/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f5f5;
}

/* Header Styles */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: #333;
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.username {
    color: #666;
    font-weight: 500;
}

/* Button Styles */
.logout-btn {
    padding: 8px 20px;
    background: #dc3545;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

.logout-btn:hover {
    background: #c82333;
}

.back-btn {
    padding: 8px 20px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
    transition: background 0.3s;
}

.back-btn:hover {
    background: #5568d3;
}

.view-btn {
    padding: 6px 15px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 13px;
    transition: background 0.3s;
    display: inline-block;
}

.view-btn:hover {
    background: #5568d3;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
    color: #666;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    color: #333;
    font-size: 32px;
    font-weight: 700;
}

.stat-card.purple {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-card.purple h3,
.stat-card.purple .stat-value {
    color: white;
}

/* Grade Badges */
.grade-badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: white;
}

.grade-badge.white {
    color: #333;
    border: 2px solid #ddd;
}

/* Form Elements */
select, input[type="text"], input[type="password"] {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

select:focus, input[type="text"]:focus, input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
}

/* Info Items */
.info-item {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.info-label {
    font-size: 12px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: 5px;
}

.info-value {
    font-size: 18px;
    color: #333;
    font-weight: 600;
}