body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:#f4f6f9;
}

.banner{
width:100%;
height:50vh;
overflow:hidden;
}

.banner img{
width:100%;
height:100%;
object-fit:cover;
display:block;
}

header{
background:#0b3c6d;
}

nav{
display:flex;
justify-content:center;
flex-wrap:wrap;
}

nav a{
color:white;
text-decoration:none;
padding:14px 18px;
font-weight:500;
}

nav a:hover{
background:#144f8b;
}

.container{
width:92%;
max-width:1100px;
margin:auto;
}

.section{
padding:60px 0;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
gap:20px;
}

.card{
background:white;
padding:20px;
border-radius:8px;
box-shadow:0 4px 10px rgba(0,0,0,0.1);
}

#countdown{
text-align:center;
font-size:22px;
color:#0b3c6d;
margin:30px 0;
font-weight:600;
}

footer{
background:#222;
color:#ccc;
padding:25px;
text-align:center;
margin-top:60px;
}