/*
Theme Name: Vellum
Description: Herbarium & botanical archive.
Version: 1.0
*/

/* ============================================================
   Vellum breaks the studio's recurring skeleton on purpose:
   - a LIGHT, high-key paper palette (not another dark theme)
   - an editorial serif voice (Spectral), not a grotesque hero
   - a persistent sticky-pane split screen (not a single scroll
     column behind a full-bleed WebGL hero)
   - roman-numeral plate numbers as the structural device (not a
     mono uppercase spec-stamp)
   ============================================================ */
:root {
	--paper: #F4F1E8;
	--paper-2: #ECE7DA;
	--ink: #24261F;
	--ink-soft: #55584C;
	--ink-faint: #8B8C7E;
	--rule: rgba(36, 38, 31, 0.14);
	--rule-soft: rgba(36, 38, 31, 0.08);
	--green: #234230;
	--green-bright: #3E7A50;
	--flush: #8A3B34; /* pressed-flower red, used for accents only */
	--font-display: 'Spectral', Georgia, serif;
	--font-body: 'Public Sans', system-ui, sans-serif;
	--font-mono: 'Spline Sans Mono', monospace;
	--pane-w: 46vw;
}

* { box-sizing: border-box; }
body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--font-body);
	font-size: 17px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--green); color: var(--paper); }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; line-height: 1.08; margin: 0 0 0.5em; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: clamp(40px, 5vw, 74px); font-weight: 400; }
h2 { font-size: clamp(28px, 3.4vw, 46px); font-weight: 400; }
h3 { font-size: clamp(20px, 2vw, 26px); }
p { margin: 0 0 1.1em; color: var(--ink-soft); }
em, i { font-style: italic; }
.serif { font-family: var(--font-display); }
.mono { font-family: var(--font-mono); }

/* Structural device: roman-numeral plate marks, set in small mono caps */
.plate {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--ink-faint);
	display: inline-flex;
	align-items: center;
	gap: 10px;
}
.plate .pl-no { color: var(--flush); }
.binomial { font-family: var(--font-display); font-style: italic; color: var(--green); }

.eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); }

.link-underline { border-bottom: 1px solid var(--rule); padding-bottom: 2px; transition: border-color 0.25s, color 0.25s; }
.link-underline:hover { border-color: var(--green); color: var(--green); }

.btn {
	display: inline-flex; align-items: center; gap: 10px;
	padding: 12px 24px; border: 1px solid var(--ink); border-radius: 0;
	font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
	color: var(--ink); background: transparent; transition: background 0.25s, color 0.25s; cursor: pointer;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.solid { background: var(--green); border-color: var(--green); color: var(--paper); }
.btn.solid:hover { background: var(--ink); border-color: var(--ink); }

/* Sitewide GPU background: a soft dappled-sunlight caustic shader
   drawn over the paper (body bg), below all content. Deliberately
   light and near-paper in tone — sun through leaves onto an archive
   desk, not a dark full-bleed hero. */
#lightCanvas { position: fixed; inset: 0; z-index: -1; pointer-events: none; width: 100%; height: 100%; }

.paper-grain {
	position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: 0.4; mix-blend-mode: multiply;
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/></svg>");
}

/* ============================================================
   Header — thin, no fixed full-width bar competing with a hero
   ============================================================ */
.site-head { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 22px 0; mix-blend-mode: normal; transition: background 0.3s, border-color 0.3s; border-bottom: 1px solid transparent; }
.site-head.scrolled { background: rgba(244, 241, 232, 0.86); backdrop-filter: blur(8px); border-color: var(--rule); }
.head-inner { display: flex; align-items: center; justify-content: space-between; padding: 0 40px; }
.logo { font-family: var(--font-display); font-size: 24px; font-weight: 500; letter-spacing: 0.02em; display: flex; align-items: baseline; gap: 10px; }
.logo .est { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; color: var(--ink-faint); text-transform: uppercase; }
.main-nav ul { list-style: none; display: flex; gap: 30px; margin: 0; padding: 0; }
.main-nav a { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); }
.main-nav a:hover { color: var(--green); }
.nav-toggle { display: none; background: none; border: 1px solid var(--ink); color: var(--ink); font-size: 11px; letter-spacing: 0.06em; padding: 7px 13px; cursor: pointer; font-family: var(--font-mono); }

.mobile-nav { position: fixed; inset: 0; z-index: 200; background: var(--paper); transform: translateY(-100%); transition: transform 0.4s cubic-bezier(.7,0,.3,1); display: flex; flex-direction: column; }
.mobile-nav.open { transform: translateY(0); }
.mobile-nav ul { list-style: none; margin: auto 0; padding: 0 40px; }
.mobile-nav li { border-bottom: 1px solid var(--rule); }
.mobile-nav a { display: block; padding: 18px 0; font-family: var(--font-display); font-size: 34px; color: var(--ink); }
.mn-close { position: absolute; top: 24px; right: 34px; background: none; border: 1px solid var(--ink); color: var(--ink); font-size: 20px; padding: 4px 13px; cursor: pointer; }
@media (max-width: 900px) { .main-nav { display: none; } .nav-toggle { display: block; } }

/* ============================================================
   THE SPLIT — a sticky visual pane on the left, an editorial
   column that scrolls on the right. This is the theme's spine.
   ============================================================ */
.split { display: grid; grid-template-columns: var(--pane-w) 1fr; align-items: start; }
.split-pane {
	position: sticky; top: 0; height: 100vh; overflow: hidden;
	background: var(--paper-2);
	border-right: 1px solid var(--rule);
}
#plateCanvas { width: 100%; height: 100%; display: block; }
/* caption that sits over the pane, revealed with a clip-path wipe */
.pane-cap {
	position: absolute; left: 34px; bottom: 34px; right: 34px; z-index: 3;
	color: var(--paper); text-shadow: 0 1px 20px rgba(0,0,0,0.4);
}
.pane-cap .pc-binomial { font-family: var(--font-display); font-style: italic; font-size: clamp(22px, 2.4vw, 32px); display: block; }
.pane-cap .pc-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 8px; opacity: 0.85; }
.pane-fallback { position: absolute; inset: 0; }
.pane-fallback img { width: 100%; height: 100%; object-fit: cover; }

.reading { min-height: 100vh; }
.reading-inner { max-width: 620px; padding: 0 clamp(34px, 6vw, 96px); }

/* opening block */
.opening { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding-top: 100px; padding-bottom: 80px; }
.opening .lede { font-family: var(--font-display); font-size: clamp(22px, 2.4vw, 30px); line-height: 1.4; color: var(--ink); margin-top: 24px; }
.opening .lede em { color: var(--green); }
.opening .actions { display: flex; gap: 14px; margin-top: 40px; flex-wrap: wrap; }

/* a numbered specimen entry in the reading column */
.entry { padding: 90px 0; border-top: 1px solid var(--rule); }
.entry:first-of-type { border-top: 0; }
.entry .entry-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 22px; }
.entry h2 { margin: 0; }
.entry .entry-binomial { margin-top: 6px; font-size: 18px; }
.entry .entry-body { margin-top: 20px; }
/* multi-column passage — new to the project */
.entry .cols { column-count: 2; column-gap: 34px; margin-top: 20px; font-size: 15px; }
.entry .cols p { margin-top: 0; }
@media (max-width: 620px) { .entry .cols { column-count: 1; } }
.entry .dropcap::first-letter {
	font-family: var(--font-display); float: left; font-size: 3.4em; line-height: 0.78;
	padding: 6px 10px 0 0; color: var(--green); font-weight: 400;
}
.entry .marginalia {
	font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.03em; color: var(--ink-faint);
	border-left: 1px solid var(--rule); padding-left: 16px; margin: 24px 0;
}
.entry .entry-more { margin-top: 26px; }

/* clip-path reveal utility */
[data-clip] { clip-path: inset(0 100% 0 0); }
[data-clip].shown { clip-path: inset(0 0 0 0); transition: clip-path 1.1s cubic-bezier(.7,0,.2,1); }

/* the growing SVG stem between passages */
.stem-rail { position: absolute; top: 0; left: -1px; width: 40px; height: 100%; pointer-events: none; z-index: 2; }
.stem-rail svg { width: 100%; height: 100%; }
.stem-path { fill: none; stroke: var(--green-bright); stroke-width: 1.4; opacity: 0.5; }

@media (max-width: 900px) {
	.split { grid-template-columns: 1fr; }
	.split-pane { position: relative; height: 62vh; top: auto; border-right: 0; border-bottom: 1px solid var(--rule); }
	.reading-inner { max-width: none; }
	.opening { min-height: auto; padding-top: 120px; }
	.entry { padding: 60px 0; }
	.stem-rail { display: none; }
}

/* ============================================================
   Non-split sections (index, footer, inner pages)
   ============================================================ */
.section { padding: 110px 40px; }
.wrap { max-width: 1180px; margin: 0 auto; }
.wrap-narrow { max-width: 760px; margin: 0 auto; }

/* Archive: a numbered index list, not a card grid */
.index-list { border-top: 1px solid var(--ink); }
.index-row { display: grid; grid-template-columns: 60px 1fr auto; gap: 24px; align-items: baseline; padding: 26px 0; border-bottom: 1px solid var(--rule); transition: padding-left 0.3s, background 0.3s; }
.index-row:hover { padding-left: 16px; background: var(--paper-2); }
.index-row .ir-no { font-family: var(--font-mono); font-size: 12px; color: var(--flush); }
.index-row .ir-name { font-family: var(--font-display); font-size: clamp(22px, 2.4vw, 30px); }
.index-row .ir-binomial { font-family: var(--font-display); font-style: italic; font-size: 15px; color: var(--green); display: block; margin-top: 4px; }
.index-row .ir-fam { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); text-align: right; }
@media (max-width: 640px) { .index-row { grid-template-columns: 40px 1fr; } .index-row .ir-fam { display: none; } }

.family-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.family-filter a { padding: 7px 15px; border: 1px solid var(--rule); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); }
.family-filter a.active, .family-filter a:hover { border-color: var(--green); color: var(--green); }

/* Field notes (journal) — an offset editorial list, not a 3-up card grid */
.notes-list { border-top: 1px solid var(--ink); }
.note-row { display: grid; grid-template-columns: 140px 1fr; gap: 30px; padding: 34px 0; border-bottom: 1px solid var(--rule); }
.note-row .nr-date { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-faint); }
.note-row h3 { font-family: var(--font-display); font-size: clamp(20px, 2.2vw, 28px); font-weight: 400; margin: 0 0 8px; }
.note-row p { font-size: 15px; margin: 0; }
@media (max-width: 640px) { .note-row { grid-template-columns: 1fr; gap: 8px; } }

/* Collection at a glance — inline stat line, not a bordered 4-cell band */
.glance { display: flex; flex-wrap: wrap; gap: 48px; padding: 40px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.glance .g-cell .g-num { font-family: var(--font-display); font-size: clamp(32px, 3.4vw, 46px); color: var(--green); }
.glance .g-cell .g-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-faint); margin-top: 4px; }

/* Pull quote — set in large serif italic, centered, hairline rules */
.pullquote { text-align: center; padding: 80px 0; }
.pullquote blockquote { font-family: var(--font-display); font-style: italic; font-size: clamp(26px, 3.2vw, 40px); line-height: 1.3; max-width: 820px; margin: 0 auto; color: var(--ink); }
.pullquote cite { display: block; font-style: normal; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint); margin-top: 24px; }

/* ============================================================
   Footer
   ============================================================ */
.site-foot { padding: 80px 40px 44px; border-top: 1px solid var(--ink); background: var(--paper-2); position: relative; z-index: 2; }
.foot-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 44px; padding-bottom: 50px; border-bottom: 1px solid var(--rule); }
.foot-brand .logo { margin-bottom: 16px; }
.foot-brand p { max-width: 360px; font-size: 15px; }
.foot-col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 16px; }
.foot-col .foot-menu { list-style: none; margin: 0; padding: 0; }
.foot-col .foot-menu li { margin: 0; }
.foot-col .foot-menu a, .foot-col > a { display: block; padding: 5px 0; color: var(--ink-soft); font-size: 15px; }
.foot-col .foot-menu a:hover, .foot-col > a:hover { color: var(--green); }
.foot-bottom { display: flex; justify-content: space-between; padding-top: 26px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ink-faint); flex-wrap: wrap; gap: 12px; }
@media (max-width: 780px) { .foot-top { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }

/* ============================================================
   Inner pages / single specimen
   ============================================================ */
.page-hero { padding: 180px 40px 60px; border-bottom: 1px solid var(--rule); }
.page-hero .wrap-narrow > .plate { margin-bottom: 22px; }
.specimen-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: 70px 40px; max-width: 1180px; margin: 0 auto; align-items: start; }
.specimen-plate img { width: 100%; border: 1px solid var(--rule); }
.specimen-plate figcaption { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); margin-top: 10px; letter-spacing: 0.03em; }
.specimen-facts { position: sticky; top: 110px; }
.specimen-facts dl { display: grid; grid-template-columns: auto 1fr; gap: 12px 20px; margin: 24px 0 0; border-top: 1px solid var(--rule); padding-top: 20px; }
.specimen-facts dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-faint); }
.specimen-facts dd { margin: 0; font-family: var(--font-display); font-size: 16px; color: var(--ink); }
.specimen-facts dd.bi { font-style: italic; color: var(--green); }
.specimen-body { font-size: 17px; }
.specimen-body p:first-of-type::first-letter { font-family: var(--font-display); float: left; font-size: 3.4em; line-height: 0.78; padding: 6px 10px 0 0; color: var(--green); }
@media (max-width: 860px) { .specimen-layout { grid-template-columns: 1fr; } .specimen-facts { position: static; } }

.simple-page { padding: 180px 40px 120px; }
.contact-form { display: grid; gap: 18px; max-width: 540px; margin-top: 28px; }
.contact-form label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-faint); display: block; margin-bottom: 7px; }
.contact-form input, .contact-form textarea { width: 100%; background: var(--paper); border: 1px solid var(--rule); color: var(--ink); padding: 12px 14px; font-family: var(--font-body); font-size: 15px; }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--green); }

.notfound { padding: 210px 40px; text-align: center; }
.notfound .nf-plate { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--flush); }

/* reveal baseline */
[data-reveal] { opacity: 0; transform: translateY(20px); }
[data-reveal].shown { opacity: 1; transform: none; transition: opacity 0.9s ease, transform 0.9s cubic-bezier(.2,.7,.3,1); }
@media (prefers-reduced-motion: reduce) {
	[data-reveal], [data-clip] { opacity: 1 !important; transform: none !important; clip-path: none !important; }
}

#pre { position: fixed; inset: 0; z-index: 999; background: var(--paper); display: flex; align-items: center; justify-content: center; transition: opacity 0.6s, visibility 0.6s; }
#pre .pre-mark { font-family: var(--font-display); font-style: italic; font-size: 22px; color: var(--green); }
#pre.done { opacity: 0; visibility: hidden; }