*{
    margin: 0;
    padding: 0;
}
body{
    font-family: 'Big Shoulders Display';
    letter-spacing: 2px;
    font-weight: bold;
}
header{
    background: rgb(0, 0, 0);
}
header img{
    width: 150px;
    margin: 5px 0 0 10px;
}
header article{
    text-align: center;
}
.header-flex{
    background: url(../images/aidan-bartos-v9rZ3Yz6fSg-unsplash.jpg);
    background-position: top;
    background-size: cover;
}
.header-back{
    background: rgba(0, 0, 0, 0.678);
}
.header-text{
    color: yellow;
}
.header-text h1{
    padding-top: 20px;
    font-size: 2.9em;
    text-transform: uppercase;
}
.header-text p{
    padding: 20px 0;
    font-size: 1.3em;
    color: white;
}
.buy{
    border: none;
    border-radius: 5px;
    width: 60%;
    padding: 15px 0;
    text-transform: uppercase;
    letter-spacing: 4px;
    background: rgb(18, 250, 18);
    font-weight: bold;
    position: relative;
    overflow: hidden;
    -webkit-box-reflect: below 2px linear-gradient(transparent 20%, rgb(18, 250, 18));
    box-shadow: 0 0 10px rgb(18, 250, 18), 0 0 40px rgb(18, 250, 18), 0 0 80px rgb(18, 250, 18);
    cursor: pointer;
    transition: .3s ease;
}
a:hover .buy{
    background: yellow;
    box-shadow: 0 0 10px yellow, 0 0 40px yellow, 0 0 80px yellow;
}
.buy span:nth-child(1){
    position: absolute;
    display: block;
    width: 100%;
    height: 3px;
    top: 0;
    left: -100%;
    background: black;
    /* background: linear-gradient(90deg, transparent, black); */
    animation: linebutton1 1s linear infinite;
}
.buy span:nth-child(2){
    position: absolute;
    display: block;
    width: 3px;
    height: 100%;
    top: -100%;
    right: 0;
    /* background: linear-gradient(170deg, transparent, black); */
    background: black;
    animation: linebutton2 1s linear infinite;
    animation-delay: .25s;
}
.buy span:nth-child(3){
    position: absolute;
    display: block;
    width: 100%;
    height: 3px;
    bottom: 0;
    right: -100%;
    /* background: linear-gradient(180deg, transparent, black); */
    background: black;
    animation: linebutton3 1s linear infinite;
    animation-delay: .5s;
}
.buy span:nth-child(4){
    position: absolute;
    display: block;
    width: 3px;
    height: 100%;
    bottom: -100%;
    left: 0;
    /* background: linear-gradient(270deg, transparent, black); */
    background: black;
    animation: linebutton4 1s linear infinite;
    animation-delay: .75s;
}
@keyframes linebutton1{
    0%{
        left: -100%;
    }
    50%, 100%{
        left: 100%;
    }
}
@keyframes linebutton2{
    0%{
        top: -100%;
    }
    50%, 100%{
        top: 100%;
    }
}
@keyframes linebutton3{
    0%{
        right: -100%;
    }
    50%, 100%{
        right: 100%;
    }
}
@keyframes linebutton4{
    0%{
        bottom: -100%;
    }
    50%, 100%{
        bottom: 100%;
    }
}
.header-img{
    margin-top: 40px;
}
.buy{
    animation: buy;
    animation-duration: .5s;
    animation-timing-function: ease;
    animation-play-state: running;
    animation-iteration-count: infinite;
}
@keyframes opacidade{
    0%{
        opacity: 1;
    }
    50%{
        opacity: 0;
    }
    100%{
        opacity: 1;
    }
}
@keyframes buy{
    0%{
        transform: scale(1);
    }
    50%{
        transform: scale(1.05);
    }
    100%{
        transform: scale(1);
    }
}
.main-section{
    text-align: center;
    padding: 30px 20px 40px;
    background: rgb(14, 14, 14);
    line-height: 1.5;
}
.article-text{
    text-transform: uppercase;
    font-size: 1.7em;
}
.article-text h2{
    color: yellow;
}
.article-text h3{
    color: white;
}
.article-img img{
    width: 100%;
    border-radius: 5px;
    transition: .3s;
}
.article-img:hover img:first-child{
    box-shadow: 0px 0px 10px white;
}
.article-second-text h2{
    color: rgb(18, 250, 18);
}
.article-second-text h3{
    color: white;
}
.article-second-text h3:first-child{
    color: yellow;
}
.article-img-second{
    margin-top: 20px;
    position: relative;
    margin-bottom: 20px;
}
.article-img-second img:last-child{
    position: absolute;
    top: 5%;
    left: 0;
}
.second-section{
    text-align: center;
    padding: 0px 20px;
    background: rgb(14, 14, 14);
    color: white;
}
.second-section article{
    margin-bottom: 30px;
    background: transparent;
    border-radius: 5px;
    padding: 15px;
    border: 1px solid white;
    transition: .3s;
}
.second-section article:hover{
    box-shadow: 0 0 8px white;
}
.second-section article  i{
    font-size: 3.5em;
    color: yellow;
}
.second-section article h2{
    padding: 30px 0;
    color: yellow;
    text-transform: uppercase;
}
.second-section article p{
    padding-bottom: 20px;
}
.conteudo{
    padding: 70px 50px;
    line-height: 2.5;
    background: rgb(14, 14, 14);
    text-align: center;
}
.main-conteudo{
    /* padding-left: 40px; */
    margin-bottom: 30px;
    text-align: left;
    width: 45%;
    width: 400px; 
}

.conteudo .main-conteudo p::before{
    content: "\f00c";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    vertical-align: middle;
    padding-right: 5px; 
    color: rgb(18, 250, 18);
}
.conteudo .main-conteudo p{
    color: white;
    font-size: 20px;
}
footer{
    padding: 50px 40px 10px;
    line-height: 1.5;
    font-size: 18px;
    color: white;
    text-align: center;
    background: rgb(15, 15, 15);
}
footer .footer-rigth p{
    padding-top: 30px;
}
footer ul{
    padding-top: 20px;
    text-align: center;
    list-style-type: none;
}
footer ul li{
    display: inline-block;
}
footer ul li:nth-child(2){
    padding: 0 15px;
}
footer ul li a{
    color: white;
    font-size: 1.5em;
}
footer ul li a:hover{
    color: yellow;
}
@media screen and (min-width: 760px){
    .header-back{
        display: flex;
    }
    .header-text{
        width: 50%;
        text-align: left;
        padding: 0 0px 0px 100px;
    }
    .header-text h1{
        font-size: 4em;
    }
    .header-text p{
        font-size: 1.8em;
    }
    .header-img{
        width: 50%;
    }
    .header-img img{
        height: 300px;
        width: 150px;
        margin-bottom: 40px;
    }
    .article-text h3{
        font-size: 2em;
    }
    .article-text h2{
        font-size: 3em;
    }
    .article-grid{
        padding-top: 50px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: auto;
    }
    .main-conteudo:nth-child(1){
        padding-left: 40px;
    }
    .main-section button{
        margin-top: 50px;
    }
    .article-img{
        margin: 0;
    }
    .article-second-text h3{
        font-size: 1em;
    }
    .article-second-text h2{
        font-size: 1.5em;
    }
    .second-section-grid{
        padding-top: 50px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        text-align: center;
    }
    .second-section-grid article{
        width: 85%;
    }
    .second-section button{
        margin-top: 40px;
    }
    .conteudo-grid{
        /* display: grid; */
        /* grid-template-columns: repeat(2, 1fr); */
        display: flex;
        justify-content: center;
    }
    .footer-grid{
        display: flex;
        justify-content: center;
        /* grid-template-columns: repeat(2, 1fr); */
    }
    .footer-grid div{
        width: 500px;
        margin-right: 15px;
        margin-left: 15px;
    }
    .footer-grid .footer-rigth p{
        padding: 0;
    }
}
@media screen and (min-width: 840px){
    .article-second-text h3{
        font-size: 1.5em;
    }
    .article-second-text h2{
        font-size: 2em;
    }
    .header-text h1{
        font-size: 5em;
    }
    .header-text p{
        font-size: 1.5em;
    }
    .header-img img{
        height: 100%;
        width: 300px;
        margin-bottom: 40px;
    }
}
@media screen and (min-width: 1000px){
    .article-second-text h3{
        font-size: 2em;
    }
    .article-second-text h2{
        font-size: 2.5em;
    }
    .header-text h1{
        font-size: 5.5em;
    }
    .header-text p{
        font-size: 1.8em;
    }
    .header-img img{
        height: 100%;
        width: 300px;
        margin-bottom: 40px;
    }
}
@media screen and (min-width: 1200px){
    .article-second-text h3{
        font-size: 2.4em;
    }
    .article-second-text h2{
        font-size: 3em;
    }
    .header-text h1{
        font-size: 6em;
    }
    .header-text p{
        font-size: 2.2em;
    }
    .header-img img{
        height: 100%;
        width: 300px;
        margin-bottom: 40px;
    }
}

@media screen and (max-width: 470px) {
    .conteudo .main-conteudo p{
        font-size: 10px;
    }
    .conteudo-grid{
        /* display: flex;
        grid-template-columns: repeat(2, 1fr); */
        flex-wrap: wrap;
    }
    .main-conteudo {
        width: 100%;
    }
}