/* brainstorm.co — personal R&D site.
   Rebuilt from the May 2026 brainstorm.co design (dark "Instrument Console" variant of the
   brainstormhive company pages): graphite surfaces, grain, colour orbs, mono display type,
   numbered section headers, glow cards, amber→info accents. */
:root {
  --surface-0: #08090B;
  --surface-1: #0F1013;
  --surface-2: #15171B;
  --surface-3: #1C1E23;
  --border: rgba(232, 236, 244, 0.07);
  --border-strong: rgba(232, 236, 244, 0.12);
  --border-emph: rgba(232, 236, 244, 0.2);
  --fg: #E8ECF4;
  --fg-muted: #B2B7C2;
  --fg-subtle: #858B96;
  --fg-faint: #4E535C;
  --amber: #D97706;
  --amber-soft: #F0A23B;
  --amber-dim: rgba(217, 119, 6, 0.12);
  --info: #7FA8D4;
  --purple: #AB9DBB;
  --cyan: #74B9C6;
  --ok: #7EC89C;
  --mono: "JetBrains Mono", "SF Mono", Menlo, monospace;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Fraunces", Georgia, serif;
  --shadow-panel: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 20px 50px -20px rgba(0, 0, 0, 0.7);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--surface-0); color-scheme: dark; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--surface-0);
  color: var(--fg);
  font: 400 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--info); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip:focus { position: fixed; top: 1rem; left: 1rem; z-index: 100; width: auto; height: auto; clip: auto; background: var(--surface-2); padding: .5rem 1rem; border: 1px solid var(--border-strong); border-radius: 6px; }

/* Film grain over everything */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 90; pointer-events: none; opacity: .05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1.5rem; }
.mono { font-family: var(--mono); }

/* Scroll progress */
.scroll-progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; z-index: 60; background: linear-gradient(90deg, var(--amber), var(--info)); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(8, 9, 11, .7); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 3.5rem; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 600; font-size: .9rem; letter-spacing: -.01em; }
.brand i { width: .5rem; height: .5rem; border-radius: 50%; background: var(--amber); box-shadow: 0 0 12px rgba(217, 119, 6, .6); }
.nav nav { display: flex; gap: 1.75rem; }
.nav nav a { font-size: .875rem; color: var(--fg-muted); transition: color .2s; }
.nav nav a:hover, .nav nav a[aria-current="page"] { color: var(--fg); }
.link-slide { background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .3s, color .2s; padding-bottom: 1px; }
.link-slide:hover { background-size: 100% 1px; }

/* Orbs and glows */
.orb { position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none; opacity: .5; animation: orb-float 18s ease-in-out infinite; }
.orb-blue { background: radial-gradient(circle, rgba(127, 168, 212, .35), transparent 65%); }
.orb-purple { background: radial-gradient(circle, rgba(171, 157, 187, .3), transparent 65%); animation-delay: -6s; }
.orb-cyan { background: radial-gradient(circle, rgba(116, 185, 198, .25), transparent 65%); animation-delay: -12s; }
.orb-amber { background: radial-gradient(circle, rgba(217, 119, 6, .22), transparent 65%); }
@keyframes orb-float { 0%, 100% { transform: translate(0, 0) scale(1); } 33% { transform: translate(30px, -20px) scale(1.05); } 66% { transform: translate(-20px, 25px) scale(.97); } }
.conic-glow {
  border-radius: 50%; opacity: .55;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(217, 119, 6, .14) 60deg, transparent 120deg, rgba(127, 168, 212, .12) 200deg, transparent 260deg, rgba(171, 157, 187, .12) 320deg, transparent 360deg);
  -webkit-mask: radial-gradient(circle, transparent 38%, #000 40%, #000 62%, transparent 72%);
          mask: radial-gradient(circle, transparent 38%, #000 40%, #000 62%, transparent 72%);
  animation: spin 40s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Hero */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; overflow: hidden; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }
.hero .conic-wrap { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.hero .inner { position: relative; z-index: 10; width: 100%; padding: 5rem 1.5rem 4rem; max-width: 72rem; margin: 0 auto; }
.hero .fade { position: absolute; left: 0; right: 0; bottom: 0; height: 10rem; background: linear-gradient(to top, var(--surface-0), transparent); z-index: 5; pointer-events: none; }
.badge { display: inline-flex; align-items: center; gap: .55rem; font: 400 .75rem/1 var(--mono); color: var(--fg-muted); border: 1px solid var(--border-strong); background: rgba(21, 23, 27, .6); border-radius: 999px; padding: .5rem .9rem; margin-bottom: 1.75rem; }
.status-dot { width: .4rem; height: .4rem; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 0 rgba(217, 119, 6, .5); animation: ping 2.4s ease-out infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(217, 119, 6, .55); } 80%, 100% { box-shadow: 0 0 0 7px rgba(217, 119, 6, 0); } }
.heading-page { font: 700 clamp(2.3rem, 6.2vw, 4.7rem)/1.06 var(--mono); letter-spacing: -.035em; color: var(--fg); max-width: 18ch; margin-bottom: 2rem; perspective: 600px; }
.hero-word { display: inline-block; opacity: 0; transform: translateY(.45em) rotateX(-35deg); transform-origin: 50% 100%; animation: word-in .8s cubic-bezier(.2, .7, .2, 1) forwards; }
@keyframes word-in { to { opacity: 1; transform: none; } }
.gradient-text { background: linear-gradient(100deg, var(--amber-soft) 0%, var(--amber) 35%, var(--info) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: 1.125rem; line-height: 1.7; color: var(--fg-muted); max-width: 40rem; margin-bottom: 2rem; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.pill-btn { display: inline-flex; align-items: center; gap: .5rem; font: 500 .8125rem/1 var(--mono); border-radius: 999px; padding: .9rem 1.4rem; transition: transform .2s, border-color .2s, background .2s, color .2s; }
.pill-btn:hover { transform: translateY(-1px); }
.pill-btn-primary { background: var(--fg); color: var(--surface-0); }
.pill-btn-primary:hover { background: #fff; }
.pill-btn-outline { border: 1px solid var(--border-strong); color: var(--fg); background: rgba(21, 23, 27, .5); }
.pill-btn-outline:hover { border-color: var(--border-emph); }
.quicklinks { display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; margin-top: 2rem; font-size: .875rem; color: var(--fg-subtle); }
.quicklinks a:hover { color: var(--fg); }

/* Stats band */
.stats { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 2.5rem 0; }
.stats .wrap { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1.5rem; }
.stats-4 .wrap { grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 56rem; }
.stat { text-align: center; }
.stat b { display: block; font: 700 1.875rem/1.15 var(--mono); color: var(--fg); font-variant-numeric: tabular-nums; }
.stat i { display: block; width: 2rem; height: 2px; margin: .4rem auto 0; border-radius: 2px; background: linear-gradient(90deg, var(--amber), var(--info)); opacity: .6; }
.stat span { display: block; margin-top: .4rem; font-size: .75rem; color: var(--fg-muted); text-transform: uppercase; letter-spacing: .06em; }

/* Sections */
.section { position: relative; padding: 7rem 0; }
.section-glow-top::before { content: ""; position: absolute; top: 0; left: 50%; width: min(48rem, 90%); height: 1px; transform: translateX(-50%); background: linear-gradient(90deg, transparent, rgba(217, 119, 6, .45), rgba(127, 168, 212, .4), transparent); }
.section-header { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--border); padding-bottom: .75rem; margin-bottom: 3rem; font: 400 .6875rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--fg-subtle); }
.section-header-number { color: var(--fg-faint); }
.heading-section { font: 700 clamp(1.8rem, 3.6vw, 2.75rem)/1.12 var(--mono); letter-spacing: -.03em; color: var(--fg); margin-bottom: 1.5rem; }
.section-intro { max-width: 48rem; margin-bottom: 3.5rem; }
.section-intro p { font-size: 1.125rem; line-height: 1.7; color: var(--fg-muted); }
.section-intro p + p { margin-top: 1rem; }

/* Glow cards */
.cards { display: grid; gap: 1.25rem; }
.cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.glow-card {
  position: relative; display: block; overflow: hidden; border-radius: 14px; padding: 2rem;
  background: linear-gradient(180deg, rgba(28, 30, 35, .65), rgba(15, 16, 19, .85));
  border: 1px solid var(--border-strong); box-shadow: var(--shadow-panel);
  transition: border-color .3s, transform .25s ease-out;
}
.glow-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(217, 119, 6, .11), transparent 45%);
}
.glow-card:hover { border-color: var(--border-emph); }
.glow-card:hover::before { opacity: 1; }
.glow-card > * { position: relative; }
.card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.icon-box { display: inline-flex; padding: .75rem; border-radius: 12px; border: 1px solid var(--border-strong); background: rgba(232, 236, 244, .04); }
.icon-box.amber { background: var(--amber-dim); border-color: rgba(217, 119, 6, .3); }
.icon-box.purple { background: rgba(171, 157, 187, .1); border-color: rgba(171, 157, 187, .3); }
.tag { font: 400 .625rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-subtle); border: 1px solid var(--border-strong); border-radius: 999px; padding: .4rem .65rem; }
.kicker { font: italic 400 1.125rem/1.3 var(--display); color: var(--fg-muted); margin-bottom: .5rem; }
.glow-card h3 { font: 700 1.25rem/1.25 var(--mono); color: var(--fg); margin-bottom: .75rem; transition: color .2s; }
a.glow-card:hover h3 { color: var(--amber-soft); }
.glow-card p.desc { font-size: .875rem; line-height: 1.65; color: var(--fg-muted); margin-bottom: 1.25rem; }
.glow-card .meta { font: 400 .75rem/1.4 var(--mono); letter-spacing: .04em; color: var(--amber); }
.glow-card.small { padding: 1.75rem; }
.glow-card.small h3 { font: 600 1rem/1.3 var(--sans); margin-bottom: .5rem; }
.glow-card.small p { font-size: .875rem; line-height: 1.65; color: var(--fg-muted); }
.glow-card.small .icon-box { margin-bottom: 1.1rem; }

/* Flywheel */
.flywheel-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 3rem; align-items: center; }
.flywheel { max-width: 30rem; width: 100%; margin: 0 auto; aspect-ratio: 1; }
.flywheel svg { width: 100%; height: 100%; overflow: visible; }
@keyframes dash-flow { to { stroke-dashoffset: -28; } }
@keyframes pulse-glow { 0%, 100% { filter: drop-shadow(0 0 0 transparent); } 50% { filter: drop-shadow(0 0 10px var(--glow-color)); } }
.loop-steps { list-style: none; display: grid; gap: 1.5rem; }
.loop-steps li { display: grid; grid-template-columns: 2.25rem minmax(0, 1fr); gap: 1rem; }
.loop-steps .dot { width: 2.25rem; height: 2.25rem; border-radius: 50%; display: grid; place-items: center; font: 700 .75rem/1 var(--mono); color: var(--surface-0); }
.loop-steps h3 { font: 600 1rem/1.4 var(--mono); color: var(--fg); margin-bottom: .25rem; }
.loop-steps p { font-size: .9375rem; line-height: 1.65; color: var(--fg-muted); }

/* Terminal panel */
.terminal { border-radius: 14px; border: 1px solid var(--border-strong); background: var(--surface-1); box-shadow: var(--shadow-panel); overflow: hidden; }
.terminal-bar { display: flex; align-items: center; gap: .45rem; padding: .8rem 1rem; border-bottom: 1px solid var(--border); font: 400 .75rem/1 var(--mono); color: var(--fg-subtle); }
.terminal-bar i { width: .6rem; height: .6rem; border-radius: 50%; background: var(--surface-3); }
.terminal-bar span { margin-left: .5rem; }
.terminal ol { list-style: none; }
.terminal li { display: grid; grid-template-columns: 3.6rem minmax(0, 16rem) minmax(0, 1fr); gap: 1rem; align-items: baseline; padding: .85rem 1.1rem; border-top: 1px solid var(--border); font-size: .875rem; }
.terminal li:first-child { border-top: 0; }
.verb { font: 500 .75rem/1.5 var(--mono); color: var(--info); }
.verb.post { color: var(--amber-soft); }
.path { font: 400 .8125rem/1.5 var(--mono); color: var(--fg); overflow-wrap: anywhere; }
.what { color: var(--fg-subtle); }

/* Approval ladder */
.ladder { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .75rem; margin-top: 1.25rem; }
.rung { border-radius: 12px; border: 1px solid var(--border-strong); background: rgba(21, 23, 27, .6); padding: 1.1rem 1rem; }
.rung b { display: block; font: 600 .8125rem/1.3 var(--mono); color: var(--fg); margin-bottom: .45rem; }
.rung b::before { content: ""; display: inline-block; width: .45rem; height: .45rem; border-radius: 50%; margin-right: .5rem; vertical-align: .05em; background: var(--fg-faint); }
.rung.l2 b::before { background: var(--info); }
.rung.l3 b::before { background: #D4B76A; }
.rung.l4 b::before, .rung.l5 b::before { background: #D4675A; }
.rung span { font-size: .8125rem; line-height: 1.5; color: var(--fg-muted); }

/* Chart (LLM) */
.chart { border-radius: 14px; border: 1px solid var(--border-strong); background: var(--surface-1); padding: 1.75rem; box-shadow: var(--shadow-panel); }
.chart-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font: 400 .75rem/1.3 var(--mono); color: var(--fg-subtle); margin-bottom: 1.5rem; }
.bar { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr) 3.5rem; gap: 1rem; align-items: center; padding: .55rem 0; }
.bar .name { font: 400 .8125rem/1 var(--mono); color: var(--fg-muted); }
.bar .track { position: relative; height: .6rem; border-radius: 99px; background: var(--surface-3); }
.bar .fill { position: absolute; inset: 0 auto 0 0; border-radius: 99px; background: linear-gradient(90deg, rgba(127, 168, 212, .55), var(--info)); transform-origin: left; transform: scaleX(0); transition: transform 1.1s cubic-bezier(.2, .7, .2, 1); }
.bar.mean .fill { background: linear-gradient(90deg, var(--amber), var(--amber-soft)); }
.bar.mean .name, .bar.mean .val { color: var(--fg); font-weight: 600; }
.revealed .bar .fill { transform: scaleX(1); }
.bar .gate { position: absolute; top: -.45rem; bottom: -.45rem; left: 75%; width: 1px; background: var(--ok); box-shadow: 0 0 8px rgba(126, 200, 156, .6); }
.bar .val { font: 400 .8125rem/1 var(--mono); color: var(--fg-muted); text-align: right; }
.chart-key { margin-top: 1.25rem; display: flex; align-items: center; gap: .6rem; font: 400 .75rem/1 var(--mono); color: var(--fg-subtle); }
.chart-key i { width: 1px; height: .9rem; background: var(--ok); box-shadow: 0 0 6px rgba(126, 200, 156, .7); }

.gates { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.gates th, .gates td { text-align: left; padding: .95rem 1rem .95rem 0; border-bottom: 1px solid var(--border); vertical-align: baseline; }
.gates th { font: 400 .6875rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-subtle); }
.gates td { color: var(--fg-muted); }
.gates td.num { font-family: var(--mono); color: var(--fg); white-space: nowrap; }
.pass { display: inline-flex; align-items: center; gap: .45rem; font: 500 .75rem/1 var(--mono); color: var(--ok); }
.pass::before { content: ""; width: .4rem; height: .4rem; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(126, 200, 156, .14); }

/* Closing */
.closing { position: relative; overflow: hidden; padding: 8rem 0; text-align: center; border-top: 1px solid var(--border); }
.closing .wrap { position: relative; z-index: 2; max-width: 46rem; }
.closing p { font-size: 1.125rem; line-height: 1.7; color: var(--fg-muted); margin-bottom: 2rem; }
.closing .actions { justify-content: center; }

footer { border-top: 1px solid var(--border); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem 2rem; padding-top: 2rem; padding-bottom: 2.25rem; font-size: .8125rem; color: var(--fg-subtle); }
footer a { color: var(--fg-muted); }
footer a:hover { color: var(--fg); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1); }
.reveal.revealed { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; } .reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; } .reveal-delay-4 { transition-delay: .32s; }
.no-js .reveal { opacity: 1; transform: none; }

@media (max-width: 960px) {
  .cards-3, .flywheel-grid { grid-template-columns: minmax(0, 1fr); }
  .cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats .wrap { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 2rem; }
  .stats-4 .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ladder { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .nav nav { gap: 1rem; }
  .nav nav a.hide-sm { display: none; }
  .section { padding: 5rem 0; }
  .cards-4 { grid-template-columns: minmax(0, 1fr); }
  .glow-card { padding: 1.5rem; }
  .terminal li { grid-template-columns: 3rem minmax(0, 1fr); gap: .2rem .75rem; }
  .terminal .what { grid-column: 2; }
  .ladder { grid-template-columns: minmax(0, 1fr); }
  .bar { grid-template-columns: 5rem minmax(0, 1fr) 3rem; gap: .6rem; }
  .gates th:nth-child(2), .gates td:nth-child(2) { display: none; }
  .hero { min-height: auto; }
  .hero .inner { padding-top: 4rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .hero-word, .reveal { opacity: 1; transform: none; }
  .bar .fill { transform: scaleX(1); }
  html { scroll-behavior: auto; }
}