:root{--gap: 12px}*{box-sizing:border-box}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,sans-serif;margin:0;color:#0f172a;background:#f8fafc}.container{max-width:860px;margin:24px auto;padding:0 16px}.card{background:#fff;border-radius:16px;padding:20px;box-shadow:0 4px 20px #0206170f}.row{display:grid;gap:var(--gap);grid-template-columns:1fr 1fr}.row-1{display:grid;gap:var(--gap)}label{font-weight:600;font-size:14px}input,textarea,select{width:100%;padding:10px 12px;border:1px solid #e2e8f0;border-radius:12px;font-size:14px;background:#fff}textarea{min-height:120px}button{padding:10px 14px;border-radius:12px;border:0;background:#0ea5e9;color:#fff;font-weight:700;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.block{margin-bottom:14px}.small{font-size:12px;color:#475569}.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#eef2ff;border-radius:8px;padding:2px 6px}.result{white-space:pre-wrap}.copy{background:#10b981}.download{background:#6366f1}