:root{--bg:#f4f7fb;--card:#ffffff;--text:#1a2332;--muted:#5c6b7f;--primary:#1565c0;--primary-hover:#0d47a1;--border:#d8e0ea;--error:#c62828;--success:#2e7d32;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:720px}.container,.container-wide{margin:0 auto;padding:24px 16px 48px}.container-wide{max-width:960px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:0 2px 8px rgba(26,35,50,.06)}.btn{display:inline-block;padding:10px 18px;border-radius:8px;border:none;font-size:15px;font-weight:600;cursor:pointer;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);text-decoration:none}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--primary);border:1px solid var(--border)}.field{margin-bottom:16px}.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:15px}.field small{color:var(--muted);font-size:13px}.error{color:var(--error);font-size:14px;margin:8px 0}.success{color:var(--success)}.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--card);border-bottom:1px solid var(--border)}.nav-brand{font-weight:700;font-size:18px;color:var(--text);text-decoration:none}.hero{text-align:center;padding:48px 16px 32px}.hero h1{font-size:2rem;margin:0 0 12px}.hero p{color:var(--muted);max-width:520px;margin:0 auto 24px}.steps{counter-reset:step;list-style:none;padding:0;margin:0}.steps li{counter-increment:step;margin-bottom:20px;padding-left:36px;position:relative}.steps li:before{content:counter(step);position:absolute;left:0;top:0;width:24px;height:24px;border-radius:50%;background:var(--primary);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}.code-block{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;font-family:ui-monospace,monospace;font-size:13px;overflow-x:auto;white-space:pre}.strength{height:4px;border-radius:2px;background:var(--border);margin-top:6px}.strength-bar{height:100%;border-radius:2px;transition:width .2s}.grid-2{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}@media (max-width:600px){.grid-2{grid-template-columns:1fr}}