html {
    /* use a sensible root size for rem calculations */
    font-size: 16px;
}

body {
    font-family: Arial, sans-serif;
    font-size: 1rem; /* equals 16px */
    line-height: 1.5;
    color: #222;
}

h1 {
    font-size: 2.5rem; /* 40px */
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 2rem; /* 32px */
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

h3 {
    font-size: 1.5rem; /* 24px */
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

h4 {
    font-size: 1.25rem; /* 20px */
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.375rem; /* 22px */
    margin-top: 0.25rem;
}

.divider {
    height: 8px;
    background-color: #235a9f;
    margin: 20px 0;
}

.instruction {
    font-size: 1.625rem; /* ~26px */
    margin-bottom: 1rem;
}

.button-container {
    display: flex;
    justify-content: center;
    margin: 40px 0;
}

.oval-btn {
    padding: 1.25rem 3.75rem; /* 20px 60px */
    border-radius: 3.75rem; /* consistent with padding */
    border: 0.125rem solid #235a9f;
    background-color: white;
    font-size: 2rem; /* 32px */
    cursor: pointer;
    transition: 0.3s;
}

.oval-btn:hover {
    background-color: #e9f0ff;
}

/* Hidden box until button is clicked */
.info-box {
    /* max-width: 600px; */
    width: 70%;
    margin: 1.25rem auto;
    padding: 2.5rem;
    border-radius: 2.5rem;
    border: 0.125rem solid #235a9f;
    font-size: 1.5rem; /* 24px */
    line-height: 1.6;

    opacity: 0;
    transition: opacity 1s ease-in;
}

/* Class used to show it with fade-in */
.show {
    opacity: 1;
}

textarea, pre {
    font-family: inherit;
    font-size: 1rem;
}

.hidden {
    display: none;
}