:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c232d;
  --line: #263040;
  --ink: #e6edf3;
  --muted: #8b98a9;
  --accent: #ff3b30;      /* e-paper red */
  --accent-2: #37d67a;    /* online / ok */
  --warn: #f0a020;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); }
body { min-height: 100vh; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #12171e, #0e1116);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .dot { width: 12px; height: 12px; border-radius: 3px; background: var(--accent); box-shadow: 0 0 14px var(--accent); }
.brand strong { font-size: 17px; letter-spacing: .3px; }
.brand em { display: block; font-style: normal; color: var(--muted); font-size: 12px; }

.pill { font-family: var(--mono); font-size: 12px; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--panel); color: var(--muted); }
.pill.on { color: #041; background: var(--accent-2); border-color: transparent; font-weight: 700; }
.pill.off { color: #400; background: var(--accent); border-color: transparent; font-weight: 700; }

.tabs { display: flex; gap: 4px; padding: 10px 18px 0; border-bottom: 1px solid var(--line); }
.tabs button {
  background: none; border: none; color: var(--muted); padding: 10px 16px; cursor: pointer;
  font-size: 14px; border-bottom: 2px solid transparent; border-radius: 6px 6px 0 0;
}
.tabs button:hover { color: var(--ink); background: var(--panel); }
.tabs button.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

main { padding: 22px; max-width: 1200px; margin: 0 auto; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px; margin-bottom: 18px; }
.card h2 { margin: 0 0 4px; font-size: 15px; }
.card .hint { color: var(--muted); font-size: 12.5px; margin: 0 0 14px; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
input, select, textarea {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);
  border-radius: 8px; padding: 9px 11px; font-size: 14px; font-family: inherit; min-width: 120px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

button.btn {
  background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: 9px 15px;
  font-size: 13.5px; font-weight: 600; cursor: pointer;
}
button.btn.ghost { background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); }
button.btn.sm { padding: 6px 10px; font-size: 12px; }
button.btn:hover { filter: brightness(1.08); }
button.btn:disabled { opacity: .5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .4px; }
td.mac, td .mac { font-family: var(--mono); font-size: 12.5px; }
tr:hover td { background: rgba(255,255,255,.02); }

.badge { font-size: 11px; padding: 3px 8px; border-radius: 999px; font-weight: 600; }
.badge.on { background: rgba(55,214,122,.15); color: var(--accent-2); }
.badge.off { background: rgba(255,59,48,.15); color: var(--accent); }
.badge.mut { background: var(--panel-2); color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }

.tag-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.tag-card .mac { font-family: var(--mono); font-weight: 700; font-size: 14px; }
.tag-card .meta { color: var(--muted); font-size: 12px; margin: 6px 0 10px; }
.preview-wrap { background: #fff; border-radius: 6px; padding: 6px; display: inline-block; margin-top: 8px; }
.preview-wrap img { display: block; image-rendering: pixelated; }

.empty { color: var(--muted); text-align: center; padding: 40px; font-size: 14px; }
.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(120%);
  background: #fff; color: #111; padding: 12px 18px; border-radius: 10px; font-size: 13.5px; font-weight: 600;
  transition: transform .25s; box-shadow: 0 8px 30px rgba(0,0,0,.4); z-index: 50; max-width: 80vw; }
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--accent); color: #fff; }
code { font-family: var(--mono); background: var(--panel-2); padding: 1px 6px; border-radius: 5px; font-size: 12.5px; }
.spacer { flex: 1; }