:root{
--bg:#000;
--text:#fff;
--accent:#fff;
}

body.light{
--bg:#f5f5f5;
--text:#111;
--accent:#000;
}

body{
margin:0;
font-family:'Space Grotesk',sans-serif;
background:var(--bg);
color:var(--text);
transition:0.3s;
}

.header{
display:flex;
justify-content:space-between;
align-items:center;
padding:25px 60px;
position:fixed;
width:100%;
top:0;
background:transparent;
}

.logo img{
height:45px;
}

nav a{
margin-left:30px;
text-decoration:none;
color:var(--text);
font-size:14px;
opacity:.8;
}

.hero{
height:100vh;
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
text-align:center;
}

.hero h1{
font-size:70px;
margin:0;
}

.hero p{
opacity:.7;
margin:20px 0 40px 0;
}

.cta{
padding:14px 40px;
border-radius:30px;
background:white;
color:black;
text-decoration:none;
font-weight:500;
}

.cta.big{
font-size:18px;
padding:18px 50px;
}

.section{
padding:140px 20%;
text-align:center;
}

.section.dark{
background:#0a0a0a;
}

.grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:40px;
margin-top:60px;
}

.card{
padding:40px;
border:1px solid rgba(255,255,255,0.1);
border-radius:20px;
}

.footer{
text-align:center;
padding:40px;
opacity:.5;
}

.toggle{
cursor:pointer;
font-size:18px;
}