:root {
  --bg: #0f1419;
  --bg-elev: #1a222c;
  --bg-soft: #243040;
  --line: #334155;
  --text: #e8eef6;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #22c55e;
  --danger: #f43f5e;
  --warn: #f59e0b;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.16), transparent),
    radial-gradient(900px 500px at 100% 0%, rgba(34, 197, 94, 0.08), transparent),
    var(--bg);
  color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
.wrap { width: min(1100px, calc(100% - 32px)); margin: 0 auto; }
.hidden { display: none !important; }

.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.auth-card { width: min(420px, 100%); padding: 32px; }
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.logo {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 800;
  background: linear-gradient(135deg, #38bdf8, #22c55e); color: #062033;
}
h1, h2, h3 { margin: 0 0 8px; }
.muted { color: var(--muted); }
.stack { display: grid; gap: 12px; margin-top: 20px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="url"], input[type="range"] {
  width: 100%; border: 1px solid var(--line); background: #0c1218;
  color: var(--text); border-radius: 10px; padding: 12px 14px; font-size: 16px;
}
.btn {
  border: 0; border-radius: 12px; padding: 12px 16px; font-weight: 700;
  cursor: pointer; font-size: 15px; color: #062033;
}
.btn-primary { background: var(--accent); }
.btn-ok { background: var(--accent-2); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: var(--bg-soft); color: var(--text); }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.alert {
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.4);
  color: #fecdd3; padding: 10px 12px; border-radius: 10px;
}
.ok {
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.35);
  color: #bbf7d0; padding: 10px 12px; border-radius: 10px;
}

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 0 8px;
}
.grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 16px; margin: 20px 0 40px; }
.panel { padding: 22px; }
.status-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.stat { background: #111821; border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.stat b { display: block; font-size: 18px; margin-top: 4px; }
.code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 28px; letter-spacing: 4px; margin: 8px 0 0;
}
.map-frame {
  width: 100%; height: 280px; border: 0; border-radius: 12px; background: #0c1218;
}
.empty-map {
  height: 280px; display: grid; place-items: center; color: var(--muted);
  border: 1px dashed var(--line); border-radius: 12px;
}
.volume-box { display: flex; align-items: center; gap: 12px; }
.volume-box output { min-width: 42px; font-weight: 700; }
.hint { font-size: 13px; }

@media (max-width: 820px) {
  .grid, .status-grid { grid-template-columns: 1fr; }
  .code { font-size: 22px; }
}