header{
    font-family: sans-serif;
    text-align: center;
    padding-top: none;
    margin-top: none;
    
}

h1{
    text-align: center;
    font-family: fantasy;
    color: grey;
    font-size: 25px;
}

h2{
    font-family: fantasy;
    margin-left: 70px;
    color: grey;
}

#button {
    padding-top: none;
    margin-top: none;
    padding: 0;
    width: 100%;
    display: flex;
    text-align: center;
}

#introform{
    text-align: center;
    font-size: 25px;
}
form{
    font-family: sans-serif;
}

table{
    text-align: center;
}

tr td{
    padding-left: 80px;
    text-align: center;
    width: 33%;
}

#video{
    margin-left: 50px;
    padding-left: none;
    
}

p{
    margin-left: 20px;
    font-family: sans-serif;
}

input{
    margin-left: 20px;
}


#puntos{
    width: 600px;
    display:block;
    margin:auto;
    border: 20px grey solid;
}

#puntos:hover{
   border: 20px black solid;
    transform: scale(1.05);
}

#x1{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}

#x2{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}

#x3{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}

#d{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}
#m{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}
#y{
    margin-left: 20px;
    border: 1px grey solid;
    border-radius: 10px;
    padding: 5px;
    width: 100px;
    outline: none;
}

#div{
    background-color: grey;
    width: 200px;
    height: 50px;
    border-radius: 20px;
    font-family: sans-serif;
}
#div:hover{
    background-color: black;
    color: white;
    transform: scale(1.05);
}

#Ej_Ecuaciones{
    background-color: grey;
    width: 200px;
    height: 50px;
    border-radius: 20px;
    font-family: sans-serif;
}

#Ej_Ecuaciones:hover{
    background-color: black;
    color: white;
    transform: scale(1.05);
}

#Ej_Meses{
    background-color: grey;
    width: 200px;
    height: 50px;
    border-radius: 20px;
    font-family: sans-serif;
}
#Ej_Meses:hover{
    background-color: black;
    color: white;
    transform: scale(1.05);
}