body{margin:0;font-family:Arial,sans-serif;background:#f5f7fb;color:#1f2937}.topbar{display:flex;justify-content:space-between;padding:16px 24px;background:#111827;color:#fff}.topbar a{color:#fff;text-decoration:none}.hero{padding:48px;max-width:960px;margin:auto}.btn{display:inline-block;padding:12px 18px;background:#2563eb;color:#fff;text-decoration:none;border-radius:8px}.layout{display:flex;min-height:100vh}.sidebar{width:240px;background:#111827;color:#fff;padding:20px}.sidebar a{display:block;color:#fff;text-decoration:none;padding:10px 0}.content{flex:1;padding:24px}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}.metric,.card{background:#fff;border-radius:14px;padding:18px;box-shadow:0 4px 16px rgba(0,0,0,.06)}.metric span{display:block;color:#6b7280}.metric strong{font-size:28px}table{width:100%;border-collapse:collapse}th,td{border-bottom:1px solid #e5e7eb;padding:10px;text-align:left;font-size:14px}input,button{display:block;width:100%;padding:12px;margin:10px 0;border:1px solid #d1d5db;border-radius:8px}button{background:#2563eb;color:white;border:none;cursor:pointer}.card{max-width:1100px;margin:24px auto}