:root {
  color-scheme: dark;
  --bg: #06111f;
  --sidebar: #071522;
  --surface: #0d2033;
  --surface-2: #112a40;
  --surface-3: #16344d;
  --border: #294762;
  --text: #f5f9fc;
  --muted: #a8bbcb;
  --accent: #55dcc7;
  --accent-strong: #2bbca9;
  --accent-ink: #03231f;
  --info: #6fc6ff;
  --success: #71e19c;
  --warning: #ffd16a;
  --danger: #ff8a95;
  --focus: #8bdcff;
  --shadow: 0 18px 48px rgba(0, 0, 0, .26);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; min-width: 320px; min-height: 100dvh; background: radial-gradient(circle at 75% -10%, #103150 0, transparent 32rem), var(--bg); color: var(--text); }
button, input, select { font: inherit; }
button, a, input, select { touch-action: manipulation; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: var(--info); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.skip-link { position: fixed; left: 12px; top: -80px; z-index: 1000; padding: 10px 14px; border-radius: 8px; background: var(--text); color: var(--bg); font-weight: 700; }
.skip-link:focus { top: 8px; }
.engineering-banner { min-height: 30px; display: grid; place-items: center; padding: 4px 16px; background: #f5c95b; color: #1e1705; font-size: 12px; font-weight: 800; letter-spacing: .04em; text-align: center; }
.shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: calc(100dvh - 30px); }

.sidebar { position: sticky; top: 0; height: calc(100dvh - 30px); display: flex; flex-direction: column; padding: 28px 14px 18px; border-right: 1px solid var(--border); background: color-mix(in srgb, var(--sidebar) 95%, transparent); }
.brand { display: flex; align-items: center; gap: 12px; padding: 8px 8px 28px; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 17px; }
.brand small { color: var(--muted); font-size: 12px; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(135deg, var(--accent), #58a9ff); color: #06222a; font-weight: 900; box-shadow: 0 9px 24px rgba(85, 220, 199, .2); }
.primary-nav { display: grid; gap: 6px; }
.primary-nav button, .mobile-nav button { border: 0; cursor: pointer; }
.primary-nav button { min-height: 48px; display: grid; grid-template-columns: 24px 1fr auto; align-items: center; gap: 8px; padding: 0 12px; border-radius: 12px; background: transparent; color: var(--muted); text-align: left; transition: background-color .18s ease, color .18s ease; }
.primary-nav button:hover { background: var(--surface); color: var(--text); }
.primary-nav button[aria-current="page"] { background: #123d3a; color: var(--text); box-shadow: inset 3px 0 var(--accent); }
.nav-count { min-width: 24px; padding: 2px 7px; border-radius: 999px; background: var(--surface-3); color: #d6e5ef; font-size: 11px; text-align: center; font-variant-numeric: tabular-nums; }
.sidebar-foot { margin-top: auto; display: flex; align-items: center; gap: 9px; padding: 13px; border: 1px solid var(--border); border-radius: 12px; color: var(--muted); font-size: 12px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #73879a; box-shadow: 0 0 0 4px rgba(115, 135, 154, .13); }
.sidebar-foot.connected .status-dot { background: var(--success); box-shadow: 0 0 0 4px rgba(113, 225, 156, .13); }

.workspace { min-width: 0; }
.topbar { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 28px; border-bottom: 1px solid var(--border); background: rgba(8, 24, 39, .78); backdrop-filter: blur(18px); }
.topbar strong, .topbar .eyebrow { display: block; }
.topbar strong { margin-top: 2px; }
.topbar-actions, .heading-actions { display: flex; align-items: center; gap: 10px; }
.eyebrow { color: var(--info); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.connection-pill { display: inline-flex; align-items: center; gap: 8px; min-height: 38px; padding: 0 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 13px; }
.connection-pill > .connection-dot { width: 7px; height: 7px; border-radius: 50%; background: #718497; }
.connection-pill.connected { color: var(--success); border-color: rgba(113, 225, 156, .35); background: rgba(113, 225, 156, .08); }
.connection-pill.connected > .connection-dot { background: var(--success); }

.degraded-banner { display: flex; align-items: center; gap: 12px; padding: 12px 28px; border-bottom: 1px solid rgba(255, 138, 149, .38); background: rgba(96, 26, 39, .82); color: #ffe7ea; }
.degraded-banner span { flex: 1; color: #ffc4ca; }
main { padding: 32px clamp(18px, 3vw, 42px) 80px; }
.view { max-width: 1440px; margin: 0 auto; }
.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 22px; margin-bottom: 24px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 4px; font-size: clamp(26px, 3vw, 36px); line-height: 1.2; letter-spacing: -.025em; }
h2 { margin-bottom: 4px; font-size: 17px; }
.page-heading p, .panel-heading p { margin-bottom: 0; color: var(--muted); }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 14px; border: 1px solid transparent; border-radius: 10px; cursor: pointer; text-decoration: none; font-weight: 700; font-size: 13px; transition: background-color .18s ease, border-color .18s ease, opacity .18s ease; }
.button.primary { background: var(--accent); color: var(--accent-ink); }
.button.primary:hover { background: #7ae7d5; }
.button.secondary { border-color: var(--border); background: var(--surface); color: var(--text); }
.button.secondary:hover, .button.ghost:hover { border-color: #48708f; background: var(--surface-2); }
.button.ghost { border-color: transparent; background: transparent; color: var(--info); }
.button:disabled { cursor: not-allowed; opacity: .42; }

.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 18px; }
.metric-card, .panel { border: 1px solid var(--border); border-radius: 15px; background: linear-gradient(145deg, rgba(17, 42, 64, .82), rgba(10, 29, 47, .9)); box-shadow: var(--shadow); }
.metric-card { min-height: 140px; display: flex; flex-direction: column; justify-content: center; padding: 20px; }
.metric-card > span { color: var(--muted); font-size: 13px; }
.metric-card strong { margin: 7px 0 2px; font-size: 30px; font-variant-numeric: tabular-nums; }
.metric-card small { color: var(--muted); }
.metric-card.warning strong { color: var(--warning); }
.content-grid, .operations-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(300px, .8fr); gap: 18px; }
.panel { padding: 18px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.health-list { display: grid; gap: 8px; }
.health-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 12px 13px; border: 1px solid rgba(74, 111, 140, .56); border-radius: 11px; background: rgba(4, 17, 29, .35); }
.health-item strong, .health-item small { display: block; }
.health-item small { margin-top: 2px; color: var(--muted); }
.health-item .value { color: var(--warning); font-weight: 800; font-variant-numeric: tabular-nums; }
.empty-compact { min-height: 100px; display: grid; place-items: center; padding: 18px; border: 1px dashed var(--border); border-radius: 11px; color: var(--muted); text-align: center; }
.boundary-card { position: relative; overflow: hidden; }
.boundary-card::after { content: ""; position: absolute; right: -45px; top: -45px; width: 130px; height: 130px; border-radius: 50%; background: rgba(85, 220, 199, .09); }
.boundary-label, .feature-state { display: inline-flex; padding: 4px 8px; border-radius: 999px; background: rgba(85, 220, 199, .12); color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .05em; }
.boundary-card h2 { margin-top: 14px; }
.boundary-card p, .boundary-card li { color: var(--muted); }
.boundary-card ul { padding-left: 18px; margin-bottom: 0; }

.monitor-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.monitor-toolbar strong, .monitor-toolbar span { display: block; }
.monitor-toolbar span { color: var(--muted); font-size: 13px; }
.preview-grid { min-height: 500px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.preview-empty { grid-column: 1 / -1; min-height: 500px; display: grid; align-content: center; justify-items: center; padding: 30px; border: 1px dashed var(--border); border-radius: 15px; background: rgba(7, 20, 33, .55); color: var(--muted); text-align: center; }
.preview-empty > span { width: 58px; height: 58px; display: grid; place-items: center; margin-bottom: 14px; border: 1px solid var(--border); border-radius: 50%; color: var(--accent); font-size: 24px; }
.preview-empty strong { color: var(--text); font-size: 18px; }
.preview-empty p { margin: 4px 0 0; }
.preview-card { overflow: hidden; border: 1px solid var(--border); border-radius: 15px; background: #02070b; box-shadow: var(--shadow); }
.preview-frame { position: relative; aspect-ratio: 16 / 9; background: #02070b; }
.preview-frame iframe { width: 100%; height: 100%; display: block; border: 0; }
.preview-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; background: var(--surface); }
.preview-meta strong, .preview-meta small { display: block; }
.preview-meta small { color: var(--muted); }

.filter-panel { display: grid; grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(140px, .7fr)) auto; align-items: end; gap: 12px; margin-bottom: 14px; }
label > span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 12px; font-weight: 700; }
input, select { width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--border); border-radius: 9px; background: #081927; color: var(--text); }
input::placeholder { color: #72899c; }
select { cursor: pointer; }
.table-panel { padding: 0; overflow: hidden; }
.table-status { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--muted); font-size: 13px; }
.device-table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 900px; }
th, td { padding: 13px 14px; border-bottom: 1px solid rgba(41, 71, 98, .75); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-size: 11px; letter-spacing: .04em; }
td { font-size: 13px; }
td strong, td small { display: block; }
td small { margin-top: 2px; color: var(--muted); }
tbody tr:hover { background: rgba(34, 66, 92, .34); }
.select-preview { width: 44px; height: 44px; display: grid; place-items: center; border: 0; }
.select-preview input { width: 18px; min-height: auto; height: 18px; accent-color: var(--accent); }
.status-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 11px; font-weight: 800; white-space: nowrap; }
.status-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-badge.success { color: var(--success); border-color: rgba(113, 225, 156, .35); background: rgba(113, 225, 156, .08); }
.status-badge.warning { color: var(--warning); border-color: rgba(255, 209, 106, .35); background: rgba(255, 209, 106, .08); }
.status-badge.danger { color: var(--danger); border-color: rgba(255, 138, 149, .35); background: rgba(255, 138, 149, .08); }
.device-cards { display: none; }
.pagination { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 10px 14px; }
.pagination > span { color: var(--muted); font-size: 13px; }
.pagination > div { display: flex; gap: 8px; }

.honest-empty { max-width: 820px; min-height: 340px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: clamp(28px, 5vw, 60px); }
.honest-empty h2 { margin: 18px 0 8px; font-size: 24px; }
.honest-empty > p { max-width: 70ch; color: var(--muted); }
.next-list { width: 100%; display: grid; gap: 8px; margin-top: 14px; }
.next-list span { padding: 12px; border: 1px solid var(--border); border-radius: 10px; color: var(--muted); }
.next-list strong { margin-right: 10px; color: var(--text); }

dialog { width: min(520px, calc(100% - 28px)); padding: 0; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); color: var(--text); box-shadow: 0 30px 90px rgba(0, 0, 0, .6); }
dialog::backdrop { background: rgba(0, 7, 13, .72); backdrop-filter: blur(4px); }
dialog form { padding: 22px; }
.dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.dialog-heading h2 { margin-top: 5px; font-size: 22px; }
.icon-button { min-width: 44px; min-height: 44px; border: 1px solid var(--border); border-radius: 10px; background: transparent; cursor: pointer; font-size: 20px; }
dialog p { color: var(--muted); }
dialog label { display: block; margin-top: 14px; }
.form-error { margin-top: 12px; padding: 10px 12px; border: 1px solid rgba(255, 138, 149, .5); border-radius: 9px; background: rgba(120, 28, 43, .28); color: #ffdce0; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }
.toast { position: fixed; right: 20px; bottom: 24px; z-index: 200; max-width: min(420px, calc(100% - 40px)); padding: 13px 16px; border: 1px solid var(--border); border-radius: 11px; background: #173148; color: var(--text); box-shadow: var(--shadow); }
.mobile-nav { display: none; }

@media (max-width: 1080px) {
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-grid, .operations-grid { grid-template-columns: 1fr; }
  .filter-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .engineering-banner { min-height: 38px; }
  .shell { display: block; min-height: calc(100dvh - 38px); }
  .sidebar { display: none; }
  .topbar { min-height: 72px; padding: 12px 16px; }
  .connection-pill { display: none; }
  .topbar-actions .button { min-height: 44px; }
  .degraded-banner { align-items: flex-start; flex-wrap: wrap; padding: 12px 16px; }
  .degraded-banner span { flex-basis: calc(100% - 10px); }
  main { padding: 24px 14px 92px; }
  .page-heading { align-items: stretch; flex-direction: column; }
  .page-heading .button, .heading-actions { width: 100%; }
  .heading-actions .button { flex: 1; }
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
  .metric-card { min-height: 126px; padding: 15px; }
  .metric-card strong { font-size: 25px; }
  .panel { padding: 15px; }
  .panel-heading, .monitor-toolbar { align-items: stretch; flex-direction: column; }
  .preview-grid { grid-template-columns: 1fr; min-height: 420px; }
  .preview-empty { min-height: 420px; }
  .filter-panel { grid-template-columns: 1fr; }
  input, select { min-height: 46px; font-size: 16px; }
  .device-table-wrap { display: none; }
  .device-cards { display: grid; gap: 10px; padding: 12px; }
  .device-card { padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: rgba(5, 18, 30, .45); }
  .device-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
  .device-card strong, .device-card small { display: block; }
  .device-card small { color: var(--muted); }
  .device-card dl { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 14px 0 0; }
  .device-card dt { color: var(--muted); font-size: 11px; }
  .device-card dd { margin: 2px 0 0; font-size: 13px; }
  .pagination { align-items: stretch; flex-direction: column; }
  .pagination > div { display: grid; grid-template-columns: 1fr 1fr; }
  .pagination .button { min-height: 44px; }
  .mobile-nav { position: fixed; left: 8px; right: 8px; bottom: 8px; z-index: 100; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); padding: 6px; border: 1px solid var(--border); border-radius: 15px; background: rgba(8, 24, 39, .96); box-shadow: 0 15px 40px rgba(0, 0, 0, .5); backdrop-filter: blur(18px); }
  .mobile-nav button { min-height: 48px; border-radius: 10px; background: transparent; color: var(--muted); font-size: 12px; }
  .mobile-nav button[aria-current="page"] { background: #153c3a; color: var(--accent); font-weight: 800; }
  dialog form { padding: 18px; }
  .dialog-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .dialog-actions .button { min-height: 46px; }
  .toast { left: 14px; right: 14px; bottom: 78px; max-width: none; }
}

@media (max-width: 420px) {
  .metric-grid { grid-template-columns: 1fr; }
  .topbar { gap: 8px; }
  .topbar strong { max-width: 170px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}