[hidden]{display:none!important}
html.no-scroll{overflow:hidden}

/* animated background */
.bg-fx{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.bg-fx i{position:absolute;display:block;width:52vmax;height:52vmax;border-radius:50%;will-change:transform}
.bg-fx i:nth-child(1){left:-16vmax;top:-18vmax;background:radial-gradient(circle,rgba(59,176,143,.5),rgba(59,176,143,0) 66%);animation:wc-d1 26s ease-in-out infinite}
.bg-fx i:nth-child(2){right:-18vmax;top:12vh;background:radial-gradient(circle,rgba(150,222,214,.6),rgba(150,222,214,0) 66%);animation:wc-d2 31s ease-in-out infinite}
.bg-fx i:nth-child(3){left:22vw;bottom:-26vmax;background:radial-gradient(circle,rgba(228,240,176,.65),rgba(228,240,176,0) 66%);animation:wc-d3 36s ease-in-out infinite}
@keyframes wc-d1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(8vmax,6vmax) scale(1.15)}}
@keyframes wc-d2{0%,100%{transform:translate(0,0) scale(1.05)}50%{transform:translate(-9vmax,5vmax) scale(.9)}}
@keyframes wc-d3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(7vmax,-7vmax) scale(1.12)}}

/* reading progress */
.read-bar{position:fixed;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--brand),var(--brand-2));z-index:20001;pointer-events:none}

/* reveal */
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
.card.reveal.in{transition:opacity .6s ease,transform .6s ease,box-shadow .2s ease}
.card.reveal.in:hover{transform:translateY(-3px)}

/* marker highlights */
.article-content strong{background:linear-gradient(transparent 62%,#CDEFE2 62%);padding:0 2px;border-radius:2px}
.article-content h2{position:relative;padding-bottom:8px}
.article-content h2::after{content:"";position:absolute;left:0;bottom:0;height:4px;width:64px;border-radius:4px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transform:scaleX(0);transform-origin:left;transition:transform .7s ease .15s}
.article-content h2.in::after{transform:scaleX(1)}
.article-content mark,.mk{background:linear-gradient(transparent 55%,#CDEFE2 55%);color:inherit}

/* tl;dr */
.tldr{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:16px 20px 12px 26px;margin:0 0 24px}
.tldr::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(var(--brand),var(--brand-2))}
.tldr .tldr-t{margin:0 0 6px;font-size:18px;font-weight:800;letter-spacing:-.01em}
.tldr ul{margin:0;padding-left:1.1em;font-size:16px;line-height:1.6}
.tldr li{margin:4px 0}

/* glossary tooltip */
.term{border-bottom:2px dotted var(--brand);cursor:help;position:relative;outline-offset:2px}
.term::after{content:attr(data-tip);position:absolute;left:50%;bottom:calc(100% + 10px);transform:translateX(-50%) translateY(4px);width:max-content;max-width:min(280px,72vw);padding:10px 12px;background:var(--ink);color:#fff;border-radius:12px;font-size:14px;line-height:1.45;font-weight:400;z-index:50;opacity:0;visibility:hidden;transition:opacity .15s,transform .15s;pointer-events:none;box-shadow:0 10px 30px rgba(20,36,30,.25);text-align:left}
.term:hover::after,.term:focus::after{opacity:1;visibility:visible;transform:translateX(-50%)}

/* side rail */
.rail{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:9000;display:flex;flex-direction:column;gap:10px}
.rb{position:relative;width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(10px);color:var(--ink);display:flex;align-items:center;justify-content:center;font:800 13px var(--font);cursor:pointer;box-shadow:var(--shadow);transition:background .15s,color .15s,transform .15s}
.rb:hover,.rb:focus-visible{background:var(--brand);color:#0B2A21;border-color:var(--brand);transform:scale(1.06);text-decoration:none}
.rb::after{content:attr(data-tip);position:absolute;right:calc(100% + 10px);top:50%;transform:translateY(-50%);white-space:nowrap;background:var(--ink);color:#fff;font:600 13px var(--font);padding:6px 10px;border-radius:10px;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .15s}
.rb:hover::after,.rb:focus-visible::after{opacity:1;visibility:visible}
.rb-top{opacity:0;visibility:hidden;transform:translateY(8px)}
.rb-top.show{opacity:1;visibility:visible;transform:none}
.rb-age{border-color:var(--brand);color:var(--accent)}

/* toc panel */
.toc-panel{position:fixed;right:76px;top:50%;transform:translateY(-50%) translateX(14px);width:270px;max-height:70vh;overflow:auto;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:20px;padding:14px 16px;box-shadow:0 12px 40px rgba(20,36,30,.16);z-index:9001;opacity:0;visibility:hidden;transition:opacity .2s,transform .2s}
.toc-panel.open{opacity:1;visibility:visible;transform:translateY(-50%)}
.toc-title{margin:0 0 8px;font-size:15px;font-weight:800;text-transform:none}
.toc-panel ol{margin:0;padding:0;list-style:none;display:grid;gap:2px}
.toc-panel a{display:block;padding:6px 10px;border-radius:10px;color:var(--ink);font-size:14px;line-height:1.35}
.toc-panel a:hover{background:var(--brand-soft);text-decoration:none}
.toc-panel a.act{background:var(--brand-soft);color:var(--accent);font-weight:700}

/* popups */
.pop-ov{position:fixed;inset:0;z-index:20000;display:flex;align-items:center;justify-content:center;padding:16px;background:rgba(20,36,30,.6);backdrop-filter:blur(6px);animation:wc-fade .2s ease}
.pop-ov.pop-top{align-items:flex-start;padding-top:12vh}
.pop{position:relative;width:100%;max-width:440px;background:#fff;border-radius:26px;padding:26px;box-shadow:0 24px 70px rgba(20,36,30,.35);animation:wc-pop .25s ease;max-height:80vh;overflow:auto}
.pop-ov.pop-top .pop{max-width:560px}
.pop-age{text-align:center}
.pop-age p{color:var(--muted);margin:8px 0 18px}
.age-big{width:76px;height:76px;margin:0 auto 12px;border-radius:50%;border:4px solid var(--brand);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:26px}
.pop-h{margin:0 0 10px;font-size:22px;font-weight:800}
.pop-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.pop-x{position:absolute;right:14px;top:12px;width:34px;height:34px;border-radius:50%;border:0;background:var(--brand-soft);color:var(--accent);font-size:22px;line-height:1;cursor:pointer}
.pop-in{width:100%;padding:12px 16px;border:1.5px solid var(--line);border-radius:14px;font:inherit;font-size:16px;background:#fff;color:var(--ink)}
.pop-in:focus{outline:none;border-color:var(--brand)}
.res{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:6px}
.res-hint{color:var(--muted);padding:8px 4px}
.res-a{display:block;padding:10px 12px;border-radius:14px;color:var(--ink);background:var(--bg)}
.res-a:hover,.res-a:focus-visible{background:var(--brand-soft);text-decoration:none}
.res-a b{display:block;font-weight:800}
.res-a span{display:block;color:var(--muted);font-size:14px;line-height:1.4;margin-top:2px}
.toast{position:fixed;left:16px;bottom:16px;z-index:9500;max-width:340px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px 18px;box-shadow:0 16px 50px rgba(20,36,30,.22);animation:wc-pop .3s ease}
.toast p{margin:4px 0 12px;color:var(--muted);font-size:15px}
.toast .pop-actions{justify-content:flex-start}
@keyframes wc-fade{from{opacity:0}to{opacity:1}}
@keyframes wc-pop{from{opacity:0;transform:translateY(12px) scale(.97)}to{opacity:1;transform:none}}

/* filters */
.filterbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0 16px}
.fchips{display:flex;flex-wrap:wrap;gap:8px}
.fchip{font:700 14px var(--font);padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.fchip:hover{border-color:var(--brand);color:var(--accent)}
.fchip.on{background:var(--brand);border-color:var(--brand);color:#0B2A21}
.fsearch input{padding:9px 16px;border:1px solid var(--line);border-radius:999px;font:inherit;font-size:15px;background:var(--surface);color:var(--ink);min-width:200px}
.fsearch input:focus{outline:none;border-color:var(--brand)}
.fcount{margin:0 0 0 auto;color:var(--muted);font-size:14px}
.fempty{color:var(--muted)}
.cards>*:not([hidden]),.chips>*:not([hidden]){animation:wc-fade .3s ease}

/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0 6px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:16px 20px;display:flex;align-items:baseline;gap:12px}
.stat b{font-size:clamp(30px,4vw,44px);font-weight:800;letter-spacing:-.03em;color:var(--accent);line-height:1}
.stat span{color:var(--muted);font-weight:600}

@media(max-width:900px){.stats{grid-template-columns:1fr}.toc-panel{right:10px;left:10px;width:auto;top:auto;bottom:74px;transform:translateY(14px);max-height:50vh}.toc-panel.open{transform:none}}
@media(max-width:680px){.rail{right:10px;top:auto;bottom:14px;transform:none;flex-direction:column-reverse}.rb{width:42px;height:42px}.rb::after{display:none}.toast{left:10px;right:66px;bottom:12px;max-width:none}.fcount{margin-left:0;width:100%}.fsearch input{min-width:0;width:100%}.fsearch{flex:1 1 100%}}
@media(prefers-reduced-motion:reduce){.bg-fx i,.pop-ov,.pop,.toast,.cards>*,.chips>*{animation:none!important}html.js .reveal{opacity:1!important;transform:none!important;transition:none!important}.article-content h2::after{transform:scaleX(1);transition:none}.term::after,.rb,.toc-panel{transition:none}}

/* mobile: tooltips fixed to the screen so hidden bubbles never widen the page */
@media(max-width:680px){.term::after{position:fixed;left:12px;right:12px;top:auto;bottom:84px;transform:none!important;width:auto;max-width:none}}