:root {
    --bs-primary: #0d6efd;
    --bs-primary-rgb: 13, 110, 253;
    --bs-secondary: #6c757d;
    --bs-success: #198754;
    --bs-info: #0dcaf0;
    --bs-warning: #ffc107;
    --bs-danger: #dc3545;
    --bs-light: #f8f9fa;
    --bs-dark: #212529;
    --bs-font-sans-serif: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --bs-body-bg: #f0f2f5;
    --card-bg: #ffffff;
    --card-border-color: #e9ecef;
    --card-box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.04);
}

body {
    background-color: var(--bs-body-bg);
    font-family: var(--bs-font-sans-serif);
    color: #495057;
}

.navbar {
    background-color: var(--card-bg) !important;
    border-bottom: 1px solid var(--card-border-color);
    box-shadow: var(--card-box-shadow);
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.navbar .navbar-brand img {
    max-height: 40px;
}

.navbar-nav .nav-link {
    color: #343a40 !important;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--bs-primary) !important;
}

.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: var(--card-box-shadow);
    background-color: var(--card-bg);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--card-border-color);
    font-weight: 600;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.btn {
    border-radius: 0.5rem;
    font-weight: 600;
    padding: 0.6rem 1.2rem;
}

.table {
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--card-box-shadow);
}

.table thead th {
    background-color: #f8f9fa;
    border-bottom-width: 1px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.table tbody tr:last-child td,
.table tbody tr:last-child th {
    border-bottom: none;
}

.table tbody tr {
    transition: background-color 0.15s ease-in-out;
}

.table-hover > tbody > tr:hover {
    --bs-table-accent-bg: #f0f2f5;
}

.form-control, .form-select {
    border-radius: 0.5rem;
    background-color: #f8f9fa;
    border: 1px solid var(--card-border-color);
}

.form-control:focus, .form-select:focus {
    background-color: var(--card-bg);
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .card-body, .card-header {
        padding: 1rem;
    }

    .table-responsive {
        border: none;
    }
}