/* ================================================================
   bruhOS — carbon / acid. a living machine, not a slide deck.
   ================================================================ */

:root{
  --bg:#0d0e11;
  --bg2:#121318;
  --fg:#ecebe3;
  --dim:#8b8d84;
  --dim2:#55574f;
  --acid:#c8f542;
  --acid-soft:#c8f54222;
  --red:#ff5140;
  --line:#ecebe31a;
  --sans:'Bricolage Grotesque',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--fg);
  font-family:var(--sans);font-size:17px;line-height:1.55;font-weight:340;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  -webkit-tap-highlight-color:transparent;
}
::selection{background:var(--acid);color:var(--bg)}
a{color:inherit}
.mono{font-family:var(--mono);font-size:.72rem;letter-spacing:.03em;font-weight:400}
.acid{color:var(--acid)}
.dim2{color:var(--dim2)}
b{font-weight:640}

/* ============ boot veil ============ */
.boot{
  position:fixed;inset:0;z-index:400;background:var(--bg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.4rem;
  transition:transform .85s cubic-bezier(.83,0,.17,1);
}
.boot.done{transform:translateY(-101%)}
.boot-num{
  position:relative;line-height:.92;user-select:none;
  font-family:var(--sans);font-weight:800;letter-spacing:-.055em;
  font-size:clamp(7rem,26vw,19rem);
  font-variation-settings:"opsz" 96;
}
.boot-num i{
  font-style:normal;font-size:.3em;font-weight:700;letter-spacing:0;
  position:absolute;left:100%;bottom:.12em;              /* hangs off the right — digits stay optically centered */
}
.boot-ghost{display:block;color:transparent;-webkit-text-stroke:1.5px #3f4238}
.boot-solid{
  position:absolute;inset:0;color:var(--acid);
  clip-path:inset(100% 0 0 0);
  transition:clip-path .18s ease-out;
}
.boot-status{color:var(--dim);letter-spacing:.06em;min-height:1.2em;text-align:center;padding:0 1.2rem}
.boot-bar{position:absolute;bottom:0;left:0;right:0;height:2px;background:#ecebe314}
.boot-bar i{display:block;height:100%;background:var(--acid);transform-origin:left;transform:scaleX(0);transition:transform .18s ease-out}

/* ============ header ============ */
.hd{
  position:fixed;top:0;left:0;right:0;z-index:200;
  display:flex;align-items:center;justify-content:space-between;
  padding:.85rem 1.6rem;
}
.hd-logo{display:flex;align-items:center;text-decoration:none}
.hd-logo img{height:34px;width:auto;display:block}
.hd-nav{display:flex;gap:1.4rem;mix-blend-mode:difference}
.hd-docs{mix-blend-mode:difference}
.hd-nav a,.hd-docs{color:#fff;text-decoration:none;opacity:.75;transition:opacity .2s}
.hd-nav a:hover,.hd-docs:hover{opacity:1}
.hd-docs{color:var(--acid)}

/* ============ hero ============ */
.hero{min-height:100vh;display:flex;flex-direction:column;position:relative;
  background-image:radial-gradient(circle at 1px 1px,#ecebe30d 1px,transparent 0);
  background-size:34px 34px;
}
.hero-inner{padding:7.5rem 1.6rem 0;flex:0 0 auto}
.hero-pre{color:var(--dim);margin-bottom:.6rem}
.hero-word{
  font-size:clamp(5rem,19.5vw,17.5rem);
  font-weight:800;letter-spacing:-.055em;line-height:.86;
  font-variation-settings:"opsz" 96;
  display:flex;overflow:hidden;user-select:none;
}
.hl{display:inline-block;transform:translateY(115%)}
.hl-acid{color:var(--acid)}
.hero-line{
  display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;
  flex-wrap:wrap;padding:1.6rem 0 2rem;border-bottom:1px solid var(--line);
}
.hero-tag{font-size:clamp(1.05rem,2vw,1.4rem);line-height:1.4;font-weight:380;max-width:34ch}
.hero-tag b{color:var(--acid);font-weight:640}
.hero-sub{color:var(--dim);line-height:1.9;text-align:right}

/* walker stage */
.stage{flex:0 0 auto;display:flex;flex-direction:column;margin:0 1.6rem}
.stage-hud{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:.7rem 0;color:var(--dim);
}
.hud-state{color:var(--acid);font-weight:600}
.hud-state.fall{color:var(--red)}
#walker{width:100%;display:block;height:clamp(220px,30vh,360px)}
.stage-foot{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:.7rem 0 1rem;color:var(--dim2)}

.hero-scrollhint{
  position:absolute;right:1.6rem;bottom:1rem;color:var(--dim2);
  display:flex;align-items:center;gap:.6rem;
}
.sh-bar{width:46px;height:1px;background:var(--dim2);position:relative;overflow:hidden}
.sh-bar::after{content:"";position:absolute;inset:0;background:var(--acid);transform:translateX(-100%);animation:shb 1.8s ease infinite}
@keyframes shb{60%,100%{transform:translateX(100%)}}

/* ============ bands ============ */
.bands{position:relative;padding:4.5rem 0;overflow:hidden}
.band{overflow:hidden;white-space:nowrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band-a{transform:rotate(-2.2deg) scale(1.04);background:var(--acid)}
.band-a .band-track{color:var(--bg);font-weight:600}
.band-b{transform:rotate(1.6deg) scale(1.04);background:var(--bg2);margin-top:-.4rem}
.band-b .band-track{color:var(--dim)}
.band-track{display:inline-block;padding:.8rem 0;font-size:.82rem;will-change:transform}

/* ============ blocks ============ */
.blk{padding:9rem 1.6rem;max-width:1500px;margin:0 auto}
.blk-head{margin-bottom:3.4rem}
.blk-no{color:var(--acid);display:block;margin-bottom:1.6rem}
.blk-h{font-size:clamp(2.6rem,7vw,6rem);font-weight:750;letter-spacing:-.04em;line-height:.98}
.blk-h span{display:block;overflow:hidden}
.blk-h span>i,.blk-h span{font-style:normal}
.blk-h-sm{font-size:clamp(2rem,4.6vw,3.8rem);font-weight:720;letter-spacing:-.035em;line-height:1.04}

/* rise util */
[data-rise]{opacity:0;transform:translateY(34px)}

/* ============ 01 gap ============ */
.gap-copy{max-width:62ch;display:flex;flex-direction:column;gap:1.2rem;color:var(--dim);font-size:1.1rem;margin-bottom:4rem}
.gap-copy p:last-child{color:var(--fg)}
.waste{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.waste-card{background:var(--bg);padding:2.2rem 1.8rem 2.6rem;position:relative;transition:background .3s}
.waste-card:hover{background:var(--bg2)}
.waste-n{
  font-family:var(--mono);font-size:3.6rem;font-weight:300;color:transparent;
  -webkit-text-stroke:1px var(--dim2);display:block;margin-bottom:1.6rem;line-height:1;
}
.waste-card:hover .waste-n{-webkit-text-stroke:1px var(--acid)}
.waste-card h3{font-size:1.25rem;font-weight:680;letter-spacing:-.02em;margin-bottom:.7rem}
.waste-card p{color:var(--dim);font-size:.95rem}
.gap-thesis{
  margin-top:4.5rem;font-size:clamp(1.3rem,2.6vw,1.9rem);line-height:1.35;
  font-weight:460;letter-spacing:-.015em;max-width:52ch;
}
.gap-thesis em{color:var(--acid);font-style:normal}

/* ============ 02 flow (pinned) ============ */
.flow{position:relative}
.flow-pin{
  min-height:100vh;display:flex;flex-direction:column;justify-content:center;
  padding:6rem 1.6rem 4rem;max-width:1500px;margin:0 auto;
}
.flow-head{margin-bottom:2.6rem}
.flow-stagewrap{position:relative}
.flow-cmd{
  display:inline-block;border:1px solid var(--acid);color:var(--acid);
  padding:.6rem 1rem;margin-bottom:2.4rem;font-style:italic;
  box-shadow:0 0 24px var(--acid-soft);
}
.flow-rail{height:2px;background:var(--line);margin-bottom:2rem;position:relative}
.flow-railfill{position:absolute;inset:0;background:var(--acid);transform-origin:left;transform:scaleX(0)}
.flow-stages{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.flow-st{
  border-top:2px solid var(--line);padding-top:1.2rem;
  opacity:.22;transition:opacity .45s ease;
}
.flow-st.on{opacity:1}
.flow-st.on{border-top-color:var(--acid)}
.fst-tag{color:var(--acid);display:block;margin-bottom:.7rem}
.flow-st h3{font-size:1.3rem;font-weight:680;letter-spacing:-.02em;margin-bottom:.6rem}
.flow-st p{color:var(--dim);font-size:.92rem}
.flow-st b{color:var(--fg)}
.flow-json{margin-top:2.4rem;color:var(--dim);opacity:0}
.flow-forbid{
  margin-top:1.2rem;display:inline-block;color:var(--red);border:1px dashed var(--red);
  padding:.7rem 1rem;opacity:0;background:#ff514011;
}

/* ============ 03 skills ============ */
.sk-list{list-style:none;border-top:1px solid var(--line)}
.sk{
  display:grid;grid-template-columns:4rem 1fr auto;align-items:baseline;gap:1.6rem;
  padding:1.05rem .4rem;border-bottom:1px solid var(--line);
  transition:background .25s,padding .25s;cursor:default;
}
.sk:hover{background:var(--bg2);padding-left:1.2rem}
.sk-i{color:var(--dim2)}
.sk-name{
  font-size:clamp(1.6rem,3.6vw,2.9rem);font-weight:700;letter-spacing:-.03em;line-height:1.05;
  font-family:var(--mono);font-weight:600;letter-spacing:-.05em;
}
.sk-d{color:var(--dim);text-align:right}
.sk:hover .sk-name{color:var(--acid)}
.sk-acid .sk-name{color:var(--acid)}
.sk-red .sk-name{color:var(--red)}
.sk-red:hover .sk-name{color:var(--red)}
.sk-note{margin-top:2rem;color:var(--dim2)}

/* ============ 04 delta ============ */
.dl{display:flex;flex-direction:column;gap:.9rem}
.dl-row{
  display:grid;grid-template-columns:1fr 1fr;gap:2.4rem;align-items:center;
  border:1px solid var(--line);padding:1.5rem 1.8rem;background:var(--bg);
}
.dl-was{color:var(--dim2);position:relative;font-size:1.02rem}
.dl-was::after{
  content:"";position:absolute;left:0;top:52%;height:1.5px;width:100%;
  background:var(--red);transform:scaleX(var(--strike,0));transform-origin:left;
}
.dl-now{font-size:1.14rem;font-weight:560;letter-spacing:-.01em}
.dl-now::before{content:"→ ";color:var(--acid)}

/* ============ 05 stack ============ */
.stk{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.stk-col{background:var(--bg);padding:2rem 1.7rem 2.4rem}
.stk-h{color:var(--acid);margin-bottom:1.6rem;font-weight:600}
.stk-h i{font-style:normal;margin-right:.4rem}
.stk-note{color:var(--dim2);margin:-0.8rem 0 1.4rem;line-height:1.7}
.stk dl{display:flex;flex-direction:column}
.stk dl>div{padding:1rem 0;border-bottom:1px solid var(--line)}
.stk dl>div:last-child{border-bottom:none}
.stk dt{font-weight:640;letter-spacing:-.015em;margin-bottom:.25rem;font-size:1rem}
.stk dd{color:var(--dim);font-size:.88rem;line-height:1.5}

/* ============ 06 data ============ */
.trace{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;counter-reset:tr}
.trace-step{border-top:2px solid var(--acid);padding-top:1.2rem}
.ts-v{color:var(--acid)}
.trace-step h3{font-size:1.2rem;font-weight:680;letter-spacing:-.02em;margin:.6rem 0 .5rem}
.trace-step p{color:var(--dim);font-size:.92rem}
.hardrule{
  margin-top:3.4rem;border:1px solid var(--acid);padding:1.6rem 1.8rem;
  display:flex;gap:1.8rem;align-items:baseline;background:var(--acid-soft);
}
.hardrule .mono{color:var(--acid);flex-shrink:0}
.hardrule p{font-size:1.15rem;font-weight:480}
.hardrule b{color:var(--acid)}

/* ============ 07 roadmap ============ */
.road{position:relative}
.road-pin{min-height:100vh;display:flex;flex-direction:column;justify-content:center;overflow:hidden;padding:5rem 0 3rem}
.road-head{padding:0 1.6rem;max-width:1500px;margin:0 auto 3rem;width:100%}
.road-hint{color:var(--dim2);font-size:.75rem;letter-spacing:.05em}
.road-track{display:flex;gap:1.6rem;padding:0 1.6rem;width:max-content;will-change:transform}
.road-card{
  width:min(66vw,620px);flex-shrink:0;border:1px solid var(--line);background:var(--bg2);
  padding:2.6rem 2.4rem 2.8rem;display:flex;flex-direction:column;gap:1.2rem;
}
.road-card-last{border-color:var(--acid)}
.rc-v{
  font-family:var(--mono);font-size:clamp(3rem,6vw,5rem);font-weight:300;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--acid);
}
.road-card h3{font-size:clamp(1.4rem,2.6vw,2rem);font-weight:700;letter-spacing:-.025em;line-height:1.1}
.road-card p{color:var(--dim);font-size:1rem;max-width:46ch}
.rc-tag{color:var(--dim2);margin-top:auto}

/* ============ 08 proof ============ */
.proof-list{list-style:none;display:flex;flex-direction:column;border-top:1px solid var(--line)}
.proof-list li{
  display:flex;gap:2rem;align-items:baseline;padding:1.6rem .4rem;
  border-bottom:1px solid var(--line);font-size:clamp(1.05rem,2vw,1.4rem);
  font-weight:440;letter-spacing:-.01em;
}
.proof-list .mono{color:var(--acid);flex-shrink:0;width:2.2rem}
.proof-list b{color:var(--acid)}
.proof-fail{background:#ff514010}
.proof-fail .mono{color:var(--red)}
.proof-fail{color:var(--fg)}

/* ============ closing ============ */
.fin{padding:10rem 1.6rem 6rem;max-width:1500px;margin:0 auto}
.fin-fillwrap{position:relative;margin-bottom:4rem}
.fin-big{
  font-size:clamp(3.4rem,11.5vw,10.5rem);font-weight:800;letter-spacing:-.05em;line-height:.92;
  text-transform:uppercase;
}
.fin-ghost{color:transparent;-webkit-text-stroke:1px var(--dim2)}
.fin-solid{
  position:absolute;inset:0;color:var(--acid);
  clip-path:inset(0 100% 0 0);
}
.fin-copy{max-width:58ch;font-size:1.2rem;line-height:1.6;color:var(--dim);margin-bottom:3rem}
.fin-links{display:flex;gap:2.4rem;align-items:center}
.fin-links a{color:var(--acid);text-decoration:none;border:1px solid var(--acid);padding:.8rem 1.3rem;transition:all .25s}
.fin-links a:hover{background:var(--acid);color:var(--bg);box-shadow:0 0 34px var(--acid-soft)}
.fin-links span{color:var(--dim2)}

/* ============ footer ============ */
.ft{
  border-top:1px solid var(--line);padding:1.4rem 1.6rem 2rem;
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:var(--dim2);
}

/* ============ responsive ============ */
@media(max-width:1000px){
  .waste{grid-template-columns:1fr}
  .flow-stages{grid-template-columns:1fr 1fr;gap:2rem 1.4rem}
  .stk{grid-template-columns:1fr}
  .trace{grid-template-columns:1fr 1fr}
  .hero-sub{text-align:left}
}

/* ---- mobile: app-grade ---- */
@media(max-width:768px){
  body{font-size:16px}

  /* boot: bigger digits on phone */
  .boot-num{font-size:min(36vw,11rem)}

  /* frosted app bar */
  .hd{
    padding:.7rem 1.1rem;
    padding-top:calc(.7rem + env(safe-area-inset-top));
    background:rgba(13,14,17,.78);
    -webkit-backdrop-filter:blur(18px) saturate(1.3);
    backdrop-filter:blur(18px) saturate(1.3);
    border-bottom:1px solid #ecebe310;
  }
  .hd-nav{display:none}
  .hd-logo img{height:26px}
  .hd-docs{mix-blend-mode:normal;opacity:1;border:1px solid var(--acid);padding:.4rem .7rem;font-size:.66rem}

  /* hero */
  .hero{min-height:100svh}
  .hero-inner{padding:5.8rem 1.1rem 0}
  .hero-pre{font-size:.62rem}
  .hero-word{font-size:23.5vw}
  .hero-line{padding:1.2rem 0 1.3rem;gap:1rem}
  .hero-tag{font-size:1.04rem}
  .hero-sub{font-size:.6rem;line-height:1.8}
  .stage{margin:0 1.1rem}
  .stage-hud{font-size:.58rem;padding:.55rem 0}
  .hud-r{display:none}
  #walker{height:clamp(190px,27vh,300px)}
  .stage-foot{font-size:.58rem;padding:.55rem 0 .9rem}
  .hero-scrollhint{right:1.1rem;bottom:.8rem;font-size:.6rem}

  /* sections */
  .blk{padding:5.5rem 1.1rem}
  .blk-head{margin-bottom:2.2rem}
  .blk-no{margin-bottom:1.1rem}
  .gap-copy{font-size:1rem;margin-bottom:2.6rem}
  .waste-card{padding:1.7rem 1.4rem 2rem}
  .waste-n{font-size:2.8rem;margin-bottom:1.1rem}
  .gap-thesis{margin-top:3rem}

  /* flow: unpinned, stacked cards */
  .flow-pin{min-height:auto;padding:5.5rem 1.1rem 3.5rem}
  .flow-stages{grid-template-columns:1fr;gap:1.5rem}
  .flow-cmd{font-size:.66rem;margin-bottom:1.8rem}
  .flow-json{font-size:.6rem;white-space:normal;word-break:break-word}
  .flow-forbid{font-size:.6rem}

  /* skills */
  .sk{grid-template-columns:2.2rem 1fr;gap:.7rem;padding:.95rem .2rem}
  .sk-name{font-size:1.42rem}
  .sk-d{grid-column:2;text-align:left;font-size:.6rem}
  .sk:hover{padding-left:.2rem}

  /* delta / stack / data */
  .dl-row{grid-template-columns:1fr;gap:.7rem;padding:1.15rem 1.1rem}
  .dl-was{font-size:.94rem}
  .dl-now{font-size:1.04rem}
  .stk-col{padding:1.6rem 1.3rem 1.9rem}
  .trace{grid-template-columns:1fr;gap:1.2rem}
  .hardrule{flex-direction:column;gap:.7rem;padding:1.25rem 1.2rem;margin-top:2.4rem}
  .hardrule p{font-size:1.02rem}

  /* roadmap: native swipe deck with snap */
  .road-pin{min-height:auto;padding:5.5rem 0 3.5rem}
  .road-head{margin-bottom:2rem;padding:0 1.1rem}
  .road-track{
    width:auto;overflow-x:auto;
    scroll-snap-type:x mandatory;
    padding:0 1.1rem 1.2rem;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .road-track::-webkit-scrollbar{display:none}
  .road-card{width:84vw;scroll-snap-align:center;padding:1.9rem 1.5rem 2.2rem;gap:1rem}

  /* proof / closing / footer */
  .proof-list li{font-size:.98rem;gap:1rem;padding:1.25rem .2rem}
  .proof-list .mono{width:1.8rem}
  .fin{padding:6.5rem 1.1rem 4rem}
  .fin-fillwrap{margin-bottom:2.6rem}
  .fin-copy{font-size:1.02rem;margin-bottom:2.2rem}
  .fin-links{flex-wrap:wrap;gap:1.1rem}
  .ft{
    flex-direction:column;gap:.45rem;
    padding:1.3rem 1.1rem calc(1.6rem + env(safe-area-inset-bottom));
  }
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .hl{transform:none}
  [data-rise]{opacity:1;transform:none}
  .boot{display:none}
}