:root{
 --primary:#673AB7;
 --secondary:#00BCD4;
 --accent:#E91E63;
 --bg:#1A1A2E;
 --text:#FFFFFF;
 --panel:#1E1E1E;
 --panel-2:#252539;
 --muted:#9aa0b4;
 --line:rgba(255,255,255,0.08);
 --radius:4px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg);color:var(--text);font-family:'Inter',sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
code,pre{font-family:'JetBrains Mono',monospace}

/* HERO */.hero{padding:24px 6vw 120px;background:radial-gradient(1200px 600px at 80% -10%,rgba(103,58,183,.35),transparent 60%),radial-gradient(800px 500px at 10% 20%,rgba(0,188,212,.18),transparent 60%),var(--bg);min-height:90vh;display:flex;flex-direction:column}.top-nav{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.logo{font-weight:700;letter-spacing:.5px;color:var(--secondary)}.nav-links{display:flex;gap:28px;list-style:none}.nav-links a{color:var(--muted);font-size:14px;transition:color.2s}.nav-links a:hover{color:var(--text)}.hero-content{margin:auto 0;max-width:880px;padding:80px 0 40px}.hero-tag{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:999px;font-size:12px;color:var(--secondary);margin-bottom:24px;font-family:'JetBrains Mono',monospace}.hero h1{font-size:clamp(2.2rem,5vw,4rem);font-weight:800;line-height:1.05;letter-spacing:-1px;margin-bottom:18px;background:linear-gradient(135deg,#fff 0%,#b8a8ff 70%);-webkit-background-clip:text;background-clip:text;color:transparent}.sub{font-size:1.2rem;color:var(--muted);max-width:640px;margin-bottom:36px}.cta-row{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:var(--radius);font-weight:600;font-size:14px;transition:transform.15s,background.2s,box-shadow.2s;border:1px solid transparent}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#7c4ddd;transform:translateY(-1px);box-shadow:0 8px 24px rgba(103,58,183,.4)}.btn-secondary{background:transparent;border-color:var(--line);color:#fff}.btn-secondary:hover{border-color:var(--secondary);color:var(--secondary)}

/* SECTION */
section{padding:100px 6vw}.section-head{max-width:880px;margin:0 auto 56px;text-align:center}.section-head h2{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:700;letter-spacing:-.5px;margin-bottom:10px}.section-head p{color:var(--muted)}

/* VS CODE */.vscode{max-width:1280px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5)}.vscode-titlebar{display:flex;align-items:center;gap:18px;background:#323233;padding:8px 14px;border-bottom:1px solid #000}.traffic{display:flex;gap:8px}.traffic span{width:12px;height:12px;border-radius:50%;background:#555}.traffic span:nth-child(1){background:#ff5f57}.traffic span:nth-child(2){background:#febc2e}.traffic span:nth-child(3){background:#28c840}.menubar{display:flex;gap:4px;list-style:none}.menubar li{padding:4px 10px;border-radius:4px;font-size:13px;color:#cfcfcf;cursor:pointer;transition:background.15s}.menubar li:hover{background:rgba(255,255,255,.08)}.title-spacer{margin-left:auto;font-size:12px;color:#9a9a9a}.vscode-body{display:grid;grid-template-columns:260px 1fr;min-height:560px}.explorer{background:#181820;border-right:1px solid var(--line);padding:10px 0;font-size:13px}.explorer-head{padding:6px 16px;font-size:11px;letter-spacing:1.5px;color:#9a9a9a;text-transform:uppercase}.file-tree,.file-tree.sub{list-style:none}.file-tree.sub{padding-left:16px}.file-tree li{padding:4px 14px;cursor:pointer;display:flex;align-items:center;gap:6px;border-radius:3px;color:#d4d4d4;transition:background.12s}.file-tree li:hover{background:rgba(255,255,255,.05)}.file.active{background:rgba(103,58,183,.25);color:#fff}.chev{font-size:10px;color:#9a9a9a;width:10px;display:inline-block}.ico.md{font-size:10px;font-weight:700;color:var(--secondary);background:rgba(0,188,212,.12);padding:1px 4px;border-radius:2px}.editor{display:flex;flex-direction:column;background:#1e1e1e;min-width:0}.tabs{display:flex;background:#2d2d30;border-bottom:1px solid #000;overflow-x:auto}.tab{padding:9px 16px;font-size:13px;color:#969696;border-right:1px solid #1a1a1a;cursor:pointer;white-space:nowrap;transition:background.15s,color.15s}.tab:hover{color:#fff}.tab.active{background:#1e1e1e;color:#fff;border-bottom:2px solid var(--secondary)}.tab.chat{margin-left:auto;color:var(--primary);font-weight:600}.tab.chat.active{color:#b8a8ff}.panes{flex:1;position:relative;min-height:480px}.pane{display:none;padding:24px;height:100%;overflow:auto}.pane.active{display:block}.pane pre{font-size:13px;line-height:1.7;color:#d4d4d4}.pane.h1{color:var(--accent);font-weight:700}.pane.h2{color:var(--secondary)}.pane.k{color:#dcdcaa}

/* CHAT */.chat-pane{display:none;flex-direction:column;padding:0}.chat-pane.active{display:flex}.chat-log{flex:1;padding:24px;overflow:auto;display:flex;flex-direction:column;gap:14px;max-height:560px}.msg{padding:12px 16px;border-radius:8px;font-size:14px;max-width:90%;line-height:1.55}.msg.user{background:#2d2d44;align-self:flex-end;border:1px solid rgba(255,255,255,.05)}.msg.agent{background:rgba(103,58,183,.12);border:1px solid rgba(103,58,183,.35);align-self:flex-start}.agent-head{font-size:12px;color:var(--secondary);margin-bottom:8px;font-weight:600}.mode{color:var(--accent);font-family:'JetBrains Mono',monospace;font-size:11px}.msg ol,.msg ul{padding-left:20px;margin:6px 0}.msg li{margin:2px 0}.msg code{background:rgba(0,0,0,.35);padding:1px 5px;border-radius:3px;font-size:12px;color:#dcdcaa}.plan-actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.btn-mini{padding:6px 12px;font-size:12px;border-radius:4px;background:rgba(255,255,255,.08);border:1px solid var(--line);transition:all.15s}.btn-mini:hover{background:rgba(255,255,255,.16)}.btn-mini.primary{background:var(--primary)}.btn-mini.primary:hover{background:#7c4ddd}.todo{background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:6px;padding:12px;margin-top:6px}.todo-title{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--secondary);margin-bottom:6px}.todo ul{list-style:none;padding:0;margin:0}.todo li{padding:3px 0;font-size:13px;color:#cfcfcf;position:relative;padding-left:20px}.todo li:before{content:"○";position:absolute;left:0;color:#666}.todo li.done{color:#7fc97f}.todo li.done:before{content:"✓";color:#7fc97f}.todo li.doing{color:var(--secondary)}.todo li.doing:before{content:"◐";color:var(--secondary)}.table-wrap{overflow-x:auto;margin-top:8px}.cmp{width:100%;border-collapse:collapse;font-size:12px}.cmp th,.cmp td{padding:8px 10px;border:1px solid var(--line);text-align:left}.cmp th{background:rgba(0,188,212,.1);color:var(--secondary);font-weight:600}.composer{display:flex;align-items:center;gap:10px;padding:12px;border-top:1px solid var(--line);background:#181820}.mode-toggle{display:flex;align-items:center;gap:6px;padding:6px 10px;border:1px solid var(--line);border-radius:4px;font-size:11px;cursor:pointer;user-select:none;transition:all.2s}.mode-toggle:hover{border-color:var(--primary)}.mode-toggle.plan.mode-dot{background:var(--accent)}.mode-toggle.edit.mode-dot{background:#7fc97f}.mode-dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}.mode-hint{color:var(--muted);font-family:'JetBrains Mono',monospace}
#chatInput{flex:1;background:#1e1e1e;border:1px solid var(--line);color:#fff;padding:10px 14px;border-radius:4px;font-size:14px;outline:none;transition:border-color.15s}
#chatInput:focus{border-color:var(--primary)}.send{padding:10px 16px;background:var(--primary);border-radius:4px;font-size:13px;font-weight:600;transition:background.15s}.send:hover{background:#7c4ddd}.statusbar{display:flex;gap:18px;background:var(--primary);padding:4px 14px;font-size:12px;align-items:center}.statusbar.right{margin-left:auto}

/* LEVELS */.levels-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:1200px;margin:0 auto}.level-card{background:linear-gradient(145deg,#22223a,#1a1a2e);border:1px solid var(--line);border-radius:8px;padding:30px;transition:transform.25s,border-color.25s}.level-card:hover{transform:translateY(-4px);border-color:rgba(103,58,183,.5)}.level-card.highlight{border-color:rgba(233,30,99,.4);background:linear-gradient(145deg,rgba(103,58,183,.15),rgba(233,30,99,.08))}.lvl{font-family:'JetBrains Mono',monospace;color:var(--secondary);font-size:12px;margin-bottom:8px;letter-spacing:1px}.level-card h3{font-size:1.6rem;margin-bottom:10px}.level-card p{color:var(--muted);margin-bottom:20px}.chat-mini{display:flex;flex-direction:column;gap:6px}.bub{padding:8px 12px;border-radius:6px;font-size:13px;max-width:90%}.bub.q{background:#2d2d44;align-self:flex-end}.bub.a{background:rgba(103,58,183,.18);align-self:flex-start;border:1px solid rgba(103,58,183,.3)}.flow{display:flex;align-items:center;gap:12px;justify-content:center;flex-wrap:wrap}.node{background:#2d2d44;padding:10px 14px;border-radius:6px;font-size:13px;text-align:center;border:1px solid var(--line)}.node.hl{background:rgba(103,58,183,.25);border-color:var(--primary)}.node small{color:var(--muted);font-size:11px}.arrow{color:var(--secondary);font-weight:700}.steps-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:14px;font-size:12px;color:var(--muted);font-family:'JetBrains Mono',monospace;justify-content:center}.agentic-flow{margin-top:6px}.goal{padding:10px 14px;background:rgba(0,188,212,.1);border:1px dashed var(--secondary);border-radius:6px;font-size:13px;margin-bottom:12px;text-align:center}.chain{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.chain span{padding:5px 10px;background:#2d2d44;border-radius:4px;font-size:12px;font-family:'JetBrains Mono',monospace;color:#cfcfcf}.badge{margin-top:18px;padding:8px 12px;background:var(--accent);border-radius:4px;font-size:11px;font-weight:700;letter-spacing:1px;text-align:center}

/* TRAITS */.traits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:1200px;margin:0 auto}.trait{background:#22223a;border:1px solid var(--line);border-radius:8px;padding:30px;transition:border-color.2s}.trait:hover{border-color:var(--secondary)}.trait h3{margin-bottom:10px}.trait p{color:var(--muted);margin-bottom:18px}.pipe{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.pipe span{padding:6px 10px;background:rgba(0,188,212,.1);border:1px solid rgba(0,188,212,.3);border-radius:4px;font-size:12px;font-family:'JetBrains Mono',monospace}.pivot{font-size:13px}.pivot.branch{display:flex;gap:10px;align-items:center;margin:10px 0;flex-wrap:wrap}.pivot.x{color:#ff7a7a;text-decoration:line-through}.pivot.ok{color:#7fc97f}.pivot small{color:var(--muted)}.qlist{list-style:none;padding:0;margin:0 0 12px}.qlist li{padding:8px 12px;background:rgba(255,255,255,.04);border-left:3px solid var(--primary);margin-bottom:6px;font-size:13px;border-radius:0 4px 4px 0}.em{color:var(--accent);font-weight:600}

/* BLOCKS */.blocks-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:1200px;margin:0 auto}.block{background:#22223a;border:1px solid var(--line);border-radius:8px;padding:30px}.block h3{margin-bottom:10px}.block p{color:var(--muted);margin-bottom:18px}.snippet{background:#0e0e1a;border:1px solid var(--line);border-radius:4px;padding:14px;font-size:12px;color:#d4d4d4;overflow-x:auto}.snippet.h1{color:var(--accent)}.tools{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}.tool{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;background:rgba(0,188,212,.08);border:1px solid rgba(0,188,212,.25);border-radius:4px;font-size:13px}.tool span{font-size:10px;font-weight:700;color:var(--secondary);letter-spacing:1px}.block small{color:var(--muted);font-size:12px}

/* ACCORDION */.accordion{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:8px}.acc-item{background:#22223a;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:border-color.2s}.acc-item.open{border-color:var(--primary)}.acc-head{width:100%;text-align:left;padding:16px 20px;font-size:14px;font-weight:500;display:flex;justify-content:space-between;align-items:center;transition:background.15s}.acc-head:after{content:"+";color:var(--secondary);font-size:18px;transition:transform.2s}.acc-item.open.acc-head:after{content:"−"}.acc-head:hover{background:rgba(255,255,255,.03)}.acc-body{max-height:0;overflow:hidden;transition:max-height.25s ease,padding.25s ease;padding:0 20px}.acc-item.open.acc-body{max-height:200px;padding:0 20px 18px}.acc-body p{color:var(--muted);font-size:13px}

/* MISTAKES + TIPS */.mistake-grid,.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;max-width:1200px;margin:0 auto}.mistake,.tip{background:#22223a;border:1px solid var(--line);border-radius:8px;padding:26px;transition:transform.2s,border-color.2s}.mistake:hover,.tip:hover{transform:translateY(-3px);border-color:var(--primary)}.m-num,.t-num{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--accent);letter-spacing:2px;margin-bottom:8px}.t-num{color:var(--secondary)}.mistake h3,.tip h3{margin-bottom:14px;font-size:1.3rem}.vs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}.col{padding:12px;border-radius:4px;font-size:12px}.col h4{font-size:11px;text-transform:uppercase;letter-spacing:1px;margin-bottom:6px}.col.bad{background:rgba(233,30,99,.08);border:1px solid rgba(233,30,99,.25)}.col.bad h4{color:#ff7aa8}.col.good{background:rgba(0,188,212,.08);border:1px solid rgba(0,188,212,.25)}.col.good h4{color:var(--secondary)}.col ul{list-style:none;padding:0}.col li{padding:2px 0;color:#cfcfcf}.mistake small,.tip small{color:var(--muted);font-size:12px;display:block;margin-top:8px}.tree{background:#0e0e1a;border:1px solid var(--line);border-radius:4px;padding:14px;font-size:12px;color:#d4d4d4}

/* FINAL CTA */.final-cta{text-align:center;background:radial-gradient(800px 400px at 50% 0%,rgba(103,58,183,.3),transparent 70%);padding:120px 6vw}.final-cta h2{font-size:clamp(2rem,4vw,3rem);font-weight:800;margin-bottom:14px;letter-spacing:-1px}.final-cta p{color:var(--muted);margin-bottom:32px}.notify{display:flex;gap:10px;max-width:480px;margin:0 auto 16px;flex-wrap:wrap;justify-content:center}.notify input{flex:1;min-width:240px;padding:12px 16px;background:#22223a;border:1px solid var(--line);color:#fff;border-radius:4px;font-size:14px;outline:none;transition:border-color.15s}.notify input:focus{border-color:var(--primary)}.notify-ok{color:#7fc97f;font-size:14px;margin-bottom:24px}.final-cta.cta-row{justify-content:center;margin-top:14px}

/* FOOTER */.footer{padding:40px 6vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}.footer p{color:var(--muted);font-style:italic}.footer small{color:#555}

/* TOAST */.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--primary);color:#fff;padding:12px 20px;border-radius:6px;font-size:14px;box-shadow:0 10px 30px rgba(0,0,0,.4);opacity:0;transition:opacity.25s,transform.25s;z-index:1000;max-width:90vw;text-align:center}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* RESPONSIVE */
 (max-width:760px){.nav-links{display:none}.vscode-body{grid-template-columns:1fr}.explorer{border-right:none;border-bottom:1px solid var(--line);max-height:200px;overflow:auto}.menubar{display:none}
 section{padding:70px 5vw}.vs{grid-template-columns:1fr}
}