:root{--bg:#f5f4f0;--surface:#fff;--ink:#1b1b1a;--muted:#5f5d57;--line:#dad6cc;--accent:#1f6f54;--accent-soft:#e3efe9;--on-accent:#fff;--warn:#b4541f;--radius:14px}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);margin:0;font-family:Be Vietnam Pro,system-ui,sans-serif;font-size:15px;line-height:1.5}a{color:var(--accent)}.wordmark{letter-spacing:-.8px;font-family:Space Grotesk,Be Vietnam Pro,sans-serif;font-weight:700}.wordmark i{color:var(--accent);font-style:normal}.wrap{flex-direction:column;gap:28px;max-width:960px;min-height:100dvh;margin:0 auto;padding:24px 16px 40px;display:flex}.top{justify-content:space-between;align-items:center;gap:12px;display:flex}.brand{font-size:36px;line-height:40px}.lang{border:1px solid var(--line);color:var(--ink);background:var(--surface);border-radius:999px;padding:8px 12px;font-weight:600;text-decoration:none}.hero h1{letter-spacing:-.5px;margin:0 0 12px;font-size:clamp(28px,6vw,44px);line-height:1.15}.hero p{color:var(--muted);max-width:640px;margin:0;font-size:17px}.cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;flex-direction:column;gap:10px;padding:20px;display:flex}.card h2{margin:0;font-size:18px}.card p{color:var(--muted);margin:0}.btn{min-height:48px;font:inherit;border:0;border-radius:14px;justify-content:center;align-items:center;padding:0 18px;font-weight:700;text-decoration:none;display:inline-flex}.btn.primary{background:var(--accent);color:var(--on-accent)}.btn[aria-disabled=true]{opacity:.55;cursor:not-allowed}.note{color:var(--muted);font-size:13px}.demo{border-style:dashed}.demo ul{margin:0;padding-left:18px}footer{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:auto;font-size:13px;display:flex}@media (width<=520px){.brand{font-size:30px;line-height:34px}}