:root {
    --blue: #1769d1;
    --teal: #0f9f9a;
    --green: #69b37b;
    --ink: #172033;
    --muted: #657083;
    --bg: #f5f8fb;
    --line: #dfeaf3;
    --panel: #ffffff;
    --dark: #101827;
}

* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(circle at 20% 0%, #e9fbf8 0, rgba(233,251,248,0) 28%), var(--bg); color: var(--ink); font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 250px; padding: 18px 14px; border-right: 1px solid rgba(255,255,255,.08); background: linear-gradient(180deg, #111c2e, #123047 58%, #123c3a); position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand strong { color: #fff; letter-spacing: .02em; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 8px; color: #fff; font-weight: 800; background: linear-gradient(135deg, var(--blue), var(--teal)); box-shadow: 0 10px 24px rgba(18, 166, 160, .28); }
.brand small { display: block; color: #a9bacd; line-height: 1.1; }
.sidebar .nav { margin-top: 26px; gap: 4px; }
.sidebar .nav-link { color: #c9d6e5; border-radius: 8px; padding: 9px 11px; font-size: 14px; }
.sidebar .nav-link.active, .sidebar .nav-link:hover { background: rgba(255,255,255,.12); color: #fff; }
.content { flex: 1; min-width: 0; padding: 26px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.topbar h1 { margin: 0; font-size: 24px; }
.topbar p { margin: 4px 0 0; color: var(--muted); }
.admin-chip { background: #fff; border: 1px solid #dbe7f2; border-radius: 999px; padding: 8px 14px; }
.metric, .panel, .toolbar-card { background: rgba(255,255,255,.94); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 10px 25px rgba(23, 32, 51, .045); }
.metric { min-height: 92px; padding: 14px; display: flex; flex-direction: column; justify-content: space-between; }
.metric span { color: var(--muted); font-size: 13px; }
.metric strong { font-size: 22px; word-break: break-word; }
.panel { padding: 20px; }
.toolbar-card { padding: 14px; }
.panel h2 { font-size: 18px; margin-bottom: 16px; }
.compact-panel h2, .tech-panel h2 { font-size: 17px; margin-bottom: 8px; }
.narrow { max-width: 760px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.btn-primary { background: var(--blue); border-color: var(--blue); }
.qr-box { background: #f8fbfd; border: 1px solid #dce8f2; border-radius: 8px; padding: 16px; overflow: auto; }
.qr-box pre { margin: 0; white-space: pre-wrap; word-break: break-all; font-size: 12px; }
.qr-img { width: min(320px, 100%); height: auto; border: 1px solid #dce8f2; border-radius: 8px; padding: 12px; background: #fff; }
.qr-timer { display: inline-flex; gap: 6px; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px; color: #415067; background: #f8fbfd; font-size: 13px; }
.status-pill { display: inline-flex; align-items: center; justify-content: center; min-width: 112px; border-radius: 999px; padding: 7px 12px; font-size: 13px; font-weight: 700; margin-bottom: 12px; }
.status-pill.ok { background: #e7f8ed; color: #167341; border: 1px solid #bde9cb; }
.status-pill.down { background: #fff1f0; color: #b42318; border: 1px solid #ffd1cc; }
.device-meta { color: var(--muted); font-size: 13px; }
.device-identity { display: grid; gap: 10px; }
.device-identity div { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.device-identity div:last-child { border-bottom: 0; padding-bottom: 0; }
.device-identity span { color: var(--muted); font-size: 13px; }
.device-identity strong, .device-identity code { text-align: right; word-break: break-word; }
.login-body { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #eef7ff, #edf9f5); padding: 20px; }
.login-card { width: min(430px, 100%); background: #fff; border: 1px solid #dfeaf3; border-radius: 8px; padding: 28px; box-shadow: 0 18px 50px rgba(23, 32, 51, .12); }
code { color: #0f766e; }
@media (max-width: 900px) {
    .app-shell { display: block; }
    .sidebar { width: 100%; height: auto; position: sticky; top: 0; z-index: 20; padding: 10px 12px 8px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.08); box-shadow: 0 10px 24px rgba(16, 24, 39, .16); }
    .brand { gap: 10px; }
    .brand-mark { width: 32px; height: 32px; }
    .brand strong { font-size: 14px; }
    .brand small { display: none; }
    .sidebar .nav, .sidebar .nav.flex-column { flex-direction: row !important; flex-wrap: nowrap; overflow-x: auto; margin-top: 9px; gap: 6px; padding-bottom: 2px; scrollbar-width: none; }
    .sidebar .nav::-webkit-scrollbar { display: none; }
    .sidebar .nav-link { flex: 0 0 auto; white-space: nowrap; padding: 7px 10px; font-size: 12px; border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.04); }
    .sidebar .nav-link.active { border-color: rgba(255,255,255,.16); }
    .content { padding: 14px; }
    .topbar { flex-direction: row; align-items: center; margin-bottom: 14px; }
    .topbar h1 { font-size: 20px; }
    .topbar p, .admin-chip { display: none; }
    .form-grid { grid-template-columns: 1fr; }
    .metric { min-height: 84px; padding: 12px; }
    .metric strong { font-size: 20px; }
    .panel { padding: 14px; }
    .table { font-size: 13px; }
    .btn { --bs-btn-padding-y: .42rem; --bs-btn-padding-x: .7rem; }
}