body {
    font-family: "Fjalla One", sans-serif;
    background: #163784;
    padding: 0;
    margin: 0;
    color: #fff;
    font-size: 1.4rem;
}

main {
    box-sizing: border-box;
    min-height: 100vh;
    display: flex;
    flex-flow: column nowrap;
    justify-content: start;
    align-items: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

video {
    width: 100%;
}

h1 {
    color: #fff;
    font-size: 2.5rem;
    text-align: center;
}

h2 {
    color: #fff;
    font-size: 2.5rem;
    text-align: center;
    margin: 2rem 0 1rem;
}

h3 {
    color: #fff;
    font-size: 2rem;
    font-weight: 300;
    text-align: left;
    font-family: "oswald", sans-serif;
    margin: 1rem 0 0.5rem;
}

p {
    font-family: "oswald", sans-serif;
    font-weight: 250;
    line-height: 1.5;
}

.chapters{
    width: 100%;
}
.chapters h2 {
    text-align: left;
}

article {
    width: 100%;
    margin-bottom: 4rem;
}
.container_buttons{
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}
.container_buttons a{
    color: #fff;
    border: 1px solid #fff;
    padding: 0.5rem;
    text-decoration: none;
    width: 200px;
    text-align: center;
}
.container_buttons a:hover{
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
    background: rgba(255,255,255,0.2);
}