*,
*::before,
*::after {
    box-sizing: border-box;
    text-rendering: optimizeLegibility;
    font-kerning: auto;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    text-align: center;
    background: url('https://i.pinimg.com/736x/91/7f/7e/917f7e79746395e3bc32002787c60a6e.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
h1 {
    font-size: 5vmin;
    margin: 1em 0;
    color: #4b2525;
    text-shadow: #817a7d .05em .05em 0;
}

h2 {
    font-size: 4vmin;
    color: rgb(143, 5, 5);
    line-height: 2.4;
}

h2 span {
    display: inline-block;
    background: #ffffff80;
    padding: .25em;
    border-bottom: 2px solid black;
    min-width: 1em;
    text-align: center;
}

h2 span + span {
    margin-left: .3em;
}

#output {
    width: 7em;
    font-family: monospace;
    font-size: 4vmin;
    margin: 1em auto;
    text-align: center;
    white-space: pre;
    letter-spacing: .125em;
    font-family: monospace;
    line-height: 1.2;

}

#guessed span {
    font-size: 4vmin;
    text-decoration: line-through;
    display: inline-block;
    padding: .25em;
}

#mensaje {
    margin-top: 1em;
    font-size: 3vmin;
    color: rgb(9, 46, 168);
    font-weight: bold;
    background-color: #8b7079fa;
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
}

[type=text] {
    opacity: 0;
}
#signup {
    background: #542e0d;
    color: rgb(223, 218, 222);
    font-size: 22px;
    padding: 10px 20px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    margin: 40px auto 30px; 
    display: block;
}

#signup:hover {
    background: rgb(139, 131, 123);
    color: black;
}