:root{--ink: #14181d;--muted: #5b6672;--line: #d3d9e0;--surface: #ffffff;--page: #eef1f4;--accent: #1c4f8b;--warn: #8a5200;--warn-bg: #fff4e0;--danger: #8c1d1d;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;background:var(--page);color:var(--ink);font-family:Heebo,Rubik,system-ui,-apple-system,Segoe UI,sans-serif;min-height:100dvh}button{font:inherit;cursor:pointer;border-radius:10px;border:1.5px solid var(--accent);background:var(--accent);color:#fff;min-height:44px;padding:0 18px;font-weight:700}button.ghost{background:transparent;color:var(--accent)}button:disabled{opacity:.55;cursor:default}.centre{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px;text-align:center}.pair h1{margin:0;font-size:26px}.pair .lede{max-width:34rem;color:var(--muted);line-height:1.6;margin:0}.pair .primary-link{display:flex;align-items:center;justify-content:center;min-height:56px;min-width:min(22rem,100%);padding:0 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