:root {
  --bg: #0b1220;
  --card: #121b2e;
  --line: #22304d;
  --text: #e8eefc;
  --muted: #9fb0d0;
  --accent: #2dd4bf;
  --danger: #f87171;
  --ok: #4ade80;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 50% -10%, #17264a 0%, var(--bg) 60%);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
  display: flex;
  flex-direction: column;
}
header, main, footer { width: 100%; max-width: 980px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 26px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--accent); text-decoration: none; font-size: 1.05rem; }
.tag { color: var(--muted); font-size: .85rem; border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; }
main { flex: 1; padding-top: 34px; padding-bottom: 34px; }
h1 { font-size: clamp(1.6rem, 5vw, 2.2rem); margin: 0 0 8px; line-height: 1.2; }
.sub { color: var(--muted); margin: 0 0 26px; max-width: 60ch; }
.narrow { max-width: 640px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; margin-bottom: 18px; }
.grid .card { margin-bottom: 0; }
.card h2 { margin: 0 0 6px; font-size: 1.1rem; color: var(--accent); }
.card p.lead { margin: 0 0 8px; color: var(--muted); font-size: .95rem; }
label { display: block; margin: 14px 0 6px; font-weight: 600; font-size: .95rem; }
input, select, textarea {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--text);
  background: #0d1627; border: 1px solid var(--line); border-radius: 10px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { min-height: 130px; resize: vertical; }
button, .btn {
  display: block; width: 100%; margin-top: 18px; padding: 13px 18px;
  background: var(--accent); color: #04201c; font: inherit; font-weight: 700;
  border: 0; border-radius: 12px; cursor: pointer; text-align: center; text-decoration: none;
}
button:hover, .btn:hover, button:focus-visible, .btn:focus-visible { background: #5eead4; outline: none; }
button.secondary, .btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--line); }
button.secondary:hover, .btn.secondary:hover { background: #17264a; }
.alert { padding: 12px 14px; border-radius: 10px; margin-bottom: 14px; border: 1px solid; }
.alert.err { color: var(--danger); border-color: #7f1d1d; background: #2a1215; }
.alert.ok  { color: var(--ok); border-color: #14532d; background: #0f2418; }
dl { margin: 0; display: grid; grid-template-columns: 120px 1fr; gap: 10px 14px; }
dt { color: var(--muted); } dd { margin: 0; }
ul { margin: 0; padding-left: 20px; } li { margin-bottom: 6px; }
a.link { color: var(--accent); }
.hint { color: var(--muted); font-size: .88rem; margin: 10px 0 0; }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }
iframe { width: 100%; height: 72vh; min-height: 480px; border: 1px solid var(--line); border-radius: 12px; background: #000; margin-bottom: 14px; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.row { display: flex; gap: 10px; }
.row input { flex: 1; }
.row button { width: auto; margin-top: 0; padding: 0 18px; }
.badge { font-size: .8rem; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--line); }
.badge.on { color: var(--ok); border-color: #14532d; }
.badge.off { color: var(--danger); border-color: #7f1d1d; }
footer { padding-bottom: 28px; color: var(--muted); font-size: .85rem; text-align: center; line-height: 1.9; }
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  dl { grid-template-columns: 1fr; gap: 2px; } dt { margin-top: 8px; }
  iframe { height: 62vh; }
}