* {
    box-sizing: border-box;
}
html,
body {
    height: 100%;
    min-height: 100vh;
    padding: 0;
    margin: 0;
}
body {
    background-color: #BBF1FF;
    font-family: 'Montserrat', 'Arial', sans-serif;
    font-size: 16rem;
}
a{
    text-decoration: none;
    color: #000;
}
a:hover,
a:focus{
    text-decoration: none;
    color: #0000C6;
    opacity: 0.8;
}
.span {
    font-weight: bold;
    color: #0000C6;
    font-size: 2rem;
}
.container {
    display: flex;
    flex-direction: column;
    height: 100%;
}
header {
    width: 100%;
}
main {
    flex: 1;
}
h2 {
    text-transform: uppercase;
    font-weight: 400;
    padding: 1rem 0;
    font-size: 30px;
    color: #0000C6;
}
h2 span {
    font-weight: 600;
}
h3 {
    font-weight: 600;
    padding: 1rem 0;
    font-size: 23px;
    color: #0000C6;
}
h4 {
    text-transform: uppercase;
    font-weight: 500;
    padding: 1rem 0;
    font-size: 23px;
    color: #000;
}
.box-contatos ul li{
    font-weight: 500;
    color: #0000C6;
    font-size: 18px;
}
/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px){
    h2 {
        font-size: 20px;
    }
    h3 {
        font-size: 18px;
    }
    h4 {
        font-size: 18px;
    }
    .box-contatos ul li{
        font-size: 12px;
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px){
    h2 {
        font-size: 23px;
    }
    h3 {
        font-size: 20px;
    }
    h4 {
        font-size: 20px;
    }
    .box-contatos ul li{
        font-size: 13px;
    }
    
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991.98px){
    h2 {
        font-size: 25px;
    }
    h3 {
        font-size: 22px;
    }
    h4 {
        font-size: 22px;
    }
    .box-contatos ul li{
        font-size: 12px;
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) and (max-width: 1199.98px){
    .box-contatos ul li{
        font-size: 16px;
    }
}

/* Extra large devices (large desktops, 1200px and up) */
/*
@media (min-width: 1200px){
    
}
*/