*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif;margin:0;line-height:1.6}
header{padding:16px 20px;border-bottom:1px solid #e5e7eb}
.container{max-width:980px;margin:0 auto;padding:20px}
h1,h2{line-height:1.2}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{border:1px solid #e5e7eb;border-radius:12px;padding:16px}
.card h3{margin-top:0}
input,textarea,button,select{font:inherit;padding:10px;border:1px solid #d1d5db;border-radius:8px;width:100%}
button{cursor:pointer}
.ad-slot{border:2px dashed #d1d5db;border-radius:12px;padding:16px;text-align:center;font-size:.9rem;margin:16px 0}
footer{padding:24px 20px;border-top:1px solid #e5e7eb;margin-top:32px;font-size:.9rem;color:#555}
.small{font-size:.9rem;color:#666}
.badge{display:inline-block;padding:4px 8px;border:1px solid #e5e7eb;border-radius:999px;font-size:.8rem;margin-right:6px}
kbd{border:1px solid #ccc;border-bottom-width:2px;border-radius:6px;padding:1px 6px;background:#fafafa}