/* nrdyn 3D landing — Apple-inspired editorial scroll */

:root {
  --bg: #050507;
  --bg-2: #0a0a0d;
  --fg: #f5f5f7;
  --fg-muted: rgba(245, 245, 247, 0.62);
  --fg-dim: rgba(245, 245, 247, 0.42);
  --line: rgba(255, 255, 255, 0.08);
  --accent: #7A8BFF;
  --accent-2: #FFB07A;
  --max: 1280px;
  --pad: clamp(20px, 4vw, 64px);
  --font-display: "Helvetica Neue", Helvetica, Arial, "system-ui", sans-serif;
  --font-body: "Helvetica Neue", Helvetica, Arial, "system-ui", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-editorial: "Instrument Serif", "Times New Roman", Georgia, serif;
}

html.theme-light {
  --bg: #f5f5f7;
  --bg-2: #ffffff;
  --fg: #050507;
  --fg-muted: rgba(5, 5, 7, 0.62);
  --fg-dim: rgba(5, 5, 7, 0.42);
  --line: rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

/* ─── Fixed canvas backdrop ─── */
.scene-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.scene-stage canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Soft vignette / atmosphere */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, transparent 0%, transparent 50%, var(--bg) 100%),
    radial-gradient(ellipse 40% 30% at 50% 50%, color-mix(in oklab, var(--accent) 18%, transparent) 0%, transparent 70%);
  mix-blend-mode: normal;
  transition: background 600ms ease;
}

/* ─── Top nav ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--pad);
  font-size: 13px;
  letter-spacing: -0.005em;
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  background: color-mix(in oklab, var(--bg) 55%, transparent);
  border-bottom: 0.5px solid var(--line);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 16px;
}
.nav-brand .mark {
  width: 24px; height: 24px;
  border-radius: 7px;
  background: conic-gradient(from 140deg, var(--accent), var(--accent-2), var(--accent));
  position: relative;
  box-shadow: 0 0 24px color-mix(in oklab, var(--accent) 50%, transparent);
}
.nav-brand .mark::after {
  content: "";
  position: absolute; inset: 5px;
  border-radius: 4px;
  background: var(--bg);
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 200ms ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-cta {
  font-family: var(--font-body);
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: transform 200ms ease, opacity 200ms ease;
  border: 0;
  cursor: pointer;
}
.nav-cta:hover { transform: scale(1.03); opacity: 0.95; }

/* ─── Sections ─── */
section { position: relative; z-index: 2; }

.hero {
  min-height: 100svh;
  padding: 100px var(--pad) 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 0.5px solid var(--line);
  background: color-mix(in oklab, var(--bg) 50%, transparent);
  backdrop-filter: blur(10px);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 132px);
  line-height: 0.94;
  letter-spacing: -0.045em;
  max-width: 18ch;
  margin-bottom: 28px;
}
.hero h1 .accent {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 60%, var(--accent) 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 8s ease-in-out infinite;
  display: inline-block;
  font-family: var(--font-editorial);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
}
@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero p.lede {
  max-width: 56ch;
  font-size: clamp(17px, 1.4vw, 21px);
  color: var(--fg-muted);
  margin-bottom: 40px;
  letter-spacing: -0.005em;
}
.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  font-family: var(--font-body);
  font-size: 15px;
  padding: 14px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: transform 200ms ease, background 200ms ease, border-color 200ms ease;
  border: 0.5px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover { transform: scale(1.03); }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--line);
  background: color-mix(in oklab, var(--bg) 30%, transparent);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { border-color: color-mix(in oklab, var(--fg) 30%, transparent); }
.btn .arrow {
  transition: transform 200ms ease;
}
.btn:hover .arrow { transform: translateX(3px); }

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.scroll-hint .line {
  width: 1px; height: 32px;
  background: linear-gradient(to bottom, var(--fg-dim), transparent);
  animation: scrollLine 2.4s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0.2); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0.2); transform-origin: bottom; }
}

/* ─── Marquee strip ─── */
.strip {
  padding: 56px 0;
  border-top: 0.5px solid var(--line);
  border-bottom: 0.5px solid var(--line);
  overflow: hidden;
  background: color-mix(in oklab, var(--bg-2) 80%, transparent);
  backdrop-filter: blur(10px);
}
.strip-track {
  display: flex;
  gap: 56px;
  animation: marquee 50s linear infinite;
  white-space: nowrap;
  font-family: var(--font-editorial);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(34px, 4.6vw, 64px);
  line-height: 1;
  letter-spacing: -0.015em;
  color: var(--fg);
}
.strip-track span { display: inline-flex; align-items: center; gap: 28px; }
.strip-track em { font-style: italic; }
.strip-track .sep {
  color: var(--accent);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.42em;
  letter-spacing: 0;
  transform: translateY(-0.15em);
  opacity: 0.7;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ─── Section heading ─── */
.section-head {
  max-width: var(--max);
  margin: 0 auto;
  padding: 140px var(--pad) 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: end;
}
.section-head .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-head .eyebrow::before {
  content: ""; width: 24px; height: 1px; background: var(--accent);
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(36px, 5.5vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  max-width: 16ch;
}
.section-head h2 em {
  font-style: italic;
  font-weight: 300;
  color: var(--fg-muted);
}
.section-head .lede {
  font-size: clamp(15px, 1.2vw, 18px);
  color: var(--fg-muted);
  max-width: 44ch;
  align-self: end;
  padding-bottom: 8px;
}

/* ─── Capability grid ─── */
.cap-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad) 140px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* Featured AI card — spans both columns */
.cap-feature {
  grid-column: 1 / -1;
  min-height: 480px;
  padding: 48px;
  background:
    radial-gradient(ellipse 80% 100% at 85% 50%, color-mix(in oklab, var(--accent) 16%, transparent), transparent 70%),
    color-mix(in oklab, var(--bg-2) 88%, transparent);
  border: 0.5px solid color-mix(in oklab, var(--accent) 25%, var(--line));
}
.cap-feature::before { opacity: 0.5; }
.cap-feature:hover::before { opacity: 1; }
.cap-feature-body {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  height: 100%;
}
.cap-feature-text { display: flex; flex-direction: column; gap: 18px; }
.cap-feature-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 3.8vw, 48px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.cap-feature-title em {
  font-family: var(--font-editorial);
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cap-feature p {
  color: var(--fg-muted);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.55;
  max-width: 48ch;
}
.cap-feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 0;
}
.cap-feature-bullets li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  color: var(--fg-muted);
  font-size: 14px;
  letter-spacing: -0.005em;
}
.cap-feature-bullets li span {
  color: var(--accent);
  font-size: 9px;
  transform: translateY(-2px);
}
.cap-feature-cta { align-self: flex-start; margin-top: 4px; }
.cap-feature-vis {
  position: relative;
  height: 100%;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cap-feature-tag {
  position: absolute;
  top: 24px; right: 28px;
  font-family: var(--font-editorial);
  font-style: italic;
  font-size: 17px;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.glyph-ai-large { width: 100%; max-width: 360px; height: auto; }
.cap {
  position: relative;
  padding: 36px;
  border-radius: 22px;
  border: 0.5px solid var(--line);
  background: color-mix(in oklab, var(--bg-2) 85%, transparent);
  backdrop-filter: blur(20px);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transition: transform 400ms cubic-bezier(0.2, 0.7, 0.2, 1), border-color 400ms ease;
}
.cap:hover {
  transform: translateY(-2px);
  border-color: color-mix(in oklab, var(--fg) 18%, transparent);
}
.cap::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 22px;
  padding: 1px;
  background: linear-gradient(135deg, color-mix(in oklab, var(--accent) 50%, transparent), transparent 50%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 400ms ease;
  pointer-events: none;
}
.cap:hover::before { opacity: 1; }
.cap-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
}
.cap-vis {
  height: 120px;
  margin: 24px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.cap-vis svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
.cap h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.cap p {
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: -0.005em;
}

/* SVG glyph animations */
.glyph-net circle, .glyph-net line {
  stroke: var(--accent);
  stroke-width: 1;
  fill: none;
}
.glyph-net .node { fill: var(--accent); }
.glyph-net .pulse {
  animation: pulse 3s ease-in-out infinite;
  transform-origin: center;
}
@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.glyph-shield path { stroke: var(--accent); stroke-width: 1.2; fill: none; }
.glyph-shield .check { stroke-dasharray: 30; stroke-dashoffset: 30; animation: drawCheck 3s ease forwards infinite; }
@keyframes drawCheck {
  0%, 30% { stroke-dashoffset: 30; }
  60%, 100% { stroke-dashoffset: 0; }
}

.glyph-chart rect { fill: var(--accent); transform-origin: bottom; animation: bar 2.4s ease-in-out infinite; }
.glyph-chart rect:nth-child(1) { animation-delay: 0s; }
.glyph-chart rect:nth-child(2) { animation-delay: 0.2s; }
.glyph-chart rect:nth-child(3) { animation-delay: 0.4s; }
.glyph-chart rect:nth-child(4) { animation-delay: 0.6s; }
.glyph-chart rect:nth-child(5) { animation-delay: 0.8s; }
@keyframes bar { 0%, 100% { transform: scaleY(0.4); } 50% { transform: scaleY(1); } }

.glyph-ai .ring {
  stroke: var(--accent);
  stroke-width: 1;
  fill: none;
  transform-origin: center;
  animation: spin 16s linear infinite;
}
.glyph-ai .ring-2 { animation-duration: 22s; animation-direction: reverse; }
.glyph-ai .core { fill: var(--accent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Manifesto / bridge section ─── */
.manifesto {
  max-width: 1180px;
  margin: 0 auto;
  padding: 80px var(--pad) 200px;
  position: relative;
}
.manifesto-quote {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(28px, 4.2vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 24ch;
  margin: 0 auto;
  text-align: center;
}
.manifesto-quote em {
  font-style: italic;
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.manifesto-body {
  max-width: 64ch;
  margin: 56px auto 0;
  text-align: center;
  color: var(--fg-muted);
  font-size: clamp(15px, 1.15vw, 18px);
  line-height: 1.6;
}

/* ─── Advantage list ─── */
.advantages {
  background: var(--bg-2);
  border-top: 0.5px solid var(--line);
  border-bottom: 0.5px solid var(--line);
  padding: 140px 0;
}
.adv-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}
.adv-list {
  margin-top: 60px;
  list-style: none;
}
.adv-item {
  display: grid;
  grid-template-columns: 80px 1fr 1fr 80px;
  gap: 40px;
  align-items: baseline;
  padding: 36px 0;
  border-top: 0.5px solid var(--line);
  transition: padding 400ms ease;
  cursor: default;
}
.adv-item:last-child { border-bottom: 0.5px solid var(--line); }
.adv-item:hover { padding-left: 12px; }
.adv-item .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
}
.adv-item h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.adv-item p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.5;
  max-width: 48ch;
}
.adv-item .arrow-icon {
  justify-self: end;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 0.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--fg-muted);
  transition: transform 300ms ease, background 300ms ease, color 300ms ease;
}
.adv-item:hover .arrow-icon {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  transform: rotate(-45deg);
}

/* ─── CTA ─── */
.cta {
  padding: 200px var(--pad);
  text-align: center;
  position: relative;
}
.cta h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(42px, 7vw, 100px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  max-width: 14ch;
  margin: 0 auto 32px;
}
.cta h2 em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cta p {
  color: var(--fg-muted);
  font-size: clamp(16px, 1.3vw, 19px);
  max-width: 56ch;
  margin: 0 auto 48px;
}
.cta-mail {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 32px;
  letter-spacing: 0.04em;
}
.cta-mail a { color: var(--fg); text-decoration: none; border-bottom: 0.5px solid var(--line); }

/* ─── Footer ─── */
footer {
  border-top: 0.5px solid var(--line);
  padding: 36px var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
  position: relative;
  z-index: 2;
}

/* ─── Reveal on scroll ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 900ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 900ms cubic-bezier(0.2, 0.7, 0.2, 1);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ─── Responsive ─── */
@media (max-width: 800px) {
  .nav-links { display: none; }
  .section-head { grid-template-columns: 1fr; gap: 20px; padding-top: 100px; }
  .cap-grid { grid-template-columns: 1fr; }
  .cap-feature { padding: 32px; min-height: 0; }
  .cap-feature-body { grid-template-columns: 1fr; gap: 24px; }
  .cap-feature-vis { min-height: 200px; }
  .adv-item { grid-template-columns: 48px 1fr; }
  .adv-item p { grid-column: 2; }
  .adv-item .arrow-icon { display: none; }
}