@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800&family=Manrope:wght@400;500;600;700&display=swap');
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*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--ground)}body{overflow:hidden}button,a,textarea{font:inherit}button,a{touch-action:manipulation}button{color:inherit}.skip{position:fixed;top:-100px;left:1rem;z-index:100;background:var(--yellow);padding:.8rem 1rem;color:var(--ink)}.skip:focus{top:1rem}::selection{background:var(--yellow);color:var(--ink)}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
.topbar{height:72px;position:fixed;inset:0 0 auto;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:0 clamp(18px,4vw,64px);border-bottom:1px solid var(--line);background:rgba(238,237,231,.94)}.brand{display:flex;align-items:baseline;gap:.7rem;text-decoration:none;color:var(--ink)}.brand>span{font-family:var(--display);font-size:2.15rem;font-weight:800;letter-spacing:-.03em}.brand small{font-size:.68rem;font-weight:700;letter-spacing:.15em}.role-button{border:0;background:transparent;font-weight:700;cursor:pointer}.role-button b{color:var(--red);font-size:1.3rem;margin-left:.4rem}
.deck{height:100dvh;display:flex;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scrollbar-width:none}.deck::-webkit-scrollbar{display:none}.slide{position:relative;min-width:100vw;height:100dvh;padding:clamp(100px,12vh,150px) clamp(24px,6vw,96px) clamp(110px,12vh,150px);scroll-snap-align:start;overflow:hidden}.slide h1,.slide h2{font-family:var(--display);font-weight:700;letter-spacing:-.035em;line-height:.93;margin:0;text-wrap:balance}.slide h1{font-size:clamp(4rem,8vw,8.5rem);max-width:10ch}.slide h2{font-size:clamp(3.1rem,6vw,6.7rem);max-width:11ch}.slide p{font-size:clamp(1rem,1.35vw,1.28rem);line-height:1.6;max-width:62ch}.primary{display:inline-flex;align-items:center;justify-content:space-between;gap:2rem;border:0;border-radius:12px;background:var(--red);color:white;padding:1rem 1.15rem 1rem 1.4rem;font-weight:700;text-decoration:none;cursor:pointer;box-shadow:0 12px 24px rgba(226,66,46,.24)}.primary span{font-size:1.4rem}.primary:hover{background:#c93524}
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.equation{background:var(--ink);color:var(--ground);display:grid;grid-template-rows:auto 1fr auto}.equation-line{display:flex;align-items:center;gap:clamp(.5rem,2vw,2rem);white-space:nowrap;font-family:var(--display);font-size:clamp(2rem,5.2vw,6rem);font-weight:700}.equation-line b{color:var(--red)}.model-copy{align-self:center;display:flex;justify-content:space-between;gap:3rem;align-items:end}.model-copy p{color:#c8c9c3;max-width:44ch}.layers{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #494a46}.layers div{padding:1.1rem;border-right:1px solid #494a46}.layers b,.layers span{display:block}.layers b{font-family:var(--display);font-size:1.6rem}.layers span{font-size:.8rem;color:#b4b5af}
.trainer{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(350px,1.15fr) minmax(320px,1fr);grid-template-rows:auto auto 1fr;gap:1.5rem 3vw}.trainer-copy{grid-column:1/3}.trainer-copy h2{max-width:14ch}.role-strip{grid-column:1/-1;display:flex;gap:.6rem;overflow-x:auto;padding:.2rem}.role-chip{border:1px solid var(--line);border-radius:999px;background:transparent;padding:.65rem 1rem;white-space:nowrap;cursor:pointer}.role-chip[aria-checked="true"]{background:var(--ink);color:white;border-color:var(--ink)}.situation{grid-column:1/3;display:grid;grid-template-columns:1fr auto;align-content:start;gap:.7rem}.situation label{grid-column:1/-1;font-family:var(--display);font-size:1.25rem;font-weight:700}.situation textarea{grid-column:1/-1;resize:none;min-height:150px;border:0;border-bottom:3px solid var(--ink);border-radius:0;background:transparent;padding:.6rem 0;font-family:var(--display);font-size:clamp(1.8rem,3.4vw,3.8rem);font-weight:600;line-height:1.06;color:var(--ink)}.situation textarea::placeholder{color:#777872}.examples{display:flex;gap:.4rem;flex-wrap:wrap}.examples button{border:0;background:#dcdcd5;padding:.45rem .7rem;border-radius:7px;cursor:pointer;font-size:.78rem}.analyze{align-self:end}.result{grid-column:3;grid-row:3;padding:1.3rem;background:var(--blue);color:white;border-radius:14px;box-shadow:var(--shadow);min-height:280px}.result.loading{background:var(--ink)}.result.error{background:var(--red)}.result h3{font-family:var(--display);font-size:2.3rem;line-height:1;margin:.3rem 0 1rem}.result .meta{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid rgba(255,255,255,.35);padding-top:.8rem;font-size:.8rem}.result .domain{display:inline-block;background:var(--yellow);color:var(--ink);padding:.35rem .5rem;border-radius:4px;font-weight:700;font-size:.74rem}.result small{display:block;margin-top:1rem;line-height:1.45;color:#e1e6fa}
.relations{display:grid;grid-template-columns:.7fr 1.3fr;align-items:center;gap:6vw}.relation-head p{max-width:38ch}.orbit{position:relative;aspect-ratio:1;max-height:68vh}.orbit:before,.orbit:after{content:"";position:absolute;inset:14%;border:2px solid var(--red);border-radius:50%}.orbit:after{inset:26%;border-color:var(--line)}.orbit button{position:absolute;left:var(--x);top:var(--y);transform:translate(-50%,-50%);z-index:2;width:125px;height:72px;border:0;border-radius:12px;background:white;box-shadow:0 12px 25px rgba(23,24,22,.13);font-family:var(--display);font-size:1.2rem;font-weight:700;cursor:pointer}.orbit button span{display:block;font:500 .75rem var(--body);color:var(--muted)}.orbit-center{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;width:185px;height:185px;border-radius:50%;display:grid;place-content:center;text-align:center;background:var(--ink);color:white;padding:1.2rem}.orbit-center b{font:800 3rem var(--display)}.orbit-center span{font-size:.72rem;line-height:1.4}
.controller{background:var(--yellow);display:grid;grid-template-columns:.8fr 1.2fr;grid-template-rows:1fr auto;gap:4vw}.controller-copy{align-self:center}.domain-rail{display:grid;align-content:center}.domain-rail button{display:flex;justify-content:space-between;align-items:center;text-align:left;border:0;border-bottom:1px solid rgba(23,24,22,.4);background:transparent;padding:1rem .2rem;cursor:default}.domain-rail b{font:700 clamp(1.3rem,2.2vw,2.3rem) var(--display)}.domain-rail span{font-size:.75rem;max-width:28ch}.boundary{grid-column:1/-1;display:grid;grid-template-columns:auto 1fr auto 1fr;gap:1rem;align-items:center;padding-top:1rem;border-top:2px solid var(--ink)}.boundary span{font-size:.75rem;font-weight:800;letter-spacing:.08em}.boundary strong{font-family:var(--display);font-size:1.2rem}
.editions{display:grid;grid-template-columns:.75fr 1.25fr;gap:5vw;align-items:center}.edition-links{display:grid;border-top:2px solid var(--ink)}.edition-links a{display:grid;grid-template-columns:.7fr 1fr auto;gap:1rem;align-items:center;padding:1.3rem .4rem;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.edition-links a:hover{background:var(--yellow)}.edition-links strong{font:700 2rem var(--display)}.edition-links span,.edition-links b{font-size:.78rem}.final-link{position:absolute;left:clamp(24px,6vw,96px);bottom:120px}
.controls{position:fixed;z-index:30;left:50%;bottom:22px;transform:translateX(-50%);height:54px;display:flex;align-items:center;background:var(--ink);color:white;border-radius:14px;box-shadow:var(--shadow);overflow:hidden}.controls>button{width:58px;height:54px;border:0;background:transparent;color:white;cursor:pointer;font-size:1.3rem}.controls>button:hover{background:#31322f}.progress{display:flex;height:100%;align-items:center}.progress button{width:36px;height:100%;border:0;background:transparent;cursor:pointer;position:relative}.progress button:after{content:"";position:absolute;left:50%;top:50%;width:7px;height:7px;border-radius:50%;background:#777872;transform:translate(-50%,-50%)}.progress button[aria-selected="true"]:after{width:24px;border-radius:4px;background:var(--red)}
dialog{border:0;border-radius:16px;padding:0;width:min(740px,calc(100% - 30px));background:var(--ground);color:var(--ink);box-shadow:0 30px 80px rgba(0,0,0,.35)}dialog::backdrop{background:rgba(23,24,22,.7)}dialog form{padding:clamp(1.5rem,5vw,4rem)}dialog h2{font:700 clamp(2.5rem,5vw,5rem)/.95 var(--display);max-width:10ch;margin:0 0 2rem}.close{position:absolute;right:1rem;top:1rem;border:0;background:transparent;font-size:2rem;cursor:pointer}.dialog-roles{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem}.dialog-roles button{border:1px solid var(--line);background:white;text-align:left;padding:1rem;border-radius:12px;cursor:pointer}.dialog-roles b,.dialog-roles span{display:block}.dialog-roles b{font:700 1.5rem var(--display)}.dialog-roles span{font-size:.75rem;color:var(--muted)}
@media(max-width:900px){.intro,.relations,.controller,.editions{grid-template-columns:1fr}.intro{align-content:center}.statement h1{font-size:clamp(3.7rem,13vw,6.4rem)}.causal{min-height:36vh}.node{width:44%}.trainer{grid-template-columns:1fr;grid-template-rows:auto}.trainer-copy,.role-strip,.situation,.result{grid-column:1;grid-row:auto}.trainer-copy p{display:none}.result{min-height:220px}.orbit{width:min(100%,520px);margin:auto}.controller{overflow-y:auto}.boundary{grid-template-columns:1fr 1fr}.domain-rail{align-content:start}.editions{align-content:center}.final-link{position:static;width:max-content}.edition-links a{grid-template-columns:.6fr 1fr}.edition-links b{display:none}}
@media(max-width:600px){.topbar{height:62px}.brand small{display:none}.slide{padding:84px 20px 100px}.slide h2{font-size:3.15rem}.intro{display:block;overflow-y:auto}.statement h1{font-size:4.2rem}.statement p{font-size:.94rem}.causal{margin-top:2rem;min-height:390px}.hint{display:none}.equation-line{overflow:hidden;font-size:2.4rem}.model-copy{display:block}.model-copy h2{font-size:3.3rem}.layers{grid-template-columns:1fr 1fr}.layers div:nth-child(2){border-right:0}.trainer{overflow-y:auto;display:block}.trainer>*{margin-bottom:1rem}.situation{display:flex;flex-direction:column}.situation textarea{font-size:2rem;min-height:120px}.analyze{width:100%}.relation-head h2{font-size:3.2rem}.orbit{margin-top:1rem}.orbit button{width:94px;height:58px;font-size:1rem}.orbit-center{width:135px;height:135px}.orbit-center b{font-size:2.3rem}.controller{display:block;overflow-y:auto}.controller h2{font-size:3.3rem}.controller-copy p{font-size:.88rem}.domain-rail button{padding:.7rem 0}.domain-rail span{max-width:20ch}.boundary{display:none}.editions{display:block;overflow-y:auto}.edition-links{margin-top:1.5rem}.edition-links a{grid-template-columns:1fr}.edition-links strong{font-size:1.7rem}.controls{bottom:14px}.dialog-roles{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}.tension path{animation:none}.deck{scroll-behavior:auto}}