:root {
    color-scheme: light;
    --background: #ffffff;
    --surface: #f5f7f8;
    --border: #d8dee3;
    --text: #202428;
    --muted: #5d6770;
    --link: #075fa9;
    --link-hover: #03477f;
    --accent: #163b57;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.65;
}

main {
    width: min(960px, calc(100% - 40px));
    margin: 0 auto;
    padding: 56px 0 72px;
}

.toc-page {
    width: min(720px, calc(100% - 40px));
}

h1,
h2,
h3 {
    color: var(--accent);
    line-height: 1.25;
}

h1 {
    margin: 0 0 28px;
    font-size: clamp(2rem, 5vw, 2.75rem);
}

h2 {
    margin: 44px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    font-size: 1.55rem;
}

h3 {
    margin: 30px 0 12px;
    font-size: 1.2rem;
}

a {
    color: var(--link);
}

a:hover,
a:focus-visible {
    color: var(--link-hover);
}

.back-link {
    display: inline-block;
    margin-bottom: 24px;
}

.lede {
    color: var(--muted);
    font-size: 1.08rem;
}

nav ol {
    margin: 0;
    padding-left: 1.5rem;
}

nav li {
    margin: 14px 0;
    padding-left: 6px;
}

nav li a {
    font-size: 1.15rem;
    font-weight: 700;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 11px 12px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    background: var(--surface);
}

code,
pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

code {
    overflow-wrap: anywhere;
}

pre {
    overflow-x: auto;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: var(--surface);
    line-height: 1.45;
}

.notice {
    margin: 24px 0;
    padding: 14px 18px;
    border-left: 4px solid var(--accent);
    background: var(--surface);
}

details {
    margin: 12px 0;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 5px;
}

summary {
    color: var(--accent);
    cursor: pointer;
    font-weight: 700;
}

details ul {
    columns: 2;
    margin-bottom: 4px;
}

.sector-parent {
    color: var(--muted);
}

@media (max-width: 600px) {
    main,
    .toc-page {
        width: min(100% - 28px, 960px);
        padding-top: 32px;
    }

    th,
    td {
        padding: 9px;
    }

    details ul {
        columns: 1;
    }
}