/* ===================================
   Responsive Breakpoints
   =================================== */

/* Tablet: Collapsed sidebar */
@media (max-width: 1024px) {
    .sidebar {
        width: var(--sidebar-w);
    }
    .sidebar.expanded {
        width: var(--sidebar-w-expanded);
    }
    .sidebar-label {
        opacity: 0;
    }
    .sidebar.expanded .sidebar-label {
        opacity: 1;
    }

    .main-content {
        left: var(--sidebar-w);
    }
    .sidebar.expanded ~ .main-content {
        left: var(--sidebar-w-expanded);
    }

    .panel-wide {
        grid-column: 1 / -1;
    }

    .identity-panel {
        flex-direction: column;
        text-align: center;
    }
    .identity-meta {
        justify-content: center;
    }

    .quick-actions {
        grid-template-columns: 1fr 1fr;
    }

    .timeline-labels {
        padding-left: 80px;
    }
    .timeline-row-label {
        width: 80px;
        font-size: 10px;
    }
    .timeline-bar {
        left: 80px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: var(--mobile-nav-h);
        background: var(--bg-secondary);
        border-top: 1px solid var(--border);
        z-index: 100;
        align-items: center;
        justify-content: space-around;
        padding: 0 4px;
    }

    .mobile-nav-link {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
        font-size: 10px;
        color: var(--text-muted);
        text-decoration: none;
        padding: 6px 8px;
        border-radius: 4px;
        transition: var(--t-fast);
    }
    .mobile-nav-link.active {
        color: var(--green);
    }
    .mobile-nav-link:hover {
        color: var(--text-primary);
    }

    .mobile-more-menu {
        position: fixed;
        bottom: var(--mobile-nav-h);
        right: 8px;
        background: var(--bg-panel);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 8px 0;
        z-index: 101;
        box-shadow: var(--shadow-modal);
    }
    .mobile-more-menu.visible {
        display: block;
    }

    .mobile-more-link {
        display: block;
        padding: 10px 20px;
        font-size: 13px;
        color: var(--text-secondary);
        text-decoration: none;
        transition: var(--t-fast);
    }
    .mobile-more-link:hover {
        background: var(--bg-panel-hover);
        color: var(--text-primary);
    }

    .main-content {
        left: 0;
        bottom: var(--mobile-nav-h);
        padding: 16px;
    }

    .topbar-time-range {
        display: none;
    }

    .topbar-logo {
        font-size: 12px;
    }

    .topbar-breadcrumb {
        display: none;
    }

    .panel-grid {
        grid-template-columns: 1fr;
    }

    .panel-wide,
    .panel-full,
    .panel-medium,
    .panel-small,
    .panel-tall,
    .panel-stat {
        grid-column: 1;
    }

    .stat-value {
        font-size: 28px;
    }

    .identity-panel {
        flex-direction: column;
        text-align: center;
    }
    .identity-meta {
        justify-content: center;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .squeue-header,
    .squeue-row {
        font-size: 11px;
    }
    .sq-time { width: 120px; }
    .sq-nodes { display: none; }
    .sq-partition { display: none; }

    .timeline-labels {
        padding-left: 60px;
        font-size: 10px;
    }
    .timeline-row-label {
        width: 60px;
        font-size: 9px;
    }
    .timeline-bar {
        left: 60px;
    }

    .nvidia-smi-output {
        font-size: 9px;
    }

    .network-interfaces {
        gap: 8px;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .artifact-card {
        flex-direction: column;
        text-align: center;
    }

    .syslog-entry {
        flex-wrap: wrap;
    }
    .syslog-time {
        width: 70px;
        font-size: 11px;
    }

    .terminal-modal {
        max-height: 90vh;
    }

    .boot-output {
        font-size: 11px;
    }
}

/* Very small */
@media (max-width: 400px) {
    .topbar {
        padding: 0 8px;
    }
    .main-content {
        padding: 12px;
    }
    .panel-body {
        padding: 12px;
    }
    .uptime-counter {
        gap: 12px;
    }
    .uptime-val {
        font-size: 22px;
    }
}