/* ─────────────────────────────────────────────────────────────
* Nous — Interaction patterns
* Bespoke components that serve reading, writing, and reference:
* · Margin note demo wrapper
* · Footnote popover
* · Citation / bibliography patterns
* · TOC rail (IntersectionObserver scroll-spy)
* · Reader controls (font size, measure, theme)
* · Bookmark button · Settings dialog
*
* Every pattern uses tokens from tokens.css. Every interactive
* element respects `prefers-reduced-motion` via token-layer fallback.
* ───────────────────────────────────────────────────────────── */
/* ══ §1 Margin note demo ═══════════════════════════════════ *
* A 2-column wrapper that lifts margin-notes out into the gutter
* on wide viewports. Collapses to inline below 1024px. */
.mn-demo {
display: grid;
grid-template-columns: minmax(0, 1fr) 240px;
gap: var(--s-6);
align-items: start;
padding: var(--s-5) 0;
border-top: 1px solid var(--nous-rule-soft);
}
.mn-demo__body {
font-family: var(--ff-serif);
font-size: 17px;
line-height: 1.7;
color: var(--nous-ink-2);
max-width: var(--measure);
}
.mn-demo__body p { margin: 0 0 1em; }
.mn-demo__body p:last-child { margin-bottom: 0; }
.mn-demo__note {
font-family: var(--ff-serif);
font-style: italic;
font-size: 14px;
line-height: 1.55;
color: var(--nous-ink-3);
padding-top: var(--s-1);
border-top: 1px solid var(--nous-rule);
margin-top: var(--s-1);
}
.mn-demo__note em { color: var(--nous-ink); font-style: normal; font-weight: 500; }
@media (max-width: 1024px) {
.mn-demo { grid-template-columns: 1fr; gap: var(--s-3); }
.mn-demo__note {
padding: var(--s-3) var(--s-4);
border-top: 0;
border-left: 2px solid var(--nous-rule);
background: var(--nous-paper-2);
margin-top: 0;
max-width: var(--measure);
}
}
/* ══ §2 Highlight variants ═════════════════════════════════ *
* Semantic colour ≠ decorative colour. Each highlight variant
* carries a reading meaning the writer has chosen deliberately. */
.hl {
padding: 0 2px;
border-radius: 1px;
color: inherit;
background: color-mix(in oklab, var(--nous-ochre) 25%, transparent);
}
.hl--note { background: color-mix(in oklab, var(--nous-ochre) 28%, transparent); }
.hl--question { background: color-mix(in oklab, var(--nous-aegean) 20%, transparent); }
.hl--dispute { background: color-mix(in oklab, var(--nous-terracotta) 20%, transparent); }
/* ══ §3 Footnote popover ═══════════════════════════════════ *
* On hover/focus of a .fn-ref, reveal the corresponding
* .fn-body as a floating popover above the reference mark. */
.fn-ref-pop {
position: relative;
display: inline-block;
font-family: inherit;
}
.fn-ref-pop__mark {
font-feature-settings: "sups";
font-size: 0.72em;
vertical-align: super;
color: var(--nous-terracotta);
margin-left: 1px;
cursor: help;
border-bottom: 1px dotted var(--nous-terracotta);
}
.fn-ref-pop__body {
position: absolute;
left: 50%;
bottom: calc(100% + var(--s-2));
transform: translate(-50%, var(--s-2));
width: max-content;
max-width: 340px;
padding: var(--s-3) var(--s-4);
background: var(--nous-paper);
border: 1px solid var(--nous-rule);
font-family: var(--ff-serif);
font-style: italic;
font-size: 13px;
line-height: 1.55;
color: var(--nous-ink-2);
text-align: left;
box-shadow: 0 2px 16px -4px color-mix(in oklab, var(--nous-ink) 20%, transparent);
opacity: 0;
pointer-events: none;
z-index: 10;
transition:
opacity var(--dur-slow) var(--ease-out),
transform var(--dur-slow) var(--ease-out);
}
.fn-ref-pop__body em { color: var(--nous-ink); }
.fn-ref-pop:hover .fn-ref-pop__body,
.fn-ref-pop:focus-within .fn-ref-pop__body {
opacity: 1;
transform: translate(-50%, 0);
pointer-events: auto;
}
/* Arrow pointing down to the mark */
.fn-ref-pop__body::after {
content: "";
position: absolute;
top: 100%;
left: 50%;
transform: translateX(-50%);
border: 6px solid transparent;
border-top-color: var(--nous-rule);
}
/* ══ §4 Citation styles ════════════════════════════════════ *
* Four ways a reader may encounter a source — shown as demos. */
.cite-demo {
display: grid;
grid-template-columns: 1fr 1fr;
gap: var(--s-6);
margin-top: var(--s-5);
}
.cite-demo__card {
padding: var(--s-5) var(--s-6);
background: var(--nous-paper);
border: 1px solid var(--nous-rule);
font-family: var(--ff-serif);
font-size: 16px;
line-height: 1.65;
color: var(--nous-ink-2);
}
.cite-demo__card h4 {
font-family: var(--ff-sc);
font-size: 10px;
letter-spacing: 0.22em;
text-transform: uppercase;
color: var(--nous-ink-3);
margin: 0 0 var(--s-3);
font-weight: 500;
padding-bottom: var(--s-2);
border-bottom: 1px solid var(--nous-rule-soft);
}
.cite-demo__card p { margin: 0; }
.cite-demo__card cite {
font-style: italic;
color: var(--nous-ink-3);
}
/* Inline parenthetical — (Author 2023) */
.cite-inline {
color: var(--nous-ink-3);
font-style: italic;
}
/* ══ §5 Bibliography ═══════════════════════════════════════ *
* Hanging indent list — the reader-friendly academic form. */
.biblio {
font-family: var(--ff-serif);
font-size: 15px;
line-height: 1.6;
color: var(--nous-ink-2);
margin: var(--s-4) 0 0;
padding: 0;
list-style: none;
border-top: 1px solid var(--nous-rule);
padding-top: var(--s-4);
}
.biblio li {
padding-left: 2em;
text-indent: -2em;
margin: 0 0 var(--s-3);
}
.biblio li:last-child { margin-bottom: 0; }
.biblio .author { color: var(--nous-ink); font-variant: small-caps; letter-spacing: 0.04em; }
.biblio .title { font-style: italic; }
.biblio .pub { color: var(--nous-ink-3); }
/* ══ §6 TOC rail ═══════════════════════════════════════════ *
* Fixed right-side nav showing the current section. Desktop
* (≥1280px) only — below that it falls inline under the chapter
* folio as a single horizontal pill list.
*
* Current section marker driven by JS (IntersectionObserver),
* falling back to an :active / :focus-within highlight otherwise. */
.toc-rail {
position: fixed;
top: 50%;
right: var(--s-5);
transform: translateY(-50%);
max-width: 220px;
max-height: 70vh;
overflow-y: auto;
z-index: 15;
padding: var(--s-4) var(--s-5);
font-family: var(--ff-serif);
pointer-events: auto;
}
.toc-rail__label {
font-family: var(--ff-sc);
font-size: 10px;
letter-spacing: 0.22em;
text-transform: uppercase;
color: var(--nous-ink-4);
margin: 0 0 var(--s-3);
font-weight: 500;
}
.toc-rail__list {
list-style: none;
padding: 0;
margin: 0;
border-left: 1px solid var(--nous-rule);
padding-left: var(--s-4);
}
.toc-rail__list li { margin: var(--s-1) 0; }
.toc-rail__list a {
display: block;
padding: var(--s-1) 0;
font-family: var(--ff-serif);
font-size: 13px;
line-height: 1.4;
color: var(--nous-ink-3);
text-decoration: none;
position: relative;
transition: color var(--dur-fast) var(--ease-out);
}
.toc-rail__list a:hover { color: var(--nous-ink); }
.toc-rail__list a[aria-current="true"] {
color: var(--nous-terracotta);
}
.toc-rail__list a[aria-current="true"]::before {
content: "";
position: absolute;
left: calc(-1 * var(--s-4) - 1px);
top: 50%;
transform: translateY(-50%);
width: 3px;
height: 14px;
background: var(--nous-terracotta);
}
@media (max-width: 1279px) {
.toc-rail {
position: static;
transform: none;
max-width: none;
max-height: none;
padding: var(--s-4) 0 var(--s-5);
margin-bottom: var(--s-7);
border-bottom: 1px solid var(--nous-rule-soft);
}
.toc-rail__list {
border-left: 0;
padding-left: 0;
display: flex;
flex-wrap: wrap;
gap: var(--s-1) var(--s-5);
}
.toc-rail__list li { margin: 0; }
.toc-rail__list a[aria-current="true"]::before { display: none; }
.toc-rail__list a[aria-current="true"] {
border-bottom: 2px solid var(--nous-terracotta);
padding-bottom: 0;
}
}
/* ══ Reader controls ═══════════════════════════════════════ *
* Font size S · M · L, measure Narrow · Wide, theme Light · Dark.
* All write to :root as data-* attributes; tokens pick them up. */
.reader-control {
display: inline-flex;
align-items: center;
gap: var(--s-1);
padding: 2px;
border: 1px solid var(--nous-rule);
border-radius: 2px;
background: var(--nous-paper);
}
.reader-control button {
appearance: none;
border: 0;
background: transparent;
padding: var(--s-1) var(--s-3);
font-family: var(--ff-sc);
font-size: 10px;
letter-spacing: 0.22em;
text-transform: uppercase;
color: var(--nous-ink-3);
cursor: pointer;
border-radius: 1px;
transition:
color var(--dur-fast) var(--ease-out),
background var(--dur-fast) var(--ease-out);
}
.reader-control button:hover { color: var(--nous-ink); }
.reader-control button[aria-pressed="true"] {
color: var(--nous-paper);
background: var(--nous-ink);
}
/* ══ Bookmark button ═══════════════════════════════════════ *
* Plain button, small-caps label, terracotta when set. */
.bookmark-btn {
appearance: none;
border: 1px solid var(--nous-rule);
background: transparent;
padding: var(--s-2) var(--s-4);
font-family: var(--ff-sc);
font-size: 10px;
letter-spacing: 0.22em;
text-transform: uppercase;
color: var(--nous-ink-3);
cursor: pointer;
border-radius: 2px;
display: inline-flex;
align-items: center;
gap: var(--s-2);
transition:
color var(--dur-fast) var(--ease-out),
border-color var(--dur-fast) var(--ease-out);
}
.bookmark-btn:hover {
color: var(--nous-ink);
border-color: var(--nous-ink-3);
}
.bookmark-btn[aria-pressed="true"] {
color: var(--nous-terracotta);
border-color: var(--nous-terracotta);
}
.bookmark-btn::before {
content: "";
display: inline-block;
width: 8px;
height: 10px;
border: 1px solid currentColor;
clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 70%, 0 100%);
background: transparent;
transition: background var(--dur-fast) var(--ease-out);
}
.bookmark-btn[aria-pressed="true"]::before { background: currentColor; }
/* ══ Search field ══════════════════════════════════════════ *
* Native with editorial chrome. */
.search-field {
display: inline-flex;
align-items: center;
gap: var(--s-2);
padding: var(--s-2) var(--s-3);
border: 1px solid var(--nous-rule);
border-radius: 2px;
background: var(--nous-paper);
font-family: var(--ff-serif);
font-size: 14px;
color: var(--nous-ink-2);
min-width: 260px;
transition: border-color var(--dur-fast) var(--ease-out);
}
.search-field:focus-within { border-color: var(--nous-aegean); }
.search-field::before {
content: "";
width: 11px; height: 11px;
border: 1.5px solid var(--nous-ink-3);
border-radius: 50%;
flex-shrink: 0;
/* tail of magnifying glass */
background:
linear-gradient(currentColor, currentColor) 8px 9px / 1.5px 5px no-repeat;
transform: rotate(-45deg);
color: var(--nous-ink-3);
}
.search-field input {
border: 0;
outline: 0;
background: transparent;
font: inherit;
color: inherit;
flex: 1;
min-width: 0;
padding: 0;
}
.search-field input::placeholder { color: var(--nous-ink-4); font-style: italic; }
/* ══ Settings dialog ═══════════════════════════════════════ *
* Native