:root {
  --ink: #080b0f;
  --panel: #0d1117;
  --panel-2: #121821;
  --line: rgba(229, 237, 242, 0.14);
  --line-strong: rgba(229, 237, 242, 0.26);
  --text: #eef3f5;
  --muted: #9ba8af;
  --accent: #d9ff57;
  --accent-soft: rgba(217, 255, 87, 0.12);
  --cyan: #6fd6d0;
  --max: 1240px;
  --pad: clamp(1.25rem, 4vw, 4rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 100;
  left: 1rem;
  top: -5rem;
  background: var(--accent);
  color: var(--ink);
  padding: .7rem 1rem;
  font-weight: 800;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease;
}
.site-header.scrolled {
  background: rgba(8, 11, 15, .86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  font-size: .9rem;
  font-weight: 850;
  letter-spacing: .18em;
}
.brand-mark {
  width: 27px;
  height: 27px;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  transform: skew(-8deg);
}
.brand-mark i { display: block; background: var(--accent); }
.brand-mark i:nth-child(1) { height: 100%; }
.brand-mark i:nth-child(2) { height: 72%; align-self: end; }
.brand-mark i:nth-child(3) { height: 42%; align-self: end; }
.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav a {
  color: #b6c0c5;
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .11em;
  text-transform: uppercase;
  transition: color .2s ease;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--text); }
.site-nav .nav-cta {
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: .58rem .9rem;
}
.menu-button { display: none; }

.hero {
  min-height: 100svh;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr);
  align-items: center;
  gap: clamp(2.5rem, 5vw, 6rem);
  padding: 8.5rem var(--pad) 5rem;
  max-width: calc(var(--max) + var(--pad) * 2);
  margin: 0 auto;
}
.hero-grid {
  position: absolute;
  z-index: -1;
  inset: 0 -50vw;
  background-image:
    linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, black 18%, black 70%, transparent);
}
.hero-grid::after {
  content: "";
  position: absolute;
  width: 36rem;
  height: 36rem;
  right: 13%;
  top: 15%;
  border-radius: 50%;
  background: rgba(53, 142, 145, .13);
  filter: blur(100px);
}
.eyebrow, .section-number, .workspace-label, .window-brand, .window-state {
  font-size: .72rem;
  line-height: 1;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.eyebrow { color: #bdc7cb; display: flex; align-items: center; gap: .65rem; margin-bottom: 2rem; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 16px rgba(217,255,87,.8); }
.hero h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(4rem, 7.3vw, 7.4rem);
  line-height: .86;
  letter-spacing: -.065em;
  font-weight: 680;
}
.hero h1 em { color: var(--accent); font-style: normal; }
.hero-lead {
  max-width: 610px;
  margin: 2.25rem 0 0;
  color: #b8c2c7;
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  line-height: 1.65;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2.25rem; }
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.8rem;
  padding: .8rem 1.2rem;
  border: 1px solid var(--line-strong);
  font-size: .78rem;
  font-weight: 820;
  letter-spacing: .07em;
  text-transform: uppercase;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); color: #0b0e0f; border-color: var(--accent); }
.button-primary:hover { background: #e5ff82; }
.button-secondary:hover { border-color: var(--text); }
.hero-note { color: #66747b; font-size: .78rem; margin-top: 1.15rem; }

.system-window {
  position: relative;
  width: 100%;
  border: 1px solid var(--line-strong);
  background: rgba(10, 14, 19, .88);
  box-shadow: 0 40px 100px rgba(0,0,0,.42);
  transform: perspective(1400px) rotateY(-3deg) rotateX(1deg);
}
.system-window::before {
  content: "";
  position: absolute;
  inset: 12px -13px -13px 12px;
  border: 1px solid rgba(217,255,87,.2);
  z-index: -1;
}
.window-bar {
  height: 44px;
  padding: 0 1rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #75838a;
}
.window-brand { display: flex; align-items: center; gap: .5rem; }
.mini-mark { width: 8px; height: 8px; background: var(--accent); transform: skew(-8deg); }
.window-state { color: #8fa866; font-size: .61rem; }
.window-state span { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); margin-right: .3rem; }
.window-body { min-height: 475px; display: grid; grid-template-columns: 50px 1fr; }
.workspace-rail { padding: 1rem 0; border-right: 1px solid var(--line); display: flex; flex-direction: column; align-items: center; gap: 1.25rem; }
.rail-dot { width: 11px; height: 11px; border: 1px solid #58656d; transform: rotate(45deg); }
.rail-dot.active { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 15px rgba(217,255,87,.25); }
.rail-dot.small { width: 7px; height: 7px; }
.rail-line { flex: 1; width: 1px; background: var(--line); }
.workspace-main { padding: clamp(1.4rem, 3vw, 2.25rem); }
.workspace-label { color: #68767d; margin-bottom: .75rem; }
.workspace-main h2 { margin: 0; max-width: 410px; font-size: clamp(1.75rem, 3vw, 2.7rem); line-height: 1.07; letter-spacing: -.035em; }
.context-row { display: flex; flex-wrap: wrap; gap: 1.25rem; color: #728087; font-size: .72rem; margin-top: 1rem; }
.context-row span::before { content: "◇"; color: var(--cyan); margin-right: .35rem; }
.task-stack { display: grid; gap: .55rem; margin-top: 2rem; }
.task-card {
  min-height: 68px;
  display: grid;
  grid-template-columns: 32px 1fr auto;
  align-items: center;
  gap: .8rem;
  padding: .8rem 1rem;
  border: 1px solid var(--line);
  color: #aab5ba;
}
.task-card.active { border-color: rgba(217,255,87,.35); background: linear-gradient(90deg, var(--accent-soft), transparent 60%); color: var(--text); }
.task-index { color: #56636a; font: 700 .67rem ui-monospace, monospace; }
.task-card b, .task-card small { display: block; }
.task-card b { font-size: .84rem; }
.task-card small { color: #69777e; margin-top: .15rem; font-size: .68rem; }
.task-status { color: var(--accent); }
.task-pulse { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 6px rgba(217,255,87,.09); }
.task-lock { color: #68767d; }
.decision-strip { display: grid; grid-template-columns: 1fr auto; gap: .2rem 1rem; margin-top: 1.3rem; padding: 1rem; border-left: 2px solid var(--cyan); background: rgba(111,214,208,.055); }
.decision-strip > span:first-child { color: #6f7d84; font-size: .61rem; font-weight: 800; letter-spacing: .12em; }
.decision-strip strong { grid-row: 2; font-size: .9rem; }
.decision-score { grid-row: 2; grid-column: 2; color: #6c7a81; font: .67rem ui-monospace, monospace; }

.principle-strip {
  min-height: 78px;
  padding: 1rem var(--pad);
  border-block: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.4rem);
  color: #819097;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
}
.principle-strip i { width: 4px; height: 4px; background: var(--accent); transform: rotate(45deg); }

.section { max-width: calc(var(--max) + var(--pad) * 2); margin: 0 auto; padding: clamp(6rem, 10vw, 10rem) var(--pad); }
.section-heading { display: grid; grid-template-columns: minmax(120px, .38fr) 1fr; margin-bottom: clamp(3rem, 6vw, 5rem); }
.section-heading.compact { margin-bottom: 3.5rem; }
.section-number { color: #69777e; padding-top: .65rem; }
.kicker { color: var(--accent); margin: 0 0 1rem; font-size: .8rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; }
.section h2, .access-section h2 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(2.35rem, 5vw, 4.8rem);
  line-height: 1.03;
  font-weight: 600;
  letter-spacing: -.052em;
}
.responsibility-grid { display: grid; grid-template-columns: 1.25fr 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.responsibility-card { min-height: 450px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; background: var(--panel); transition: background .25s ease; }
.responsibility-card:hover { background: var(--panel-2); }
.responsibility-card.featured { background: #10161c; }
.card-number { color: #536168; font: 700 .7rem ui-monospace, monospace; }
.responsibility-card h3 { margin: 0 0 .7rem; font-size: 1.65rem; letter-spacing: -.03em; }
.responsibility-card p { margin: 0; color: #929fa6; line-height: 1.65; }
.memory-visual { display: grid; gap: .45rem; width: 78%; margin: 2.5rem auto; }
.memory-visual span { display: flex; align-items: center; height: 32px; padding: 0 .8rem; background: rgba(255,255,255,.035); border-left: 2px solid #445159; color: #68757c; font-size: .58rem; font-weight: 800; letter-spacing: .12em; }
.memory-visual span:nth-child(1) { width: 73%; }
.memory-visual span:nth-child(2) { width: 100%; border-color: var(--accent); color: #cdd5d8; background: var(--accent-soft); }
.memory-visual span:nth-child(3) { width: 85%; }
.memory-visual span:nth-child(4) { width: 55%; }
.route-visual { min-height: 100px; display: flex; align-items: center; justify-content: center; gap: .55rem; margin: 2.5rem auto; }
.route-source { width: 16px; height: 16px; background: var(--accent); transform: rotate(45deg); }
.route-visual i { height: 1px; width: 42px; background: linear-gradient(90deg, var(--accent), #46535a); }
.route-visual span:not(.route-source) { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line-strong); font: 750 .75rem ui-monospace, monospace; }
.route-visual span:last-child { border-color: rgba(111,214,208,.4); color: var(--cyan); }
.action-visual { display: flex; align-items: center; justify-content: center; margin: 2.5rem auto; }
.action-visual span { color: #839198; font-size: .57rem; font-weight: 800; letter-spacing: .08em; }
.action-visual i { width: 20px; height: 1px; background: #47535a; margin: 0 .4rem; }
.action-visual span:last-child { color: var(--accent); }

.architecture-section { border-top: 1px solid var(--line); }
.architecture-board { border: 1px solid var(--line); display: grid; grid-template-columns: .88fr 1.12fr; background: var(--panel); }
.architecture-copy { padding: clamp(2rem, 5vw, 4rem); border-right: 1px solid var(--line); }
.architecture-copy > p { margin: 0; color: #a7b2b7; font-size: 1.05rem; line-height: 1.8; }
.architecture-points { margin-top: 3rem; border-top: 1px solid var(--line); }
.architecture-points > div { display: grid; grid-template-columns: 35px 1fr; gap: .65rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.architecture-points span { color: #56646b; font: 700 .68rem ui-monospace, monospace; }
.architecture-points p, .architecture-points b { display: block; margin: 0; }
.architecture-points p { color: #79878e; font-size: .82rem; }
.architecture-points b { color: var(--text); margin-bottom: .18rem; font-size: .92rem; }
.routing-diagram { min-height: 560px; position: relative; padding: 3rem; display: flex; flex-direction: column; align-items: center; justify-content: center; background-image: radial-gradient(rgba(255,255,255,.08) .7px, transparent .7px); background-size: 17px 17px; }
.diagram-node { width: 210px; padding: 1rem; border: 1px solid var(--line-strong); background: #0b0f14; display: grid; grid-template-columns: 35px 1fr; }
.diagram-node span, .branch span { grid-row: 1 / 3; color: #5b696f; font: 700 .63rem ui-monospace, monospace; }
.diagram-node b, .branch b { font-size: .76rem; letter-spacing: .1em; }
.diagram-node small, .branch small { color: #65737a; font-size: .67rem; }
.core-node { border-color: rgba(217,255,87,.4); box-shadow: 0 0 35px rgba(217,255,87,.05); }
.core-node b { color: var(--accent); }
.diagram-path { height: 80px; position: relative; display: flex; align-items: center; }
.diagram-path i { display: block; width: 1px; height: 80px; background: linear-gradient(var(--line-strong), var(--accent)); }
.diagram-path small { position: absolute; left: .8rem; color: #57656c; font: .6rem ui-monospace, monospace; }
.diagram-branches { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; margin-top: 80px; }
.diagram-branches::before { content: ""; position: absolute; height: 1px; width: calc(100% - 180px); top: -40px; left: 90px; background: var(--line-strong); }
.branch { position: relative; width: 180px; padding: .8rem; border: 1px solid var(--line-strong); background: #0b0f14; }
.branch > i { position: absolute; width: 1px; height: 40px; background: var(--line-strong); top: -41px; left: 50%; }
.branch > div { display: grid; grid-template-columns: 30px 1fr; }
.branch.local { border-color: rgba(217,255,87,.32); }
.branch.cloud { border-color: rgba(111,214,208,.32); }
.branch.local b { color: var(--accent); }
.branch.cloud b { color: var(--cyan); }
.feedback-line { position: absolute; left: 15%; right: 15%; bottom: 2rem; display: flex; align-items: center; gap: 1rem; color: #5c6a71; font: .58rem ui-monospace, monospace; }
.feedback-line i { flex: 1; height: 1px; background: linear-gradient(90deg, #526068, transparent); }

.status-section { border-top: 1px solid var(--line); }
.status-layout { display: grid; grid-template-columns: 1.35fr .65fr; border: 1px solid var(--line); }
.status-list { padding: 0 clamp(1.2rem, 3vw, 2.2rem); }
.status-item { min-height: 118px; display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 1rem; border-bottom: 1px solid var(--line); }
.status-item:last-child { border-bottom: 0; }
.status-item b { display: block; font-size: 1rem; margin-bottom: .18rem; }
.status-item p { margin: 0; color: #7f8d94; font-size: .83rem; line-height: 1.5; }
.status-symbol { display: grid; place-items: center; width: 18px; height: 18px; }
.status-symbol.complete { color: var(--accent); border: 1px solid rgba(217,255,87,.35); font-size: .64rem; }
.status-symbol.progress { border: 1px solid rgba(111,214,208,.45); border-radius: 50%; }
.status-symbol.progress::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); }
.status-symbol.planned { color: #718087; }
.status-label { color: #617077; font: 700 .62rem ui-monospace, monospace; letter-spacing: .08em; }
.status-statement { padding: clamp(2rem, 4vw, 3rem); border-left: 1px solid var(--line); background: var(--accent); color: #111509; display: flex; flex-direction: column; }
.status-statement > span { font-size: .67rem; font-weight: 850; letter-spacing: .12em; }
.status-statement blockquote { margin: auto 0 1.2rem; font-size: clamp(1.85rem, 3vw, 2.8rem); line-height: 1.05; letter-spacing: -.045em; font-weight: 650; }
.status-statement p { margin: 0; color: rgba(17,21,9,.72); line-height: 1.65; font-size: .88rem; }

.access-section { max-width: var(--max); margin: 0 auto 6rem; padding: clamp(3rem, 7vw, 6rem); border: 1px solid var(--line-strong); background: linear-gradient(115deg, #111820, #0c1116); display: flex; align-items: end; justify-content: space-between; gap: 3rem; }
.access-section .section-number { display: block; padding: 0; margin-bottom: 2rem; }
.access-section h2 { font-size: clamp(2.6rem, 5vw, 5rem); }
.access-section p { max-width: 680px; color: #8c9aa1; font-size: 1rem; margin: 1.25rem 0 0; }
.access-state { min-width: 240px; display: flex; align-items: center; gap: 1rem; padding: 1rem; border: 1px solid var(--line); }
.access-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 7px var(--accent-soft); }
.access-state small, .access-state b { display: block; }
.access-state small { color: #65737a; font-size: .6rem; font-weight: 800; letter-spacing: .12em; }
.access-state b { margin-top: .15rem; font-size: .88rem; }

footer { max-width: calc(var(--max) + var(--pad) * 2); min-height: 110px; margin: 0 auto; padding: 2rem var(--pad); border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; color: #65737a; font-size: .73rem; }
.footer-brand { color: var(--text); }
footer p { margin: 0; text-align: center; }
footer > span { text-align: right; }

@media (max-width: 1000px) {
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 10rem; }
  .hero-copy { max-width: 780px; }
  .system-window { max-width: 760px; justify-self: center; transform: none; }
  .responsibility-grid { grid-template-columns: 1fr 1fr; }
  .responsibility-card.featured { grid-column: 1 / -1; min-height: 400px; }
  .memory-visual { max-width: 520px; }
  .architecture-board { grid-template-columns: 1fr; }
  .architecture-copy { border-right: 0; border-bottom: 1px solid var(--line); }
  .status-layout { grid-template-columns: 1fr; }
  .status-statement { min-height: 350px; border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 760px) {
  .site-header { height: 68px; }
  .menu-button { display: grid; gap: 6px; width: 42px; height: 42px; place-content: center; border: 1px solid var(--line); background: rgba(8,11,15,.9); color: var(--text); }
  .menu-button span:not(.sr-only) { display: block; width: 18px; height: 1px; background: currentColor; transition: transform .2s ease; }
  .menu-button[aria-expanded="true"] span:nth-child(2) { transform: translateY(3.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-3.5px) rotate(-45deg); }
  .site-nav { position: absolute; display: none; top: 68px; left: 0; right: 0; padding: 1rem var(--pad) 1.5rem; flex-direction: column; align-items: stretch; gap: 0; background: rgba(8,11,15,.97); border-bottom: 1px solid var(--line); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 1rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: .75rem; padding: .85rem; text-align: center; }
  .hero { padding-top: 8.5rem; }
  .hero h1 { font-size: clamp(3.7rem, 17vw, 6rem); }
  .system-window::before { display: none; }
  .window-body { grid-template-columns: 36px 1fr; min-height: 440px; }
  .window-state { display: none; }
  .workspace-main { padding: 1.2rem .9rem; }
  .context-row { gap: .6rem; }
  .task-card { grid-template-columns: 23px 1fr auto; padding: .7rem; }
  .decision-strip { grid-template-columns: 1fr; }
  .decision-score { grid-row: 3; grid-column: 1; }
  .principle-strip { justify-content: flex-start; }
  .section-heading { grid-template-columns: 1fr; gap: 1.5rem; }
  .section-number { padding-top: 0; }
  .responsibility-grid { grid-template-columns: 1fr; }
  .responsibility-card.featured { grid-column: auto; }
  .responsibility-card { min-height: 390px; }
  .routing-diagram { min-height: 510px; padding: 1.5rem .8rem; }
  .diagram-branches { gap: 18px; }
  .diagram-branches::before { width: calc(100% - 145px); left: 72px; }
  .branch { width: 145px; }
  .status-item { grid-template-columns: 24px 1fr; padding: 1.2rem 0; }
  .status-label { grid-column: 2; }
  .access-section { margin-inline: var(--pad); padding: 2.5rem 1.5rem; align-items: stretch; flex-direction: column; }
  .access-state { min-width: 0; }
  footer { grid-template-columns: 1fr; text-align: left; }
  footer p, footer > span { text-align: left; }
}

@media (max-width: 390px) {
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .diagram-branches { gap: 8px; }
  .branch { width: 132px; padding: .65rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}