*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html{
    font-size: 10px;
    font-family: 'Roboto', sans-serif ;
}
#work{
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, #2980b9, #6dd5fa, #6154ac);
    padding: 5rem 2rem; 
}
.container{
    max-width: 96rem;
    margin: auto;
}    
#work h1{
    font-size: 5rem;
    font-weight: 700;
    color: #f7f7f7;
    text-align: center;
    letter-spacing: 1rem;
    text-transform: uppercase;
}
ul{
    margin: 2rem 0;
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
}
ul li{
    display: inline-block;
    margin: 0 1rem;
    font-size: 1.5rem;
    color: #fff;
    text-transform: uppercase;
    padding: 1rem 1.6rem;
    background-color: #0b5a8f;
    border-radius: 5px;
    cursor: pointer;
}
ul li.active{
    background-color: #6154ac;
}
.gallery{
    margin: 1re, 0;
    width: 100%;
}
.gallery .item{
    float: left;
    width: 33.3%;
    padding: 1.5rem;
    transition: transform 0.5 ease-in-out;
}

.item img{
    width: 100%;
    display: block;
}