/* Audio Analyzer - Light Theme */

/* Upload Section */

/* Dark mode overrides */
[data-theme="dark"] {
    --tool-bg: #0f172a;
    --tool-border: #334155;
    --tool-border-hover: #475569;
    --tool-text: #f8fafc;
    --tool-text-secondary: #94a3b8;
    --tool-input-bg: #1e293b;
    --tool-input-border: #334155;
    --tool-button-bg: #1e293b;
    --tool-button-hover: #334155;
    --tool-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --tool-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --background-color: #0f172a;
    --text-color: #f8fafc;
    --status-info: rgba(96, 165, 250, 0.2);
    --status-success: rgba(34, 197, 94, 0.2);
    --status-error: rgba(248, 113, 113, 0.2);
    --bg-color: #0f172a;
}

/* 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);
}
.upload-section {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.upload-header {
    margin-bottom: 1.5rem;
}

.upload-header h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.file-info {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
}

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

.upload-area.dragover {
    border-color: var(--primary-hover);
    background: var(--bg-tertiary);
}

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

.upload-text {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

.upload-formats {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Analysis Section */
.analysis-section {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.analysis-header h3 {
    color: var(--text-primary);
    margin: 0;
}

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

.btn-play, .btn-stop, .btn-export, .btn-snapshot {
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    background: var(--bg-primary);
    color: var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.btn-play:hover, .btn-stop:hover, .btn-export:hover, .btn-snapshot:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
}

.btn-export {
    border-color: var(--success-color);
    color: var(--success-color);
}

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

/* Audio Properties */
.audio-properties {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.audio-properties h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.properties-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.property-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.property-label {
    color: var(--text-muted);
    font-weight: 500;
}

.property-value {
    color: var(--text-primary);
    font-weight: bold;
}

/* Level Analysis */
.level-analysis {
    margin-bottom: 2rem;
}

.level-analysis h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.level-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}

.level-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.level-value {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: bold;
    margin-bottom: 0.25rem;
}

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

/* Frequency Analysis */
.frequency-analysis {
    margin-bottom: 2rem;
}

.frequency-analysis h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.frequency-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.frequency-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

#spectrumCanvas {
    width: 100%;
    height: 300px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--text-primary);
}

/* Waveform Analysis */
.waveform-analysis {
    margin-bottom: 2rem;
}

.waveform-analysis h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

#waveformCanvas {
    width: 100%;
    height: 200px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--text-primary);
    margin-bottom: 1rem;
}

.waveform-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.stat-item span:first-child {
    color: var(--text-muted);
    font-weight: 500;
}

.stat-item span:last-child {
    color: var(--text-primary);
    font-weight: bold;
}

/* Spectral Analysis */
.spectral-analysis h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.spectral-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.spectral-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}

.spectral-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.spectral-value {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: bold;
    margin-bottom: 0.25rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .analysis-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .frequency-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .properties-grid {
        grid-template-columns: 1fr;
    }
    
    .level-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .spectral-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .analysis-section {
        padding: 1rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .level-grid {
        grid-template-columns: 1fr;
    }
    
    .spectral-grid {
        grid-template-columns: 1fr;
    }
}

/* Control Groups */
.control-group {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.control-group:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
}

.control-group h3 {
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-group h3::before {
    content: '';
    width: 4px;
    height: 16px;
    background: linear-gradient(135deg, #007acc, #0056b3);
    border-radius: 2px;
}

/* Option Groups */
.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1rem 0;
}

.option-group label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: block;
}

/* Setting Groups */
.setting-group {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin: 0.75rem 0;
    transition: background-color 0.3s ease;
}

.setting-group:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color, #bbdefb);
}

.setting-group label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    display: block;
}

/* Slider Containers */
.slider-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin: 0.5rem 0;
    position: relative;
    overflow: hidden;
}

.slider-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #007acc, #0056b3);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.slider-container:hover::before {
    opacity: 1;
}

.slider-container label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-container .slider-value {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    min-width: 60px;
    text-align: center;
}

/* Radio and Checkbox Options */
.radio-option, .checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.radio-option:hover, .checkbox-option:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 122, 204, 0.15);
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin: 0;
    cursor: pointer;
    accent-color: #007acc;
}

.radio-option label,
.checkbox-option label {
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    margin: 0;
    flex: 1;
}

.radio-option:has(input:checked),
.checkbox-option:has(input:checked) {
    background: var(--bg-tertiary);
    border-color: #1976d2;
}

.radio-option:has(input:checked) label,
.checkbox-option:has(input:checked) label {
    color: var(--primary-color);
    font-weight: 600;
}

/* Info Cards */
.info-card {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-surface, #f0f8ff) 100%);
    border: 1px solid var(--border-color, #bbdefb);
    border-radius: 8px;
    padding: 1.25rem;
    margin: 1rem 0;
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #007acc, #0056b3);
}

.info-card h4 {
    color: var(--primary-color);
    margin: 0 0 0.75rem 0;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-card p {
    color: var(--text-primary);
    margin: 0.5rem 0;
    line-height: 1.5;
    font-size: 0.9rem;
}

.info-card ul {
    color: var(--text-secondary, #455a64);
    margin: 0.75rem 0;
    padding-left: 1.25rem;
}

.info-card li {
    margin: 0.25rem 0;
    font-size: 0.85rem;
    line-height: 1.4;
}

/* Button Enhancements */
button {
    background: linear-gradient(135deg, #007acc 0%, #0056b3 100%);
    color: var(--bg-primary);
    border: none;
    border-radius: 6px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

button:hover {
    background: linear-gradient(135deg, #0056b3 0%, #004494 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 122, 204, 0.3);
}

button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 122, 204, 0.2);
}

button:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted, #90a4ae);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Select Enhancement */
select {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

select:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-tertiary);
}

select:focus {
    outline: none;
    border-color: #1976d2;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
    background-color: var(--bg-primary);
}

/* Input Enhancement */
input[type="file"] {
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

input[type="file"]:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-tertiary);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-track {
    background: linear-gradient(90deg, var(--border-color) 0%, var(--bg-tertiary, #f5f5f5) 100%);
    height: 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color, #d0d0d0);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #007acc, #0056b3);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 8px rgba(0, 122, 204, 0.3);
    transition: all 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 122, 204, 0.4);
}

input[type="range"]::-moz-range-track {
    background: linear-gradient(90deg, var(--border-color) 0%, var(--bg-tertiary, #f5f5f5) 100%);
    height: 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color, #d0d0d0);
}

input[type="range"]::-moz-range-thumb {
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #007acc, #0056b3);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 8px rgba(0, 122, 204, 0.3);
}

/* Progress Enhancement */
progress {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    overflow: hidden;
}

progress::-webkit-progress-bar {
    background: var(--bg-secondary);
    border-radius: 4px;
}

progress::-webkit-progress-value {
    background: linear-gradient(90deg, #007acc, #0056b3);
    border-radius: 4px;
    transition: width 0.3s ease;
}

progress::-moz-progress-bar {
    background: linear-gradient(90deg, #007acc, #0056b3);
    border-radius: 4px;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid #007acc;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
    z-index: 1000;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Success States */
.success {
    background: linear-gradient(135deg, #e8f5e8 0%, #f1f8e9 100%);
    border-color: #4caf50;
    color: var(--text-success);
}

.success button {
    background: linear-gradient(135deg, #4caf50 0%, #388e3c 100%);
}

.success button:hover {
    background: linear-gradient(135deg, #388e3c 0%, #2e7d32 100%);
}

/* Error States */
.error {
    background: linear-gradient(135deg, #ffebee 0%, #fce4ec 100%);
    border-color: #f44336;
    color: #c62828;
}

.error button {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
}

.error button:hover {
    background: linear-gradient(135deg, #d32f2f 0%, #c62828 100%);
}

/* Warning States */
.warning {
    background: linear-gradient(135deg, var(--bg-primary)8e1 0%, var(--bg-primary)de7 100%);
    border-color: #ff9800;
    color: #ef6c00;
}

.warning button {
    background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
}

.warning button:hover {
    background: linear-gradient(135deg, #f57c00 0%, #ef6c00 100%);
}

/* Focus States */
*:focus {
    outline: 2px solid #007acc;
    outline-offset: 2px;
}

*:focus-visible {
    outline: 2px solid #007acc;
    outline-offset: 2px;
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .container {
        border: 2px solid #000000;
    }
    
    .control-group {
        border: 2px solid #000000;
        background: var(--bg-primary);
    }
    
    button {
        border: 2px solid #000000;
        background: #000000;
        color: var(--bg-primary);
    }
    
    input[type="range"]::-webkit-slider-thumb {
        border: 2px solid #000000;
        background: #000000;
    }
}

/* Print Styles */
@media print {
    .container {
        box-shadow: none;
        border: 1px solid #000000;
    }
    
    button, input[type="file"] {
        display: none;
    }
    
    .control-group {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* Enhanced Mobile Responsiveness */
@media (max-width: 768px) {
    .control-group {
        padding: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .slider-container {
        padding: 0.75rem;
    }
    
    .radio-option, .checkbox-option {
        padding: 0.5rem;
    }
    
    .info-card {
        padding: 1rem;
    }
    
    button {
        padding: 0.625rem 1.25rem;
        font-size: 0.85rem;
    }
    
    select {
        padding: 0.625rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .control-group {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .control-group h3 {
        font-size: 1rem;
    }
    
    .slider-container {
        padding: 0.5rem;
    }
    
    .info-card {
        padding: 0.75rem;
    }
    
    .info-card h4 {
        font-size: 0.9rem;
    }
    
    button {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }


/* 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;
}