html {
    width: 100%;
    min-height: 100%;
}
body {
    background-image: url("../img/bg.jpg");
    background-position: center center;
    background-size: cover;
    background-attachment: fixed;
    position: relative;
    width: 100%;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
section.main {
    width: 90%;
    max-width: 1200px;
    background-color: rgba(255, 255, 255, 0.5);
    padding: 50px;
    margin: 50px auto;
    border-radius: 10px;
}
.logotipo {
    width: 250px;
    height: auto;
}
.btn-pulse {
    animation: pulse infinite 1s;
}
.whats {
    position:fixed;
    right:20px;
    bottom:20px;
    z-index:10000;
    animation: shakeX 2s infinite;
}
.whats a {
    background-color:#00bf49;
    color:#fff;
    padding:10px 15px;
    border-radius: 40px;
    display: block;
    text-decoration: none;
}
.whats a:hover {
    background-color:#13d45d;
}
h1 {
    font-size: 3rem;
    color: #152877;
    margin-bottom: 20px;
    text-transform: uppercase;
    font-weight:bold;
}
h2 {
    font-weight: bold;
    font-size: 2rem;
    color: #333;
    margin-bottom: 15px;
}
h3 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 25px;
}
@media (max-width: 768px) {
    section.main {
        padding: 20px;
        width: 95%;
        margin: 20px auto;
    }
    .logotipo {
        width: 200px;
        height: auto;
    }
        
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-weight: bold;
    }
    h3 {
        font-size: 1.2rem;
    }
}
@media (max-width: 576px) {
    section.main {
        padding: 15px;
    }
    .logotipo {
        width: 150px;
        height: auto;
    }
}