/* Tracewell — cassette futurism. Tokens first; components only reference variables. */
:root{
  --case:#d8d4c6;        /* equipment plastic */
  --case-hi:#e6e3d8;
  --case-lo:#b8b4a5;
  --panel:#1c1c1e;       /* black faceplate */
  --panel-line:#3b3b3f;
  --ink:#141414;
  --ink-soft:#3a3935;
  --on-panel:#ece9dd;
  --on-panel-soft:#a9a698;
  --paper:#f3eede;       /* cassette label */
  --orange:#ee4f1a;
  --amber:#f3a31f;
  --red:#c5281b;
  --oxide:#5c3320;
  --lamp:#74e07a;
  --din:Bahnschrift,"DIN Alternate","DIN Next","D-DIN","Roboto Condensed","Arial Narrow",Arial,sans-serif;
  --mono:"Cascadia Mono",Consolas,"SF Mono",Menlo,"DejaVu Sans Mono",monospace;
  --hand:"Segoe Print","Bradley Hand","Marker Felt","Comic Sans MS",cursive;
  --fs-body:18px; --fs-small:15px; --fs-lead:21px; --fs-h3:25px;
  --fs-h2:clamp(32px,4.2vw,54px); --fs-h1:clamp(46px,6.6vw,94px);
  --gap:24px; --pad:36px; --section:84px; --radius:5px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--case);color:var(--ink);font-family:var(--din);font-size:var(--fs-body);line-height:1.5}
a{color:inherit;text-underline-offset:3px}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--pad)}
h1,h2,h3,p{margin:0}
h2{font-size:var(--fs-h2);line-height:1;font-weight:700;font-stretch:87%;letter-spacing:-.01em}
h3{font-size:var(--fs-h3);line-height:1.1;font-weight:700;font-stretch:87%}
.sub{margin-top:10px;color:var(--ink-soft)}
.skip{position:absolute;left:-999px;top:0;background:var(--panel);color:var(--on-panel);padding:10px 14px;z-index:20}
.skip:focus{left:8px;top:8px}

/* header */
.site-head{position:sticky;top:0;z-index:10;background:var(--case);border-bottom:2px solid var(--ink)}
.head-row{display:flex;align-items:center;gap:var(--gap);height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:23px;font-stretch:87%;letter-spacing:.01em}
.logo svg{width:40px;height:22px;fill:none;stroke:var(--ink);stroke-width:2.5}
.logo .hub{fill:var(--orange);stroke:none}
.site-head nav{display:flex;gap:26px;margin-left:auto;font-size:16px}
.site-head nav a{text-decoration:none;padding:6px 0;border-bottom:2px solid transparent}
.site-head nav a:hover{border-bottom-color:var(--orange)}

/* buttons: keys that press down */
.btn{display:inline-block;text-decoration:none;font-weight:600;font-size:17px;padding:13px 22px 11px;border:2px solid var(--ink);border-radius:var(--radius);background:var(--orange);color:#fff;box-shadow:0 5px 0 var(--ink);transition:transform .08s,box-shadow .08s}
.btn:hover,.btn:active{transform:translateY(3px);box-shadow:0 2px 0 var(--ink)}
.btn-plain{background:var(--case-hi);color:var(--ink);box-shadow:0 5px 0 var(--case-lo)}
.btn-plain:hover,.btn-plain:active{box-shadow:0 2px 0 var(--case-lo)}
.btn-small{white-space:nowrap;font-size:15px;padding:8px 14px 6px;box-shadow:0 3px 0 var(--ink)}
.btn-small:hover{transform:translateY(2px);box-shadow:0 1px 0 var(--ink)}

/* hero */
.hero{padding:68px 0 76px}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero h1{font-size:var(--fs-h1);line-height:.94;font-weight:700;font-stretch:87%;letter-spacing:-.02em}
.lead{margin-top:26px;font-size:var(--fs-lead);line-height:1.45;color:var(--ink-soft);max-width:31em}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.avail{margin-top:30px;font-size:var(--fs-small);display:flex;align-items:center;gap:10px}
.lamp{width:10px;height:10px;border-radius:50%;background:var(--lamp);box-shadow:0 0 0 2px var(--ink),0 0 9px 2px #74e07a88;flex:none}

.tape{width:100%;height:auto;display:block}
.tape .shell{fill:#242426;stroke:#000;stroke-width:3}
.tape .shell-in{fill:none;stroke:#3d3d41;stroke-width:2}
.tape .screw circle{fill:#111;stroke:#5c5c61;stroke-width:1.5}
.tape .paper{fill:var(--paper)}
.tape .s1{fill:var(--oxide)}.tape .s2{fill:var(--red)}.tape .s3{fill:var(--orange)}.tape .s4{fill:var(--amber)}
.tape .t-name{font-family:var(--din);font-weight:700;font-size:31px;fill:var(--ink)}
.tape .t-side{font-family:var(--din);font-weight:700;font-size:31px;fill:var(--red)}
.tape .lines{stroke:var(--ink);stroke-width:1;opacity:.45}
.tape .hand{font-family:var(--hand);font-size:17px;fill:#22304d}
.tape .well{fill:#171718}
.tape .glass{fill:#33261c;stroke:#000;stroke-width:2}
.tape .oxide{stroke:var(--oxide);stroke-linecap:butt}
.tape .oxide.a{stroke-width:52}.tape .oxide.b{stroke-width:30}
.tape .rim{fill:var(--on-panel);stroke:#000;stroke-width:2}
.tape .hubc{fill:#171718}
.tape .teeth{stroke:#171718;stroke-width:5}
.tape .foot{fill:var(--panel);stroke:#000;stroke-width:3}
.tape .holes{fill:#000}
.reel{transform-box:fill-box;transform-origin:center;animation:spin 10s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.stripes{height:40px;background:linear-gradient(var(--oxide) 0 25%,var(--red) 25% 50%,var(--orange) 50% 75%,var(--amber) 75%)}

/* demo: black faceplate with a screen */
.demo{background:var(--panel);color:var(--on-panel);padding:var(--section) 0}
.demo-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.demo p{margin-top:18px;color:#cfccbf;max-width:30em}
.screen{--ph:#ffb347;margin:0;position:relative;overflow:hidden;background:#0c0a07;border:2px solid #000;border-radius:12px;box-shadow:0 0 0 2px var(--panel-line),0 0 60px #ee4f1a22,inset 0 0 60px #000}
.screen::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(transparent 0 2px,#0000002e 2px 3px)}
.screen-bar{display:flex;align-items:center;gap:10px;padding:11px 18px 10px;border-bottom:1px solid #2a2118;font-size:14px;color:var(--on-panel-soft)}
.screen-bar .where{margin-left:auto}
.term{padding:20px 22px 18px;font-family:var(--mono);font-size:14.5px;line-height:1.6;color:var(--ph);text-shadow:0 0 8px #ffb34755}
.term p{margin:0;max-width:none;color:inherit}
.term .pr{opacity:.6}
.typed{display:inline-block;vertical-align:bottom;overflow:hidden;white-space:nowrap;max-width:100%;border-right:.6em solid var(--ph);animation:type 1.7s steps(50,end) .3s both,blink 1s steps(1) infinite}
@keyframes type{from{width:0}to{width:calc(50ch + .1em)}}
@keyframes blink{50%{border-right-color:transparent}}
.hits{list-style:none;margin:18px 0 0;padding:0}
.hits li{display:grid;grid-template-columns:2ch 72px 12ch 7ch 1fr;column-gap:12px;align-items:center;padding:7px 0;border-top:1px dashed #3a2c1c;animation:rise .35s ease-out both}
.hits li:nth-child(1){animation-delay:2.1s}
.hits li:nth-child(2){animation-delay:2.3s}
.hits li:nth-child(3){animation-delay:2.5s}
@keyframes rise{from{opacity:0;transform:translateY(6px)}}
.hits li:not(.open) > *{opacity:.62}
.hits .rank{font-weight:700}
.hits .bar{height:9px;border:1px solid var(--ph);background:linear-gradient(90deg,var(--ph) var(--v),transparent var(--v))}
.hits .tool{color:#fff;font-weight:700;text-shadow:none}
.hits .title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hits blockquote{grid-column:2/-1;margin:8px 0 4px;padding-left:12px;border-left:2px solid var(--ph);color:#e9d9bd}
.hits mark{background:var(--ph);color:#17100a;text-shadow:none;padding:0 3px}
.hits .from{grid-column:2/-1;margin:4px 0 2px;font-size:.92em;color:#cdb892}
.src{color:var(--lamp);display:inline-block;min-width:8ch}
.screen figcaption,.strip figcaption{position:relative;padding:11px 22px 13px;border-top:1px solid #2a2118;font-size:14px;color:var(--on-panel-soft)}

/* how it works: three stops along one tape */
.how{padding:var(--section) 0 0}
.path{list-style:none;margin:54px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:40px;position:relative}
.path::before{content:"";position:absolute;left:0;right:0;top:22px;height:10px;background:var(--oxide);border-radius:5px}
.path li{position:relative}
.stop{display:grid;place-items:center;width:54px;height:54px;border-radius:50%;background:var(--panel);border:2px solid #000;box-shadow:0 0 0 5px var(--case)}
.stop svg{width:24px;height:24px;fill:var(--on-panel)}
.stop .rec{fill:var(--red)}
.path h3{margin-top:22px}
.path p{margin-top:10px;color:var(--ink-soft);max-width:26em}

/* principles */
.principles{padding:var(--section) 0}
.rules{margin-top:36px;border-top:2px solid var(--ink)}
.rules article{display:grid;grid-template-columns:1fr 1.6fr;gap:40px;padding:24px 0 26px;border-bottom:2px solid var(--ink)}
.rules p{color:var(--ink-soft);max-width:34em}

/* specifications: the data sheet printed on the inlay */
.specs{background:var(--paper);border-top:2px solid var(--ink);border-bottom:2px solid var(--ink);padding:var(--section) 0}
.specs-grid{display:grid;grid-template-columns:1fr 2fr;gap:56px;align-items:start}
.specs dl{margin:0;border-top:2px solid var(--ink)}
.specs dl div{display:grid;grid-template-columns:9.5em 1fr;gap:24px;padding:14px 0 13px;border-bottom:1px solid var(--ink)}
.specs dt{font-weight:700;font-stretch:87%}
.specs dd{margin:0}
.specs code{font-family:var(--mono);font-size:.84em;background:var(--case);padding:2px 6px;border-radius:3px}

/* status: side A and side B */
.status{padding:var(--section) 0}
.sides{margin-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.side{background:var(--panel);color:var(--on-panel);border-radius:8px;padding:26px 28px 14px}
.side h3{display:flex;align-items:center;gap:14px;padding-bottom:18px}
.letter{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--lamp);color:var(--ink);font-size:21px;flex:none}
.side ol{list-style:none;margin:0;padding:0;counter-reset:t}
.side li{counter-increment:t;display:grid;grid-template-columns:2.4em 1fr;padding:14px 0 12px;border-top:1px solid var(--panel-line)}
.side li::before{content:"A" counter(t);color:var(--lamp);font-weight:700}
.side-b{background:transparent;color:var(--ink);border:2px dashed var(--ink)}
.side-b .letter{background:none;border:2px solid var(--ink)}
.side-b li{border-top-color:var(--case-lo)}
.side-b li::before{content:"B" counter(t);color:var(--red)}

/* roadmap: voice input */
.voice{background:var(--panel);color:var(--on-panel);padding:var(--section) 0;margin-bottom:var(--section)}
.voice-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.voice-copy p{margin-top:18px;color:#cfccbf;max-width:30em}
.voice-copy .tagline{display:inline-block;margin:0 0 16px;padding:4px 10px 2px;border:2px dashed var(--amber);border-radius:var(--radius);color:var(--amber);font-size:var(--fs-small)}
.voice-copy .note{font-size:var(--fs-small);color:var(--on-panel-soft);border-top:1px solid var(--panel-line);padding-top:14px}
.strip{margin:0;background:#101012;border:2px solid #000;border-radius:12px;box-shadow:0 0 0 2px var(--panel-line);overflow:hidden}
.meter{display:flex;align-items:end;gap:4px;height:54px;padding:12px 22px 0}
.meter i{flex:1;height:100%;transform-origin:bottom;background:linear-gradient(var(--red) 0 18%,var(--amber) 18% 40%,var(--lamp) 40%);animation:level 1.3s ease-in-out infinite alternate}
.meter i:nth-child(3n){animation-duration:.9s}
.meter i:nth-child(3n+1){animation-duration:1.6s;animation-delay:-.5s}
.meter i:nth-child(4n){animation-delay:-.8s}
.meter i:nth-child(5n){animation-duration:1.1s;animation-delay:-.3s}
@keyframes level{from{transform:scaleY(.18)}to{transform:scaleY(.95)}}
.strip ul{list-style:none;margin:0;padding:16px 22px 6px}
.strip li{display:grid;grid-template-columns:4.2em 1fr;gap:10px;padding:6px 0;color:#cfccbf}
.strip time{font-family:var(--mono);font-size:.82em;color:var(--on-panel-soft);padding-top:3px}
.ask{margin:8px 22px 20px;padding:16px 18px;border-radius:8px;background:#2a2a2d}
.ask .q{font-weight:700;color:#fff}
.ask .a{margin-top:6px}
.ask .from{margin-top:10px;font-family:var(--mono);font-size:.8em;color:var(--on-panel-soft)}

/* questions */
.faq{padding:0 0 var(--section)}
.faq-grid{display:grid;grid-template-columns:1fr 2fr;gap:56px;align-items:start}
.faq details{border-top:2px solid var(--ink)}
.faq details:last-child{border-bottom:2px solid var(--ink)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;padding:18px 0 16px;font-size:21px;font-weight:700;font-stretch:87%}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;font-size:26px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 22px;color:var(--ink-soft);max-width:36em}

/* footer */
.site-foot{background:var(--panel);color:var(--on-panel);padding:64px 0 30px}
.foot-ask{color:var(--amber);font-size:19px}
.mail{display:inline-block;margin-top:6px;font-size:clamp(34px,6vw,80px);font-weight:700;font-stretch:87%;letter-spacing:-.015em;text-decoration:none;overflow-wrap:anywhere}
.mail:hover{color:var(--amber)}
.foot-row{margin-top:56px;padding-top:16px;border-top:1px solid var(--panel-line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 24px;font-size:var(--fs-small);color:var(--on-panel-soft)}

@media(max-width:900px){
  :root{--pad:20px;--section:60px;--fs-body:17px;--fs-lead:19px}
  .site-head nav{display:none}
  .head-row{justify-content:space-between}
  .hero{padding:40px 0 52px}
  .hero-grid,.demo-grid,.voice-grid,.specs-grid,.faq-grid{grid-template-columns:minmax(0,1fr);gap:36px}
  .specs-grid,.faq-grid{gap:26px}
  .term{font-size:12.5px;padding:16px}
  .typed{display:inline;white-space:normal;border-right:0;animation:none}
  .hits li{grid-template-columns:2ch 44px 1fr auto;row-gap:2px}
  .hits .title{grid-column:2/-1;white-space:normal}
  .path{grid-template-columns:1fr;gap:34px;margin-top:38px;padding-left:76px}
  .path::before{left:22px;right:auto;top:0;bottom:0;width:10px;height:auto}
  .stop{position:absolute;left:-76px;top:-6px}
  .path h3{margin-top:0}
  .rules article{grid-template-columns:1fr;gap:8px}
  .specs dl div{grid-template-columns:1fr;gap:2px}
  .sides{grid-template-columns:1fr}
  .stripes{height:28px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reel,.meter i,.hits li,.typed{animation:none}
  .btn{transition:none}
}