* {
    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;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.form-container {
    background: white;
    max-width: 500px;
    margin: 50px auto;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #333;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: #5a67d8;
}

.dashboard {
    background: #f5f7fa;
    min-height: 100vh;
}

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

.nav-brand {
    font-size: 20px;
    font-weight: bold;
    color: #667eea;
}

.nav-links a {
    margin-left: 20px;
    text-decoration: none;
    color: #333;
    padding: 8px 15px;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-links a:hover {
    background: #667eea;
    color: white;
}

.dashboard-content {
    padding: 30px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #667eea;
    margin-top: 10px;
}

.data-table {
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.data-table th {
    background: #667eea;
    color: white;
    padding: 12px;
    text-align: left;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid #eee;
}

.data-table tr:hover {
    background: #f5f5f5;
}

.alert {
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
}

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

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

.attendance-card {
    background: white;
    max-width: 500px;
    margin: 50px auto;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
}

.wifi-status {
    margin: 20px 0;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
}

.status-badge {
    padding: 10px;
    border-radius: 5px;
    margin: 10px 0;
}

.status-badge.connected {
    background: #d4edda;
    color: #155724;
}

.status-badge.disconnected {
    background: #f8d7da;
    color: #721c24;
}

.status-badge.checking {
    background: #fff3cd;
    color: #856404;
}

.btn-checkin, .btn-checkout {
    padding: 15px 30px;
    font-size: 18px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
}

.btn-checkin {
    background: #28a745;
    color: white;
}

.btn-checkout {
    background: #dc3545;
    color: white;
}

.btn-checkin:disabled, .btn-checkout:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-small {
    padding: 5px 10px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 3px;
    font-size: 12px;
}

.search-box {
    margin-bottom: 20px;
}

.search-box input {
    padding: 10px;
    width: 300px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
    }
    
    .nav-links {
        margin-top: 10px;
    }
    
    .data-table {
        font-size: 12px;
        overflow-x: auto;
        display: block;
    }
}