:root{color-scheme:dark;--bg:#101214;--panel:#191c20;--panel2:#202429;--line:#34393e;--text:#f1f2ec;--muted:#abb2b9;--accent:#d4f58b;--orange:#edb879;--max:1320px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 'Segoe UI',Arial,sans-serif}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button,input,select{color:var(--text);border:1px solid var(--line);border-radius:6px;background:var(--panel2)}button{padding:10px 17px}button:hover{border-color:var(--accent)}input,select{width:100%;padding:12px}input[type=radio]{width:auto;accent-color:var(--accent)}label{display:block;font-size:14px;color:var(--muted)}input{margin-top:6px}input:invalid{border-color:#d68e85}h1,h2,h3{font-weight:500;line-height:1.12;letter-spacing:-.035em;margin-top:0}h1{font-size:clamp(2.5rem,5.1vw,4.5rem);max-width:1000px;margin-bottom:24px}h2{font-size:clamp(1.7rem,2.7vw,2.5rem)}h3{font-size:1.35rem;letter-spacing:-.02em}p{margin:0 0 1.25rem}small,.small{font-size:13px;color:var(--muted)}.muted{color:var(--muted)}.accent{color:var(--accent)}.eyebrow{font:600 12px/1.5 'Segoe UI',sans-serif;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin-bottom:20px}.skip{position:fixed;top:-200px;background:var(--accent);color:var(--bg);padding:12px;z-index:30}.skip:focus{top:10px}.top{border-bottom:1px solid var(--line);background:#101214f5;position:sticky;top:0;z-index:10}.top-inner{max-width:var(--max);margin:auto;display:flex;align-items:center;gap:35px;padding:19px 30px;min-height:80px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:20px;font-weight:650;white-space:nowrap;letter-spacing:-.7px}.brand span{font-weight:350}.mark{display:grid;place-items:center;border:1px solid var(--accent);width:33px;height:36px;font:700 23px/1 monospace;color:var(--accent);border-radius:3px}.desktop-nav{display:flex;align-items:center;gap:24px;margin-left:auto}.desktop-nav a{text-decoration:none;color:var(--muted);font-size:14px}.desktop-nav a:hover,.desktop-nav a[aria-current=page]{color:var(--accent)}.lang{display:flex;gap:3px;font-size:13px;align-items:center}.lang a{text-decoration:none;padding:5px 7px}.lang a[aria-current=page]{background:var(--panel2);color:var(--accent);border-radius:3px}.mobile-menu{display:none}.wrap{max-width:var(--max);margin:auto;padding:0 30px}.breadcrumb{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted);padding:26px 0}.breadcrumb a{text-decoration:none}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:65px;align-items:center;padding:68px 0 60px}.hero h1{font-size:clamp(3rem,5.4vw,5rem)}.hero h1 span{display:block;color:var(--accent)}.lead{font-size:18px;color:var(--muted);max-width:680px;line-height:1.65}.actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:30px}.button{display:inline-block;border:1px solid var(--line);padding:12px 20px;border-radius:5px;text-decoration:none;font-weight:500;font-size:14px;line-height:1.6}.button.primary{background:var(--accent);color:#151b0f;border-color:var(--accent)}.button:hover{border-color:var(--accent)}.micro{margin-top:24px;font-size:13px;color:var(--muted)}.diagram{background:linear-gradient(135deg,#20251d,#171b1e);border:1px solid #46503c;border-radius:8px;padding:27px;position:relative}.diagram-head{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #424b3e;padding-bottom:16px;margin-bottom:22px;font-size:12px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}.chain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:33px 0}.chain-box{border:1px solid #71815a;border-radius:4px;padding:17px 10px;position:relative;background:#222b1e;min-width:0}.chain-box:not(:last-child):after{content:'';width:19px;height:1px;background:#71815a;position:absolute;right:-19px;top:50%}.chain-box small{font:12px monospace}.chain-box strong{display:block;font-weight:500;color:var(--accent);font-size:16px;margin:10px 0}.hash-line{height:3px;background:#455439;margin:7px 0;width:85%}.hash-line:nth-child(even){width:63%}.diagram-foot{display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:13px;color:var(--muted)}.diagram-foot a{color:var(--accent)}.trustbar{display:flex;justify-content:space-between;gap:20px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}.trustbar b{font-weight:500;color:var(--text);margin-right:7px}.section{padding:56px 0 12px}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:24px}.section-head h2{margin:0}.section-head a{font-size:14px;color:var(--muted);text-decoration:none}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:7px;padding:25px;text-decoration:none;display:flex;flex-direction:column;min-width:0;transition:border-color .15s,transform .15s}.card:hover{border-color:#768364;transform:translateY(-2px)}.card .eyebrow{margin-bottom:24px}.card h3{margin-bottom:12px}.card p{font-size:14px;line-height:1.65;color:var(--muted);margin-bottom:22px}.card-foot{font-size:13px;color:var(--muted);margin-top:auto;display:flex;justify-content:space-between;gap:10px}.coin{font:500 26px/1 monospace;color:var(--accent);display:grid;place-items:center;width:46px;height:46px;border:1px solid #515b43;border-radius:50%;margin-bottom:30px}.card[data-asset=bitcoin] .coin{color:var(--orange);border-color:#776047}.editorial-band{display:grid;grid-template-columns:1fr 1fr;gap:50px;background:var(--panel);border:1px solid var(--line);padding:38px;border-radius:8px}.numbered{list-style:none;counter-reset:n;padding:0;margin:0}.numbered li{counter-increment:n;border-bottom:1px solid var(--line);padding:13px 0;display:flex;gap:20px}.numbered li:before{content:'0' counter(n);font:14px monospace;color:var(--accent)}.numbered a{text-decoration:none;font-size:16px}.support-band{display:flex;justify-content:space-between;gap:30px;align-items:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 0;margin-top:60px}.support-band p{color:var(--muted);max-width:680px;margin:8px 0 0}.support-band h2{font-size:24px;margin:0}.footer{padding:45px 0 25px;color:var(--muted);font-size:13px}.footer-top{display:flex;gap:35px;justify-content:space-between}.footer-links{display:flex;gap:24px;flex-wrap:wrap;max-width:690px}.footer-links a{text-decoration:none}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;margin-top:30px;display:flex;justify-content:space-between;gap:20px}.page-head{padding:26px 0 35px;max-width:1000px}.page-head h1{font-size:clamp(2.5rem,4.5vw,4rem)}.pill{display:inline-block;border:1px solid var(--line);border-radius:4px;padding:3px 9px;font-size:12px;color:var(--muted)}.meta{display:flex;align-items:center;gap:13px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.article-layout{display:grid;grid-template-columns:220px minmax(0,760px);gap:65px;justify-content:center;padding-top:18px}.toc{position:sticky;top:110px;align-self:start;font-size:14px}.toc a{display:block;text-decoration:none;padding:7px 0;color:var(--muted)}.toc a:hover{color:var(--accent)}.reading{min-width:0}.reading p{font-size:17px;line-height:1.85;color:#d0d4d5}.reading section{margin-bottom:40px;scroll-margin-top:110px}.reading h2{font-size:28px}.takeaway{border-left:3px solid var(--accent);padding:22px 25px;background:var(--panel);margin-bottom:40px}.takeaway .eyebrow{color:var(--accent);margin-bottom:10px}.takeaway p{font-size:16px;margin:0}.sources a{overflow-wrap:anywhere;font-size:14px}.sources li{padding:6px 0;color:var(--muted)}.sources ul{padding-left:20px}.reading .grid{grid-template-columns:1fr 1fr}.reading .card p{font-size:14px}.reading details{border-top:1px solid var(--line);padding:15px 0}.reading summary{cursor:pointer}.lab{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:30px;margin:24px 0}.lab h2{font-size:26px}.lab p{font-size:14px;color:var(--muted)}.fields{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:25px}.result{border-top:1px solid var(--line);padding-top:23px;color:var(--accent);font-size:28px;font-weight:500;overflow-wrap:anywhere}.formula{font:14px/1.7 monospace;color:var(--muted);background:#121517;padding:14px;border-radius:4px;overflow-wrap:anywhere;margin-top:16px}.steps{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.steps button{font-size:14px;padding:10px 12px}.steps button[aria-pressed=true]{background:var(--accent);color:#1a2113;border-color:var(--accent)}.stage{border:1px solid var(--line);padding:24px;border-radius:5px;min-height:130px}.stage h3{color:var(--accent);font-size:23px}.stage p{margin:0;font-size:16px}.lab-actions{display:flex;gap:12px;align-items:center;margin-top:20px}.searchbar{display:grid;grid-template-columns:1fr 220px;gap:18px;padding:22px 0 30px}.searchbar input{margin:0}.no-results{padding:25px;border:1px solid var(--line);color:var(--muted)}[hidden]{display:none!important}.term-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}.term-list a{padding:22px 0;border-top:1px solid var(--line);text-decoration:none}.term-list h2{font-size:22px;color:var(--accent);margin-bottom:9px}.term-list p{color:var(--muted);font-size:15px;margin:0}.choice-row{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.choice-row label{padding:10px 15px;border:1px solid var(--line);border-radius:4px;color:var(--text);cursor:pointer}.choice-row label:has(input:checked){border-color:var(--accent);color:var(--accent)}.donation{max-width:680px}.notice{padding:15px 18px;border:1px solid #66604c;border-radius:4px;background:#24221a;color:#e9d8a6;font-size:14px;margin-top:18px}.quiz-options{display:grid;gap:10px}.quiz-options button{text-align:left}.quiz-feedback{margin-top:22px;min-height:50px;color:var(--accent);font-size:16px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:15px}th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--accent)}.hash{font:13px/1.8 monospace;overflow-wrap:anywhere;padding:15px;background:#101214;border:1px solid var(--line);margin-top:15px}.merkle{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;text-align:center;margin:20px 0}.merkle>div{border:1px solid #526141;background:#222a1d;padding:14px 4px;font:13px monospace;overflow-wrap:anywhere}.merkle .root{grid-column:span 4;color:var(--accent)}.merkle .pair{grid-column:span 2}.language-note{border-bottom:1px solid var(--line);padding:10px 30px;color:var(--muted);font-size:14px;text-align:center}.language-note a{color:var(--accent)}.language-note button{margin-left:14px;padding:2px 8px;font-size:13px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;margin-bottom:25px}.stats strong{display:block;color:var(--accent);font-size:20px;font-weight:500}.stats span{font-size:13px;color:var(--muted)}
@media(max-width:1100px){.desktop-nav{gap:15px}.top-inner{gap:22px}.hero{gap:30px}.grid.four{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:180px minmax(0,1fr);gap:35px}.hero h1{font-size:3.8rem}}@media(max-width:850px){.desktop-nav{display:none}.lang{margin-left:auto}.mobile-menu{display:block}.mobile-menu summary{cursor:pointer;font-size:14px;padding:9px}.mobile-menu nav{position:absolute;left:0;right:0;top:79px;background:var(--panel);padding:20px 30px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:16px}.mobile-menu a{text-decoration:none}.hero{grid-template-columns:1fr;padding-top:40px;gap:32px}.hero h1{font-size:3.6rem}.diagram{max-width:650px;width:100%}.grid{grid-template-columns:1fr 1fr}.editorial-band{grid-template-columns:1fr;gap:15px}.article-layout{display:block}.toc{position:static;display:flex;flex-wrap:wrap;gap:6px 20px;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:30px}.toc .eyebrow{width:100%;margin:0}.footer-top{flex-direction:column}.trustbar{flex-wrap:wrap}.reading{max-width:760px}.support-band{align-items:flex-start;flex-direction:column}}@media(max-width:540px){.wrap{padding:0 20px}.top-inner{padding:15px 20px;gap:8px}.brand{font-size:17px;gap:7px}.mark{width:28px;height:31px;font-size:21px}.mobile-menu summary{font-size:13px;padding:6px}.lang a{padding:5px}.hero h1{font-size:2.8rem}.hero{padding:35px 0}.lead{font-size:17px}.diagram{padding:20px}.chain{gap:10px}.chain-box{padding:13px 6px}.chain-box strong{font-size:14px}.chain-box:not(:last-child):after{width:11px;right:-11px}.diagram-head{font-size:11px}.diagram-foot{font-size:12px}.grid,.grid.four,.reading .grid{grid-template-columns:1fr}.card{padding:22px}.grid.four{grid-template-columns:1fr 1fr;gap:12px}.grid.four .card{padding:18px}.grid.four .card h3{font-size:20px}.grid.four .card p{font-size:13px}.coin{margin-bottom:22px}.section{padding-top:42px}.section-head{align-items:flex-start}.section-head a{font-size:13px}.editorial-band{padding:25px}.trustbar{font-size:13px;gap:10px 20px}.fields,.searchbar{grid-template-columns:1fr}.lab{padding:21px}.result{font-size:25px}.term-list{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.page-head{padding-top:14px}.page-head h1{font-size:2.5rem}.stats{gap:12px}.stats strong{font-size:17px}.stats span{font-size:12px}.reading p{font-size:16px}.button{padding:11px 16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}@media print{.top,.toc,.footer,.support-band,.lab-actions{display:none}body{background:#fff;color:#111}.reading p{color:#111}.article-layout{display:block}.wrap{max-width:none}.takeaway,.lab{background:none;color:#111;border-color:#999}a{color:#111}}

/* Official crypto artwork keeps its native palette; no brand tint or icon ring. */
.coin.crypto-logo{display:block;width:48px;height:48px;object-fit:contain;border:0;border-radius:0;background:transparent;filter:none;padding:0}.card[data-asset=bitcoin] .coin.crypto-logo{border:0}

/* Welcoming light palette and asset-specific learning contexts. */
:root{color-scheme:light;--bg:#f7f8fc;--panel:#fff;--panel2:#eef2f8;--line:#dbe2ec;--text:#202c40;--muted:#55647a;--accent:#32659d;--tint:#edf4fc;--orange:#a84e00}
[data-asset=bitcoin],[data-flow=bitcoin]{--accent:#a84e00;--tint:#fff3e3}
[data-asset=ethereum],[data-flow=rollup]{--accent:#535a94;--tint:#f0effb}
[data-asset=chainlink],[data-flow=oracle]{--accent:#0847d8;--tint:#eaf1ff}
[data-asset=aave],[data-flow=aave]{--accent:#6553b6;--tint:#f2edff}
[data-asset=arbitrum]{--accent:#17658e;--tint:#eaf6fc}
[data-asset=solana]{--accent:#7140aa;--tint:#f0eafa}
[data-asset=hyperliquid]{--accent:#146953;--tint:#e5f8ef}
body{background:linear-gradient(180deg,var(--tint) 0, var(--bg) 560px);min-height:100vh}
.top{background:#ffffffed;backdrop-filter:blur(14px)}
.mark{border-radius:9px;background:var(--tint)}
.button{border-radius:10px;background:var(--panel)}
.button.primary,.steps button[aria-pressed=true],.skip{background:var(--accent);color:#fff}
.diagram{background:linear-gradient(135deg,var(--tint),#fff);border-color:var(--line);border-radius:20px;box-shadow:0 16px 45px #25365b0a}
.diagram-head{border-color:var(--line)}
.chain-box{background:#fff;border-color:var(--accent);border-radius:9px}
.chain-box:not(:last-child):after,.hash-line{background:var(--accent);opacity:.3}
.card{border-radius:16px;box-shadow:0 5px 20px #25365b05}
.card[data-asset]:not([data-asset=""]){background:linear-gradient(145deg,var(--tint),#fff 85%);border-top:3px solid var(--accent)}
.card:hover{border-color:var(--accent);box-shadow:0 8px 24px #25365b0c}
.card[data-asset]:not([data-asset=""]) h3,.card[data-asset]:not([data-asset=""]) .eyebrow{color:var(--accent)}
.editorial-band,.lab{border-radius:16px}.editorial-band{background:linear-gradient(130deg,#fff,var(--tint))}
.reading p{color:#35445a}.takeaway{background:var(--tint);border-radius:0 12px 12px 0}
.formula,.hash{background:var(--panel2);color:#44546c;border-radius:8px}
.stage{background:var(--tint);border-radius:10px}
.notice{border-color:#e5cc94;background:#fff6df;color:#775213}
.merkle>div{border-color:var(--line);background:var(--tint)}
.pill{background:var(--tint);border-radius:20px}
.page-head h1{color:var(--accent)}
.footer{margin-top:54px}.footer-top{padding-top:26px;border-top:1px solid var(--line)}
@media print{body{background:#fff}.card,.diagram{box-shadow:none}.top{display:none}}

/* Joined wordmark: retain the existing typeface and weights. */
.brand .wordmark{font-weight:650;white-space:nowrap;color:#30363c}.brand .wordmark>span{font-weight:350}.brand .mark{color:#30363c;border-color:#30363c;background:#f0f1f2}

.search-scope{margin-top:24px;color:var(--muted)}.practice{background:var(--tint);padding:24px;border-radius:12px}.lesson-navigation{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:36px 0}.lesson-navigation span{display:block;font-size:14px;font-weight:400;margin-top:8px}.lang a,.mobile-menu summary{min-width:28px;min-height:28px}.reading summary{font-weight:600}.quiz-options button:disabled{opacity:.7;cursor:default}@media(max-width:540px){.lesson-navigation{grid-template-columns:1fr}}

.desktop-nav a,.lang,.breadcrumb,.card-foot,.small,.meta{font-size:14px}.desktop-nav{gap:18px}.formula{overflow-wrap:anywhere}.coin.crypto-logo{flex-shrink:0}.card[data-asset=hyperliquid] .crypto-logo{background:#123c35;border-radius:10px;padding:5px}.card[data-asset=arbitrum] .crypto-logo{height:52px}.quiz-feedback a{display:inline-block;padding:6px 0}@media(max-width:1100px){.desktop-nav{gap:12px}.desktop-nav a{font-size:13px}}
/* Learning paths and authored workshops */
.level-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:30px 0 36px}
.level-path{display:flex;flex-direction:column;padding:25px;border:1px solid var(--line,#dce3ec);border-top:4px solid var(--level-ink);border-radius:18px;background:var(--panel,#fff);color:var(--text);text-decoration:none;transition:transform .15s ease,box-shadow .15s ease}
.level-path:hover{transform:translateY(-3px);box-shadow:0 10px 28px #263c5010}.level-path h2{font-size:1.4rem;margin:20px 0 10px}.level-path p{font-size:.96rem;line-height:1.7;margin:0 0 22px;color:var(--muted)}.level-path strong{margin-top:auto;font-size:.85rem}
.level-0{--level-ink:#20654b;--level-bg:#e8f5ed}.level-1{--level-ink:#85510e;--level-bg:#fff3dc}.level-2{--level-ink:#65428e;--level-bg:#f2ebfa}
.level-badge{display:inline-flex;align-items:center;align-self:flex-start;gap:6px;padding:5px 10px;border-radius:7px;background:var(--level-bg);color:var(--level-ink);font-size:.77rem;font-weight:700;line-height:1.4;text-decoration:none;white-space:normal}
.learning-plan{padding:24px;background:var(--tint);border:1px solid var(--line,#dce3ec);border-radius:16px;margin:0 0 30px}.learning-plan h2{margin-top:12px!important;font-size:1.4rem}.learning-plan p{font-size:.95rem}.learning-plan p a{text-decoration:underline;text-underline-offset:3px}
.path-overview{max-width:760px;margin:35px 0}.path-overview p{color:var(--muted);line-height:1.75}
.lesson-diagram{margin:24px 0;padding:22px;border:1px solid var(--line,#dce3ec);border-radius:16px;background:var(--tint)}
.lesson-diagram ol{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;padding:0;margin:0;gap:12px}.lesson-diagram li{padding:16px 10px;background:var(--panel);border:1px solid var(--line,#dce3ec);border-radius:10px;min-width:0;text-align:center;position:relative}.lesson-diagram li:not(:last-child)::after{content:'';position:absolute;right:-13px;top:50%;width:12px;border-top:2px solid var(--accent)}.lesson-diagram li span{display:block;color:var(--accent);font-size:.8rem;margin-bottom:10px}.lesson-diagram li strong{font-size:.84rem;line-height:1.5;overflow-wrap:anywhere}.lesson-diagram figcaption{font-size:.81rem;color:var(--muted);line-height:1.6;margin-top:16px}
.workshop{background:var(--panel);border:1px solid var(--line,#dce3ec);border-left:4px solid var(--accent);border-radius:14px;padding:26px;margin:36px 0}.workshop h2{margin-top:12px!important}.workshop-tasks{padding-left:24px}.workshop-tasks li{padding-left:5px;margin:14px 0;line-height:1.8}.workshop-answer{margin-top:22px;padding:16px 18px;background:var(--tint);border-radius:10px}.workshop-answer summary{cursor:pointer;font-weight:650;line-height:1.6}.workshop-answer p:last-child{margin-bottom:0}
.video-lesson{padding:25px;border:1px solid var(--line,#dce3ec);border-radius:16px;margin:32px 0}.video-player{display:grid;place-items:center;aspect-ratio:16/9;background:var(--tint);border-radius:12px;overflow:hidden}.video-player iframe{width:100%;height:100%;border:0}.video-player button{margin:20px}.card-foot{gap:8px;flex-wrap:wrap}.toc a{line-height:1.4}.reading section{scroll-margin-top:100px}
@media(max-width:850px){.level-paths{grid-template-columns:1fr}.level-path{padding:22px}.level-path h2{margin-top:15px}.lesson-diagram ol{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-diagram li:nth-child(2)::after{display:none}}
@media(max-width:480px){.workshop,.learning-plan,.video-lesson{padding:18px}.lesson-diagram{padding:14px}.lesson-diagram li{padding:14px 8px}.card-foot{align-items:flex-start}.level-path h2{font-size:1.3rem}}
@media(prefers-reduced-motion:reduce){.level-path{transition:none}.level-path:hover{transform:none}}

.concept-svg{width:100%;height:auto;color:var(--accent);margin:8px 0 15px}.concept-svg rect{fill:var(--panel);stroke:var(--accent);stroke-width:1.5}.concept-svg text{fill:var(--text);font-size:14px;font-family:inherit}

/* Explicit day/night preference and accessible answer states. */
:root{--success:#17623a;--success-bg:#eaf7ef;--error:#a12732;--error-bg:#fff0f1}
.theme-select{width:auto;min-width:88px;flex-shrink:0;padding:8px 9px;min-height:42px;font-size:14px;border-radius:9px;background:var(--panel2);color:var(--text)}
.top-inner{gap:18px}.lesson-qcm{margin:24px 0 0}.lesson-qcm fieldset{border:0;padding:0;margin:0;min-width:0}.lesson-qcm legend{font-size:17px;font-weight:650;line-height:1.7;margin-bottom:12px;padding:0;width:100%}.qcm-options{display:grid;gap:12px}.qcm-options button{display:flex;gap:13px;align-items:flex-start;text-align:left;line-height:1.65;font-size:16px;padding:15px 17px;background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:10px}.answer-letter{flex:0 0 27px;text-align:center;font-size:14px;font-weight:700;background:var(--panel2);border-radius:5px;padding:1px 3px}.qcm-options button:hover:not(:disabled){border-color:var(--accent);background:var(--tint)}.qcm-options button:disabled{opacity:1;cursor:default}.qcm-feedback:empty{display:none}.qcm-feedback{margin:20px 0 15px;padding:12px 16px;border-radius:9px;font-size:19px;font-weight:700;border:1px solid currentColor}.qcm-feedback[data-result=correct],.quiz-feedback[data-result=correct]{color:var(--success);background:var(--success-bg)}.qcm-feedback[data-result=wrong],.quiz-feedback[data-result=wrong]{color:var(--error);background:var(--error-bg)}.quiz-feedback[data-result]{padding:14px 18px;border:1px solid currentColor;border-radius:10px}.qcm-options .answer-correct,.quiz-options .answer-correct{background:var(--success-bg);border:2px solid var(--success);color:var(--success);opacity:1}.qcm-options .answer-wrong,.quiz-options .answer-wrong{background:var(--error-bg);border:2px solid var(--error);color:var(--error);opacity:1}.qcm-options button[aria-pressed=true]{box-shadow:inset 4px 0 currentColor}.qcm-explanation{padding:4px 0}.qcm-reset{margin-top:6px}
html[data-theme=dark]{color-scheme:dark;--bg:#111923;--panel:#1a2635;--panel2:#253448;--line:#3c4e63;--text:#eef3fa;--muted:#b7c5d7;--accent:#8fc4ff;--tint:#172a40;--orange:#ffb66b;--success:#8de5af;--success-bg:#163c2a;--error:#ffafb4;--error-bg:#47212a}
html[data-theme=dark] [data-asset=bitcoin],html[data-theme=dark] [data-flow=bitcoin]{--accent:#ffb66b;--tint:#322619}
html[data-theme=dark] [data-asset=ethereum],html[data-theme=dark] [data-flow=rollup]{--accent:#b7bdff;--tint:#242a43}
html[data-theme=dark] [data-asset=chainlink],html[data-theme=dark] [data-flow=oracle]{--accent:#91b6ff;--tint:#192c4c}
html[data-theme=dark] [data-asset=aave],html[data-theme=dark] [data-flow=aave]{--accent:#c6afff;--tint:#2c2444}
html[data-theme=dark] [data-asset=arbitrum]{--accent:#75cef4;--tint:#183044}
html[data-theme=dark] [data-asset=solana]{--accent:#c7a4ff;--tint:#2b2140}
html[data-theme=dark] [data-asset=hyperliquid]{--accent:#87e5c3;--tint:#17372e}
html[data-theme=dark] .top{background:#111923f2}
html[data-theme=dark] .brand .wordmark{color:#eef3fa}
html[data-theme=dark] .brand .mark{color:#eef3fa;border-color:#c5d0dd;background:#253448}
html[data-theme=dark] .reading p{color:#d6e0ec}
html[data-theme=dark] .diagram,html[data-theme=dark] .editorial-band{background:linear-gradient(135deg,var(--tint),var(--panel));box-shadow:none}
html[data-theme=dark] .chain-box{background:var(--panel)}
html[data-theme=dark] .card[data-asset]:not([data-asset=""]){background:linear-gradient(145deg,var(--tint),var(--panel) 85%)}
html[data-theme=dark] .button.primary,html[data-theme=dark] .steps button[aria-pressed=true],html[data-theme=dark] .skip{color:#101923}
html[data-theme=dark] .formula,html[data-theme=dark] .hash{color:#d6e0ec;background:var(--panel2)}
html[data-theme=dark] .notice{background:#3c301a;border-color:#827047;color:#ffe0a4}
html[data-theme=dark] .level-0{--level-ink:#a0e6bd;--level-bg:#1b3e30}
html[data-theme=dark] .level-1{--level-ink:#ffd394;--level-bg:#41331e}
html[data-theme=dark] .level-2{--level-ink:#d4b8ff;--level-bg:#36274c}
html[data-theme=dark] .coin.crypto-logo{background:#f7f8fc;border-radius:8px;padding:3px}
html[data-theme=dark] .card[data-asset=hyperliquid] .crypto-logo{background:#123c35}
@media(max-width:1120px){.desktop-nav{display:none}.lang{margin-left:auto}.mobile-menu{display:block}.mobile-menu summary{cursor:pointer;font-size:14px;padding:9px}.mobile-menu nav{position:absolute;left:0;right:0;top:100%;background:var(--panel);padding:20px 30px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:16px}.mobile-menu a{text-decoration:none}}
@media(max-width:540px){.top-inner{gap:6px;padding:14px 12px}.theme-select{min-width:74px;max-width:85px;padding:8px 5px}.mobile-menu summary{padding:5px}.lang a{padding:4px}.qcm-options button{padding:13px 12px}}
@media(max-width:359px){.top-inner{flex-wrap:wrap}.theme-select{margin-left:auto}.mobile-menu nav{top:100%}}
@media print{html[data-theme]{--bg:#fff;--panel:#fff;--panel2:#fff;--text:#111;--muted:#333;--line:#888;--tint:#fff}.theme-select{display:none}html[data-theme=dark] body{background:#fff}html[data-theme=dark] .reading p{color:#111}}

/* Keep section destinations clear of the responsive sticky header. */
:root{--header-offset:100px}
html{scroll-padding-top:0}
.reading section,[id="main"],.lab[id]{scroll-margin-top:var(--header-offset)}
@media(max-width:1120px){.mobile-menu nav{max-height:calc(100dvh - var(--header-offset));overflow-y:auto;overscroll-behavior:contain;gap:4px 12px}.mobile-menu nav a{display:flex;align-items:center;min-height:44px;padding:10px 12px;border-radius:6px}.mobile-menu nav a[aria-current=page]{background:var(--tint)}.lang a{display:inline-flex;align-items:center;justify-content:center;min-width:32px;min-height:44px}.mobile-menu summary{min-height:44px;display:flex;align-items:center}.toc a{min-height:44px;display:flex;align-items:center;padding:10px 6px}.footer-links a{display:inline-flex;align-items:center;min-height:44px}.breadcrumb{overflow-wrap:anywhere}.reading,.card,.lab{overflow-wrap:anywhere}}
@media(max-width:540px){.top-inner{display:grid;grid-template-columns:1fr auto;gap:4px 10px;padding:8px 12px}.top-inner>.brand{grid-column:1;grid-row:1}.top-inner>.lang{grid-column:2;grid-row:1;margin:0}.top-inner>.theme-select{grid-column:1;grid-row:2;margin:0;min-height:44px}.top-inner>.mobile-menu{grid-column:2;grid-row:2;justify-self:end}.toc{gap:4px 12px}.fields input,.searchbar input,.searchbar select{font-size:16px}}

.calculator .result{display:block;margin-top:24px;padding:22px;border:1px solid var(--line);background:var(--tint);border-radius:10px;scroll-margin-top:var(--header-offset)}.calculator-status{font-size:14px;color:var(--muted);margin:14px 0}.calculator button[type=submit]{min-height:48px;font-weight:600}.level-modules{scroll-margin-top:var(--header-offset)}.toc-wrap{position:sticky;top:var(--header-offset);align-self:start}.toc{position:static;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}.toc summary{cursor:pointer;font-size:15px;font-weight:600;padding:16px;min-height:52px}.toc-links{counter-reset:toc-item;padding:0 12px 12px}.toc-links a{counter-increment:toc-item;display:flex;gap:10px;align-items:center;min-height:44px;padding:10px 4px;border-top:1px solid var(--line);text-decoration:none;font-size:14px}.toc-links a:before{content:counter(toc-item,decimal-leading-zero);font-size:12px;color:var(--accent);flex-shrink:0}.toc-links a:hover,.toc-links a:focus-visible{color:var(--accent);background:var(--tint)}
@media(max-width:850px){.toc-wrap{position:static;margin:22px 0}.toc{display:block;margin:0;padding:0}.toc-links a{width:100%}.calculator button[type=submit]{width:100%}.level-modules>h2{font-size:1.6rem}}