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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 12px;
    padding: 40px;
    max-width: 600px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    text-align: center;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
    color: #333;
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 16px;
}

.section {
    margin-top: 20px;
}

input[type="file"] {
    display: block;
    margin: 20px auto;
    padding: 10px;
    border: 2px dashed #667eea;
    border-radius: 8px;
    width: 100%;
    cursor: pointer;
}

input[type="file"]:hover {
    border-color: #764ba2;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
    margin: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin: 10px;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
}

/* Loader animation */
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

.status-text {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin: 20px 0 10px 0;
}

.info-text {
    color: #666;
    font-size: 14px;
}

.success-icon {
    font-size: 64px;
    color: #4CAF50;
    margin: 20px 0;
}

.error-icon {
    font-size: 64px;
    color: #f44336;
    margin: 20px 0;
}