:root {
    --dob-primary: #1f5a9d;
    --dob-secondary: #6c757d;
    --dob-success: #2f8b57;
    --dob-warning: #c48c21;
    --dob-danger: #b64747;
    --dob-bg: #f4f7fb;
    --dob-surface: #ffffff;
    --dob-border: #dbe4ef;
    --dob-shadow: 0 0.6rem 1.4rem rgba(15, 35, 65, 0.08);
}

body {
    background: linear-gradient(180deg, #f7f9fc 0%, var(--dob-bg) 100%);
    color: #1a2433;
}

.app-page {
    max-width: 1280px;
}

.page-title {
    font-weight: 700;
    letter-spacing: 0.01em;
}

.app-nav {
    background: linear-gradient(90deg, #1c3558 0%, #274e7a 100%);
    margin-bottom: 1rem;
}

.app-logo {
    height: 32px;
    width: auto;
}

.app-nav .nav-link {
    border-radius: 0.5rem;
    padding: 0.45rem 0.7rem;
    color: rgba(255, 255, 255, 0.9);
    transition: background-color 0.15s ease, color 0.15s ease;
}

.app-nav .nav-link:hover,
.app-nav .nav-link:focus {
    background-color: rgba(255, 255, 255, 0.14);
    color: #fff;
}

.app-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.25);
    color: #fff;
    font-weight: 600;
}

.card {
    border: 1px solid var(--dob-border);
    border-radius: 0.85rem;
    box-shadow: var(--dob-shadow);
    background-color: var(--dob-surface);
}

.card-header {
    border-bottom: 1px solid #edf2f8;
    background-color: transparent;
}

.collapse-indicator {
    transition: transform 0.2s ease-in-out;
}

a[data-bs-toggle="collapse"].collapsed .collapse-indicator {
    transform: rotate(-90deg);
}

.btn {
    border-radius: 0.55rem;
    font-weight: 600;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: #174878;
    border-color: #174878;
}

.btn-success {
    background-color: var(--dob-success);
    border-color: var(--dob-success);
}

.btn-warning {
    background-color: var(--dob-warning);
    border-color: var(--dob-warning);
    color: #fff;
}

.btn-danger {
    background-color: var(--dob-danger);
    border-color: var(--dob-danger);
}

.table {
    --bs-table-bg: transparent;
    --bs-table-border-color: #e8eef6;
}

.table thead th {
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-size: 0.78rem;
    color: #5b6f86;
}

.table td,
.table th {
    vertical-align: middle;
}

.table .btn {
    white-space: nowrap;
}

.badge {
    border-radius: 0.5rem;
    font-weight: 600;
}

.alert {
    border: 1px solid transparent;
    border-radius: 0.75rem;
}

.dashboard-tile {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.dashboard-tile:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.9rem 1.8rem rgba(0, 0, 0, 0.12) !important;
}

.dashboard-stat {
    font-size: clamp(1.5rem, 2vw, 2rem);
    font-weight: 700;
    line-height: 1;
}

.action-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.settings-grid .settings-card .card-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.settings-grid .settings-actions {
    display: grid;
    gap: 0.5rem;
    margin-top: auto;
}

.settings-grid .settings-card-major {
    min-height: 270px;
}

.settings-grid .settings-card-minor {
    min-height: 180px;
}

@media (max-width: 991.98px) {
    .app-nav .navbar-nav {
        margin-top: 0.75rem;
    }

    .app-nav .nav-link {
        padding: 0.55rem 0.7rem;
    }

    .settings-grid .settings-card-major,
    .settings-grid .settings-card-minor {
        min-height: 0;
    }
}