@font-face{font-family:Geist;src:url('/assets/fonts/geist-400-normal.ttf') format('truetype');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:Geist;src:url('/assets/fonts/geist-600-normal.ttf') format('truetype');font-style:normal;font-weight:600;font-display:swap}
@font-face{font-family:Geist;src:url('/assets/fonts/geist-700-normal.ttf') format('truetype');font-style:normal;font-weight:700;font-display:swap}
@font-face{font-family:Geist;src:url('/assets/fonts/geist-800-normal.ttf') format('truetype');font-style:normal;font-weight:800;font-display:swap}

/* Navy ink and one orange on near-white. --accent-ink is the orange darkened for small text. */
:root{
  --paper:#f7f8fc;--ink:#0d1230;--muted:#50556f;--line:#d3d7e6;
  --accent:#ff5a1f;--accent-ink:#c2380a;
  --sans:Geist,Arial,sans-serif;
  --g:clamp(20px,4vw,64px);
  --ease:cubic-bezier(.22,1,.36,1);--snap:cubic-bezier(.2,.9,.25,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--accent);color:var(--ink)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation}
button,a{-webkit-tap-highlight-color:transparent}
img,svg{display:block;max-width:100%}
h1,h2,h3,p,ul,dl,dd{margin:0;padding:0}
ul{list-style:none}
h1,h2,h3{font-weight:800;line-height:.95;letter-spacing:-.055em}
h1 em,h2 em,h3 em{font-style:normal}
h2{font-size:clamp(38px,6.4vw,132px)}
:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.skip{position:fixed;top:10px;left:10px;padding:10px 20px;background:var(--ink);color:var(--paper);transform:translateY(-150%);z-index:100}
.skip:focus{transform:translateY(0)}

/* Buttons and links */
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 24px;font-size:17px;font-weight:700;line-height:1.2;border:0;background:var(--ink);color:var(--paper);box-shadow:6px 6px 0 var(--accent);transition:transform .12s var(--snap),box-shadow .12s var(--snap)}
.button:hover{transform:translate(3px,3px);box-shadow:3px 3px 0 var(--accent)}
.button:active{transform:translate(6px,6px);box-shadow:0 0 0 var(--accent)}
.button svg{width:20px;height:20px}
.button-paper{background:var(--paper);color:var(--ink)}
.underline-link{display:inline-flex;align-items:center;gap:12px;font-size:17px;font-weight:700;border-bottom:3px solid var(--accent);padding-bottom:2px;transition:border-color .12s}
.underline-link:hover{border-color:currentColor}
.underline-link svg{width:19px;height:19px}

/* The ghost: one drawing at every size. Eyes are moved by site.js. */
.ghost{display:block;color:var(--accent);mix-blend-mode:multiply;pointer-events:none}
.ghost svg{width:100%;height:auto;overflow:visible}
.ghost-blink{stroke:var(--paper);transform-box:fill-box;transform-origin:center;animation:blink 5.5s infinite}
@keyframes blink{0%,95.5%,100%{transform:scaleY(1)}97.5%{transform:scaleY(.08)}}

/* The cursor, built by site.js for mouse users: a dot for aim and a small ghost that trails it. */
.has-cursor,.has-cursor *{cursor:none!important}
.cursor{position:fixed;top:0;left:0;z-index:1000;pointer-events:none;color:var(--ink);--haunt:var(--accent);opacity:0;transition:opacity .2s}
.cursor.is-on{opacity:1}
.cursor[data-tone=ink]{color:var(--paper)}
.cursor[data-tone=accent]{--haunt:var(--ink)}
.cursor>div{position:absolute;top:0;left:0;will-change:transform}
.cursor-dot i{display:block;width:10px;height:10px;margin:-5px 0 0 -5px;border:2.5px solid;border-radius:50%;background:currentColor;transition:width .18s var(--snap),height .18s var(--snap),margin .18s var(--snap),background-color .12s}
.cursor.is-link .cursor-dot i{width:44px;height:44px;margin:-22px 0 0 -22px;background:transparent}
.cursor.is-down .cursor-dot i{width:6px;height:6px;margin:-3px 0 0 -3px}
.cursor.is-link.is-down .cursor-dot i{width:32px;height:32px;margin:-16px 0 0 -16px}
.cursor.is-text .cursor-dot i{width:3px;height:24px;margin:-12px 0 0 -1.5px;border:0;border-radius:0}
.cursor .ghost{width:30px;margin:-16px 0 0 -15px;color:var(--haunt);mix-blend-mode:normal;transition:scale .2s var(--snap),color .15s}
.cursor-ghost .ghost{animation:haunt 3.2s ease-in-out infinite}
.cursor.is-link .cursor-ghost .ghost{scale:1.25}
.cursor.is-down .cursor-ghost .ghost{scale:.78}
.cursor-echo{opacity:0}
@keyframes haunt{50%{translate:0 -4px}}
.tap-ghost{position:fixed;z-index:1000;width:34px;margin:-58px 0 0 -17px;mix-blend-mode:normal;animation:tap-rise .75s var(--ease) both}
.tap-ghost[data-tone=accent]{color:var(--ink)}
@keyframes tap-rise{from{opacity:0;transform:translateY(22px) scale(.6)}30%{opacity:1}to{opacity:0;transform:translateY(-22px)}}

/* Header */
.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px var(--g);position:relative;z-index:30}
.brand{display:flex;align-items:center;gap:10px;font-size:clamp(19px,5vw,26px);font-weight:800;line-height:1;letter-spacing:-.04em;white-space:nowrap}
.brand .ghost{width:26px;flex-shrink:0}
.navigation{display:flex;align-items:center;white-space:nowrap;gap:clamp(16px,2.6vw,38px);font-size:16px;font-weight:600;line-height:1.3}
.navigation>a:not(.nav-member){border-bottom:3px solid transparent;padding-block:4px;transition:border-color .12s}
.navigation>a:not(.nav-member):hover,.navigation>a[aria-current]:not(.nav-member){border-color:var(--accent)}
.nav-learn{position:relative}
.nav-learn-toggle{display:inline-flex;align-items:center;gap:7px;font:inherit;color:inherit;background:none;border:0;border-bottom:3px solid transparent;padding:4px 0;cursor:pointer;transition:border-color .12s}
.nav-learn-toggle:hover,.nav-learn.is-open .nav-learn-toggle{border-color:var(--accent)}
.nav-learn-toggle svg{transition:transform .2s}
.nav-learn.is-open .nav-learn-toggle svg{transform:rotate(180deg)}
.learn-menu{position:absolute;top:calc(100% + 14px);left:-18px;width:310px;display:none;gap:2px;padding:8px;background:var(--paper);border:3px solid var(--ink);box-shadow:8px 8px 0 var(--ink);white-space:normal}
.nav-learn.is-open .learn-menu{display:grid}
.learn-menu a{display:grid;gap:2px;padding:11px 12px}
.learn-menu a:hover,.learn-menu a:focus-visible{background:var(--ink);color:var(--paper)}
.learn-menu strong{font-size:16px}
.learn-menu span{font-size:14px;font-weight:500;color:var(--muted)}
.learn-menu a:hover span,.learn-menu a:focus-visible span{color:var(--paper)}
.nav-member{border:2px solid var(--ink);padding:9px 16px;transition:background .12s,color .12s}
.nav-member:hover{background:var(--ink);color:var(--paper)}
.menu-toggle{display:none;width:44px;height:44px;border:0;background:none;padding:12px}
.menu-toggle span{display:block;height:2px;background:var(--ink);margin:6px 0;transition:transform .3s}

/* Hero. The ghost is sized and placed in headline ems so it overprints the same letters at every width. */
.hero{--h1:clamp(36px,min(13vw,21svh),340px);position:relative;padding:clamp(8px,2vh,28px) var(--g) clamp(40px,6vh,72px)}
.hero h1{font-size:var(--h1);line-height:.9}
.hero h1 span{display:block;animation:rise .55s var(--snap) both}
.hero h1 span:nth-child(2){animation-delay:.07s}
.hero h1 span:nth-child(3){animation-delay:.14s}
@keyframes rise{from{opacity:0;transform:translateY(.28em)}}
.hero-ghost{position:absolute;z-index:2;left:calc(var(--g) + var(--h1)*4.7);top:calc(var(--h1)*.95);width:calc(var(--h1)*2.5);transform:translate(calc(var(--mx,0)*16px),calc(var(--my,0)*12px)) rotate(7deg);animation:land .7s .25s var(--snap) both}
@keyframes land{from{opacity:0;translate:0 -60px}}
.hero-row{display:grid;gap:28px;max-width:36ch;margin-top:clamp(28px,5vh,52px)}
.hero-row strong{display:block;font-weight:700;margin-bottom:6px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 26px;padding-bottom:6px}

/* Topic band */
.topic-band{background:var(--accent);padding:26px var(--g);display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px 40px;font-size:16px;font-weight:600}
.topic-band ul{display:flex;flex-wrap:wrap;gap:6px clamp(20px,4vw,56px);font-weight:800;font-size:clamp(24px,3vw,40px);letter-spacing:-.04em;line-height:1.1}

/* Landing sections */
.land{padding:clamp(72px,11vw,150px) var(--g)}
.halftone{background:radial-gradient(circle,var(--ink) 0 46%,transparent 49%) 0 0/.042em .042em;-webkit-background-clip:text;background-clip:text;color:transparent}
.perspective-columns{display:grid;grid-template-columns:5fr 6fr;gap:clamp(28px,6vw,96px);margin-top:clamp(36px,5vw,72px);align-items:start}
.perspective-lede{font-size:clamp(26px,2.9vw,40px);line-height:1.18;letter-spacing:-.03em}
.perspective-columns div p{max-width:52ch;margin-bottom:1em}
.perspective-columns .underline-link{margin-top:10px}

.notes-section{padding-top:0}
.notes-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:20px 40px;margin-bottom:clamp(32px,4vw,56px)}
.notes-head p{max-width:26ch}
.note-row{position:relative;isolation:isolate;display:grid;grid-template-columns:2fr 8fr 1fr;gap:8px 32px;align-items:baseline;padding:28px 14px;border-top:3px solid var(--ink);font-size:16px;font-weight:600}
.notes-list li:last-child .note-row{border-bottom:3px solid var(--ink)}
.note-row::before{content:'';position:absolute;inset:0;z-index:-1;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--snap)}
.note-row:hover::before,.note-row:focus-visible::before{transform:scaleX(1)}
.note-row h3{font-size:clamp(26px,3.4vw,62px);line-height:1;letter-spacing:-.045em;transition:transform .22s var(--snap)}
.note-row:hover h3{transform:translateX(10px)}
.note-row p{margin-top:10px;max-width:48ch;font-size:18px;font-weight:400}
.note-time{text-align:right;white-space:nowrap}

/* Learning. Orange is above ground, ink is below it. The headline straddles the ground line and its roots run down to the four guides. */
.learning-section{--h2:clamp(52px,10.4vw,190px);--pad:clamp(72px,11vw,150px);--step:clamp(12px,2.4vw,36px);--root:4px;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto calc(var(--h2)*.9) calc(var(--h2)*.9);padding-top:0;background:var(--ink);color:var(--paper);overflow:clip}
.learning-section :focus-visible{outline-color:currentColor}
.learning-sky{grid-column:1;grid-row:1/3;margin-inline:calc(var(--g)*-1);background:var(--accent)}
.learning-lede{grid-column:1;grid-row:1;padding:var(--pad) 0 clamp(20px,3vw,48px);color:var(--ink);font-size:clamp(26px,2.9vw,40px);line-height:1.18;letter-spacing:-.03em}
.learning-section h2{grid-column:1;grid-row:2/4;font-size:var(--h2);line-height:.9;white-space:nowrap}
.learning-section h2 span{display:block}
.learning-section h2 span:first-child{color:var(--ink);transform:translateY(.065em)}
.learning-roots{width:100%;height:clamp(150px,19vw,300px);overflow:visible;clip-path:inset(0)}
.learning-roots path{stroke:var(--accent);stroke-width:var(--root);stroke-linecap:round;vector-effect:non-scaling-stroke;transition:stroke .15s}
.learning-roots .roots-fine path{stroke-width:1.5px;opacity:.6}
.root-books{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.root-books li{position:relative;display:flex;justify-content:center;padding-top:calc(var(--step)*var(--depth,0))}
.root-books li:nth-child(2){--depth:3}
.root-books li:nth-child(3){--depth:1}
.root-books li:nth-child(4){--depth:4}
.root-books li::before{content:'';position:absolute;top:-1px;left:calc(50% - var(--root)/2);width:var(--root);height:calc(var(--step)*var(--depth,0) + 2px);background:var(--accent);transform-origin:top}
.root-books a{display:block;width:min(76%,250px)}
.root-books img{width:100%;height:auto;box-shadow:8px 8px 0 var(--accent);transition:transform .15s var(--snap),box-shadow .15s var(--snap)}
.root-books a:hover img,.root-books a:focus-visible img{transform:translate(-5px,-5px);box-shadow:13px 13px 0 var(--accent)}
.root-books h3{margin-top:28px;font-size:clamp(18px,1.6vw,24px);line-height:1.1;letter-spacing:-.03em}
.root-books p{margin-top:8px;font-size:16px;line-height:1.45;color:#b9bed6}
/* The root feeding a guide lights up while that guide is hovered or focused. */
.root-books li:has(a:hover)::before,.root-books li:has(a:focus-visible)::before{background:var(--paper)}
.learning-section:has(.root-books li:nth-child(1) a:is(:hover,:focus-visible)) .roots-main path:nth-child(1),
.learning-section:has(.root-books li:nth-child(2) a:is(:hover,:focus-visible)) .roots-main path:nth-child(2),
.learning-section:has(.root-books li:nth-child(3) a:is(:hover,:focus-visible)) .roots-main path:nth-child(3),
.learning-section:has(.root-books li:nth-child(4) a:is(:hover,:focus-visible)) .roots-main path:nth-child(4){stroke:var(--paper)}
.learning-copy{display:grid;grid-template-columns:5fr 6fr;gap:clamp(28px,6vw,96px);align-items:start;margin-top:clamp(64px,8vw,120px);padding-top:clamp(28px,3vw,44px);border-top:3px solid var(--paper)}
.learning-claim{max-width:20ch;font-size:clamp(26px,2.9vw,40px);line-height:1.18;letter-spacing:-.03em}
.learning-copy div p{max-width:46ch;color:#b9bed6}
.learning-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;margin-top:30px}
.learning-actions .underline-link{border-color:var(--accent)}
/* Where scroll timelines exist, the roots grow with the scroll: their tips track a line 70% down the viewport. */
@keyframes root-grow{from{clip-path:inset(0 0 100% 0)}}
@keyframes stem-grow{from{transform:scaleY(0)}}
@keyframes book-land{from{opacity:0;transform:translateY(-18px)}}
@media(prefers-reduced-motion:no-preference){@supports(animation-timeline:view()){
  .learning-roots{animation:root-grow linear both;animation-timeline:view();animation-range:cover 30vh cover calc(100% - 70vh)}
  .root-books li::before,.root-books::before{animation:stem-grow linear both;animation-timeline:view();animation-range:cover 30vh cover calc(100% - 70vh)}
  .root-books a{animation:book-land linear both;animation-timeline:view();animation-range:cover 30vh cover calc(30vh + 130px)}
}}
/* Elsewhere site.js plays the same growth once, the first time the guides scroll into view. */
.learning-section[data-roots=grown] .learning-roots{transition:clip-path 1.1s var(--ease)}
.learning-section[data-roots=grown] .root-books li::before{transition:transform .25s linear 1s}
.learning-section[data-roots=grown] .root-books a{transition:opacity .45s var(--ease),transform .45s var(--snap);transition-delay:calc(1.15s + var(--depth,0)*.08s)}
.learning-section[data-roots=waiting] .learning-roots{clip-path:inset(0 0 100% 0)}
.learning-section[data-roots=waiting] .root-books li::before,.learning-section[data-roots=waiting] .root-books::before{transform:scaleY(0)}
.learning-section[data-roots=waiting] .root-books a{opacity:0;transform:translateY(-18px)}

.connect-section{display:grid;grid-template-columns:7fr 4fr;gap:clamp(32px,6vw,96px);align-items:end}
.connect-section h2{font-size:clamp(38px,5.4vw,112px)}
.connect-section>div>p{max-width:46ch;margin-top:28px}
.connect-card{border:3px solid var(--ink);padding:30px;box-shadow:10px 10px 0 var(--accent);background:var(--paper)}
.connect-card h3{font-size:clamp(30px,3vw,42px);line-height:1}
.connect-card p{margin:14px 0 24px}

/* Footer */
.site-footer{border-top:3px solid var(--ink);padding:36px var(--g) 22px;font-size:16px;font-weight:600;line-height:1.3}
.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px 40px}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 30px}
.footer-links a:hover,.footer-bottom a:hover{color:var(--accent-ink)}
/* 7.82 = set width of the wordmark in ems, so it spans the page at any size. */
.footer-wordmark{position:relative;overflow:hidden;font-size:calc((100vw - 2*var(--g))/7.82);font-weight:800;letter-spacing:-.055em;line-height:.9;white-space:nowrap;margin:clamp(28px,5vw,70px) 0 clamp(20px,3vw,40px);padding-bottom:.06em}
.footer-wordmark .ghost{position:absolute;right:9%;bottom:-.27em;width:.62em;transform:rotate(-6deg)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 28px;font-size:14px}

/* Inner pages share the landing page's parts: big title, rules, orange bands, flood rows. */
.page-hero{position:relative;padding:clamp(8px,2vh,28px) var(--g) clamp(48px,7vw,96px)}
.page-title{font-size:clamp(48px,min(13vw,24svh),260px);line-height:.9;margin-top:clamp(12px,2vw,28px)}
.back-link{display:inline-block;font-size:15px;font-weight:600;color:var(--muted);padding:10px 0}
.back-link:hover{color:var(--accent-ink)}
.page-welcome{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:20px 40px;margin-top:clamp(28px,4vw,56px)}

/* Book rows: DSA page and member library */
.guides{padding:0 var(--g)}
.guide{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,6vw,96px);align-items:center;padding:clamp(56px,8vw,110px) 0}
.guide+.guide{border-top:3px solid var(--ink)}
.guide-cover{display:grid;place-items:center}
.guide-cover img{width:min(340px,72%);height:auto;box-shadow:12px 12px 0 var(--ink);transform:rotate(-6deg);transition:transform .3s var(--snap)}
.guide:nth-child(even) .guide-cover{order:2}
.guide:nth-child(even) .guide-cover img{box-shadow:12px 12px 0 var(--accent);transform:rotate(6deg)}
.guide .guide-cover:hover img{transform:rotate(0) translateY(-8px)}
.guide-meta{display:flex;flex-wrap:wrap;gap:6px 28px;font-size:15px;font-weight:600}
.guide-meta span:first-child{color:var(--accent-ink)}
.guide h2{font-size:clamp(38px,5vw,96px);margin:14px 0 18px}
.guide-info p{max-width:46ch}
.guide-info .perspective-lede{margin-bottom:.6em}
.guide-topics{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 30px}
.guide-topics li{font-size:15px;font-weight:600;border:2px solid var(--ink);padding:5px 12px}
.guide-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;margin-top:28px}
.guide-topics+.guide-actions{margin-top:0}
.download-meta{display:block;margin-top:20px;font-size:15px;color:var(--muted)}
.member-books .guide{padding-block:clamp(40px,5vw,72px)}
.member-books .guide-cover img{width:min(240px,60%)}

/* Orange practice band */
.practice{background:var(--accent)}
.practice :focus-visible{outline-color:currentColor}
.practice .button{box-shadow:6px 6px 0 var(--ink)}
.practice .button:hover{box-shadow:3px 3px 0 var(--ink)}
.practice .button:active{box-shadow:0 0 0 var(--ink)}
.practice-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:20px 40px;margin-bottom:clamp(36px,5vw,64px)}
.practice-head p{max-width:26ch;font-weight:600}
.practice-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,48px);margin:0;padding:0;list-style:none}
.practice-steps li{border-top:3px solid var(--ink);padding-top:18px}
.practice-steps span{display:block;font-size:clamp(56px,7vw,112px);font-weight:800;letter-spacing:-.055em;line-height:1}
.practice-steps h3{font-size:clamp(26px,2.6vw,38px);margin:14px 0 12px}
.practice-steps p{max-width:34ch}
.member-study{display:grid;justify-items:start;gap:22px;font-weight:600}
.member-study h2{font-size:clamp(30px,4.4vw,80px)}
.more-guides{display:grid;justify-items:start;gap:22px}
.more-guides h2{font-size:clamp(34px,5vw,96px);max-width:14em}
.more-guides p{max-width:46ch}
.practice+.more-guides{padding-block:clamp(56px,8vw,110px)}
.attribution{padding:28px var(--g);font-size:14px;color:var(--muted)}
.attribution a{text-decoration:underline;text-underline-offset:3px}

/* Reading pages: title spans the page, text sits in an offset column. */
.article-shell{padding:clamp(8px,2vh,28px) var(--g) clamp(48px,7vw,90px)}
.note-meta{display:flex;flex-wrap:wrap;gap:6px 28px;font-size:15px;font-weight:600;margin-top:clamp(12px,2vw,28px)}
.note-meta span:first-child{color:var(--accent-ink)}
.article-shell h1{font-size:clamp(44px,8.4vw,150px);line-height:.92;max-width:11em;margin:14px 0 clamp(36px,6vw,80px)}
.article-content,.article-end{max-width:66ch;margin-left:min(25vw,360px)}
.article-content{font-size:19px;line-height:1.7}
.page-title+.article-content{margin-top:clamp(36px,6vw,80px)}
.article-content p{margin-bottom:1.3em}
.article-content p a,.article-content li a{text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:3px;text-underline-offset:4px}
.article-content .article-lead{font-size:clamp(24px,2.4vw,32px);font-weight:600;line-height:1.25;letter-spacing:-.03em}
.article-date{font-size:15px;font-weight:600;color:var(--muted)}
.article-content h2{font-size:clamp(28px,2.6vw,36px);line-height:1.05;letter-spacing:-.045em;margin:48px 0 18px}
.article-content blockquote{margin:44px 0;padding:28px 32px;background:var(--accent);font-size:clamp(26px,3vw,40px);font-weight:800;line-height:1.05;letter-spacing:-.045em}
.article-end{border-top:3px solid var(--ink);margin-top:56px;padding-top:24px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;font-weight:600}
.haunt-index{padding-top:clamp(24px,4vw,56px)}
.haunt-index h1{font-size:clamp(56px,10vw,180px);line-height:.9;letter-spacing:-.06em}
.haunt-follow{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px 32px;margin-top:28px;font-weight:600}
.article-content ul{margin:0 0 1.3em 1.2em;list-style:disc}
.article-content li{margin-bottom:.4em}
.article-content code{font-size:.9em;padding:.1em .35em;background:var(--accent)}
.article-content h3{font-size:clamp(21px,2vw,26px);line-height:1.15;letter-spacing:-.03em;margin:36px 0 12px}
.article-content table{width:100%;border-collapse:collapse;margin:0 0 1.6em;font-size:16px;line-height:1.4}
.article-content th,.article-content td{text-align:left;padding:10px 12px 10px 0;border-bottom:2px solid var(--ink);vertical-align:top}
.article-content th{font-weight:800}
.article-content td:not(:first-child),.article-content th:not(:first-child){text-align:right;padding-left:12px;white-space:nowrap}

/* DSA book landing pages: what the book teaches, then the full contents. */
.dsa-contents-link{display:inline-block;margin-top:18px}
.dsa-title{font-size:clamp(44px,min(9vw,16svh),170px)}
.dsa-specifics h2{font-size:clamp(34px,4.6vw,84px);line-height:.95;max-width:14em;margin-bottom:clamp(32px,4vw,56px)}
.dsa-specifics ul{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;border-top:3px solid var(--ink);padding-top:28px}
.dsa-specifics h3{font-size:clamp(22px,1.9vw,28px);line-height:1.05;letter-spacing:-.035em;margin-bottom:12px}
.dsa-specifics p{font-size:17px;line-height:1.5}
.dsa-specifics code,.dsa-chapters code{font-size:.92em;padding:.05em .3em;background:var(--accent)}
.dsa-chapters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(28px,4vw,64px);border-top:3px solid var(--ink);margin-bottom:clamp(32px,4vw,48px)}
.dsa-chapters li{display:grid;grid-template-columns:3ch 1fr;gap:16px;padding:20px 0;border-bottom:2px solid var(--line)}
.dsa-chapters span{font-weight:800;color:var(--accent-ink)}
.dsa-chapters h3{font-size:20px;line-height:1.15;letter-spacing:-.02em}
.dsa-chapters p{margin-top:6px;font-size:16px;line-height:1.45;color:var(--muted)}
@media(max-width:1100px){.dsa-specifics ul{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:860px){.dsa-specifics ul,.dsa-chapters{grid-template-columns:minmax(0,1fr)}}

/* Role picker: one door per reader, on the home page. */
.role-picker h2{font-size:clamp(40px,6.4vw,120px);line-height:.92;margin-bottom:clamp(32px,4vw,56px)}
.role-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:3px solid var(--ink)}
.role-grid a{position:relative;isolation:isolate;display:flex;flex-direction:column;gap:14px;height:100%;padding:28px 22px 36px 0;border-bottom:3px solid var(--ink)}
.role-grid li+li a{padding-left:22px;border-left:3px solid var(--ink)}
.role-grid a::before{content:'';position:absolute;inset:0;z-index:-1;background:var(--accent);transform:scaleY(0);transform-origin:bottom;transition:transform .22s var(--snap)}
.role-grid a:hover::before,.role-grid a:focus-visible::before{transform:scaleY(1)}
.role-grid strong{font-size:clamp(26px,2.6vw,44px);font-weight:800;line-height:1;letter-spacing:-.045em}
.role-grid span{font-size:17px;line-height:1.4;max-width:22ch}
.role-jump{display:flex;flex-wrap:wrap;gap:10px 28px;margin-bottom:clamp(24px,3vw,40px);font-weight:700}
.role-jump a{text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:3px;text-underline-offset:5px}
.role-kits{scroll-margin-top:90px;margin-top:clamp(40px,5vw,72px)}
.role-kits-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px 40px;margin-bottom:20px}
.role-kits-head h3{font-size:clamp(30px,3.6vw,56px);line-height:1;letter-spacing:-.045em}
.role-kits-head p{max-width:52ch;font-size:18px}
@media(max-width:1100px){.role-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.role-grid li:nth-child(3n+1) a{padding-left:0;border-left:0}}
@media(max-width:860px){.role-grid{grid-template-columns:minmax(0,1fr)}.role-grid li a,.role-grid li+li a,.role-grid li:nth-child(3n+1) a{padding:22px 8px;border-left:0}}

/* Team kits: reference documents with numbered steps, notes and tables. */
.kit .kit-actions{margin-top:0}
.kit .download-meta{margin-bottom:12px}
.article-content ol{margin:0 0 1.3em 1.6em;list-style:decimal}
.article-content ol li::marker{font-weight:800}
.article-content hr{border:0;border-top:3px solid var(--ink);margin:48px 0 24px}
.article-content hr~p{font-size:16px;color:var(--muted)}
.article-content pre{margin:0 0 1.6em;padding:20px 22px;overflow-x:auto;background:var(--ink);color:var(--paper);font-size:15px;line-height:1.6}
.article-content pre code{padding:0;background:none;font-size:inherit;white-space:pre-wrap}
.kit-note{margin:32px 0;padding:22px 26px;border-left:6px solid var(--accent);background:#fff;font-size:17px;line-height:1.6}
.kit-table{margin:0 0 1.6em;overflow-x:auto}
.kit-table table{width:100%;border-collapse:collapse;font-size:16px;line-height:1.5}
.kit-table th,.kit-table td{padding:12px 14px 12px 0;border-bottom:2px solid var(--line);text-align:left;vertical-align:top}
.kit-table th{border-bottom:3px solid var(--ink);font-weight:800}
.kit-table td:first-child{font-weight:700}
.next-note{padding:0 var(--g) clamp(56px,8vw,100px)}
.next-note .note-row{border-bottom:3px solid var(--ink)}

/* Not found */
.lost{min-height:62svh}
.lost p{margin:clamp(24px,4vw,48px) 0 28px;font-size:clamp(22px,2.2vw,30px);letter-spacing:-.03em}
.lost-ghost{position:absolute;right:var(--g);bottom:0;width:min(30vw,340px);transform:translate(calc(var(--mx,0)*16px),calc(var(--my,0)*12px)) rotate(8deg)}

/* Play mode: the hero ghost wakes up, breaks the page and heals it. Driven by play.js. */
:root{--heal:#0c9b6f}
.play-toggle{position:absolute;right:var(--g);top:6px;z-index:3;display:inline-flex;align-items:center;gap:8px;padding:6px 2px;font-size:14px;font-weight:600;line-height:1.2;color:var(--muted);background:none;border:0;border-bottom:2px dashed var(--line);transition:color .12s,border-color .12s}
.play-toggle[hidden]{display:none}
.play-toggle::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--accent);animation:beckon 2.4s 1.2s 3}
.play-toggle:hover,.play-toggle:focus-visible{color:var(--ink);border-color:var(--accent)}
@keyframes beckon{0%,100%{box-shadow:0 0 0 0 rgb(255 90 31/.55)}60%{box-shadow:0 0 0 9px rgb(255 90 31/0)}}
/* The game draws its own cursor on the canvas, so the system one is hidden over the arena. */
.is-playing,.is-playing *{cursor:none}
.is-playing{-webkit-user-select:none;user-select:none}
.is-aiming .cursor.is-on{opacity:0}
.is-playing .hero-ghost{visibility:hidden}
.hero h1 span.play-word,.play-word{display:inline;white-space:nowrap;animation:none}
.hero h1 span.play-bit,.play-bit{display:inline-block;animation:none;will-change:transform}
.play-whole{transition:none}
.play-canvas{position:fixed;inset:0;width:100%;height:100%;z-index:50;pointer-events:none}
.play-ghost{position:fixed;left:0;top:0;width:40px;z-index:51;will-change:transform}
.play-ghost.is-heal{color:var(--heal)}
.play-hud{position:fixed;right:24px;bottom:24px;z-index:60;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;width:344px;max-width:calc(100vw - 24px);padding:8px;background:var(--paper);border:3px solid var(--ink);box-shadow:6px 6px 0 var(--ink);font-size:15px;font-weight:700;line-height:1.2}
.play-hud button{flex:1 1 calc(50% - 4px);padding:9px 14px;border:2px solid var(--ink);background:none;white-space:nowrap}
.play-hud button:hover{background:var(--ink);color:var(--paper)}
.play-hud button[aria-pressed=true]{background:var(--accent);color:var(--ink)}
.play-hud .play-heal[aria-pressed=true]{background:var(--heal)}
.play-status{flex-basis:100%;order:1;text-align:center;font-weight:600;font-variant-numeric:tabular-nums}
.play-hint{flex-basis:100%;order:2;text-align:center;font-size:12px;line-height:1.5;font-weight:500;color:var(--muted)}
@media(hover:none){.play-hint{display:none}}

@media(max-width:860px){
  .hero-ghost{top:calc(var(--h1)*.5)}
  .play-toggle{position:static;margin-top:24px}
  .play-hud{left:50%;right:auto;bottom:12px;transform:translateX(-50%);width:max-content;gap:6px;padding:6px;font-size:14px}
  .play-hud button{padding:8px 10px}
  .play-hud button{flex:none}
  .play-status{flex-basis:auto;order:0;padding-inline:4px}
  .perspective-columns,.learning-section,.connect-section,.guide,.practice-steps{grid-template-columns:1fr}
  .note-row{grid-template-columns:1fr auto;padding-inline:8px}
  .note-row>div{grid-column:1/-1;grid-row:2}
  .learning-roots{display:none}
  .root-books{grid-template-columns:1fr;gap:28px;position:relative;padding-top:44px}
  .root-books::before{content:'';position:absolute;top:0;bottom:60px;left:calc(48px - var(--root)/2);width:var(--root);background:var(--accent);transform-origin:top}
  .learning-section[data-roots=grown] .root-books::before{transition:transform .9s var(--ease)}
  .root-books li{display:block;padding-top:0}
  .root-books li::before{content:none}
  .root-books a{display:grid;grid-template-columns:96px minmax(0,1fr);column-gap:24px;width:auto}
  .learning-section[data-roots=grown] .root-books a{transition-delay:calc(.25s + var(--depth,0)*.08s)}
  .root-books img{grid-row:1/3;position:relative;box-shadow:6px 6px 0 var(--accent)}
  .root-books h3{align-self:end;margin-top:0;font-size:20px}
  .root-books p{align-self:start}
  .learning-copy{grid-template-columns:1fr}
  .guide:nth-child(even) .guide-cover{order:0}
  .guide-cover{justify-items:start;padding:8px 0 20px 12px}
  .guide-cover img,.member-books .guide-cover img{width:min(220px,60%)}
  .article-content,.article-end{margin-left:0}
}
@media(max-width:1100px){
  .menu-toggle{display:block}
  .navigation{position:absolute;top:100%;left:0;right:0;background:var(--paper);border-block:3px solid var(--ink);padding:8px var(--g) 22px;flex-direction:column;align-items:stretch;gap:0;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s,transform .25s var(--snap),visibility .2s}
  .navigation>a:not(.nav-member){font-size:18px;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-member{margin-top:18px;text-align:center}
  .nav-learn{border-bottom:1px solid var(--line)}
  .nav-learn-toggle{width:100%;justify-content:space-between;font-size:18px;padding:14px 0;border:0}
  .learn-menu{position:static;width:auto;padding:0 0 10px 14px;border:0;box-shadow:none}
  .learn-menu a{padding:10px 0}
  .learn-menu a:hover,.learn-menu a:focus-visible{background:none;color:var(--accent-ink)}
  .learn-menu a:hover span,.learn-menu a:focus-visible span{color:var(--muted)}
  .navigation.is-open{opacity:1;visibility:visible;transform:none}
  .menu-toggle[aria-expanded=true] span:first-child{transform:translateY(4px) rotate(45deg)}
  .menu-toggle[aria-expanded=true] span:last-child{transform:translateY(-4px) rotate(-45deg)}
  .download-button{width:100%;justify-content:center}
  .article-content blockquote{padding:22px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{animation:none!important;transition:none!important}
}

/* Spot the ghost: a code review game. One file per level; every line is a button. */
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.stg-hero{padding:clamp(8px,2vh,28px) var(--g) clamp(28px,4vw,48px)}
.stg-hero h1{font-size:clamp(52px,10vw,170px);line-height:.9;margin-top:clamp(12px,2vw,24px)}
.stg-hero p{max-width:54ch;margin-top:20px;color:var(--muted)}
.stg-stage{padding:0 var(--g) clamp(72px,10vw,140px)}
.stg{--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;max-width:1120px}
.stg ol{margin:0;padding:0;list-style:none}
.stg h2,.stg h3{letter-spacing:-.045em;line-height:1}
.stg [tabindex="-1"]:focus{outline:none}
.stg-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;margin-bottom:22px}
.stg-count{font-weight:700}
.stg-progress{display:flex;gap:8px}
.stg-progress li{display:grid;place-items:center;width:38px;height:38px;border:2px solid var(--ink);font-size:16px;font-weight:800}
.stg-progress li[data-state=now]{background:var(--accent)}
.stg-progress li[data-state=todo]{border-color:var(--line);color:var(--muted)}
.stg-progress li[data-state=first],.stg-progress li[data-state=later],.stg-progress li[data-state=escaped]{background:#fff;font-size:19px}
.stg-progress li[data-state=escaped]{border-color:var(--accent)}
.stg-report{border-left:6px solid var(--accent);padding:4px 0 4px clamp(16px,2.4vw,28px)}
.stg-label{font-size:14px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink)}
.stg-report h2{font-size:clamp(30px,4.4vw,58px);margin-top:8px}
.stg-report blockquote{margin:14px 0 0;max-width:66ch;font-size:clamp(18px,1.6vw,21px);color:var(--muted)}
.stg-report blockquote::before{content:'“'}
.stg-report blockquote::after{content:'”'}
.stg-task{margin:clamp(26px,3vw,36px) 0 12px;font-weight:700}
.stg-task span{font-weight:600;color:var(--muted)}
.stg-file{background:var(--ink);color:#d9dcec;box-shadow:8px 8px 0 var(--accent);overflow-x:auto}
.stg-filename{padding:10px 18px;font:14px/1.4 var(--mono);color:#a3a8c4;border-bottom:1px solid rgba(255,255,255,.12)}
.stg-code{padding:10px 0;min-width:max-content;font:15px/1.55 var(--mono)}
.stg-code button{display:flex;width:100%;padding:1px 22px 1px 0;border:0;background:none;color:inherit;font:inherit;text-align:left}
.stg-code button:not(:disabled):hover{background:rgba(255,90,31,.2)}
.stg-code button:disabled{cursor:default}
.stg-code button:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}
.stg-code code{white-space:pre;font:inherit}
.stg-ln{flex:none;width:3.4em;padding-right:1.2em;text-align:right;color:#6d7396;user-select:none}
.tk-c{color:#8c92b3}.tk-s{color:#ffb08f}.tk-k{color:#fff;font-weight:700}.tk-n{color:#ffcf8a}
.stg-code li[data-state=missed] code{opacity:.4;text-decoration:line-through;text-decoration-color:var(--accent)}
.stg-code li[data-state=missed] .stg-ln{color:var(--accent)}
.stg-code li[data-state=other] button{background:rgba(255,90,31,.14);box-shadow:inset 3px 0 0 var(--accent)}
.stg-code li[data-state=haunted] button,.stg-code li[data-state=haunted] [class^=tk-]{background:var(--accent);color:var(--ink)}
.stg-code li[data-state=haunted] .stg-ln{color:var(--ink);font-weight:800}
.stg-status{min-height:1.6em;margin-top:22px;font-weight:600;color:var(--accent-ink)}
.stg-hint{margin-top:10px;max-width:70ch;padding:14px 18px;border:2px dashed var(--accent)}
.stg-reveal{margin-top:12px;padding-top:clamp(24px,3vw,36px);border-top:3px solid var(--ink)}
.stg-reveal h3{font-size:clamp(30px,4vw,52px)}
.stg-reveal h3[data-result=escaped]{color:var(--accent-ink)}
.stg-reveal>p{max-width:70ch;margin-top:16px}
.stg-diff{margin:22px 0 0;padding:14px 0;overflow-x:auto;background:var(--ink);font:15px/1.6 var(--mono)}
.stg-diff span{display:block;min-width:max-content;padding:0 20px;white-space:pre}
.stg-diff .del{background:rgba(255,90,31,.22);color:#ffc2a8}
.stg-diff .add{background:rgba(120,214,150,.16);color:#bff2cf}
.stg-reveal .stg-lesson{margin:20px 0 30px}
.stg-end .stg-progress{margin-bottom:clamp(24px,3vw,40px)}
.stg-score{font-size:clamp(52px,9vw,140px)}
.stg-score-line{max-width:52ch;margin-top:18px;font-size:clamp(19px,1.8vw,24px)}
.stg-share{display:inline-block;margin:28px 0 0;padding:16px 22px;border:2px solid var(--ink);background:#fff;font:17px/1.6 var(--mono);white-space:pre-wrap}
.stg-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px 32px;margin-top:30px}
.stg-actions .underline-link{padding:0 0 2px;border-width:0 0 3px;background:none}
.stg-next{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:clamp(48px,6vw,80px)}
.stg-next a{display:block;height:100%;padding-top:16px;border-top:3px solid var(--ink)}
.stg-next a:hover strong{color:var(--accent-ink)}
.stg-next strong{display:block;font-size:22px;letter-spacing:-.03em}
.stg-next span{display:block;margin-top:6px;font-size:16px;color:var(--muted)}
@media(max-width:860px){.stg-next{grid-template-columns:minmax(0,1fr)}.stg-code,.stg-diff{font-size:13px}.stg-progress li{width:34px;height:34px}}