:root { --danger:#b00020; --ok:#1b8a2f; --bg:#101317; --card:#1a1f26; --fg:#e8eaed; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, "Segoe UI", sans-serif; background:var(--bg); color:var(--fg); }
header { display:flex; align-items:center; justify-content:space-between; padding:12px 16px; background:#0a0c0f; }
h1 { font-size:20px; margin:0; }
h2 { font-size:15px; opacity:.8; margin:18px 16px 6px; }
.badge { font-size:13px; padding:4px 10px; border-radius:999px; }
.badge.on { background:var(--ok); }
.badge.off { background:#555; }

.gate { max-width:560px; margin:40px auto; padding:24px; text-align:center; background:var(--card); border-radius:12px; }
.gate button { font-size:18px; padding:14px 22px; border:0; border-radius:10px; background:var(--ok); color:#fff; cursor:pointer; }
.warn { color:#f0b400; font-size:13px; margin-top:16px; }

.banner { margin:16px; padding:28px 16px; border-radius:12px; text-align:center; font-size:22px; font-weight:700; }
.banner.idle { background:var(--card); color:#9aa0a6; }
.banner.alarm { background:var(--danger); color:#fff; animation: flash .6s steps(1) infinite; }
@keyframes flash { 50% { background:#7a0016; } }

.controls { display:flex; gap:12px; margin:0 16px; }
.big { flex:1; font-size:18px; padding:18px; border:0; border-radius:12px; cursor:pointer; background:#2a313a; color:#fff; }
.big.danger { background:var(--danger); }

.log, .nodes { list-style:none; margin:0 16px; padding:0; }
.log li { background:var(--card); padding:8px 12px; border-radius:8px; margin-bottom:6px; font-size:13px; font-family:ui-monospace, monospace; }

.gate input { display:block; width:100%; margin:8px 0; padding:10px; border-radius:8px; border:1px solid #333; background:#0d0f12; color:var(--fg); }
.small { font-size:13px; padding:6px 12px; border:0; border-radius:8px; background:#2a313a; color:#fff; margin:0 16px 8px; cursor:pointer; }

.node-card { background:var(--card); margin:0 16px 10px; padding:12px; border-radius:10px; }
.node-head { display:flex; align-items:center; gap:10px; margin-bottom:8px; }
.node-head .sync { font-size:12px; opacity:.8; margin-left:auto; }
.node-card label { display:flex; justify-content:space-between; align-items:center; gap:8px; font-size:12px; margin:4px 0; opacity:.9; }
.node-card input { width:55%; padding:6px; border-radius:6px; border:1px solid #333; background:#0d0f12; color:var(--fg); }
.node-card .save { margin-top:8px; padding:8px 14px; border:0; border-radius:8px; background:var(--ok); color:#fff; cursor:pointer; }