:root{--bg:#f6f7fb;--card:#fff;--text:#171a21;--muted:#626b7a;--line:#dfe3ea;--brand:#5b4bdb;--brand2:#4637bd;--ok:#1f7a4c;--warn:#a45b00;--bad:#a33030;--radius:16px}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:var(--brand);text-decoration:none}header{background:#fff;border-bottom:1px solid var(--line)}.wrap{width:min(100% - 32px,960px);margin:auto}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0}.brand{font-weight:800;color:var(--text)}nav{display:flex;gap:14px;flex-wrap:wrap}main{padding:28px 0 48px}.hero{margin-bottom:22px}.eyebrow{font-size:.84rem;font-weight:700;color:var(--brand);text-transform:uppercase;letter-spacing:.06em}.hero h1{font-size:clamp(1.8rem,5vw,3rem);line-height:1.08;margin:.3rem 0 .7rem}.hero p{color:var(--muted);max-width:720px}.grid{display:grid;grid-template-columns:1fr;gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 8px 24px rgba(23,26,33,.04)}.card h2,.card h3{margin-top:0}.tool-link{display:block;color:inherit}.tool-link:hover{border-color:#c9c3ff}.form-grid{display:grid;grid-template-columns:1fr;gap:14px}label{display:block;font-weight:700;font-size:.93rem;margin-bottom:6px}.hint{display:block;color:var(--muted);font-weight:400;font-size:.82rem;margin-top:3px}input,select{width:100%;padding:12px 13px;border:1px solid #cfd5df;border-radius:12px;background:#fff;font:inherit;color:inherit}input:focus,select:focus{outline:3px solid rgba(91,75,219,.14);border-color:var(--brand)}button{width:100%;border:0;border-radius:12px;padding:13px 16px;font:inherit;font-weight:800;background:var(--brand);color:#fff;cursor:pointer}button:hover{background:var(--brand2)}.result{margin-top:18px;display:none}.result.show{display:block}.status{display:inline-block;padding:6px 10px;border-radius:999px;font-weight:800;font-size:.86rem;background:#eee}.status.ok{background:#e8f6ef;color:var(--ok)}.status.warn{background:#fff2df;color:var(--warn)}.status.bad{background:#fdeaea;color:var(--bad)}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.metric{background:#f8f9fc;border:1px solid var(--line);border-radius:12px;padding:12px}.metric b{display:block;font-size:1.15rem}.metric span{font-size:.82rem;color:var(--muted)}.note{font-size:.88rem;color:var(--muted);margin-top:12px}.error{color:var(--bad);font-weight:700;margin-top:10px}.footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:.9rem}.footer-links{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:8px}@media(min-width:720px){.grid.cols3{grid-template-columns:repeat(3,1fr)}.form-grid.two{grid-template-columns:repeat(2,1fr)}button{width:auto;min-width:180px}.metrics{grid-template-columns:repeat(3,1fr)}}