*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#eee}.layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh;max-width:1200px;margin:auto}aside{background:#2f4358;color:white;padding:24px}aside a{display:block;padding:10px 0}main{padding:30px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cards article{background:white;padding:22px;border-radius:8px;box-shadow:0 3px 10px #0002}.cards span{display:block;margin-top:12px}table{width:100%;border-collapse:collapse;background:#f5f5f5}th,td{text-align:left;padding:14px;border-bottom:1px solid #ddd}@media(max-width:700px){.layout{grid-template-columns:1fr}aside{display:flex;gap:14px;flex-wrap:wrap}.cards{grid-template-columns:1fr}}