/* ===== Pentraex GeoAI Hub — page system ===== */
body{font-family:'Hind Siliguri','Plus Jakarta Sans',sans-serif}
.nav{gap:14px}.nav nav a{display:flex;gap:5px;align-items:center;padding:6px 10px;border-radius:10px;font-size:.92rem}
.nav nav a.act{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff!important}
#menu{display:none;border:1px solid var(--bd);background:var(--card);border-radius:10px;padding:6px 10px;color:var(--tx);cursor:pointer}
@media(max-width:980px){#menu{display:block;margin-left:auto}.nav nav{display:none!important;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:var(--bg);padding:10px 16px;border-bottom:1px solid var(--bd)}.nav nav.open{display:flex!important}}
.wrap{max-width:1240px}
.pagehero{position:relative;padding:48px 16px 34px;text-align:center;overflow:hidden}
.pagehero h1{font-size:clamp(1.8rem,4.5vw,3rem);margin:10px 0 8px;line-height:1.2}.pagehero p{color:var(--mut);max-width:820px;margin:0 auto}
.crumb{font-size:.85rem;color:var(--mut)}.crumb a{text-decoration:none;color:var(--ac)}
.band{border-radius:26px;padding:34px 28px;color:#fff;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c) 45%,#111));position:relative;overflow:hidden;margin:18px 0}
.band:after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:#ffffff1f}
.band h1{margin:6px 0;font-size:clamp(1.7rem,4vw,2.6rem)}.band p{opacity:.92;max-width:860px;margin:6px 0}.band .crumb,.band .crumb a{color:#ffffffcc}
.band .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.band .meta span{background:#ffffff26;padding:5px 12px;border-radius:99px;font-size:.85rem}
.band .bic{font-size:3rem;position:absolute;right:28px;bottom:18px;opacity:.9}
.toc{display:flex;flex-wrap:wrap;gap:8px;padding:14px;border-radius:18px;background:var(--card);border:1px solid var(--bd);margin:18px 0;position:sticky;top:64px;z-index:9;backdrop-filter:blur(12px)}
.toc b{width:100%;font-size:.85rem;color:var(--mut)}.toc a{padding:5px 11px;border-radius:99px;border:1px solid var(--bd);text-decoration:none;font-size:.82rem;background:var(--bg);white-space:nowrap}
.toc a:hover{border-color:var(--c,var(--ac));color:var(--c,var(--ac))}
.toc.compact{position:static}
.infogrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:18px 0}
.info{padding:18px;border-radius:18px;background:var(--card);border:1px solid var(--bd);border-top:4px solid var(--k,var(--ac))}
.info h4{margin:0 0 6px;font-size:1rem}.info p{margin:0;color:var(--mut);font-size:.93rem}
.part{margin:22px 0;border-radius:22px;background:var(--card);border:1px solid var(--bd);overflow:hidden;scroll-margin-top:140px}
.part>header{display:flex;gap:14px;align-items:center;padding:16px 20px;background:linear-gradient(90deg,color-mix(in srgb,var(--c) 16%,transparent),transparent);border-bottom:1px solid var(--bd)}
.part .num{flex:none;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--c);color:#fff;font-weight:800}
.part h2,.part h3{margin:0;font-size:1.2rem}.part header small{color:var(--mut)}.part .body{padding:18px 20px}
.lvl{font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:99px;background:color-mix(in srgb,var(--c) 18%,transparent);color:var(--c)}
.subs{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:12px 0}
.sub{padding:14px;border-radius:14px;border:1px solid var(--bd);background:var(--bg);position:relative}
.sub b{display:block;color:var(--c);margin-bottom:4px}.sub span{font-size:.92rem}
.sub:before{content:attr(data-n);position:absolute;right:12px;top:10px;font-size:.72rem;color:var(--mut)}
.explain{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:760px){.explain{grid-template-columns:1fr}}
.explain div{padding:14px 16px;border-radius:14px;background:color-mix(in srgb,var(--c) 9%,var(--card));border-left:4px solid var(--c)}
.explain div:last-child{background:var(--bg)}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.btn.sm{padding:7px 13px;font-size:.85rem}
.btn.done{background:linear-gradient(135deg,#10b981,#059669)}
.codebox{border-radius:18px;overflow:hidden;border:1px solid #2a2a45;background:#0e0f1f;margin:12px 0}
.codeedit{width:100%;border:0;background:#0e0f1f;color:#e0e7ff;font:13.5px/1.55 'JetBrains Mono',Consolas,monospace;padding:16px;resize:vertical;tab-size:4;outline:none}
.cbar{display:flex;gap:8px;align-items:center;padding:8px 10px;background:#17182e;flex-wrap:wrap}.cbar .st{color:#a5b4fc;font-size:.82rem;margin-left:auto}
.cbar .btn.ghost{background:#23244a;color:#e0e7ff;border-color:#34355e}
.cout{margin:0;padding:12px 16px;color:#86efac;background:#070712;font:12.5px/1.5 'JetBrains Mono',monospace;white-space:pre-wrap;max-height:380px;overflow:auto}.cout:empty{display:none}.cout.err{color:#fca5a5}
.cplots img{display:block;max-width:100%;background:#fff;margin:0 auto}
.tasks{counter-reset:tk;list-style:none;padding:0;margin:10px 0;display:grid;gap:8px}
.tasks li{counter-increment:tk;padding:12px 14px 12px 52px;border-radius:14px;background:var(--bg);border:1px solid var(--bd);position:relative}
.tasks li:before{content:counter(tk);position:absolute;left:12px;top:10px;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--c);color:#fff;font-weight:700}
.quiz{display:grid;gap:12px}.qz{padding:14px;border-radius:16px;background:var(--bg);border:1px solid var(--bd)}.qz p{margin:0 0 8px;font-weight:600}
.qz button{display:block;width:100%;text-align:left;margin:5px 0;padding:9px 12px;border-radius:10px;border:1px solid var(--bd);background:var(--card);color:var(--tx);cursor:pointer;font:inherit}
.qz button.ok{background:#10b98126;border-color:#10b981}.qz button.no{background:#ef444426;border-color:#ef4444}
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.vcard{display:flex;flex-direction:column;gap:4px;text-align:left;padding:0 0 10px;border-radius:16px;border:1px solid var(--bd);background:var(--card);color:var(--tx);cursor:pointer;overflow:hidden;font:inherit;transition:.2s}
.vcard:hover{transform:translateY(-3px);box-shadow:0 14px 30px -16px var(--ac)}.vcard b,.vcard small{padding:0 12px}.vcard b{font-size:.9rem;line-height:1.35}.vcard small{color:var(--mut);font-size:.78rem}
.vcard .th{position:relative;aspect-ratio:16/9;background:#000}.vcard img{width:100%;height:100%;object-fit:cover;display:block}
.vcard .th i{position:absolute;inset:0;display:grid;place-items:center;font-style:normal;font-size:2rem;color:#fff;background:#0004;opacity:0;transition:.2s}.vcard:hover .th i{opacity:1}
.vcard .th em{position:absolute;left:8px;top:8px;font-style:normal;font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:99px;background:#000a;color:#fff}
.vtabs{display:flex;gap:8px;margin:10px 0}.vtabs button{padding:8px 14px;border-radius:99px;border:1px solid var(--bd);background:var(--card);color:var(--tx);cursor:pointer;font:inherit;font-weight:600}.vtabs .on{background:var(--c,var(--ac));color:#fff;border-color:transparent}
.addv{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.addv input,.addv select{padding:9px 12px;border-radius:10px;border:1px solid var(--bd);background:var(--bg);color:var(--tx);font:inherit;flex:1;min-width:150px}
.float.big{left:5vw!important;top:8vh!important;right:auto!important;bottom:auto!important;width:90vw!important;max-width:1100px}
.fbar button{margin-left:6px}
.links{display:flex;flex-wrap:wrap;gap:8px}.links a{padding:8px 14px;border-radius:12px;border:1px solid var(--bd);background:var(--card);text-decoration:none;font-size:.88rem;transition:.2s}.links a:hover{border-color:var(--c,var(--ac));transform:translateY(-2px)}
.pnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0}.pnav a{padding:16px;border-radius:16px;background:var(--card);border:1px solid var(--bd);text-decoration:none}.pnav a small{display:block;color:var(--mut)}.pnav a:last-child{text-align:right}
.md h1,.md h2,.md h3{color:var(--c)}.md code{background:var(--bg);padding:1px 6px;border-radius:6px}.md pre{background:#0e0f1f;color:#e0e7ff;padding:14px;border-radius:12px;overflow:auto}.md table{border-collapse:collapse}.md td,.md th{border:1px solid var(--bd);padding:6px 10px}
.lgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.lcard{display:block;padding:20px;border-radius:20px;background:var(--card);border:1px solid var(--bd);text-decoration:none;position:relative;overflow:hidden;transition:.25s}
.lcard:before{content:"";position:absolute;inset:0 0 auto;height:5px;background:var(--c)}.lcard:hover{transform:translateY(-4px);box-shadow:0 18px 36px -18px var(--c)}
.lcard .ic{font-size:2rem}.lcard h3{margin:6px 0 4px}.lcard p{margin:0;color:var(--mut);font-size:.9rem}.lcard .mini{display:flex;gap:10px;margin-top:10px;font-size:.78rem;color:var(--mut)}
.lcard .bar{margin-top:10px}
.foot{margin-top:60px;border-top:1px solid var(--bd);background:var(--card);padding:34px 0 10px}.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:20px}.fgrid a{display:block;color:var(--mut);text-decoration:none;margin:4px 0}.fgrid p{color:var(--mut)}.copy{text-align:center;color:var(--mut);font-size:.85rem}
@media(max-width:700px){.fgrid{grid-template-columns:1fr}}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:20px 0}.kpis div{padding:16px;border-radius:18px;background:var(--card);border:1px solid var(--bd);text-align:center}.kpis b{display:block;font-size:1.8rem;background:linear-gradient(90deg,var(--ac),var(--ac2));-webkit-background-clip:text;color:transparent}.kpis span{color:var(--mut);font-size:.85rem}
.domgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}.dom{padding:16px 12px;border-radius:18px;text-align:center;color:#fff;text-decoration:none;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c) 55%,#000));transition:.2s}.dom:hover{transform:translateY(-4px) rotate(-1deg)}.dom span{font-size:1.8rem;display:block}
/* ===== n8n-style graph ===== */
.gwrap{position:relative;height:calc(100vh - 150px);min-height:520px;border-radius:22px;border:1px solid var(--bd);overflow:hidden;background-color:var(--bg);background-image:radial-gradient(circle,var(--bd) 1.2px,transparent 1.2px);background-size:22px 22px;cursor:grab;touch-action:none}
.gwrap.drag{cursor:grabbing}#gcanvas{position:absolute;left:0;top:0;transform-origin:0 0}
#gedges{position:absolute;left:0;top:0;overflow:visible;pointer-events:none}
#gedges path{fill:none;stroke:var(--mut);stroke-opacity:.45;stroke-width:2.2}#gedges path.hot{stroke:var(--ac2);stroke-opacity:1;stroke-width:3;stroke-dasharray:8 6;animation:flow 1s linear infinite}
@keyframes flow{to{stroke-dashoffset:-14}}
.gnode{position:absolute;width:210px;border-radius:14px;background:var(--card);border:1.5px solid var(--bd);box-shadow:0 10px 26px -14px #0006;cursor:pointer;user-select:none;backdrop-filter:blur(8px)}
.gnode .gh{display:flex;gap:8px;align-items:center;padding:9px 11px;border-radius:13px 13px 0 0;background:linear-gradient(90deg,var(--c),color-mix(in srgb,var(--c) 60%,#000));color:#fff;font-weight:700;font-size:.86rem}
.gnode .gb{padding:8px 11px;font-size:.76rem;color:var(--mut)}.gnode .gb .bar{margin-top:6px;height:5px}
.gnode:before,.gnode:after{content:"";position:absolute;top:18px;width:12px;height:12px;border-radius:50%;background:var(--bg);border:2.5px solid var(--c)}.gnode:before{left:-7px}.gnode:after{right:-7px}
.gnode.topic{width:180px}.gnode.topic .gh{background:var(--card);color:var(--tx);border-bottom:1px solid var(--bd);font-weight:600;font-size:.8rem}
.gnode.sel{outline:3px solid var(--ac2);outline-offset:2px}.gnode.dim{opacity:.25}
.gtools{position:absolute;left:12px;top:12px;z-index:5;display:flex;gap:6px;flex-wrap:wrap}.gtools button,.gtools input,.gtools select{padding:8px 12px;border-radius:10px;border:1px solid var(--bd);background:var(--card);color:var(--tx);font:inherit;font-size:.85rem;cursor:pointer}
.ginfo{position:absolute;right:12px;top:12px;width:300px;max-height:calc(100% - 24px);overflow:auto;z-index:5;padding:16px;border-radius:18px;background:var(--card);border:1px solid var(--bd);backdrop-filter:blur(14px);display:none}.ginfo.on{display:block}
.glegend{position:absolute;left:12px;bottom:12px;z-index:5;font-size:.78rem;color:var(--mut);background:var(--card);padding:6px 10px;border-radius:10px;border:1px solid var(--bd)}
@media(max-width:700px){.ginfo{left:12px;right:12px;width:auto;top:auto;bottom:12px;max-height:45%}}
/* ===== Notebook lab ===== */
.nbbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:12px;border-radius:18px;background:var(--card);border:1px solid var(--bd);position:sticky;top:64px;z-index:8;backdrop-filter:blur(12px)}
.nbbar input{padding:8px 12px;border-radius:10px;border:1px solid var(--bd);background:var(--bg);color:var(--tx);font:inherit;font-weight:700;min-width:200px}
.nbbar select,.nbbar .btn{font-size:.85rem;padding:8px 12px}.nbst{margin-left:auto;color:var(--mut);font-size:.82rem}
.cell{display:grid;grid-template-columns:52px 1fr;margin:12px 0;border-radius:16px;border:1px solid var(--bd);background:var(--card);overflow:hidden}
.cell.sel{border-color:var(--ac);box-shadow:0 0 0 3px color-mix(in srgb,var(--ac) 25%,transparent)}
.cell .gut{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 4px;background:var(--bg);border-right:1px solid var(--bd);font:12px 'JetBrains Mono',monospace;color:var(--mut)}
.cell .gut button{width:32px;height:32px;border-radius:50%;border:0;background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;cursor:pointer}
.cell .ctools{display:flex;gap:4px;justify-content:flex-end;padding:4px 8px;border-bottom:1px solid var(--bd);font-size:.75rem}.cell .ctools button{border:0;background:none;color:var(--mut);cursor:pointer;padding:3px 6px;border-radius:6px}.cell .ctools button:hover{background:var(--bg);color:var(--tx)}
.cell textarea{width:100%;border:0;outline:0;resize:vertical;padding:12px 14px;font:13.5px/1.55 'JetBrains Mono',monospace;background:#0e0f1f;color:#e0e7ff;min-height:60px;tab-size:4}
.cell.md textarea{background:var(--bg);color:var(--tx);font-family:'Hind Siliguri',sans-serif}.cell .mdv{padding:12px 16px;cursor:text}
.cell .cout{max-height:420px}.addrow{display:flex;justify-content:center;gap:8px;opacity:.5;transition:.2s}.addrow:hover{opacity:1}.addrow button{font-size:.78rem;padding:4px 12px;border-radius:99px;border:1px dashed var(--bd);background:none;color:var(--tx);cursor:pointer}
.nbside{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:14px 0}.nbside button{padding:12px;border-radius:14px;border:1px solid var(--bd);background:var(--card);color:var(--tx);text-align:left;cursor:pointer;font:inherit}.nbside button b{display:block}.nbside button small{color:var(--mut)}
.pill2{display:inline-flex;gap:6px;align-items:center;padding:4px 10px;border-radius:99px;background:var(--card);border:1px solid var(--bd);font-size:.8rem}
.toc{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin;padding:10px 12px}.toc b{display:none}
.why{padding:16px 18px;border-radius:16px;background:linear-gradient(135deg,color-mix(in srgb,var(--c) 14%,var(--card)),var(--card));border:1px solid color-mix(in srgb,var(--c) 35%,transparent);margin-bottom:14px}.why p{margin:6px 0 0}
.steps{list-style:none;padding:0;margin:0 0 14px;position:relative}.steps:before{content:"";position:absolute;left:34px;top:10px;bottom:10px;width:3px;border-radius:3px;background:linear-gradient(var(--c),color-mix(in srgb,var(--c) 20%,transparent))}
.steps li{display:flex;gap:14px;align-items:flex-start;margin:10px 0;position:relative}.steps li>div{flex:1;padding:12px 16px;border-radius:14px;background:var(--bg);border:1px solid var(--bd)}
.steps .sn{flex:none;width:70px;text-align:center;padding:6px 0;border-radius:99px;background:var(--c);color:#fff;font-weight:700;font-size:.8rem;z-index:1;margin-top:6px}
.steps.mini .sn{width:30px;height:30px;padding:0;display:grid;place-items:center;margin-top:4px}.steps.mini:before{left:14px}.steps.mini li>div{padding:8px 12px;font-size:.92rem}
.whyline{margin:12px 0 4px;color:var(--mut)}