:root{--bg:#f6f7fb;--card:#fff;--text:#152033;--muted:#667085;--border:#dde3ee;--primary:#14213d;--soft:#eef2f8;--danger:#b42318;--ok:#067647}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}main{max-width:1060px;margin:0 auto;padding:32px 18px 56px}.hero{margin-bottom:22px}h1{font-size:32px;margin:0 0 8px;letter-spacing:-.03em}p{line-height:1.6}.grid{display:grid;grid-template-columns:1.05fr .95fr;grid-gap:18px;gap:18px}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 10px 25px rgba(20,33,61,.06)}.field{margin-bottom:16px}label{display:block;font-weight:700;margin-bottom:7px}input{width:100%;border:1px solid var(--border);padding:13px 14px;border-radius:12px;font-size:16px}.hint{color:var(--muted);font-size:13px;margin-top:6px}.row{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}button{border:none;background:var(--primary);color:#fff;padding:13px 16px;border-radius:12px;font-weight:700;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}button.secondary{color:var(--primary);background:var(--soft)}button.small{padding:8px 10px;font-size:13px;white-space:nowrap}.result{background:var(--soft);border-radius:16px;padding:18px;margin-top:16px}.big{font-size:34px;font-weight:800;letter-spacing:-.03em}.muted{color:var(--muted)}.ok{color:var(--ok)}.error,.ok{font-weight:700}.error{color:var(--danger)}table{width:100%;border-collapse:collapse;margin-top:14px;font-size:14px}td,th{border-bottom:1px solid var(--border);padding:10px 8px;text-align:left}th{color:var(--muted);font-size:12px;text-transform:uppercase}.notice{border-left:4px solid var(--primary);padding:12px 14px;background:var(--soft);border-radius:10px;margin-top:14px}.section-card{margin-top:18px}.section-header{align-items:start;display:grid;grid-gap:16px;gap:16px;grid-template-columns:1fr auto}.section-header h2{margin-bottom:6px}.section-header p{margin-top:0}.history-controls{display:grid;grid-gap:10px;gap:10px;grid-template-columns:180px 110px}.pill{background:var(--soft);border:1px solid var(--border);border-radius:999px;display:inline-block;font-size:13px;font-weight:700;padding:5px 9px}.table-wrap{overflow-x:auto}@media (max-width:820px){.grid,.history-controls,.row,.section-header{grid-template-columns:1fr}h1{font-size:26px}}