:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --dark-bg: #1a1d20;
    --card-bg: #212529;
    --sidebar-bg: #111315;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #2d3238;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

.sidebar {
    height: 100vh;
    width: 250px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding-top: 20px;
    transition: all 0.3s;
    z-index: 1000;
}

.main-content {
    margin-left: 250px;
    padding: 20px;
    transition: all 0.3s;
}

.nav-link {
    color: var(--text-secondary);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: 0.3s;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.nav-link i {
    margin-right: 10px;
    width: 20px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 20px;
}

.card-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0;
}

.table {
    color: var(--text-primary);
}

.table thead th {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
}

.table td {
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.form-control, .form-select {
    background-color: #2b3035;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.form-control:focus {
    background-color: #2b3035;
    color: var(--text-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
}

.badge-pending { background-color: #ffc107; color: #000; }
.badge-approved { background-color: #198754; color: #fff; }
.badge-rejected { background-color: #dc3545; color: #fff; }

@media (max-width: 768px) {
    .sidebar {
        margin-left: -250px;
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar.active {
        margin-left: 0;
    }
}