/* R3sourcer: a well-made onboarding binder. Cream paper, deep teal ink, one Dutch orange for checklists. */
:root {
  --desk: #EDE3CD;
  --desk-2: #E4D8BE;
  --paper: #FCF8EF;
  --paper-2: #F6EFE0;
  --ink: #1C2A29;
  --ink-soft: #4B5957;
  --ink-mute: #6D7976;
  --teal: #0E4F4B;
  --teal-2: #2B6B66;
  --teal-tint: #DDE9E3;
  --teal-tint-2: #C9DCD4;
  --orange: #E36A1B;
  --orange-ink: #A9480A;
  --orange-tint: #FBE6D4;
  --rule: #DCCFB4;
  --rule-soft: #E9DFCA;
  --serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --hand: "Caveat", "Bradley Hand", cursive;
  --wrap: 1280px;
  --gut: clamp(16px, 4vw, 40px);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--desk); color: var(--ink);
  font: 400 1.0625rem/1.7 var(--sans);
  background-image:
    radial-gradient(rgba(120, 96, 50, .05) 1px, transparent 1.2px),
    radial-gradient(rgba(120, 96, 50, .04) 1px, transparent 1.2px);
  background-size: 7px 7px, 11px 11px;
  background-position: 0 0, 3px 5px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { color: var(--orange-ink); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }
h1, h2, h3, h4 { font-family: var(--serif); color: var(--teal); font-weight: 600; line-height: 1.18; letter-spacing: -.01em; margin: 0; text-wrap: balance; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut); }
.skip { position: absolute; left: -999px; top: 0; background: var(--teal); color: #fff; padding: 8px 14px; z-index: 10; }
.skip:focus { left: 8px; }

.kicker { font: 700 .75rem/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--teal-2); margin: 0 0 .9rem; }
.kicker a { color: inherit; text-decoration: none; }
.kicker-o { color: var(--orange-ink); }
.meta { font-size: .85rem; color: var(--ink-mute); margin: 0; font-variant-numeric: tabular-nums; }
.lede { font-size: 1.18rem; line-height: 1.65; color: var(--ink-soft); max-width: 38em; }
.hand { font-family: var(--hand); font-weight: 600; color: var(--orange-ink); font-size: 1.35rem; line-height: 1; }

.btn { display: inline-block; background: var(--teal); color: var(--paper); text-decoration: none; font-weight: 600; padding: .85rem 1.35rem; border-bottom: 3px solid #06302D; transition: background .15s; }
.btn:hover { background: #0A3F3C; color: #fff; }
.btn-link { display: inline-flex; align-items: center; gap: .45em; font-weight: 600; color: var(--teal); text-decoration: none; border-bottom: 2px solid var(--orange); padding-bottom: 2px; }
.btn-link::after { content: "\2192"; transition: transform .15s; }
.btn-link:hover { color: var(--orange-ink); }
.btn-link:hover::after { transform: translateX(3px); }
.btn-link.small { font-size: .85rem; margin-top: .8rem; }

/* ---------- top line + masthead ---------- */
.topline { background: var(--teal); color: #CFE0DA; font-size: .78rem; letter-spacing: .02em; }
.topline-in { display: flex; justify-content: space-between; gap: 1rem; padding-top: 7px; padding-bottom: 7px; }
.topline-ed { display: none; }
.masthead { padding-top: 18px; }
.masthead-in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--teal); }
.brand img { width: 36px; height: 36px; }
.brand-name { font: 700 1.35rem/1 var(--serif); letter-spacing: -.015em; }
.brand-name em { font-style: italic; font-weight: 400; color: var(--orange-ink); }
.mast-nav { display: none; gap: 1.6rem; font-size: .92rem; font-weight: 500; }
.mast-nav a { color: var(--ink-soft); text-decoration: none; }
.mast-nav a:hover { color: var(--teal); text-decoration: underline; text-decoration-color: var(--orange); text-decoration-thickness: 2px; }

/* binder divider tabs */
.tabs { display: flex; gap: 4px; margin-top: 18px; overflow-x: auto; scrollbar-width: none; padding-bottom: 0; position: relative; z-index: 2; -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent); mask-image: linear-gradient(90deg, #000 88%, transparent); }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; display: flex; align-items: baseline; gap: .45em; white-space: nowrap;
  padding: .7rem 1.15rem .6rem; font-size: .88rem; font-weight: 600; text-decoration: none; color: var(--teal);
  background: var(--teal-tint); border: 1px solid var(--teal-tint-2); border-bottom: 0;
  clip-path: polygon(7px 0, calc(100% - 7px) 0, 100% 100%, 0 100%);
  transform: translateY(3px); transition: transform .15s, background .15s;
}
.tab:nth-child(even) { background: #E8EEE6; }
.tab:nth-child(3n) { background: #D4E4DD; }
.tab-n { font: 600 .72rem/1 var(--sans); color: var(--teal-2); font-variant-numeric: tabular-nums; }
.tab:hover { transform: translateY(0); color: var(--teal); }
.tab.is-on { background: var(--paper); transform: translateY(1px); color: var(--ink); }
.tab.is-on .tab-n { color: var(--orange-ink); }

/* ---------- the sheet ---------- */
.sheet-wrap { padding-bottom: 64px; }
.sheet {
  position: relative; background: var(--paper);
  padding: 28px 20px 48px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -24px rgba(70, 52, 20, .35), 6px 6px 0 -1px var(--paper-2), 6px 6px 0 0 var(--rule);
}

/* ---------- plate (image frame with SVG fallback) ---------- */
.plate { margin: 0; }
.plate-in {
  position: relative; aspect-ratio: 3 / 2; overflow: hidden;
  background-color: var(--paper-2); background-repeat: no-repeat; background-position: center; background-size: 62%;
  border: 1px solid var(--rule); outline: 6px solid var(--paper); outline-offset: -7px;
}
.plate-in img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* ---------- HOME: hero ---------- */
.hero { display: grid; gap: 28px; padding: 8px 0 36px; }
.hero h1 { font-size: clamp(2.2rem, 7.4vw, 4.1rem); line-height: 1.05; letter-spacing: -.025em; font-weight: 600; margin-bottom: 1.2rem; }
.hero h1 .ul { font-style: italic; font-weight: 400; background: url(/assets/underline.svg) no-repeat 0 94% / 100% .32em; padding-bottom: .06em; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.6rem; margin-top: 1.6rem; }
.hero-plate { position: relative; display: none; transform: rotate(1.2deg); box-shadow: 0 18px 30px -22px rgba(70,52,20,.55); }
.hero-plate::before, .hero-plate::after { content: ""; position: absolute; width: 86px; height: 24px; background: rgba(227,106,27,.22); z-index: 2; }
.hero-plate::before { top: -10px; left: 18px; transform: rotate(-6deg); }
.hero-plate::after { top: -8px; right: 22px; transform: rotate(5deg); background: rgba(14,79,75,.14); }
.hero-plate .plate-in { background-size: 70%; }
.hero-plate figcaption { position: absolute; right: 14px; bottom: -14px; z-index: 2; background: var(--paper); padding: 2px 10px; transform: rotate(-2deg); }

/* timeline strip */
.timeline { margin: 0 -20px; padding: 32px 20px 36px; background: var(--paper-2); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); position: relative; }
.tl-head { display: grid; gap: .4rem; margin-bottom: 22px; }
.tl-head h2 { font-size: 1.6rem; }
.tl-head p { color: var(--ink-soft); margin: 0; max-width: 34em; }
.tl { list-style: none; margin: 0 -20px; padding: 6px 20px 10px; display: grid; grid-auto-flow: column; grid-auto-columns: 72%; gap: 0; overflow-x: auto; scroll-snap-type: x mandatory; scroll-padding-inline: 20px; position: relative; scrollbar-width: thin; scrollbar-color: var(--teal-tint-2) transparent; }
.tl-stop { scroll-snap-align: start; position: relative; }
.tl-stop::before { content: ""; position: absolute; left: 0; right: 0; top: 43px; border-top: 2px dashed var(--teal-2); opacity: .55; }
.tl-stop:first-child::before { left: 22px; }
.tl-stop:last-child::before { right: auto; width: 22px; }
.tl-stop a { display: grid; gap: 6px; padding-right: 22px; text-decoration: none; color: var(--ink); position: relative; }
.tl-when { font: 600 1.25rem/1 var(--hand); color: var(--orange-ink); height: 22px; }
.tl-dot { width: 34px; height: 34px; display: grid; place-items: center; color: var(--teal); font: 700 .95rem/1 var(--serif); position: relative; z-index: 1; margin-left: 2px; }
.tl-dot::before { content: ""; position: absolute; inset: 3px; background: var(--paper); border: 2px solid var(--teal); transform: rotate(45deg); z-index: -1; }
.tl-stop:last-child .tl-dot { color: #fff; }
.tl-stop:last-child .tl-dot::before { background: var(--orange); border-color: var(--orange); }
.tl-ill { width: 132px; height: 99px; margin: 10px 0 2px -8px; transition: transform .2s; }
.tl-step { font: 600 1.3rem/1.2 var(--serif); color: var(--teal); }
.tl-text { font-size: .93rem; line-height: 1.55; color: var(--ink-soft); }
.tl-stop a:hover .tl-ill { transform: translateY(-4px) rotate(-1.5deg); }
.tl-stop a:hover .tl-step { color: var(--orange-ink); }

/* section heads */
.sec-head { margin: 0 0 22px; }
.sec-head h2 { font-size: clamp(1.6rem, 4.5vw, 2.3rem); }

/* contents / TOC */
.contents { padding: 48px 0 24px; }
.toc { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--teal); }
.toc-row a { display: grid; grid-template-columns: 52px 1fr auto; grid-template-areas: "n body count"; gap: 4px 14px; padding: 18px 0; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--rule); align-items: start; }
.toc-n { grid-area: n; font: 400 2.1rem/1 var(--serif); font-style: italic; color: var(--orange-ink); font-variant-numeric: lining-nums; }
.toc-ill { display: none; }
.toc-body { grid-area: body; display: grid; gap: 4px; }
.toc-title { font: 600 1.28rem/1.25 var(--serif); color: var(--teal); }
.toc-desc { font-size: .92rem; color: var(--ink-soft); line-height: 1.55; }
.toc-lead { display: none; }
.toc-count { grid-area: count; font-size: .8rem; font-weight: 600; color: var(--ink-mute); white-space: nowrap; padding-top: .35rem; }
.toc-row a:hover { background: linear-gradient(90deg, var(--orange-tint), transparent 70%); }
.toc-row a:hover .toc-title { color: var(--orange-ink); }

/* checklist + terms */
.split { display: grid; gap: 28px; padding: 36px 0 12px; }
.checklist-card { position: relative; background: #fff; padding: 34px 24px 28px; border: 1px solid var(--rule); border-top: 5px solid var(--orange); box-shadow: 0 14px 30px -22px rgba(70, 52, 20, .45); }
.checklist-card h2 { font-size: 1.55rem; margin-bottom: 1rem; }
.clip { position: absolute; top: -26px; left: 22px; width: 24px; height: auto; }
.checks { list-style: none; margin: 0 0 1.3rem; padding: 0; }
.checks li { position: relative; padding: .55rem 0 .55rem 2.1rem; border-bottom: 1px dashed var(--rule); line-height: 1.5; }
.checks li:last-child { border-bottom: 0; }
.checks li::before { content: ""; position: absolute; left: 0; top: .72rem; width: 20px; height: 20px; background: url(/assets/box.svg) no-repeat center / contain; }
.checks li:nth-child(-n+2)::before { background-image: url(/assets/tick.svg); }
.terms h2 { font-size: 1.55rem; margin-bottom: 1rem; }
.terms dl { margin: 0; border-top: 1px solid var(--rule); }
.term { padding: .8rem 0; border-bottom: 1px solid var(--rule); }
.term dt { font: 600 1.12rem/1.3 var(--serif); color: var(--teal); font-style: italic; }
.say { font: 500 .72rem/1 var(--sans); font-style: normal; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-mute); margin-left: .5em; }
.term dd { margin: .25rem 0 0; font-size: .94rem; color: var(--ink-soft); line-height: 1.55; }

/* loose-leaf cards */
.latest { padding: 44px 0 16px; }
.leaves { display: grid; gap: 18px; }
.leaf {
  position: relative; background: #fff; border: 1px solid var(--rule); padding: 26px 22px 20px 44px;
  background-image: radial-gradient(circle at 20px 36px, var(--desk-2) 5px, var(--rule) 5.5px, transparent 6.5px), radial-gradient(circle at 20px calc(100% - 36px), var(--desk-2) 5px, var(--rule) 5.5px, transparent 6.5px);
  background-repeat: no-repeat; transition: transform .15s, box-shadow .15s;
}
.leaf::before { content: ""; position: absolute; left: 36px; top: 0; bottom: 0; border-left: 1px solid #F2C9A9; }
.leaf:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -22px rgba(70, 52, 20, .5); }
.leaf-tab { position: absolute; top: -1px; right: 18px; margin: 0; }
.leaf-tab a { display: block; background: var(--teal-tint); color: var(--teal); font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 10px; text-decoration: none; }
.leaf h3 { font-size: 1.2rem; line-height: 1.3; margin: .6rem 0 .6rem; }
.leaf h3 a { color: var(--teal); text-decoration: none; }
.leaf h3 a::after { content: ""; position: absolute; inset: 0; }
.leaf h3 a:hover { color: var(--orange-ink); }
.leaf-sum { font-size: .92rem; color: var(--ink-soft); line-height: 1.6; }
.leaf-tab a { position: relative; z-index: 1; }

/* shelves */
.shelves { display: grid; gap: 0; margin-top: 40px; border-top: 2px solid var(--teal); }
.shelf { padding: 22px 0; border-bottom: 1px solid var(--rule); display: flex; flex-direction: column; align-items: flex-start; }
.shelf .btn-link { margin-top: auto; }
.shelf-n { font: 600 1.2rem/1 var(--hand); color: var(--orange-ink); margin: 0 0 .3rem; }
.shelf-h { font-size: 1.3rem; margin-bottom: .6rem; }
.shelf-h a { color: var(--teal); text-decoration: none; }
.shelf ul { margin: 0 0 1rem; padding: 0; list-style: none; }
.shelf li { padding: .35rem 0; font-size: .95rem; line-height: 1.45; }
.shelf li a { color: var(--ink); text-decoration: none; }
.shelf li a:hover { color: var(--teal); text-decoration: underline; }

/* ---------- breadcrumbs ---------- */
.crumbs ol { list-style: none; margin: 0 0 22px; padding: 0; display: flex; flex-wrap: wrap; gap: .3rem; font-size: .82rem; color: var(--ink-mute); }
.crumbs li + li::before { content: "/"; margin-right: .35rem; color: var(--rule); }
.crumbs a { color: var(--ink-soft); text-decoration: none; }
.crumbs a:hover { color: var(--teal); text-decoration: underline; }

/* ---------- CATEGORY ---------- */
.chap-head { display: grid; gap: 20px; padding-bottom: 32px; border-bottom: 2px solid var(--teal); position: relative; }
.chap-num { font: 300 6.5rem/.8 var(--serif); font-style: italic; color: var(--orange); letter-spacing: -.04em; }
.chap-text h1 { font-size: clamp(2.1rem, 7vw, 3.6rem); letter-spacing: -.025em; margin-bottom: 1rem; }
.chap-plate .plate-in { background-size: 58%; }
.chap-body { display: grid; gap: 32px; padding-top: 32px; }
.rail { order: 2; }
.rail-h { font: 700 .72rem/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute); margin: 0 0 .7rem; }
.rail-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.rail-list li a { display: grid; grid-template-columns: 2.4em 1fr; padding: .55rem 0; border-bottom: 1px solid var(--rule-soft); font-size: .9rem; line-height: 1.4; color: var(--ink-soft); text-decoration: none; }
.rail-list li a span { color: var(--ink-mute); font-variant-numeric: tabular-nums; font-size: .8rem; padding-top: .1em; }
.rail-list li a:hover { color: var(--teal); }
.rail-list li.is-on a { color: var(--teal); font-weight: 600; box-shadow: inset 3px 0 0 var(--orange); padding-left: 10px; grid-template-columns: 2.6em 1fr; background: var(--orange-tint); }
.rail-list li.is-on a span { color: var(--orange-ink); }
.two-col { display: grid; grid-template-columns: 1fr; column-gap: 32px; }
.sections-h { font-size: 1.1rem; font-family: var(--sans); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: .8rem; font-size: .78rem; }
.sec-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.sec-item { display: grid; grid-template-columns: 3.2rem 1fr; gap: 12px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.sec-n { font: 400 1.35rem/1.2 var(--serif); font-style: italic; color: var(--orange-ink); font-variant-numeric: lining-nums; }
.sec-main h3 { font-size: 1.3rem; margin-bottom: .45rem; line-height: 1.28; }
.sec-main h3 a { color: var(--teal); text-decoration: none; }
.sec-main h3 a:hover { color: var(--orange-ink); text-decoration: underline; text-decoration-color: var(--orange); }
.sec-main > p { color: var(--ink-soft); font-size: .96rem; line-height: 1.6; margin-bottom: .5rem; max-width: 42em; }
.empty-note { border: 1px dashed var(--rule); padding: 24px; background: var(--paper-2); }
.next-chap { display: grid; gap: 4px; margin-top: 32px; padding: 22px 24px; background: var(--teal); color: var(--paper); text-decoration: none; }
.next-chap .kicker { color: #A9CFC6; margin: 0; }
.next-title { font: 600 1.4rem/1.25 var(--serif); }
.next-chap:hover { background: #0A3F3C; color: #fff; }

/* ---------- ARTICLE ---------- */
.art-grid { display: grid; gap: 28px; }
.art-head { border-bottom: 2px solid var(--teal); padding-bottom: 22px; }
.art-head h1 { font-size: clamp(1.95rem, 6.2vw, 3.1rem); line-height: 1.1; letter-spacing: -.022em; margin-bottom: 1rem; max-width: 20em; }
.art-sec { display: block; font: 400 1.1rem/1 var(--serif); font-style: italic; color: var(--orange-ink); letter-spacing: 0; margin-bottom: .6rem; }
.art-rail { order: 3; }
.art-main { min-width: 0; }

.short { position: relative; background: #fff; border: 1px solid var(--rule); border-left: 5px solid var(--teal); padding: 26px 22px 20px; margin: 8px 0 34px; box-shadow: 0 14px 30px -24px rgba(70, 52, 20, .5); }
.short .clip { left: auto; right: 26px; top: -24px; }
.short-h { font: 600 1.4rem/1 var(--hand); color: var(--orange-ink); margin: 0 0 .5rem; }
.short p:last-child { margin: 0; font-size: 1.04rem; line-height: 1.65; }

.prose { font-size: 1.075rem; line-height: 1.78; max-width: 42rem; counter-reset: h2; }
.prose > * + * { margin-top: 0; }
.prose p { margin: 0 0 1.15em; }
.prose h2 { counter-increment: h2; font-size: clamp(1.45rem, 4vw, 1.85rem); margin: 2.4em 0 .7em; padding-top: 1.1em; border-top: 1px solid var(--rule); position: relative; }
.prose h2::before { content: counter(h2, decimal-leading-zero); display: block; font: 700 .72rem/1 var(--sans); letter-spacing: .14em; color: var(--orange-ink); margin-bottom: .7em; }
.prose h3 { font-size: 1.25rem; margin: 1.8em 0 .5em; color: var(--ink); }
.prose a { color: var(--teal); text-decoration-color: var(--orange); text-decoration-thickness: 2px; }
.prose strong { font-weight: 700; color: var(--ink); }
.prose ul, .prose ol { margin: 0 0 1.4em; padding: 0; list-style: none; }
.prose ul li { position: relative; padding-left: 1.9rem; margin: 0 0 .6em; }
.prose ul li::before { content: ""; position: absolute; left: 2px; top: .42em; width: 16px; height: 16px; background: url(/assets/tick.svg) no-repeat center / contain; }
.prose ol { counter-reset: li; }
.prose ol li { counter-increment: li; position: relative; padding-left: 2.4rem; margin: 0 0 .7em; }
.prose ol li::before { content: counter(li); position: absolute; left: 0; top: .1em; width: 1.6rem; height: 1.6rem; display: grid; place-items: center; background: var(--teal); color: var(--paper); font: 700 .8rem/1 var(--sans); }
.prose blockquote { margin: 1.8em 0; padding: 18px 22px 18px 58px; background: var(--orange-tint); border-left: 4px solid var(--orange); position: relative; font-size: 1.02rem; }
.prose blockquote::before { content: ""; position: absolute; left: 20px; top: 20px; width: 24px; height: 24px; background: url(/assets/warn.svg) no-repeat center / contain; }
.prose blockquote p:last-child { margin: 0; }
.prose hr { border: 0; border-top: 1px dashed var(--rule); margin: 2em 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: .9rem; line-height: 1.5; margin: 1.6em 0 2em; background: #fff; border: 1px solid var(--rule); font-variant-numeric: tabular-nums; display: block; overflow-x: auto; }
.prose thead th { background: var(--teal); color: var(--paper); text-align: left; font-weight: 600; padding: .75rem .9rem; vertical-align: bottom; font-size: .82rem; letter-spacing: .02em; }
.prose tbody td, .prose tbody th { padding: .7rem .9rem; border-top: 1px solid var(--rule-soft); vertical-align: top; text-align: left; }
.prose tbody tr:nth-child(even) { background: #FBF6EC; }
.prose tbody td:first-child, .prose tbody th { font-weight: 600; color: var(--teal); }
@media (min-width: 720px) { .prose table { display: table; } }

.goes-wrong { max-width: 42rem; margin: 44px 0 0; padding: 26px 24px 10px; background: var(--paper-2); border: 1px solid var(--rule); border-top: 5px solid var(--orange); }
.goes-wrong h2 { display: flex; align-items: center; gap: .6rem; font-size: 1.3rem; margin-bottom: .8rem; }
.goes-wrong .checks li::before { background-image: url(/assets/box.svg); }

.faq { max-width: 42rem; margin-top: 48px; }
.faq h2, .related h2 { font-size: 1.6rem; margin-bottom: 1rem; }
.faq details { border-top: 1px solid var(--rule); }
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; display: grid; grid-template-columns: 2rem 1fr 1.2rem; gap: .5rem; align-items: start; padding: 1rem 0; font: 600 1.08rem/1.4 var(--serif); color: var(--teal); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.5rem/1 var(--sans); color: var(--orange-ink); text-align: right; }
.faq details[open] summary::after { content: "\2212"; }
.q-mark { font: 400 1.3rem/1 var(--hand); color: var(--orange-ink); font-weight: 700; padding-top: .05em; }
.faq-a { padding: 0 0 1rem 2.5rem; color: var(--ink-soft); font-size: .98rem; }
.faq-a p { margin: 0; }

.related { margin-top: 52px; }
.leaves-2 .leaf { padding-bottom: 18px; }

.chap-strip { margin: 56px -20px -48px; padding: 28px 20px 32px; background: var(--paper-2); border-top: 1px solid var(--rule); }
.chap-strip ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.chap-strip a { display: grid; gap: 4px; padding: 12px; background: var(--paper); border: 1px solid var(--rule); text-decoration: none; color: var(--teal); height: 100%; }
.chap-strip img { width: 72px; height: 54px; }
.cs-n { font: 600 1rem/1 var(--hand); color: var(--orange-ink); font-size: 1.15rem; }
.cs-t { font: 600 .95rem/1.25 var(--serif); }
.chap-strip li.is-on a { border-color: var(--orange); box-shadow: inset 0 -3px 0 var(--orange); }
.chap-strip a:hover { border-color: var(--teal-2); }

/* ---------- ABOUT / 404 ---------- */
.about-head { max-width: 46rem; padding-bottom: 26px; border-bottom: 2px solid var(--teal); margin-bottom: 30px; }
.about-head h1, .lost h1 { font-size: clamp(2.2rem, 7vw, 3.6rem); letter-spacing: -.025em; margin-bottom: 1rem; }
.about-grid { display: grid; gap: 32px; }
.about .prose h2::before { content: none; }
.about-side { background: #fff; border: 1px solid var(--rule); border-top: 5px solid var(--orange); padding: 22px; align-self: start; }
.about-side img { width: 150px; margin: 0 0 12px; }
.about-toc { margin-top: 40px; }
.lost { max-width: 46rem; padding: 20px 0; }
.lost > img { width: 180px; margin-bottom: 18px; }
.lost .rail-list { margin: 26px 0 30px; }

/* ---------- footer: the back cover ---------- */
.cover { background: var(--teal); color: #CFE0DA; padding: 56px 0 0; font-size: .92rem; }
.cover a { color: #F3EEE2; text-decoration: none; }
.cover a:hover { color: #FFB27A; text-decoration: underline; }
.cover-in { display: grid; gap: 36px; padding-bottom: 40px; }
.cover-name { font: 700 1.7rem/1 var(--serif); color: var(--paper); margin-bottom: .8rem; }
.cover-name em { font-weight: 400; color: #FFB27A; }
.cover-tag { max-width: 30em; line-height: 1.6; }
.cover-small { font-size: .8rem; color: #9DBDB5; max-width: 32em; }
.cover-h { font: 700 .72rem/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: #9DBDB5; margin-bottom: 1rem; }
.cover ol, .cover ul { list-style: none; margin: 0; padding: 0; }
.cover li { padding: .3rem 0; }
.cover-toc a span { display: inline-block; width: 2.2em; color: #FFB27A; font-variant-numeric: tabular-nums; }
.cover-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .6rem 2rem; padding-top: 18px; padding-bottom: 22px; border-top: 1px solid rgba(207, 224, 218, .2); font-size: .78rem; color: #9DBDB5; }

/* ---------- tablet ---------- */
@media (min-width: 720px) {
  .hero-plate { display: block; }
  .topline-ed { display: inline; }
  .mast-nav { display: flex; }
  .sheet { padding: 44px 48px 64px 76px; }
  .sheet::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 56px;
    background: radial-gradient(circle at 28px 50%, var(--desk) 8px, #D2C3A3 8.5px, #D2C3A3 9.5px, transparent 10px) 0 60px / 56px 300px repeat-y;
    border-right: 1px solid #F0D2BA;
  }
  .timeline { margin: 0 -48px 0 -76px; padding: 40px 48px 44px 76px; }
  .tl { margin: 0 -48px 0 -76px; padding: 6px 48px 10px 76px; grid-auto-columns: 38%; scroll-padding-inline: 76px; }
  .leaves { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
  .chap-strip { margin: 64px -48px -64px -76px; padding: 32px 48px 36px 76px; }
  .chap-strip ol { grid-template-columns: repeat(4, 1fr); }
  .two-col { grid-template-columns: 1fr 1fr; }
  .cover-in { grid-template-columns: 1.3fr 1fr .7fr; }
  .shelves { grid-template-columns: repeat(2, 1fr); column-gap: 40px; }
  .toc-ill { display: block; grid-area: ill; width: 96px; height: 72px; }
  .toc-row a { grid-template-columns: 64px 96px 1fr auto; grid-template-areas: "n ill body count"; gap: 4px 24px; align-items: center; }
}

/* ---------- desktop ---------- */
@media (min-width: 1080px) {
  .hero { grid-template-columns: 1.25fr .75fr; gap: 64px; align-items: center; padding: 0 0 40px; }
  .hero h1 { font-size: 3.6rem; }
  .hero .lede { font-size: 1.12rem; }
  .timeline { padding-top: 34px; padding-bottom: 44px; }
  .tl-head { grid-template-columns: auto 1fr; align-items: end; gap: 2.5rem; }
  .tl-head p { justify-self: end; max-width: 30em; }
  .tl { grid-auto-flow: row; grid-template-columns: repeat(6, 1fr); overflow: visible; margin: 0; padding: 6px 0 0; }
  .tl-stop a { padding-right: 20px; }
  .tl-ill { width: 100%; max-width: 170px; height: auto; aspect-ratio: 4 / 3; }
  .contents { padding-top: 64px; }
  .toc { display: grid; grid-template-columns: 1fr 1fr; column-gap: 56px; }
  .toc-row a { grid-template-columns: 56px 84px 1fr auto; gap: 4px 20px; min-height: 100%; }
  .toc-ill { width: 84px; height: 63px; }
  .leaves { grid-template-columns: repeat(3, 1fr); }
  .leaves-2 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr 1.1fr; gap: 64px; padding-top: 56px; }
  .shelves { grid-template-columns: repeat(4, 1fr); column-gap: 32px; }

  .chap-head { grid-template-columns: 150px 1fr 380px; gap: 36px; align-items: end; }
  .chap-num { font-size: 10rem; align-self: start; margin-top: -.08em; }
  .chap-body { grid-template-columns: 250px 1fr; gap: 56px; }
  .rail { order: 0; }
  .sec-item { grid-template-columns: 4rem 1fr; }

  .art-grid { grid-template-columns: 240px minmax(0, 1fr); column-gap: 64px; row-gap: 32px; }
  .art-head { grid-column: 1 / -1; display: grid; grid-template-columns: 240px 1fr; column-gap: 64px; }
  .art-head > * { grid-column: 2; }
  .art-sec { position: absolute; }
  .art-head h1 { position: relative; }
  .art-head h1 .art-sec { position: absolute; left: calc(-240px - 64px); top: .12em; width: 240px; text-align: right; font-size: 3.1rem; line-height: 1; color: var(--orange); margin: 0; }
  .art-rail { order: 0; grid-row: 2; }
  .rail-sticky { position: sticky; top: 24px; }
  .rail-secs li a { font-size: .84rem; }
  .art-main { grid-row: 2; grid-column: 2; }
  .short { padding: 30px 32px 24px; }
  .prose h2::before { position: absolute; left: -4.2rem; top: 1.45em; width: 3rem; text-align: right; margin: 0; font-size: .8rem; }
  .chap-strip ol { grid-template-columns: repeat(8, 1fr); }
  .about-grid { grid-template-columns: 1fr 300px; gap: 64px; }
}
@media (min-width: 1280px) {
  .sheet { padding: 52px 64px 72px 96px; }
  .sheet::before { width: 64px; background-position: 0 60px; background-size: 64px 300px; background-image: radial-gradient(circle at 32px 50%, var(--desk) 8px, #D2C3A3 8.5px, #D2C3A3 9.5px, transparent 10px); }
  .timeline { margin: 0 -64px 0 -96px; padding: 48px 64px 52px 96px; }
  .chap-strip { margin: 72px -64px -72px -96px; padding: 36px 64px 40px 96px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
@media print { .topline, .tabs, .cover, .rail, .chap-strip { display: none; } body, .sheet { background: #fff; box-shadow: none; } }