body{
    margin: 0;
    height: 100vh;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    width: 100vw;
    
}

a{
    text-decoration: none;
}

h1{
    margin: 0;
}

.center-h{
    display: flex;
    justify-content: center;
    align-items: center;
}

.center-c{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    padding: 2em;
    flex-wrap: wrap;
}

header img{
    height: auto;
    width: 20rem;
}

#tema{
    background-color: lightgray;
    border-style: none;
    border-radius: 10px;
    padding: 0.5em;
}

#tema img{
    width:2rem;
    margin-right: 5px;
}

#tema:hover{
    cursor: pointer;
}

#categorias{
    flex-wrap: wrap;
    gap:40px;
    margin-top: 50px;
    margin-bottom: 50px;
    align-items: stretch;
}

.card-categoria{
    background-image: url("../assets/conections.gif");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 15px;
    padding: 1em;
    color:aqua;
    min-width: 20%;
    width:25rem;
    min-height: 20rem;
    cursor: pointer;
    max-width: 75vw;
    cursor: pointer;
}

.card-categoria img{
    width: 5rem;
    height: auto;
    margin-bottom: 20px;
}

.card-categoria:hover{
    box-shadow: 0 0 0.1vw 0.4vw #e0f7fa,0 0 0.4vw 0.6vw #00e5ff,0 0 1vw 0.4vw #26c6da;
    transform: scale(1.05);
    transition: transform 0.5s ease-in-out;
}



footer{
    position:fixed;
    left: 0;
    bottom: 0;
    margin-top: 50px;
    padding: 0.5em;
    background-color:black;
    width: 100%;
    color:white;
}

footer p{
    margin-bottom: 0;
    margin-top: 0;
    text-align: center;
    width: 100%;
}

@media only screen and (max-width:600px) {
    header{
        justify-content: center;
    }
}