:root{
  --bg:#f7f7f4;
  --paper:#ffffff;
  --white:#ffffff;
  --ink:#090909;
  --muted:#696969;
  --line:#d9d9d4;
  --soft:#ecece7;
  --blue:#1557ff;
  --blue-dark:#0b35a8;
  --blue-soft:#e8eeff;
  --yellow:#1557ff;
  --cream:#ffffff;
  --cream-2:#f7f7f4;
  --shadow:0 24px 80px rgba(0,0,0,.11);
  --sans:"Manrope","Segoe UI",system-ui,sans-serif;
  --display:"Manrope","Segoe UI",system-ui,sans-serif;
  --mono:"DM Mono","Cascadia Code",ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{
  background:
    radial-gradient(circle at 1px 1px, rgba(9,9,9,.09) 1px, transparent 1.4px) 0 0 / 26px 26px,
    var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.6;
}
body::before{
  content:"";
  position:fixed;
  z-index:20;
  inset:0;
  pointer-events:none;
  background:linear-gradient(rgba(255,255,255,0) 50%, rgba(0,0,0,.018) 50%);
  background-size:100% 4px;
  mix-blend-mode:multiply;
}
button,input{font:inherit}
a{color:inherit}
.topbar{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:72px;
  padding:12px clamp(14px,3vw,34px);
  background:rgba(247,247,244,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;letter-spacing:-.03em}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  font-family:var(--mono);
  font-size:12px;
  box-shadow:4px 4px 0 var(--blue);
}
.nav{display:flex;gap:20px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:0;border:1px solid var(--line);background:rgba(255,255,255,.72);cursor:pointer}
.nav-toggle span{display:block;margin:0 auto;width:20px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav a{
  text-decoration:none;
  padding:7px 0;
  border-radius:0;
  color:var(--muted);
  font-family:var(--mono);
  font-size:12px;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:.06em;
}
.nav a[aria-current="page"],.nav a:hover{color:var(--blue);background:transparent}
.roadmap-shell{padding:28px 0 70px}
.intro{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto 28px;
  padding-top:46px;
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:12px;
  margin:0 0 24px;
  color:var(--ink);
  font:500 12px/1 var(--mono);
  letter-spacing:.09em;
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:44px;height:3px;background:var(--blue)}
h1{
  margin:0;
  font-family:var(--display);
  font-size:clamp(54px,7.2vw,104px);
  line-height:.91;
  letter-spacing:-.075em;
}
.intro p:not(.eyebrow),.page-head p{max-width:720px;color:#3e3e3e;font-size:clamp(17px,2vw,21px);line-height:1.7}
.stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.stat{
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--paper);
  padding:10px 14px;
  font-family:var(--mono);
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.06em;
  box-shadow:4px 4px 0 var(--blue);
}
.stat b{font-size:18px;color:var(--ink)}
.learning-controls{
  margin-top:18px;
  display:grid;
  gap:12px;
}
.control-search{
  display:grid;
  gap:6px;
  max-width:540px;
  color:var(--muted);
  font-weight:800;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.08em;
}
.control-search input{
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--paper);
  color:var(--ink);
  padding:11px 12px;
  text-transform:none;
  letter-spacing:0;
  font-weight:500;
}
.filter-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.filter-chip{
  border:1px solid var(--ink);
  border-radius:999px;
  background:var(--paper);
  color:var(--ink);
  padding:7px 12px;
  font-weight:800;
  cursor:pointer;
}
.filter-chip.active,.filter-chip:hover{background:var(--ink);color:var(--white);box-shadow:4px 4px 0 var(--blue)}
.guided-panel{
  margin-top:18px;
  border:1px solid var(--ink);
  border-radius:0;
  background:rgba(255,255,255,.9);
  padding:20px;
  box-shadow:8px 8px 0 var(--blue);
}
.guided-panel h2{margin:0;font-size:28px;font-family:var(--display);letter-spacing:-.04em}
.guided-list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:8px;
}
.guided-list button{
  width:100%;
  min-height:54px;
  display:flex;
  align-items:center;
  gap:10px;
  border:1px solid var(--line);
  border-radius:0;
  background:var(--white);
  padding:9px;
  text-align:left;
  cursor:pointer;
}
.guided-list button:hover{border-color:var(--ink);box-shadow:5px 5px 0 var(--blue);transform:translateY(-3px)}
.guided-list span{
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  flex:none;
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  font-family:var(--mono);
  font-size:12px;
}
.map-viewport{
  width:100%;
  overflow-x:auto;
  padding:22px max(18px,calc((100vw - 1180px)/2)) 30px;
}
.roadmap{
  position:relative;
  width:min(1180px,100%);
  min-width:820px;
  margin:0 auto;
  padding:10px 0 30px;
}
.roadmap::before{
  content:"";
  position:absolute;
  left:50%;
  top:0;
  bottom:0;
  width:2px;
  background:var(--blue);
  transform:translateX(-50%);
}
.phase-row{
  position:relative;
  display:grid;
  grid-template-columns:1fr 260px 1fr;
  gap:34px;
  min-height:245px;
  align-items:start;
  padding:10px 0 32px;
}
.phase-row::after{
  content:"";
  position:absolute;
  left:calc(50% - 4px);
  top:72px;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--blue);
}
.milestone{
  position:relative;
  grid-column:2;
  justify-self:center;
  width:100%;
  text-align:center;
  z-index:2;
}
.phase-label{
  margin:0 auto 58px;
  color:var(--ink);
  font:800 17px/1.1 var(--display);
  letter-spacing:-.04em;
}
.milestone-btn,.topic-btn,.phase-pill{
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  min-height:44px;
  padding:9px 12px;
  font-weight:800;
  box-shadow:5px 5px 0 var(--blue);
  cursor:pointer;
}
.milestone-btn{width:100%}
.milestone-btn:hover,.topic-btn:hover{filter:none;transform:translate(-3px,-3px);box-shadow:8px 8px 0 var(--blue)}
.cluster{
  position:relative;
  border:1px solid var(--ink);
  border-radius:0;
  background:rgba(255,255,255,.88);
  padding:12px;
  z-index:2;
  box-shadow:6px 6px 0 rgba(21,87,255,.18);
}
.cluster.left{grid-column:1}
.cluster.right{grid-column:3}
.cluster::before{
  content:"";
  position:absolute;
  top:34px;
  width:34px;
  border-top:2px dotted var(--blue);
}
.cluster.left::before{right:-36px}
.cluster.right::before{left:-36px}
.cluster-title{
  text-align:center;
  font:500 12px/1.2 var(--mono);
  color:var(--blue);
  text-transform:uppercase;
  letter-spacing:.08em;
  margin:0 0 10px;
}
.topic-list{display:grid;gap:7px}
.topic-btn{
  width:100%;
  min-height:36px;
  background:var(--white);
  color:var(--ink);
  font-size:13px;
  box-shadow:none;
}
.badges{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  margin-bottom:5px;
}
.badges span{
  display:inline-flex;
  align-items:center;
  min-height:18px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(247,247,244,.9);
  color:var(--muted);
  padding:1px 6px;
  font:800 10px/1 var(--mono);
  text-transform:uppercase;
}
.milestone-btn .badges,.topic-btn .badges{justify-content:center}
.phase-checkpoint{
  margin-top:8px;
  border:1px dashed var(--ink);
  border-radius:0;
  background:var(--paper);
  padding:8px;
  text-align:left;
  font-size:12px;
}
.phase-checkpoint b{
  display:block;
  color:var(--blue);
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.08em;
  margin-bottom:3px;
}
.phase-checkpoint span{color:var(--muted)}
.topic-btn.core{background:var(--blue);color:var(--white)}
.topic-btn.done,.milestone-btn.done{background:var(--soft);color:var(--ink);box-shadow:5px 5px 0 var(--ink)}
.topic-btn.hidden,.phase-row.hidden,.topic-card.hidden,.glossary-card.hidden,.guided-list [data-topic].hidden{display:none}
.scrim{
  position:fixed;
  inset:0;
  background:rgba(10,12,18,.42);
  opacity:0;
  pointer-events:none;
  z-index:40;
}
.scrim.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;
  inset:0 0 0 auto;
  z-index:50;
  width:min(620px,100%);
  display:flex;
  flex-direction:column;
  background:
    radial-gradient(circle at 1px 1px, rgba(9,9,9,.06) 1px, transparent 1.4px) 0 0 / 26px 26px,
    var(--paper);
  border-left:1px solid var(--ink);
  box-shadow:var(--shadow);
  transform:translateX(104%);
  transition:transform .22s ease;
}
.drawer.open{transform:translateX(0)}
.drawer-head{position:relative;padding:24px 28px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.86)}
.icon-btn{
  position:absolute;
  top:14px;
  right:16px;
  width:36px;
  height:36px;
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  cursor:pointer;
  font-size:24px;
  line-height:1;
}
.crumbs{display:block;margin-bottom:8px;color:var(--blue);font:500 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.1em}
.drawer h2{margin:0 44px 12px 0;font:800 38px/1 var(--display);letter-spacing:-.06em}
.done-btn{
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  padding:8px 12px;
  font-weight:800;
  cursor:pointer;
  box-shadow:4px 4px 0 var(--blue);
}
.done-btn.done{background:var(--white);color:var(--ink);box-shadow:4px 4px 0 var(--ink)}
.drawer-body{overflow:auto;padding:8px 26px 60px}
.sec{border-bottom:1px solid var(--line);padding:19px 0}
.sec h3{margin:0 0 10px;color:var(--blue);font:500 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.1em}
.sec p{margin:0 0 10px}
.sec ul{margin:0;padding-left:20px}
.sec li{margin:0 0 7px}
.layman{background:var(--white);border:1px solid var(--ink);border-left:8px solid var(--blue);padding:14px 16px;border-radius:0;box-shadow:5px 5px 0 var(--soft)}
code{font-family:var(--mono);background:var(--soft);padding:1px 5px;border-radius:0}
pre{
  max-width:100%;
  overflow:auto;
  background:var(--ink);
  color:#f3f3f0;
  border-radius:0;
  padding:14px;
  border:1px solid var(--ink);
  white-space:pre-wrap;
  word-break:break-word;
}
pre code{
  display:block;
  min-width:0;
  background:transparent;
  color:inherit;
  padding:0;
  line-height:1.65;
  white-space:inherit;
}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  border:1px solid var(--ink);
  border-radius:999px;
  background:var(--white);
  padding:5px 11px;
  cursor:pointer;
}
.chip:hover{background:var(--ink);color:var(--white)}
.res-list{list-style:none;padding:0!important}
.res-list a{font-weight:800;color:var(--blue)}
.res-list span{display:block;color:var(--muted);font-size:14px}
.project-box{border:1px solid var(--ink);background:var(--white);border-radius:0;padding:14px;box-shadow:6px 6px 0 var(--blue)}
.lesson-meta .badges{margin:0}
.flow{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}
.flow span{
  position:relative;
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--ink);
  color:var(--white);
  padding:8px 11px;
  font-weight:800;
}
.flow span:not(:last-child)::after{
  content:"->";
  margin-left:8px;
  color:var(--blue);
  font-family:var(--mono);
}
.page{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto;
  padding:70px 0 100px;
}
.page-head{margin-bottom:26px}
.page-search{
  width:min(520px,100%);
  border:1px solid var(--ink);
  border-radius:0;
  padding:12px 14px;
  background:var(--paper);
}
.page-head .filter-row{margin-top:14px}
.topic-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:12px;
}
.topic-card{
  border:1px solid var(--line);
  border-radius:0;
  background:rgba(255,255,255,.9);
  padding:18px;
  text-align:left;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.topic-card:hover{border-color:var(--ink);transform:translateY(-5px);box-shadow:7px 7px 0 var(--blue)}
.topic-card b{display:block;margin-bottom:5px}
.topic-card > span:not(.badges){color:#39404b;font-size:13px}
.glossary-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:12px;
}
.glossary-card{
  min-height:150px;
  border:1px solid var(--line);
  border-radius:0;
  background:rgba(255,255,255,.9);
  padding:18px;
  text-align:left;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.glossary-card:hover{border-color:var(--ink);transform:translateY(-5px);box-shadow:7px 7px 0 var(--blue)}
.glossary-card b{
  display:block;
  margin-bottom:7px;
  font-size:18px;
}
.glossary-card > span:not(.badges){color:var(--muted);font-size:14px}
.progress-panel{
  border:1px solid var(--ink);
  border-radius:0;
  background:var(--paper);
  padding:24px;
  box-shadow:8px 8px 0 var(--blue);
}
.progress-row{display:grid;grid-template-columns:190px 1fr 58px;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.progress-row:last-child{border-bottom:0}
.meter{height:10px;border:1px solid var(--ink);background:#fff;border-radius:0;overflow:hidden}
.meter i{display:block;height:100%;background:var(--blue)}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.info-grid article{border:1px solid var(--line);border-radius:0;background:var(--paper);padding:18px}
.info-grid article:hover{border-color:var(--ink);box-shadow:7px 7px 0 var(--blue)}
.info-grid h2{margin:0 0 8px}
@media(max-width:760px){
  .topbar{position:relative;flex-wrap:wrap}
  .nav-toggle{display:flex}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px 0;background:var(--bg);border:1px solid var(--line);border-top:none;box-shadow:0 12px 24px rgba(9,9,9,.08)}
  .nav.is-open{display:flex}
  .nav a{padding:14px 24px;border-bottom:1px solid var(--line)}
  .nav a:last-child{border-bottom:none}
  .roadmap{min-width:0}
  .roadmap::before{left:18px}
  .phase-row{display:block;min-height:0;padding-left:46px}
  .phase-row::after{left:14px}
  .milestone{width:100%;text-align:left;margin-bottom:12px}
  .phase-label{margin:0 0 10px}
  .cluster{margin:10px 0}
  .cluster::before{display:none}
  .phase-checkpoint{margin-bottom:10px}
  .guided-list{grid-template-columns:1fr}
  .progress-row{grid-template-columns:1fr}
}