:root{--bg:#f7f8fb;--card:#fff;--ink:#1b2230;--muted:#5b6678;--line:#e4e8f0;--brand:#2f5bd0;--brand-ink:#fff;--ok:#1f9d57;--warn:#c9871f;--top:#7b3fe4;--radius:12px;--shadow:0 1px 3px #141e3c14, 0 6px 24px #141e3c0d}*{box-sizing:border-box}html,body{margin:0;padding:0}body{color:var(--ink);background:var(--bg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}.app{flex-direction:column;min-height:100vh;display:flex}header{background:var(--card);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1.5rem;display:flex}.brand{color:var(--ink);font-size:1.1rem;font-weight:700;text-decoration:none}nav{align-items:center;gap:1rem;display:flex}nav a{color:var(--ink);font-weight:500;text-decoration:none}nav a:hover{color:var(--brand)}.who{color:var(--muted);font-size:.9rem}main{flex:1;width:100%;max-width:920px;margin:0 auto;padding:2rem 1.5rem}footer{border-top:1px solid var(--line);color:var(--muted);text-align:center;padding:1.2rem 1.5rem;font-size:.9rem}h1{margin:0 0 .5rem;font-size:1.9rem}h2{font-size:1.3rem}a.cta,button.btn{background:var(--brand);color:var(--brand-ink);cursor:pointer;border:none;border-radius:8px;padding:.6rem 1.1rem;font-size:1rem;font-weight:600;text-decoration:none;display:inline-block}a.cta:hover,button.btn:hover{color:var(--brand-ink);filter:brightness(1.05)}button.linkbtn{color:var(--ink);font:inherit;cursor:pointer;background:0 0;border:none;padding:0;font-weight:500}button.linkbtn:hover{color:var(--brand)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem}.stack{gap:1rem;display:grid}form.auth{gap:.9rem;max-width:420px;display:grid}label{gap:.3rem;font-size:.95rem;font-weight:500;display:grid}input{border:1px solid var(--line);border-radius:8px;padding:.6rem .7rem;font-size:1rem}input:focus{outline:2px solid var(--brand);border-color:var(--brand)}.error{color:#b3261e;margin:0;font-size:.9rem}.muted{color:var(--muted)}