*{
margin:0;
padding:0;
box-sizing:border-box;
}

body{
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto;
background:#fafafa;
color:#111;
line-height:1.6;
}


/* header */

.header{
display:flex;
justify-content:space-between;
align-items:center;
padding:20px 60px;
background:#fff;
border-bottom:1px solid #eee;
}

.logo a{
font-size:22px;
font-weight:600;
text-decoration:none;
color:#111;
}

.nav a{
margin-left:25px;
text-decoration:none;
color:#555;
font-size:15px;
}

.nav a:hover{
color:#000;
}


/* hero */

.hero{
text-align:center;
padding:100px 20px;
}

.hero h1{
font-size:52px;
font-weight:700;
margin-bottom:10px;
}

.hero p{
color:#666;
font-size:18px;
}


/* articles */

.articles{
max-width:900px;
margin:auto;
padding:40px 20px;
}

.articles h2{
margin-bottom:30px;
font-size:26px;
}

.article-list{
display:grid;
grid-template-columns:1fr 1fr;
gap:25px;
}

.card{
background:white;
padding:25px;
border-radius:12px;
text-decoration:none;
color:#111;
box-shadow:0 5px 15px rgba(0,0,0,0.05);
transition:all 0.2s;
}

.card:hover{
transform:translateY(-3px);
box-shadow:0 8px 25px rgba(0,0,0,0.08);
}

.card h3{
margin-bottom:10px;
font-size:18px;
}

.card p{
color:#666;
font-size:14px;
margin-bottom:10px;
}

.card span{
font-size:13px;
color:#999;
}


/* footer */

.footer{
text-align:center;
padding:40px;
color:#888;
font-size:14px;
}



/* mobile */

@media (max-width:768px){

.header{
padding:20px;
}

.article-list{
grid-template-columns:1fr;
}

.hero h1{
font-size:36px;
}

}