* {
  box-sizing: border-box;
}

body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:#f5f7fb;
color:#333;
}

header{
position:fixed;
top:0;
width:100%;
background:#0f172a;
display:flex;
justify-content:space-between;
align-items:center;
padding:5px 60px;
}

header a{
color:white;
text-decoration:none;
margin-left:20px;
}

.hero{
text-align:center;
padding:80px 20px 0 0;
}

.hero img{
width:80%;
max-width:900px;
}

.container{
width:90%;
margin:auto;
padding:0 0;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:30px;
}

.card{
background:white;
padding:15px;
border-radius:10px;
box-shadow:0 5px 15px rgba(0,0,0,0.1);
}

footer{
background:#0f172a;
color:white;
text-align:center;
padding:5px;
margin-top:20px;
}

button{
background:#2563eb;
border:none;
color:white;
padding:10px 20px;
border-radius:5px;
cursor:pointer;
}

input,textarea{
padding:10px;
margin:10px 0;
}

.logo-container{
display:flex;
align-items:center;
gap:10px;
}

.logo{
height:42px;
transition:all 0.3s ease;
}

.site-name{
font-size:22px;
font-weight:600;
background:linear-gradient(90deg,#60a5fa,#a855f7);
-webkit-background-clip:text;
color:transparent;
transition:all 0.3s ease;
}

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