body{
margin:0;
font-family:Segoe UI, Arial;
background:#f4f6f9;
color:#1f2937;
}

/* NAVBAR */
nav{
position:sticky;
top:0;
background:#0f172a;
padding:12px;
text-align:center;
z-index:1000;
}

nav a{
color:white;
margin:0 15px;
text-decoration:none;
font-weight:600;
}

nav a:hover{
color:#38bdf8;
}

/* HEADER */
header{
background:linear-gradient(135deg,#1e3c72,#2a5298);
color:white;
text-align:center;
padding:50px 20px;
}

header h1{
margin:0;
font-size:40px;
}

header p{
opacity:0.9;
}

/* CONTAINER */
.container{
max-width:1100px;
margin:auto;
padding:30px;
}

/* CARD */
.card{
background:white;
padding:20px;
margin:15px 0;
border-radius:12px;
box-shadow:0 5px 15px rgba(0,0,0,0.08);
transition:0.3s;
}

.card:hover{
transform:translateY(-5px);
}

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

/* FOOTER */
footer{
text-align:center;
padding:20px;
background:#0f172a;
color:white;
margin-top:40px;
}