/* Font import and global reset */
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300;400;500;600;700&display=swap');

/* Global reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Quicksand', sans-serif;
}

/* Body styling */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;
}

/* Section styles */
section {
    position: absolute;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2px;
    flex-wrap: wrap;
    overflow: hidden;
}

    /* Animated gradient effect */
    section::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: linear-gradient(#000, #0f0, #000);
        animation: animate 5s linear infinite;
    }

/* Animation keyframes */
@keyframes animate {
    0% {
        transform: translateY(-100%);
    }

    100% {
        transform: translateY(100%);
    }
}

/* Styling for individual spans */
section span {
    position: relative;
    display: block;
    width: calc(6.25vw - 2px);
    height: calc(6.25vw - 2px);
    background: #181818;
    z-index: 2;
    transition: 1.5s;
}

    section span:hover {
        background: #0f0;
        transition: 0s;
    }

/* Sign-in form styles */
.signin {
    position: absolute;
    width: 400px;
    background: #222;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.9);
}

    .signin .content {
        position: relative;
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        gap: 40px;
    }

        .signin .content h2 {
            font-size: 2em;
            color: #0f0;
            text-transform: uppercase;
        }

        .signin .content .form {
            width: 100%;
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

            .signin .content .form .inputBox {
                position: relative;
                width: 100%;
            }

                .signin .content .form .inputBox input {
                    position: relative;
                    width: 100%;
                    background: #333;
                    border: none;
                    outline: none;
                    padding: 25px 10px 7.5px;
                    border-radius: 4px;
                    color: #fff;
                    font-weight: 500;
                    font-size: 1em;
                }

                .signin .content .form .inputBox i {
                    position: absolute;
                    left: 0;
                    padding: 15px 10px;
                    font-style: normal;
                    color: #aaa;
                    transition: 0.5s;
                    pointer-events: none;
                }

                .signin .content .form .inputBox input:focus ~ i,
                .signin .content .form .inputBox input:valid ~ i {
                    transform: translateY(-7.5px);
                    font-size: 0.8em;
                    color: #fff;
                }

            .signin .content .form .links {
                position: relative;
                width: 100%;
                display: flex;
                justify-content: space-between;
            }

                .signin .content .form .links a {
                    color: #fff;
                    text-decoration: none;
                }

                    .signin .content .form .links a:nth-child(2) {
                        color: #0f0;
                        font-weight: 600;
                    }

            /* Button instead of input[type="submit"] */
            .signin .content .form .inputBox button {
                padding: 10px;
                background: #0f0;
                color: #000;
                font-weight: 600;
                font-size: 1.35em;
                letter-spacing: 0.05em;
                cursor: pointer;
                border: none;
                border-radius: 4px;
                font-family: 'Quicksand', sans-serif;
            }

                .signin .content .form .inputBox button:active {
                    opacity: 0.6;
                }

/* Media queries for responsive design */
@media (max-width: 900px) {
    section span {
        width: calc(10vw - 2px);
        height: calc(10vw - 2px);
    }
}

@media (max-width: 600px) {
    section span {
        width: calc(20vw - 2px);
        height: calc(20vw - 2px);
    }
}