*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Verdana', Geneva, Tahoma, sans-serif;
}

.hero{
    width: 100%;
    height: 100vh;
    padding: 20px 10%;
}

nav{
    display: flex;
    align-items: center;
    width: 100%;
    justify-content: space-between;
}

nav .logo{
    width: 150px;
    cursor: pointer;
}

img .menu-img{
    width: 30px;
    cursor: pointer;
    display: none;
}
nav ul{
    flex: 1;
    text-align: right;
    margin-right: 150px;
}   
nav ul li{
    display: inline-block;
    list-style: none;
    margin: 10px 30px;
}
nav ul li a{
    text-decoration: none;
    color: #000000;
    font-size: 18px;
    padding: 10px;
    font-weight: 500;
    position: relative;
}   

nav ul li a::before{
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 0px;
    z-index: -1;
    background: #81c73f;
    bottom: -5px;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    transition: height 0.3s ease;
}

nav ul li a:hover::before{
    height: 85px ;
}

.row{
    display: flex;
    flex-wrap: wrap;
}

.col{
    flex-basis: 50%;
    position: relative;
}   

.feature-img{
    width: 100%;
    margin-top: 10px;
}

.thumbnail-img{
    width: 280px;
    position: absolute;
    bottom: 10px;
    left: 0;
    border-radius: 8px;
    box-shadow: 5px 8px 10px rgba(0, 128, 255, 0.1);
}

.col h1{
    font-size: 30px;
    font-weight: 600;
    margin-top: 180px;
}   

.col a{
    display: inline-block;
    margin-top: 20px;
    padding: 18px 50px;
    background: #81c73f;
    color: #000000;
    text-decoration: none;
    font-weight: 700;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    border-radius: 30px;
    box-shadow: 5px 8px 10px rgba(0, 128, 255, 0.1);

}

/* Botão voltar */
.back-btn {
position: fixed;
top: 20px;
left: 20px;
background: #38bdf8;
color: #0f172a;
padding: 10px 16px;
border-radius: 8px;
text-decoration: none;
font-weight: 600;
transition: all 0.3s ease;
box-shadow: 0 5px 15px rgba(56, 189, 248, 0.3);
}

/* Hover */
.back-btn:hover {
background: #0ea5e9;
transform: translateY(-2px);
box-shadow: 0 8px 20px rgba(56, 189, 248, 0.5);
}