:root {
  --bg: #0b1020;
  --panel: #121a30;
  --panel2: #0e1526;
  --line: #24304d;
  --text: #e7ecf5;
  --muted: #9fb0cc;
  --accent: #38bdf8;
  --ok: #22c55e;
  --error: #e11d48;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: var(--panel2);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; }

/* Language switch — same shape and behaviour as the Attack Runner's, so the two
   tools a participant uses side by side do not need learning twice. */
.topright { display: flex; align-items: center; gap: 12px; }
.lang-toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 8px;
               overflow: hidden; }
.lang-btn { color: var(--muted); font-size: 12px; font-weight: 700; text-decoration: none;
            padding: 3px 9px; }
.lang-btn + .lang-btn { border-left: 1px solid var(--line); }
.lang-btn.active { background: var(--accent); color: #06121f; }
.brand .logo { color: var(--accent); font-size: 22px; }
.tag { color: var(--muted); font-size: 13px; }

main { max-width: 980px; margin: 0 auto; padding: 24px; }
h1 { font-size: 22px; margin: 0 0 8px; }
h2 { font-size: 16px; margin: 0 0 12px; }
.intro { color: var(--muted); line-height: 1.5; }
.muted { color: var(--muted); font-size: 13px; }
code { background: #0a0f1e; padding: 2px 6px; border-radius: 6px; color: #cfe0ff; font-size: 13px; }

.banner { border-radius: 10px; padding: 10px 14px; font-size: 14px; margin: 14px 0; }
.banner.ok { background: rgba(34, 197, 94, .12); border: 1px solid rgba(34, 197, 94, .4); color: #bbf7d0; }
.banner.error { background: rgba(225, 29, 72, .12); border: 1px solid rgba(225, 29, 72, .4); color: #fecdd3; }

.panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; margin: 18px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }

.op-form { display: flex; flex-direction: column; gap: 12px; }
.op-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.op-form input, .unlock-form input {
  background: var(--panel2); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 11px; font-size: 14px;
}
.op-form input:focus, .unlock-form input:focus { outline: none; border-color: var(--accent); }
.btn-row { display: flex; gap: 10px; }

.btn {
  border: 1px solid var(--line); background: #172038; color: var(--text);
  border-radius: 8px; padding: 9px 14px; font-size: 14px; cursor: pointer;
}
.btn:hover { border-color: #3b4b74; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #06263a; font-weight: 700; }
.btn.primary:hover { filter: brightness(1.08); }

.allowed { margin: 14px 0 26px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.allowed code { font-size: 12px; }

.hist-title { margin-top: 26px; }
table.hist { width: 100%; border-collapse: collapse; font-size: 13px; }
table.hist th, table.hist td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
table.hist th { color: var(--muted); font-weight: 600; }
.act { font-weight: 700; }
.act-switch { color: var(--accent); }
.act-rollback { color: var(--ok); }

.unlock { max-width: 460px; margin: 40px auto; text-align: center; }
.unlock-form { display: flex; gap: 10px; margin-top: 18px; justify-content: center; }

footer { max-width: 980px; margin: 30px auto; padding: 16px 24px; color: var(--muted); font-size: 12px; border-top: 1px solid var(--line); }

/* Role banner + instructor claims list (host claims). */
.banner.role { background: rgba(56, 189, 248, .08); border: 1px solid rgba(56, 189, 248, .35); }
.claims { display: flex; flex-direction: column; gap: 6px; margin: 8px 0 16px; }
.claim-row { display: flex; align-items: center; gap: 10px; }