/* Talking Tactile project website. The colors, fonts and sizes are the app's design tokens,
   in tokens.css (a byte for byte copy of apps/web/src/styles/tokens.css, loaded first).

   Fonts: tokens.css names them at /fonts/, the app's root. The site may be served from a
   subpath (GitHub Pages serves a project at /talking-tactile/), so the same faces are
   declared again here from assets/fonts/, relative to this file. A later @font-face with the
   same descriptors replaces the earlier one, so only these files are fetched. */
@font-face{
  font-family:"Literata";font-style:normal;font-weight:200 900;font-display:swap;
  src:url("fonts/literata-latin-opsz-normal.woff2") format("woff2-variations"),url("fonts/literata-latin-opsz-normal.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:"Atkinson Hyperlegible Next";font-style:normal;font-weight:200 800;font-display:swap;
  src:url("fonts/atkinson-hyperlegible-next-latin-wght-normal.woff2") format("woff2-variations"),url("fonts/atkinson-hyperlegible-next-latin-wght-normal.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

/* ---------- Base ---------- */
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
*,*::before,*::after{box-sizing:inherit}
html{scroll-behavior:smooth;scroll-padding-top:calc(env(safe-area-inset-top,0px) + 96px);-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--f-sans);font-size:1.125rem;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,canvas{max-width:100%;display:block}
[hidden]{display:none!important}
a{color:inherit}
h1,h2,h3{margin:0;font-weight:400}
p{margin:0}
:focus-visible{outline:var(--focus-width,3px) solid var(--focus);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:16px;top:-60px;z-index:100;padding:10px 16px;border-radius:var(--r-pill);background:var(--accent);color:var(--accent-ink);text-decoration:none;font-weight:600}
.skip:focus{top:calc(env(safe-area-inset-top,0px) + 12px)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- Background stage ---------- */
#field{position:fixed;top:0;left:0;z-index:0;pointer-events:none;max-width:none}
.veil{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:rgba(var(--veil),var(--veil-a,0));
}
.page{position:relative;z-index:2}

/* ---------- Liquid glass ---------- */
.glass{
  position:relative;isolation:isolate;
  background:linear-gradient(180deg,var(--glass-fill-2),var(--glass-fill) 60%);
  -webkit-backdrop-filter:blur(22px) saturate(160%);
  backdrop-filter:blur(22px) saturate(160%);
  border:1px solid var(--glass-edge);
  box-shadow:var(--glass-shadow), inset 0 1px 0 var(--glass-rim-a), inset 0 -1px 0 var(--glass-rim-b);
}
/* rim: a light-catching gradient border */
.glass::after{
  content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;
  background:linear-gradient(140deg,var(--glass-rim-a),transparent 32%,transparent 68%,var(--glass-rim-b));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
}
/* sheen that follows the pointer */
.glass::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:-1;
  background:radial-gradient(420px circle at var(--mx,20%) var(--my,-10%),var(--glass-sheen),transparent 60%);
  opacity:.9;transition:opacity .4s ease;
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass{background:var(--bg)}
}
@media (prefers-reduced-transparency: reduce){
  .glass{background:var(--bg);-webkit-backdrop-filter:none;backdrop-filter:none}
}

/* ---------- Header / nav ---------- */
.site-header{
  position:fixed;z-index:50;left:0;right:0;
  top:calc(env(safe-area-inset-top,0px) + 16px);
  display:flex;flex-direction:column;align-items:center;padding:0 16px;pointer-events:none;
}
.nav{
  pointer-events:auto;display:flex;align-items:center;gap:6px;
  padding:6px;border-radius:var(--r-pill);max-width:100%;
}
.brand{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 14px 0 12px;text-decoration:none;border-radius:var(--r-pill);font-weight:600;letter-spacing:.01em;white-space:nowrap}
.brand svg{width:22px;height:22px;flex:none}
.brand .logo-mark{width:33px;height:22px;flex:none}
.nav-links{display:flex;gap:2px;margin:0;padding:0;list-style:none}
.nav-links a{
  display:flex;align-items:center;min-height:44px;padding:0 15px;border-radius:var(--r-pill);text-decoration:none;font-size:.9375rem;color:var(--text-2);
  transition:background-color .2s ease,color .2s ease;
}
.nav-links a:hover,.nav-links a[aria-current="true"]{color:var(--text);background:var(--glass-fill-2)}
.nav-sep{width:1px;height:22px;background:var(--hair);margin:0 4px}
.icon-btn{
  display:grid;place-items:center;width:44px;height:44px;border-radius:var(--r-pill);
  border:0;background:transparent;color:var(--text);cursor:pointer;font:inherit;
  transition:background-color .2s ease;
}
.icon-btn:hover{background:var(--glass-fill-2)}
.icon-btn svg{width:18px;height:18px}
.menu-btn{display:none}
.menu{
  margin-top:10px;width:min(320px,calc(100vw - 32px));border-radius:var(--r-panel);padding:8px;display:none;pointer-events:auto;
  background:linear-gradient(180deg,var(--glass-fill-2),var(--menu-fill) 50%);
}
.menu.open{display:block}
.menu a{display:flex;align-items:center;min-height:44px;padding:0 16px;border-radius:var(--r-item);text-decoration:none}
.menu a:hover{background:var(--glass-fill-2)}
@media (max-width:760px){
  .nav-links,.nav-sep.wide{display:none}
  .menu-btn{display:grid}
}
@media (min-width:761px){.menu.open{display:none}}

/* ---------- Layout ---------- */
.wrap{width:min(var(--wrap),calc(100% - 40px));margin-inline:auto}
section{padding-block:clamp(72px,11vw,140px)}
.sec-head{max-width:40rem;margin-bottom:clamp(28px,4vw,44px)}
h2{font-family:var(--f-serif);font-size:clamp(2rem,4.2vw,3rem);line-height:1.1;letter-spacing:-.01em;font-variation-settings:"opsz" 60}
.sec-head p{margin-top:14px;color:var(--text-2);max-width:36rem}
.sec-head h2,.sec-head p{text-shadow:var(--tshadow)}

/* ---------- Hero ---------- */
.hero{
  min-height:100svh;display:grid;align-items:center;justify-items:end;position:relative;
  padding:calc(env(safe-area-inset-top,0px) + 104px) clamp(20px,6vw,104px) 72px;
}
.hero::before{ /* shade sits on the right, where the photo is already dark, so the face stays clear */
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(70% 85% at 100% 52%,rgba(var(--veil),var(--pool)) 0%,rgba(var(--veil),calc(var(--pool) * .72)) 42%,rgba(var(--veil),0) 100%);
}
.hero-inner{max-width:min(36rem,44vw);text-align:left}
h1{
  font-family:var(--f-serif);font-weight:350;font-variation-settings:"opsz" 72;
  font-size:clamp(2.3rem,4.1vw,3.9rem);line-height:1.05;letter-spacing:-.02em;text-wrap:balance;
  text-shadow:var(--tshadow);
}
.lead{margin-top:20px;max-width:34rem;text-shadow:var(--tshadow);font-size:clamp(1.0625rem,1.35vw,1.1875rem);color:var(--text-2);text-wrap:pretty}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 22px;border-radius:var(--r-pill);
  text-decoration:none;font-weight:600;font-size:1rem;transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.btn svg{width:18px;height:18px}
.btn-solid{background:var(--accent);color:var(--accent-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 30px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn-solid:hover{transform:translateY(-1px)}
.btn-glass:hover{transform:translateY(-1px)}
.hint{display:flex;align-items:flex-start;gap:8px;margin-top:22px;max-width:30rem;font-size:.875rem;color:var(--text-2);text-shadow:var(--tshadow)}
.hint svg{width:16px;height:16px;flex:none;margin-top:2px;color:var(--accent)}
.for-touch{display:none}
@media (hover:none){.for-touch{display:inline}.for-pointer{display:none}}
@media (max-width:560px){.hint{text-align:left}}
@media (max-width:900px){
  .hero{align-items:end;justify-items:center;padding-inline:20px;padding-bottom:56px}
  .hero::before{background:linear-gradient(to top,rgba(var(--veil),var(--pool)) 0%,rgba(var(--veil),calc(var(--pool) * .55)) 45%,rgba(var(--veil),0) 72%)}
  .hero-inner{max-width:40rem;text-align:center}
  .lead{margin-inline:auto}
  .actions,.hint{justify-content:center}
}

/* page-load sequence: the one orchestrated motion moment */
.rise{opacity:0;transform:translateY(14px);animation:rise .9s cubic-bezier(.2,.7,.2,1) forwards}
.rise:nth-child(1){animation-delay:.10s}.rise:nth-child(2){animation-delay:.22s}
.rise:nth-child(3){animation-delay:.36s}.rise:nth-child(4){animation-delay:.50s}
.rise:nth-child(5){animation-delay:.80s}
@keyframes rise{to{opacity:1;transform:none}}

/* ---------- Problem ---------- */
.slab{border-radius:var(--r-slab);padding:clamp(28px,5vw,64px)}
.statement{
  font-family:var(--f-serif);font-variation-settings:"opsz" 36;font-weight:350;
  font-size:clamp(1.45rem,2.7vw,2.1rem);line-height:1.32;max-width:44rem;text-wrap:pretty;
}
.statement + .statement{margin-top:22px;color:var(--text-2)}
.figures{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:clamp(32px,5vw,52px);border-top:1px solid var(--hair)}
.figures div{padding:22px 24px 0 0}
.figures div + div{padding-left:24px;border-left:1px solid var(--hair)}
.figures b{display:block;font-family:var(--f-serif);font-weight:400;font-size:clamp(1.6rem,3vw,2.25rem);line-height:1.1;color:var(--accent)}
.figures span{display:block;margin-top:6px;font-size:.9375rem;color:var(--text-2)}
.source{margin-top:28px;font-size:.875rem;color:var(--text-2)}
.source a{text-underline-offset:3px}
@media (max-width:720px){
  .figures{grid-template-columns:1fr}
  .figures div,.figures div + div{padding:18px 0;border-left:0;border-bottom:1px solid var(--hair)}
}

/* ---------- How it works ---------- */
.loops{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.loop{border-radius:var(--r-panel);padding:clamp(24px,3.4vw,40px)}
.loop h3{font-family:var(--f-serif);font-size:1.75rem;line-height:1.15}
.loop .sub{margin-top:8px;color:var(--text-2);font-size:1rem}
.steps{list-style:none;margin:26px 0 0;padding:0;counter-reset:s}
.steps li{
  counter-increment:s;display:grid;grid-template-columns:2.25rem 1fr;gap:4px 12px;
  padding:16px 0;border-top:1px solid var(--hair);
}
.steps li::before{
  content:counter(s);grid-row:span 2;width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;font-size:.8125rem;font-weight:700;
  color:var(--accent);border:1.5px solid color-mix(in srgb,var(--accent) 60%,transparent);
}
.steps strong{font-weight:600}
.steps span{color:var(--text-2);font-size:1rem}
.models{margin-top:22px;color:var(--text-2);font-size:.9375rem}
@media (max-width:860px){.loops{grid-template-columns:1fr}}

/* ---------- Details ---------- */
.details{border-radius:var(--r-slab);padding:clamp(8px,1.5vw,12px) clamp(24px,4vw,52px)}
.detail{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.4fr);gap:10px 48px;padding:clamp(22px,3vw,32px) 0}
.detail + .detail{border-top:1px solid var(--hair)}
.detail h3{font-family:var(--f-serif);font-size:clamp(1.25rem,1.8vw,1.5rem);line-height:1.25;font-variation-settings:"opsz" 30}
.detail p{color:var(--text-2);max-width:36rem}
@media (max-width:720px){.detail{grid-template-columns:1fr}}

/* ---------- Status ---------- */
.status-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
.status-card{border-radius:var(--r-panel);padding:clamp(24px,3.4vw,40px)}
.status-card h3{font-family:var(--f-serif);font-size:1.5rem;line-height:1.2}
.goals{list-style:none;margin:20px 0 0;padding:0}
.goals li{display:grid;grid-template-columns:28px 1fr;gap:12px;padding:14px 0;border-top:1px solid var(--hair)}
.goals li svg{width:22px;height:22px;color:var(--accent);margin-top:2px}
.facts{margin:20px 0 0;display:grid;gap:0}
.facts div{display:grid;grid-template-columns:8.5rem 1fr;gap:12px;padding:12px 0;border-top:1px solid var(--hair);font-size:1rem}
.facts dt{color:var(--text-2)}
.facts dd{margin:0}
.card-text{margin-top:14px;color:var(--text-2);font-size:1.0625rem}
@media (max-width:860px){.status-grid{grid-template-columns:1fr}}

/* ---------- Footer ---------- */
.site-footer{padding:0 0 calc(env(safe-area-inset-bottom,0px) + 28px)}
.foot{
  border-radius:var(--r-panel);padding:22px clamp(20px,3vw,32px);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;font-size:.9375rem;
}
.foot .brand{padding:0}
.foot .by{color:var(--text-2);text-align:center}
.foot ul{list-style:none;margin:0;padding:0;display:flex;gap:6px;justify-content:flex-end}
.foot ul a{display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:var(--r-pill);text-decoration:none}
.foot ul a:hover{background:var(--glass-fill-2)}
@media (max-width:720px){
  .foot{grid-template-columns:1fr;text-align:center;justify-items:center}
  .foot ul{justify-content:center}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .rise{animation:none;opacity:1;transform:none}
  .btn,.nav-links a{transition:none}
}

/* ======================================================================
   Added for the project website (Nov 3): inner pages, results, commands,
   the sheet demo. Same tokens as above.
   ====================================================================== */
.page-plain{padding-top:calc(env(safe-area-inset-top,0px) + 112px)}
.page-plain section{padding-block:clamp(28px,5vw,56px)}
.page-intro{max-width:44rem}
.page-intro h1{font-size:clamp(2.1rem,4.4vw,3.4rem)}
.page-intro .lead{margin-top:16px;text-shadow:none}
.eyebrow{display:block;margin-bottom:12px;font-size:.875rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--accent)}
.panel{border-radius:var(--r-panel);padding:clamp(22px,3.4vw,40px)}
.panel + .panel{margin-top:20px}
.panel h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.panel h3{font-family:var(--f-serif);font-size:1.3rem;line-height:1.25;margin-top:28px}
.prose p,.prose ul,.prose ol{margin-top:14px;max-width:44rem}
.prose li{margin-top:6px}
.prose li::marker{color:var(--accent)}
.muted{color:var(--text-2)}
.small{font-size:.9375rem}
code,pre{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.875em}
:not(pre) > code{padding:1px 6px;border-radius:6px;background:var(--glass-fill-2);border:1px solid var(--hair);overflow-wrap:anywhere}
pre{margin:14px 0 0;padding:16px 18px;border-radius:var(--r-item);border:1px solid var(--hair);background:var(--glass-fill-2);overflow-x:auto;line-height:1.5;max-width:100%}
pre code{font-size:.9rem}
a{text-underline-offset:3px}
.prose a,.table a,.credit a,.source a{color:var(--text);text-decoration-color:var(--accent);text-decoration-thickness:1.5px}
.btn-glass{color:var(--text)}
.actions-left{justify-content:flex-start}

/* results table: a real table, readable at phone width */
.table-wrap{margin-top:18px;overflow-x:auto;border-top:1px solid var(--hair)}
.table{width:100%;border-collapse:collapse;font-size:1rem}
.table caption{text-align:left;padding:0 0 10px;color:var(--text-2);font-size:.9375rem}
.table th,.table td{text-align:left;vertical-align:top;padding:12px 14px 12px 0;border-bottom:1px solid var(--hair)}
.table thead th{font-size:.875rem;font-weight:600;color:var(--text-2)}
.table tbody th{font-weight:600}
.table td.file{font-size:.875rem;color:var(--text-2);min-width:10rem}
.nm{font-weight:600}
@media (max-width:640px){
  .table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .table tr{display:block;padding:12px 0;border-bottom:1px solid var(--hair)}
  .table th,.table td{display:block;border:0;padding:2px 0}
  .table td.file{min-width:0}
}

/* status words: always text, never color alone */
.tag{display:inline-block;padding:1px 10px;border-radius:var(--r-pill);border:1px solid var(--hair);font-size:.8125rem;font-weight:600;color:var(--text-2);white-space:nowrap}

/* cards linking to the pages */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:8px}
.card{display:flex;flex-direction:column;gap:10px;border-radius:var(--r-panel);padding:clamp(22px,3vw,32px);text-decoration:none;min-height:44px}
.card h2,.card h3{font-family:var(--f-serif);font-size:1.5rem;line-height:1.2}
.card p{color:var(--text-2);font-size:1rem}
.card .go{margin-top:auto;font-weight:600;color:var(--accent)}
.card:hover{transform:translateY(-1px)}
@media (max-width:900px){.cards{grid-template-columns:1fr}}

/* the sheet and its demo */
.sheet-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:24px;align-items:start}
@media (max-width:960px){.sheet-layout{grid-template-columns:1fr}}
.sheet{margin:0}
.sheet-frame{position:relative;background:#FFFFFF;border-radius:var(--r-item);box-shadow:var(--glass-shadow);overflow:hidden;max-width:620px;margin-inline:auto}
.sheet-frame img{width:100%;height:auto}
.sheet-overlay{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:crosshair}
.sheet-overlay .part{fill:transparent;stroke:transparent;stroke-width:3px;vector-effect:non-scaling-stroke;outline:none}
.sheet-overlay .part.on{fill:rgba(47,93,138,.14);stroke:#2F5D8A;stroke-width:3px}
.sheet-overlay .part:focus-visible{fill:rgba(47,93,138,.14);stroke:#2F5D8A;stroke-width:4px;stroke-dasharray:6 3}
.sheet figcaption{margin-top:12px;font-size:.9375rem;color:var(--text-2);max-width:620px;margin-inline:auto}
.demo-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px}
.toggle{min-height:44px;padding:0 18px;border-radius:var(--r-pill);border:1.5px solid var(--accent);background:transparent;color:var(--text);font:inherit;font-weight:600;font-size:1rem;cursor:pointer}
.toggle[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.toggle:disabled{opacity:.6;cursor:not-allowed}
.readout{min-height:1.6em;font-family:var(--f-serif);font-size:1.35rem}
.readout-label{font-size:.875rem;color:var(--text-2)}
.parts{list-style:none;margin:14px 0 0;padding:0}
.parts li{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;align-items:start;padding:10px 0;border-top:1px solid var(--hair)}
.parts .say{min-height:44px;min-width:44px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--hair);background:var(--glass-fill-2);color:var(--text);font:inherit;font-size:.9375rem;font-weight:600;cursor:pointer;text-align:left}
.parts .say:hover{border-color:var(--accent)}
.parts .say:disabled{cursor:default}
.parts .info{font-size:.9375rem;color:var(--text-2);padding-top:10px}
.parts li.plain{grid-template-columns:1fr}
.parts li.plain .info{padding-top:0}
.notice{margin-top:18px;padding:16px 18px;border-radius:var(--r-item);border:1px solid var(--hair);border-left:4px solid var(--accent);font-size:1rem}
.credit{margin-top:18px;font-size:.9375rem;color:var(--text-2)}
.credit q{color:var(--text)}

/* screenshots */
.shot{margin:18px 0 0}
.shot img{width:100%;max-width:560px;height:auto;border-radius:var(--r-item);border:1px solid var(--hair);background:#FFFFFF}
.shot figcaption{margin-top:8px;font-size:.9375rem;color:var(--text-2);max-width:560px}

/* the footer on inner pages has the same look */
.site-footer{margin-top:clamp(28px,5vw,56px)}
.foot .lic{grid-column:1 / -1;text-align:center;font-size:.875rem;color:var(--text-2)}

@media (prefers-reduced-motion: reduce){
  .card:hover,.btn-solid:hover,.btn-glass:hover{transform:none}
}
@media (prefers-reduced-transparency: reduce){
  .menu{background:var(--bg)}
}
.status-grid{margin-top:20px}
.status-card,.loop,.panel{min-width:0}
.facts dd{min-width:0;overflow-wrap:anywhere}
.sheet-inner{position:relative;transform-origin:0 0}
.sheet-inner img{width:100%;height:auto}
.small-toggle{display:inline-flex;align-items:center;margin-top:10px;font-size:.9375rem}
.shots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;max-width:760px}
.shots .shot img{max-width:100%}
@media (max-width:640px){.shots{grid-template-columns:1fr}}