@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700;800&display=swap');
/* ============================================================
   AI Knowledge Center — hub / graph / reader design system.
   Aligned to the portfolio (vikkybharadwaj.github.io) and the
   Product Cockpit: JetBrains Mono, dark-only #0a0f1a canvas,
   glassy translucent cards, ambient glow, green→blue gradient.
   Variable names are preserved so every existing rule + inline
   style keeps working — only the values are remapped.
   ============================================================ */

:root {
  /* portfolio palette */
  --bg:#0a0f1a; --bg-soft:#0f1626; --bg-card:rgba(17,24,39,.6); --bg-card-solid:#111827;
  --border:rgba(255,255,255,.08); --border-2:rgba(255,255,255,.18);
  --text:#e2e8f0; --text-soft:#94a3b8; --text-dim:#64748b;
  --accent:#00D26A;        /* green — primary */
  --accent-2:#4F8CFF;      /* blue — links */
  --accent-3:#2dd4bf;      /* teal — positive / GA */
  --accent-4:#a855f7;      /* purple — advanced */
  --warn:#f59e0b;          /* amber — experimental */
  --danger:#fb7185;        /* rose */
  --grad:linear-gradient(100deg,var(--accent),var(--accent-2));
  --radius:14px; --radius-sm:10px; --shadow:0 18px 50px rgba(0,0,0,.5);
  --maxw:1140px;
  --sans:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;font-size:15.5px;letter-spacing:-.1px;overflow-x:hidden}

/* ambient glow blobs */
body::before,body::after{content:"";position:fixed;z-index:-1;pointer-events:none;border-radius:50%;filter:blur(120px);opacity:.16}
body::before{top:-160px;left:-120px;width:520px;height:520px;background:radial-gradient(closest-side,var(--accent),transparent)}
body::after{top:220px;right:-180px;width:560px;height:560px;background:radial-gradient(closest-side,var(--accent-2),transparent)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
strong,b{color:var(--text);font-weight:700}
code{font-family:var(--mono);font-size:.88em;background:rgba(255,255,255,.06);color:#8fe7b8;padding:1.5px 6px;border-radius:6px;border:1px solid var(--border)}
pre{background:rgba(0,0,0,.32);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px;overflow-x:auto;font-family:var(--mono);font-size:.82rem;line-height:1.6}
pre code{background:none;border:none;padding:0;color:var(--text)}

/* ---------- sticky top nav (portfolio pattern) ---------- */
.nav,.topbar{position:sticky;top:0;z-index:50;background:rgba(10,15,26,.72);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav .wrap,.topbar .wrap{display:flex;align-items:center;gap:6px;height:60px}
.nav .brand,.topbar .brand{display:flex;align-items:center;gap:9px;margin-right:auto;font-weight:800;font-size:1rem;letter-spacing:-.5px;color:var(--text)}
.nav .brand:hover,.topbar .brand:hover{text-decoration:none}
.nav .brand .dot,.topbar .brand .dot{width:11px;height:11px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(0,210,106,.18)}
.nav .brand .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav nav,.nav .navlinks{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav a,.topbar nav a{font-size:.78rem;color:var(--text-soft);padding:7px 11px;border-radius:8px;white-space:nowrap;transition:color .15s,background .15s}
.nav a:hover,.topbar nav a:hover{background:rgba(255,255,255,.05);color:var(--text);text-decoration:none}
.nav a.active,.topbar nav a.active{background:var(--grad);color:#06120c;font-weight:700}
.nav a.active:hover,.topbar nav a.active:hover{color:#06120c;box-shadow:0 8px 22px rgba(0,210,106,.25);text-decoration:none}
/* Cross-view CTA — a distinct destination, NOT the active tab. Purple→blue so it never reads as "you are here". */
.nav .pill,.topbar nav a.cta{margin-left:8px;background:linear-gradient(100deg,var(--accent-4),var(--accent-2));color:#fff;font-weight:700}
.nav .pill:hover,.topbar nav a.cta:hover{color:#fff;box-shadow:0 8px 22px rgba(168,85,247,.30);text-decoration:none}
@media (max-width:760px){
  .nav .wrap,.topbar .wrap{overflow-x:auto;gap:2px;-webkit-overflow-scrolling:touch}
  .nav .wrap::-webkit-scrollbar,.topbar .wrap::-webkit-scrollbar{display:none}
  .nav a,.topbar nav a{padding:6px 9px;font-size:.74rem}
}

/* hero */
.hero{padding:84px 0 34px;position:relative}
.eyebrow{font-family:var(--mono);text-transform:uppercase;letter-spacing:.2em;font-size:.7rem;color:var(--accent);font-weight:700;margin-bottom:14px}
.hero h1{font-size:clamp(2.2rem,6vw,3.6rem);line-height:1.06;letter-spacing:-2px;margin:0 0 .35em;font-weight:800}
.hero h1 .grad,.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{font-size:1.08rem;color:var(--text-soft);max-width:none;margin:0 0 26px;line-height:1.75}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:10px;font-weight:700;font-size:.82rem;font-family:var(--sans);border:1px solid var(--border);background:transparent;color:var(--text);cursor:pointer;transition:transform .15s,box-shadow .2s,border-color .2s}
.btn:hover{text-decoration:none;border-color:var(--border-2);transform:translateY(-2px)}
.btn.primary{background:var(--grad);border:none;color:#06120c}
.btn.primary:hover{box-shadow:0 12px 32px rgba(0,210,106,.28)}

section{margin:0;padding:64px 0;border-top:1px solid var(--border);scroll-margin-top:80px}
section:first-of-type{border-top:none}
h2{font-size:clamp(1.5rem,3.2vw,2.1rem);letter-spacing:-1px;margin:0 0 .2em;font-weight:800}
h2 + .lead{color:var(--text-soft);max-width:65ch;margin:.2em 0 1.4em}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.section-head .count{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text-dim)}

/* glassy card mixin used across module/view/feature/pillar/hub */
.modules{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:18px}
.module{position:relative;display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;backdrop-filter:blur(8px);transition:transform .15s,border-color .2s,box-shadow .2s;overflow:hidden}
.module.live:hover{transform:translateY(-4px);border-color:var(--border-2);box-shadow:0 18px 50px rgba(0,210,106,.1)}
.module .topline{display:flex;align-items:center;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.module h3{margin:0;font-size:1.18rem;letter-spacing:-.5px}
.module .tagline{color:var(--text-soft);font-size:.9rem;margin:6px 0 14px;flex:1}
.module .mlinks{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto}
.module .mlinks a{font-size:.76rem;padding:5px 10px;border:1px solid var(--border);border-radius:8px;color:var(--text-soft)}
.module .mlinks a:hover{border-color:var(--accent);color:var(--text);text-decoration:none}
.module .go{margin-top:14px;font-weight:700;color:var(--accent);font-size:.85rem}
.module.soon{opacity:.72}
.module.soon .accentbar{background:var(--text-dim)}
.accentbar{position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.module .icon{font-size:20px}

.status{font-family:var(--mono);font-size:.62rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:999px;border:1px solid var(--border);color:var(--text-soft);background:rgba(255,255,255,.03)}
.status.live{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.status.building{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 45%,transparent)}
.status.planned{color:var(--text-dim)}
.chip{font-family:var(--mono);font-size:.68rem;font-weight:600;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.025);border:1px solid var(--border);color:var(--text-soft)}

/* feature rows / philosophy */
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.feature{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;backdrop-filter:blur(8px)}
.feature h3{margin:.1em 0 .3em;font-size:1.02rem;letter-spacing:-.4px}
.feature p{color:var(--text-soft);margin:0;font-size:.9rem}
.feature .n{font-family:var(--mono);font-size:.7rem;font-weight:700;color:var(--accent)}

/* pillars */
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.pillar{border:1px solid var(--border);border-radius:var(--radius);padding:22px;background:var(--bg-card);backdrop-filter:blur(8px)}
.pillar.me{border-color:color-mix(in srgb,var(--accent) 45%,transparent);box-shadow:0 0 0 1px color-mix(in srgb,var(--accent) 30%,transparent) inset}
.pillar h3{margin:.1em 0 .35em;letter-spacing:-.5px}
.pillar .role{font-family:var(--mono);font-size:.65rem;text-transform:uppercase;letter-spacing:.14em;color:var(--accent);font-weight:700}
.pillar p{color:var(--text-soft);font-size:.9rem}

.callout{border-left:3px solid var(--accent);background:rgba(255,255,255,.03);padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:18px 0}
.callout .label{font-family:var(--mono);font-weight:700;font-size:.66rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);display:block;margin-bottom:4px}

footer{border-top:1px solid var(--border);margin-top:0;padding:50px 0 70px;color:var(--text-dim);font-size:.86rem}
footer a{color:var(--text-soft)}

@media (max-width:640px){.hero h1{font-size:2.1rem}.hero .sub{font-size:1rem}}

/* ===== two-view chooser ===== */
.views{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:8px 0 10px}
.view{position:relative;display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;overflow:hidden;backdrop-filter:blur(8px);transition:transform .15s,border-color .2s,box-shadow .2s}
.view:hover{transform:translateY(-4px);border-color:var(--border-2);box-shadow:0 18px 50px rgba(0,210,106,.1);text-decoration:none}
.view .view-ic{font-size:32px;line-height:1;margin-bottom:10px}
.view h2{font-size:1.5rem;margin:0 0 .25em}
.view p{color:var(--text-soft);font-size:.95rem;margin:0 0 14px;flex:1}
.view .chips{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
.view .go{font-weight:700;color:var(--accent);font-size:.95rem}
@media (max-width:760px){.views{grid-template-columns:1fr}}

/* ===== knowledge graph ===== */
.controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.legend{display:flex;gap:12px;flex-wrap:wrap;margin-left:auto}
.legend .lg{display:inline-flex;align-items:center;gap:6px;font-size:.7rem;color:var(--text-soft)}
.legend .lg i{width:11px;height:11px;border-radius:50%;display:inline-block}
.graph-wrap{position:relative;border:1px solid var(--border);border-radius:var(--radius);background:radial-gradient(circle at 50% 40%,rgba(17,24,39,.5),transparent);overflow:hidden;height:min(72vh,640px)}
#graph{width:100%;height:100%;display:block;touch-action:none}
#node-panel{position:absolute;top:14px;right:14px;width:300px;max-width:calc(100% - 28px);max-height:calc(100% - 28px);overflow:auto;background:rgba(17,24,39,.92);border:1px solid var(--border-2);border-radius:var(--radius-sm);padding:16px 18px;opacity:0;transform:translateY(-6px);pointer-events:none;transition:opacity .15s,transform .15s;box-shadow:var(--shadow);backdrop-filter:blur(10px)}
#node-panel.show{opacity:1;transform:none;pointer-events:auto}
#node-panel h3{margin:.3em 0 .4em;font-size:1.1rem}
.np-head{display:flex;gap:8px;align-items:center;justify-content:space-between}
.np-layer{font-family:var(--mono);font-size:.62rem;font-weight:700;color:#06120c;padding:2px 9px;border-radius:999px}
.np-depth{font-family:var(--mono);font-size:.62rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em}
.np-tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:10px}
.np-tags span{font-family:var(--mono);font-size:.62rem;color:var(--text-soft);background:rgba(255,255,255,.04);border:1px solid var(--border);padding:1px 7px;border-radius:999px}
.np-sec{font-family:var(--mono);font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin:10px 0 4px}
#node-panel ul{margin:0;padding-left:0;list-style:none}
#node-panel li{font-size:.8rem;color:var(--text-soft);margin-bottom:7px;line-height:1.4}
#node-panel .etype{font-family:var(--mono);font-size:.7rem}
#node-panel .ewhy{color:var(--text-dim);font-size:.74rem}
.np-open{display:inline-block;margin-top:10px;font-weight:700;font-size:.82rem}
.np-close{position:absolute;top:8px;right:10px;background:none;border:none;color:var(--text-dim);font-size:16px;line-height:1;cursor:pointer;padding:3px 6px;border-radius:6px}
.np-close:hover{color:var(--text);background:rgba(255,255,255,.05)}

/* ===== concept graph (SVG): chips, typed arrows, spine lanes ===== */
.kc-lanes,.kc-edges,.kc-hover{pointer-events:none}
.kc-lane-name{fill:var(--text-soft);font-family:var(--sans);font-size:12.5px;font-weight:700}
.kc-lane-sub{fill:var(--text-dim);font-family:var(--mono);font-size:10.5px;letter-spacing:.3px}
.kc-edge{stroke-width:1.4;opacity:.3;transition:opacity .12s,stroke-width .12s}
.kc-edge.on{opacity:.95;stroke-width:2.4}
.kc-edge.dim{opacity:.06}
.kc-etype{font-family:var(--mono);font-size:10.5px;font-weight:600;text-anchor:middle;paint-order:stroke;stroke:var(--bg);stroke-width:3px;stroke-linejoin:round}
.kc-fo{overflow:visible}
.kc-node{box-sizing:border-box;height:100%;display:flex;align-items:center;gap:9px;background:rgba(17,24,39,.92);border:1px solid var(--border-2);border-left:4px solid var(--border-2);border-radius:11px;padding:8px 11px;cursor:grab;box-shadow:0 2px 8px rgba(0,0,0,.3);transition:border-color .12s,box-shadow .12s,opacity .12s}
.kc-node:hover{border-color:var(--accent)}
.kc-node.grabbing{cursor:grabbing}
.kc-node.lit{border-color:var(--accent)}
.kc-node.hub{box-shadow:0 0 0 1px var(--accent) inset,0 6px 18px rgba(0,0,0,.4)}
.kc-node.scenario{border-style:dashed}
.kc-node.dim{opacity:.24}
.kc-dot{width:10px;height:10px;border-radius:50%;flex:0 0 auto}
.kc-title{font-family:var(--sans);font-size:12px;font-weight:600;line-height:1.22;color:var(--text);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.kc-badge{margin-left:auto;flex:0 0 auto;font-family:var(--mono);font-size:11px;font-weight:600;color:var(--text-dim);background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:999px;padding:1px 7px;min-width:20px;text-align:center}
.kc-node.hub .kc-badge{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.kc-edgekey{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:13px;font-size:12px;color:var(--text-soft)}
.kc-edgekey .ek-grp{display:flex;flex-direction:column;gap:7px}
.kc-edgekey-h{font-family:var(--mono);font-weight:700;font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim)}
.kc-edgekey .ek-row{display:flex;flex-wrap:wrap;gap:7px 18px}
.kc-edgekey .ek{display:inline-flex;align-items:center;gap:7px}
.kc-edgekey .ek b{color:var(--text);font-weight:700}
.kc-edgekey .ek .ek-def{color:var(--text-dim)}
.kc-edgekey .ek-line{width:20px;height:3px;border-radius:2px;background:currentColor;display:inline-block;flex:none}
.kc-edgekey .ek-line.dashed{height:0;background:none;border-top:2.5px dashed currentColor}

/* ===== notes-by-layer list ===== */
.layer{margin:0 0 22px}
.layer h3{font-size:1.02rem;margin:0 0 .4em;border-bottom:1px solid var(--border);padding-bottom:6px;letter-spacing:-.4px}
.layer h3 .ct{font-family:var(--mono);font-size:.7rem;color:var(--text-dim);font-weight:600}
.layer.empty p{color:var(--text-dim);font-size:.82rem;margin:.2em 0}
.layer ul{margin:0;padding-left:0;list-style:none}
.layer li{margin:5px 0;display:flex;gap:10px;flex-wrap:wrap;align-items:flex-start}
.layer li .tg{font-family:var(--mono);font-size:.7rem;color:var(--text-dim)}
.layer li .csum{flex:1 1 320px;min-width:240px;font-size:.8rem;line-height:1.45;color:var(--text-dim)}

/* ===== in-page note reader (overlay) ===== */
.layer li a{cursor:pointer}
/* reader overlay + markdown typography moved to assets/reader.css (linked by pages that load reader.js) */