:root{
  --bg:#faf8f5;--surface:#fff;--surface2:#f1eee9;--text:#1b1726;--muted:#6b6478;--line:#e6e1da;
  --accent:#6d4aff;--accent-soft:#eee9ff;--accent-ink:#fff;--ok:#1f8f4e;--ok-soft:#e3f5ea;--warn:#a8650d;--danger:#c9302c;
  --mac:#6e40c9;--server:#0969da;--phone:#bf3989;--browser:#1a7f37;
  --code-bg:#17141f;--code-ink:#ece8f5;--radius:14px;--rail:248px;--insp:300px;
  font-family:ui-sans-serif,-apple-system,"SF Pro Text",Inter,Segoe UI,Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#121017;--surface:#1a1722;--surface2:#231f2d;--text:#eee9f6;--muted:#a097b3;--line:#2e2938;
  --accent:#9d85ff;--accent-soft:#2a2340;--accent-ink:#121017;--ok:#4cc77f;--ok-soft:#173424;--code-bg:#0b0a0f;}}
:root[data-theme="dark"]{
  --bg:#121017;--surface:#1a1722;--surface2:#231f2d;--text:#eee9f6;--muted:#a097b3;--line:#2e2938;
  --accent:#9d85ff;--accent-soft:#2a2340;--accent-ink:#121017;--ok:#4cc77f;--ok-soft:#173424;--code-bg:#0b0a0f;}
*{box-sizing:border-box}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--accent-ink);padding:8px 12px;border-radius:8px;z-index:50}.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.spacer{flex:1}.muted{color:var(--muted)}.row{display:flex;align-items:center;flex-wrap:wrap}.gap{gap:10px}
/* shell */
.shell{display:grid;grid-template-columns:var(--rail) minmax(0,1fr) var(--insp);grid-template-rows:1fr;min-height:100vh}
.shell.no-inspector{grid-template-columns:var(--rail) minmax(0,1fr)}
.shell.no-inspector .inspector{display:none}
.topbar{display:none}
.rail{background:var(--surface);border-right:1px solid var(--line);padding:18px 12px 16px;position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:17px;padding:4px 8px 14px;letter-spacing:-.01em}
.brand img{width:36px;height:36px}
.rail h3{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:14px 10px 6px;font-weight:700}
.rail a.item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;text-decoration:none;color:var(--text);font-size:14px;font-weight:500}
.rail a.item:hover{background:var(--surface2)}
.rail a.item.active{background:var(--accent-soft);color:var(--text)}
.rail a.item img{width:28px;height:28px;flex:none}
.rail a.item .t{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rail a.item.soon{opacity:.55;pointer-events:none}
.badge{font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border-radius:99px;background:var(--surface2);color:var(--muted)}
.ring{width:26px;height:26px;flex:none}
.ring circle{fill:none;stroke-width:3}
.ring .bg{stroke:var(--line)}.ring .fg{stroke:var(--ok);stroke-linecap:round;transition:stroke-dashoffset .4s}
.rail .foot{margin-top:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding-top:12px;border-top:1px solid var(--line)}
.icon-btn{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;height:38px;min-width:38px;cursor:pointer;font-size:16px;display:inline-grid;place-items:center}
.icon-btn:hover{background:var(--surface2)}
.icon-btn.on{background:var(--accent-soft);border-color:var(--accent)}
.canvas{padding:30px 36px 100px;max-width:900px;width:100%;margin:0 auto;min-width:0}
.inspector{background:var(--surface);border-left:1px solid var(--line);padding:22px 18px;position:sticky;top:0;height:100vh;overflow-y:auto}
.inspector h4{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:18px 0 8px;font-weight:700}
.inspector h4:first-child{margin-top:0}
.prereq{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}
.prereq:last-child{border-bottom:0}
.prereq .st{width:22px;height:22px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:12px;border:1.5px solid var(--line);color:var(--ok-ink)}
.prereq .st.ok{background:var(--ok);border-color:var(--ok)}
.prereq .req{font-size:11px;color:var(--muted)}
.prereq label{display:flex;gap:6px;align-items:center;font-size:12px;color:var(--muted);cursor:pointer;margin-top:4px}
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:15}
/* type */
h1{font-size:30px;line-height:1.15;margin:0 0 6px;letter-spacing:-.015em}
h2{font-size:21px;margin:28px 0 10px;letter-spacing:-.01em}
h3{font-size:16px;margin:20px 0 8px}
p,li,td{overflow-wrap:anywhere}
.crumbs{color:var(--muted);font-size:13px;margin-bottom:6px}
.meta{color:var(--muted);font-size:14px;margin-bottom:18px;display:flex;gap:14px;flex-wrap:wrap}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin:14px 0;min-width:0}
.card.goal{border-left:4px solid var(--accent)}.card.why{background:var(--surface2)}.card.check{border-left:4px solid var(--ok)}.card.breaks{border-left:4px solid var(--warn)}
.callout{border:1px solid var(--line);border-left:4px solid var(--warn);padding:12px 16px;border-radius:10px;background:var(--surface);margin:14px 0}
/* home */
.hero{display:flex;gap:22px;align-items:center;padding:6px 0 18px}
.hero img{width:92px;height:92px;flex:none}
.hero p.lead{font-size:18px;color:var(--muted);margin:4px 0 12px;max-width:600px}
.overall{height:10px;background:var(--surface2);border-radius:99px;overflow:hidden;margin:6px 0 4px}
.overall span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--ok));transition:width .4s}
.packs{display:grid;gap:12px;margin:16px 0}
.pack{display:grid;grid-template-columns:64px 1fr auto;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;text-decoration:none;color:var(--text)}
.pack:hover{border-color:var(--accent)}
.pack img{width:64px;height:64px}
.pack h3{margin:0 0 2px;font-size:17px}
.pack .bar{height:6px;background:var(--surface2);border-radius:99px;overflow:hidden;margin-top:10px;max-width:280px}
.pack .bar span{display:block;height:100%;background:var(--ok)}
.pack.soon{opacity:.6;pointer-events:none;background:transparent;border-style:dashed}
/* trail */
.course-head{display:flex;gap:18px;align-items:center;margin-bottom:10px}
.course-head img{width:72px;height:72px}
.trail{position:relative;margin:28px 0 0;padding:10px 0 20px}
.trail::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:6px;margin-left:-3px;border-radius:3px;background:var(--line)}
.trail .fill{position:absolute;left:50%;top:0;width:6px;margin-left:-3px;border-radius:3px;background:var(--ok);transition:height .5s}
.landmark{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center;margin:22px 0 10px;z-index:1}
.landmark img{width:76px;height:76px;filter:drop-shadow(0 8px 16px rgba(0,0,0,.12))}
.landmark .lm{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:8px 14px;margin-top:6px}
.landmark .lm b{display:block;font-size:15px}.landmark .lm small{color:var(--muted);font-size:12px}
.landmark.done img{filter:drop-shadow(0 8px 16px rgba(31,143,78,.25))}
.landmark.future img{filter:grayscale(.6) opacity(.55)}
.node-row{position:relative;height:84px;z-index:1}
.node{position:absolute;top:10px;left:50%;width:56px;height:56px;margin-left:-28px;border-radius:50%;display:grid;place-items:center;text-decoration:none;font-weight:800;font-size:15px;border:3px solid var(--line);background:var(--surface);color:var(--muted);transition:transform .2s}
.node:hover{transform:scale(1.06)}
.node.done{background:var(--ok);border-color:var(--ok);color:var(--ok-ink)}
.node.current{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);box-shadow:0 0 0 8px var(--accent-soft);animation:pulse 1.8s ease-in-out infinite}
.node.future{opacity:.7}
.node.quiz{border-radius:16px;transform:rotate(45deg)}.node.quiz span{transform:rotate(-45deg)}
.node.quiz:hover{transform:rotate(45deg) scale(1.06)}
.node-row.l .node{margin-left:-28px;transform:translateX(-90px)}.node-row.r .node{margin-left:-28px;transform:translateX(90px)}
.node-row.l .node:hover{transform:translateX(-90px) scale(1.06)}.node-row.r .node:hover{transform:translateX(90px) scale(1.06)}
.node-row.l .node.quiz{transform:translateX(-90px) rotate(45deg)}.node-row.r .node.quiz{transform:translateX(90px) rotate(45deg)}
.node-label{position:absolute;top:22px;font-size:13px;color:var(--muted);max-width:220px;line-height:1.3}
.node-row.l .node-label{left:50%;margin-left:-50px}.node-row.r .node-label{right:50%;margin-right:-50px;text-align:right}
/* the character that walks the trail; app.js positions it beside the current node */
.hero-char{position:absolute;left:0;top:0;width:52px;height:65px;z-index:3;pointer-events:none}
.hero-char svg{width:100%;height:100%;overflow:visible;display:block}
.hero-char.flip svg{transform:scaleX(-1)}
.c-body,.c-foot{transform-box:fill-box;transform-origin:50% 100%}
.c-body{animation:c-bob 1.6s ease-in-out infinite}
.c-fl{animation:c-step 1.6s ease-in-out infinite}.c-fr{animation:c-step 1.6s ease-in-out -.8s infinite}
.c-glow{animation:c-glow 1.8s ease-in-out infinite}
.walking .c-body{animation:c-stride .36s ease-in-out infinite}
.walking .c-fl{animation:c-walk .36s ease-in-out infinite}.walking .c-fr{animation:c-walk .36s ease-in-out -.18s infinite}
:root[data-motion="off"] .hero-char *{animation:none}
@keyframes c-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-1.5px)}}
@keyframes c-step{0%,100%{transform:translateY(0)}50%{transform:translateY(-.8px)}}
@keyframes c-stride{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-2px) rotate(3deg)}}
@keyframes c-walk{0%,100%{transform:translate(-2px,0)}50%{transform:translate(2px,-4px)}}
@keyframes c-glow{50%{opacity:.5}}
/* the trail as a game board, in every theme but Classic */
:root[data-game] .trail{background:color-mix(in srgb,var(--surface) 72%,transparent);border:2px solid var(--line);border-radius:26px;padding:22px 0 30px;box-shadow:0 6px 0 var(--edge)}
:root[data-game] .trail::before{top:26px;bottom:26px;width:14px;margin-left:-7px;border-radius:7px;background:repeating-linear-gradient(180deg,var(--line) 0 14px,transparent 14px 22px)}
:root[data-game] .trail .fill{top:26px;width:14px;margin-left:-7px;border-radius:7px;max-height:calc(100% - 52px);background:repeating-linear-gradient(180deg,var(--ok) 0 14px,color-mix(in srgb,var(--ok) 55%,transparent) 14px 22px)}
:root[data-game] .node-label{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:3px 8px;top:18px;z-index:1}
:root[data-game] .node{border-width:3px;box-shadow:0 6px 0 var(--edge)}
:root[data-game] .node.done{box-shadow:0 6px 0 color-mix(in srgb,var(--ok) 60%,#000)}
:root[data-game] .node.current{animation:pulse-game 1.8s ease-in-out infinite}
@keyframes pulse-game{0%,100%{box-shadow:0 6px 0 color-mix(in srgb,var(--accent) 60%,#000),0 0 0 6px var(--accent-soft)}50%{box-shadow:0 6px 0 color-mix(in srgb,var(--accent) 60%,#000),0 0 0 13px var(--accent-soft)}}
/* mode switch and the style picker */
.modes{display:inline-flex;border:2px solid var(--line);border-radius:99px;padding:3px;background:var(--surface);gap:2px}
.modes button{border:0;background:transparent;color:var(--muted);font:inherit;font-size:14px;font-weight:700;padding:6px 14px;border-radius:99px;cursor:pointer}
.modes button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.pick{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0 6px}
.pick.three{grid-template-columns:repeat(3,1fr)}
.pick button{display:flex;gap:10px;align-items:center;text-align:left;border:2px solid var(--line);background:var(--bg);color:var(--text);border-radius:14px;padding:10px 12px;cursor:pointer;font:inherit;min-width:0}
.pick button[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.pick button b{display:block;font-size:14px}.pick button small{display:block;color:var(--muted);font-size:12px;line-height:1.3}
.pick .who{width:40px;height:50px;flex:none}.pick .who svg{width:100%;height:100%;overflow:visible}
.pick .sw{width:34px;height:34px;border-radius:10px;flex:none;border:2px solid rgba(128,128,128,.35);position:relative;overflow:hidden}
.pick .sw i{position:absolute;bottom:4px;width:10px;height:10px;border-radius:50%}.pick .sw i:first-child{left:4px}.pick .sw i:last-child{right:4px}
.dialog h3{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:16px 0 4px}
@media (max-width:560px){.pick,.pick.three{grid-template-columns:1fr}}
.finish{position:relative;z-index:1;text-align:center;padding:26px 0 0}
.finish img.line{width:140px;height:140px}
.finish img.cup{width:110px;height:110px;display:block;margin:-20px auto 0}
.finish.locked img{filter:grayscale(.8) opacity(.45)}
@keyframes pulse{0%,100%{box-shadow:0 0 0 6px var(--accent-soft)}50%{box-shadow:0 0 0 12px var(--accent-soft)}}
.bounce{animation:bounce .9s cubic-bezier(.3,1.6,.5,1) 1}
@keyframes bounce{0%{transform:scale(1)}30%{transform:scale(1.25) rotate(-6deg)}60%{transform:scale(.95) rotate(4deg)}100%{transform:scale(1)}}
.jump{margin:10px 0 0;font-size:14px}.jump summary{cursor:pointer;color:var(--muted)}
.jump ol{columns:2;margin:8px 0 0 18px;padding:0}
@media (max-width:640px){.jump ol{columns:1}}
/* lesson */
.minimap{display:flex;gap:6px;align-items:center;margin:0 0 14px;flex-wrap:wrap}
.minimap a{width:12px;height:12px;border-radius:50%;background:var(--line);display:block}
.minimap a.done{background:var(--ok)}.minimap a.current{background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.minimap .lbl{font-size:12px;color:var(--muted);margin-left:6px}
.step{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;margin:18px 0}
.step>div{min-width:0}
.step .num{width:28px;height:28px;border-radius:50%;background:var(--surface2);display:grid;place-items:center;font-weight:700;font-size:13px;margin-top:2px}
.step p{margin:0 0 8px}
.pill{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.06em;padding:2px 8px;border-radius:99px;color:#fff;margin-right:6px;vertical-align:middle}
.pill.mac{background:var(--mac)}.pill.server{background:var(--server)}.pill.phone{background:var(--phone)}.pill.browser{background:var(--browser)}
.codewrap{position:relative;margin:8px 0 4px}
pre{margin:0;background:var(--code-bg);color:var(--code-ink);padding:14px 76px 14px 16px;border-radius:12px;overflow-x:auto;font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere}
pre.cmd{white-space:pre}
pre .ph{color:#ffb86b;background:rgba(255,184,107,.14);border-radius:4px;padding:0 3px}
pre .ph.filled{color:#8ef0a1;background:rgba(142,240,161,.12)}
pre .cm{color:#8f8aa3}
.copy{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:8px;font-size:12px;padding:5px 10px;cursor:pointer}
.copy:hover{background:rgba(255,255,255,.22)}
code{font:0.92em ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface2);padding:1px 5px;border-radius:5px}
pre code{background:none;padding:0;font:inherit}
.kbd{font:12px ui-monospace,monospace;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 6px;background:var(--surface)}
.checkbox{display:flex;align-items:flex-start;gap:12px;cursor:pointer;font-size:16px}
.checkbox input{width:22px;height:22px;margin-top:2px;accent-color:var(--ok)}
.navrow{display:flex;justify-content:space-between;gap:12px;margin-top:34px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:var(--surface);color:var(--text);padding:10px 16px;border-radius:12px;cursor:pointer;font-size:15px;text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-weight:500}
.btn:hover{background:var(--surface2)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{background:transparent}.btn.danger{color:var(--danger)}
.guide-btn{border-color:var(--accent);background:var(--accent-soft)}
.guide-row{display:flex;gap:10px;align-items:center;margin:-4px 0 8px;flex-wrap:wrap}
.guide-row .muted{font-size:13px}
/* terminal shots */
.shot{background:#1d1a26;border-radius:12px;overflow:hidden;margin:12px 0;border:1px solid #2e2938;color:#ece8f5}
.shot .bar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:#2a2635;font-size:12px;color:#a097b3}
.shot .bar i{width:10px;height:10px;border-radius:50%;background:#ff5f57;display:inline-block}.shot .bar i:nth-child(2){background:#febc2e}.shot .bar i:nth-child(3){background:#28c840}
.shot .bar span{margin-left:8px}
.shot pre{background:transparent;border-radius:0;padding:12px 16px;white-space:pre-wrap}
.shot .ln{display:block;position:relative;padding-right:30px}
.shot .ln.dim{color:#9b94ad}.shot .ln.ok{color:#8ef0a1}.shot .ln.err{color:#ff8a80}
.shot .co{position:absolute;right:0;top:1px;width:20px;height:20px;border-radius:50%;background:var(--accent);color:#fff;font:700 11px/20px sans-serif;text-align:center}
.shot .notes{padding:8px 16px 12px;font-size:13px;color:#cfc8de;border-top:1px dashed #2e2938}
.shot .notes div{display:flex;gap:8px;margin:4px 0}
.shot .notes b{width:20px;height:20px;border-radius:50%;background:var(--accent);color:#fff;font:700 11px/20px sans-serif;text-align:center;flex:none}
/* quiz */
.quiz .q{margin:18px 0}
.quiz .opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:12px;margin:6px 0;cursor:pointer;background:var(--surface)}
.quiz .opt input{margin-top:4px;accent-color:var(--accent)}
.quiz .opt.right{border-color:var(--ok);background:var(--ok-soft)}
.quiz .opt.wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 8%,var(--surface))}
.quiz .fb{font-size:14px;margin:6px 2px;color:var(--muted)}
.score{font-size:18px;font-weight:700}
table{border-collapse:collapse;width:100%;font-size:14px;margin:10px 0}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.05em}
/* certificate */
.cert{background:linear-gradient(135deg,var(--accent-soft),var(--surface));border:1px solid var(--line);border-radius:20px;padding:28px;margin:18px 0;text-align:center}
.cert img{width:120px;height:120px}
.cert ul{text-align:left;margin:10px auto 0;max-width:560px;padding-left:20px}
/* dialogs, toast, fx */
.dialog{border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);padding:22px;max-width:620px;width:calc(100% - 32px)}
.dialog.wide{max-width:720px}
.dialog::backdrop{background:rgba(0,0,0,.45)}
.dialog h2{margin:0 0 4px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0 18px}
.field{margin:10px 0}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text);font:inherit}
.toast{position:fixed;bottom:18px;left:50%;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:all .25s;z-index:60}
.toast.show{opacity:1;transform:translate(-50%,0)}
.spark{position:fixed;width:8px;height:8px;border-radius:50%;background:hsl(var(--h) 90% 60%);pointer-events:none;z-index:70;animation:spark .7s ease-out forwards}
@keyframes spark{to{transform:translate(var(--dx),var(--dy)) scale(0);opacity:0}}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:65}
/* responsive */
@media (max-width:1180px){
  .shell,.shell.no-inspector{grid-template-columns:var(--rail) minmax(0,1fr)}
  .inspector{position:fixed;right:0;top:0;width:min(340px,90vw);transform:translateX(105%);transition:transform .25s;z-index:16;box-shadow:0 10px 40px rgba(0,0,0,.25)}
  .inspector.open{transform:none}
  .topbar{display:flex;align-items:center;gap:10px;grid-column:1/-1;position:sticky;top:0;z-index:20;padding:10px 14px;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .topbar #menuBtn{display:none}
  .shell{grid-template-rows:auto 1fr}
  .brand-sm{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);font-weight:700}
}
@media (max-width:860px){
  .shell,.shell.no-inspector{grid-template-columns:1fr}
  .topbar #menuBtn{display:inline-grid}
  .rail{position:fixed;left:0;top:0;height:100vh;width:min(300px,86vw);transform:translateX(-105%);transition:transform .25s;z-index:17;box-shadow:0 10px 40px rgba(0,0,0,.25)}
  .rail.open{transform:none}
  .canvas{padding:18px 16px 90px}
  h1{font-size:24px}
  .hero{flex-direction:column;align-items:flex-start}
  .pack{grid-template-columns:48px 1fr}.pack img{width:48px;height:48px}.pack .cta{display:none}
  .node-row.l .node,.node-row.r .node{transform:translateX(0)}
  .node-row.l .node:hover,.node-row.r .node:hover{transform:scale(1.06)}
  .node-row.l .node.quiz,.node-row.r .node.quiz{transform:rotate(45deg)}
  .node-label{display:none}
  .grid2{grid-template-columns:1fr}
}