/* Design tokens — NVIDIA green on cool light industrial surface */
:root {
  --bg: #eef1f4;
  --bg-elevated: #f7f8fa;
  --ink: #12151a;
  --ink-soft: #3d4450;
  --muted: #6b7380;
  --line: #c8ced6;
  --line-strong: #9aa3b0;
  --nvidia: #76b900;
  --nvidia-ink: #3d6600;
  --nvidia-wash: rgba(118, 185, 0, 0.12);
  --n8n: #ea4b71;
  --font-display: "Syne", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --space: clamp(1rem, 2vw, 1.5rem);
  --max: 72rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

a {
  color: var(--nvidia-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--ink);
}

/* Subtle technical grid atmosphere */
.page-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(18, 21, 26, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 21, 26, 0.04) 1px, transparent 1px),
    radial-gradient(ellipse 80% 50% at 70% -10%, rgba(118, 185, 0, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 10% 100%, rgba(18, 21, 26, 0.06), transparent 50%);
  background-size: 48px 48px, 48px 48px, 100% 100%, 100% 100%;
  animation: gridDrift 28s linear infinite;
}

@keyframes gridDrift {
  from { background-position: 0 0, 0 0, 0 0, 0 0; }
  to { background-position: 48px 48px, 48px 48px, 0 0, 0 0; }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1.25rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
}

.brand-mark__glyph {
  width: 0.7rem;
  height: 0.7rem;
  background: var(--nvidia);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.brand-mark__text {
  max-width: 14rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav {
  display: none;
  gap: 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--ink);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.85rem;
}

.live-version {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--nvidia-ink);
  background: var(--nvidia-wash);
  padding: 0.25rem 0.55rem;
  border: 1px solid color-mix(in srgb, var(--nvidia) 45%, var(--line));
}

.header-link {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}

.header-link:hover {
  color: var(--ink);
}

@media (min-width: 860px) {
  .site-nav {
    display: flex;
  }
}

/* Hero — full-bleed visual plane */
.hero {
  position: relative;
  min-height: min(92vh, 54rem);
  display: grid;
  align-items: end;
  padding: clamp(4rem, 12vh, 7rem) clamp(1.25rem, 4vw, 3rem) clamp(3rem, 8vh, 5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero__visual {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__mesh {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 35%, rgba(118, 185, 0, 0.22) 35%, rgba(118, 185, 0, 0.22) 36.5%, transparent 36.5%),
    linear-gradient(105deg, transparent 58%, rgba(18, 21, 26, 0.08) 58%, rgba(18, 21, 26, 0.08) 59%, transparent 59%),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 18px,
      rgba(18, 21, 26, 0.035) 18px,
      rgba(18, 21, 26, 0.035) 19px
    );
  animation: meshShift 14s var(--ease) infinite alternate;
}

.hero__signal {
  position: absolute;
  right: -8%;
  top: 12%;
  width: min(52vw, 34rem);
  height: min(52vw, 34rem);
  border: 1px solid color-mix(in srgb, var(--nvidia) 55%, transparent);
  border-radius: 50%;
  opacity: 0.55;
  animation: signalPulse 6s var(--ease) infinite;
}

.hero__signal::before,
.hero__signal::after {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  border-radius: 50%;
}

.hero__signal::after {
  inset: 26%;
  border-color: color-mix(in srgb, var(--nvidia) 40%, transparent);
}

@keyframes meshShift {
  from { transform: translateX(0); }
  to { transform: translateX(-2.5%); }
}

@keyframes signalPulse {
  0%, 100% { transform: scale(1); opacity: 0.45; }
  50% { transform: scale(1.04); opacity: 0.7; }
}

.hero__copy {
  position: relative;
  z-index: 1;
  max-width: 40rem;
}

.hero__brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 9vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.hero__lede {
  margin: 0 0 1.75rem;
  color: var(--ink-soft);
  max-width: 36rem;
}

.hero__lede code {
  color: var(--ink);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  padding: 0.1em 0.35em;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--nvidia);
  color: #0a0f05;
  border-color: var(--nvidia);
}

.btn--primary:hover {
  background: #85cf00;
  color: #0a0f05;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* Sections */
.section {
  padding: clamp(4rem, 10vh, 7rem) clamp(1.25rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nvidia-ink);
}

.section__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.section__lede {
  margin: 0 0 2.5rem;
  color: var(--ink-soft);
  max-width: 38rem;
}

.muted {
  color: var(--muted);
}

/* Problem list — not cards */
.issue-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.issue-list li {
  display: grid;
  gap: 0.35rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 720px) {
  .issue-list li {
    grid-template-columns: minmax(12rem, 18rem) 1fr;
    gap: 2rem;
    align-items: baseline;
  }
}

.issue-list strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.issue-list span {
  color: var(--ink-soft);
}

/* Solution nodes */
.node-split {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

@media (min-width: 800px) {
  .node-split {
    grid-template-columns: 1fr 1fr;
  }
}

.node-block {
  padding: 1.75rem 0;
}

@media (min-width: 800px) {
  .node-block {
    padding: 1.75rem 2rem 1.75rem 0;
  }

  .node-block + .node-block {
    padding-left: 2rem;
    border-left: 1px solid var(--line);
  }
}

.node-block h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.node-block p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.node-stat {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--nvidia-ink);
}

/* Install */
.install-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.install-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.install-steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--nvidia-ink);
  padding-top: 0.3rem;
}

.install-steps h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.install-steps p {
  margin: 0;
  color: var(--ink-soft);
}

.command-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.9rem;
}

.command-row code {
  display: inline-block;
  padding: 0.7rem 0.9rem;
  background: var(--ink);
  color: #e8ebe6;
  font-size: 0.85rem;
  word-break: break-all;
}

.copy-btn {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-elevated);
  color: var(--ink);
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.copy-btn:hover,
.copy-btn.is-copied {
  border-color: var(--nvidia);
  background: var(--nvidia-wash);
}

/* Releases */
.releases-head {
  display: grid;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 800px) {
  .releases-head {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}

.version-panel {
  min-width: 11rem;
  padding: 1.25rem 1.4rem;
  background: var(--ink);
  color: #e8ebe6;
}

.version-panel__label {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--nvidia);
}

.version-panel__num {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.version-panel__date,
.version-panel__downloads {
  margin: 0.65rem 0 0;
  font-size: 0.85rem;
  color: rgba(232, 235, 230, 0.65);
}

.latest-notes {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.latest-notes__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
}

.latest-notes__body ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.latest-notes__body li {
  margin-bottom: 0.45rem;
}

.latest-notes__body p {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
}

.release-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.release-item {
  display: grid;
  gap: 0.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(12px);
  animation: releaseIn 0.55s var(--ease) forwards;
}

.release-item.is-latest .release-item__ver {
  color: var(--nvidia-ink);
}

@media (min-width: 720px) {
  .release-item {
    grid-template-columns: 7rem 9rem 1fr;
    gap: 1.5rem;
    align-items: start;
  }
}

.release-item__ver {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
}

.release-item__date {
  font-size: 0.85rem;
  color: var(--muted);
}

.release-item__notes {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.release-item__notes ul {
  margin: 0;
  padding-left: 1.1rem;
}

@keyframes releaseIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.release-empty,
.release-error {
  padding: 1.5rem 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* Footer */
.site-footer {
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem) 3rem;
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.9rem;
  color: var(--muted);
}

.site-footer strong {
  color: var(--ink-soft);
  font-weight: 600;
}

.site-footer__links {
  display: flex;
  gap: 1.25rem;
  margin: 0;
}

.site-footer__links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}

.site-footer__links a:hover {
  color: var(--ink);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .page-grid,
  .hero__mesh,
  .hero__signal,
  .reveal,
  .release-item {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}