:root{--bg: #ffffff;--fg: #16181d;--muted: #6b7280;--accent: #1d4ed8;--border: #e5e7eb;font-family:system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);line-height:1.6}.container{max-width:1080px;margin:0 auto;padding:0 20px}nav{border-bottom:1px solid var(--border)}nav .container{display:flex;gap:20px;align-items:center;height:60px}nav a{color:var(--fg);text-decoration:none;font-size:14px}nav a.brand{font-weight:700;font-size:16px;margin-right:auto}main{padding:40px 0}button,.btn{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:10px 18px;font-size:14px;cursor:pointer}input{border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;width:100%}.card{border:1px solid var(--border);border-radius:12px;padding:24px}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}.muted{color:var(--muted);font-size:13px}form{display:grid;gap:12px;max-width:380px}