html {
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-color: #f2f2f2;
    display: flex;
    justify-content: center;
    align-items: stretch;
    height: 100vh;
}

.container {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    width: 100%;
}

.image-container {
    flex: 1;
    display: flex;
    justify-content: flex-start;
    align-items: stretch;
    padding: 20px;
    box-sizing: border-box;
}

    .image-container img {
        width: 600px;
        height: 600px;
        object-fit: cover;
    }

.form-container {
    flex: 1;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 40px;
}

.login-box {
    width: 900px;
    padding: 100px;
    background: #f2f2f2;
    box-sizing: border-box;
    /*box-shadow: 0 15px 25px rgba(0, 0, 0, .6);*/
    border-radius: 2px;
    color: #243746;
}

    .login-box h2 {
        margin: 0 0 30px;
        padding: 0;
        text-align: center;
    }

    .login-box .user-box {
        position: relative;
    }

        .login-box .user-box input {
            width: 100%;
            padding: 10px 0;
            font-size: 16px;
            color: #243746;
            margin-bottom: 30px;
            border: none;
            border-bottom: 1px solid #243746;
            outline: none;
            background: transparent;
        }

        .login-box .user-box label {
            position: absolute;
            top: 0;
            left: 0;
            padding: 10px 0;
            font-size: 16px;
            color: #243746;
            pointer-events: none;
            transition: .5s;
        }

        .login-box .user-box input:focus ~ label,
        .login-box .user-box input:valid ~ label {
            top: -20px;
            left: 0;
            color: #43BBC7;
            font-size: 12px;
        }

    .login-box form a {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        color: #43BBC7;
        font-size: 16px;
        text-decoration: none;
        text-transform: uppercase;
        overflow: hidden;
        transition: .5s;
        margin-top: 40px;
        letter-spacing: 4px
    }

    .login-box a:hover {
        background: #43BBC7;
        color: #fff;
        border-radius: 5px;
        box-shadow: 0 0 5px #43BBC7, 0 0 25px #43BBC7, 0 0 50px #43BBC7, 0 0 100px #43BBC7;
    }

    .login-box a span {
        position: absolute;
        display: block;
    }

        .login-box a span:nth-child(1) {
            top: 0;
            left: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, #03e9f4);
            animation: btn-anim1 1s linear infinite;
        }

@keyframes btn-anim1 {
    0% {
        left: -100%;
    }

    50%,100% {
        left: 100%;
    }
}

.login-box a span:nth-child(2) {
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, #03e9f4);
    animation: btn-anim2 1s linear infinite;
    animation-delay: .25s
}

@keyframes btn-anim2 {
    0% {
        top: -100%;
    }

    50%,100% {
        top: 100%;
    }
}

.login-box a span:nth-child(3) {
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent, #03e9f4);
    animation: btn-anim3 1s linear infinite;
    animation-delay: .5s
}

@keyframes btn-anim3 {
    0% {
        right: -100%;
    }

    50%,100% {
        right: 100%;
    }
}

.login-box a span:nth-child(4) {
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent, #03e9f4);
    animation: btn-anim4 1s linear infinite;
    animation-delay: .75s
}

@keyframes btn-anim4 {
    0% {
        bottom: -100%;
    }

    50%,100% {
        bottom: 100%;
    }
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #f2f2f2;
    text-align: center;
    padding: 10px;
}

.btn-login {
    background-color: #43BBC7;
    color: #fff;
    border: none;
    transition: box-shadow 0.3s;
    margin-left: 110px; /* Agrega esta línea para mover el botón hacia la derecha */
}

    .btn-login:hover {
        box-shadow: 0 0 10px 3px #67D2DD;
    }

    .btn-login:focus {
        outline: none;
        box-shadow: 0 0 10px 3px #67D2DD;
    }

    .btn-login span {
        color: #243746;
    }