*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial,sans-serif;
}

body{
background:#f5f5f5;
}

header{
display:flex;
justify-content:space-between;
align-items:center;
padding:15px 40px;
background:#002147;
color:white;
position:sticky;
top:0;
z-index:1000;
}

.logo{
font-size:24px;
font-weight:bold;
}

nav ul{
display:flex;
list-style:none;
}

nav ul li{
margin-left:20px;
}

nav ul li a{
color:white;
text-decoration:none;
}

#darkBtn{
padding:8px;
cursor:pointer;
}

.ticker{
background:#ffcc00;
padding:10px;
}

.hero{
height:400px;
background:linear-gradient(135deg,#002147,#0057b7);
color:white;
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
}

.hero h1{
font-size:50px;
}

.search-section{
padding:30px;
text-align:center;
}

.search-section input{
width:70%;
padding:12px;
border:1px solid #ccc;
border-radius:30px;
}

section{
padding:50px;
}

section h2{
text-align:center;
margin-bottom:30px;
}

.cards{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:20px;
}

.card{
background:white;
padding:20px;
border-radius:10px;
box-shadow:0 4px 10px rgba(0,0,0,.1);
transition:.3s;
}

.card:hover{
transform:translateY(-10px);
}

.card a{
display:inline-block;
margin-top:10px;
padding:8px 15px;
background:#002147;
color:white;
text-decoration:none;
border-radius:5px;
}

footer{
background:#002147;
color:white;
text-align:center;
padding:20px;
}

#topBtn{
position:fixed;
bottom:20px;
right:20px;
padding:10px;
display:none;
cursor:pointer;
}

.dark{
background:#121212;
color:white;
}

.dark .card{
background:#1f1f1f;
color:white;
}