/* 01. Design tokens */
:root{--deep:#26323B;--violet:#72657E;--terra:#A86450;--azure:#55798D;--sage:#6F806B;--amber:#B08C55;--steel:#778188;--violet-wash:#E8E3EA;--terra-wash:#F0E1DC;--azure-wash:#E0E9ED;--sage-wash:#E5EAE2;--amber-wash:#F1E7D6;--paper:#F8F4EA;--cool:#EEF1F2;--graphite:#394147;--muted:#757D82;--white:#FFFFFF;--font-editorial:Georgia,Cambria,"Times New Roman",Times,serif;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;--step--1:clamp(.76rem,.7rem + .18vw,.88rem);--step-0:clamp(.98rem,.92rem + .18vw,1.08rem);--step-1:clamp(1.2rem,1.05rem + .6vw,1.55rem);--step-2:clamp(1.65rem,1.35rem + 1vw,2.4rem);--step-3:clamp(2.35rem,1.7rem + 2.3vw,4.25rem);--space:clamp(1rem,.65rem + 1.2vw,2rem);--section:clamp(4.5rem,3rem + 5vw,8.5rem);--container:1200px;--border:1px solid rgba(38,50,59,.19);--radius:3px;--shadow:0 14px 38px rgba(38,50,59,.08);--transition:220ms ease}
/* 02. Reset */
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:auto}body,h1,h2,h3,p,ul{margin:0}ul{padding:0}img{display:block;max-width:100%}button,input{font:inherit}a{color:inherit}button{cursor:pointer}
/* 03. Base */
body{background:var(--paper);color:var(--graphite);font-family:var(--font-sans);font-size:var(--step-0);line-height:1.68;overflow-x:hidden}.container{width:min(calc(100% - 2rem),var(--container));margin-inline:auto}.section{padding-block:var(--section)}.cool{background:var(--cool)}.paper{background:#f3eee3}.lead{font-size:var(--step-1);max-width:61ch}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:.65rem 1.1rem;border:1px solid var(--deep);text-decoration:none;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.04em}.primary{background:var(--deep);color:var(--white)}.secondary{background:transparent}.actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.8rem}.boundary{border-left:3px solid currentColor;padding-left:1rem;font-size:.9rem}.validity{--accent:var(--violet);--wash:var(--violet-wash)}.seismic{--accent:var(--terra);--wash:var(--terra-wash)}.statistics{--accent:var(--azure);--wash:var(--azure-wash)}
/* 04. Accessibility */
.skip-link{position:fixed;z-index:999;top:.5rem;left:.5rem;padding:.7rem 1rem;background:var(--white);color:var(--deep);transform:translateY(-160%)}.skip-link:focus{transform:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}:focus-visible{outline:3px solid var(--amber);outline-offset:4px}
/* 05. Typography */
h1,h2,h3{font-family:var(--font-editorial);color:var(--deep);font-weight:500;line-height:1.08}h1{font-size:var(--step-3);letter-spacing:-.035em}h1 em{color:var(--violet);font-style:italic}h2{font-size:var(--step-2);max-width:25ch}h3{font-size:var(--step-1)}.eyebrow,.stack-kicker{font-family:var(--font-mono);font-size:var(--step--1);font-weight:700;letter-spacing:.1em}.section-heading{position:relative;max-width:820px;margin-bottom:3.2rem}.section-heading .eyebrow{margin-bottom:.75rem}.section-heading>p:last-child{margin-top:1rem}
/* 06. Layout */
.hero-grid,.final-grid,.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.5rem,6vw,7rem);align-items:center}.domain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.profiles{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}.notes{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
/* 07. Header */
.site-header{position:sticky;z-index:100;top:0;background:rgba(248,244,234,.97);border-bottom:var(--border)}.header-inner{display:flex;min-height:74px;align-items:center;gap:1.5rem}.brand{flex:0 0 255px}.brand img{width:255px}.site-header nav{display:flex;align-items:center;gap:1rem;margin-left:auto}.site-header nav a{font-size:.76rem;text-decoration:none;white-space:nowrap}.site-header nav a:not(.nav-cta):hover{color:var(--violet)}.nav-cta{padding:.55rem .7rem;background:var(--deep);color:white}.menu-toggle{display:none;margin-left:auto;border:0;background:none;padding:.5rem}.menu-toggle span{display:block;width:24px;height:2px;margin:5px;background:var(--deep)}
/* 08. Hero */
.hero{padding-block:clamp(4rem,8vw,8rem);background:linear-gradient(105deg,var(--paper) 0 66%,var(--cool) 66%)}.hero-copy .eyebrow{margin-bottom:1.3rem}.hero-copy .lead{margin-top:1.5rem}.micro{margin-top:1.5rem;font-family:var(--font-mono);font-size:.76rem}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--sage)}.hero-stacks{display:grid;gap:1.2rem}.hero-boundary{grid-column:1/-1;margin-top:1rem;padding-top:1rem;border-top:var(--border);font-family:var(--font-mono);font-size:.78rem}
/* 09. Assumption Stacks */
.stack{position:relative;padding:1rem 0 1rem 2rem;border-left:1px solid var(--deep)}.stack::before{content:"";position:absolute;left:-5px;top:37%;width:9px;height:9px;border:2px solid var(--deep);border-radius:50%;background:var(--amber)}.stack::after{content:"";position:absolute;left:6px;bottom:17px;width:8px;height:8px;background:var(--accent)}.stack-kicker{color:var(--accent);margin-bottom:.55rem}.slabs{display:grid;gap:7px}.slabs span{display:flex;justify-content:space-between;gap:1rem;padding:.42rem .7rem;background:var(--wash);border-left:3px solid var(--accent);font-family:var(--font-mono);font-size:.7rem}.slabs span:nth-child(1){width:78%;margin-left:10%}.slabs span:nth-child(2){width:92%}.slabs span:nth-child(3){width:83%;margin-left:14%}.slabs span:nth-child(4){width:96%;margin-left:3%}.slabs small{font-family:var(--font-sans);color:var(--muted)}
/* 10. Check Notches */
.notch{display:block;position:absolute;left:-1.2rem;top:.1rem;width:10px;height:10px;border-left:2px solid var(--amber);border-top:2px solid var(--amber)}.notch::before{content:"";position:absolute;left:4px;top:4px;width:14px;border-top:1px solid var(--deep)}.notch::after{content:"";position:absolute;left:14px;top:1px;width:6px;height:6px;border-radius:50%;background:var(--amber)}
/* 11. Concept Band */
.concept-band{padding-block:3.3rem;background:var(--deep);color:var(--white)}.concept-band .eyebrow{color:#d9c7a7}.band-lead{max-width:850px;margin-top:1rem;font-family:var(--font-editorial);font-size:var(--step-1)}.concept-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:2rem;border-top:1px solid #59636b}.concept-grid p{padding:1.25rem 1rem;border-right:1px solid #59636b;font-family:var(--font-mono);font-size:.78rem}.concept-grid p:last-child{border:0}
/* 12. Evidence Domains */
.domain{min-height:380px;padding:1.3rem;border-top:5px solid var(--accent);background:var(--wash);display:flex;flex-direction:column}.domain>b{font-family:var(--font-mono);color:var(--accent)}.domain h3{margin:2.5rem 0 1rem}.tags{list-style:none;margin-top:auto;padding-top:1.5rem;display:flex;gap:.4rem;flex-wrap:wrap}.tags li{border:1px solid var(--accent);padding:.25rem .4rem;font-family:var(--font-mono);font-size:.68rem}
/* 13. Model Checks */
.checks{display:grid;gap:2rem}.check{position:relative;width:88%;padding:2rem 2rem 2rem 3rem;background:var(--white);border-left:6px solid var(--accent);box-shadow:var(--shadow)}.check:nth-child(2){margin-left:7%}.check:nth-child(3){margin-left:12%}.check h3{margin:.6rem 0 1.2rem}.check p{margin-top:.75rem}.check .boundary{color:var(--accent)}
/* 14. Inference Protocol */
.protocol{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.protocol article{position:relative;min-height:220px;padding:1.3rem;border:var(--border);border-top:4px solid var(--sage);background:var(--sage-wash)}.protocol article:nth-child(even){transform:translateY(1.25rem)}.protocol b{font-family:var(--font-mono);color:var(--sage)}.protocol h3{margin:2rem 0 .75rem}
/* 15. Robustness Checklist */
.checklist{margin-top:6rem;padding:clamp(1.5rem,4vw,3.5rem);background:var(--deep);color:white}.checklist h2{color:white;margin:.7rem 0 2rem}.checklist ul{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem 2rem;list-style:none}.checklist li{padding:.5rem 0;border-bottom:1px solid #59636b}.checklist li::before{content:"○";color:#d9c7a7;margin-right:.65rem}
/* 16. Academic References */
.profile{position:relative;padding:1.4rem;background:var(--white);border-top:4px solid var(--accent);box-shadow:0 5px 18px rgba(38,50,59,.05)}.profile::after{content:"";display:block;width:70%;height:4px;margin:1.5rem auto 0;background:var(--wash);box-shadow:10px 8px 0 var(--accent),-5px 16px 0 var(--wash)}.profile.offset{transform:translateY(1rem)}.avatar{display:grid;place-items:center;width:56px;height:56px;margin-bottom:1.2rem;background:var(--accent);color:white;font-family:var(--font-mono);font-size:.8rem}.profile:nth-child(2n) .avatar{margin-left:auto}.profile .eyebrow{color:var(--accent)}.profile h3{margin:.5rem 0 1rem}.profile p{margin-top:.65rem;font-size:.89rem}.themes{color:var(--accent);font-family:var(--font-mono);font-size:.72rem!important}.contact{display:grid;gap:.5rem;margin-top:1rem}.contact a{font-size:.78rem;overflow-wrap:anywhere}.copy-email{justify-self:start;border:1px solid var(--accent);background:var(--wash);padding:.4rem .7rem;color:var(--deep);font-family:var(--font-mono);font-size:.72rem}
/* 17. Independence Note */
.independence{margin-top:5rem;padding:2rem;border:1px solid var(--amber);background:var(--amber-wash);columns:2;column-gap:3rem}.independence h2,.independence .eyebrow{column-span:all;margin-bottom:1rem}.independence p{margin-bottom:1rem}
/* 18. Method Notes */
.method-note details{height:100%;border:var(--border);background:var(--white)}.method-note summary{height:100%;padding:1.3rem;cursor:pointer;list-style:none}.method-note summary::after{content:"＋";float:right;color:var(--amber)}.method-note details[open] summary::after{content:"−"}.method-note summary span,.method-note summary strong,.method-note summary small{display:block}.method-note summary span,.tags-text{font-family:var(--font-mono);font-size:.72rem;color:var(--violet)}.method-note summary strong{margin:.8rem 0;font-family:var(--font-editorial);font-size:1.2rem;color:var(--deep)}.method-note summary small{font-size:.86rem}.method-note details>p{padding:0 1.3rem 1rem}.method-note .tags-text{padding-bottom:1.3rem}
/* 19. Search */
.search-box{display:grid;grid-template-columns:1fr auto;gap:.35rem 1rem;margin-bottom:2rem;padding:1rem;border-top:2px solid var(--deep);background:var(--cool)}.search-box label{grid-column:1/-1;font-family:var(--font-mono);font-size:.76rem}.search-box>div{display:flex}.search-box input{width:min(650px,100%);min-height:48px;border:1px solid var(--steel);padding:.65rem;background:white}.search-box button{border:0;background:var(--deep);color:white;padding:.6rem .9rem}.search-box p{align-self:center;font-family:var(--font-mono)}.no-results{padding:2rem;text-align:center;border:var(--border)}
/* 20. About */
.about{background:var(--sage-wash)}.about-grid p{margin-top:1rem}.principles{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:4rem}.principles article{padding:1.3rem;border-top:3px solid var(--sage);background:rgba(255,255,255,.45)}.principles b{font-family:var(--font-mono);color:var(--sage)}.principles h3{margin:1.5rem 0 .8rem}
/* 21. Final CTA */
.final-cta{padding-block:var(--section);background:var(--amber-wash)}.final-grid p{margin-top:1rem}.final-stack{display:grid;gap:.7rem;position:relative}.final-stack span{display:flex;justify-content:space-between;padding:1rem 1.2rem;background:var(--white);border-left:5px solid var(--amber);font-family:var(--font-mono)}.final-stack span:nth-of-type(1){width:80%;margin-left:8%}.final-stack span:nth-of-type(2){width:92%}.final-stack span:nth-of-type(3){width:84%;margin-left:13%}.final-stack span:nth-of-type(4){width:96%;margin-left:2%}.final-stack small{color:var(--muted)}.final-stack strong{text-align:center;color:var(--deep);letter-spacing:.25em}.final-stack i{width:10px;height:10px;border-left:2px solid var(--sage);border-bottom:2px solid var(--sage);margin-left:45%}
/* 22. Footer */
footer{padding:4rem 0 1.5rem;background:var(--deep);color:#e6e7e8}footer h2{color:white;font-size:1.4rem;margin-top:1rem}.footer-grid{display:grid;grid-template-columns:1fr 1fr auto;gap:2rem}.footer-grid img{width:58px}.footer-grid p{font-size:.85rem}.footer-grid nav{display:grid;grid-template-columns:1fr 1fr;gap:.35rem}.footer-grid a{font-size:.84rem}.back-top{align-self:start}.copyright{margin-top:3rem;padding-top:1rem;border-top:1px solid #59636b;font-size:.75rem}
/* 23. Reveal */
.js-enabled .reveal{opacity:0;transform:translateY(18px);transition:opacity 600ms ease,transform 600ms ease}.js-enabled .reveal.is-visible{opacity:1;transform:none}
/* 24. Responsive */
@media(max-width:1120px){.site-header nav{position:absolute;display:none;top:74px;left:0;right:0;margin:0;padding:1rem;background:var(--paper);border-bottom:var(--border);flex-direction:column;align-items:stretch}.site-header nav.is-open{display:flex}.site-header nav a{padding:.5rem}.menu-toggle{display:block}.domain-grid,.principles{grid-template-columns:repeat(2,1fr)}.profiles{grid-template-columns:repeat(2,1fr)}.protocol{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.hero-grid,.final-grid,.about-grid{grid-template-columns:1fr}.hero{background:var(--paper)}.domain-grid,.profiles,.notes,.principles,.protocol{grid-template-columns:1fr}.concept-grid{grid-template-columns:1fr}.concept-grid p{border-right:0;border-bottom:1px solid #59636b}.protocol article:nth-child(even),.profile.offset{transform:none}.check,.check:nth-child(2),.check:nth-child(3){width:100%;margin-left:0;padding:1.25rem}.checklist ul{grid-template-columns:1fr}.independence{columns:1}.footer-grid{grid-template-columns:1fr}.search-box{grid-template-columns:1fr}.search-box p{grid-row:3}.slabs small{display:none}.final-stack small{font-size:.6rem}}
@media(max-width:420px){.container{width:min(calc(100% - 1.2rem),var(--container))}.brand{flex-basis:205px}.brand img{width:205px}.actions{flex-direction:column}.button{width:100%}.profile,.domain{padding:1rem}.footer-grid nav{grid-template-columns:1fr}.final-stack span{font-size:.7rem;padding:.8rem}.independence{padding:1.2rem}}
/* 25. Reduced Motion */
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}.js-enabled .reveal{opacity:1;transform:none}}