:root {
  --bg:            #080c08;
  --bg-card:       #0f140f;
  --bg-elevated:   #161d16;
  --border:        #222b21;
  --border-bright: rgba(52,66,50,.7);
  --text:          #e4ece2;
  --text-dim:      #7a897a;
  --text-mute:     #4a574a;
  --lime:          #c7f54a;
  --lime-glow:     rgba(199,245,74,0.12);
  --ember:         #ff7849;
  --ember-glow:    rgba(255,120,73,0.10);
  --green:         #6ecf6e;
  --amber:         #ffb84a;
  --blue:          #5ab4ff;
  --purple:        #b48aff;
  --red:           #ff5a5a;
  --sidebar-w:     460px;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}

body{
  background:var(--bg);
  color:var(--text);
  font-family:'Manrope',sans-serif;
  overflow-x:hidden;
  min-height:100vh;
}
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(ellipse 70% 50% at 10% 0%,var(--lime-glow),transparent),
    radial-gradient(ellipse 60% 60% at 90% 100%,var(--ember-glow),transparent),
    radial-gradient(ellipse 40% 40% at 50% 50%,rgba(90,180,255,.04),transparent);
}

/* ── PAGE ── */
.page{position:relative;z-index:1;transition:margin-right .38s cubic-bezier(.4,0,.2,1);}
.page.sidebar-open{margin-right:var(--sidebar-w);}

/* ── HERO ── */
.hero{
  max-width:800px;margin:0 auto;
  padding:56px 32px 28px;text-align:center;
  border-bottom:1px solid var(--border);
  position:relative;
}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'JetBrains Mono',monospace;font-size:10px;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--lime);padding:5px 14px;
  border:1px solid rgba(199,245,74,.25);border-radius:999px;
  background:rgba(199,245,74,.06);margin-bottom:14px;
  text-decoration:none;transition:all .2s;
}
.badge:hover{border-color:rgba(199,245,74,.6);background:rgba(199,245,74,.1);}
.badge-dot{
  width:6px;height:6px;background:var(--lime);border-radius:50%;
  box-shadow:0 0 8px var(--lime);animation:pulse 2.4s infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.4;transform:scale(.85);}}

.hero-title{
  font-family:'Unbounded',sans-serif;font-weight:800;
  font-size:clamp(32px,5vw,64px);
  line-height:.95;letter-spacing:-.04em;margin-bottom:10px;
}
.hero-title .accent{
  color:var(--lime);
  text-shadow:0 0 60px rgba(199,245,74,.3);
  white-space:nowrap;
}
.hero-sub{
  font-size:13px;color:var(--text-dim);font-weight:400;
  line-height:1.6;max-width:480px;margin:0 auto 16px;
  letter-spacing:.01em;
}
.hero-stats-simple{
  font-family:'JetBrains Mono',monospace;font-size:10px;
  color:var(--text-mute);text-transform:uppercase;letter-spacing:.12em;
  margin-bottom:14px;
}

/* Progress bar */
.progress-bar-wrap{
  width:100%;max-width:360px;margin:0 auto;
  height:2px;background:var(--border);border-radius:999px;overflow:hidden;
}
.progress-bar-fill{
  height:100%;background:linear-gradient(90deg,var(--lime),rgba(199,245,74,.5));
  border-radius:999px;width:0%;
  transition:width .6s cubic-bezier(.4,0,.2,1);
}

/* ── ROADMAP ── */
#roadmap{padding:40px 24px 140px;}
.roadmap-wrap{
  max-width:800px;margin:0 auto;
  display:flex;flex-direction:column;align-items:stretch;
}

/* ── SECTION BLOCK (entrance animation) ── */
.section-block{
  display:flex;flex-direction:column;
  opacity:0;transform:translateY(24px);
  transition:opacity .55s cubic-bezier(.4,0,.2,1),transform .55s cubic-bezier(.4,0,.2,1);
}
.section-block.visible{opacity:1;transform:translateY(0);}

/* ── CONNECTOR ── */
.connector{
  display:flex;flex-direction:column;align-items:center;
  padding:8px 0;position:relative;
}
.connector-line{
  width:1px;height:36px;
  background:var(--border);
  opacity:.7;
}

/* ── EXTRA MATERIALS ── */
.extra-materials{
  width:100%;max-width:848px;margin:-80px auto 0;padding:0 24px 48px;
}
.extra-materials-inner{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:16px;padding:24px;
}
.extra-kicker{
  font-family:'JetBrains Mono',monospace;font-size:9px;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--lime);margin-bottom:8px;
}
.extra-head h2{
  font-family:'Unbounded',sans-serif;font-size:20px;line-height:1.2;
}
.extra-columns{
  display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px;
}
.extra-column{
  background:var(--bg-elevated);border:1px solid var(--border);
  border-radius:12px;padding:18px;
}
.extra-column h3{
  font-family:'Unbounded',sans-serif;font-size:14px;line-height:1.25;
  margin-bottom:12px;color:var(--text);
}
.extra-links{
  list-style:disc;padding-left:16px;display:flex;flex-direction:column;gap:8px;
}
.extra-links li{font-size:13px;line-height:1.45;color:var(--text-dim);}
.extra-links a{
  display:inline-flex;color:var(--text-dim);text-decoration:none;
  transition:color .18s,opacity .18s;
}
.extra-links a:hover{color:var(--lime);text-decoration:underline;}
.extra-placeholder{color:var(--text-mute);font-size:13px;font-style:italic;}

/* ── FOOTER CONTACT ── */
.footer-meta,.footer-actions{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
}
.footer-contact{
  display:inline-flex;align-items:center;
  background:rgba(199,245,74,.06);border:1px solid rgba(199,245,74,.25);
  color:var(--lime);font-family:'JetBrains Mono',monospace;
  font-size:9px;letter-spacing:.1em;text-transform:uppercase;
  padding:7px 12px;border-radius:6px;text-decoration:none;transition:all .18s;
}
.footer-contact:hover{border-color:var(--lime);background:rgba(199,245,74,.1);}

/* ── PARENT NODE ── */
.parent-node{
  width:100%;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px 22px 16px;
  cursor:pointer;
  transition:
    border-color .22s cubic-bezier(.4,0,.2,1),
    box-shadow .22s cubic-bezier(.4,0,.2,1),
    transform .18s cubic-bezier(.4,0,.2,1),
    background .22s ease;
  position:relative;overflow:hidden;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  user-select:none;
}
/* top accent bar */
.parent-node::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--p-accent,var(--lime)),transparent 70%);
  border-radius:16px 16px 0 0;
  opacity:.8;
}
/* ghost number watermark */
.parent-node::after{
  content:attr(data-num);
  position:absolute;right:68px;top:50%;transform:translateY(-50%);
  font-family:'Unbounded',sans-serif;font-weight:800;
  font-size:72px;line-height:1;letter-spacing:-.05em;
  color:var(--p-accent,var(--lime));
  opacity:.04;
  pointer-events:none;
  transition:opacity .22s;
}
.parent-node:hover{
  border-color:rgba(var(--p-accent-rgb,199,245,74),.4);
  box-shadow:0 8px 40px rgba(0,0,0,.4),0 0 0 1px rgba(var(--p-accent-rgb,199,245,74),.15);
  transform:translateY(-1px);
  background:var(--bg-elevated);
}
.parent-node:hover::after{opacity:.07;}
.parent-node.expanded{
  border-color:var(--p-accent,var(--lime));
  box-shadow:0 0 0 1px var(--p-accent,var(--lime)),0 8px 40px rgba(0,0,0,.4);
  background:var(--bg-elevated);
  border-radius:16px 16px 0 0;
}
.parent-node.expanded::after{opacity:.06;}

.parent-node-inner{display:flex;align-items:flex-start;gap:18px;flex:1;min-width:0;}

.parent-num-col{display:flex;flex-direction:column;align-items:flex-start;padding-top:2px;}
.parent-label-num{
  font-family:'JetBrains Mono',monospace;
  font-size:10px;font-weight:700;letter-spacing:.15em;
  color:var(--p-accent,var(--lime));
  background:rgba(var(--p-accent-rgb,199,245,74),.1);
  padding:3px 8px;border-radius:5px;
  white-space:nowrap;
}

.parent-text{display:flex;flex-direction:column;gap:3px;min-width:0;}
.parent-title{
  font-family:'Unbounded',sans-serif;
  font-size:16px;font-weight:700;letter-spacing:-.02em;
  line-height:1.15;color:var(--text);
}
.parent-desc{
  font-size:12px;color:var(--text-mute);line-height:1.55;
  font-weight:400;max-width:520px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.parent-count{
  font-family:'JetBrains Mono',monospace;
  font-size:9px;color:var(--text-mute);letter-spacing:.08em;
  margin-top:1px;
}

.parent-toggle{
  width:30px;height:30px;border-radius:8px;
  background:var(--bg-elevated);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;margin-top:2px;
  transition:all .22s cubic-bezier(.4,0,.2,1);color:var(--text-mute);
}
.parent-node:hover .parent-toggle{border-color:var(--p-accent,var(--lime));}
.parent-node.expanded .parent-toggle{
  background:var(--p-accent,var(--lime));border-color:transparent;
  color:var(--bg);box-shadow:0 0 12px var(--p-accent,var(--lime));
}
.toggle-icon{transition:transform .3s cubic-bezier(.4,0,.2,1);}
.parent-node.expanded .toggle-icon{transform:rotate(180deg);}

/* ── CHILDREN CONTAINER ── */
.children-wrap{
  width:100%;overflow:hidden;
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .42s cubic-bezier(.4,0,.2,1);
  border:1px solid transparent;border-top:none;
  border-radius:0 0 16px 16px;
}
.children-wrap.open{
  grid-template-rows:1fr;
  border-color:var(--p-accent,var(--lime));
  border-top:none;
}
.children-inner{
  min-height:0;overflow:hidden;
  background:linear-gradient(to bottom,var(--bg-elevated),var(--bg-card) 60%);
  border-radius:0 0 14px 14px;
  padding:0;opacity:0;transform:translateY(-8px);
  transition:opacity .3s ease .08s,transform .3s ease .08s;
}
.children-wrap.open .children-inner{
  opacity:1;transform:translateY(0);
  padding:14px 18px 18px;
}

/* ── CHILD NODE ── */
.child-node{
  width:100%;
  background:transparent;
  border:1px solid var(--border);
  border-left:2px solid var(--p-accent,var(--lime));
  border-radius:10px;
  padding:13px 16px;
  cursor:pointer;
  transition:
    background .16s ease,
    border-color .16s ease,
    transform .16s cubic-bezier(.4,0,.2,1),
    box-shadow .16s ease;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:8px;
  position:relative;
}
.child-node:first-child{margin-top:0;}
.child-node:hover{
  background:rgba(var(--p-accent-rgb,199,245,74),.04);
  border-color:rgba(var(--p-accent-rgb,199,245,74),.4);
  border-left-color:var(--p-accent,var(--lime));
  transform:translateX(5px);
  box-shadow:0 2px 16px rgba(0,0,0,.2);
}
.child-node.active-open{
  background:rgba(var(--p-accent-rgb,199,245,74),.06);
  border-color:var(--p-accent,var(--lime));
  box-shadow:inset 3px 0 0 var(--p-accent,var(--lime));
}
.child-node.done{opacity:.6;}
.child-node.done .child-title{color:var(--text-dim);text-decoration:line-through;text-decoration-color:var(--text-mute);}

.child-left{display:flex;align-items:center;gap:10px;flex:1;min-width:0;}
.child-title{
  font-size:13px;font-weight:600;line-height:1.3;
  color:var(--text);white-space:normal;overflow:visible;text-overflow:unset;
}
.child-right{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.child-arrow{
  width:16px;height:16px;
  color:var(--text-mute);opacity:0;
  transition:opacity .16s,transform .16s;
  flex-shrink:0;
}
.child-node:hover .child-arrow{opacity:.6;transform:translateX(2px);}
.child-node.active-open .child-arrow{opacity:.8;color:var(--p-accent,var(--lime));}
.child-check{
  width:17px;height:17px;flex-shrink:0;
  border:1.5px solid var(--border);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  transition:all .18s;background:var(--bg-card);
}
.child-node:hover .child-check{border-color:rgba(var(--p-accent-rgb,199,245,74),.5);}
.child-node.done .child-check{
  background:var(--lime);border-color:var(--lime);
  box-shadow:0 0 8px rgba(199,245,74,.4);
}
.check-mark{display:none;}
.child-node.done .check-mark{display:block;}

/* ── SIDEBAR ── */
.overlay{
  position:fixed;inset:0;z-index:90;
  background:rgba(4,7,4,.65);
  opacity:0;pointer-events:none;
  transition:opacity .32s cubic-bezier(.4,0,.2,1);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.overlay.show{opacity:1;pointer-events:auto;}

.sidebar{
  position:fixed;top:0;right:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--bg-card);
  border-left:1px solid var(--border);
  z-index:100;
  transform:translateX(100%);
  transition:transform .35s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;
}
.sidebar.open{transform:translateX(0);}

/* sidebar accent top strip */
.sidebar::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--sb-accent,var(--lime)),transparent 60%);
  opacity:.8;z-index:1;
  transition:background .3s;
}

.sb-inner{
  flex:1;overflow-y:auto;
  padding:40px 30px 100px;
  scrollbar-width:thin;scrollbar-color:var(--border) transparent;
}
.sb-close{
  position:absolute;top:16px;right:16px;
  width:34px;height:34px;
  background:var(--bg-elevated);border:1px solid var(--border);
  border-radius:8px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  color:var(--text-dim);transition:all .18s;z-index:2;
}
.sb-close:hover{border-color:var(--lime);color:var(--lime);background:rgba(199,245,74,.06);}

.sb-cat{
  display:inline-flex;align-items:center;
  font-family:'JetBrains Mono',monospace;font-size:9px;font-weight:700;
  letter-spacing:.15em;text-transform:uppercase;
  padding:4px 10px;border-radius:5px;border:1px solid;margin-bottom:16px;
}
.sb-title{
  font-family:'Unbounded',sans-serif;font-weight:700;
  font-size:18px;letter-spacing:-.025em;line-height:1.2;margin-bottom:14px;
}
.sb-desc{
  font-size:13px;color:var(--text-dim);line-height:1.8;margin-bottom:26px;
  padding-bottom:26px;border-bottom:1px solid var(--border);
}
.sb-btn{
  width:100%;padding:13px;
  border:1px solid var(--border);border-radius:10px;
  background:var(--bg-elevated);color:var(--text);
  font-family:'Manrope',sans-serif;font-size:13px;font-weight:600;
  cursor:pointer;transition:all .2s;margin-bottom:28px;
  display:flex;align-items:center;justify-content:center;gap:8px;
}
.sb-btn:hover{border-color:var(--lime);color:var(--lime);background:rgba(199,245,74,.06);}
.sb-btn.is-done{
  background:rgba(199,245,74,.12);border-color:var(--lime);color:var(--lime);
}
.sb-mats-label{
  font-family:'JetBrains Mono',monospace;font-size:9px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--text-mute);margin-bottom:10px;
}
.mats-list{display:flex;flex-direction:column;gap:6px;margin-bottom:24px;}
.mat-link{
  display:flex;align-items:flex-start;gap:10px;
  padding:11px 14px;background:var(--bg-elevated);
  border:1px solid var(--border);border-radius:10px;
  text-decoration:none;color:var(--text);
  transition:border-color .18s,background .18s,transform .18s;
}
.mat-link:hover{
  border-color:rgba(199,245,74,.3);
  background:rgba(199,245,74,.04);
  transform:translateX(2px);
}
.mat-badge{
  font-family:'JetBrains Mono',monospace;font-size:8px;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;
  padding:3px 7px;border-radius:4px;flex-shrink:0;margin-top:2px;
}
.t-video{background:rgba(255,120,73,.12);color:var(--ember);}
.t-article{background:rgba(90,180,255,.10);color:var(--blue);}
.t-course{background:rgba(199,245,74,.10);color:var(--lime);}
.t-documentation{background:rgba(255,184,74,.10);color:var(--amber);}
.t-github{background:rgba(138,149,138,.10);color:var(--text-dim);}
.t-whitepaper{background:rgba(180,138,255,.10);color:var(--purple);}
.t-internal{background:rgba(110,207,110,.10);color:var(--green);}
.t-news{background:rgba(90,180,255,.10);color:var(--blue);}
.t-game{background:rgba(110,207,110,.10);color:var(--green);}
.t-other{background:rgba(90,101,90,.10);color:var(--text-mute);}
.mat-title-text{font-size:12.5px;font-weight:500;line-height:1.45;color:var(--text);}
.mat-source{font-size:11px;color:var(--text-mute);margin-top:2px;}
.sb-add{
  display:flex;align-items:center;justify-content:center;gap:7px;
  width:100%;padding:11px;
  border:1px dashed var(--border);border-radius:10px;
  background:transparent;color:var(--text-mute);
  font-family:'Manrope',sans-serif;font-size:12px;
  text-decoration:none;transition:all .18s;cursor:pointer;
}
.sb-add:hover{color:var(--text-dim);border-color:var(--border-bright);}
.sb-empty{font-size:12px;color:var(--text-mute);font-style:italic;padding:8px 0;}

/* ── FOOTER ── */
footer{
  border-top:1px solid var(--border);
  max-width:800px;margin:0 auto;padding:28px 24px;
  display:flex;flex-direction:column;align-items:stretch;gap:6px;
  font-family:'JetBrains Mono',monospace;font-size:10px;
  color:var(--text-mute);text-transform:uppercase;letter-spacing:.1em;
}
.footer-row{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:12px;
}
.footer-row-center{
  display:flex;justify-content:center;
  padding-top:4px;
}
.footer-row .footer-right{display:flex;justify-content:flex-end;}
.footer-row .footer-contact{align-self:center;justify-self:start;}
footer a{color:var(--text-dim);text-decoration:none;transition:color .18s;}
footer a:hover{color:var(--lime);}
.footer-community{color:var(--text-dim);font-size:10px;}
.footer-date{font-size:9px;color:var(--text-mute);letter-spacing:.12em;}
.footer-reset{
  background:transparent;border:1px solid var(--border);
  color:var(--text-mute);font-family:'JetBrains Mono',monospace;
  font-size:9px;letter-spacing:.1em;text-transform:uppercase;
  padding:7px 12px;border-radius:6px;cursor:pointer;transition:all .18s;
}
.footer-reset:hover{border-color:var(--red);color:var(--red);}

/* ── RESPONSIVE ── */
@media(max-width:1100px){.page.sidebar-open{margin-right:0;}}
@media(max-width:700px){
  :root{--sidebar-w:100vw;}
  .page.sidebar-open{margin-right:0;}
  .sidebar{
    top:auto;bottom:0;left:0;right:0;width:100%;height:85vh;
    border-left:none;border-top:1px solid var(--border);
    border-radius:20px 20px 0 0;transform:translateY(100%);
  }
  .sidebar.open{transform:translateY(0);}
  .hero{padding:24px 20px 20px;}
  #roadmap{padding:40px 14px 100px;}
  .parent-node{padding:18px 16px 16px;}
  .parent-title{font-size:14px;}
  .parent-desc{display:none;}
  .parent-node::after{font-size:52px;right:52px;}
  .hero-stats{border-radius:8px;}
  .stat-item{padding:6px 12px;}
  .extra-materials{margin:-60px auto 0;padding:0 14px 40px;}
  .extra-columns{grid-template-columns:1fr;}
}