/* One table of tokens, redefined once for a dark viewer. Everything below reads
   from it, so a colour or a rhythm is changed in exactly one place. */
:root {
    --ink: #1a1d21;
    --ink-soft: #4d5560;
    --paper: #fdfcfa;
    --paper-sunk: #f2efe9;
    --rule: #ddd8ce;
    --accent: #1f6f5c;
    --accent-ink: #ffffff;

    --step-1: 0.25rem;
    --step-2: 0.5rem;
    --step-3: 1rem;
    --step-4: 1.75rem;
    --step-5: 3rem;

    --radius: 0.5rem;
    --measure: 65ch;
}

@media (prefers-color-scheme: dark) {
    :root {
        --ink: #eceae6;
        --ink-soft: #a8b0ba;
        --paper: #16181b;
        --paper-sunk: #1f2226;
        --rule: #333840;
        --accent: #6fd3b5;
        --accent-ink: #10231e;
    }
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    /* The reader's own font, so the page costs no download and looks native
       on every system it is opened on. */
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, "Noto Sans", sans-serif;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0 var(--step-3);
    background: var(--paper);
    color: var(--ink);
}

main,
.masthead,
footer {
    max-width: var(--measure);
    margin-inline: auto;
}

/* Logical properties throughout: the same rules lay out a right-to-left page
   without a mirrored stylesheet. */
.masthead {
    display: flex;
    flex-wrap: wrap;
    gap: var(--step-3);
    align-items: baseline;
    justify-content: space-between;
    padding-block: var(--step-4);
    border-block-end: 1px solid var(--rule);
}

.wordmark {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--ink);
    text-decoration: none;
}

.languages {
    display: flex;
    gap: var(--step-3);
    font-size: 0.9375rem;
}

.languages [aria-current] {
    color: var(--ink-soft);
}

main {
    padding-block: var(--step-5) var(--step-4);
}

h1 {
    font-size: clamp(1.875rem, 1.3rem + 2.5vw, 2.75rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-block: 0 var(--step-4);
    text-wrap: balance;
}

h2 {
    font-size: 1.375rem;
    line-height: 1.25;
    margin-block: var(--step-5) var(--step-3);
}

p {
    margin-block: 0 var(--step-3);
}

main > p:first-of-type,
.lede {
    font-size: 1.1875rem;
    color: var(--ink-soft);
}

a {
    color: var(--accent);
    text-underline-offset: 0.15em;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--step-1);
}

footer {
    padding-block: var(--step-4) var(--step-5);
    border-block-start: 1px solid var(--rule);
    color: var(--ink-soft);
    font-size: 0.9375rem;
}

.documents {
    display: flex;
    flex-wrap: wrap;
    gap: var(--step-3);
}

/* A long legal page is read, not skimmed: give its headings room to separate
   one obligation from the next. */
main h2 + p {
    margin-block-start: 0;
}

main ul {
    padding-inline-start: var(--step-4);
}

main li {
    margin-block-end: var(--step-2);
}

/* The apex is a doorway, not a page to read: centre it and give it room. */
.chooser main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--step-4);
    min-height: 100svh;
    justify-content: center;
    text-align: center;
    padding-block: var(--step-5);
}

.chooser h1 {
    margin-block-end: 0;
}

.chooser .lede {
    max-width: 40ch;
    margin-block-end: 0;
}

.chooser .languages a {
    padding: var(--step-2) var(--step-3);
    border-radius: var(--radius);
    background: var(--paper-sunk);
    text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}