:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,sans-serif;line-height:1.5;color:#1a1a1a;background:#f4f6f8}*{box-sizing:border-box}body{margin:0}a{color:#2563eb}.center{min-height:100vh;display:flex;align-items:center;justify-content:center}.layout{max-width:720px;margin:0 auto;padding:1rem 1rem 3rem}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.header h1{margin:0;font-size:1.25rem}.header-actions{display:flex;align-items:center;gap:.75rem}.card{background:#fff;border-radius:8px;padding:1.25rem 1.5rem;margin-bottom:1rem;box-shadow:0 1px 3px #00000014}.card h2{margin-top:0;font-size:1.1rem}label{display:block;font-size:.875rem;margin-bottom:.35rem;font-weight:500}input{width:100%;padding:.5rem .65rem;border:1px solid #cbd5e1;border-radius:6px;margin-bottom:.75rem;font-size:1rem}button{padding:.5rem 1rem;border-radius:6px;border:none;background:#2563eb;color:#fff;font-weight:600;cursor:pointer;font-size:.95rem}button:disabled{opacity:.6;cursor:not-allowed}button.secondary{background:#64748b;margin-bottom:.75rem}.muted{color:#64748b;font-size:.9rem}.small{font-size:.8rem}.error{color:#b91c1c}.success{color:#15803d}.result h3{margin-bottom:.5rem}.content-preview{white-space:pre-wrap;word-break:break-word;background:#f8fafc;padding:1rem;border-radius:6px;font-size:.9rem;max-height:320px;overflow:auto}.post-list{list-style:none;padding:0;margin:0}.post-item{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;padding:.75rem 0;border-bottom:1px solid #e2e8f0}.post-item:last-child{border-bottom:none}