/* Warp — warp.lts.bi
   Design system per 02-UI-UX-Design.md. Numbers come from data/facts.json (NFR-6). */

/* ---------- self-hosted fonts (latin woff2, font-display: swap) ---------- */
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/inter-400.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/inter-500.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/inter-600.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/jbmono-500.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/jbmono-600.woff2') format('woff2')}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/grotesk-500.woff2') format('woff2')}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/grotesk-600.woff2') format('woff2')}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/grotesk-700.woff2') format('woff2')}

/* ---------- tokens ---------- */
:root{
  --bg-deep:#0B0E14; --bg-panel:#141925; --bg-elevated:#1C2230; --line:#2A3346;
  --text-hi:#E6EAF2; --text-mid:#9BA6BC; --text-low:#5C6781;
  --accent:#5EE6C2; --accent-deep:#2BA88B;
  --valid:#5EE6C2; --warn:#E6C45E; --invalid:#E6685E;

  --ff-display:'Space Grotesk',Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --ff-body:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --ff-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-inout:cubic-bezier(.65,0,.35,1);
  --dur-micro:120ms; --dur-ui:400ms; --dur-state:700ms;

  --maxw:1200px;
  --pad-section:112px;
}

/* ---------- reset ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  background:var(--bg-deep);color:var(--text-hi);font-family:var(--ff-body);
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg,canvas{display:block;max-width:100%}
.mono{font-family:var(--ff-mono)}
.state{font-family:var(--ff-mono);font-weight:500;color:var(--text-hi)} /* commerce state-name motif */

/* ---------- layout primitives ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:var(--pad-section) 0;border-top:1px solid var(--line)}
section.hero-section{border-top:none;padding-top:0}
.eyebrow{font-family:var(--ff-mono);font-size:.8125rem;font-weight:500;color:var(--text-low);
  text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
h2{font-family:var(--ff-display);font-size:clamp(1.7rem,3.5vw,2.25rem);font-weight:600;
  letter-spacing:-.01em;line-height:1.15}
h3{font-family:var(--ff-display);font-size:1.375rem;font-weight:600;line-height:1.25}
p{color:var(--text-mid);max-width:68ch}
.lead{font-size:1.125rem;line-height:1.6;color:var(--text-mid)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head h2{color:var(--text-hi)}
.section-head p{margin-top:14px}

/* ---------- skip link + focus ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#06231d;
  padding:10px 16px;border-radius:0 0 8px 0;font-weight:600;z-index:200}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}

/* ---------- nav ---------- */
nav.top{position:fixed;inset:0 0 auto 0;height:58px;z-index:100;display:flex;align-items:center;
  border-bottom:1px solid transparent;transition:background var(--dur-ui) var(--ease-out),border-color var(--dur-ui) var(--ease-out)}
nav.top.scrolled{background:rgba(11,14,20,.82);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-color:var(--line)}
nav.top .wrap{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{font-family:var(--ff-mono);font-weight:600;font-size:1.02rem;letter-spacing:-.01em;color:var(--text-hi)}
.brand b{color:var(--accent);font-weight:600}
.brand .sep{color:var(--text-low);font-weight:500}
.navlinks{display:flex;gap:26px;align-items:center}
.navlinks a:not(.btn){color:var(--text-mid);font-size:.92rem;position:relative;transition:color var(--dur-micro)}
.navlinks a:not(.btn):hover{color:var(--text-hi)}
.navlinks a:not(.btn)::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:1.5px;
  background:var(--accent);transition:right var(--dur-ui) var(--ease-out)}
.navlinks a:not(.btn):hover::after{right:0}
.btn{display:inline-flex;align-items:center;gap:7px;background:var(--accent);color:#06231d;
  padding:8px 15px;border-radius:9px;font-weight:600;font-size:.88rem;transition:background var(--dur-micro),transform var(--dur-micro)}
.btn:hover{background:#7BEFD2}
.btn.ghost{background:transparent;color:var(--text-hi);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent-deep);background:var(--bg-elevated)}
@media(max-width:760px){.navlinks a:not(.btn){display:none}}

/* ---------- hero ---------- */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:96px 20px 56px;position:relative}
#stage{position:relative;width:100%;max-width:820px;height:420px;margin-bottom:8px}
#stage canvas{width:100%;height:100%}
#poster{position:absolute;inset:0;width:100%;height:100%}
#stage.live #poster{opacity:0;transition:opacity 600ms var(--ease-out)}
.hero-cap{position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  font-family:var(--ff-mono);font-size:.8rem;color:var(--text-low);white-space:nowrap;
  opacity:0;transition:opacity .35s;pointer-events:none;max-width:94%}
.hero-cap.show{opacity:1}
.hero-cap.reject{color:var(--invalid)}
h1{font-family:var(--ff-display);font-weight:600;letter-spacing:-.025em;line-height:1.02;
  font-size:clamp(2.5rem,6vw,5rem);margin-top:18px;color:var(--text-hi)}
.hero .sub{margin:20px auto 0;max-width:600px;font-size:clamp(1rem,2vw,1.18rem);
  line-height:1.55;color:var(--text-mid)}
.ctas{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:32px}
.hero-meta{margin-top:24px;font-family:var(--ff-mono);font-size:.82rem;color:var(--text-low);letter-spacing:.01em}
.hero-meta b{color:var(--text-mid);font-weight:500}
.scrollhint{margin-top:42px;font-family:var(--ff-mono);font-size:.72rem;color:var(--text-low);
  text-transform:uppercase;letter-spacing:.14em;animation:bob 2.2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0);opacity:.45}50%{transform:translateY(5px);opacity:.9}}

/* ---------- install pill ---------- */
.pill{display:inline-flex;align-items:center;gap:12px;background:var(--bg-panel);
  border:1px solid var(--line);border-radius:11px;padding:13px 16px;cursor:pointer;
  font-family:var(--ff-mono);transition:border-color var(--dur-micro),background var(--dur-micro)}
.pill:hover{border-color:var(--accent-deep);background:var(--bg-elevated)}
.pill .cmd{font-size:.9rem;color:var(--text-hi)}
.pill .prompt{color:var(--text-low)}
.pill .ic{min-width:54px;text-align:right;font-size:.82rem;color:var(--accent);display:inline-flex;gap:5px;justify-content:flex-end;align-items:center}
.pill .ic svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- problem ---------- */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:24px}
.card h3{font-size:1.05rem;color:var(--text-hi);margin-bottom:8px;font-family:var(--ff-display)}
.card .bad{font-family:var(--ff-mono);font-size:.82rem;color:var(--invalid);margin-top:14px;
  background:rgba(230,104,94,.08);border:1px solid rgba(230,104,94,.22);border-radius:7px;padding:8px 10px}
.card p{font-size:.95rem}

/* ---------- what warp is: spec cards ---------- */
.specgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px}
.spec{background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:22px}
.spec .n{font-family:var(--ff-display);font-size:2.1rem;font-weight:600;color:var(--accent);line-height:1}
.spec .k{margin-top:8px;color:var(--text-hi);font-weight:500;font-size:.98rem}
.spec .d{margin-top:6px;color:var(--text-low);font-size:.85rem;line-height:1.5}
.primitives{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.primitives .tag{font-family:var(--ff-mono);font-size:.85rem;color:var(--text-hi);
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:7px;padding:6px 12px}

/* ---------- code block ---------- */
.codewrap{position:relative;background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.codewrap .bar{display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;border-bottom:1px solid var(--line);background:var(--bg-deep)}
.codewrap .bar .fname{font-family:var(--ff-mono);font-size:.8rem;color:var(--text-low)}
.codewrap .copy{font-family:var(--ff-mono);font-size:.78rem;color:var(--accent);cursor:pointer;
  background:none;border:none;display:inline-flex;gap:6px;align-items:center}
.codewrap .copy svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2}
pre{margin:0;padding:18px 16px;overflow-x:auto;counter-reset:ln}
code{font-family:var(--ff-mono);font-size:.86rem;line-height:1.65;color:var(--text-mid)}
.tabs{display:flex;gap:6px;margin-bottom:14px}
.tab{font-family:var(--ff-mono);font-size:.82rem;color:var(--text-mid);background:var(--bg-panel);
  border:1px solid var(--line);border-radius:8px;padding:7px 14px;cursor:pointer}
.tab[aria-selected="true"]{color:var(--accent);border-color:var(--accent-deep);background:var(--bg-elevated)}
.tok-state{color:var(--accent)}
.tok-com{color:var(--text-low)}
.tok-str{color:#A8D8C8}
.tok-kw{color:#8FA9D8}

/* ---------- invariant table (the designed component) ---------- */
.layers{display:grid;grid-template-columns:1fr 1.25fr;gap:28px;align-items:start}
.layer-note{background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:22px}
.layer-note .badge{display:inline-block;font-family:var(--ff-mono);font-size:.72rem;letter-spacing:.05em;
  text-transform:uppercase;color:var(--accent);border:1px solid var(--accent-deep);border-radius:6px;padding:3px 9px;margin-bottom:12px}
.layer-note p{font-size:.95rem}
.layer-note ul{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:8px}
.layer-note li{display:flex;gap:9px;align-items:flex-start;font-size:.9rem;color:var(--text-mid)}
.layer-note li b{font-family:var(--ff-mono);color:var(--valid);font-weight:500;font-size:.85rem}
.invtable{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--bg-panel)}
.invtable .hd{display:grid;grid-template-columns:56px 1fr auto;gap:14px;padding:12px 18px;
  border-bottom:1px solid var(--line);font-family:var(--ff-mono);font-size:.72rem;
  text-transform:uppercase;letter-spacing:.07em;color:var(--text-low);background:var(--bg-deep)}
.invrow{display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;
  padding:15px 18px;border-bottom:1px solid var(--line)}
.invrow:last-child{border-bottom:none}
.invrow .id{font-family:var(--ff-mono);color:var(--text-low);font-size:.9rem}
.invrow .nm{color:var(--text-hi);font-size:.97rem}
.invrow .nm small{display:block;color:var(--text-low);font-size:.8rem;font-weight:400;margin-top:3px;max-width:46ch;line-height:1.45}
.chip{font-family:var(--ff-mono);font-size:.7rem;font-weight:600;letter-spacing:.04em;
  padding:5px 10px;border-radius:6px;white-space:nowrap;position:relative;overflow:hidden}
.chip span{position:relative;z-index:1}
.chip::before{content:"";position:absolute;inset:0;transform:scaleX(0);transform-origin:left;
  transition:transform 480ms var(--ease-out)}
.invtable.revealed .chip::before{transform:scaleX(1)}
.chip.valid{color:var(--valid)} .chip.valid::before{background:rgba(94,230,194,.13)}
.chip.warn{color:var(--warn)} .chip.warn::before{background:rgba(230,196,94,.13)}
.chip.invalid{color:var(--invalid)} .chip.invalid::before{background:rgba(230,104,94,.13)}
.foot-note{margin-top:18px;font-size:.88rem;color:var(--text-low)}

/* ---------- conformance ---------- */
.statline{display:flex;flex-wrap:wrap;gap:14px;margin:6px 0 32px}
.stat{flex:1 1 150px;background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:20px}
.stat .v{font-family:var(--ff-display);font-size:2rem;font-weight:600;color:var(--text-hi);line-height:1}
.stat .v .slash{color:var(--text-low)}
.stat .l{margin-top:8px;color:var(--text-mid);font-size:.88rem}
.buglist{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.bug{background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:20px}
.bug .nm{font-family:var(--ff-mono);font-size:.9rem;color:var(--warn)}
.bug p{font-size:.9rem;margin-top:8px}
.bug .lock{font-family:var(--ff-mono);font-size:.76rem;color:var(--text-low);margin-top:12px;
  border-top:1px solid var(--line);padding-top:10px}
.prove{margin-top:32px;background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;
  padding:24px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.prove h3{color:var(--text-hi)} .prove p{font-size:.95rem;margin-top:6px}
.badge-img{height:22px}

/* ---------- roadmap ---------- */
.roadmap{display:flex;flex-direction:column;gap:14px}
.rm{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.rm .when{font-family:var(--ff-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--text-low);border:1px solid var(--line);border-radius:6px;padding:5px 9px;white-space:nowrap}
.rm .nm{color:var(--text-hi);font-weight:500}
.rm p{font-size:.92rem;margin-top:4px}

/* ---------- demoted language section ---------- */
.demoted{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center}
@media(max-width:860px){.demoted{grid-template-columns:1fr}}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 64px}
.foot-grid{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.foot-brand{max-width:300px}
.foot-brand .brand{font-size:1.1rem}
.foot-brand p{font-size:.88rem;margin-top:10px;color:var(--text-low)}
.foot-cols{display:flex;gap:48px;flex-wrap:wrap}
.foot-col h4{font-family:var(--ff-mono);font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--text-low);margin-bottom:12px}
.foot-col a{display:block;color:var(--text-mid);font-size:.9rem;padding:4px 0;transition:color var(--dur-micro)}
.foot-col a:hover{color:var(--accent)}
.foot-col a .ext{color:var(--text-low);font-size:.72rem}
.colophon{margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--text-low);font-size:.82rem}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity var(--dur-ui) var(--ease-out),transform var(--dur-ui) var(--ease-out)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:860px){
  :root{--pad-section:72px}
  .layers{grid-template-columns:1fr}
  .specgrid{grid-template-columns:repeat(2,1fr)}
  .cols3{grid-template-columns:1fr}
  .buglist{grid-template-columns:1fr}
  #stage{height:340px}
}
@media(max-width:420px){
  .specgrid{grid-template-columns:1fr}
  #stage{height:300px}
  h1{font-size:2.5rem}
}

/* ---------- reduced motion: kill all motion, show poster ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .invtable .chip::before{transform:scaleX(1)}
  .scrollhint{animation:none}
}