/* ==========================================================================
   NVIL Shift — interactive design system experiment (EXP-003)
   Two worlds on one page. Everything under .sh is NVIL: dark, red, mono
   labels, the cut corners. Everything under .demo belongs to whichever
   design system is selected: the demo reads its own --d-* tokens and
   data-* layout variants and nothing of NVIL leaks in.
   ========================================================================== */

/* ---------- the page: header becomes a Lab mode bar, like Blueprint ---------- */
body.shift-page .header { position: relative; transform: none; }
body.shift-page .header:not(.header--menu-open) { background: var(--bg); }
body.shift-page .header--hidden { transform: none; pointer-events: auto; }
body.shift-page .header--scrolled { backdrop-filter: none; -webkit-backdrop-filter: none; box-shadow: 0 1px 0 var(--line); }
body.shift-page .nav { padding-block: .55rem; }
body.shift-page .nav__menu, body.shift-page .nav__toggle { display: none; }
body.shift-page .nav__brand img { width: 84px; }
body.shift-page .footer { position: relative; z-index: 1; }
.sh-modebar { display: flex; align-items: center; gap: .9rem; font: 600 .66rem/1 var(--font-mono, ui-monospace, Menlo, monospace); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); }
.sh-modebar__label { color: var(--ink); }
.sh-modebar__exp { margin-left: .5rem; padding: .32rem .5rem; border: 1px solid var(--line); color: var(--accent-text); }
.sh-modebar__exit { color: var(--ink-soft); text-decoration: none; padding: .34rem .55rem; border: 1px solid transparent; transition: color .2s ease, border-color .2s ease; }
.sh-modebar__exit:hover { color: var(--accent-text); border-color: var(--line); }
@media (max-width: 640px) { .sh-modebar__exp { display: none; } }

/* ---------- NVIL side ---------- */
.sh {
  --sh-bg: #0D0D0D; --sh-panel: #101013; --sh-raised: #141519; --sh-line: #2B2E33; --sh-line-soft: rgba(244,244,245,.1);
  --sh-ink: #F4F4F5; --sh-soft: #A6A9AF; --sh-dim: #80848C; --sh-red: #E90012; --sh-red-text: #FF2A3C;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sh-cut: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  color-scheme: dark; position: relative; background: var(--sh-bg); color: var(--sh-ink); font-family: var(--font-body); -webkit-font-smoothing: antialiased;
  min-height: calc(100vh - var(--sh-head, 46px));
}
.sh *, .sh *::before, .sh *::after { box-sizing: border-box; }
.sh :where(button) { font: inherit; color: inherit; }
.sh :focus-visible { outline: 2px solid var(--sh-red); outline-offset: 2px; }
.sh-stage { transition: opacity .18s ease; }
.sh-stage.is-out { opacity: 0; }
.sh-mono { font: 500 .68rem/1.5 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--sh-soft); margin: 0; }
.sh-mono--dim { color: var(--sh-dim); }
.sh-mono--kicker { display: flex; align-items: center; gap: .55rem; flex-wrap: wrap; }
.sh-mono__tag { margin-left: .4rem; padding: .22rem .5rem; border: 1px solid var(--sh-line); color: var(--sh-dim); font-size: .6rem; }
.sh-tri { width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 8px solid var(--sh-red); display: inline-block; }
.sh-cta { display: inline-flex; align-items: center; font-size: 1rem; padding: 1rem 1.7rem; }
.sh-cta__arrow { display: inline-block; margin-left: .6rem; transition: transform .2s var(--ease-out); }
.sh-cta:hover .sh-cta__arrow { transform: translateX(4px); }
.sh-textbtn { background: none; border: 0; padding: .4rem 0; cursor: pointer; color: var(--sh-soft); font: 600 .74rem/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; text-decoration: none; display: inline-flex; align-items: center; transition: color .2s ease; }
.sh-textbtn:hover { color: var(--sh-ink); }
.sh-hint { margin: .6rem 0 0; color: var(--sh-dim); font-size: .8rem; line-height: 1.5; }

/* static fallback */
.sh-static { padding: clamp(3rem, 7vw, 5.5rem) 0 4rem; }
.sh-static h1 { margin: .8rem 0 1rem; font: 800 clamp(2rem, 4.5vw, 3.2rem)/1.05 var(--font-display); letter-spacing: -.02em; }
.sh-static__lead { max-width: 44rem; color: var(--sh-soft); font-size: 1.05rem; line-height: 1.65; margin: 0 0 1rem; }
.sh-static__note { margin: 1.4rem 0 0; color: var(--sh-soft); }
.sh-static__note a { color: var(--sh-ink); text-decoration-color: var(--sh-red); text-underline-offset: 3px; }

/* ---------- intro ---------- */
.sh-intro {
  min-height: calc(100vh - var(--sh-head, 46px)); display: flex; flex-direction: column; justify-content: center;
  padding: clamp(3rem, 8vw, 6rem) clamp(1.25rem, 6vw, 5rem);
  background-image: radial-gradient(rgba(244,244,245,.07) 1px, transparent 1px); background-size: 28px 28px;
  position: relative; overflow: hidden;
}
.sh-intro::before { content: ""; position: absolute; inset: auto -10% -30% auto; width: 60vw; height: 60vw; max-width: 720px; max-height: 720px; background: radial-gradient(circle, rgba(233,0,18,.18), transparent 60%); pointer-events: none; }
.sh-intro > * { position: relative; }
.sh-intro__title { margin: 1.4rem 0 1.2rem; font: 800 clamp(2.8rem, 8.5vw, 7rem)/.98 var(--font-display); letter-spacing: -.035em; text-transform: uppercase; max-width: 14ch; }
.sh-intro__line { display: flex; gap: 1.4rem; flex-wrap: wrap; margin: 0 0 1rem; font: 600 .82rem/1 var(--font-mono); letter-spacing: .2em; color: var(--sh-ink); }
.sh-intro__line span:last-child { color: var(--sh-red-text); }
.sh-intro__sub { max-width: 34rem; color: var(--sh-soft); font-size: 1.05rem; line-height: 1.65; margin: 0 0 2rem; }
.sh-intro__actions { margin-bottom: 3rem; }
.sh-intro__strip { display: flex; flex-wrap: wrap; gap: .5rem .9rem; margin-bottom: 1.2rem; font: 500 .62rem/1 var(--font-mono); letter-spacing: .16em; color: var(--sh-dim); }
.sh-intro__strip span { padding: .35rem .55rem; border: 1px solid var(--sh-line); animation: sh-strip 9s linear infinite; animation-delay: calc(var(--k, 0) * 1.5s); }
.sh-intro__strip span:nth-child(1) { --k: 0; } .sh-intro__strip span:nth-child(2) { --k: 1; } .sh-intro__strip span:nth-child(3) { --k: 2; }
.sh-intro__strip span:nth-child(4) { --k: 3; } .sh-intro__strip span:nth-child(5) { --k: 4; } .sh-intro__strip span:nth-child(6) { --k: 5; }
@keyframes sh-strip { 0%, 12%, 100% { color: var(--sh-dim); border-color: var(--sh-line); } 4%, 8% { color: var(--sh-ink); border-color: var(--sh-red); } }
.sh-intro__note { margin-top: .4rem; }

/* ---------- workspace ---------- */
.sh-work {
  display: grid; grid-template-columns: 296px minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr);
  grid-template-areas: "rail canvas" "panel canvas";
  gap: 0; height: calc(100vh - var(--sh-head, 46px)); min-height: 560px;
}
.sh-rail { grid-area: rail; padding: 1.1rem 1.3rem .9rem; border-right: 1px solid var(--sh-line); background: var(--sh-panel); }
.sh-tools { margin-top: .9rem; }
.sh-tool--readout, .sh-sheet__head { display: none; }
.sh-panel { grid-area: panel; min-height: 0; overflow-y: auto; scrollbar-width: thin; padding: .2rem 1.3rem 5.5rem; border-right: 1px solid var(--sh-line); background: var(--sh-panel); display: grid; gap: 1.1rem; align-content: start; }
.sh-canvas { grid-area: canvas; min-height: 0; padding: 1.2rem; display: flex; flex-direction: column; min-width: 0; background: var(--sh-bg); background-image: radial-gradient(rgba(244,244,245,.06) 1px, transparent 1px); background-size: 24px 24px; }
.sh-rail__head { margin-bottom: .9rem; }
.sh-current { margin: 0 0 .7rem; display: grid; gap: .3rem; }
.sh-current b { font: 700 1.05rem/1 var(--font-display); letter-spacing: .02em; color: var(--sh-ink); }

/* selector */
.sh-sel { display: grid; gap: .2rem; }
.sh-sel__btn {
  display: grid; grid-template-columns: 2rem 1fr auto; align-items: center; gap: .6rem;
  width: 100%; padding: .58rem .8rem; text-align: left; cursor: pointer;
  background: none; border: 1px solid transparent; color: var(--sh-soft);
  font: 600 .8rem/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.sh-sel__btn:hover { color: var(--sh-ink); border-color: var(--sh-line); }
.sh-sel__num { color: var(--sh-dim); font-size: .66rem; }
.sh-sel__mark { width: 8px; height: 8px; border: 1px solid var(--sh-line); transform: rotate(45deg); transition: background .2s ease, border-color .2s ease; }
.sh-sel__btn.is-on { color: var(--sh-ink); background: var(--sh-raised); border-color: var(--sh-line); }
.sh-sel__btn.is-on .sh-sel__num { color: var(--sh-red-text); }
.sh-sel__btn.is-on .sh-sel__mark { background: var(--sh-red); border-color: var(--sh-red); }
.sh-sel__btn.is-on .sh-sel__name::after { content: "  ·  ACTIVE"; color: var(--sh-dim); font-size: .6rem; white-space: pre; }

/* readout */
.sh-readout { border: 1px solid var(--sh-line); padding: .9rem 1rem 1rem; clip-path: var(--sh-cut); background: var(--sh-bg); }
.sh-readout__head, .sh-readout__rows { margin: .7rem 0 0; display: grid; gap: .3rem; }
.sh-readout__head div, .sh-readout__rows div { display: grid; grid-template-columns: 6.2rem 1fr; gap: .6rem; padding: .3rem 0; border-bottom: 1px solid var(--sh-line-soft); }
.sh-readout dt { font: 500 .62rem/1.5 var(--font-mono); letter-spacing: .16em; color: var(--sh-dim); }
.sh-readout dd { margin: 0; font: 600 .68rem/1.5 var(--font-mono); letter-spacing: .12em; color: var(--sh-ink); text-transform: uppercase; }
.sh-readout__profile { color: var(--sh-red-text) !important; font-size: .78rem !important; }
.sh-readout dd.is-hot { animation: sh-hot 1.2s ease; }
@keyframes sh-hot { 0% { color: var(--sh-red-text); } 100% { color: var(--sh-ink); } }
.sh-readout__note { margin-top: .8rem; display: grid; gap: .35rem; }
.sh-readout__note p { margin: 0; font-size: .78rem; line-height: 1.5; color: var(--sh-soft); }
.sh-readout__note b { font: 600 .62rem/1 var(--font-mono); letter-spacing: .16em; color: var(--sh-red-text); margin-right: .35rem; }

/* tools */
.sh-tools { display: flex; flex-wrap: wrap; gap: .35rem; }
.sh-tool { padding: .58rem .62rem; background: none; border: 1px solid var(--sh-line); color: var(--sh-soft); cursor: pointer; font: 600 .62rem/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; transition: color .2s ease, border-color .2s ease, background .2s ease; }
.sh-tool:hover { color: var(--sh-ink); border-color: var(--sh-soft); }
.sh-tool.is-on { color: var(--sh-ink); border-color: var(--sh-red); background: rgba(233,0,18,.1); }
.sh-finish { margin-left: auto; color: var(--sh-dim); border-style: dashed; }
.sh-finish.is-ready { color: var(--sh-ink); border-style: solid; border-color: var(--sh-red); }

/* customize */
.sh-custom { display: grid; gap: .9rem; padding: 1rem; border: 1px solid var(--sh-line); background: var(--sh-bg); }
.sh-custom[hidden] { display: none; }
.sh-dial { display: grid; gap: .3rem; }
.sh-dial label { font: 600 .68rem/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--sh-ink); }
.sh-dial input { width: 100%; accent-color: var(--sh-red); margin: .2rem 0; }
.sh-dial__ends { display: flex; justify-content: space-between; font: 500 .58rem/1 var(--font-mono); letter-spacing: .14em; color: var(--sh-dim); }
.sh-modes { display: grid; gap: .4rem; }
.sh-modes > div { display: flex; flex-wrap: wrap; gap: .3rem; }
.sh-mode { padding: .45rem .55rem; background: none; border: 1px solid var(--sh-line); color: var(--sh-soft); cursor: pointer; font: 600 .6rem/1 var(--font-mono); letter-spacing: .12em; }
.sh-mode.is-on { color: var(--sh-ink); border-color: var(--sh-red); }
.sh-mode.is-on::before { content: "▲ "; color: var(--sh-red-text); font-size: .5rem; }
.sh-modes--color > div { align-items: center; gap: .45rem; }
.sh-swatch { position: relative; width: 26px; height: 26px; padding: 0; border-radius: 50%; border: 2px solid var(--sh-line); background: var(--sw); cursor: pointer; transition: transform .15s ease, border-color .15s ease; }
.sh-swatch:hover { transform: scale(1.12); border-color: var(--sh-soft); }
.sh-swatch.is-on { border-color: var(--sh-ink); outline: 2px solid var(--sh-ink); outline-offset: 2px; }
.sh-swatch.is-on::after { content: ""; position: absolute; inset: 7px; border-radius: 50%; background: var(--sh-ink); mix-blend-mode: difference; }
.sh-swatch__name { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.sh-swatch:focus-visible { outline: 2px solid var(--sh-red); outline-offset: 3px; }

/* compare */
.sh-compare { display: grid; gap: .6rem; padding: 1rem; border: 1px solid var(--sh-line); background: var(--sh-bg); }
.sh-compare[hidden] { display: none; }
.sh-compare__pick { display: grid; gap: .35rem; }
.sh-select { width: 100%; padding: .55rem .6rem; background: var(--sh-raised); color: var(--sh-ink); border: 1px solid var(--sh-line); font: 600 .72rem/1 var(--font-mono); letter-spacing: .12em; }

/* the frame around the demo */
.sh-frame { flex: 1; display: flex; flex-direction: column; min-height: 0; border: 1px solid var(--sh-line); background: #000; box-shadow: 0 30px 80px rgba(0,0,0,.55); }
.sh-frame__bar { display: flex; align-items: center; gap: .8rem; padding: .5rem .8rem; border-bottom: 1px solid var(--sh-line); background: var(--sh-raised); font: 500 .64rem/1 var(--font-mono); letter-spacing: .14em; color: var(--sh-dim); }
.sh-frame__dots { display: flex; gap: .3rem; }
.sh-frame__dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--sh-line); }
.sh-frame__url { flex: 1; text-align: center; color: var(--sh-soft); }
.sh-frame__sys { color: var(--sh-red-text); text-transform: uppercase; }
.sh-view { position: relative; flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; scrollbar-width: thin; }
/* while a dial is dragged the demo answers fast and all at once; system switches keep the slow, staggered morph */
.demo.is-tuning, .demo.is-tuning * { transition-duration: .16s !important; transition-delay: 0s !important; }
/* layout changes (system switch, grid mode, reset) cross-fade through a view transition where supported */
::view-transition-old(root), ::view-transition-new(root) { animation-duration: .5s; animation-timing-function: cubic-bezier(.22, .8, .3, 1); }
/* the red scan that marks a system change */
.sh-view::after { content: ""; position: sticky; top: 0; display: block; height: 0; }
.demo.is-shifting::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--sh-red, #E90012); box-shadow: 0 0 18px rgba(233,0,18,.8); animation: sh-scan var(--d-motion, 600ms) linear forwards; pointer-events: none; z-index: 5; }
@keyframes sh-scan { from { transform: translateY(0); opacity: 1; } to { transform: translateY(80vh); opacity: 0; } }

/* compare overlay */
.sh-view.is-compare .demo--b { position: absolute; inset: 0 0 auto 0; }
.demo--b { display: none; }
.sh-view.is-compare .demo--b { display: block; }
.sh-split__range { display: none; position: sticky; bottom: 0; left: 0; width: 100%; margin: 0; accent-color: var(--sh-red); opacity: .001; height: 28px; z-index: 6; cursor: col-resize; }
.sh-view.is-compare .sh-split__range { display: block; }
.sh-split__handle { display: none; position: sticky; top: 0; height: 0; z-index: 5; pointer-events: none; }
.sh-view.is-compare .sh-split__handle { display: block; }
.sh-split__bar { position: absolute; top: 0; left: var(--px, 50%); width: 14px; height: 100vh; margin-left: -7px; pointer-events: auto; cursor: col-resize; touch-action: none; }
.sh-split__bar::before { content: ""; position: absolute; top: 0; bottom: 0; left: 6px; width: 2px; background: var(--sh-red); box-shadow: 0 0 12px rgba(233,0,18,.7); }
.sh-split__grip { position: absolute; top: var(--py, 50%); left: var(--px, 50%); width: 38px; height: 38px; margin: -19px 0 0 -19px; border-radius: 50%; background: var(--sh-red); color: #fff; display: grid; place-items: center; font: 700 .7rem/1 var(--font-mono); pointer-events: auto; cursor: col-resize; touch-action: none; box-shadow: 0 4px 14px rgba(0,0,0,.4); transition: transform .15s ease; }
.sh-split__grip::before { content: "◂ ▸"; }
.sh-split__handle.is-dragging .sh-split__grip { transform: scale(1.12); }
.sh-split__handle.is-vertical .sh-split__bar { left: 0; top: var(--py, 50%); width: 100%; height: 14px; margin: -7px 0 0 0; cursor: row-resize; }
.sh-split__handle.is-vertical .sh-split__bar::before { left: 0; right: 0; top: 6px; bottom: auto; width: auto; height: 2px; }
.sh-split__handle.is-vertical .sh-split__grip { left: 50%; margin: -19px 0 0 -19px; cursor: row-resize; }
.sh-split__handle.is-vertical .sh-split__grip::before { content: "▴ ▾"; }
.sh-split__tags { display: none; position: sticky; top: 0; height: 0; z-index: 5; pointer-events: none; }
.sh-view.is-compare .sh-split__tags { display: block; }
.sh-split__tag { position: absolute; top: .6rem; padding: .35rem .55rem; background: rgba(13,13,13,.85); color: #fff; font: 600 .62rem/1 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; }
.sh-split__tag--a { left: .6rem; }
.sh-split__tag--b { right: .6rem; }
.sh-view.is-compare .demo:not(.demo--b) { position: relative; }

/* ---------- outro ---------- */
.sh-outro { min-height: calc(100vh - var(--sh-head, 46px)); display: flex; flex-direction: column; justify-content: center; padding: clamp(3rem, 8vw, 6rem) clamp(1.25rem, 6vw, 5rem); background-image: radial-gradient(rgba(244,244,245,.07) 1px, transparent 1px); background-size: 28px 28px; }
.sh-outro__title { margin: 1.4rem 0 1rem; font: 800 clamp(2.4rem, 7vw, 5.6rem)/.98 var(--font-display); letter-spacing: -.035em; text-transform: uppercase; }
.sh-outro__line { margin: 0 0 2rem; font: 600 clamp(1.3rem, 3.4vw, 2.4rem)/1.1 var(--font-display); letter-spacing: -.02em; text-transform: uppercase; color: var(--sh-red); }
.sh-outro__brand { margin: 0 0 2.2rem; display: grid; gap: .25rem; font: 600 .72rem/1 var(--font-mono); letter-spacing: .18em; text-transform: uppercase; color: var(--sh-soft); }
.sh-outro__brand b { color: var(--sh-ink); font-size: 1rem; }
.sh-outro__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; margin-bottom: 2.6rem; }
.sh-outro__back { opacity: .7; }

/* ---------- responsive: the workstation becomes a column ---------- */
@media (max-width: 900px) {
  .sh-work { grid-template-columns: 1fr; grid-template-rows: auto auto; grid-template-areas: "rail" "canvas"; height: auto; min-height: 0; }
  .sh-rail { position: sticky; top: 0; z-index: 8; border-right: 0; border-bottom: 1px solid var(--sh-line); padding: .7rem 1rem .7rem; display: grid; grid-template-columns: auto 1fr; gap: .45rem 1rem; align-items: center; }
  .sh-tools { grid-column: 1 / -1; margin: .1rem 0 0; flex-wrap: nowrap; gap: .3rem; }
  .sh-tool { flex: 1; padding: .6rem .3rem; font-size: .58rem; letter-spacing: .1em; text-align: center; }
  .sh-tool--readout { display: block; }
  .sh-finish { margin-left: 0; }
  /* the demo fills what is left under the sticky switcher; the page still scrolls past it to the footer */
  .sh-canvas { padding: .6rem; }
  .sh-view { flex: none; height: calc(100vh - var(--sh-head, 46px) - var(--sh-rail, 150px) - 3.4rem); min-height: 420px; overscroll-behavior: auto; }
  @supports (height: 100dvh) { .sh-view { height: calc(100dvh - var(--sh-head, 46px) - var(--sh-rail, 150px) - 3.4rem); } }
  /* the panel becomes a bottom sheet over the demo: open it from the tool row, dial, watch the site change above it */
  .sh-panel { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; max-height: 58vh; overflow-y: auto; border-right: 0; border-top: 1px solid var(--sh-line); box-shadow: 0 -20px 60px rgba(0,0,0,.6); padding: 0 1rem 5.2rem; transform: translateY(100%); visibility: hidden; transition: transform .28s cubic-bezier(.22,.8,.3,1), visibility 0s linear .28s; }
  .sh-panel.is-open { transform: none; visibility: visible; transition: transform .28s cubic-bezier(.22,.8,.3,1), visibility 0s; }
  .sh-sheet__head { display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 2; margin: 0 -1rem .6rem; padding: .7rem 1rem .6rem; background: var(--sh-panel); border-bottom: 1px solid var(--sh-line-soft); }
  .sh-sheet__title { color: var(--sh-ink); }
  body.sh-sheet-open .a11y-btn { bottom: calc(var(--sh-sheet, 0px) + .7rem); transition: bottom .28s cubic-bezier(.22,.8,.3,1); }
  .sh-sheet__close { width: 36px; height: 36px; display: grid; place-items: center; background: none; border: 1px solid var(--sh-line); color: var(--sh-ink); font-size: .9rem; cursor: pointer; }
  .sh-sheet__close:hover { border-color: var(--sh-red); }
  .sh-readout, .sh-custom, .sh-compare { border: 0; padding: .2rem 0 0; clip-path: none; background: none; }
  .sh-readout .sh-rail__head, .sh-readout > .sh-mono--kicker { display: none; }
  .sh-custom > .sh-mono--dim:first-child, .sh-compare > .sh-mono--dim:first-child { display: none; }
  .sh-rail__head { display: none; }
  .sh-current { margin: 0; grid-column: 1 / -1; grid-template-columns: auto auto; align-items: baseline; gap: .6rem; justify-content: start; }
  .sh-current b { font-size: .9rem; }
  .sh-sel { grid-column: 1 / -1; display: flex; gap: .35rem; overflow-x: auto; scrollbar-width: none; padding-bottom: .1rem; margin: 0 -1rem; padding-inline: 1rem; }
  .sh-sel::-webkit-scrollbar { display: none; }
  .sh-sel__btn { flex: none; width: auto; grid-template-columns: auto auto auto; gap: .45rem; padding: .55rem .7rem; font-size: .7rem; border-color: var(--sh-line); }
  .sh-current .sh-mono { white-space: nowrap; }
  .sh-sel__btn.is-on .sh-sel__name::after { content: ""; }
  .sh-intro__title { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sh *, .sh *::before, .sh *::after { animation: none !important; transition: none !important; }
}

/* ==========================================================================
   THE DEMO — Halden Studio, dressed by tokens
   --d-scale multiplies type, --d-space multiplies rhythm, --d-radius rounds,
   --d-motion times the morph. data-* attributes pick layout variants.
   ========================================================================== */
.demo {
  --u: calc(1rem * var(--d-space, 1));
  --h1: calc(3.2rem * var(--d-scale, 1)); --h2: calc(2rem * var(--d-scale, 1)); --h3: calc(1.15rem * var(--d-scale, 1)); --lead: calc(1.1rem * var(--d-scale, 1));
  --t: var(--d-motion, 500ms); --ease: cubic-bezier(.22, .8, .3, 1);
  position: relative; container-type: inline-size; min-height: 100%;
  background: var(--d-bg); color: var(--d-ink); font-family: var(--d-font-body); font-size: 15px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}
.demo *, .demo *::before, .demo *::after { box-sizing: border-box; }
.demo a { text-decoration: none; }
.demo a:not(.demo-btn) { color: inherit; }
.demo p { margin: 0; }
.demo h1, .demo h2, .demo h3 { margin: 0; font-family: var(--d-font-display); font-weight: var(--d-weight); letter-spacing: var(--d-track); text-transform: var(--d-upper); line-height: 1.02; }
/* every section rolls into the new system a beat after the one above it */
.demo [data-sec] { transition: padding var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease), color var(--t) var(--ease); transition-delay: calc(var(--i, 0) * 45ms); }
.demo [data-sec] * { transition: font-size var(--t) var(--ease), font-weight var(--t) var(--ease), letter-spacing var(--t) var(--ease), padding var(--t) var(--ease), margin var(--t) var(--ease), gap var(--t) var(--ease), border-radius var(--t) var(--ease), border-width var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease), color var(--t) var(--ease), max-width var(--t) var(--ease), width var(--t) var(--ease), height var(--t) var(--ease), opacity var(--t) var(--ease), transform var(--t) var(--ease), filter var(--t) var(--ease), box-shadow var(--t) var(--ease); transition-delay: calc(var(--i, 0) * 45ms); }
.demo-wrap { width: min(var(--d-container), 100% - calc(var(--u) * 3)); margin-inline: auto; }
.demo-label { font-family: var(--d-font-label); font-size: .68rem; letter-spacing: var(--d-label-track); text-transform: uppercase; color: var(--d-soft); }
.demo-kicker { font-family: var(--d-font-label); font-size: .72rem; letter-spacing: var(--d-label-track); text-transform: uppercase; color: var(--d-soft); margin-bottom: calc(var(--u) * 1.2); }
.demo-h1 { font-size: var(--h1); max-width: 14ch; }
.demo-h2 { font-size: var(--h2); max-width: 18ch; }
.demo-h3 { font-size: var(--h3); }
.demo-lead { font-size: var(--lead); color: var(--d-soft); max-width: 36rem; line-height: 1.55; margin-top: calc(var(--u) * 1.1); }
.demo-body { color: var(--d-soft); line-height: 1.7; max-width: 42rem; margin-top: calc(var(--u) * .9); }
.demo-head { margin-bottom: calc(var(--u) * 2.2); display: grid; gap: calc(var(--u) * .6); }

/* buttons: geometry follows radius, weight follows the system */
.demo-btn { display: inline-flex; align-items: center; gap: .5rem; padding: .85em 1.5em; border: var(--d-line-w) solid var(--d-ink); border-radius: var(--d-radius); font-family: var(--d-font-label); font-size: .84rem; font-weight: 600; letter-spacing: calc(var(--d-label-track) * .5); text-transform: var(--d-upper); }
.demo-btn--primary { background: var(--d-ink); color: var(--d-bg); border-color: var(--d-ink); }
.demo-btn--secondary { background: transparent; color: var(--d-ink); }
.demo-btn--nav { padding: .6em 1.1em; font-size: .74rem; }
.demo-actions { display: flex; flex-wrap: wrap; gap: calc(var(--u) * .8); margin-top: calc(var(--u) * 2); }
.demo-more { display: inline-block; margin-top: calc(var(--u) * .9); font-family: var(--d-font-label); font-size: .7rem; letter-spacing: var(--d-label-track); text-transform: uppercase; color: var(--d-accent-text); }

/* abstract product art: CSS shapes toned by the system, no images */
.demo-art { display: block; position: relative; overflow: hidden; background: var(--d-img-tone); border-radius: var(--d-radius); filter: var(--d-img-filter); aspect-ratio: 4 / 3; }
.demo-art i { position: absolute; display: block; background: var(--d-ink); opacity: .85; }
.demo-art[data-kind="hero"] i:nth-child(1) { left: 18%; top: 22%; width: 34%; height: 34%; border-radius: 50%; background: var(--d-accent); opacity: 1; }
.demo-art[data-kind="hero"] i:nth-child(2) { left: 14%; bottom: 14%; width: 72%; height: 4%; }
.demo-art[data-kind="hero"] i:nth-child(3) { right: 16%; top: 16%; width: 6%; height: 70%; opacity: .35; }
.demo-art[data-kind="arc"] i:nth-child(1) { left: 22%; top: 18%; width: 56%; height: 56%; border-radius: 50%; border: 6px solid var(--d-ink); background: none; clip-path: inset(0 0 50% 0); }
.demo-art[data-kind="arc"] i:nth-child(2) { left: 47%; top: 44%; width: 3%; height: 40%; }
.demo-art[data-kind="arc"] i:nth-child(3) { left: 30%; bottom: 12%; width: 40%; height: 4%; }
.demo-art[data-kind="ledge"] i:nth-child(1) { left: 12%; top: 40%; width: 76%; height: 6%; }
.demo-art[data-kind="ledge"] i:nth-child(2) { left: 22%; top: 46%; width: 4%; height: 36%; }
.demo-art[data-kind="ledge"] i:nth-child(3) { right: 22%; top: 46%; width: 4%; height: 36%; }
.demo-art[data-kind="form"] i:nth-child(1) { left: 28%; top: 20%; width: 26%; height: 46%; border-radius: 40% 40% 0 0; background: var(--d-accent); opacity: 1; }
.demo-art[data-kind="form"] i:nth-child(2) { left: 26%; top: 60%; width: 48%; height: 5%; }
.demo-art[data-kind="form"] i:nth-child(3) { left: 46%; top: 64%; width: 4%; height: 26%; }

/* ---------- nav ---------- */
.demo-nav { padding: calc(var(--u) * 1.1) 0; border-bottom: var(--d-line-w) solid var(--d-line); }
.demo-nav .demo-wrap { display: flex; align-items: center; gap: calc(var(--u) * 1.6); }
.demo-brand { font-family: var(--d-font-display); font-weight: var(--d-weight); letter-spacing: var(--d-track); text-transform: var(--d-upper); font-size: calc(1.2rem * var(--d-scale)); }
.demo-brand span { color: var(--d-soft); font-weight: 400; }
.demo-nav__links { display: flex; gap: calc(var(--u) * 1.2); font-family: var(--d-font-label); font-size: .78rem; letter-spacing: calc(var(--d-label-track) * .5); text-transform: var(--d-upper); }
.demo-nav__links a { padding: .3rem 0; border-bottom: 2px solid transparent; }
.demo-nav__links a.is-on { border-bottom-color: var(--d-accent); }
.demo-nav__meta { margin-left: auto; font-family: var(--d-font-label); font-size: .68rem; letter-spacing: var(--d-label-track); text-transform: uppercase; color: var(--d-soft); }
.demo[data-nav="sparse"] .demo-nav__meta { display: none; }
.demo[data-nav="sparse"] .demo-nav__links { margin-left: auto; }
.demo[data-nav="centered"] .demo-nav .demo-wrap { flex-direction: column; gap: calc(var(--u) * .8); }
.demo[data-nav="centered"] .demo-brand { font-size: calc(1.8rem * var(--d-scale)); }
.demo[data-nav="centered"] .demo-nav__meta { margin: 0; }
.demo[data-nav="centered"] .demo-btn--nav { display: none; }
.demo[data-nav="bar"] .demo-nav { padding: 0; border-bottom-width: calc(var(--d-line-w) * 1.5); }
.demo[data-nav="bar"] .demo-nav .demo-wrap { width: 100%; gap: 0; }
.demo[data-nav="bar"] .demo-nav .demo-wrap > * { padding: calc(var(--u) * .9) calc(var(--u) * 1.2); border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-nav="bar"] .demo-nav__links { gap: 0; flex: 1; }
.demo[data-nav="bar"] .demo-nav__links a { padding: calc(var(--u) * .9) calc(var(--u) * 1.2); border-bottom: 0; border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-nav="bar"] .demo-nav__links a.is-on { background: var(--d-ink); color: var(--d-bg); }
.demo[data-nav="bar"] .demo-btn--nav { border: 0; border-radius: 0; background: var(--d-accent); color: var(--d-on-accent); }
.demo[data-nav="boxed"] .demo-nav__links a { padding: .45rem .8rem; border: 1px solid var(--d-line); border-radius: var(--d-radius); }
.demo[data-nav="boxed"] .demo-nav__links a.is-on { border-color: var(--d-accent); color: var(--d-accent-text); }
.demo[data-nav="boxed"] .demo-nav__meta::before { content: "● "; color: var(--d-accent); }
.demo[data-nav="masthead"] .demo-nav .demo-wrap { flex-wrap: wrap; }
.demo[data-nav="masthead"] .demo-brand { width: 100%; font-size: calc(2.6rem * var(--d-scale)); padding-bottom: calc(var(--u) * .6); border-bottom: var(--d-line-w) solid var(--d-ink); }
.demo[data-nav="masthead"] .demo-nav__links { font-family: var(--d-font-body); }
.demo[data-nav="masthead"] .demo-btn--nav { border: 0; padding: 0; text-decoration: underline; text-underline-offset: 3px; }
.demo[data-nav="loud"] .demo-brand { font-size: calc(2rem * var(--d-scale)); }
.demo[data-nav="loud"] .demo-nav__links, .demo[data-nav="loud"] .demo-nav__meta { display: none; }
.demo[data-nav="loud"] .demo-btn--nav { margin-left: auto; background: var(--d-accent); color: var(--d-on-accent); border-color: var(--d-accent); font-size: .9rem; padding: .8em 1.4em; }

/* ---------- hero ---------- */
.demo-hero { padding: calc(var(--u) * 5) 0 calc(var(--u) * 4); }
.demo-hero .demo-wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: calc(var(--u) * 3); align-items: center; }
.demo-hero__visual { grid-row: 1 / span 4; grid-column: 2; }
.demo-hero__spec { list-style: none; margin: calc(var(--u) * 2.4) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: calc(var(--u) * 1.6); font-family: var(--d-font-label); font-size: .72rem; letter-spacing: calc(var(--d-label-track) * .5); }
.demo-hero__spec li { display: grid; gap: .2rem; }
.demo-hero__spec span { text-transform: uppercase; color: var(--d-soft); font-size: .62rem; letter-spacing: var(--d-label-track); }
.demo-hero__spec b { font-weight: 600; }
.demo[data-hero="quiet"] .demo-hero { padding-top: calc(var(--u) * 6); }
.demo[data-hero="quiet"] .demo-hero__visual { opacity: .9; }
.demo[data-hero="quiet"] .demo-hero__spec { display: none; }
.demo[data-hero="stage"] .demo-hero .demo-wrap { grid-template-columns: 1fr; text-align: center; justify-items: center; }
.demo[data-hero="stage"] .demo-hero__visual { grid-row: auto; grid-column: 1; width: min(100%, 720px); margin-top: calc(var(--u) * 2); }
.demo[data-hero="stage"] .demo-art { aspect-ratio: 16 / 7; box-shadow: 0 0 0 1px var(--d-line), 0 0 0 calc(var(--u) * .8) var(--d-bg), 0 0 0 calc(var(--u) * .8 + 1px) var(--d-line); }
.demo[data-hero="stage"] .demo-h1 { font-size: calc(var(--h1) * 1.25); max-width: 18ch; }
.demo[data-hero="stage"] .demo-lead { margin-inline: auto; }
.demo[data-hero="stage"] .demo-hero__spec { justify-content: center; }
.demo[data-hero="grid"] .demo-hero { padding: 0; border-bottom: var(--d-line-w) solid var(--d-line); }
.demo[data-hero="grid"] .demo-hero .demo-wrap { width: 100%; gap: 0; align-items: stretch; }
.demo[data-hero="grid"] .demo-hero .demo-wrap > * { padding-inline: calc(var(--u) * 1.6); }
.demo[data-hero="grid"] .demo-kicker { padding-top: calc(var(--u) * 2.4); }
.demo[data-hero="grid"] .demo-hero__visual { border-left: var(--d-line-w) solid var(--d-line); padding: calc(var(--u) * 1.6); display: grid; align-content: center; }
.demo[data-hero="grid"] .demo-art { border: var(--d-line-w) solid var(--d-line); }
.demo[data-hero="grid"] .demo-hero__spec { margin: calc(var(--u) * 2) 0 0; gap: 0; border-top: var(--d-line-w) solid var(--d-line); }
.demo[data-hero="grid"] .demo-hero__spec li { flex: 1; padding: calc(var(--u) * .8) 0; border-right: var(--d-line-w) solid var(--d-line); padding-inline: calc(var(--u) * .8); }
.demo[data-hero="grid"] .demo-hero__spec li:first-child { padding-left: 0; }
.demo[data-hero="grid"] .demo-actions { padding-bottom: calc(var(--u) * 2.4); }
.demo[data-hero="modules"] .demo-hero__visual { display: grid; gap: calc(var(--u) * .6); }
.demo[data-hero="modules"] .demo-art { aspect-ratio: 16 / 9; border: 1px solid var(--d-line); }
.demo[data-hero="modules"] .demo-hero__spec { display: grid; grid-template-columns: repeat(3, 1fr); gap: calc(var(--u) * .6); grid-column: 2; margin: 0; }
.demo[data-hero="modules"] .demo-hero__spec li { padding: calc(var(--u) * .7); border: 1px solid var(--d-line); border-radius: var(--d-radius); background: var(--d-surface); }
.demo[data-hero="asym"] .demo-hero .demo-wrap { grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); align-items: end; }
.demo[data-hero="asym"] .demo-h1 { font-size: calc(var(--h1) * 1.45); max-width: 12ch; }
.demo[data-hero="asym"] .demo-lead { border-left: var(--d-line-w) solid var(--d-ink); padding-left: calc(var(--u) * 1.2); }
.demo[data-hero="asym"] .demo-hero__visual { grid-row: 1 / span 2; align-self: start; padding-top: calc(var(--u) * 3); }
.demo[data-hero="asym"] .demo-art { aspect-ratio: 3 / 4; }
.demo[data-hero="asym"] .demo-hero__spec { display: none; }
.demo[data-hero="wall"] .demo-hero { padding: calc(var(--u) * 3) 0 0; }
.demo[data-hero="wall"] .demo-hero .demo-wrap { grid-template-columns: 1fr; }
.demo[data-hero="wall"] .demo-h1 { font-size: calc(var(--h1) * 1.9); max-width: 9ch; line-height: .92; }
.demo[data-hero="wall"] .demo-h1::after { content: ""; display: block; width: calc(var(--u) * 6); height: calc(var(--u) * .6); background: var(--d-accent); margin-top: calc(var(--u) * 1.2); }
.demo[data-hero="wall"] .demo-hero__visual { grid-row: auto; grid-column: 1; margin-top: calc(var(--u) * 2.5); }
.demo[data-hero="wall"] .demo-art { aspect-ratio: 21 / 8; border-radius: 0; }
.demo[data-hero="wall"] .demo-hero__spec { display: none; }
.demo[data-hero="wall"] .demo-hero .demo-btn--primary { background: var(--d-accent); border-color: var(--d-accent); color: var(--d-on-accent); font-size: 1rem; padding: 1.1em 2em; }

/* ---------- proof ---------- */
.demo-proof { padding: calc(var(--u) * 2.2) 0; border-top: var(--d-line-w) solid var(--d-line); border-bottom: var(--d-line-w) solid var(--d-line); }
.demo-proof .demo-wrap { display: grid; grid-template-columns: auto 1fr auto; gap: calc(var(--u) * 2.5); align-items: center; }
.demo-stats { list-style: none; margin: 0; padding: 0; display: flex; gap: calc(var(--u) * 2.5); }
.demo-stats li { display: grid; gap: .15rem; }
.demo-stats b { font-family: var(--d-font-display); font-weight: var(--d-weight); font-size: calc(1.6rem * var(--d-scale)); letter-spacing: var(--d-track); line-height: 1; }
.demo-stats span { font-size: .78rem; color: var(--d-soft); }
.demo-logos { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: calc(var(--u) * 1.2); font-family: var(--d-font-display); font-weight: var(--d-weight); font-size: .9rem; letter-spacing: var(--d-track); color: var(--d-soft); }
.demo[data-proof="inline"] .demo-proof { border-top: 0; }
.demo[data-proof="centered"] .demo-proof .demo-wrap { grid-template-columns: 1fr; justify-items: center; text-align: center; gap: calc(var(--u) * 1.4); }
.demo[data-proof="centered"] .demo-stats { gap: calc(var(--u) * 4); }
.demo[data-proof="centered"] .demo-logos { font-family: var(--d-font-display); font-style: italic; font-size: 1.05rem; }
.demo[data-proof="table"] .demo-proof { padding: 0; }
.demo[data-proof="table"] .demo-proof .demo-wrap { width: 100%; gap: 0; }
.demo[data-proof="table"] .demo-proof .demo-wrap > * { padding: calc(var(--u) * 1.2) calc(var(--u) * 1.6); border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-proof="table"] .demo-stats { gap: 0; }
.demo[data-proof="table"] .demo-stats li { padding-right: calc(var(--u) * 1.6); margin-right: calc(var(--u) * 1.6); border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-proof="table"] .demo-logos { font-family: var(--d-font-label); font-size: .72rem; letter-spacing: var(--d-label-track); text-transform: uppercase; }
.demo[data-proof="modules"] .demo-proof { border: 0; }
.demo[data-proof="modules"] .demo-proof .demo-wrap { grid-template-columns: 1fr; }
.demo[data-proof="modules"] .demo-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: calc(var(--u) * .6); }
.demo[data-proof="modules"] .demo-stats li { padding: calc(var(--u) * 1); border: 1px solid var(--d-line); border-radius: var(--d-radius); background: var(--d-surface); }
.demo[data-proof="modules"] .demo-stats b { color: var(--d-accent-text); }
.demo[data-proof="modules"] .demo-logos { font-family: var(--d-font-label); font-size: .7rem; letter-spacing: var(--d-label-track); text-transform: uppercase; }
.demo[data-proof="rule"] .demo-proof { border-top-width: calc(var(--d-line-w) * 3); border-top-color: var(--d-ink); border-bottom: 0; }
.demo[data-proof="rule"] .demo-logos { font-style: italic; }
.demo[data-proof="blocks"] .demo-proof { border: 0; padding: 0; }
.demo[data-proof="blocks"] .demo-proof .demo-wrap { width: 100%; grid-template-columns: 1fr; gap: 0; }
.demo[data-proof="blocks"] .demo-label { display: none; }
.demo[data-proof="blocks"] .demo-stats { gap: 0; }
.demo[data-proof="blocks"] .demo-stats li { flex: 1; padding: calc(var(--u) * 2) calc(var(--u) * 1.6); background: var(--d-accent); color: var(--d-on-accent); }
.demo[data-proof="blocks"] .demo-stats li:nth-child(2) { background: var(--d-ink); color: var(--d-bg); }
.demo[data-proof="blocks"] .demo-stats li:nth-child(3) { background: var(--d-surface); color: var(--d-ink); }
.demo[data-proof="blocks"] .demo-stats b { font-size: calc(2.6rem * var(--d-scale)); }
.demo[data-proof="blocks"] .demo-stats span { color: inherit; }
.demo[data-proof="blocks"] .demo-logos { padding: calc(var(--u) * 1.2) calc(var(--u) * 1.6); font-size: .8rem; text-transform: uppercase; }

/* ---------- features ---------- */
.demo-features { padding: calc(var(--u) * 4.5) 0; }
.demo-cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: calc(var(--u) * 1.4); }
.demo-card { padding: calc(var(--u) * 1.6); border: var(--d-line-w) solid var(--d-line); border-radius: var(--d-radius); background: var(--d-surface); display: grid; gap: calc(var(--u) * .6); align-content: start; }
.demo-card p { color: var(--d-soft); font-size: .92rem; }
.demo-card__n { font-family: var(--d-font-label); font-size: .66rem; letter-spacing: var(--d-label-track); color: var(--d-soft); }
.demo[data-cards="list"] .demo-cards { grid-template-columns: 1fr; gap: 0; }
.demo[data-cards="list"] .demo-card { grid-template-columns: 4rem minmax(0, 14rem) 1fr auto; align-items: baseline; gap: calc(var(--u) * 1.5); padding: calc(var(--u) * 1.4) 0; border: 0; border-top: 1px solid var(--d-line); background: none; border-radius: 0; }
.demo[data-cards="list"] .demo-card:last-child { border-bottom: 1px solid var(--d-line); }
.demo[data-cards="list"] .demo-more { margin: 0; }
.demo[data-cards="framed"] .demo-card { background: none; padding: calc(var(--u) * 2.2) calc(var(--u) * 1.8); text-align: center; justify-items: center; }
.demo[data-cards="framed"] .demo-card__n { display: none; }
.demo[data-cards="framed"] .demo-h3 { font-size: calc(var(--h3) * 1.3); }
.demo[data-cards="cells"] .demo-cards { gap: 0; border: var(--d-line-w) solid var(--d-line); }
.demo[data-cards="cells"] .demo-card { border: 0; border-right: var(--d-line-w) solid var(--d-line); border-radius: 0; background: none; }
.demo[data-cards="cells"] .demo-card:last-child { border-right: 0; }
.demo[data-cards="cells"] .demo-card__n { font-size: 1.6rem; font-weight: 700; color: var(--d-accent-text); }
.demo[data-cards="modules"] .demo-card { position: relative; }
.demo[data-cards="modules"] .demo-card::before { content: ""; position: absolute; top: calc(var(--u) * 1.6); right: calc(var(--u) * 1.6); width: 8px; height: 8px; border-radius: 50%; background: var(--d-accent); }
.demo[data-cards="columns"] .demo-cards { gap: 0; }
.demo[data-cards="columns"] .demo-card { border: 0; border-left: var(--d-line-w) solid var(--d-ink); border-radius: 0; background: none; padding: 0 calc(var(--u) * 1.6) 0; }
.demo[data-cards="columns"] .demo-card__n { font-size: 2.4rem; font-family: var(--d-font-display); color: var(--d-ink); line-height: 1; }
.demo[data-cards="columns"] .demo-h3 { font-size: calc(var(--h3) * 1.4); }
.demo[data-cards="blocks"] .demo-cards { gap: calc(var(--u) * .5); }
.demo[data-cards="blocks"] .demo-card { border: 0; background: var(--d-surface); padding: calc(var(--u) * 2); }
.demo[data-cards="blocks"] .demo-card:first-child { background: var(--d-accent); color: var(--d-on-accent); }
.demo[data-cards="blocks"] .demo-card:first-child p, .demo[data-cards="blocks"] .demo-card:first-child .demo-card__n, .demo[data-cards="blocks"] .demo-card:first-child .demo-more { color: var(--d-on-accent); }
.demo[data-cards="blocks"] .demo-h3 { font-size: calc(var(--h3) * 1.5); }

/* ---------- showcase ---------- */
.demo-showcase { padding: calc(var(--u) * 4) 0; background: var(--d-surface); }
.demo-objects { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: calc(var(--u) * 1.4); }
.demo-object { display: grid; gap: calc(var(--u) * .9); }
.demo-object__body { display: grid; gap: .3rem; }
.demo-object p { color: var(--d-soft); font-size: .92rem; }
.demo[data-showcase="single"] .demo-objects { grid-template-columns: 1fr; gap: calc(var(--u) * 2.6); }
.demo[data-showcase="single"] .demo-object { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: center; gap: calc(var(--u) * 2.4); }
.demo[data-showcase="single"] .demo-object:nth-child(even) .demo-art { order: 2; }
.demo[data-showcase="single"] .demo-art { aspect-ratio: 16 / 9; }
.demo[data-showcase="framed3"] .demo-art { aspect-ratio: 3 / 4; box-shadow: 0 0 0 1px var(--d-line), 0 0 0 calc(var(--u) * .5) var(--d-bg), 0 0 0 calc(var(--u) * .5 + 1px) var(--d-line); }
.demo[data-showcase="framed3"] .demo-object__body { text-align: center; }
.demo[data-showcase="grid"] .demo-objects { gap: 0; border: var(--d-line-w) solid var(--d-line); }
.demo[data-showcase="grid"] .demo-object { gap: 0; border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-showcase="grid"] .demo-object:last-child { border-right: 0; }
.demo[data-showcase="grid"] .demo-art { border-radius: 0; border-bottom: var(--d-line-w) solid var(--d-line); }
.demo[data-showcase="grid"] .demo-object__body { padding: calc(var(--u) * 1.2); }
.demo[data-showcase="modules"] .demo-object { border: 1px solid var(--d-line); border-radius: var(--d-radius); padding: calc(var(--u) * .8); background: var(--d-bg); }
.demo[data-showcase="offset"] .demo-objects { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; }
.demo[data-showcase="offset"] .demo-object:nth-child(2) { margin-top: calc(var(--u) * 4); }
.demo[data-showcase="offset"] .demo-object:nth-child(3) { margin-top: calc(var(--u) * 1.5); }
.demo[data-showcase="offset"] .demo-art { aspect-ratio: 4 / 5; }
.demo[data-showcase="bleed"] .demo-showcase .demo-wrap { width: 100%; }
.demo[data-showcase="bleed"] .demo-head { padding-inline: calc(var(--u) * 1.6); }
.demo[data-showcase="bleed"] .demo-objects { gap: calc(var(--u) * .4); }
.demo[data-showcase="bleed"] .demo-art { aspect-ratio: 1; border-radius: 0; }
.demo[data-showcase="bleed"] .demo-object__body { padding: 0 calc(var(--u) * 1.2) calc(var(--u) * 1.2); }
.demo[data-showcase="bleed"] .demo-h3 { font-size: calc(var(--h3) * 1.6); }

/* ---------- about ---------- */
.demo-about { padding: calc(var(--u) * 4.5) 0; }
.demo-about .demo-wrap { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr); gap: calc(var(--u) * 3); align-items: start; }
.demo-facts { margin: 0; display: grid; gap: calc(var(--u) * .8); }
.demo-facts div { display: grid; gap: .15rem; padding: calc(var(--u) * .8) 0; border-top: 1px solid var(--d-line); }
.demo-facts dt { font-family: var(--d-font-label); font-size: .64rem; letter-spacing: var(--d-label-track); text-transform: uppercase; color: var(--d-soft); }
.demo-facts dd { margin: 0; font-family: var(--d-font-display); font-weight: var(--d-weight); font-size: calc(1.3rem * var(--d-scale)); letter-spacing: var(--d-track); }
.demo[data-about="centered"] .demo-about .demo-wrap { grid-template-columns: 1fr; justify-items: center; text-align: center; }
.demo[data-about="centered"] .demo-facts { grid-template-columns: repeat(3, auto); gap: calc(var(--u) * 3); }
.demo[data-about="centered"] .demo-facts div { border-top: 0; }
.demo[data-about="centered"] .demo-body { margin-inline: auto; }
.demo[data-about="split"] .demo-about { padding: 0; border-top: var(--d-line-w) solid var(--d-line); }
.demo[data-about="split"] .demo-about .demo-wrap { width: 100%; gap: 0; }
.demo[data-about="split"] .demo-about__text { padding: calc(var(--u) * 2.6) calc(var(--u) * 1.6); border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-about="split"] .demo-facts { gap: 0; }
.demo[data-about="split"] .demo-facts div { padding: calc(var(--u) * 1.4) calc(var(--u) * 1.6); border-top: 0; border-bottom: var(--d-line-w) solid var(--d-line); }
.demo[data-about="panel"] .demo-about .demo-wrap { border: 1px solid var(--d-line); border-radius: var(--d-radius); padding: calc(var(--u) * 2); background: var(--d-surface); }
.demo[data-about="panel"] .demo-facts div { border-top-color: var(--d-line); }
.demo[data-about="essay"] .demo-about .demo-wrap { grid-template-columns: minmax(0, .5fr) minmax(0, 1.5fr); }
.demo[data-about="essay"] .demo-about__text { grid-column: 2; }
.demo[data-about="essay"] .demo-facts { grid-column: 1; grid-row: 1; }
.demo[data-about="essay"] .demo-body { font-size: 1.08rem; }
.demo[data-about="essay"] .demo-body::first-letter { font-family: var(--d-font-display); font-size: 3.2em; float: left; line-height: .8; margin: .08em .12em 0 0; }
.demo[data-about="stack"] .demo-about .demo-wrap { grid-template-columns: 1fr; }
.demo[data-about="stack"] .demo-h2 { font-size: calc(var(--h2) * 1.6); }
.demo[data-about="stack"] .demo-facts { grid-template-columns: repeat(3, 1fr); gap: calc(var(--u) * .5); }
.demo[data-about="stack"] .demo-facts div { border: 0; padding: calc(var(--u) * 1.2); background: var(--d-surface); }

/* ---------- quote ---------- */
.demo-quote { margin: 0; padding: calc(var(--u) * 3.5) 0; }
.demo-quote p { font-family: var(--d-font-display); font-weight: var(--d-weight); font-size: calc(1.6rem * var(--d-scale)); letter-spacing: var(--d-track); line-height: 1.25; max-width: 30ch; }
.demo-quote footer { margin-top: calc(var(--u) * 1.4); display: grid; gap: .1rem; font-size: .85rem; color: var(--d-soft); }
.demo-quote footer b { color: var(--d-ink); font-weight: 600; }
.demo[data-quote="large"] .demo-quote { text-align: center; }
.demo[data-quote="large"] .demo-quote p { margin-inline: auto; font-size: calc(2.1rem * var(--d-scale)); font-style: italic; }
.demo[data-quote="boxed"] .demo-quote { border: var(--d-line-w) solid var(--d-line); padding: calc(var(--u) * 2); }
.demo[data-quote="boxed"] .demo-quote p::before { content: "“"; color: var(--d-accent); }
.demo[data-quote="card"] .demo-quote { border: 1px solid var(--d-line); border-radius: var(--d-radius); padding: calc(var(--u) * 2); background: var(--d-surface); }
.demo[data-quote="pull"] .demo-quote { border-top: var(--d-line-w) solid var(--d-ink); border-bottom: var(--d-line-w) solid var(--d-ink); }
.demo[data-quote="pull"] .demo-quote p { font-size: calc(2.3rem * var(--d-scale)); }
.demo[data-quote="shout"] .demo-quote p { font-size: calc(2.6rem * var(--d-scale)); text-transform: uppercase; color: var(--d-accent-text); }

/* ---------- cta ---------- */
.demo-cta { padding: calc(var(--u) * 4.5) 0; border-top: var(--d-line-w) solid var(--d-line); }
.demo[data-cta="centered"] .demo-cta { text-align: center; }
.demo[data-cta="centered"] .demo-cta .demo-h2, .demo[data-cta="centered"] .demo-lead { margin-inline: auto; }
.demo[data-cta="centered"] .demo-actions { justify-content: center; }
.demo[data-cta="bar"] .demo-cta { background: var(--d-ink); color: var(--d-bg); }
.demo[data-cta="bar"] .demo-cta .demo-lead { color: var(--d-bg); opacity: .75; }
.demo[data-cta="bar"] .demo-cta .demo-btn--primary { background: var(--d-accent); border-color: var(--d-accent); color: var(--d-on-accent); }
.demo[data-cta="bar"] .demo-cta .demo-btn--secondary { color: var(--d-bg); border-color: var(--d-bg); }
.demo[data-cta="panel"] .demo-cta .demo-wrap { border: 1px solid var(--d-line); border-radius: var(--d-radius); padding: calc(var(--u) * 2.4); background: var(--d-surface); }
.demo[data-cta="panel"] .demo-cta .demo-btn--primary { background: var(--d-accent); border-color: var(--d-accent); color: var(--d-on-accent); }
.demo[data-cta="rule"] .demo-cta { border-top-width: calc(var(--d-line-w) * 3); border-top-color: var(--d-ink); }
.demo[data-cta="block"] .demo-cta { border: 0; background: var(--d-accent); color: var(--d-on-accent); }
.demo[data-cta="block"] .demo-cta .demo-h2 { font-size: calc(var(--h2) * 1.8); }
.demo[data-cta="block"] .demo-cta .demo-lead { color: var(--d-on-accent); }
.demo[data-cta="block"] .demo-cta .demo-btn--primary { background: var(--d-on-accent); border-color: var(--d-on-accent); color: var(--d-accent); }
.demo[data-cta="block"] .demo-cta .demo-btn--secondary { color: var(--d-on-accent); border-color: var(--d-on-accent); }

/* ---------- footer ---------- */
.demo-footer { padding: calc(var(--u) * 3) 0 calc(var(--u) * 2); border-top: var(--d-line-w) solid var(--d-line); font-size: .85rem; }
.demo-footer .demo-wrap { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: calc(var(--u) * 2); }
.demo-footer__brand p { color: var(--d-soft); margin-top: .3rem; }
.demo-footer__col { display: grid; gap: .4rem; align-content: start; color: var(--d-soft); }
.demo-footer__legal { grid-column: 1 / -1; margin-top: calc(var(--u) * 1.5); padding-top: calc(var(--u) * 1); border-top: 1px solid var(--d-line); font-size: .74rem; color: var(--d-soft); }
.demo[data-footer="thin"] .demo-footer { padding-top: calc(var(--u) * 2); }
.demo[data-footer="centered"] .demo-footer .demo-wrap { grid-template-columns: repeat(3, auto); justify-content: center; text-align: center; }
.demo[data-footer="centered"] .demo-footer__brand { grid-column: 1 / -1; }
.demo[data-footer="grid"] .demo-footer { padding: 0; }
.demo[data-footer="grid"] .demo-footer .demo-wrap { width: 100%; gap: 0; }
.demo[data-footer="grid"] .demo-footer .demo-wrap > * { padding: calc(var(--u) * 1.6); border-right: var(--d-line-w) solid var(--d-line); }
.demo[data-footer="grid"] .demo-footer__legal { border-right: 0; border-top: var(--d-line-w) solid var(--d-line); margin: 0; }
.demo[data-footer="modules"] .demo-footer__col { padding: calc(var(--u) * .9); border: 1px solid var(--d-line); border-radius: var(--d-radius); }
.demo[data-footer="loud"] .demo-footer__brand b { font-size: calc(2.4rem * var(--d-scale)); text-transform: uppercase; letter-spacing: var(--d-track); }

/* ---------- grid modes: hairlines behind the content ---------- */
.demo[data-grid="structured"] [data-sec] .demo-wrap { box-shadow: inset 1px 0 0 var(--d-line), inset -1px 0 0 var(--d-line); }
.demo[data-grid="modular"] { background-image: linear-gradient(var(--d-line) 1px, transparent 1px), linear-gradient(90deg, var(--d-line) 1px, transparent 1px); background-size: 48px 48px; background-blend-mode: normal; }
.demo[data-grid="modular"] [data-sec] { position: relative; }

/* ---------- the demo responds to its own frame, not the viewport ---------- */
@container (max-width: 760px) {
  .demo-hero .demo-wrap, .demo[data-hero="asym"] .demo-hero .demo-wrap { grid-template-columns: 1fr; }
  .demo-hero__visual, .demo[data-hero="asym"] .demo-hero__visual { grid-row: auto; grid-column: 1; padding-top: 0; margin-top: calc(var(--u) * 1.5); }
  .demo[data-hero="modules"] .demo-hero__spec { grid-column: 1; }
  .demo[data-hero="grid"] .demo-hero__visual { border-left: 0; border-top: var(--d-line-w) solid var(--d-line); }
  .demo-nav .demo-wrap { flex-wrap: wrap; gap: calc(var(--u) * .8); }
  .demo-nav__links { order: 3; width: 100%; flex-wrap: wrap; gap: calc(var(--u) * .8); }
  .demo-nav__meta { display: none; }
  .demo[data-nav="bar"] .demo-nav .demo-wrap > * { border-right: 0; }
  .demo[data-nav="bar"] .demo-nav__links a { flex: 1; text-align: center; border-right: 0; border-top: var(--d-line-w) solid var(--d-line); }
  .demo-proof .demo-wrap, .demo[data-proof="table"] .demo-proof .demo-wrap { grid-template-columns: 1fr; gap: calc(var(--u) * 1.2); }
  .demo-stats, .demo[data-proof="table"] .demo-stats { flex-wrap: wrap; gap: calc(var(--u) * 1.4); }
  .demo[data-proof="blocks"] .demo-stats { flex-direction: column; }
  .demo-cards, .demo[data-cards="cells"] .demo-cards, .demo-objects, .demo[data-showcase="offset"] .demo-objects { grid-template-columns: 1fr; }
  .demo[data-cards="list"] .demo-card { grid-template-columns: 1fr; gap: calc(var(--u) * .4); }
  .demo[data-cards="cells"] .demo-card { border-right: 0; border-bottom: var(--d-line-w) solid var(--d-line); }
  .demo[data-cards="cells"] .demo-card:last-child { border-bottom: 0; }
  .demo[data-showcase="single"] .demo-object { grid-template-columns: 1fr; }
  .demo[data-showcase="single"] .demo-object:nth-child(even) .demo-art { order: 0; }
  .demo[data-showcase="offset"] .demo-object:nth-child(2), .demo[data-showcase="offset"] .demo-object:nth-child(3) { margin-top: 0; }
  .demo[data-showcase="grid"] .demo-object { border-right: 0; border-bottom: var(--d-line-w) solid var(--d-line); }
  .demo-about .demo-wrap, .demo[data-about="essay"] .demo-about .demo-wrap, .demo[data-about="split"] .demo-about .demo-wrap { grid-template-columns: 1fr; }
  .demo[data-about="essay"] .demo-about__text, .demo[data-about="essay"] .demo-facts { grid-column: 1; grid-row: auto; }
  .demo[data-about="centered"] .demo-facts, .demo[data-about="stack"] .demo-facts { grid-template-columns: 1fr; gap: calc(var(--u) * .6); }
  .demo[data-about="split"] .demo-about__text { border-right: 0; }
  .demo-footer .demo-wrap, .demo[data-footer="centered"] .demo-footer .demo-wrap, .demo[data-footer="grid"] .demo-footer .demo-wrap { grid-template-columns: 1fr 1fr; }
  .demo-footer__brand, .demo[data-footer="centered"] .demo-footer__brand { grid-column: 1 / -1; }
  .demo-h1, .demo[data-hero="stage"] .demo-h1, .demo[data-hero="asym"] .demo-h1 { font-size: calc(var(--h1) * .78); max-width: none; }
  .demo[data-hero="wall"] .demo-h1 { font-size: calc(var(--h1) * 1.25); }
  .demo-h2 { font-size: calc(var(--h2) * .85); }
  .demo-hero { padding: calc(var(--u) * 3) 0 calc(var(--u) * 3); }
  .demo[data-nav="loud"] .demo-brand { font-size: calc(1.4rem * var(--d-scale)); }
  .demo[data-nav="masthead"] .demo-brand { font-size: calc(1.9rem * var(--d-scale)); }
  .demo[data-nav="centered"] .demo-brand { font-size: calc(1.5rem * var(--d-scale)); }
}