body {
    font-family: 'Segoe UI', sans-serif;
    margin: 16px;
    background-color: #f5f5f5;
    font-size: 18px;
    line-height: 1.6;
}

h1 {
    text-align: center;
    margin: 1em auto .6em;
    line-height: 1.1;
    color: #006bff;
    font-size: 2.5em;
}

.gbm-image {
    display: block;
    margin: 0 auto -1em;
    width: 100%;
    max-width: 320px;
    box-sizing: border-box;
    padding: 2px;
    background-color: #fff;
    border-radius: 4px;
}

.content {
    max-width: 768px;
    margin: 0 auto 128px;
}

h2 {
    margin: 2em 0 0;
    font-size: 1.5em;
    line-height: 1.1;
    color: #333;
}

h3 {
    font-size: 1em;
    margin-bottom: 0;
    font-style: italic;
}

p {
    margin: .5em 0 1em;
}

.math {
    display: inline-block;
    font-family: monospace;
    font-size: .9em;
    padding: 8px 12px;
    margin-top: 10px;
    background-color: rgba(0, 0, 0, .06);
    font-weight: 600;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, .1);
}

.graph {
    margin: 1em auto .8em;
    background-color: #fff;
    padding: 8px 16px 1px;
    border-radius: 4px;
}

button {
    background-color: #1d77f4;
    background-color: rgba(29, 119, 244, 1);
    background-color: hsla(215 91% 54%);
    color: #fff;
    border: none;
    padding: 8px 14px;
    display: flex;
    justify-content: center;
    gap: .6em;
    margin: 0 auto;
    cursor: pointer;
    border-radius: 2em;
    font: inherit;
    font-size: .8em;
    transition: background-color .08s;
}

button:hover {
    background-color: hsla(215 91% 50%);
}

button:active {
    background-color: hsla(215 91% 45%);
}

button svg {
    height: 1.3em;
    pointer-events: none;
}

button span {
    pointer-events: none;
    line-height: 1.3;
    font-weight: 600;
}

a,
a:visited {
    color: #006bff;
}