:root{--bg:#f7f8fa;--card:#ffffff;--muted:#666;--accent:#0f172a;--danger:#ff4d4f}*{box-sizing:border-box}html,body,#root{height:100%}body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);margin:0;padding:24px}.app-container{max-width:820px;margin:32px auto;background:transparent}h1{font-size:28px;margin:0 0 6px}.muted{color:var(--muted);margin:0 0 12px}.note-form{display:flex;flex-direction:column;gap:8px;margin-top:12px}.note-form input,.note-form textarea{padding:10px;border-radius:8px;border:1px solid #e6e9ee;font-size:14px}.note-form textarea{min-height:96px}.btn-primary{padding:8px 12px;border-radius:8px;border:0;background:#111;color:#fff}.btn-danger{padding:6px 8px;border-radius:6px;border:0;background:var(--danger);color:#fff}.note-list{margin-top:20px;padding:0;list-style:none}.note-card{padding:14px;border:1px solid #eee;border-radius:8px;margin-top:12px;background:var(--card)}.note-header{display:flex;justify-content:space-between;align-items:center}.note-title{font-weight:700}.note-meta{font-size:12px;color:var(--muted)}.expand-btn{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;border:0;background:transparent;color:#111;font-size:14px;cursor:pointer;padding:0}.expand-btn:hover{background:#f0f2f5}.note-body{margin-top:12px;white-space:pre-wrap;background:#fbfbfb;padding:12px;border-radius:6px;border:1px solid #f0f0f0}@media (max-width:600px){body{padding:12px}.app-container{margin:16px auto}}