:root{
--bg:#ffffff;
--text:#111;
--primary:#4a6cff;
}

body.dark{
--bg:#111;
--text:#eee;
--primary:#7c9cff;
}

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

header{
display:flex;
justify-content:space-between;
align-items:center;
padding:15px 30px;
border-bottom:1px solid #ccc;
}

nav a{
margin:0 10px;
text-decoration:none;
color:var(--text);
}

#themeToggle{
font-size:18px;
cursor:pointer;
background:none;
border:none;
}

.hero{
text-align:center;
padding:120px 20px;
}

.btn{
background:var(--primary);
color:white;
padding:10px 20px;
border-radius:6px;
text-decoration:none;
}

.content{
padding:50px;
max-width:900px;
margin:auto;
}

.projects{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
gap:20px;
}

.card{
padding:20px;
border:1px solid #ccc;
border-radius:10px;
}

form{
display:flex;
flex-direction:column;
gap:10px;
}

input, textarea{
padding:10px;
border-radius:6px;
border:1px solid #ccc;
}

button{
padding:10px;
border:none;
background:var(--primary);
color:white;
border-radius:6px;
cursor:pointer;
}