:root {
    color-scheme: light;
    --bg: #f6f7f9;
    --paper: #ffffff;
    --ink: #1f2933;
    --muted: #5f6b7a;
    --line: #d9dee5;
    --accent: #1264a3;
    --accent-soft: #e7f2fb;
    --warn: #8a5a00;
    --warn-soft: #fff4d6;
    --ok: #1c6b45;
    --ok-soft: #e6f4ec;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

header,
main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px;
}

header {
    padding-top: 40px;
    padding-bottom: 12px;
}

h1,
h2,
h3 {
    line-height: 1.2;
    margin: 0 0 12px;
}

h1 {
    font-size: 2rem;
}

h2 {
    margin-top: 8px;
    font-size: 1.45rem;
}

h3 {
    margin-top: 24px;
    font-size: 1.05rem;
}

p {
    margin: 0 0 14px;
}

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

.lead {
    max-width: 860px;
    color: var(--muted);
    font-size: 1.05rem;
}

.layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

nav {
    position: sticky;
    top: 16px;
    padding: 16px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
}

nav strong {
    display: block;
    margin-bottom: 10px;
}

nav a {
    display: block;
    padding: 7px 0;
    text-decoration: none;
}

section {
    margin-bottom: 24px;
    padding: 24px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
}

ul,
ol {
    margin-top: 8px;
    padding-left: 22px;
}

li {
    margin-bottom: 7px;
}

.note,
.warning,
.screenshot {
    margin: 18px 0;
    padding: 14px 16px;
    border-radius: 8px;
    border: 1px solid var(--line);
}

.note {
    background: var(--accent-soft);
    border-color: #b8d8ee;
}

.warning {
    background: var(--warn-soft);
    border-color: #e6c268;
    color: var(--warn);
}

.screenshot {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 16px;
    background: #f9fafb;
    align-items: center;
}

.shotbox {
    min-height: 96px;
    display: grid;
    place-items: center;
    border: 1px dashed #9aa7b5;
    border-radius: 6px;
    color: var(--muted);
    text-align: center;
    padding: 12px;
    background: #fff;
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 16px 0;
}

.field-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
    background: #fcfcfd;
}

.field-card strong {
    display: block;
    margin-bottom: 6px;
}

.tag {
    display: inline-block;
    margin-right: 6px;
    padding: 2px 7px;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .02em;
}

.must {
    background: var(--warn-soft);
    color: var(--warn);
}

.can {
    background: var(--ok-soft);
    color: var(--ok);
}

code {
    padding: 2px 5px;
    border-radius: 4px;
    background: #eef1f5;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: .92em;
}

@media (max-width: 840px) {

    header,
    main {
        padding: 18px;
    }

    .layout,
    .field-grid,
    .screenshot {
        grid-template-columns: 1fr;
    }

    nav {
        position: static;
    }
}