/*
 * Site chrome shared by every public page: skip link, masthead, footer,
 * section heads, FAQ and endnotes. Tokens and primitives live in brand.css.
 */

/* ── Skip link ───────────────────────────────────────────────────────────── */
.skip-link {
    position: absolute;
    left: .75rem;
    top: -5rem;
    z-index: 100;
    padding: .8em 1.1em;
    background: var(--ink);
    color: var(--paper);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
}

.skip-link:focus { top: .75rem; outline-color: var(--marker-deep); }

/* ── Masthead ────────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--paper);
    border-bottom: var(--rule);
}

.site-header__in {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-height: 4rem;
}

.wordmark {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    margin-right: auto;
    font: 600 1.5rem/1 var(--font-display);
    font-variation-settings: 'opsz' 36;
    letter-spacing: -.028em;
    text-decoration: none;
    white-space: nowrap;
}

.wordmark__hl {
    font-style: italic;
    font-weight: 480;
    padding: .06em .16em .06em .05em;
    margin-left: .01em;
    background: var(--marker-stroke) no-repeat 0 68% / 100% 62%;
}

.site-nav { display: flex; align-items: center; gap: .15rem; }

.site-nav__list {
    display: flex;
    align-items: center;
    gap: .15rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a:not(.btn) {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 .75rem;
    font-size: var(--step--1);
    font-weight: 500;
    letter-spacing: .01em;
    text-decoration: none;
    border-radius: var(--radius);
}

.site-nav a:not(.btn):hover { text-decoration: underline; text-decoration-color: var(--pencil); text-decoration-thickness: 2px; }

.site-nav__signin { margin-left: .5rem; color: var(--ink-soft); }
.site-nav .btn { margin-left: .6rem; }

.nav-toggle {
    display: none;
    align-items: center;
    gap: .5em;
    min-height: 44px;
    padding: 0 .9rem;
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    background: transparent;
    color: var(--ink);
    font: 600 var(--step--1)/1 var(--font-mono);
    letter-spacing: .08em;
    text-transform: uppercase;
    cursor: pointer;
}

.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars i { display: block; height: 2px; background: currentColor; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 59.99em) {
    .nav-toggle { display: inline-flex; }

    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: .5rem 1.25rem 1.5rem;
        background: var(--paper);
        border-bottom: var(--rule-ink);
        box-shadow: 0 24px 40px -24px rgba(23, 20, 15, .35);
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
    }

    .site-header.is-open .site-nav { display: flex; }

    .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
    .site-nav__list li { border-bottom: var(--rule); }

    .site-nav a:not(.btn) {
        min-height: 52px;
        padding: 0 .25rem;
        font: 500 var(--step-1)/1.1 var(--font-display);
        font-variation-settings: 'opsz' 40;
        letter-spacing: -.01em;
    }

    .site-nav__signin { margin: 0; border-bottom: var(--rule); }
    .site-nav .btn { margin: 1.25rem 0 0; }

    /* No script, no toggle: lay the menu open instead of hiding it. */
    @media (scripting: none) {
        .nav-toggle { display: none; }
        .site-header { position: static; }
        .site-header__in { flex-wrap: wrap; }
        .site-nav { display: flex; position: static; width: 100%; padding: 0 0 1rem; border: 0; box-shadow: none; max-height: none; }
    }
}

/* ── Section furniture ───────────────────────────────────────────────────── */
.section { padding-block: clamp(4.5rem, 3rem + 6vw, 9rem); }
.section--ruled { border-top: var(--rule); }
.section--deep { background: var(--paper-deep); border-block: var(--rule); }

.sec-head { margin-bottom: clamp(2rem, 1.5rem + 2.5vw, 4rem); }

.sec-head .folio {
    display: flex;
    align-items: center;
    gap: 1em;
    margin: 0 0 1.6rem;
    max-width: none;
}

.sec-head .folio::after { content: ''; flex: 1; border-top: var(--rule); }
.sec-head .folio b { color: var(--ink); font-weight: 600; }

.sec-head h2 { max-width: 17ch; margin-bottom: 0; }
.sec-head--wide h2 { max-width: 22ch; }

.lede {
    font-size: var(--step-1);
    line-height: 1.45;
    color: var(--ink-soft);
    max-width: 46ch;
}

/* ── FAQ ─────────────────────────────────────────────────────────────────── */
.faq { border-top: var(--rule-ink); }

.faq details { border-bottom: var(--rule); }

.faq summary {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.15rem 0;
    min-height: 44px;
    cursor: pointer;
    list-style: none;
    font: 520 var(--step-1)/1.2 var(--font-display);
    font-variation-settings: 'opsz' 40;
    letter-spacing: -.012em;
}

.faq summary::-webkit-details-marker { display: none; }

/* A drawn plus that the pencil turns into a minus. */
.faq summary::after {
    content: '';
    flex: none;
    width: 1.1rem;
    height: 1.1rem;
    margin-top: .2em;
    background:
        linear-gradient(var(--pencil), var(--pencil)) center / 100% 2.5px no-repeat,
        linear-gradient(var(--pencil), var(--pencil)) center / 2.5px 100% no-repeat;
    transition: transform .2s ease;
}

.faq details[open] summary::after {
    background: linear-gradient(var(--pencil), var(--pencil)) center / 100% 2.5px no-repeat;
    transform: rotate(180deg);
}

.faq summary:hover { color: var(--pencil-deep); }

.faq__a { padding: 0 2.5rem 1.4rem 0; color: var(--ink-soft); }
.faq__a p:last-child { margin-bottom: 0; }

/* ── Endnotes ────────────────────────────────────────────────────────────── */
.fn-ref {
    font: 600 .62em/1 var(--font-mono);
    vertical-align: super;
    margin-left: .1em;
    white-space: nowrap;
}

.fn-ref a {
    display: inline-block;
    padding: .25em .2em;
    margin: -.25em 0;
    color: var(--pencil-deep);
    text-decoration: none;
}

.fn-ref a:hover { text-decoration: underline; }

.endnotes {
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: note;
    font-size: var(--step--1);
    line-height: 1.55;
}

.endnotes li {
    counter-increment: note;
    position: relative;
    padding: .9em 0 .9em 2.6em;
    border-top: 1px solid currentColor;
    border-top-color: color-mix(in srgb, currentColor 22%, transparent);
    max-width: 76ch;
}

.endnotes li::before {
    content: counter(note);
    position: absolute;
    left: 0;
    top: .95em;
    font: 600 1em/1.55 var(--font-mono);
}

.endnotes li:target { background: var(--marker-stroke) no-repeat 0 50% / 100% 80%; color: var(--ink); }
.endnotes cite { font-style: italic; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.site-footer {
    border-top: var(--rule-ink);
    padding-block: clamp(2.5rem, 2rem + 2vw, 4rem) 2rem;
    font-size: var(--step--1);
}

.site-footer__top {
    display: grid;
    gap: 2rem var(--gutter);
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
}

.site-footer__brand p { color: var(--ink-soft); max-width: 40ch; margin-top: .6rem; }

.site-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0 1.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-footer__links a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    text-decoration-color: transparent;
}

.site-footer__links a:hover { text-decoration-color: var(--pencil); }

.site-footer__base {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .5rem 2rem;
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: var(--rule);
    color: var(--ink-faint);
}

.site-footer__base p { margin: 0; max-width: none; }
.site-footer__device { color: var(--ink-soft); }

@media (min-width: 60em) {
    .site-footer__top { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
    .site-footer__links { justify-content: flex-end; }
}