*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#eef3ff;color:#222;display:flex}
.sidebar{width:240px;background:#0f172a;color:#fff;min-height:100vh;padding:20px;position:sticky;top:0}
.sidebar a{display:block;color:#fff;text-decoration:none;padding:10px 0}
.content{flex:1;padding:20px}
header{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap}
input{padding:12px;border-radius:30px;border:1px solid #ccc;flex:1;max-width:400px}
button{padding:12px 16px;border:none;border-radius:30px;cursor:pointer}
.hero{padding:20px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.card{background:#fff;border-radius:18px;padding:20px;box-shadow:0 8px 20px rgba(0,0,0,.1);cursor:pointer;transition:.3s}
.card:hover{transform:translateY(-6px)}
.dark{background:#111827;color:#fff}.dark .card{background:#1f2937;color:#fff}.dark .sidebar{background:#020617}
@media(max-width:768px){body{display:block}.sidebar{width:100%;min-height:auto;position:relative}.grid{grid-template-columns:1fr}}