style.css

body {
    font-family: BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "Ubuntu", "Droid Sans", sans-serif;
    background-color: #f6f8fa;
    padding: 0 26px;
    font-size: 14px;
    word-wrap: break-word;
}

.container {
    display: grid;
    grid-template-columns: 1fr 0.5fr;
    gap: 0px;
    width: 100%;
    height: auto;
}

.list-column, .notes-column {
    padding: 10px;
    vertical-align: top;
}

.list-column {
    padding-right: 20px;
    border-right: 1px solid #ccc;
}

.notes-column {
    padding-left: 20px;
    background-image: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 24px,
        #ccc 24px,
        #ccc 25px
    );
    min-height: 500px;
    border-left: 1px solid #ccc;
}

hr {
    border: 0;
    height: 1px;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

h1 {
    line-height: 1.2;
    padding-bottom: 0.3em;
    border-bottom-width: 1px;
    border-bottom-style: solid;
}

h3 {
    padding-top: 0.3em;
    padding-bottom 0:
}

h1,
h2,
h3 {
    font-weight: normal;
}

blockquote {
    margin: 0 7px 0 5px;
    padding: 0 16px 0 10px;
    border-left-width: 5px;
    border-left-style: solid;
    background: rgba(127, 127, 127, 0.1);
    border-color: rgba(0, 122, 204, 0.5);
}

ul,
ol {
    padding-left: 1.5em;
    list-style-type: none;
}

li:last-child {
    margin-bottom: 0.3em;
}

code {
    font-family: Menlo, Monaco, Consolas, "Droid Sans Mono", "Courier New", monospace, "Droid Sans Fallback";
    font-size: 1em;
    line-height: 1.357em;
}