* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.login-box h1 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

.login-box h2 {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 1.2em;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

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

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

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

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

/* Navbar */
.navbar {
    background: #2c3e50;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.navbar-brand h2 {
    font-size: 1.5em;
}

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

.user-name {
    font-weight: 600;
    font-size: 1.1em;
}

.user-role {
    color: #95a5a6;
    font-size: 0.9em;
}

.btn-logout {
    background: #e74c3c;
    color: white;
    padding: 8px 16px;
    border-radius: 5px;
    text-decoration: none;
    transition: background 0.3s;
}

.btn-logout:hover {
    background: #c0392b;
}

/* Container */
.container {
    display: flex;
    min-height: calc(100vh - 70px);
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: white;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #ecf0f1;
}

.sidebar ul {
    list-style: none;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    display: block;
    padding: 12px 15px;
    color: #555;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.sidebar ul li a:hover {
    background: #ecf0f1;
    color: #2c3e50;
}

.sidebar ul li a.active {
    background: #667eea;
    color: white;
}

.sidebar ul li a.disabled {
    color: #bdc3c7;
    cursor: not-allowed;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-x: auto;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.page-header p {
    color: #7f8c8d;
}

/* Table */
.table-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: #2c3e50;
    color: white;
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.data-table tbody tr {
    border-bottom: 1px solid #ecf0f1;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.data-table td {
    padding: 12px 15px;
    color: #555;
}