body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Outfit', sans-serif;
    margin: 0;
    padding: 2rem;
    box-sizing: border-box;
    min-height: 100vh;
    background-image:
        radial-gradient(at 0% 0%, rgba(255, 0, 127, 0.04) 0px, transparent 40%),
        radial-gradient(at 100% 100%, rgba(0, 242, 254, 0.04) 0px, transparent 40%);
}

.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: var(--bg-color);
}
.auth-overlay[hidden] { display: none; }
.auth-card {
    display: grid;
    justify-items: center;
    gap: 1rem;
    width: min(100%, 26rem);
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--panel-bg);
    box-shadow: var(--card-glow);
    text-align: center;
}
.auth-card h2,
.auth-card p { margin: 0; }
.auth-card p { color: var(--text-muted); }

.header-identity {
    display: flex;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
}
.account-menu {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.35rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}
.account-menu #account-name::after { content: " ·"; }
.account-menu .time-btn { padding: 0; }

/* HEADER */
.header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: nowrap;
    gap: 1rem;
}

h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 0;
    background: linear-gradient(135deg, var(--cyan), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* DASHBOARD NAVIGATION */
.primary-nav {
    position: static;
    z-index: 20;
    display: flex;
    flex: 1 1 auto;
    min-width: 0;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.4rem;
    background: var(--nav-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav-tabs {
    display: flex;
    flex: 1 1 auto;
    gap: 0.35rem;
    overflow-x: auto;
}

.nav-tab {
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
    white-space: nowrap;
    padding: 0.75rem 1.15rem;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.nav-tab:hover { color: var(--text-color); border-color: var(--border-color); }
.nav-tab.active {
    color: var(--on-accent);
    background: linear-gradient(135deg, var(--cyan), var(--gradient-end));
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

.dashboard-views,
.dashboard-view {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.dashboard-view[hidden] { display: none; }
.dashboard-view.active { animation: view-enter 0.2s ease-out; }

@keyframes view-enter {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 720px) {
    body { padding: 1rem; }
    .dashboard-container { gap: 1rem; }
    .header { align-items: flex-start; flex-direction: column; }
    .primary-nav { align-items: stretch; width: 100%; }
    .nav-tabs { width: 100%; }
    .nav-tab { flex: 1 0 auto; padding: 0.65rem 0.85rem; }
    .telemetry-grid { grid-template-columns: minmax(0, 1fr); }
    .telemetry-chart-title { align-items: flex-start; flex-direction: column; gap: 0.35rem; }
    .topology-heading { flex-direction: column; align-items: flex-start; }
    .topology-heading-status { align-items: flex-start; }
    .topology-legend { justify-content: flex-start; }
    .topology-map { display: flex; flex-direction: column; gap: 0.75rem; }
    .topology-link { display: none; }
}

@media (min-width: 721px) and (max-width: 1120px) {
    .topology-map {
        grid-template-columns: minmax(190px, 1fr) 58px minmax(190px, 1fr) 58px minmax(190px, 1fr);
    }
    .topology-link-label { font-size: 0.55rem; padding-inline: 3px; }
}

@media (prefers-reduced-motion: reduce) {
    .topology-link.traffic .signal-track::after { animation: none !important; opacity: 0; }
}

/* Left menu appearances reuse the dashboard controls and color schemes. */
@media (min-width: 1201px) {
    :root[data-layout="left"] .dashboard-container {
        max-width: none;
        display: grid;
        grid-template-columns: 230px minmax(0, 1fr);
        align-items: start;
        column-gap: 1.5rem;
    }
    :root[data-layout="left"] .header {
        position: sticky;
        top: 2rem;
        min-height: calc(100vh - 4rem);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
    }
    :root[data-layout="left"] .header-identity { padding: 0.4rem; }
    :root[data-layout="left"] .header h1 { font-size: 1.5rem; }
    :root[data-layout="left"] .primary-nav {
        flex: 1 1 auto;
        align-items: stretch;
        padding: 0.55rem;
    }
    :root[data-layout="left"] .nav-tabs {
        flex-direction: column;
        flex: 0 1 auto;
        overflow-x: visible;
        overflow-y: auto;
    }
    :root[data-layout="left"] .nav-tab { width: 100%; text-align: start; }
    :root[data-layout="left"] .dashboard-views { min-width: 0; }
}