body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;max-width:920px;margin:40px auto;padding:0 16px;line-height:1.5}
header{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
nav a{margin-right:10px}
.card{border:1px solid #e5e7eb;border-radius:12px;padding:16px;margin:16px 0}
label{display:block;margin:8px 0 4px}
input,textarea,select{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:10px}
button{padding:10px 14px;border:0;border-radius:10px;background:#111827;color:#fff;cursor:pointer}
small{color:#6b7280}