:root{--brand:#0b3d2e;--brand-soft:#f0f7f3;--border:#e6ece9;--text:#1a2320;--muted:#667}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:#f7faf8;-webkit-font-smoothing:antialiased}h1{font-size:1.6rem;margin:0 0 .5rem}h1,h2{color:var(--brand)}h2{font-size:1.15rem;margin:0 0 .75rem}a{color:var(--brand)}.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1rem 1.1rem}.section{margin-top:1.5rem}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:8px;background:var(--brand);color:#fff;font-weight:600;font-size:14px;padding:.55rem 1rem;cursor:pointer}.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}.btn:disabled{opacity:.55;cursor:not-allowed}.muted{color:var(--muted)}@media (max-width:560px){h1{font-size:1.35rem}.card{padding:.85rem}}