body{
font-family: Arial, Helvetica, sans-serif;
margin:0;
background:#fafafa;
color:#333;
}

header{
display:flex;
justify-content:space-between;
align-items:center;
padding:20px 40px;
background:white;
box-shadow:0 2px 6px rgba(0,0,0,0.08);
}

.logo{
font-size:22px;
font-weight:bold;
}

nav a{
margin-left:20px;
cursor:pointer;
color:#333;
text-decoration:none;
font-weight:500;
}

.page{
display:none;
padding:60px 20px;
max-width:900px;
margin:auto;
}

.active{
display:block;
}

h1{
font-size:40px;
margin-bottom:20px;
}

.cards{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
margin-top:40px;
}

.card{
background:white;
padding:20px;
border-radius:12px;
box-shadow:0 4px 10px rgba(0,0,0,0.06);
}

form{
display:flex;
flex-direction:column;
gap:10px;
max-width:400px;
}

input,textarea{
padding:12px;
border-radius:6px;
border:1px solid #ccc;
}

button{
padding:12px;
border:none;
background:#333;
color:white;
border-radius:6px;
cursor:pointer;
}

footer{
text-align:center;
padding:30px;
margin-top:60px;
background:white;
border-top:1px solid #eee;
}