/* Paraq Labs — landing. One deliberate visual world (ink / paper / journal) taken from the pitch deck;
   section grounds are sampled from the illustrations so the clips melt into the page. */
:root{
  --ink:#0C1013; --paper:#F4F0E6; --sci:#DFD9C9; --lime:#BCFA00; --red:#FF5A4E;
  --on-ink:#F2EFE8; --on-ink-soft:#A7B0BC; --on-ink-mute:#858E9B; --line-ink:#262C34; --card-ink:#141A1F;
  --on-paper:#111418; --on-paper-soft:#4A5058; --on-paper-mute:#666C74; --line-paper:#D6D0C1; --card-paper:#FBF9F4;
  --line-sci:#BDB49F; --on-lime:#1B2300;
  --sans:'IBM Plex Sans','Helvetica Neue',Arial,sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;
  --serif:'PT Serif',Georgia,'Times New Roman',serif;
  --gut:clamp(16px,5.2vw,112px);
  --maxw:1440px;
  --hdr:68px;
  color-scheme:dark;
}
:lang(zh){--sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;--serif:'Noto Serif SC','Songti SC',serif}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--hdr);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink);color:var(--on-ink);font-family:var(--sans);font-size:18px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,p,ol,ul{margin:0}
h1,h2,h3{text-wrap:balance;font-weight:600}
img,video{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:100;background:var(--lime);color:var(--on-lime);padding:8px 12px}

/* ---------- type ---------- */
.h1{font-size:clamp(42px,5.4vw,92px);line-height:1.03;letter-spacing:-.025em}
.h2{font-size:clamp(34px,4.4vw,64px);line-height:1.08;letter-spacing:-.015em}
.h3{font-size:clamp(20px,1.7vw,26px);line-height:1.25}
.h3.big{font-size:clamp(22px,2.1vw,32px)}
.lead{font-size:clamp(19px,1.9vw,28px);line-height:1.4;color:var(--soft)}
.body{font-size:clamp(16px,1.25vw,19px);line-height:1.55;color:var(--soft)}
.body.strong{color:var(--fg)}
.label{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
:lang(zh) .label{letter-spacing:.06em}
.label.lime{color:var(--lime)}
.paper .label.lime,.sci .label.lime{color:var(--on-paper)}
.soft{color:var(--soft)}
.pill{align-self:flex-start;font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;background:var(--lime);color:var(--on-lime);padding:6px 12px;border-radius:6px}
.hl{background:linear-gradient(transparent 60%, rgba(188,250,0,.85) 60%) no-repeat 0 0 / 0% 100%;transition:background-size .9s cubic-bezier(.2,.7,.2,1) .25s;color:inherit}
.ink .hl{background:none;color:var(--lime)}
.in .hl,.in.hl,.no-anim .hl{background-size:100% 100%}

/* ---------- sections ---------- */
.sec{position:relative;padding-block:clamp(72px,11vw,160px);overflow:hidden}
.sec.tight-top{padding-top:0}
.ink{background:var(--ink);color:var(--on-ink);--fg:var(--on-ink);--soft:var(--on-ink-soft);--mute:var(--on-ink-mute);--line:var(--line-ink);--card:var(--card-ink)}
.paper{background:var(--paper);color:var(--on-paper);--fg:var(--on-paper);--soft:var(--on-paper-soft);--mute:var(--on-paper-mute);--line:var(--line-paper);--card:var(--card-paper)}
.sci{background:var(--sci);color:var(--on-paper);--fg:var(--on-paper);--soft:var(--on-paper-soft);--mute:var(--on-paper-mute);--line:var(--line-sci);--card:#EAE4D7}
.wrap{width:100%;max-width:calc(var(--maxw) + 2*var(--gut));margin-inline:auto;padding-inline:var(--gut)}
.stack{display:flex;flex-direction:column;gap:22px}
.split{display:grid;gap:clamp(32px,5vw,80px);align-items:center}
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,40px);margin-top:clamp(40px,6vw,80px)}
.cols4{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,2.4vw,36px);margin-top:clamp(40px,5vw,64px)}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:28px 40px}
.ruled{border-top:2px solid var(--fg);padding-top:16px;display:flex;flex-direction:column;gap:8px}
.ink .ruled{border-top-color:var(--line)}
.narrow{max-width:760px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px;display:flex;flex-direction:column;gap:8px}
.card.lime-border{border:2px solid var(--lime)}
.light{color:var(--on-ink)}

/* ---------- animations: no frame, no ground ---------- */
.anim{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;
  -webkit-mask-image:linear-gradient(to right,transparent,#000 5%,#000 95%,transparent),linear-gradient(to bottom,transparent,#000 6%,#000 94%,transparent);
  -webkit-mask-composite:source-in;
  mask-image:linear-gradient(to right,transparent,#000 5%,#000 95%,transparent),linear-gradient(to bottom,transparent,#000 6%,#000 94%,transparent);
  mask-composite:intersect}
.ink .anim{mix-blend-mode:lighten}
.paper .anim,.sci .anim{mix-blend-mode:darken}
.plate .anim{aspect-ratio:1/1}
.media-bleed{margin-right:calc(-1 * var(--gut))}

/* ---------- reveal on scroll ---------- */
.js .rv{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.2,1) var(--d,0s),transform .9s cubic-bezier(.2,.7,.2,1) var(--d,0s)}
.js .rv.in{opacity:1;transform:none}
.no-anim .rv{opacity:1!important;transform:none!important;transition:none!important}

/* ---------- header ---------- */
.hdr{position:fixed;inset:0 0 auto 0;z-index:50;height:calc(var(--hdr) + env(safe-area-inset-top,0px));padding:env(safe-area-inset-top,0px) var(--gut) 0;
  display:flex;align-items:center;gap:20px;color:var(--on-ink);transition:background .35s ease,backdrop-filter .35s ease,box-shadow .35s ease}
.hdr.solid{background:rgba(12,16,19,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 1px 0 rgba(242,239,232,.07)}
.prog{position:absolute;left:0;top:0;height:2px;width:0;background:var(--lime)}
.brand img{width:108px;height:auto}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{text-decoration:none;font-size:15px;color:var(--on-ink-soft);position:relative;padding:6px 0;transition:color .2s}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform .35s ease}
.nav a:hover,.nav a.act{color:var(--on-ink)}
.nav a.act::after{transform:scaleX(1)}
.langs{display:flex;border:1px solid rgba(242,239,232,.16);border-radius:999px;padding:3px}
.langs button{white-space:nowrap;background:none;border:0;border-radius:999px;padding:5px 11px;font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;color:var(--on-ink-soft)}
.langs button[aria-pressed="true"]{background:var(--on-ink);color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;border-radius:999px;padding:12px 22px;font-weight:600;font-size:16px;transition:transform .2s ease,box-shadow .2s ease,background .2s}
.btn-lime{background:var(--lime);color:var(--on-lime)}
.btn-lime:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(188,250,0,.25)}
.btn-ghost{border:1px solid rgba(242,239,232,.28);color:var(--on-ink)}
.btn-ghost:hover{border-color:var(--on-ink)}
.hdr-cta{padding:9px 16px;font-size:14px}
.menu-btn{display:none;background:none;border:1px solid rgba(242,239,232,.2);border-radius:999px;padding:7px 14px;font-size:14px}

/* ---------- hero ---------- */
.hero{min-height:100svh;display:flex;align-items:center;padding-top:calc(var(--hdr) + 40px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(24px,4vw,64px);align-items:center}
.hero-text{display:flex;flex-direction:column;gap:26px}
.hero-media .anim{aspect-ratio:1.37/1;object-position:50% 46%}
.ctas{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.ctas .label a{color:inherit;text-transform:none;letter-spacing:.04em;text-decoration:underline;text-decoration-color:currentColor;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .2s}
.ctas .label a:hover{color:var(--lime)}
.scroll-cue{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;text-decoration:none;font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-ink-mute)}
.scroll-cue i{width:1px;height:42px;background:linear-gradient(var(--lime),transparent);animation:cue 2.2s ease-in-out infinite;transform-origin:top}
@keyframes cue{0%{transform:scaleY(0)}50%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}

/* ---------- problem / cicd / idea / mod ---------- */
.problem-grid{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}
.cicd-grid{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);margin-bottom:clamp(40px,6vw,72px)}
.flow{--fgap:clamp(30px,2.6vw,40px);list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:18px var(--fgap)}
.flow li{position:relative;border:2px solid var(--on-paper);border-radius:12px;padding:16px 18px;background:var(--card-paper);display:flex;flex-direction:column;gap:4px}
.flow li b{font-size:clamp(17px,1.3vw,21px)}
.flow li span{font-size:15px;line-height:1.35;color:var(--on-paper-soft)}
/* connector drawn in the gap: a centred shaft (::before) and a chevron head (::after) */
/* one crisp SVG arrow, 24x12, centred in the gap; no rotated borders, so no sub-pixel wobble */
.flow li:not(:last-child)::after{content:"";position:absolute;top:calc(50% - 6px);left:calc(100% + 2px + (var(--fgap) - 24px) / 2);width:24px;height:12px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='12' viewBox='0 0 24 12'%3E%3Cpath d='M1 6h20.5M16.5 1.5 21.5 6l-5 4.5' fill='none' stroke='%23111418' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/24px 12px no-repeat}
.flow li.last{background:var(--lime)}
.flow li.last span{color:var(--on-lime)}
.idea-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.tbl{display:flex;flex-direction:column;margin-top:6px}
.tr{display:grid;grid-template-columns:34% 1fr;gap:16px;padding:13px 0;border-top:1px solid var(--line);font-size:clamp(15px,1.15vw,18px)}
.tr span:first-child{color:var(--on-ink);font-weight:500}
.tr span:last-child{color:var(--on-ink-soft)}
.tr.th{border-top:0;padding-top:0;font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase}
.tr.th span{color:var(--lime)!important;font-weight:400}
.mod-grid{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}

/* ---------- scheme ---------- */
.scheme-wrap{margin-top:clamp(28px,4vw,56px);position:relative;aspect-ratio:1696/560}
.scheme{position:absolute;left:var(--gut);top:0;width:1696px;height:560px;transform-origin:0 0;transform:scale(var(--s,.8))}
.scheme .b{position:absolute;width:370px;height:190px;border:2px solid var(--on-paper);border-radius:12px;background:var(--card-paper);padding:16px 20px;display:flex;flex-direction:column;gap:6px}
.scheme .b.k{height:170px;background:var(--on-paper)}
.scheme .b b{font-size:28px;font-weight:600}
.scheme .b span{font-size:22px;line-height:1.3;color:var(--on-paper-soft)}
.scheme .b.k b{color:var(--lime)}
.scheme .b.k span{color:#B5BCC6}
.scheme .b.accent{box-shadow:inset 0 0 0 3px var(--lime)}
.scheme .chip{position:absolute;height:56px;width:200px;border-radius:12px;display:grid;place-items:center;font-family:var(--mono);font-size:21px}
.scheme .chip.dash{border:2px dashed var(--on-paper-mute);color:var(--on-paper-soft)}
.scheme .chip.lime{background:var(--lime);border:2px solid var(--on-paper);color:var(--on-lime);font-weight:600}
.scheme .note{position:absolute;font-size:21px;color:var(--on-paper-mute)}
.scheme svg{position:absolute;inset:0}
.js .scheme .draw{stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset .7s ease calc(.25s + var(--i) * .18s)}
.js .scheme .fadeline{opacity:0;transition:opacity .8s ease calc(.4s + var(--i) * .18s)}
.js .scheme .pop{opacity:0;transform:translateY(16px) scale(.97);transition:opacity .6s ease calc(var(--i) * .12s),transform .6s cubic-bezier(.2,.7,.2,1) calc(var(--i) * .12s)}
.js .scheme-wrap.in .draw{stroke-dashoffset:0}
.js .scheme-wrap.in .fadeline{opacity:1}
.js .scheme-wrap.in .pop{opacity:1;transform:none}
.steps-mobile{display:none;list-style:none;padding-top:24px;gap:12px;flex-direction:column}
.steps-mobile li{border:2px solid var(--on-paper);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:4px;background:var(--card-paper)}
.steps-mobile li span{color:var(--on-paper-soft);font-size:15px}
.steps-mobile li.accent{box-shadow:inset 0 0 0 3px var(--lime)}
.steps-mobile li.k{background:var(--on-paper);color:var(--on-ink)}
.steps-mobile li.k b{color:var(--lime)}
.steps-mobile li.k span{color:#B5BCC6}

/* ---------- tech / moat items ---------- */
.tech-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}
.moat-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}
.item{display:grid;grid-template-columns:minmax(64px,auto) 1fr;column-gap:20px;row-gap:4px;padding-top:16px;border-top:1px solid var(--line)}
.item .n{font-family:var(--mono);font-size:13px;color:var(--lime);grid-row:span 2;padding-top:5px;white-space:nowrap}
.tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-ink-mute);border:1px solid var(--line);border-radius:999px;padding:2px 8px;vertical-align:middle;font-weight:400}

/* ---------- examples ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap}
.tabs button{background:transparent;border:1px solid var(--line);border-radius:999px;padding:9px 18px;color:var(--on-ink-soft);font-size:15px;transition:background .2s,color .2s,border-color .2s}
.tabs button[aria-selected="true"]{background:var(--on-ink);color:var(--ink);border-color:var(--on-ink)}
.panel{margin-top:clamp(28px,4vw,48px);display:flex;flex-direction:column;gap:28px}
.panel[hidden]{display:none}
.panel.show{animation:panelIn .5s cubic-bezier(.2,.7,.2,1)}
@keyframes panelIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.ex-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start}
.draft{border:2px dashed var(--on-ink-mute);border-radius:14px;padding:clamp(20px,2.4vw,32px);display:flex;flex-direction:column;gap:14px;background:var(--card-ink)}
/* finding marker: a highlighter stroke sweeps under the words (left -> right), text darkens as it passes */
.mk{color:inherit;border-radius:.3em .12em .34em .14em;padding:0 .1em;margin:0 -.1em;background:linear-gradient(100deg,var(--lime),#D2FF3A) no-repeat 0 58%/0% 84%;-webkit-box-decoration-break:clone;box-decoration-break:clone;transition:background-size .28s cubic-bezier(.4,0,.2,1),color .18s ease}
.mk.on{background-size:100% 84%;color:var(--on-lime);transition:background-size .55s cubic-bezier(.65,0,.25,1) var(--mk-d,0s),color .25s ease calc(var(--mk-d,0s) + .1s)}
.findings{display:flex;flex-direction:column;gap:10px}
.hint{margin-bottom:4px}
.finding{display:flex;flex-direction:column;gap:3px;border-top:1px solid var(--line);padding:12px 12px 12px 0;border-radius:4px;cursor:default;transition:background .2s,padding .2s}
.finding:hover,.finding:focus{background:rgba(188,250,0,.06);padding-left:12px;outline:none}
.finding b{font-family:var(--mono);font-weight:400;font-size:14px;color:var(--lime)}
.finding span{font-size:clamp(15px,1.2vw,18px);line-height:1.45}
.final{border:2px solid var(--lime);border-radius:14px;padding:clamp(18px,2vw,26px) clamp(20px,2.4vw,30px);display:flex;gap:24px;align-items:center;background:var(--card-ink)}
.final > div{display:flex;flex-direction:column;gap:6px}
.track{height:12px;border-radius:4px;background:var(--line-ink);overflow:hidden}
.track i{display:block;height:100%;width:0;background:var(--lime);border-radius:4px;transition:width 1.1s cubic-bezier(.2,.7,.2,1) .5s}
.track.ask i{background:var(--on-ink-soft)}

/* Observatory card (script example): KPIs, scene rhythm + cast on one scene axis, dialogue split, findings */
.final.obs-card{flex-direction:column;align-items:stretch;gap:clamp(16px,1.8vw,22px);padding:clamp(18px,2.2vw,30px)}
.final.obs-card > .obs-head{flex-direction:row;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 18px}
.final.obs-card > .kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line-ink);border:1px solid var(--line-ink);border-radius:10px;overflow:hidden}
.kpi{background:var(--card-ink);padding:clamp(12px,1.4vw,18px) clamp(14px,1.6vw,20px);display:flex;flex-direction:column;gap:4px;min-width:0}
.kpi b{font-size:clamp(28px,3vw,44px);line-height:1.05;font-weight:600;letter-spacing:-.02em;color:var(--on-ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.kpi b small{font-size:.5em;font-weight:500;color:var(--on-ink-mute);letter-spacing:0}
.kpi > span{font-size:14px;line-height:1.35;color:var(--on-ink-soft)}
.kpi.warn b{color:var(--red)}
.kpi.hot b{color:var(--lime)}
.final.obs-card > .obs-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr);grid-template-rows:auto 1fr;gap:clamp(12px,1.4vw,18px)}
.pane{border:1px solid var(--line-ink);border-radius:10px;padding:clamp(14px,1.6vw,20px);display:flex;flex-direction:column;gap:14px;min-width:0}
.pane-scenes{grid-row:span 2}
.pane-hd{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 18px}
.lg{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px;color:var(--on-ink-soft)}
.lg li{display:flex;align-items:center;gap:7px}
.lg.col{flex-direction:column;gap:10px;font-size:14px}
.lg em{font-style:normal;font-family:var(--mono);color:var(--on-ink);margin-left:auto;padding-left:12px}
.sw{width:12px;height:12px;border-radius:3px;display:inline-block;flex:none}
.sw.this{background:var(--lime)}
.sw.long{background:var(--red)}
.sw.typo{box-shadow:inset 0 0 0 2px var(--red)}
.sw.dlg{background:var(--lime)}
.sw.act{background:#3A424C}

/* scenes: 58 columns share one grid with the cast rows */
.scn{flex:1;display:grid;grid-template-columns:auto repeat(58,minmax(0,1fr));grid-template-rows:minmax(clamp(110px,11vw,150px),1fr) repeat(3,12px) auto;column-gap:2px;row-gap:7px;align-items:end;position:relative}
.scn .nm{grid-column:1;align-self:center;font-size:13px;line-height:1;color:var(--on-ink-soft);padding-right:12px;white-space:nowrap}
.scn .bar{grid-row:1;align-self:end;height:calc(var(--h) * 1%);background:#4A535E;border-radius:2px 2px 0 0;transform-origin:50% 100%;transform:scaleY(0);transition:transform .7s cubic-bezier(.2,.7,.2,1) calc(var(--i) * 12ms);position:relative;z-index:1}
.scn .bar.long{background:var(--red)}
.scn .bar.this{background:var(--lime)}
.scn .band{grid-row:1 / 5;align-self:stretch;margin:-6px -1px;border-radius:4px;background:rgba(188,250,0,.1);box-shadow:inset 0 0 0 1px rgba(188,250,0,.35);opacity:0;transition:opacity .5s ease .9s}
.scn .norm{align-self:end;height:calc(var(--n) * 1%);border-top:1px dashed rgba(242,239,232,.5);position:relative;z-index:2;pointer-events:none}
.scn .norm em{position:absolute;right:0;top:-19px;font-style:normal;font-family:var(--mono);font-size:11.5px;color:var(--on-ink-soft);background:var(--card-ink);padding:0 0 0 6px}
.scn .cell{align-self:stretch;border-radius:2px;background:var(--line-ink);opacity:0;transition:opacity .35s ease calc(.35s + var(--i) * 9ms);position:relative;z-index:1}
.scn .cell.y{background:#6B7580}
.scn .cell.y.r1{background:rgba(188,250,0,.75)}
.scn .cell.typo{background:transparent;box-shadow:inset 0 0 0 2px var(--red)}
.scn .ax{align-self:start;font-family:var(--mono);font-size:11.5px;color:var(--on-ink-mute);padding-top:2px}
.scn .ax.mid{text-align:center;letter-spacing:.12em;text-transform:uppercase}
.scn .ax.end{text-align:right}
.obs-card.on .scn .bar{transform:none}
.obs-card.on .scn .cell,.obs-card.on .scn .band{opacity:1}

/* dialogue / action donut */
.split-row{display:flex;align-items:center;gap:clamp(14px,2vw,24px)}
.split-row .lg{flex:1}
.donut{position:relative;width:clamp(96px,8.5vw,124px);aspect-ratio:1;flex:none}
.donut svg{width:100%;height:100%;transform:rotate(-90deg);display:block}
.donut circle{fill:none;stroke-width:6}
.donut .d-bg{stroke:#3A424C}
.donut .d-v{stroke:var(--lime);stroke-dasharray:100px 100px;stroke-dashoffset:100px;transition:stroke-dashoffset 1.2s cubic-bezier(.2,.7,.2,1) .3s}
.obs-card.on .donut .d-v{stroke-dashoffset:calc((100 - var(--v)) * 1px)}
.donut b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;white-space:nowrap;font-size:clamp(18px,1.6vw,22px);font-weight:600;color:var(--on-ink);font-variant-numeric:tabular-nums}

/* findings by layer */
.fbars{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px 14px;align-items:center;font-size:14px;color:var(--on-ink-soft)}
.fbars .v{font-family:var(--mono);color:var(--on-ink);min-width:2ch;text-align:right}
.obs-card.on .track i{width:var(--w)}
.fnote{margin:0;font-size:13px;line-height:1.45;color:var(--on-ink-mute)}
.no-anim .obs-card .scn .bar{transform:none;transition:none}
.no-anim .obs-card .scn .cell,.no-anim .obs-card .scn .band{opacity:1;transition:none}
.no-anim .obs-card .donut .d-v{stroke-dashoffset:calc((100 - var(--v)) * 1px);transition:none}
.no-anim .obs-card .track i{width:var(--w);transition:none}
.screenplay .sp{font-family:var(--mono);font-size:clamp(14px,1.15vw,17px);line-height:1.6;color:var(--on-ink-soft)}
.screenplay .head,.screenplay .who{color:var(--on-ink)}
.screenplay .who{padding-left:28%}
.screenplay .line{padding-left:14%}
.note-line{color:var(--on-ink-mute)}

/* ---------- observatory ---------- */
.obs{background:#0B0F12;color:var(--on-ink);--fg:var(--on-ink);--soft:var(--on-ink-soft);--mute:var(--on-ink-mute);--line:rgba(242,239,232,.18);min-height:100svh;display:flex;align-items:center}
.obs .sky{position:absolute;inset:-6% 0 auto 0;width:100%;height:112%;object-fit:cover;object-position:28% 50%;transform:translate3d(0,var(--py,0px),0)}
.obs .sky-scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,15,18,0) 34%,rgba(11,15,18,.6) 54%,rgba(11,15,18,.88) 72%)}
.obs-inner{position:relative;display:flex;justify-content:flex-end}
.obs-text{width:min(600px,100%)}
.q{display:flex;flex-direction:column;gap:5px;border-top:1px solid var(--line);padding-top:14px}
.q .when{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--lime)}

/* ---------- bridge (product -> method): the journal sheet slides up over the pinned product screen ---------- */
.bridge{position:relative;background:var(--ink)}
.b-ink{position:sticky;top:0;height:100svh;display:flex;align-items:center;background:var(--ink);color:var(--on-ink);overflow:hidden}
.b-ink-in{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:clamp(28px,5vw,96px);align-items:end;padding-top:var(--hdr);
  opacity:calc(1 - var(--c,0) * .75);transform:translateY(calc(var(--c,0) * -5vh)) scale(calc(1 - var(--c,0) * .05));transform-origin:50% 0}
.b-ink-head{display:flex;flex-direction:column;gap:22px}
.checks{list-style:none;display:flex;flex-direction:column;gap:14px;padding:0}
.checks li{position:relative;padding-left:34px;font-size:clamp(16px,1.3vw,20px);line-height:1.45;color:var(--on-ink-soft)}
.checks li::before{content:"";position:absolute;left:0;top:.45em;width:15px;height:8px;border-left:3px solid var(--lime);border-bottom:3px solid var(--lime);transform:rotate(-45deg)}
.b-sci{position:relative;z-index:2;background:var(--sci);color:var(--on-paper);--soft:var(--on-paper-soft);--mute:var(--on-paper-mute);
  border-radius:clamp(22px,2.6vw,40px) clamp(22px,2.6vw,40px) 0 0;box-shadow:0 -24px 70px rgba(0,0,0,.55);
  min-height:100svh;display:flex;align-items:center;padding-block:calc(var(--hdr) + 32px) clamp(64px,8vw,120px)}
.b-sci-in{display:flex;flex-direction:column;gap:26px}
.serif-h{font-family:var(--serif);font-weight:700;font-size:clamp(34px,4.6vw,72px);line-height:1.06;letter-spacing:-.01em}
.serif-lead{font-family:var(--serif);font-style:italic;font-size:clamp(18px,1.6vw,26px);line-height:1.45;color:var(--on-paper-soft);max-width:820px}
.toc{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 32px;margin-top:10px}
.toc li{display:grid;grid-template-columns:52px 1fr;column-gap:10px;padding:14px 0;border-top:1px solid var(--line-sci)}
.toc b{font-family:var(--mono);font-weight:400;font-size:13px;color:var(--on-paper-mute);grid-row:span 2;padding-top:5px}
.toc span{font-family:var(--serif);font-weight:700;font-size:clamp(18px,1.6vw,24px);line-height:1.2}
.toc em{font-style:normal;font-size:15px;color:var(--on-paper-soft)}

/* ---------- science track ---------- */
.mast{display:flex;align-items:center;gap:14px;padding-bottom:12px;border-bottom:2px solid var(--on-paper);margin-bottom:clamp(24px,3vw,40px)}
.mast i{width:16px;height:16px;background:var(--lime);border:2px solid var(--on-paper);flex:none}
.mast span{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase}
.mast em{margin-left:auto;font-style:normal;font-family:var(--mono);font-size:13px;color:var(--on-paper-mute);text-align:right}
.serif-h2{font-family:var(--serif);font-weight:700;font-size:clamp(30px,3.8vw,56px);line-height:1.1;margin-bottom:clamp(24px,3vw,44px)}
.serif{font-family:var(--serif);font-weight:700}
.phil-grid{display:grid;grid-template-columns:minmax(0,.9fr) repeat(3,minmax(0,1fr));gap:clamp(20px,2.6vw,40px);align-items:start}
.thinker{border-top:2px solid var(--on-paper);padding-top:16px;display:flex;flex-direction:column;gap:10px}
.thinker .who{font-family:var(--serif);font-size:clamp(24px,2.1vw,32px);font-weight:700;line-height:1.1}
.thinker .k{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-paper-mute);margin-top:4px}
.ink-t{color:var(--on-paper)!important}
.thesis-grid{grid-template-columns:minmax(0,1fr) minmax(220px,400px)}
.statement{font-family:var(--serif);font-weight:700;font-size:clamp(32px,4.4vw,66px);line-height:1.12;text-wrap:balance}
.layers-grid{display:grid;grid-template-columns:minmax(0,.55fr) minmax(0,1.45fr);gap:clamp(24px,4vw,56px);align-items:start}
.layers{display:flex;flex-direction:column}
.lrow{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr) minmax(0,1fr);gap:clamp(14px,2vw,28px);padding:18px 0;border-top:1px solid var(--line-sci)}
.lrow.hd{border-top:0;padding:0 0 8px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-paper-mute)}
.lrow > div{display:flex;flex-direction:column;gap:6px}
.lrow .ex{font-family:var(--serif);font-style:italic;font-size:clamp(18px,1.6vw,24px);line-height:1.3}
.lrow .do{border-left:4px solid var(--on-paper);padding-left:18px}
.labs-grid{grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);align-items:start}

/* ---------- clients ---------- */
.clients-sec{padding-top:0}
.banner{width:100%}
.banner .anim{aspect-ratio:1920/560;object-position:50% 36%;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 14%,#000 86%,transparent);mask-image:linear-gradient(to bottom,transparent,#000 14%,#000 86%,transparent)}
.clients-grid{grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);align-items:start;margin-top:clamp(20px,3vw,40px)}
.lead.dark{color:var(--on-paper)}
.clients{display:grid;grid-template-columns:repeat(3,1fr);gap:22px 32px}
.clients > div{border-top:2px solid var(--on-paper);padding-top:12px;display:flex;flex-direction:column;gap:4px}

/* ---------- start / timeline ---------- */
.start-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}
.tl{list-style:none;padding:0;position:relative}
.tl::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--line)}
.tl::after{content:"";position:absolute;left:0;top:0;width:2px;height:100%;background:var(--lime);transform:scaleY(0);transform-origin:top;transition:transform 1.4s cubic-bezier(.2,.7,.2,1) .2s}
.tl.in::after,.no-anim .tl::after{transform:scaleY(1)}
.tl li{padding:12px 0 14px 26px;display:flex;flex-direction:column;gap:4px;position:relative}
.tl li::before{content:"";position:absolute;left:-5px;top:19px;width:12px;height:12px;border-radius:50%;background:var(--ink);border:2px solid var(--lime)}
.tl b{font-family:var(--mono);font-weight:400;font-size:13px;color:var(--lime);letter-spacing:.06em}

/* ---------- contact ---------- */
.contact-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.logo-big{width:220px;height:auto}
.marquee{margin-top:clamp(48px,7vw,96px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;white-space:nowrap}
.marquee-track{display:inline-flex;gap:64px;padding:22px 0;animation:marq 38s linear infinite;will-change:transform}
.marquee-track span{font-size:clamp(28px,4vw,58px);font-weight:600;letter-spacing:-.01em;color:var(--on-ink)}
.marquee-track span:nth-child(odd){color:var(--lime)}
@keyframes marq{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- footer ---------- */
.ftr{background:var(--ink);color:var(--on-ink-soft);padding:40px var(--gut) calc(40px + env(safe-area-inset-bottom,0px));display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;border-top:1px solid var(--line-ink);font-size:14px}
.ftr img{width:90px;height:auto}
.ftr .muted{color:var(--on-ink-mute);margin-left:auto}

/* ---------- doors: three tracks on one pipeline ---------- */
.doors-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2vw,28px);margin-top:clamp(32px,4.5vw,56px)}
.door{position:relative;background:var(--card-ink);border:1px solid var(--line-ink);border-radius:16px;padding:clamp(22px,2.2vw,32px);display:flex;flex-direction:column;gap:14px;transition:border-color .3s ease,transform .3s ease}
.door:hover{border-color:rgba(188,250,0,.5);transform:translateY(-3px)}
.door-head{display:flex;align-items:center;gap:14px}
.door-ico{width:44px;height:44px;flex:none;fill:none;stroke:var(--lime);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.door-who{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;color:var(--on-ink)}
.door-who b{font-weight:500;font-size:clamp(16px,1.25vw,19px)}
.door-tasks-l{margin-top:6px}
.door-tasks{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;counter-reset:task}
.door-tasks li{display:grid;grid-template-columns:auto 1fr;column-gap:12px;row-gap:3px;padding:12px 0;border-top:1px solid var(--line-ink);counter-increment:task}
.door-tasks li::before{content:counter(task,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--lime);grid-row:span 2;padding-top:4px}
.door-tasks b{font-size:clamp(16px,1.2vw,18px);font-weight:600;color:var(--on-ink);line-height:1.3}
.door-tasks span{font-size:15px;line-height:1.45;color:var(--on-ink-soft)}
.door-cta{margin-top:auto;align-self:flex-start}
.doors-note{margin-top:clamp(20px,2.4vw,32px)}

/* ---------- Visual example: brief -> five variants -> pick ---------- */
.brief-norm{margin-top:6px}
.final.obs-card.vis-card{gap:clamp(14px,1.6vw,20px)}
.final.obs-card > .vars{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:clamp(10px,1.2vw,16px)}
.var{position:relative;margin:0;border:1px solid var(--line-ink);border-radius:10px;overflow:hidden;background:#10151A;display:flex;flex-direction:column;opacity:0;transform:translateY(10px);transition:opacity .5s ease calc(.15s + var(--i,0) * .1s),transform .5s cubic-bezier(.2,.7,.2,1) calc(.15s + var(--i,0) * .1s)}
.obs-card.on .var,.no-anim .var{opacity:1;transform:none}
.var svg{width:100%;aspect-ratio:4/3;display:block;fill:none;stroke:#8E98A4;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.var svg .lit{fill:rgba(188,250,0,.38);stroke:none}
.var svg .moon{fill:rgba(242,239,232,.14);stroke:none}
.var figcaption{padding:10px 12px 12px;display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line-ink)}
.var figcaption b{font-family:var(--mono);font-weight:400;font-size:12.5px;color:var(--on-ink)}
.var .marks{font-size:12.5px;line-height:1.4;color:var(--on-ink-soft)}
.var .marks .warn{color:var(--red)}
.var.sel{border-color:var(--lime);box-shadow:inset 0 0 0 1px var(--lime)}
.sel-badge{position:absolute;left:10px;top:10px;z-index:1;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;background:var(--lime);color:var(--on-lime);padding:4px 8px;border-radius:6px;line-height:1.2}
.final.obs-card > .passport{border:1px solid var(--line-ink);border-radius:10px;padding:clamp(14px,1.6vw,20px);display:flex;flex-direction:column;gap:12px}
.passport dl{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 18px;font-size:14px}
.passport dt{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--lime);padding-top:2px;white-space:nowrap}
.passport dd{margin:0;color:var(--on-ink);line-height:1.45}

/* ---------- Labs: core thesis under the three authors ---------- */
.thesis-block{margin-top:clamp(36px,5vw,72px);padding-top:clamp(24px,3vw,40px);border-top:2px solid var(--on-paper);display:flex;flex-direction:column;gap:16px;max-width:1100px}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav{gap:18px}
  .doors-grid{gap:14px}
  .door{padding:20px}
  .hdr-cta{display:none}
  .phil-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .phil-grid .plate{grid-column:1/-1;max-width:360px}
  .cols4{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:repeat(3,1fr)}
  .flow li:nth-child(3)::after{display:none}
}
@media (max-width:1000px){
  .final.obs-card > .vars{grid-template-columns:repeat(3,minmax(0,1fr))}
  .final.obs-card > .obs-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .pane-scenes{grid-column:1 / -1;grid-row:auto}
}
@media (max-width:900px){
  :root{--hdr:60px}
  .menu-btn{display:inline-flex;margin-left:auto}
  .nav{position:absolute;top:calc(var(--hdr) + env(safe-area-inset-top,0px));left:0;right:0;flex-direction:column;gap:0;background:rgba(12,16,19,.96);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);padding:8px var(--gut) 18px;margin:0;display:none}
  .nav.open{display:flex}
  .nav a{padding:12px 0;border-bottom:1px solid var(--line-ink);font-size:17px}
  .langs{order:3}
  .hero{min-height:auto;padding-bottom:96px}
  .hero-grid,.problem-grid,.cicd-grid,.idea-grid,.mod-grid,.tech-grid,.moat-grid,.thesis-grid,.labs-grid,.clients-grid,.start-grid,.contact-grid,.ex-grid,.layers-grid{grid-template-columns:minmax(0,1fr)}
  .media-bleed{margin-right:0}
  .cols3,.cols2,.clients,.doors-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr;row-gap:var(--fgap)}

  .flow li:not(:last-child)::after{top:calc(100% + 2px + (var(--fgap) - 12px) / 2);left:calc(50% - 12px);transform:rotate(90deg)}
  .flow li:nth-child(3)::after{display:block}
  .scheme-wrap{display:none}
  .steps-mobile{display:flex}
  .phil-grid{grid-template-columns:1fr}
  .lrow{grid-template-columns:1fr}
  .lrow.hd{display:none}
  .toc{grid-template-columns:1fr}
  .b-ink{position:relative;height:auto;padding:72px 0 104px}
  .b-ink-in{grid-template-columns:minmax(0,1fr);padding-top:0;opacity:1!important;transform:none!important}
  .b-sci{min-height:0;margin-top:-32px;padding-block:56px 72px}
  .obs{min-height:auto}
  .obs .sky{position:relative;inset:auto;height:auto;aspect-ratio:16/9;transform:none;margin-bottom:24px}
  .obs .sky-scrim{display:none}
  .obs{flex-direction:column;align-items:stretch;padding-top:0}
  .final{flex-direction:column;align-items:flex-start}
  .ftr .muted{margin-left:0}
}
@media (max-width:640px){
  .final.obs-card > .vars{grid-template-columns:repeat(2,minmax(0,1fr))}
  .passport dl{grid-template-columns:1fr;gap:2px 0}
  .passport dd{margin-bottom:8px}
  .final.obs-card > .kpis{grid-template-columns:repeat(2,minmax(0,1fr))}
  .final.obs-card > .obs-grid{grid-template-columns:minmax(0,1fr)}
  .scn{column-gap:1px;grid-template-rows:110px repeat(3,10px) auto}
  .scn .nm{font-size:12px;padding-right:8px}
}
@media (max-width:520px){
  .langs button{padding:4px 8px;font-size:11.5px}
  .brand img{width:86px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .marquee-track{animation:none}
  .scroll-cue i{animation:none}
  .mk,.mk.on{transition:none}
}