:root{--bg: #f5f4ef;--ink: #1f2a2e;--muted: #5e6a70;--card: #ffffff;--line: #d6d9dc;--accent: #05668d}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,Avenir Next,Segoe UI,sans-serif;background:radial-gradient(circle at top right,#dbeef5,transparent 45%),var(--bg);color:var(--ink)}main{max-width:980px;margin:0 auto;padding:2rem 1rem 3rem}header h1{margin:0;font-size:2rem}header p{margin-top:.35rem;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem;margin-top:1.5rem}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1rem}.status{font-weight:600}.good{color:#217346}.bad{color:#a6322f}label{display:block;font-size:.9rem;margin-bottom:.3rem}input,button,textarea{width:100%;padding:.62rem .7rem;border:1px solid var(--line);border-radius:10px;font-size:.95rem}button{background:var(--accent);border:none;color:#fff;font-weight:600;cursor:pointer}button:hover{filter:brightness(.95)}.stack{display:grid;gap:.8rem}.mono{font-family:SF Mono,Consolas,monospace;font-size:.83rem;white-space:pre-wrap;max-height:260px;overflow:auto;background:#f6f8f9;padding:.8rem;border-radius:10px}