/* ============================================================
   PageWeave Design — editorial catalog system
   Fonts: Fraunces (display) · Instrument Sans (body) · Spline Sans Mono (labels/code)
   ============================================================ */

:root {
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "Spline Sans Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --rule: color-mix(in oklab, var(--color-base-content) 13%, transparent);
  --rule-strong: color-mix(in oklab, var(--color-base-content) 24%, transparent);
  --ink-dim: color-mix(in oklab, var(--color-base-content) 72%, var(--color-base-100));
  --ink-faint: color-mix(in oklab, var(--color-base-content) 46%, var(--color-base-100));

  --wrap: 76rem;
  --gutter: clamp(1.1rem, 4vw, 2.5rem);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background:
    radial-gradient(120% 90% at 85% -10%, color-mix(in oklab, var(--color-primary) 7%, transparent), transparent 55%),
    var(--color-base-100);
  color: var(--color-base-content);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--color-primary); color: var(--color-primary-content); }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

* { scrollbar-width: thin; scrollbar-color: var(--color-base-300) transparent; }
*::-webkit-scrollbar { height: 8px; width: 8px; }
*::-webkit-scrollbar-thumb { background: var(--color-base-300); }
*::-webkit-scrollbar-track { background: transparent; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--color-primary); color: var(--color-primary-content);
  padding: .5rem 1rem; font-family: var(--font-mono); font-size: .75rem;
}
.skip-link:focus { left: 0; }

/* ---------- layout ---------- */

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

.section-edge { border-top: 1px solid var(--rule); }

.stack > * + * { margin-top: 1em; }

/* ---------- typography ---------- */

.display {
  font-family: var(--font-display);
  font-weight: 420;
  letter-spacing: -0.015em;
  line-height: 1.04;
  font-variation-settings: "opsz" 100;
}
.display em {
  font-style: italic;
  font-weight: 380;
  color: var(--color-secondary);
}

.display-xl { font-size: clamp(2.6rem, 6.4vw, 4.6rem); }
.display-lg { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
.display-md { font-size: clamp(1.6rem, 3vw, 2.3rem); }
.display-sm { font-size: clamp(1.25rem, 2vw, 1.6rem); }

.kicker {
  display: inline-flex; align-items: baseline; gap: .6em;
  font-family: var(--font-mono);
  font-size: .72rem; font-weight: 500;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-dim);
}
.kicker .k-num { color: var(--color-primary); }
.kicker::after {
  content: ""; align-self: center;
  width: 2.4rem; height: 1px; background: var(--rule-strong);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint);
}

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.65;
  color: var(--ink-dim);
  max-width: 42rem;
}

/* ---------- header ---------- */

.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-base-100) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.head-row {
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 3.9rem;
}
.wordmark {
  font-family: var(--font-display);
  font-size: 1.22rem; font-weight: 480; letter-spacing: -0.01em;
  color: var(--color-base-content); text-decoration: none;
  white-space: nowrap;
  display: inline-flex; align-items: baseline;
}
.wordmark .wm-sub {
  font-family: var(--font-mono);
  font-size: .78rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: var(--color-primary);
  margin-left: .45em;
}
.wm-sep { color: var(--ink-faint); margin-left: .45em; font-weight: 300; }

.head-nav { display: flex; gap: 1.35rem; margin-inline: auto; }
.head-nav a {
  font-size: .86rem; font-weight: 500;
  color: var(--ink-dim); text-decoration: none;
  padding-block: .35rem;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.head-nav a:hover, .head-nav a.is-active {
  color: var(--color-base-content);
  border-bottom-color: var(--color-primary);
}

.head-actions { display: flex; align-items: center; gap: 1rem; margin-left: auto; }
.head-md {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em;
  color: var(--ink-faint); text-decoration: none;
}
.head-md:hover { color: var(--color-accent); }

.menu-dd { position: relative; display: none; }
.menu-dd summary {
  list-style: none; cursor: pointer;
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em; text-transform: uppercase;
  border: 1px solid var(--rule-strong); padding: .45rem .8rem;
  user-select: none;
}
.menu-dd summary::-webkit-details-marker { display: none; }
.menu-dd[open] summary { border-color: var(--color-primary); color: var(--color-primary); }
.menu-dd-panel {
  position: absolute; right: 0; top: calc(100% + .5rem);
  min-width: 11rem; z-index: 60;
  background: var(--color-base-200);
  border: 1px solid var(--rule-strong);
  box-shadow: 0 18px 40px rgb(0 0 0 / .45);
}
.menu-dd-panel a {
  display: block; padding: .6rem 1rem;
  font-size: .88rem; color: var(--ink-dim); text-decoration: none;
}
.menu-dd-panel a:hover { background: var(--color-base-300); color: var(--color-base-content); }

@media (max-width: 64rem) {
  .head-nav, .head-md { display: none; }
  .menu-dd { display: block; margin-left: auto; }
  .head-actions { margin-left: 0; }
}

/* ---------- buttons ---------- */

.btn-ed {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  font-family: var(--font-mono);
  font-size: .78rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
  padding: .62rem 1.15rem;
  border: 1px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease, transform .15s ease;
}
.btn-ed:active { transform: translateY(1px); }

.btn-ed-primary {
  background: var(--color-primary); color: var(--color-primary-content);
  border-color: var(--color-primary);
}
.btn-ed-primary:hover { background: color-mix(in oklab, var(--color-primary) 86%, white); }

.btn-ed-ghost {
  background: transparent; color: var(--color-base-content);
  border-color: var(--rule-strong);
}
.btn-ed-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-ed-sm { padding: .4rem .75rem; font-size: .7rem; }

/* ---------- section headers ---------- */

.sec-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
  padding-block: 1.1rem 1.6rem;
}
.sec-head h2 { margin: 0; }
.sec-count {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em;
  color: var(--ink-faint);
  border: 1px solid var(--rule); padding: .28rem .6rem;
}

/* ---------- specimen cards & grids ---------- */

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(17.5rem, 100%), 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.spec-card {
  display: flex; flex-direction: column; gap: .7rem;
  background: var(--color-base-100);
  padding: 1.35rem 1.3rem 1.2rem;
  text-decoration: none; color: inherit;
  position: relative;
  transition: background .18s ease;
}
.spec-card:hover { background: var(--color-base-200); }
.spec-card::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 2px;
  background: var(--color-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform .22s ease;
}
.spec-card:hover::after { transform: scaleX(1); }

.spec-top {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint);
}
.spec-top .spec-num { color: var(--ink-faint); transition: color .18s ease; }
.spec-card:hover .spec-num { color: var(--color-primary); }

.spec-title {
  font-family: var(--font-display);
  font-size: 1.32rem; font-weight: 480; letter-spacing: -0.01em;
  margin: 0; line-height: 1.15;
}
.spec-desc {
  font-size: .87rem; line-height: 1.55; color: var(--ink-dim);
  margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.spec-foot {
  margin-top: auto; padding-top: .8rem;
  display: flex; align-items: center; justify-content: space-between; gap: .8rem;
}

.md-chip {
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .08em;
  color: var(--ink-faint);
  border: 1px solid var(--rule); padding: .16rem .42rem;
  white-space: nowrap;
}
a.md-chip { text-decoration: none; transition: color .15s ease, border-color .15s ease; }
a.md-chip:hover { color: var(--color-accent); border-color: var(--color-accent); }

.is-hidden { display: none !important; }

/* ---------- swatches ---------- */

.swatch-strip { display: flex; }
.swatch {
  width: 1.35rem; height: 1.35rem;
  border: 1px solid rgb(0 0 0 / .25);
  margin-left: -1px;
}
.swatch:first-child { margin-left: 0; }

.font-specimen { line-height: 1.1; }
.font-specimen .fs-a { font-family: var(--font-display); font-size: 1.5rem; }
.font-specimen .fs-b { font-family: var(--font-body); font-size: .95rem; color: var(--ink-dim); }
.font-specimen .fs-c { font-family: var(--font-mono); font-size: .72rem; color: var(--color-accent); }

/* ---------- rails (landing) ---------- */

.rail-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-block: 1.2rem .9rem;
}
.rail-head h3 {
  font-family: var(--font-display); font-weight: 480;
  font-size: 1.35rem; margin: 0;
}
.rail {
  display: grid; grid-auto-flow: column; grid-auto-columns: min(19rem, 78vw);
  gap: 1px; overflow-x: auto;
  background: var(--rule); border-block: 1px solid var(--rule);
  scroll-snap-type: x mandatory;
  padding-inline: var(--gutter);
  margin-inline: calc(var(--gutter) * -1);
}
.rail > * { scroll-snap-align: start; background: var(--color-base-100); }

/* ---------- filter chips ---------- */

.chipbar {
  display: flex; flex-wrap: wrap; gap: .5rem;
  padding-block: .4rem 1.4rem;
}
.chip {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em;
  color: var(--ink-dim);
  background: transparent;
  border: 1px solid var(--rule-strong);
  padding: .34rem .7rem;
  cursor: pointer;
  transition: all .15s ease;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.chip[aria-pressed="true"] {
  background: var(--color-primary); border-color: var(--color-primary);
  color: var(--color-primary-content);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .06em;
  color: var(--ink-dim);
  border: 1px solid var(--rule);
  padding: .14rem .45rem;
  border-radius: 2px;
}

/* ---------- item layout (detail pages) ---------- */

.lib-layout {
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-block: 2rem 4rem;
}
.lib-nav { position: sticky; top: 4.6rem; align-self: start; }
.lib-nav-label {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 .6rem;
}
.lib-nav ul { list-style: none; margin: 0 0 1.4rem; padding: 0; }
.lib-nav li a {
  display: block;
  font-size: .85rem; color: var(--ink-dim); text-decoration: none;
  padding: .3rem 0 .3rem .75rem;
  border-left: 1px solid var(--rule);
  transition: color .15s ease, border-color .15s ease;
}
.lib-nav li a:hover { color: var(--color-base-content); }
.lib-nav li a.is-active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.lib-main { min-width: 0; }
.lib-crumb {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em;
  color: var(--ink-faint); text-transform: uppercase;
  display: flex; gap: .5em; flex-wrap: wrap;
}
.lib-crumb a { color: var(--ink-faint); text-decoration: none; }
.lib-crumb a:hover { color: var(--color-accent); }

.item-head { padding-block: .9rem 1.6rem; border-bottom: 1px solid var(--rule); }
.item-head h1 { margin: .5rem 0 .6rem; }
.item-meta {
  display: flex; flex-wrap: wrap; gap: .5rem .6rem; align-items: center;
}

@media (max-width: 56rem) {
  .lib-layout { grid-template-columns: 1fr; }
  .lib-nav { position: static; order: 2; }
}

/* ---------- preview frame ---------- */

.preview-frame {
  border: 1px solid var(--rule-strong);
  background:
    repeating-conic-gradient(color-mix(in oklab, var(--color-base-content) 4%, transparent) 0% 25%, transparent 0% 50%) 0 0 / 18px 18px,
    var(--color-base-200);
}
.preview-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: .45rem .8rem;
  border-bottom: 1px solid var(--rule-strong);
  background: var(--color-base-100);
}
.preview-body { padding: clamp(1rem, 3vw, 2rem); overflow-x: auto; }

/* ---------- code blocks ---------- */

.codeblock { position: relative; margin-block: 1.2rem; }
.codeblock pre { margin: 0; }
.copy-btn {
  position: absolute; top: .5rem; right: .5rem;
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-dim);
  background: var(--color-base-300);
  border: 1px solid var(--rule-strong);
  padding: .28rem .6rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s ease, color .15s ease, border-color .15s ease;
}
.codeblock:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--color-base-content); border-color: var(--color-base-content); }
.copy-btn.ok { color: var(--color-success); border-color: var(--color-success); opacity: 1; }

/* ---------- prose (markdownify output) ---------- */

.prose { font-size: .98rem; line-height: 1.72; color: var(--color-base-content); }
.prose > * + * { margin-top: 1.1em; }

.prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  font-weight: 500; letter-spacing: -0.01em;
  line-height: 1.2;
  margin-top: 2.2em;
  scroll-margin-top: 5.5rem;
}
.prose h2 { font-size: 1.65rem; padding-top: .35em; border-top: 1px solid var(--rule); }
.prose h3 { font-size: 1.28rem; }
.prose h4 { font-size: 1.05rem; font-family: var(--font-body); font-weight: 650; }

.prose p { margin: 0; }
.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--color-primary) 45%, transparent);
  text-underline-offset: 3px;
}
.prose a:hover { text-decoration-color: currentColor; }

.prose strong { font-weight: 650; color: var(--color-base-content); }
.prose em { color: var(--color-secondary); }

.prose ul, .prose ol { padding-left: 1.35rem; display: grid; gap: .35em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li::marker { color: var(--color-primary); }

.prose blockquote {
  border-left: 2px solid var(--color-primary);
  padding: .2rem 0 .2rem 1.1rem;
  color: var(--ink-dim);
  font-style: italic;
}
.prose blockquote p { margin: 0; }

.prose hr { border: 0; border-top: 1px solid var(--rule); margin-block: 2.2em; }

.prose code {
  font-family: var(--font-mono);
  font-size: .84em;
  background: var(--color-base-200);
  border: 1px solid var(--rule);
  padding: .08em .38em;
  border-radius: 2px;
}
.prose pre {
  background: var(--color-base-200);
  border: 1px solid var(--rule-strong);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: .82rem; line-height: 1.6;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; }

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
.prose th {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-faint); font-weight: 500;
  text-align: left;
  border-bottom: 1px solid var(--rule-strong);
  padding: .5rem .75rem .5rem 0;
}
.prose td {
  border-bottom: 1px solid var(--rule);
  padding: .55rem .75rem .55rem 0;
  vertical-align: top;
}

.prose img { max-width: 100%; height: auto; }

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  background: linear-gradient(to bottom, transparent, color-mix(in oklab, var(--color-primary) 3%, transparent));
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-block: 3rem 2.5rem;
}
.foot-brand p { font-size: .86rem; color: var(--ink-dim); max-width: 20rem; margin: .8rem 0 0; }
.foot-col-title {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 .9rem;
}
.foot-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.foot-col a {
  font-size: .86rem; color: var(--ink-dim); text-decoration: none;
}
.foot-col a:hover { color: var(--color-primary); }
.foot-base {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between;
  border-top: 1px solid var(--rule);
  padding-block: 1.1rem;
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .06em;
  color: var(--ink-faint);
}
.foot-base a { color: var(--ink-faint); }
.foot-base a:hover { color: var(--color-accent); }

@media (max-width: 56rem) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 36rem) {
  .foot-grid { grid-template-columns: 1fr; }
}

/* ---------- reveal animation ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s cubic-bezier(.2,.7,.2,1), transform .6s cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}