:root{--ink:#16202b;--muted:#5b6b7c;--line:#d8dfe6;--ground:#f5f7f9;--panel:#fff;--accent:#1b4c7a;--warn:#8a4b12}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--ground);color:var(--ink);font:15px/1.55 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}main{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:32px;max-width:460px;width:100%}h1{font-size:20px;margin:0 0 4px;letter-spacing:-.01em}.sub{margin:0 0 24px;font-size:14px}.note,.sub{color:var(--muted)}.note{font-size:13px;margin-top:20px}.problem{color:var(--warn);background:#fdf6ee;border:1px solid #e8d6bd;border-radius:6px;padding:12px 14px;font-size:13px}button.primary{width:100%;padding:11px 16px;font:inherit;font-weight:600;color:#fff;background:var(--accent);border:1px solid var(--accent);border-radius:6px;cursor:pointer}button.primary:disabled{opacity:.45;cursor:not-allowed}button.quiet{padding:7px 12px;font:inherit;font-size:13px;color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:6px;cursor:pointer}dl{margin:0;font-size:13px}dt{color:var(--muted);float:left;clear:left;width:130px}dd{margin:0 0 6px 130px}