:root {
    --vns-blue: #08264a;
    --vns-blue-2: #0b376a;
    --vns-cyan: #12c7e8;
    --vns-soft: #eef8fb;
    --vns-border: #d9e7ef;
}

body {
    background: #f4f8fb;
    color: #102033;
}

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

.sidebar {
    width: 270px;
    background: linear-gradient(180deg, var(--vns-blue), #061b34);
    color: #fff;
    padding: 18px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: var(--vns-cyan);
    color: #05213d;
    font-weight: 800;
}

.brand span {
    display: block;
    color: #a9d9e8;
    font-size: 12px;
}

.sidebar .nav-link {
    color: #d9eef6;
    border-radius: 8px;
    padding: 11px 12px;
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 4px;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: rgba(18, 199, 232, .16);
    color: #fff;
}

.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    background: var(--vns-blue-2);
    color: #fff;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar h1 {
    font-size: 22px;
    line-height: 1.2;
    margin: 0;
    letter-spacing: 0;
}

.topbar small {
    color: #bfeaf4;
}

.content {
    padding: 24px;
    flex: 1;
}

.footer {
    border-top: 1px solid var(--vns-border);
    color: #5f7184;
    padding: 14px 24px;
    background: #fff;
}

.card-vns {
    border: 1px solid var(--vns-border);
    border-radius: 8px;
    box-shadow: 0 10px 26px rgba(8, 38, 74, .06);
}

.stat-card {
    border-left: 4px solid var(--vns-cyan);
}

.stat-card .value {
    font-size: 28px;
    font-weight: 800;
    color: var(--vns-blue);
}

.btn-cyan {
    background: var(--vns-cyan);
    border-color: var(--vns-cyan);
    color: #05213d;
    font-weight: 700;
}

.btn-cyan:hover {
    background: #0fb4d2;
    border-color: #0fb4d2;
    color: #05213d;
}

.role-pill {
    background: rgba(18, 199, 232, .18);
    color: #e9fbff;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
}

.table thead th {
    color: var(--vns-blue);
    white-space: nowrap;
}

.sortable {
    cursor: pointer;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at top left, #0e4f86, var(--vns-blue) 52%, #041525);
}

.login-card {
    width: min(430px, calc(100vw - 32px));
}

.callout {
    border: 1px solid var(--vns-border);
    border-left: 4px solid var(--vns-cyan);
    background: #fff;
    border-radius: 8px;
    padding: 12px 14px;
}

@media (max-width: 991px) {
    .sidebar {
        position: fixed;
        left: -290px;
        z-index: 1040;
        transition: left .2s ease;
    }

    .sidebar.open {
        left: 0;
    }

    .content {
        padding: 16px;
    }
}