/* UIPrism site. Tokens follow brand-guide.md; type is IBM Plex, self-hosted (no external requests). */
@font-face{font-family:"IBM Plex Sans";font-weight:400;font-style:normal;font-display:swap;src:url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:500;font-style:normal;font-display:swap;src:url(fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:600;font-style:normal;font-display:swap;src:url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-style:normal;font-display:swap;src:url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}

:root{
  --ink:#141418; --ink-2:#585863; --paper:#fafaf9; --paper-2:#f1f1ef; --line:#dcdcd8;
  --accent:#4f46e5;          /* text and links: 6.6:1 on paper */
  --accent-fill:#6366f1;     /* graphics only; 4.5:1 is not met for small text */
  --dark:#0e0e11; --dark-2:#17171c; --dark-line:#2b2b33; --dark-ink:#ececf0; --dark-ink-2:#a8a8b4;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:1200px; --gutter:clamp(20px,4vw,48px); --radius:6px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent-fill);outline-offset:3px;border-radius:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:var(--radius);z-index:100}
.skip:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(34px,5vw,60px)}
h2{font-size:clamp(26px,3.2vw,38px);max-width:22ch}
h3{font-size:19px;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
.label{font:500 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2)}
.dark .label{color:var(--dark-ink-2)}

/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(250,250,249,.94);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:19px;letter-spacing:-.02em}
.brand svg{width:32px;height:32px;border-radius:8px}
.brand b{color:var(--accent);font-weight:600}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--ink);text-decoration:none;font-size:15px}
.nav a:hover{color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:var(--radius);font:500 15px/1 var(--sans);text-decoration:none;border:1px solid var(--ink);color:#fff;background:var(--ink);min-height:44px}
.btn:hover{background:#2a2a33}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--paper-2)}
.nav .btn{color:#fff;padding:10px 16px}
.nav .btn:hover{color:#fff}

/* hero */
.hero{padding:clamp(48px,8vw,104px) 0 clamp(48px,7vw,88px);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,5vw,72px);align-items:center}
.hero .label{margin-bottom:22px;display:flex;gap:10px;align-items:center}
.pill{font:500 12px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--ink);padding:5px 8px;border-radius:3px;color:var(--ink)}
.lede{margin-top:24px;font-size:clamp(18px,1.7vw,21px);line-height:1.55;color:var(--ink-2);max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero .note{margin-top:20px;font:400 13px/1.5 var(--mono);color:var(--ink-2)}
.hero figure{margin:0}
.hero img{width:100%;height:auto}

/* sections */
section{padding:clamp(56px,8vw,104px) 0}
.head{display:grid;gap:16px;margin-bottom:clamp(32px,5vw,56px)}
.origin{margin-top:40px;max-width:46em;color:var(--ink-2);padding-left:20px;border-left:3px solid var(--accent-fill)}

/* pipeline (dark) */
.dark{background:var(--dark);color:var(--dark-ink)}
.dark h2{color:#fff}
.dark a{color:#a5b4fc}
.chips{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chip{font:400 12.5px/1 var(--mono);padding:7px 9px;border:1px solid var(--dark-line);border-radius:3px;color:var(--dark-ink);background:#111116}
.chip i{font-style:normal;color:var(--dark-ink-2)}
.chip.live{border-color:#4f46e5}
.num{font:500 13px/1 var(--mono);color:#a5b4fc;letter-spacing:.08em;margin:0 0 14px}
.dark .row{border-top-color:var(--dark-line)}
.dark .row-text h3{color:#fff}
.dark .row-text p:last-child,.dark .row-text p{color:var(--dark-ink-2)}
.dark .row-text strong{color:var(--dark-ink);font-weight:600}
.dark .row-text code{font-family:var(--mono);font-size:.92em;color:var(--dark-ink)}
.dark .shot{border-color:var(--dark-line)}
.dark .row-shots figcaption{color:var(--dark-ink-2)}
.row-shots.four{grid-template-columns:repeat(2,minmax(0,1fr))}

/* walkthrough */
.walk{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.player{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#000}
.player video{width:100%;height:auto;aspect-ratio:1280/608;background:#000}
.cap{margin-top:14px;font-size:14px;line-height:1.55;color:var(--ink-2);max-width:62em}

/* status */
.status{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.status>div{padding:28px 28px 8px 0}
.status>div+div{padding-left:28px;border-left:1px solid var(--line)}
.status h3{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-size:18px}
.status ul{margin:0;padding:0;list-style:none;display:grid;gap:10px;color:var(--ink-2);font-size:16px}
.status li{padding-left:18px;position:relative}
.status li::before{content:"";position:absolute;left:0;top:.78em;width:8px;height:2px;background:var(--ink-2)}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.dot.a{background:#16a34a}.dot.b{background:#d97706}.dot.c{background:#9ca3af}
.betanote{margin-top:36px;max-width:50em;font-size:18px;line-height:1.6}
.limits{margin-top:14px;max-width:50em;color:var(--ink-2);font-size:15px}

/* about + footer */
#about{padding-top:0}
.about{border-top:1px solid var(--line);padding-top:clamp(40px,6vw,72px);display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,5vw,72px)}
.about p{color:var(--ink-2);max-width:36em}
.about h2{margin:16px 0 14px;font-size:22px;font-weight:500;letter-spacing:-.01em;line-height:1.3;max-width:none}
.links{list-style:none;margin:0;padding:0;display:grid;gap:0;align-content:start}
.links li{border-top:1px solid var(--line)}
.links li:last-child{border-bottom:1px solid var(--line)}
.links a{display:flex;justify-content:space-between;gap:16px;padding:16px 0;text-decoration:none;color:var(--ink);font-weight:500}
.links a span{font:400 13px/1.6 var(--mono);color:var(--ink-2)}
.links a:hover{color:var(--accent)}
footer{border-top:1px solid var(--line);padding:32px 0 48px;font-size:14px;color:var(--ink-2)}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between}
footer a{color:var(--ink-2)}
footer a:hover{color:var(--accent)}

/* legal page */
.legal{max-width:760px;padding:56px var(--gutter) 96px;margin:0 auto}
.legal h1{font-size:clamp(30px,4vw,44px);margin-bottom:12px}
.legal h2{font-size:26px;max-width:none;margin:56px 0 12px}
.legal h3{font-size:18px;margin:28px 0 8px}
.legal p,.legal li{color:#2a2a32;font-size:16px}
.legal p+p{margin-top:12px}
.legal ul{margin:10px 0;padding-left:20px}
.legal address{font-style:normal;margin:12px 0}
.legal .tn{padding:12px 16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-2);font-size:15px;margin:16px 0}
.legal hr{border:0;border-top:1px solid var(--line);margin:64px 0 0}
.legal .updated{font:400 13px/1.5 var(--mono);color:var(--ink-2)}
.legal nav.toc{display:flex;gap:20px;margin:20px 0 8px;font-size:15px}

/* responsive */
@media (max-width:900px){
  .hero .wrap,.about{grid-template-columns:1fr}
  .hero figure{max-width:420px;margin:0 auto;order:-1}
  .status,.steps{grid-template-columns:1fr}
  .status>div{padding:24px 0 8px!important;border-left:0!important}
  .status>div+div{border-top:1px solid var(--line)}
  .step+.step{border-left:0;border-top:1px solid var(--dark-line)}
  .arrow{right:auto;left:50%;top:auto;bottom:-13px;transform:translateX(-50%) rotate(90deg)}
}
@media (max-width:720px){
  .nav a:not(.btn){display:none}
  body{font-size:16px}
}

/* problem */
.lead{max-width:40em;font-size:clamp(18px,1.7vw,21px);line-height:1.55;color:var(--ink)}
.issues{margin:clamp(32px,5vw,48px) 0 0;border-top:1px solid var(--line)}
.issues>div{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}
.issues dt{font-weight:600;font-size:18px;letter-spacing:-.01em;line-height:1.35}
.issues dd{margin:0;color:var(--ink-2);font-size:17px}
.origin{margin-top:36px}

/* video start screen (same scheme as the portfolio: title, play button, prism, fades out on start) */
.player{position:relative}
.start{position:absolute;inset:0;display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:clamp(12px,3vw,40px);padding:clamp(16px,4vw,48px) clamp(20px,5vw,64px);background:var(--paper-2);border:0;cursor:pointer;text-align:left;color:var(--ink);font:inherit;transition:opacity .5s ease,visibility .5s}
.start.is-gone{opacity:0;visibility:hidden;pointer-events:none}
.start:focus-visible{outline:3px solid var(--accent-fill);outline-offset:-5px}
.start-text{display:flex;flex-direction:column;align-items:flex-start;gap:clamp(10px,2vw,20px)}
.start-eyebrow{font:500 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.start-title{font-size:clamp(22px,3.4vw,40px);line-height:1.12;font-weight:600;letter-spacing:-.02em}
.start-play{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:50%;background:var(--ink);color:#fff;transition:transform .25s ease}
.start:hover .start-play{transform:scale(1.1)}
.start img{width:100%;max-height:100%;height:auto;object-fit:contain;justify-self:center}
@media (max-width:560px){.start{grid-template-columns:1fr}.start img{display:none}.start-play{width:48px;height:48px}}
@media (prefers-reduced-motion:reduce){.start,.start-play{transition:none}}

/* interface gallery */
.rows{display:grid;gap:clamp(48px,7vw,88px)}
.row{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(24px,4vw,56px);align-items:start;padding-top:clamp(24px,4vw,40px);border-top:1px solid var(--line)}
.row.wide{grid-template-columns:1fr}
.row.wide .row-text{max-width:42em}
.row-text .label{margin-bottom:14px}
.row-text h3{margin-bottom:12px;font-size:22px}
.row-text p:last-child{color:var(--ink-2);font-size:16px}
.row-shots{display:grid;gap:20px;align-items:start}
.row-shots.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.row-shots figure{margin:0}
.row-shots figcaption{margin-top:10px;font:400 13px/1.4 var(--mono);color:var(--ink-2)}
.shot{display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;cursor:zoom-in;line-height:0}
.shot img{width:100%;height:auto;transition:transform .35s ease}
.shot:hover img{transform:scale(1.015)}
.row-shots.even .shot{aspect-ratio:16/10}
.row-shots.even .shot img{height:100%;object-fit:cover;object-position:top left}
.shot:focus-visible{outline:3px solid var(--accent-fill);outline-offset:3px}
@media (prefers-reduced-motion:reduce){.shot img{transition:none}}
.lightbox{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:clamp(12px,3vw,40px);background:rgba(14,14,17,.86);cursor:zoom-out;opacity:0;transition:opacity .25s ease}
.lightbox.is-open{opacity:1}
.lightbox img{max-width:100%;max-height:100%;width:auto;height:auto;border-radius:var(--radius);background:#fff;transform:scale(.96);transition:transform .35s ease}
.lightbox.is-open img{transform:none}
.lightbox-close{position:absolute;top:clamp(8px,2vw,20px);right:clamp(8px,2vw,20px);width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.6);background:transparent;color:#fff;font-size:26px;line-height:1;cursor:pointer}
.lightbox-close:hover{background:#fff;color:var(--ink)}
.lightbox-close:focus-visible{outline:2px solid #fff;outline-offset:2px}
html.lightbox-open{overflow:hidden}
@media (prefers-reduced-motion:reduce){.lightbox,.lightbox img{transition:none}}


@media (max-width:900px){
  .issues>div{grid-template-columns:1fr;gap:6px}
  .row{grid-template-columns:1fr}
}
@media (max-width:560px){.row-shots.two{grid-template-columns:1fr}}
.chips+p{margin-top:20px}