* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
}
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header h1 {
    font-size: 24px;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-links a {
    color: white;
    text-decoration: none;
    margin-right: 20px;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background 0.3s;
}
.nav-links a:hover {
    background: rgba(255,255,255,0.2);
}
.nav-links a.active {
    background: rgba(255,255,255,0.3);
    font-weight: bold;
}
.logout-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
}
.logout-btn:hover {
    background: rgba(255,255,255,0.3);
}
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}
.page-header h2 {
    color: #333;
}
.btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}
.btn:hover {
    transform: translateY(-2px);
}
.card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: bold;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}
.form-group textarea {
    min-height: 100px;
    resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}
.error {
    color: #e74c3c;
    font-size: 12px;
    margin-top: 5px;
}
.table-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
    font-size: 13px;
}
th {
    background: #f8f9fa;
    font-weight: bold;
    color: #333;
}
tr:hover {
    background: #f8f9fa;
}
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}
.pagination a {
    padding: 8px 12px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
}
.pagination a:hover {
    background: #667eea;
    color: white;
}
.pagination a.active {
    background: #667eea;
    color: white;
}
.back-link {
    display: inline-block;
    margin-top: 20px;
    color: #667eea;
    text-decoration: none;
}
.back-link:hover {
    text-decoration: underline;
}