style.css

/*reset*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Century Gothic;
    transition: all .5s;
}

::selection{
    background-color: #00ff8550;
    padding: 10px;
}

img{
    width: 200px;
}

h1{
    font-size: 30pt;
}

section {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(-90deg, #222222, #0c9452, #222222);
    background-size: 400% 400%;
    animation: Gradient 10s ease infinite;
}

.flex {
    display: flex;
    width: 700px;
    align-items: center;
    justify-content: space-between;
}

.flexd {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    gap: 10px;
}

.flexc {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    height: 25%;
}

.login{
    display: flex;
    flex-direction: column;
    width: 800px;
    height: 800px;
    padding: 50px;
    background-color: #222222;
    color: #00ff85;
    border-radius: 5%;
    justify-content: space-around;
}

.login a{
    text-decoration: none;
    color: #f0f0f0;
}

.item {
    width: 700px;
    border-radius: 100px;
    padding: 8px;
    border: none;
}

.btn{
    border-radius: 100px;
    padding: 10px;
    border: none;
    text-transform: uppercase;
    background-color: #00ff85;
    font-weight: 900;
    cursor: pointer;
}

.checkbox {
    margin-bottom: 5px;
    margin-left: 5px;
    width: 10px;
    height: 10px;
}

@keyframes Gradient {
    0% {
        background-position: 0% 50%
    }
    50% {
        background-position: 100% 50%
    }
    100% {
        background-position: 0% 50%
    }
}