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

body{
    font-family:'Inter',sans-serif;
    background:
    radial-gradient(circle at top left,#0f172a,#020617);
    color:white;
    min-height:100vh;
}

.contenedor-sedes{
    max-width:1400px;
    margin:auto;
    padding:2rem 1.25rem;
}

.seccion-sede{
    margin-bottom:4rem;
}

.titulo-pais{
    display:flex;
    align-items:center;
    gap:.75rem;
    margin-bottom:1.5rem;
}

.titulo-pais img{
    width:40px;
    height:40px;
    object-fit:contain;
}

.titulo-pais h2{
    font-size:1.9rem;
    font-weight:800;
}

.grid-estadios{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
    gap:1.5rem;
}

.tarjeta-sede{
    position:relative;
    display:block;
    height:260px;
    overflow:hidden;
    border-radius:24px;

    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.08);

    backdrop-filter:blur(12px);

    transition:
    transform .35s ease,
    box-shadow .35s ease;
}

.tarjeta-sede:hover{
    transform:translateY(-8px);
    box-shadow:
    0 20px 40px rgba(0,0,0,.35);
}

.imagen-estadio{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .6s ease;
}

.tarjeta-sede:hover .imagen-estadio{
    transform:scale(1.08);
}

.overlay{
    position:absolute;
    inset:0;

    background:
    linear-gradient(
        to top,
        rgba(0,0,0,.85),
        rgba(0,0,0,.35),
        transparent
    );
}

.grupo-mexico .overlay{
    background:
    linear-gradient(
        to top,
        rgba(0,99,65,.92),
        rgba(0,0,0,.25),
        transparent
    );
}

.grupo-canada .overlay{
    background:
    linear-gradient(
        to top,
        rgba(220,38,38,.92),
        rgba(0,0,0,.25),
        transparent
    );
}

.grupo-inglaterra .overlay{
    background:
    linear-gradient(
        to top,
        rgba(180,0,0,.92),
        rgba(0,0,0,.25),
        transparent
    );
}

.info-estadio{
    position:absolute;
    left:20px;
    bottom:20px;
    z-index:2;
}

.info-estadio h3{
    font-size:1.25rem;
    font-weight:700;
    margin-bottom:.25rem;
}

.info-estadio span{
    font-size:.9rem;
    opacity:.85;
}

.tarjeta-sede::after{
    content:"→";
    position:absolute;
    top:18px;
    right:18px;

    width:40px;
    height:40px;

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

    border-radius:50%;

    background:rgba(255,255,255,.15);
    backdrop-filter:blur(10px);

    color:white;
    font-size:1rem;
    font-weight:700;

    opacity:0;
    transform:translateY(-10px);

    transition:.3s ease;
}

.tarjeta-sede:hover::after{
    opacity:1;
    transform:translateY(0);
}

@media (max-width:768px){

    .titulo-pais h2{
        font-size:1.5rem;
    }

    .grid-estadios{
        grid-template-columns:1fr;
    }

    .tarjeta-sede{
        height:230px;
    }
}