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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --accent-color: #3498db;
    --background-color: #ecf0f1;
    --text-color: #2c3e50;
    --border-color: #bdc3c7;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --hover-shadow: rgba(0, 0, 0, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 20px;
}

.language-selector {
    position: absolute;
    top: 0;
    right: 0;
}

#languageSelect {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#languageSelect:hover {
    border-color: var(--accent-color);
}

.upload-area {
    background-color: white;
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 40px;
}

.upload-area:hover {
    border-color: var(--accent-color);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.upload-area.dragover {
    border-color: var(--secondary-color);
    background-color: #ffeaa7;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.upload-text {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.upload-subtext {
    color: #7f8c8d;
}

.preview-section {
    background-color: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 16px var(--shadow-color);
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

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

.preview-box h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.media-container {
    position: relative;
    background-color: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.media-container img,
.media-container video,
.media-container canvas {
    width: 100%;
    height: auto;
    display: block;
}

.processing-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

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

.style-selector {
    margin-bottom: 30px;
}

.style-selector h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.style-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.style-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.style-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.style-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.controls {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.slider-group {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 16px;
}

.slider-group label {
    font-weight: 500;
    white-space: nowrap;
}

#intensitySlider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background-color: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

#intensitySlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--accent-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

#intensitySlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 8px var(--hover-shadow);
}

#intensityValue {
    font-weight: 500;
    min-width: 40px;
}

.download-btn,
.reset-btn {
    padding: 12px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.download-btn {
    background-color: var(--secondary-color);
    color: white;
}

.download-btn:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.reset-btn {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.reset-btn:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    font-size: 14px;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .preview-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .style-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .slider-group {
        width: 100%;
    }
    
    .download-btn,
    .reset-btn {
        width: 100%;
    }
}