:root{

    --primary:#B30000;
    --secondary:#0A2342;

    --background:#FFFFFF;
    --surface:#F5F5F5;

    --text:#000000;
    --border:#DDDDDD;

    --max-width:1000px;

}

*{

    margin:0;
    padding:0;
    box-sizing:border-box;

}

body{

    font-family:Arial, Helvetica, sans-serif;

    background:var(--background);

    color:var(--text);

    line-height:1.6;

}

header{

    max-width:var(--max-width);

    margin:auto;

    display:flex;

    justify-content:space-between;

    align-items:center;

    padding:25px;

}

header img{

    height:80px;

}

nav button{

    margin-left:10px;

    padding:8px 16px;

    cursor:pointer;

    border:1px solid var(--primary);

    background:white;

    color:var(--primary);

}

nav button:hover{

    background:var(--primary);

    color:white;

}

main{

    max-width:var(--max-width);

    margin:auto;

    padding:20px;

}

section{

    margin:70px 0;

}

.hero{

    text-align:center;

}

.hero h1{

    font-size:3rem;

}

.hero h2{

    color:var(--primary);

    margin:15px 0;

    font-weight:normal;

}

.skills{

    display:flex;

    flex-wrap:wrap;

    gap:10px;

    margin-top:20px;

}

.skills span{

    background:var(--secondary);

    color:white;

    padding:8px 16px;

    border-radius:20px;

}

.projects{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));

    gap:20px;

    margin-top:20px;

}

.card{

    border:1px solid var(--border);

    padding:20px;

    border-radius:8px;

}

.card:hover{

    border-color:var(--primary);

}

footer{

    margin-top:80px;

    text-align:center;

    padding:30px;

    border-top:1px solid var(--border);

}

@media(max-width:700px){

header{

    flex-direction:column;

    gap:20px;

}

.hero h1{

    font-size:2rem;

}

}

.dark-mode{

    --background:#111111;

    --surface:#1E1E1E;

    --text:#FFFFFF;

    --border:#333333;
    
    --primary:#1e5497;
    
    --secondary:#B30000;

}