* {
    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;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header h1 {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    font-size: 16px;
    opacity: 0.9;
}

.form-container {
    padding: 30px;
}

.form-section {
    margin-bottom: 40px;
}

.form-section h2 {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

.test-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.test-item {
    position: relative;
    cursor: pointer;
}

.test-item input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.test-item-content {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.test-item input[type="radio"]:checked + .test-item-content {
    border-color: #667eea;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.test-item-content h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 8px;
}

.test-item-content p {
    font-size: 14px;
    color: #666;
    margin-bottom: 12px;
}

.test-item-content .price {
    font-size: 24px;
    font-weight: 700;
    color: #667eea;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: #333;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.order-summary {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 20px;
    border-radius: 12px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
    color: #666;
}

.summary-row.total {
    margin-bottom: 0;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    font-size: 18px;
    font-weight: 700;
}

.summary-row span:first-child {
    color: #333;
}

.summary-row span:last-child {
    color: #667eea;
    font-weight: 600;
}

.summary-row.total span:last-child {
    color: #667eea;
    font-size: 28px;
}

.submit-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.submit-btn:active {
    transform: translateY(0);
}

.tip {
    text-align: center;
    font-size: 12px;
    color: #999;
    margin-top: 15px;
}

@media (max-width: 768px) {
    .container {
        border-radius: 0;
    }

    .header {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 24px;
    }

    .form-container {
        padding: 20px;
    }

    .test-items {
        grid-template-columns: 1fr;
    }

    .test-item-content .price {
        font-size: 20px;
    }
}

.loading {
    display: none;
    text-align: center;
    padding: 40px;
}

.loading.show {
    display: block;
}

.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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