/* ============================================================
   Adinkra Stool Studio — main.css
   Studio grey stage, walnut range, ember accent. The UI stays
   nearly invisible so the object carries the colour.
   ============================================================ */

@font-face {
  font-family: 'Sora';
  src: url('../fonts/sora-var.woff2') format('woff2');
  font-weight: 300 800;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-var.woff2') format('woff2');
  font-weight: 300 700;
  font-display: swap;
}

:root {
  --paper: #ECEAE6;
  --paper-deep: #E3E0DA;
  --ink: #211A14;
  --muted: #6F6459;
  --line: rgba(33, 26, 20, 0.14);
  --line-soft: rgba(33, 26, 20, 0.08);
  --accent: #C2571B;
  --accent-deep: #9C4413;
  --walnut: #5C4033;
  --ebony: #2A211C;
  --natural: #C9A87A;
  --sora: 'Sora', system-ui, sans-serif;
  --inter: 'Inter', system-ui, sans-serif;
  --space: clamp(4.5rem, 10vw, 8.5rem);
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--inter);
  font-weight: 400;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

body::-webkit-scrollbar { width: 10px; }
body::-webkit-scrollbar-track { background: var(--paper-deep); }
body::-webkit-scrollbar-thumb { background: #B9AEA2; border-radius: 5px; border: 2px solid var(--paper-deep); }

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 200;
  background: var(--ink); color: var(--paper);
  padding: 0.6rem 1.1rem; border-radius: 4px;
  font: 600 0.8rem var(--sora); text-decoration: none;
  transition: top 150ms ease;
}
.skip-link:focus { top: 1rem; }

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

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem var(--gutter);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.wordmark {
  font: 600 0.95rem/1.2 var(--sora);
  letter-spacing: 0.01em;
  color: var(--ink); text-decoration: none;
  display: flex; align-items: center; gap: 0.6rem;
}
.wordmark svg { display: block; }
.wordmark span em { font-style: normal; color: var(--muted); font-weight: 400; }

.site-nav { display: flex; gap: clamp(0.9rem, 2.5vw, 1.8rem); }
.site-nav a {
  font: 500 0.72rem var(--inter);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

@media (max-width: 720px) {
  .site-nav a:nth-child(-n+2) { display: none; }
}

/* ---------- configurator hero ---------- */

.configurator {
  display: grid;
  grid-template-columns: 1fr minmax(340px, 420px);
  min-height: 100vh;
  min-height: 100svh;
  border-bottom: 1px solid var(--line);
}

.viewport {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 30%, #F2F0EC 0%, var(--paper) 55%, #E2DFD8 100%);
  min-height: 60vh;
}
.viewport canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: pan-y;
  cursor: grab;
}
.viewport canvas.dragging { cursor: grabbing; }

.viewport-hint {
  position: absolute; left: 50%; bottom: 1.1rem; transform: translateX(-50%);
  font: 500 0.68rem var(--inter); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); pointer-events: none;
  display: flex; align-items: center; gap: 0.5rem;
  opacity: 1; transition: opacity 600ms ease;
}
.viewport-hint.faded { opacity: 0; }

.viewport-title {
  position: absolute; top: calc(3.4rem + clamp(0.8rem, 3vh, 2.2rem)); left: var(--gutter); right: 1rem;
  pointer-events: none;
}
.viewport-title h1 {
  font: 300 clamp(1.6rem, 3.2vw, 2.6rem)/1.15 var(--sora);
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.viewport-title h1 strong { font-weight: 700; }
.viewport-title p {
  margin-top: 0.5rem;
  font: 400 0.85rem var(--inter); color: var(--muted);
  max-width: 34ch;
}

/* SVG fallback when WebGL is unavailable */
.fallback { position: absolute; inset: 0; display: none; align-items: center; justify-content: center; padding: 5rem 2rem 3rem; }
.viewport.no-webgl .fallback { display: flex; }
.viewport.no-webgl canvas, .viewport.no-webgl .viewport-hint { display: none; }
.fallback svg { width: min(100%, 420px); height: auto; }
.fallback figcaption {
  position: absolute; bottom: 1rem; left: 50%; transform: translateX(-50%);
  font: 500 0.7rem var(--inter); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
  white-space: nowrap;
}

/* ---------- spec panel ---------- */

.spec-panel {
  border-left: 1px solid var(--line);
  padding: calc(3.4rem + clamp(0.8rem, 3vh, 2rem)) clamp(1.4rem, 2.5vw, 2.4rem) 1.6rem;
  display: flex; flex-direction: column; gap: 1.5rem;
  background: var(--paper);
}

.spec-group legend, .spec-label {
  font: 600 0.68rem var(--inter);
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.7rem;
  display: block;
}
.spec-group { border: 0; }
.spec-group legend { padding: 0; }

.chip-row { display: flex; gap: 0.6rem; flex-wrap: wrap; }

.chip {
  position: relative; display: flex; align-items: center; gap: 0.55rem;
  padding: 0.45rem 0.8rem 0.45rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
  font: 500 0.8rem var(--inter);
}
.chip input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chip:hover { border-color: var(--ink); }
.chip:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.chip:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 3px; }

.swatch {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid rgba(33,26,20,0.25);
  flex: none;
}
.swatch.walnut { background: linear-gradient(135deg, #6E4C3B 0%, #573C2D 45%, #6A4938 60%, #4E362A 100%); }
.swatch.ebony { background: linear-gradient(135deg, #3A2E26 0%, #241C17 50%, #352A22 70%, #1E1713 100%); }
.swatch.natural { background: linear-gradient(135deg, #D8B98D 0%, #C4A170 45%, #D2B183 65%, #B99764 100%); }

.chip canvas.motif-chip { width: 26px; height: 26px; flex: none; }

.size-chip { padding: 0.45rem 0.9rem; flex-direction: column; align-items: flex-start; gap: 0.1rem; border-radius: 10px; }
.size-chip small { font: 400 0.68rem var(--inter); color: var(--muted); letter-spacing: 0.02em; }

/* dimensions readout */
.dims {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.dims div { padding: 0.7rem 0.2rem; }
.dims div + div { border-left: 1px solid var(--line-soft); padding-left: 0.9rem; }
.dims dt { font: 500 0.62rem var(--inter); letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.dims dd { font: 600 1.05rem var(--sora); margin-top: 0.15rem; font-variant-numeric: tabular-nums; }
.dims dd span { font: 500 0.7rem var(--inter); color: var(--muted); }

/* price + actions */
.price-row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.price {
  font: 700 clamp(1.9rem, 3vw, 2.4rem)/1 var(--sora);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.price .cedi { font-weight: 400; font-size: 0.62em; color: var(--muted); margin-right: 0.15em; }
.config-code {
  font: 500 0.7rem var(--inter); letter-spacing: 0.14em;
  color: var(--muted); text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; margin-top: auto; }
.btn {
  font: 600 0.8rem var(--sora); letter-spacing: 0.04em;
  padding: 0.85rem 1rem; border-radius: 6px;
  border: 1px solid var(--ink);
  background: transparent; color: var(--ink);
  cursor: pointer; text-align: center; text-decoration: none;
  transition: background 150ms ease, color 150ms ease, border-color 150ms ease, transform 150ms ease;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn svg { flex: none; }

.spec-note { font: 400 0.72rem var(--inter); color: var(--muted); }
.spec-note a { color: var(--accent-deep); }

@media (max-width: 960px) {
  .configurator { grid-template-columns: 1fr; }
  .viewport { min-height: 58svh; border-bottom: 1px solid var(--line); }
  .spec-panel { border-left: 0; padding-top: 1.6rem; }
  .actions { margin-top: 0.4rem; }
  .viewport-title { top: 4.2rem; }
}

/* ---------- shared section shell ---------- */

.section { padding: var(--space) var(--gutter); }
.section-inner { max-width: 1120px; margin: 0 auto; }
.section.alt { background: var(--paper-deep); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }

.kicker {
  font: 600 0.7rem var(--inter);
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent-deep);
  display: flex; align-items: center; gap: 0.8rem;
  margin-bottom: 1.2rem;
}
.kicker::before { content: ''; width: 2.2rem; height: 1px; background: var(--accent); }

.section h2 {
  font: 300 clamp(1.7rem, 3.6vw, 2.7rem)/1.18 var(--sora);
  letter-spacing: -0.02em;
  max-width: 22ch;
  margin-bottom: 1.6rem;
}
.section h2 strong { font-weight: 700; }

.lede { font-size: clamp(1rem, 1.4vw, 1.15rem); max-width: 58ch; color: var(--ink); }
.body-copy { color: var(--muted); max-width: 58ch; margin-top: 1rem; }
.body-copy strong { color: var(--ink); font-weight: 600; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }

/* respectful adaptation note */
.respect-note {
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  padding: 1.4rem 1.6rem;
  border-radius: 0 8px 8px 0;
  margin-top: 1.8rem;
}
.respect-note h3 { font: 600 0.95rem var(--sora); margin-bottom: 0.5rem; }
.respect-note p { font-size: 0.9rem; color: var(--muted); }
.respect-note p + p { margin-top: 0.6rem; }

/* motif meaning cards */
.motif-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-top: 2.4rem; }
@media (max-width: 820px) { .motif-cards { grid-template-columns: 1fr; } }
.motif-card { background: var(--paper); padding: 1.8rem 1.6rem; transition: background 200ms ease; }
.motif-card:hover { background: #F4F2EE; }
.motif-card svg, .motif-card canvas { width: 64px; height: 64px; display: block; margin-bottom: 1.1rem; }
.motif-card h3 { font: 600 1.05rem var(--sora); }
.motif-card .twi { font: 400 0.78rem var(--inter); color: var(--accent-deep); letter-spacing: 0.06em; margin-bottom: 0.6rem; }
.motif-card p { font-size: 0.88rem; color: var(--muted); }

/* materials */
.material-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; margin-top: 2.4rem; }
@media (max-width: 820px) { .material-cards { grid-template-columns: 1fr; } }
.material-card { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--paper); transition: transform 200ms ease, box-shadow 200ms ease; }
@media (pointer: fine) {
  .material-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -20px rgba(33,26,20,0.35); }
}
.material-slab { height: 150px; position: relative; }
.material-slab::after {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(94deg, transparent 0 7px, rgba(255,255,255,0.05) 7px 9px, transparent 9px 16px, rgba(0,0,0,0.08) 16px 17.5px);
  mix-blend-mode: overlay;
}
.material-slab.walnut { background: linear-gradient(100deg, #6E4C3B, #4E362A 40%, #6A4938 62%, #45301F); }
.material-slab.ebony { background: linear-gradient(100deg, #382C24, #1E1713 45%, #32271F 66%, #191310); }
.material-slab.natural { background: linear-gradient(100deg, #D8B98D, #B99764 42%, #D2B183 64%, #AE8C5B); }
.material-card .material-meta { padding: 1.3rem 1.4rem 1.5rem; }
.material-card h3 { font: 600 1.05rem var(--sora); display: flex; justify-content: space-between; align-items: baseline; }
.material-card h3 span { font: 500 0.78rem var(--inter); color: var(--accent-deep); font-variant-numeric: tabular-nums; }
.material-card p { font-size: 0.88rem; color: var(--muted); margin-top: 0.5rem; }

/* ordering steps */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; margin-top: 2.4rem; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { counter-increment: step; border-top: 1px solid var(--ink); padding-top: 1.1rem; }
.step::before {
  content: counter(step, decimal-leading-zero);
  font: 300 2rem/1 var(--sora); color: var(--accent);
  display: block; margin-bottom: 0.7rem;
}
.step h3 { font: 600 0.98rem var(--sora); margin-bottom: 0.4rem; }
.step p { font-size: 0.86rem; color: var(--muted); }

.concept-disclaimer {
  margin-top: 2.6rem; padding: 1.1rem 1.4rem;
  border: 1px dashed var(--line);
  border-radius: 8px;
  font: 400 0.8rem var(--inter); color: var(--muted);
  max-width: 62ch;
}

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

.site-footer {
  background: var(--ink); color: #CFC7BD;
  padding: clamp(3rem, 7vw, 5rem) var(--gutter) 2rem;
}
.site-footer .foot-grid {
  max-width: 1120px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2.5rem;
}
@media (max-width: 820px) { .site-footer .foot-grid { grid-template-columns: 1fr; } }
.site-footer h2 { font: 300 clamp(1.4rem, 2.6vw, 2rem)/1.25 var(--sora); color: #F3F0EA; letter-spacing: -0.01em; max-width: 20ch; }
.site-footer h2 strong { font-weight: 700; }
.foot-label { font: 600 0.66rem var(--inter); letter-spacing: 0.2em; text-transform: uppercase; color: #8E8478; margin-bottom: 0.9rem; }
.site-footer ul { list-style: none; display: grid; gap: 0.45rem; }
.site-footer a { color: #CFC7BD; text-decoration: none; font-size: 0.88rem; border-bottom: 1px solid transparent; transition: color 150ms ease, border-color 150ms ease; }
.site-footer a:hover { color: #fff; border-bottom-color: var(--accent); }
.foot-credit {
  max-width: 1120px; margin: 3rem auto 0; padding-top: 1.4rem;
  border-top: 1px solid rgba(243,240,234,0.12);
  font-size: 0.8rem; color: #8E8478;
  display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; justify-content: space-between;
}
.foot-credit a { color: #CFC7BD; }

/* ---------- reveal on scroll ---------- */

.reveal { opacity: 0; transform: translateY(22px); transition: opacity 650ms ease, transform 650ms cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ============================================================
   /guide and /process shared article shell
   ============================================================ */

.article-hero { padding: calc(var(--space) + 3rem) var(--gutter) calc(var(--space) * 0.5); }
.article-hero .section-inner > p { margin-top: 1.2rem; }
.article { padding: 0 var(--gutter) var(--space); }
.article .section-inner { max-width: 760px; }
.article-hero .section-inner { max-width: 760px; }

.article h2 { font: 600 clamp(1.3rem, 2.4vw, 1.7rem)/1.25 var(--sora); letter-spacing: -0.01em; margin: 3rem 0 1rem; max-width: none; }
.article h3 { font: 600 1.05rem var(--sora); margin: 2rem 0 0.6rem; }
.article p { color: #4A4239; margin-bottom: 1rem; max-width: 68ch; }
.article ul, .article ol { margin: 0 0 1.2rem 1.2rem; color: #4A4239; }
.article li { margin-bottom: 0.45rem; max-width: 64ch; }
.article li::marker { color: var(--accent); }
.article strong { color: var(--ink); }
.article a { color: var(--accent-deep); text-underline-offset: 3px; }
.article hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

.article pre {
  background: var(--ink); color: #E8E2D8;
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  font: 400 0.78rem/1.65 ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  margin: 1.2rem 0 1.6rem;
}
.article pre .c { color: #8E8478; } /* comment */
.article pre .k { color: #E7A277; } /* keyword */
.article pre .s { color: #B5C98F; } /* string */
.article code:not(pre code) {
  background: rgba(33,26,20,0.07);
  padding: 0.1em 0.35em; border-radius: 4px;
  font: 400 0.86em ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

.article table { border-collapse: collapse; width: 100%; margin: 1.2rem 0 1.6rem; font-size: 0.88rem; }
.article th, .article td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--line); }
.article th { font: 600 0.68rem var(--inter); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

.pass-log { border: 1px solid var(--line); border-radius: 10px; padding: 1.4rem 1.6rem; margin: 1.2rem 0 1.6rem; background: #F2F0EC; }
.pass-log h3 { margin-top: 0; }
.pass-log ul { margin-bottom: 0; }

.breadcrumb { font: 500 0.72rem var(--inter); letter-spacing: 0.14em; text-transform: uppercase; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-deep); }
.breadcrumb span { color: var(--accent-deep); }