/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    line-height: 1.6;
    color: #333;
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header and Navigation */
.navbar {
    background-color: #2c3e50;
    padding: 1rem 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu li a {
    color: #ecf0f1;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-menu li a:hover {
    background-color: #34495e;
}

.logout-link {
    margin-left: auto;
    background-color: #e74c3c;
}

.logout-link:hover {
    background-color: #c0392b;
}

/* Main Content Area */
.content {
    background-color: white;
    padding: 2rem;
    margin-top: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Login Page Styles */
.login-container {
    max-width: 400px;
    margin: 5% auto;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.login-form input {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.login-form button {
    width: 100%;
    padding: 0.8rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.login-form button:hover {
    background-color: #2980b9;
}

/* Table Styles */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.data-table th,
.data-table td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.data-table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

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

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    border-color: #3498db;
    outline: none;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

/* Alert Messages */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .logout-link {
        margin-left: 0;
    }
    
    .content {
        padding: 1rem;
        margin-top: 1rem;
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
}

/* Dashboard Cards */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}