:root {
    --primary-bg: #dcdee2;
    --secondary-color: #083c74;
    --body-bg: #f4f7f6;
    --text-color: #333333;
    --border-color: #cccccc;
    --hover-color: #062d57;
    --white: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
    --navbar-height: 80px;
    --sidebar-width: 250px;
}

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

body {
    font-family: "Poppins", sans-serif;
    background-color: var(--body-bg);
}

/* Navbar */
.navbar {
    height: var(--navbar-height);
    background-color: var(--white);
    box-shadow: 0 2px 10px var(--shadow);
    display: flex;
    align-items: center;
    padding: 0 50px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 32px;
    font-weight: 800;
    color: var(--secondary-color);
    letter-spacing: 2px;
    text-decoration: none;
}

/* Admin Layout (Tabs below Logo) */
.admin-header {
    background-color: var(--white);
    padding: 20px 50px 0;
    box-shadow: 0 2px 10px var(--shadow);
}

.admin-logo-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.admin-tabs {
    display: flex;
    gap: 30px;
    list-style: none;
}

.admin-tabs li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    padding: 15px 5px;
    display: block;
    position: relative;
    transition: color 0.3s ease;
}

.admin-tabs li a:hover,
.admin-tabs li a.active {
    color: var(--secondary-color);
}

.admin-tabs li a.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--secondary-color);
}

.heading {
    text-align: center;
    margin-bottom: 30px;
}

.heading h2 {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 28px;
}

/* Global Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 16px;
    font-family: "Poppins", sans-serif;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group input[type="submit"] {
    background-color: var(--secondary-color);
    color: var(--white);
    cursor: pointer;
    font-weight: 600;
    border: none;
    margin-top: 10px;
    transition:
        background-color 0.3s ease,
        transform 0.2s ease;
}

.form-group input[type="submit"]:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
}

.form-group input[type="submit"]:active {
    transform: translateY(0);
}

.form-group select {
    width: 100%;
    padding: 12px 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 16px;
    font-family: "Poppins", sans-serif;
    background-color: white;
}

/* Main Content */
.main-content {
    padding: 40px 50px;
    min-height: calc(100vh - 180px);
}

.page-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
}

.logout-btn {
    background-color: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 8px 15px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .admin-header {
        padding: 20px 20px 0;
    }
    .admin-tabs {
        overflow-x: auto;
        white-space: nowrap;
        gap: 20px;
    }
}

/* Global Utilities */
.btn-primary {
    display: inline-block;
    background-color: var(--secondary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--hover-color);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    margin-right: 5px;
    color: white;
    border: none;
    cursor: pointer;
}

.btn-edit {
    background-color: #f39c12;
}

.btn-delete {
    background-color: #e74c3c;
}

.btn-view {
    background-color: #3498db;
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    margin-right: 5px;
    color: white;
    border: none;
    cursor: pointer;
}

.btn-download {
    background-color: #2ecc71;
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    margin-right: 5px;
    color: white;
    border: none;
    cursor: pointer;
}

.error-text {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 5px;
    display: block;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
    border-radius: 5px;
}

/* Tables (Kept global as they are reused) */
.table-responsive {
    overflow-x: auto;
    margin-top: 20px;
}

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

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.data-table th {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
}

.data-table tr:hover {
    background-color: #f1f1f1;
}