/* t1-about.css · written by components/tau/t1-extract.mjs from components/reference/tau/about/: the stylesheet the proposals 01, 02, 03, 04, 05, 06 share */
/* Six proposals for the Tau about page, one at a time, on Tau's own tokens. */
:root {
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --page: #fcfcfb; --ground: #f1f0ed; --raised: #ffffff; --ink: #0b0b0b; --ink2: #52514e; --ink3: #6c6b69; --faded: #97958d;
  --line: rgb(11 11 11 / 10%); --line-strong: rgb(11 11 11 / 20%);
  --glass: rgb(255 255 255 / 78%); --accent: #6250d6;
  --e1: 0 3px 6px -2px rgb(0 0 0 / .02), 0 1px 1px rgb(0 0 0 / .04);
  --e2: 0 0 0 .5px rgb(0 0 0 / .06), 0 6px 18px rgb(0 0 0 / .05), 0 3px 9px rgb(0 0 0 / .06), 0 1px 1px rgb(0 0 0 / .04);
  --e3: 0 0 0 .5px rgb(0 0 0 / .06), 0 24px 64px rgb(0 0 0 / .16), 0 8px 24px rgb(0 0 0 / .10), 0 1px 1px rgb(0 0 0 / .04);
  --m: clamp(16px, 2.8vw, 40px);
  --statement: clamp(38px, 6.4vw, 96px);
  --tau-ease: linear(0, 0.0234 0.39%, 0.0740 1.28%, 0.1420 2.54%, 0.2210 4.15%, 0.3058 6.06%, 0.3921 8.27%, 0.4764 10.75%, 0.5561 13.48%, 0.6294 16.47%, 0.6951 19.70%, 0.7528 23.17%, 0.8025 26.86%, 0.8443 30.78%, 0.8791 34.91%, 0.9074 39.26%, 0.9301 43.81%, 0.9481 48.56%, 0.9621 53.52%, 0.9728 58.67%, 0.9810 64.02%, 0.9870 69.55%, 0.9915 75.28%, 0.9948 81.19%, 0.9972 87.28%, 0.9988 93.55%, 1);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  color-scheme: dark; --page: #0d0d0d; --ground: #161615; --raised: #1f1f1e; --ink: #f0efec; --ink2: #c3c2b7; --ink3: #8f8e89; --faded: #5f5e5a;
  --line: rgb(255 255 255 / 10%); --line-strong: rgb(255 255 255 / 20%); --glass: rgb(40 40 40 / 75%);
  --e2: 0 0 0 .5px rgb(255 255 255 / 8%), 0 6px 18px rgb(0 0 0 / .4), 0 1px 1px rgb(0 0 0 / .3);
  --e3: 0 0 0 .5px rgb(255 255 255 / 9%), 0 24px 64px rgb(0 0 0 / .6), 0 8px 24px rgb(0 0 0 / .4); } }
:root[data-theme="dark"] {
  color-scheme: dark; --page: #0d0d0d; --ground: #161615; --raised: #1f1f1e; --ink: #f0efec; --ink2: #c3c2b7; --ink3: #8f8e89; --faded: #5f5e5a;
  --line: rgb(255 255 255 / 10%); --line-strong: rgb(255 255 255 / 20%); --glass: rgb(40 40 40 / 75%);
  --e2: 0 0 0 .5px rgb(255 255 255 / 8%), 0 6px 18px rgb(0 0 0 / .4), 0 1px 1px rgb(0 0 0 / .3);
  --e3: 0 0 0 .5px rgb(255 255 255 / 9%), 0 24px 64px rgb(0 0 0 / .6), 0 8px 24px rgb(0 0 0 / .4); }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--page); color: var(--ink); }
body { font: 400 15px/24px var(--font); letter-spacing: -0.011em; -webkit-font-smoothing: antialiased; font-feature-settings: "ss01", "cv01", "cv11"; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }

/* the bar, as on the site */
.bar { position: fixed; z-index: 50; top: calc(12px + env(safe-area-inset-top, 0px)); left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 4px; height: 48px; padding: 0 4px 0 14px;
  border-radius: 9999px; background: var(--glass); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); box-shadow: 0 0 0 .5px var(--line), var(--e2); font-size: 13px; white-space: nowrap; }
.bar b { font-weight: 550; font-size: 14px; margin-right: 12px; }
.bar span { padding: 0 10px; color: var(--ink2); }
.bar i { font-style: normal; margin-left: 8px; height: 36px; padding: 0 16px; display: flex; align-items: center; border-radius: 9999px; background: var(--ink); color: var(--page); }
@media (max-width: 720px) { .bar span { display: none; } }

/* the switcher between the proposals */
.pick { position: fixed; z-index: 60; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; width: min(560px, calc(100% - 32px)); }
.pick-note { margin: 0; padding: 8px 14px; border-radius: 10px; background: var(--glass); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); box-shadow: 0 0 0 .5px var(--line), var(--e2);
  font-size: 13px; line-height: 19px; color: var(--ink2); text-align: center; }
.pick-dock { display: flex; gap: 2px; padding: 4px; border-radius: 9999px; background: var(--glass); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); box-shadow: 0 0 0 .5px var(--line), var(--e2); }
.pick-dock button { height: 36px; padding: 0 14px; border: 0; border-radius: 9999px; background: none; font: 500 13px/1 var(--font); color: var(--ink3); cursor: pointer; }
.pick-dock button[aria-pressed="true"] { background: color-mix(in srgb, var(--ink) 12%, transparent); color: var(--ink); }
.pick-dock button:focus-visible { outline: 1.5px solid var(--accent); outline-offset: 2px; }

.next { padding: 120px var(--m) 200px; }
.next h2 { margin: 0 0 24px; font: 450 clamp(28px, 3.1vw, 48px)/1.06 var(--font); letter-spacing: -0.026em; }
.next p { margin: 0; max-width: 40em; color: var(--ink2); }
.small { font-size: 13px; line-height: 20px; color: var(--ink3); }



.bud { position: relative; min-height: 100vh; }
.wrap { padding-left: var(--m); padding-right: var(--m); }
.eyebrow { margin: 0; font: 500 12px/16px ui-monospace, "SF Mono", Menlo, monospace; color: var(--ink3); }
.t-big { margin: 0; font: 450 clamp(46px, 6.2vw, 104px)/.98 var(--font); letter-spacing: -0.045em; }
.t-mid { margin: 0; font: 450 clamp(32px, 3.6vw, 56px)/1.04 var(--font); letter-spacing: -0.032em; }
.lede { margin: 0; max-width: 34em; font-size: clamp(17px, 1.35vw, 20px); line-height: 1.5; color: var(--ink2); }
.small { margin: 0; font-size: 13px; line-height: 20px; color: var(--ink3); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 44px; padding: 0 20px; border: 0; border-radius: 9999px; background: var(--ink); color: var(--page); font: 500 15px/1 var(--font); cursor: pointer; white-space: nowrap; }
.btn.is-quiet { background: color-mix(in srgb, var(--ink) 8%, transparent); color: var(--ink); }
.btn.is-small { height: 34px; padding: 0 14px; font-size: 13px; }
.btn:focus-visible, .thing:focus-visible, [tabindex]:focus-visible { outline: 1.5px solid var(--accent); outline-offset: 3px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.thing { position: absolute; left: 0; top: 0; touch-action: none; -webkit-user-select: none; user-select: none; cursor: grab; will-change: transform; }
.thing.is-held { cursor: grabbing; }
img { -webkit-user-drag: none; }
.facts { margin: 0; }
.facts div { display: flex; justify-content: space-between; gap: 16px; padding: 7px 0; border-bottom: .5px solid var(--line-strong); font-size: 13px; line-height: 20px; }
.facts div:first-child { border-top: .5px solid var(--line-strong); }
.facts dt { color: var(--ink3); }
.facts dd { margin: 0; text-align: right; }

/* the rest of the page, the same under every proposal */
.rest { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 96px); padding-top: clamp(80px, 9vw, 140px); padding-bottom: 220px; border-top: .5px solid var(--line); }
.rest h2 { margin: 0 0 28px; font: 450 clamp(26px, 2.4vw, 36px)/1.1 var(--font); letter-spacing: -0.026em; }
.rest ol { margin: 0; padding: 0; list-style: none; }
.rest li { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 4px 12px; padding: 16px 0; border-top: .5px solid var(--line-strong); }
.rest li span { font: 500 12px/22px ui-monospace, "SF Mono", Menlo, monospace; color: var(--ink3); }
.rest li b { font-weight: 500; }
.rest li p { grid-column: 2; margin: 0; color: var(--ink2); }
.rest .site p { margin: 0 0 16px; color: var(--ink2); }
@media (max-width: 900px) { .rest { grid-template-columns: 1fr; } }

.pick-dock { flex-wrap: wrap; justify-content: center; border-radius: 22px; }
@media (max-width: 720px) { .pick-dock button { padding: 0 10px; } }

/* 1. the x-ray */
.xr { position: relative; }
.xr-in { padding: 112px var(--m) 40px; }
.xr-page { position: relative; }
.xr-h { margin: 18px 0 0; max-width: 11.5em; font: 450 clamp(46px, 6.4vw, 108px)/.98 var(--font); letter-spacing: -0.045em; }
.xr-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 3fr) minmax(0, 4fr); gap: clamp(20px, 3vw, 48px); margin-top: clamp(32px, 4vw, 64px); align-items: start; }
.xr-body p { margin: 0 0 16px; font-size: clamp(16px, 1.25vw, 19px); line-height: 1.55; color: var(--ink2); }
.xr-side { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; }
.xr-side .facts { align-self: stretch; }
.xr-fig { margin: 0; }
.xr-fig img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: top; border-radius: 12px; box-shadow: var(--e2); background: var(--ground); }
.xr-fig figcaption { margin-top: 10px; font-size: 13px; line-height: 20px; color: var(--ink3); }
.xr-spec { position: absolute; inset: 0; pointer-events: none; background-color: color-mix(in srgb, var(--accent) 7%, var(--page));
  background-image: linear-gradient(color-mix(in srgb, var(--accent) 14%, transparent) .5px, transparent .5px), linear-gradient(90deg, color-mix(in srgb, var(--accent) 14%, transparent) .5px, transparent .5px);
  background-size: 8px 8px; clip-path: circle(var(--r, 150px) at var(--x, 50%) var(--y, 50%)); }
.xr-spec .xr-in { color: color-mix(in srgb, var(--accent) 80%, var(--ink)); }
.xr-spec .xr-in * { color: inherit !important; }
.xr-spec .xr-h { color: transparent !important; -webkit-text-stroke: 1.2px var(--accent); }
.xr-spec [data-spec] { outline: 1px dashed color-mix(in srgb, var(--accent) 70%, transparent); outline-offset: 0; }
.xr-spec .xr-fig img { opacity: .18; filter: grayscale(1); box-shadow: none; }
.xr-spec .btn { background: none; box-shadow: inset 0 0 0 1px var(--accent); }
.xr-spec .facts div { border-color: color-mix(in srgb, var(--accent) 50%, transparent); }
.xr-note { position: absolute; left: 0; top: 0; display: flex; align-items: center; gap: 6px; height: 20px; padding: 0 7px; border-radius: 4px; background: var(--accent); color: #fff; font: 500 11px/20px ui-monospace, "SF Mono", Menlo, monospace; white-space: nowrap; }
.xr-note i { width: 9px; height: 9px; border-radius: 2px; box-shadow: 0 0 0 1px rgb(255 255 255 / 60%); }
.xr-gap { position: absolute; left: 0; top: 0; border-left: 1px solid var(--accent); }
.xr-gap::before, .xr-gap::after { content: ""; position: absolute; left: -4px; width: 7px; border-top: 1px solid var(--accent); }
.xr-gap::before { top: 0; } .xr-gap::after { bottom: 0; }
.xr-gap span { position: absolute; left: 6px; top: 50%; transform: translateY(-50%); font: 500 11px/1 ui-monospace, "SF Mono", Menlo, monospace; color: var(--accent); white-space: nowrap; }
.xr-gap.is-h { border-left: 0; border-top: 1px solid var(--accent); }
.xr-gap.is-h::before, .xr-gap.is-h::after { top: -4px; bottom: auto; width: 0; height: 7px; border-top: 0; border-left: 1px solid var(--accent); left: 0; }
.xr-gap.is-h::after { left: auto; right: 0; }
.xr-gap.is-h span { left: 50%; top: -14px; transform: translateX(-50%); }
.xr-lens { width: var(--d); height: var(--d); border-radius: 50%; z-index: 20; box-shadow: 0 0 0 1px var(--accent), 0 0 0 6px color-mix(in srgb, var(--accent) 12%, transparent), var(--e3); }
.xr-lens span { position: absolute; left: 50%; bottom: -34px; transform: translateX(-50%); height: 24px; padding: 0 10px; border-radius: 9999px; background: var(--ink); color: var(--page); font: 500 12px/24px var(--font); white-space: nowrap; transition: opacity .3s var(--tau-ease); }
.xr-lens.is-held span, .xr.is-whole .xr-lens span { opacity: 0; }
.xr.is-whole .xr-lens { box-shadow: none; }
.xr-foot { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-top: 8px; }

/* 2. the dividing line */
.sp { position: relative; height: max(720px, 100vh); overflow: hidden; touch-action: pan-y; }
.sp-w { position: absolute; inset: 0; padding: 112px var(--m) 72px; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); grid-template-rows: auto 1fr; gap: 0 clamp(24px, 4vw, 72px); }
.sp-a { background: var(--page); color: var(--ink); clip-path: inset(0 calc((1 - var(--p)) * 100%) 0 0); }
.sp-b { --ink: #f0efec; --ink2: #c3c2b7; --ink3: #8f8e89; --line-strong: rgb(255 255 255 / 20%); background: #0d0d0d; color: var(--ink); clip-path: inset(0 0 0 calc(var(--p) * 100%)); }
.sp-top { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 14px; }
.sp-top .t-big { max-width: 9em; }
.sp-b .sp-top { align-items: flex-end; text-align: right; }
.sp-b .sp-left { grid-column: 2; grid-row: 2; justify-self: end; width: 100%; max-width: 560px; }
.sp-b .sp-pics { grid-column: 1; grid-row: 2; }
.sp-b .sp-left .lede { margin-left: auto; text-align: right; }
.sp-b { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.sp-left { align-self: end; display: flex; flex-direction: column; gap: 22px; }
.sp-left .lede { max-width: 26em; }
.sp-list { margin: 0; padding: 0; list-style: none; }
.sp-list li { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-top: .5px solid var(--line-strong); font-size: 15px; }
.sp-list li span { color: var(--ink3); font-size: 13px; }
.sp-pics { align-self: end; display: grid; grid-template-columns: 1.25fr 1fr; gap: 16px; align-items: end; }
.sp-pics figure { margin: 0; }
.sp-pics img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: top; border-radius: 10px; box-shadow: var(--e2); }
.sp-pics figure:last-child img { aspect-ratio: 4 / 5; }
.sp-pics figcaption { margin-top: 8px; font-size: 12px; line-height: 16px; color: var(--ink3); }
.sp-line { position: absolute; z-index: 5; top: 0; bottom: 0; left: 0; width: 1px; background: var(--accent); transform: translateX(calc(var(--p) * var(--w) - .5px)); }
.sp-knob { position: absolute; left: 50%; top: 50%; width: 52px; height: 52px; margin: -26px 0 0 -26px; display: grid; place-items: center; border: 0; border-radius: 50%; background: var(--accent); color: #fff; cursor: grab; touch-action: none; box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent), var(--e2); }
.sp-knob svg { width: 22px; height: 22px; }
.sp.is-held .sp-knob { cursor: grabbing; }
.sp-mid { position: absolute; z-index: 6; top: 0; left: 0; width: 248px; padding: 10px 10px 14px; border-radius: 14px; background: var(--raised); color: var(--ink); box-shadow: var(--e3); pointer-events: none; opacity: 0; }
.sp-mid img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; border-radius: 6px; }
.sp-mid b { display: block; margin: 12px 4px 4px; font: 500 15px/20px var(--font); }
.sp-mid p { margin: 0 4px; font-size: 13px; line-height: 19px; color: var(--ink2); }
.sp-head { position: absolute; z-index: 4; left: var(--m); right: var(--m); top: 76px; display: flex; justify-content: space-between; color: #fff; mix-blend-mode: difference; pointer-events: none; font: 500 12px/16px ui-monospace, "SF Mono", Menlo, monospace; }
@media (max-width: 900px) { .xr-grid { grid-template-columns: 1fr; } .xr-fig { max-width: 420px; } }
@media (max-width: 720px) {
  .sp { height: 1180px; }
  .sp-head { top: 72px; font-size: 11px; line-height: 15px; }
  .sp-head span:last-child { display: none; }
  .sp-w { padding-top: 132px !important; }
  .sp-w { grid-template-columns: 1fr; grid-template-rows: auto auto auto; gap: 24px; padding-top: 100px; }
  .sp-b { grid-template-columns: 1fr; align-content: end; padding-bottom: 120px; }
  .sp-b .sp-pics { grid-row: 1; grid-column: 1; }
  .sp-b .sp-left { grid-row: 2; grid-column: 1; max-width: none; }
  .sp-b .sp-top { grid-row: 3; grid-column: 1; }
  .sp-a { clip-path: inset(0 0 calc((1 - var(--p)) * 100%) 0); }
  .sp-b { clip-path: inset(calc(var(--p) * 100%) 0 0 0); }
  .sp-line { left: 0; right: 0; top: 0; bottom: auto; width: auto; height: 1px; transform: translateY(calc(var(--p) * var(--h) - .5px)); }
  .sp-knob svg { transform: rotate(90deg); }
  .sp-mid { width: 220px; }
}

/* 3. the manuscript */
.ms { padding-top: 112px; }
.ms-head { display: flex; flex-direction: column; gap: 14px; max-width: 760px; }
.ms-rule { position: relative; height: 64px; margin: 36px 0 28px; touch-action: none; cursor: pointer; -webkit-user-select: none; user-select: none; }
.ms-track { position: absolute; left: 0; right: 0; top: 20px; height: 1px; background: var(--line-strong); }
.ms-fill { position: absolute; left: 0; top: 20px; height: 2px; margin-top: -.5px; background: var(--accent); transform-origin: left; }
.ms-tick { position: absolute; top: 14px; width: 1px; height: 13px; background: var(--ink3); }
.ms-tick span { position: absolute; top: 22px; left: 0; transform: translateX(-50%); font-size: 12px; line-height: 16px; color: var(--ink3); white-space: nowrap; transition: color .2s; }
.ms-tick.is-first span { transform: none; } .ms-tick.is-last span { transform: translateX(-100%); }
.ms-tick.is-on span { color: var(--ink); }
.ms-knob { position: absolute; top: 20px; left: 0; width: 22px; height: 22px; margin: -11px 0 0 -11px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 18%, transparent); cursor: grab; }
.ms-rule.is-held .ms-knob { cursor: grabbing; }
.ms-sheet { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: clamp(24px, 4vw, 64px); }
.ms-paper { position: relative; padding: clamp(28px, 4vw, 64px); border-radius: 4px; background: var(--raised); box-shadow: 0 0 0 .5px var(--line), 0 24px 60px rgb(0 0 0 / .07), 0 4px 12px rgb(0 0 0 / .04); }
.ms-text, .ms-clean { font: 450 clamp(22px, 2.3vw, 36px)/1.38 var(--font); letter-spacing: -0.022em; color: var(--ink); }
.ms-text p, .ms-clean p { margin: 0 0 .6em; } .ms-text p:last-child, .ms-clean p:last-child { margin: 0; }
.ms-old { color: var(--ink3); background-image: linear-gradient(var(--accent), var(--accent)); background-repeat: no-repeat; background-position: 0 58%; background-size: calc(var(--s, 0) * 100%) 2px; }
.ms-new { color: var(--accent); }
.ms-new::before { content: "⁁"; display: inline-block; margin: 0 .08em 0 .12em; font-size: .7em; vertical-align: -.1em; }
.ms-clean { position: absolute; inset: 0; padding: inherit; border-radius: inherit; background: var(--raised); opacity: 0; pointer-events: none; }
.ms-notes { position: relative; }
.ms-note { position: absolute; left: 0; right: 0; display: grid; grid-template-columns: 22px 1fr; gap: 10px; font-size: 13px; line-height: 19px; color: var(--ink3); transition: color .25s, opacity .25s; }
.ms-note i { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font: 500 11px/1 var(--font); font-style: normal; color: var(--ink3); box-shadow: inset 0 0 0 1px var(--line-strong); transition: background-color .25s, color .25s; }
.ms-note.is-done { color: var(--ink2); }
.ms-note.is-done i { background: var(--accent); color: #fff; box-shadow: none; }
.ms-foot { display: flex; gap: 10px; align-items: center; margin-top: 24px; }
@media (max-width: 900px) { .ms-sheet { grid-template-columns: 1fr; } .ms-notes { display: none; } }

/* 4. the full stop */
.bud[data-bud="stop"] { padding: 0; }
.fs { position: relative; height: 100vh; min-height: 600px; overflow: hidden; touch-action: none; cursor: zoom-in; -webkit-user-select: none; user-select: none; outline: none; }
.fs-lv { position: absolute; left: 0; top: 0; width: var(--W); height: var(--H); transform-origin: 0 0; display: flex; align-items: center; justify-content: center; padding: 0 clamp(20px, 8vw, 160px); will-change: transform, opacity; }
.fs-in { display: flex; flex-direction: column; align-items: center; gap: 28px; text-align: center; }
.fs-t { margin: 0; max-width: 15em; font: 450 var(--fsz)/1.04 var(--font); letter-spacing: -0.04em; text-wrap: balance; }
.fs-t .fs-p { display: inline-block; width: .19em; height: .19em; margin-left: .03em; vertical-align: 0; visibility: hidden; }
.fs-x { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; font-size: 14px; }
.fs-x span { padding: 6px 12px; border-radius: 9999px; box-shadow: inset 0 0 0 1px currentColor; opacity: .8; }
.fs-x img { width: 260px; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; border-radius: 8px; box-shadow: 0 10px 30px rgb(0 0 0 / .25); }
.fs-x .btn { pointer-events: auto; }
.fs-dot { position: absolute; left: 0; top: 0; border-radius: 50%; will-change: transform; pointer-events: none; }
.fs-nav { position: absolute; z-index: 10; right: var(--m); top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 10px; mix-blend-mode: difference; }
.fs-nav button { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: #fff; opacity: .35; cursor: pointer; transition: opacity .2s, transform .3s var(--tau-ease); }
.fs-nav button[aria-current="true"] { opacity: 1; transform: scale(1.3); }
.fs-hint { position: absolute; z-index: 10; left: var(--m); bottom: 28px; margin: 0; color: #fff; mix-blend-mode: difference; font-size: 13px; opacity: .8; }

/* 5. the pinboard */
.pb { position: relative; height: max(860px, 100vh); overflow: hidden; }
.pb-head { position: absolute; z-index: 2; left: var(--m); top: 112px; display: flex; flex-direction: column; gap: 16px; max-width: min(460px, 34vw); pointer-events: none; }
.pb svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; z-index: 1; }
.pb-th { fill: none; stroke: var(--accent); stroke-width: 1; opacity: .45; transition: opacity .25s, stroke-width .25s; }
.pb.is-focus .pb-th { opacity: .1; }
.pb.is-focus .pb-th.is-on { opacity: 1; stroke-width: 1.5; }
.pb-lab { font: 500 11px/1 var(--font); fill: var(--accent); paint-order: stroke; stroke: var(--page); stroke-width: 4px; stroke-linejoin: round; opacity: 0; transition: opacity .25s; }
.pb.is-focus .pb-lab.is-on, .pb.is-labels .pb-lab { opacity: 1; }
.pb.is-labels.is-focus .pb-lab:not(.is-on) { opacity: .15; }
.pb-card { z-index: 3; width: var(--cw); padding: 12px 12px 13px; border-radius: 10px; background: var(--raised); box-shadow: var(--e2); transition: box-shadow .3s var(--tau-ease), opacity .25s; }
.pb-card.is-held { box-shadow: var(--e3); }
.pb.is-focus .pb-card:not(.is-on) { opacity: .45; }
.pb-card::before { content: ""; position: absolute; left: 50%; top: -5px; width: 10px; height: 10px; margin-left: -5px; border-radius: 50%; background: var(--accent); box-shadow: 0 1px 2px rgb(0 0 0 / .3), inset 0 -2px 0 rgb(0 0 0 / .18); }
.pb-card small { display: block; font: 500 10px/14px ui-monospace, "SF Mono", Menlo, monospace; text-transform: uppercase; letter-spacing: .04em; color: var(--ink3); }
.pb-card b { display: block; margin: 4px 0 4px; font: 500 15px/19px var(--font); letter-spacing: -0.01em; }
.pb-card p { margin: 0; font-size: 12px; line-height: 17px; color: var(--ink2); }
.pb-card img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; margin-bottom: 10px; border-radius: 5px; background: var(--ground); pointer-events: none; }
.pb-card.is-me { background: var(--ink); color: var(--page); }
.pb-card.is-me small, .pb-card.is-me p { color: color-mix(in srgb, var(--page) 70%, transparent); }
.pb-card.is-me b { font-size: 19px; line-height: 23px; }
.pb-head .row { pointer-events: auto; margin-top: 4px; }
@media (max-width: 720px) { .pb { height: 1460px; } .pb-head { max-width: none; right: var(--m); top: 96px; } }

/* 6. two vocabularies */
.tv { padding-top: 112px; }
.tv-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 24px; }
.tv-head > div:first-child { display: flex; flex-direction: column; gap: 16px; max-width: 760px; }
.tv-seg { display: flex; padding: 4px; border-radius: 9999px; background: color-mix(in srgb, var(--ink) 7%, transparent); }
.tv-seg button { height: 36px; padding: 0 18px; border: 0; border-radius: 9999px; background: none; font: 500 14px/1 var(--font); color: var(--ink3); cursor: pointer; transition: background-color .25s var(--tau-ease), color .25s var(--tau-ease); }
.tv-seg button[aria-pressed="true"] { background: var(--ink); color: var(--page); }
.tv-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 40px; perspective: 1600px; }
.tv-card { position: relative; height: 330px; transform-style: preserve-3d; cursor: grab; touch-action: pan-y; -webkit-user-select: none; user-select: none; will-change: transform; }
.tv-card.is-held { cursor: grabbing; }
.tv-face { position: absolute; inset: 0; display: flex; flex-direction: column; padding: 22px 24px; border-radius: 14px; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.tv-face.is-a { background: var(--raised); color: var(--ink); box-shadow: var(--e2); }
.tv-face.is-b { --ink: #f0efec; --ink2: #c3c2b7; --ink3: #8f8e89; background: #151515; color: var(--ink); transform: rotateY(180deg); box-shadow: 0 0 0 .5px rgb(255 255 255 / 8%), var(--e2); }
.tv-face small { display: flex; justify-content: space-between; font: 500 11px/16px ui-monospace, "SF Mono", Menlo, monospace; color: var(--ink3); }
.tv-face small i { font-style: normal; color: var(--accent); }
.tv-face.is-b small i { color: #a99cf0; }
.tv-face h3 { margin: auto 0 14px; font: 450 clamp(40px, 3.6vw, 60px)/1 var(--font); letter-spacing: -0.04em; }
.tv-face p { margin: 0; min-height: 4.6em; font-size: 15px; line-height: 1.5; color: var(--ink2); }
.tv-face em { display: block; margin-top: 14px; padding-top: 10px; border-top: .5px solid var(--line-strong); font: 400 12px/17px var(--font); font-style: normal; color: var(--ink3); }
.tv-face.is-b em { border-color: rgb(255 255 255 / 16%); }
.tv-hint { margin: 18px 0 0; }
@media (max-width: 1080px) { .tv-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .tv-grid { grid-template-columns: 1fr; } .tv-card { height: 300px; } }