:root{--bg: #0b1f24;--panel: #103038;--ink: #e7f3f1;--muted: #9fc1bd;--accent: #2dd4bf;--accent-ink: #04201c;--line: #1d4a52;--good: #34d399;--bad: #f87171;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}#root{min-height:100vh}main{max-width:960px;margin:0 auto;padding:16px}main.join,main.screen{max-width:720px}h1,h2,h3{color:#fff;line-height:1.2}a{color:var(--accent)}button{background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:8px 12px;font-size:1rem;font-weight:600;cursor:pointer;margin:2px;min-height:40px}button:hover{filter:brightness(1.08)}button:disabled{opacity:.45;cursor:not-allowed}input,select{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:1rem;margin:2px 4px 2px 0}label{display:inline-block;color:var(--muted)}fieldset{border:1px solid var(--line);border-radius:10px;margin:12px 0;background:var(--panel)}legend{color:var(--accent);font-weight:700}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line)}p[role=alert]{color:var(--bad)}[role=status]{color:var(--good)}.screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh}.screen h1{font-size:clamp(2rem,6vw,4rem)}.code-big{font-variant-numeric:tabular-nums}main.join button{min-height:48px;font-size:1.1rem}