:root {
    color-scheme: light;
    --canvas: #faf7f2;
    --surface: #fffdf9;
    --ink: #2b1d12;
    --muted: #715d4e;
    --accent: #a94c0e;
    --focus: #d96d1a;
    --selected: #f1dfcf;
    --line: #dcc9b8;
    --canvas-glow: #fffdf9;
    --sheen: rgb(255 255 255 / 12%);
    --shadow: 0 .35rem 1.1rem rgb(43 29 18 / 7%);
    --button-shadow: 0 .15rem .4rem rgb(43 29 18 / 12%);
    font-family: system-ui, sans-serif;
    color: var(--ink);
    background: var(--canvas);
    background-image: linear-gradient(135deg, var(--canvas-glow), var(--canvas) 65%);
    line-height: 1.6;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--accent); text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
input, textarea, select { color: var(--ink); background-color: var(--surface); border-color: var(--muted); accent-color: var(--accent); }
button { color: var(--surface); background-color: var(--accent); background-image: linear-gradient(var(--sheen), transparent); border-color: var(--accent); box-shadow: inset 0 1px var(--sheen), var(--button-shadow); }
button:hover { color: var(--ink); background-color: var(--selected); border-color: var(--accent); }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible { outline-color: var(--focus); }
.skip-link { position: absolute; left: 1rem; top: -5rem; padding: .75rem; background: var(--surface); z-index: 1; }
.skip-link:focus { top: .5rem; }
.masthead { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem 2rem; padding: 1.25rem 5%; background: var(--surface); border-bottom: 1px solid var(--line); }
.masthead { background-image: linear-gradient(var(--sheen), transparent); box-shadow: 0 .15rem .65rem rgb(43 29 18 / 4%); }
.brand { font-family: ui-monospace, monospace; font-size: 1.5rem; text-decoration: none; color: var(--ink); }
.brand-logo { width: 2.5rem; height: 2.5rem; object-fit: cover; border-radius: 50%; vertical-align: middle; margin-inline-end: .65rem; }
.masthead span, .eyebrow, footer { color: var(--muted); }
.application { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 3rem; max-width: 78rem; padding: 2.5rem 5%; margin: auto; }
nav ul { list-style: none; padding: 0; margin: 0; }
nav a { display: block; padding: .75rem 1rem; border-left: 3px solid transparent; text-decoration: none; }
nav a[aria-current] { background: var(--selected); border-left-color: var(--accent); font-weight: 650; }
nav a:hover { text-decoration: underline; }
nav a:hover { background-color: var(--selected); }
nav a[aria-current] { background-image: linear-gradient(var(--sheen), transparent); }
button, nav a { transition: color 160ms ease, background-color 160ms ease, box-shadow 160ms ease; }
h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.2; margin: .4rem 0 1rem; letter-spacing: -.025em; }
h2 { font-size: 1.25rem; margin: 0; }
p { max-width: 65ch; }
.eyebrow { margin: 0; font-size: .875rem; }
.intro { font-size: 1.125rem; }
.overview { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 2rem; }
.overview section { background: var(--surface); border-top: 3px solid var(--accent); padding: 1.5rem; }
.overview section { background-image: linear-gradient(135deg, var(--sheen), transparent 65%); box-shadow: var(--shadow); }
code { overflow-wrap: anywhere; }
footer { max-width: 78rem; margin: auto; padding: 1rem 5% 2rem; font-size: .875rem; }
@media (max-width: 48rem) {
    .application { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1rem; }
    nav ul { display: flex; flex-wrap: wrap; }
    nav a { border-left: 0; border-bottom: 3px solid transparent; }
    nav a[aria-current] { border-bottom-color: var(--accent); }
    .overview { grid-template-columns: 1fr; }
}
@media (prefers-color-scheme: dark) {
    :root { color-scheme: dark; --canvas: #211a15; --surface: #2b211a; --ink: #f6eee5; --muted: #c4ad99; --accent: #f2a66d; --focus: #f2a66d; --selected: #463022; --line: #66503f; }
    :root { --canvas-glow: #30231b; --sheen: rgb(255 255 255 / 4%); --shadow: 0 .35rem 1.1rem rgb(0 0 0 / 18%); --button-shadow: 0 .15rem .4rem rgb(0 0 0 / 20%); }
}
@media (prefers-reduced-motion: reduce) {
    button, nav a { transition: none; }
}
@media (forced-colors: active) {
    :root, button, .masthead, nav a[aria-current], .overview section { background-image: none; box-shadow: none; }
}