* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 20px;
}

h1, h2, h3 {
    color: #333;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-danger {
    background: #ff6b6b;
    color: white;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

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

.question {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 15px;
}

.question-number {
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.options {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.option {
    flex: 1;
}

.option input[type="radio"] {
    margin-right: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

tr:hover {
    background: #f8f9fa;
}

.alert {
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.score-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.score-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
}

.score-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 5px;
}

.score-value {
    font-size: 28px;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.nav a {
    padding: 10px 20px;
    background: #f0f0f0;
    color: #333;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav a:hover,
.nav a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

@media (max-width: 600px) {
    .card {
        padding: 20px;
    }
    
    .options {
        flex-direction: column;
    }
}