body{
    background:#eef2f7;
    font-family:Arial, Helvetica, sans-serif;
}

.hero{
    background:url('../img/estadio.jpg');
    background-size:cover;
    background-position:center;
    height:350px;
    position:relative;
}

.hero-overlay{
    background:rgba(0,0,0,.55);
    width:100%;
    height:100%;
    display:flex;
    align-items:center;
}

.hero h1{
    color:#fff;
    font-size:60px;
    font-weight:700;
}

.hero p{
    color:#fff;
    font-size:22px;
}

.mundial-card{
    border:none;
    border-radius:20px;
    overflow:hidden;
    box-shadow:0 10px 25px rgba(0,0,0,.08);
}

.mundial-card .card-header{
    background:#002b5b;
    color:#fff;
    font-size:24px;
    font-weight:700;
}

.match-card{
    background:#fff;
    border-radius:15px;
    padding:15px;
    margin-bottom:10px;
    border:1px solid #eee;
}

.team-logo{
    width:45px;
}

.score{
    font-size:26px;
    font-weight:bold;
    color:#0d6efd;
}

.adsense-box{
    height:90px;
    background:#fff;
    border-radius:15px;
    display:flex;
    align-items:center;
    justify-content:center;
    box-shadow:0 5px 15px rgba(0,0,0,.05);
}

footer{
    background:#04132b;
    color:#fff;
    padding:25px 0;
    margin-top:40px;
}

@media(max-width:768px){

.hero{
    height:250px;
}

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

.hero p{
    font-size:16px;
}

}
.flag{
    font-size:34px;
    margin-bottom:5px;
}

.match-card{
    transition:.3s;
    cursor:pointer;
}

.match-card:hover{
    transform:translateY(-3px);
    box-shadow:0 10px 25px rgba(0,0,0,.15);
}
.countdown{
    margin-top:25px;
    display:flex;
    justify-content:center;
    gap:15px;
    flex-wrap:wrap;
}

.countdown span{
    background:rgba(255,255,255,.15);
    padding:10px 20px;
    border-radius:30px;
    color:#fff;
    backdrop-filter:blur(5px);
}
.next-match{
    padding:12px;
    border-bottom:1px solid #eee;
}
.groups-nav{

display:flex;
flex-wrap:wrap;
gap:10px;
justify-content:center;
margin-bottom:25px;

}

.groups-nav a{

width:45px;
height:45px;

display:flex;
align-items:center;
justify-content:center;

background:#002b5b;
color:white;

border-radius:50%;
font-weight:bold;
text-decoration:none;

transition:.3s;

}

.groups-nav a:hover{

background:#0056b3;
transform:scale(1.1);

}