frontend/style.css

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.upload-section {
    padding: 40px;
    text-align: center;
}

.upload-area {
    border: 3px dashed #cbd5e1;
    border-radius: 12px;
    padding: 60px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.upload-area:hover {
    border-color: #4f46e5;
    background: #f1f5f9;
}

.upload-area.dragover {
    border-color: #4f46e5;
    background: #e0e7ff;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

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

.upload-hint {
    color: #64748b;
    font-size: 0.9rem;
}

.analyze-btn {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.analyze-btn:enabled:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(79, 70, 229, 0.4);
}

.analyze-btn:disabled {
    background: #94a3b8;
    cursor: not-allowed;
}

.preview-section {
    padding: 40px;
    text-align: center;
}

.preview-section img {
    max-width: 300px;
    max-height: 300px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.loading {
    padding: 60px;
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid #4f46e5;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.results-section {
    padding: 40px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.result-card {
    background: #f8fafc;
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid #4f46e5;
}

.result-card h3 {
    color: #1e293b;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.result-value {
    font-size: 1.3rem;
    font-weight: 600;
    color: #4f46e5;
    text-transform: capitalize;
}

.color-analysis, .confidence-scores {
    background: #f8fafc;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.color-palette {
    display: flex;
    gap: 15px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.color-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: white;
    border-radius: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.color-swatch {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    border: 2px solid #e2e8f0;
}

.confidence-bar {
    background: #e2e8f0;
    border-radius: 25px;
    height: 8px;
    margin-top: 5px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
    transition: width 0.3s ease;
}

@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 12px;
    }
    
    header {
        padding: 30px 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .upload-section, .results-section {
        padding: 30px 20px;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
}