/* 01. Design tokens */
:root {
  --aubergine:#2D2534; --storm:#49657C; --olive:#78865E; --oxide:#B66A4A; --solar:#D8B64C;
  --parchment:#FAF5E9; --cloud:#E4EBEF; --olive-wash:#E9ECE1; --clay:#F1E5DF; --graphite:#37333B; --muted:#7B7680; --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;
  --fs-sm:clamp(.76rem,.72rem + .15vw,.84rem); --fs-body:clamp(.98rem,.94rem + .2vw,1.08rem); --fs-h3:clamp(1.28rem,1.1rem + .6vw,1.7rem); --fs-h2:clamp(2rem,1.5rem + 2vw,3.4rem); --fs-h1:clamp(2.8rem,1.8rem + 4.4vw,6.2rem);
  --s1:.5rem; --s2:.8rem; --s3:1.25rem; --s4:2rem; --s5:3.5rem; --s6:6rem; --container:1200px;
  --border:1px solid rgba(45,37,52,.2); --radius:12px; --shadow:0 16px 45px rgba(45,37,52,.08); --transition:180ms ease;
}

/* 02. Reset */
*,*::before,*::after{box-sizing:border-box}html{scroll-padding-top:88px}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(--parchment);color:var(--graphite);font-family:var(--font-sans);font-size:var(--fs-body);line-height:1.65;overflow-x:hidden}::selection{background:var(--solar);color:var(--aubergine)}

/* 04. Accessibility */
.skip-link{position:fixed;z-index:1000;left:1rem;top:1rem;padding:.7rem 1rem;background:var(--solar);color:var(--aubergine);transform:translateY(-150%)}.skip-link:focus{transform:none}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--solar);outline-offset:4px}#main-content:focus{outline:none}[hidden]{display:none!important}

/* 05. Typography */
h1,h2,h3{font-family:var(--font-editorial);font-weight:400;line-height:1.05;color:var(--aubergine)}h1{font-size:var(--fs-h1);letter-spacing:-.045em;max-width:900px}h2{font-size:var(--fs-h2);letter-spacing:-.03em;max-width:900px}h3{font-size:var(--fs-h3)}h1 em{color:var(--oxide);font-weight:400}.eyebrow,.micro,.track-meta,.track small,.condition>span,.crossing small,.crossing>b,.orcid,.profile-top small,.status,.search-box label{font-family:var(--font-mono);font-size:var(--fs-sm);letter-spacing:.09em;text-transform:uppercase}.eyebrow{color:var(--oxide);font-weight:700;margin-bottom:var(--s3)}.lede{font-size:clamp(1.12rem,1rem + .5vw,1.4rem);max-width:760px}.section-head>p:last-child{max-width:720px;color:var(--muted);margin-top:var(--s3)}

/* 06. Global layout */
.container{width:min(calc(100% - 2.5rem),var(--container));margin-inline:auto}.section{padding:var(--s6) 0}.section-head{margin-bottom:var(--s5)}.actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:var(--s4)}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:.75rem 1.2rem;text-decoration:none;border:1px solid var(--aubergine);font-weight:700}.button.primary{background:var(--aubergine);color:var(--white)}.button.secondary{background:transparent}.button:hover{transform:translateY(-2px)}

/* 07. Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(250,245,233,.96);border-bottom:var(--border)}.header-inner{height:78px;display:flex;align-items:center;justify-content:space-between;gap:1.5rem}.brand{width:260px}.site-header nav{display:flex;align-items:center;gap:clamp(.7rem,1.5vw,1.4rem)}.site-header nav a{font-size:.82rem;text-decoration:none;white-space:nowrap}.site-header nav a:hover{text-decoration:underline;text-underline-offset:5px}.nav-cta{border:1px solid var(--aubergine);padding:.52rem .75rem;font-weight:700}.menu-toggle{display:none;background:none;border:0;padding:.5rem}.menu-toggle span{display:block;width:25px;height:2px;background:var(--aubergine);margin:5px}

/* 08. Hero */
.hero{padding:clamp(4rem,8vw,8rem) 0 var(--s5);background:radial-gradient(circle at 82% 14%,rgba(216,182,76,.18),transparent 20%),var(--parchment)}.hero-copy{position:relative}.hero-copy::after{content:"LIMIT / 01";position:absolute;right:2%;top:5%;font:var(--fs-sm) var(--font-mono);color:var(--muted);writing-mode:vertical-rl}.hero-copy .lede{margin-top:var(--s4)}.hero-copy .micro{margin-top:var(--s4);color:var(--muted)}

/* 09. Threshold instrument */
.instrument{margin-top:var(--s6);background:var(--white);border:var(--border);box-shadow:var(--shadow);padding:clamp(1.2rem,3vw,2.5rem)}.instrument-head{display:flex;justify-content:space-between;align-items:center;border-bottom:var(--border);padding-bottom:var(--s3);font:700 var(--fs-sm) var(--font-mono);letter-spacing:.08em}.instrument-head img{width:44px}.instrument-foot{display:grid;grid-template-columns:1fr 1.4fr;gap:var(--s4);padding-top:var(--s4);border-top:var(--border);font-size:.85rem}.instrument-foot b{font-family:var(--font-mono);color:var(--storm)}

/* 10. Threshold tracks */
.track{display:grid;grid-template-columns:155px 1fr;gap:1rem 2rem;padding:var(--s4) 0}.track+.track{border-top:var(--border)}.track-meta{display:flex;flex-direction:column}.track-meta span{color:var(--muted);font-size:.7rem}.track p,.track small{grid-column:2}.track p{max-width:720px}.track small{color:var(--muted)}.track-visual{height:62px;position:relative;border-bottom:2px solid var(--storm)}.track-visual span{position:absolute;font:700 .67rem var(--font-mono);letter-spacing:.04em;bottom:8px}.track-visual .before{left:0}.track-visual .after{right:0}.track-visual .limit{left:61%;transform:translateX(-50%);bottom:35px;color:var(--aubergine)}.track-visual .point{position:absolute;width:13px;height:13px;border-radius:50%;background:var(--olive);left:27%;bottom:-7px}.track-visual .boundary{position:absolute;height:50px;width:3px;background:var(--solar);left:61%;bottom:-2px}.track-visual .boundary::after{content:"";position:absolute;width:13px;height:13px;border-radius:50%;background:var(--oxide);left:28px;bottom:-5px}.uncertainty{position:absolute;left:56%;bottom:-8px;width:11%;height:17px;background:rgba(216,182,76,.25)}.track-rule .boundary{left:53%}.track-rule .limit{left:53%}.track-particle .boundary{left:68%}.track-particle .limit{left:68%}

/* 11. Critical band */
.critical-band{background:var(--aubergine);color:var(--white);padding:var(--s5) 0}.critical-band .container{display:grid;grid-template-columns:1.3fr 1fr;gap:var(--s5)}.critical-band h2{color:var(--white);font-size:clamp(1.8rem,2.7vw,3rem)}.critical-band ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:var(--s3)}.critical-band li{border-top:1px solid rgba(255,255,255,.3);padding-top:.7rem}

/* 12. Conditions */
.conditions-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:var(--border);border-bottom:var(--border)}.condition{padding:var(--s4);min-height:430px}.condition+.condition{border-left:var(--border)}.condition h3{margin:var(--s5) 0 var(--s3)}.condition p{color:var(--muted)}.condition ul{list-style:none;margin-top:var(--s4);font-size:.9rem}.condition li{border-top:1px solid rgba(45,37,52,.15);padding:.45rem 0}.condition.evidence{background:var(--olive-wash)}.condition.rules{background:var(--cloud)}.condition.atmosphere{background:var(--clay)}

/* 13. Crossings */
.crossings{background:var(--white)}.crossing{display:grid;grid-template-columns:1fr 130px 1fr;align-items:stretch;border-top:var(--border);min-height:260px}.crossing:last-child{border-bottom:var(--border)}.crossing>div{padding:var(--s4)}.crossing>div:last-child{background:rgba(73,101,124,.06)}.crossing h3{margin:.8rem 0}.crossing p{color:var(--muted)}.crossing>b{display:flex;align-items:center;justify-content:center;text-align:center;border-inline:1px solid var(--solar);color:var(--aubergine);writing-mode:vertical-rl;background:rgba(216,182,76,.1)}

/* 14. Threshold method */
.method{background:var(--cloud)}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);counter-reset:stage;gap:1px;background:rgba(45,37,52,.18);border:var(--border)}.method-grid article{background:var(--parchment);padding:var(--s4);min-height:210px;position:relative}.method-grid article:nth-child(4){grid-column:3}.method-grid article:nth-child(5){grid-column:2;grid-row:2}.method-grid article:nth-child(6){grid-column:1;grid-row:2}.method-grid b{font:700 1rem var(--font-mono);color:var(--oxide)}.method-grid h3{margin:var(--s4) 0 var(--s2)}.method-grid article:not(:nth-child(3))::after{content:"→";position:absolute;right:-12px;top:45%;z-index:2;color:var(--oxide);font-size:1.5rem}.method-grid article:nth-child(4)::after,.method-grid article:nth-child(5)::after{content:"←";left:-12px;right:auto}

/* 15. Threshold checklist */
.checklist{display:grid;grid-template-columns:.8fr 1.5fr;gap:var(--s5);background:var(--aubergine);color:var(--white);padding:var(--s5);margin-top:var(--s5)}.checklist h2{color:var(--white)}.checklist ul{list-style:none;columns:2;column-gap:2rem}.checklist li{break-inside:avoid;border-top:1px solid rgba(255,255,255,.25);padding:.65rem 0}

/* 16. Researchers */
.references{background:var(--parchment)}.contact-note{padding:var(--s3);border-left:4px solid var(--solar);background:var(--white)}.profiles{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);align-items:start}.profile{background:var(--white);border-top:5px solid var(--olive);padding:var(--s4);box-shadow:var(--shadow)}.profile.rules{border-color:var(--storm)}.profile.atmosphere{border-color:var(--oxide)}.profile.offset{margin-top:var(--s4)}.profile-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--s4)}.avatar{display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:var(--aubergine);color:var(--white);font:700 1rem var(--font-mono)}.profile h3{margin-bottom:var(--s3)}.profile>p{font-size:.9rem;margin-top:var(--s3)}.themes{color:var(--muted)}.orcid{color:var(--storm)}.contact{margin-top:var(--s4);padding-top:var(--s3);border-top:var(--border);display:flex;flex-direction:column;align-items:flex-start;gap:.5rem}.contact a{font-size:.82rem;overflow-wrap:anywhere}.copy-email,#clear-search{border:1px solid var(--aubergine);background:transparent;padding:.5rem .7rem}.status{display:inline-block;margin-top:var(--s4);padding:.5rem;background:var(--olive-wash)}

/* 17. Independence note */
.independence{background:var(--aubergine);color:var(--white);padding:var(--s5) 0}.independence h2{color:var(--white)}.independence .container>div{display:grid;grid-template-columns:1fr 1.4fr;gap:var(--s5)}.independence .container>div p+p{margin-top:var(--s3)}

/* 18. Research cards */
.library{background:var(--white)}.card-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s3)}.research-card{border:var(--border);background:var(--parchment)}.research-card details[open]{box-shadow:var(--shadow)}.research-card summary{list-style:none;padding:var(--s4);cursor:pointer;min-height:260px;position:relative}.research-card summary::-webkit-details-marker{display:none}.research-card summary small,.research-card details>div small{font:var(--fs-sm) var(--font-mono);color:var(--oxide);text-transform:uppercase}.research-card h3{margin:var(--s4) 0 var(--s3)}.research-card summary p{color:var(--muted)}.research-card summary span{position:absolute;bottom:1.5rem;font:700 var(--fs-sm) var(--font-mono)}.research-card details>div{padding:0 var(--s4) var(--s4);border-top:var(--border)}.research-card details>div p{padding:var(--s3) 0}

/* 19. Search */
.search-box{display:grid;grid-template-columns:1fr auto;gap:.5rem 1rem;margin-bottom:var(--s4);padding:var(--s4);background:var(--cloud)}.search-box label{grid-column:1/-1}.search-box>div{display:flex}.search-box input{width:min(100%,680px);min-height:50px;border:1px solid var(--storm);background:var(--white);padding:.75rem 1rem}.search-box button{margin-left:.5rem}.search-box p{font-family:var(--font-mono);align-self:center}.no-results{padding:var(--s5);text-align:center;background:var(--clay)}

/* 20. About */
.about .container{display:grid;grid-template-columns:1.1fr .9fr;gap:var(--s6)}.about-copy>p:not(.eyebrow){margin-top:var(--s3)}.principles{border-left:var(--border)}.principles article{padding:var(--s4);border-bottom:var(--border)}.principles b{font-family:var(--font-mono);color:var(--oxide)}.principles h3{margin:var(--s2) 0}

/* 21. Final CTA */
.final-cta{position:relative;padding:clamp(6rem,12vw,11rem) 0;background:var(--olive-wash);overflow:hidden}.final-cta .container{position:relative;z-index:2}.final-cta h2{max-width:760px}.final-cta .container>p:not(.eyebrow){max-width:680px;margin-top:var(--s3)}.threshold-line{position:absolute;left:0;right:0;top:50%;display:grid;grid-template-columns:1fr 4px 1fr;align-items:center;border-top:2px solid var(--storm);font:700 .75rem var(--font-mono);color:var(--storm)}.threshold-line i{height:100vh;background:var(--solar);transform:translateY(-50%)}.threshold-line span{padding:1rem}.threshold-line span:last-child{text-align:right}

/* 22. Footer */
footer{background:var(--aubergine);color:var(--white);padding:var(--s5) 0}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:var(--s4)}footer img{width:58px;margin-bottom:var(--s3)}footer h2{color:var(--white);font-size:2rem}footer nav{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}footer nav a{text-decoration:none}footer nav a:hover{text-decoration:underline}.footer-grid>p{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.2);padding-top:var(--s3);font-size:.8rem}.back-to-top{position:fixed;right:1rem;bottom:1rem;z-index:50;background:var(--solar);color:var(--aubergine);padding:.65rem .85rem;text-decoration:none;font:700 .75rem var(--font-mono);opacity:0;pointer-events:none;transform:translateY(10px);transition:var(--transition)}.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:none}

/* 23. Reveal states */
.reveal{opacity:1;transform:none}.js-enabled .reveal{opacity:0;transform:translateY(24px);transition:opacity 650ms ease,transform 650ms ease}.js-enabled .reveal.is-visible{opacity:1;transform:none}

/* 24. Responsive */
@media(max-width:1050px){.menu-toggle{display:block}.site-header nav{display:none;position:absolute;left:0;right:0;top:78px;background:var(--parchment);padding:1.25rem;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-header nav.is-open{display:flex}.site-header nav a{font-size:1rem;padding:.45rem}.conditions-grid,.profiles{grid-template-columns:1fr 1fr}.condition:nth-child(3){border-left:0}.condition:nth-child(n+3){border-top:var(--border)}.profile.offset{margin-top:0}}
@media(max-width:760px){:root{--s6:4.5rem}.container{width:min(calc(100% - 1.5rem),var(--container))}.brand{width:210px}.hero-copy::after{display:none}.track{grid-template-columns:1fr}.track p,.track small{grid-column:1}.track-visual{margin:1.5rem 0}.instrument-foot,.critical-band .container,.about .container,.independence .container>div,.checklist{grid-template-columns:1fr}.critical-band ul,.conditions-grid,.profiles,.card-grid{grid-template-columns:1fr}.condition+.condition{border-left:0;border-top:var(--border)}.crossing{grid-template-columns:1fr}.crossing>b{writing-mode:horizontal-tb;min-height:48px;border-inline:0;border-block:1px solid var(--solar)}.method-grid{grid-template-columns:1fr}.method-grid article,.method-grid article:nth-child(4),.method-grid article:nth-child(5),.method-grid article:nth-child(6){grid-column:1;grid-row:auto}.method-grid article::after{content:"↓"!important;left:50%!important;right:auto!important;top:auto!important;bottom:-18px!important}.method-grid article:last-child::after{display:none}.checklist{padding:var(--s4)}.checklist ul{columns:1}.search-box{grid-template-columns:1fr}.search-box>div{flex-direction:column}.search-box button{margin:.5rem 0 0}.footer-grid{grid-template-columns:1fr}.threshold-line{top:42%}}
@media(max-width:380px){h1{font-size:2.5rem}.brand{width:185px}.instrument{padding:1rem}.track-visual span{font-size:.56rem}.profile{padding:1.4rem}.contact a{font-size:.72rem}}

/* 25. Reduced motion */
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.js-enabled .reveal{opacity:1;transform:none}.button:hover{transform:none}}