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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 40px;
    font-size: 2.5em;
}

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

.upload-box {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 40px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-box:hover {
    border-color: #764ba2;
    background: #f8f9ff;
    transform: translateY(-5px);
}

.upload-label {
    cursor: pointer;
    display: block;
}

.upload-icon {
    font-size: 3em;
    margin-bottom: 10px;
}

.info-section {
    background: #f8f9ff;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.info-item {
    padding: 10px;
    color: #555;
    font-size: 0.95em;
}

.process-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 30px;
}

.process-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.process-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.canvas-container {
    text-align: center;
    margin-top: 30px;
}

#canvas {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.stats {
    margin-top: 30px;
    background: #f8f9ff;
    padding: 20px;
    border-radius: 10px;
}

.stats h3 {
    color: #667eea;
    margin-bottom: 15px;
}

#statsContent {
    color: #555;
}