-color);
    --border-medium: #cbd5e1;
    --border-dark: #94a3b8;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --bg-warning: #0f172a;
    --bg-danger: #0f172a;
    --border-medium: #374151;
    --border-dark: #374151;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: calc(100vh - 120px);
}

/* Tool Header */
.tool-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.tool-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tool-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Upload Section */
.upload-section {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.upload-header h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
    font-weight: 600;
}

.upload-header p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.upload-area {
    border: 2px dashed var(--border-medium);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: var(--bg-accent);
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--bg-accent);
    background: rgba(59, 130, 246, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.7;
}

.upload-text {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.upload-text strong {
    color: var(--bg-accent);
}

.upload-formats {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

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

.file-input {
    display: none;
}

/* Noise Reduction Section */
.noise-section {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.noise-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.noise-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.audio-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-play, .btn-stop, .btn-preview, .btn-export {
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

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

.btn-play:hover {
    background: var(--success-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-stop:hover {
    background: var(--danger-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-preview {
    background: var(--bg-accent);
    color: var(--bg-primary);
}

.btn-preview:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-export {
    background: var(--bg-warning);
    color: var(--bg-primary);
}

.btn-export:hover {
    background: var(--warning-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Noise Controls */
.noise-controls {
    display: grid;
    gap: 25px;
}

.control-group {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 20px;
}

.control-title {
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.1rem;
    display: block;
}

.slider-container {
    margin-bottom: 20px;
}

.slider-container:last-child {
    margin-bottom: 0;
}

.slider-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.slider-container input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-medium);
    outline: none;
    margin-bottom: 8px;
    -webkit-appearance: none;
    appearance: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-accent);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--primary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.slider-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-accent);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.slider-container input[type="range"]::-moz-range-thumb:hover {
    background: var(--primary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.slider-value {
    display: inline-block;
    margin-left: 10px;
    font-weight: 600;
    color: var(--bg-accent);
    min-width: 60px;
}

.control-help {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 5px;
}

/* Select Dropdown */
.select-container {
    margin-bottom: 20px;
}

.select-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.select-container select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-medium);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.select-container select:focus {
    outline: none;
    border-color: var(--bg-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Checkbox Group */
.checkbox-group {
    display: grid;
    gap: 12px;
}

.checkbox-option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-option:hover {
    transform: translateX(4px);
}

.checkbox-option input[type="checkbox"] {
    margin-top: 2px;
    cursor: pointer;
}

.checkbox-label {
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
}

.checkbox-option small {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 2px;
}

/* Analysis Section */
.analysis-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 25px;
    margin-top: 30px;
}

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.analysis-header h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
}

.btn-process {
    background: var(--bg-accent);
    color: var(--bg-primary);
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-process:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-process:disabled {
    background: var(--border-medium);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.info-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.info-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

.info-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--bg-accent);
    margin-bottom: 5px;
}

/* Waveform Container */
.waveform-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 20px;
    margin-top: 25px;
    text-align: center;
}

.waveform-container canvas {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

.waveform-info {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Export Section */
.export-section {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.export-header h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.3rem;
    font-weight: 600;
}

.export-settings {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.setting-group {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 20px;
}

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.setting-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-medium);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.setting-group select:focus {
    outline: none;
    border-color: var(--bg-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.setting-help {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.export-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-download {
    background: var(--bg-success);
    color: var(--bg-primary);
    padding: 14px 28px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-download:hover {
    background: var(--success-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Processed Audio Player */
.processed-audio-player {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 25px;
    margin-top: 25px;
    text-align: center;
}

.processed-audio-player h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 600;
}

.processed-audio-player audio {
    width: 100%;
    max-width: 500px;
    margin-bottom: 20px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .tool-header {
        padding: 30px 15px;
        margin-bottom: 30px;
    }
    
    .tool-header h1 {
        font-size: 2rem;
    }
    
    .upload-section,
    .noise-section,
    .export-section {
        padding: 20px;
    }
    
    .noise-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .audio-controls {
        justify-content: center;
    }
    
    .analysis-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .info-cards {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .export-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .tool-header h1 {
        font-size: 1.8rem;
    }
    
    .audio-controls {
        flex-direction: column;
    }
    
    .btn-play,
    .btn-stop,
    .btn-preview,
    .btn-export {
        width: 100%;
        justify-content: center;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
}


/* 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);
}