:root {
    --sidebar-width: 260px;
    --soft-bg: #f5f7fb;
    --card-radius: 18px;
}
body {
    background: var(--soft-bg);
    font-family: Arial, Helvetica, sans-serif;
}
.auth-bg {
    background: linear-gradient(135deg, #eef4ff, #f9fbfd);
}
.app-card, .card {
    border-radius: var(--card-radius);
}
.app-shell {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: var(--sidebar-width);
    background: #0f172a;
    color: #fff;
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1040;
    transition: transform .25s ease;
}
.main-wrap {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
}
.sidebar-link {
    color: rgba(255,255,255,.8);
    border-radius: 12px;
    padding: .75rem 1rem;
}
.sidebar-link:hover,
.sidebar-link.active {
    color: #fff;
    background: rgba(255,255,255,.12);
}
.metric-card {
    border: 0;
    box-shadow: 0 8px 24px rgba(15,23,42,.06);
}
.table thead th {
    white-space: nowrap;
}
.badge-soft {
    background: #eef2ff;
    color: #4338ca;
}
.offline-indicator {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 1080;
    display: none;
}
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-wrap {
        margin-left: 0;
        width: 100%;
    }
}