* {
    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: 900px;
    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, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

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

.header p {
    opacity: 0.9;
}

.content {
    padding: 40px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #374151;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #3b82f6;
}

.btn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 14px 30px;
    font-size: 1.1rem;
    border-radius: 10px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

.question-card {
    background: #f9fafb;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 4px solid #3b82f6;
}

.question-number {
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
}

.question-text {
    color: #374151;
    margin-bottom: 15px;
}

.options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.option-btn {
    flex: 1;
    min-width: 100px;
    padding: 10px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.option-btn:hover {
    border-color: #3b82f6;
    background: #eff6ff;
}

.option-btn.selected {
    border-color: #10b981;
    background: #d1fae5;
    color: #065f46;
}

.score-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.score-item {
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    color: white;
    font-weight: 700;
}

.score-r { background: #f59e0b; }
.score-i { background: #6366f1; }
.score-a { background: #ec4899; }
.score-s { background: #10b981; }
.score-e { background: #f97316; }
.score-c { background: #8b5cf6; }

.table-container {
    overflow-x: auto;
}

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

table th, table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

table th {
    background: #f3f4f6;
    font-weight: 600;
    color: #374151;
}

.login-form {
    max-width: 400px;
    margin: 0 auto;
}

.nav-links {
    text-align: center;
    margin-top: 20px;
}

.nav-links a {
    color: #3b82f6;
    text-decoration: none;
    font-weight: 500;
}

.nav-links a:hover {
    text-decoration: underline;
}