@import url("https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: url("https://i.postimg.cc/XYjWrv36/dark-hexagonal-background-with-gradient-color_79603-1409.jpg") no-repeat;
    background-size: cover;
    background-position: center;
}

.box {
    position: relative;
    width: 370px;
    height: 450px;
    background: #1c1c1c;
    border-radius: 50px 5px;
    overflow: hidden;
}

    .box::before {
        content: "";
        position: absolute;
        top: -50%;
        left: -50%;
        width: 370px;
        height: 450px;
        background: linear-gradient(60deg, transparent, #45f3ff, #45f3ff);
        transform-origin: bottom right;
        animation: animate 6s linear infinite;
    }

    .box::after {
        content: "";
        position: absolute;
        top: -50%;
        left: -50%;
        width: 370px;
        height: 450px;
        background: linear-gradient(60deg, transparent, #d9138a, #d9138a);
        transform-origin: bottom right;
        animation: animate 6s linear infinite;
        animation-delay: -3s;
    }

@keyframes animate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

form {
    position: absolute;
    inset: 2px;
    border-radius: 50px 5px;
    background: #28292d;
    z-index: 10;
    padding: 30px 30px;
    display: flex;
    flex-direction: column;
}

h2 {
    color: #45f3ff;
    font-size: 35px;
    font-weight: 500;
    text-align: center;
}

.input-box {
    position: relative;
    width: 300px;
    margin-top: 35px;
}

    .input-box input {
        position: relative;
        width: 100%;
        padding: 20px 10px 10px;
        background: transparent;
        border: none;
        outline: none;
        color: #23242a;
        font-size: 1em;
        letter-spacing: 0.05em;
        z-index: 10;
    }

input[type="submit"] {
    font-size: 20px;
    border: none;
    outline: none;
    background: #45f3ff;
    padding: 5px;
    margin-top: 40px;
    border-radius: 90px;
    font-weight: 600;
    cursor: pointer;
}

    input[type="submit"]:active {
        background: linear-gradient(90deg, #45f3ff, #d9138a);
        opacity: 0.8;
    }

.input-box span {
    position: absolute;
    left: 0;
    padding: 20px 10px 10px;
    font-size: 1em;
    color: #8f8f8f;
    pointer-events: none;
    letter-spacing: 0.05em;
    transition: 0.5s;
}

.input-box input:valid ~ span,
.input-box input:focus ~ span {
    color: #45f3ff;
    transform: translateX(-10px) translateY(-30px);
    font-size: 0.75em;
}

.input-box i {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: rgb(69, 243, 255);
    border-radius: 4px;
    transition: 0.5s;
    pointer-events: none;
    z-index: 9;
}

.input-box input:valid ~ i,
.input-box input:focus ~ i {
    height: 44px;
    background: rgba(69, 243, 255, 0.5);
}

.links {
    display: flex;
    justify-content: space-between;
}

    .links a {
        margin: 25px 0;
        font-size: 1em;
        color: #8f8f8f;
        text-decoration: none;
    }

        .links a:hover,
        .links a:nth-child(2) {
            color: #45f3ff;
        }

            .links a:nth-child(2):hover {
                color: #d9138a;
            }