:root   {
    background-color: #ecf5ff;
    font-size: 62.5%;
}

* {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
}

h1,
h2,
h3,
h4 {
    margin-bottom: 1rem;
}

h1 {
    font-size: 5.4rem;
    color: purple;
    margin-bottom: 5rem;
}

h1 > span {
    font-size: 5.4rem;
    font-weight: 500;
}
h2 {
    font-size: 4.2rem;
    margin-bottom: 4rem;
    font-weight: 700;
}

h3 {
    font-size: 2.8rem;
    font-weight: 500;
}

#code{
     margin-bottom: 2rem;
}
#instructions {
    font-size: 2rem;
    color: purple;
    margin-bottom: 2rem;
}

/*UTILITIES*/

.container {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 80rem;
    margin: 0 auto;
    padding: 2rem;
}

.container > * {
    width: 100%;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.flex-center {
    justify-content: center;
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

/* BUTTONS */

.btn {
    font-size: 1.8rem;
    padding: 1rem;
    width: 20rem;
    text-align: center;
    border: 0.1rem solid violet;
    margin-bottom: 1rem;
    text-decoration: none;
    color: white;
    background-color: purple;
    border-radius: 1rem;
}

.btn:hover {
    cursor: pointer;
    box-shadow: 0 0.4rem 1.4rem 0 rgba(140, 1, 142, 1);
    transform: translateY(-0.1rem)
    transition: transform 150ms;
}

.btn[disabled]:hover {
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* HUD */

#hud {
    display: flex;
    justify-content: space-between;
    padding-top: 1.5rem;
}

#hud a {
    color: violet;
    text-decoration: none;
    padding-left: 1.5rem;
}

.hud-prefix {
    text-align: center;
    font-size: 1.5rem;
    padding-right: 1.5rem;
    color: violet;
}

p {
    display: inline-block;
    color: violet;
    text-align: center;
}

#score {
    font-size: 2.3rem;
    font-weight: 1500;
    background-color: violet;
    color:  white;
    padding: 1rem;
    border-radius: 1.5rem;
}
/* FORMS */

form {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

input {
    margin-bottom: 1rem;
    width: 20rem;
    padding: 1.5rem;
    font-size: 1.8rem;
    border: none;
    box-shadow: 0 0.01rem 1.4rem 0 rgba(140, 1, 142, 0.5);
}

input::placeholder {
    color: #aaa
}