:root {
    --primary-bg: #f4f7f9;
    --sidebar-color: #98b9ab;
    --accent-color: #2d5c49;
    --text-dark: #333;
    --white: #ffffff;
}

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

body {
    background-color: var(--primary-bg);
    color: var(--text-dark);
}

.container {
    display: flex;
    min-height: 100vh;
}

/* ===== FIXED SIDEBAR ===== */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-color);
    color: var(--white);
    padding: 20px;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: -1; /* sidebar behind navbar */
}

.sidebar h2 {
    margin-top: 100px;
    margin-bottom: 30px;
    text-align: center;
    color: var(--accent-color);
}

.sidebar ul {
    list-style: none;
}

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    color: #000000;
    text-decoration: none;
    font-size: 1.1rem;
    display: block;
    padding: 10px;
    transition: 0.3s;
    text-shadow: #98b9ab;
}

.sidebar ul li a:hover {
    background: #34495e;
    color: var(--white);
    border-radius: 5px;
}

.logout {
    margin-top: 50px;
    color: #e74c3c !important;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 40px;
    padding-top: 140px; /* 100px for navbar + 40px default padding */
}

header {
    margin-bottom: 30px;
}

header h1 {
    margin-top: 0;
}

.card {
    background: var(--white);
    padding: 25px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.card h3 {
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary-bg);
    padding-bottom: 10px;
}

.admin-form .form-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.admin-form input, .admin-form select {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.table-wrapper {
    overflow-x: auto;
}

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

th, td {
    text-align: left;
    padding: 15px;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #f8f9fa;
    color: #000000;
}

.status.active {
    background: #d4edda;
    color: #155724;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.btn-sm {
    padding: 5px 10px;
    background: #eee;
    border: 1px solid #ddd;
    border-radius: 3px;
    cursor: pointer;
}