:root{color-scheme:dark;--bg:#070b12;--surface:#111827;--line:#2b3a52;--ink:#edf4ff;--muted:#9fb0c9;--accent:#62a7ff}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 30% 10%,#162a4b,var(--bg) 60%);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}.card{width:min(420px,calc(100% - 32px));padding:32px;border:1px solid var(--line);border-radius:16px;background:rgba(17,24,39,.96);box-shadow:0 18px 60px #0008}.card.wide{width:min(860px,calc(100% - 32px))}.brand{color:#8cc1ff;font-weight:600}h1{margin:10px 0 22px}label{display:block;margin:14px 0;color:var(--muted)}input,select{display:block;width:100%;margin-top:6px;padding:11px;border:1px solid var(--line);border-radius:8px;background:#0a1220;color:var(--ink);font:inherit}button{width:100%;margin-top:12px;padding:11px;border:0;border-radius:8px;background:var(--accent);color:#07101f;font:inherit;font-weight:700;cursor:pointer}#status{min-height:1.6em;color:#ffbf8b}.hint{color:var(--muted);font-size:14px}table{width:100%;margin-top:24px;border-collapse:collapse}th,td{padding:9px;border-bottom:1px solid var(--line);text-align:left}