:root {
    --vns-navy: #071526;
    --vns-navy-2: #0d2238;
    --vns-blue: #1268d6;
    --vns-cyan: #20c7e8;
    --vns-bg: #f3f7fb;
    --vns-border: #dce6f1;
    --vns-muted: #64748b;
    --vns-shadow: 0 14px 40px rgba(15, 35, 63, .08);
}
body { background: var(--vns-bg); color: #122033; letter-spacing: 0; }
.app-shell { min-height: 100vh; display: flex; }
.app-sidebar { width: 280px; background: linear-gradient(180deg, var(--vns-navy), var(--vns-navy-2)); color: #fff; flex: 0 0 280px; }
.sidebar-brand { display: flex; align-items: center; gap: .8rem; padding: 1.2rem; border-bottom: 1px solid rgba(255,255,255,.12); }
.sidebar-brand img { width: 44px; height: 44px; object-fit: contain; background: #fff; border-radius: .5rem; padding: .25rem; }
.sidebar-brand span { display: block; color: rgba(255,255,255,.62); font-size: .8rem; }
.sidebar-nav { padding: .75rem; display: grid; gap: .15rem; }
.sidebar-nav a { color: rgba(255,255,255,.78); text-decoration: none; display: flex; align-items: center; gap: .75rem; padding: .7rem .8rem; border-radius: .5rem; }
.sidebar-nav a:hover, .sidebar-nav a.active { color: #fff; background: rgba(32,199,232,.16); }
.sidebar-nav i { width: 1.1rem; text-align: center; }
.app-main { flex: 1; min-width: 0; }
.vns-topbar { background: linear-gradient(90deg, var(--vns-navy), var(--vns-navy-2)); box-shadow: 0 8px 28px rgba(7,21,38,.18); min-height: 72px; }
.content-wrap { padding: 1.5rem; }
.vns-card { background: #fff; border: 1px solid var(--vns-border); border-radius: .5rem; box-shadow: var(--vns-shadow); }
.metric-card { padding: 1rem; min-height: 118px; }
.metric-card .icon { width: 42px; height: 42px; border-radius: .5rem; display: inline-flex; align-items: center; justify-content: center; background: #eaf6ff; color: var(--vns-blue); }
.metric-card .value { font-size: 1.85rem; font-weight: 800; }
.client-stats-value { font-size: 1.1rem !important; word-break: break-word; }
.btn-primary { background: var(--vns-blue); border-color: var(--vns-blue); }
.table > :not(caption) > * > * { vertical-align: middle; }
.modal-header { background: #f8fbff; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 1rem; background: #eef4f9; }
.login-shell { width: min(980px, 100%); background: #fff; border-radius: .75rem; overflow: hidden; box-shadow: var(--vns-shadow); }
.login-panel { background: linear-gradient(160deg, var(--vns-navy), var(--vns-navy-2)); color: #fff; }
.login-panel img { width: 70px; background: #fff; border-radius: .5rem; padding: .35rem; }
@media (max-width: 991.98px) {
    .app-shell { display: block; }
    .app-sidebar { width: 280px; }
    .content-wrap { padding: 1rem; }
}