:root {
  --bg: #08111f;
  --bg-deep: #050a13;
  --panel: rgba(8, 16, 29, 0.82);
  --panel-strong: rgba(10, 20, 36, 0.94);
  --line: rgba(169, 184, 214, 0.18);
  --line-strong: rgba(205, 216, 255, 0.28);
  --text: #eff4ff;
  --muted: #afbdd7;
  --accent: #b5f179;
  --accent-soft: rgba(181, 241, 121, 0.18);
  --accent-2: #7cc8ff;
  --accent-3: #d7e0ff;
  --radius-lg: 2rem;
  --radius-md: 1.25rem;
  --radius-sm: 0.9rem;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 16%, rgba(124, 200, 255, 0.16), transparent 26%),
    radial-gradient(circle at 82% 18%, rgba(181, 241, 121, 0.14), transparent 24%),
    linear-gradient(180deg, #091321 0%, #07101d 48%, #050a13 100%);
  font-family: "Space Grotesk", "Avenir Next", sans-serif;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

body::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 82%);
}

body::after {
  background:
    radial-gradient(circle at 20% 28%, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px),
    radial-gradient(circle at 74% 22%, rgba(255, 255, 255, 0.14) 0 1px, transparent 1px),
    radial-gradient(circle at 46% 64%, rgba(255, 255, 255, 0.1) 0 1px, transparent 1px),
    radial-gradient(circle at 86% 72%, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px),
    radial-gradient(circle at 14% 80%, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

code,
pre {
  font-family: ui-monospace, "SFMono-Regular", "SF Mono", Consolas, monospace;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: #ffffff;
  color: #050a13;
}

.skip-link:focus {
  top: 1rem;
}

.page-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 4rem;
}

.section {
  margin-top: 4.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0 0.85rem;
}

.site-header.is-scrolled {
  backdrop-filter: blur(16px);
}

.brand-lockup {
  width: min(16rem, 48vw);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem;
}

.site-nav a {
  padding: 0.72rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  background: rgba(4, 10, 18, 0.5);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  border-color: rgba(181, 241, 121, 0.4);
  transform: translateY(-1px);
}

.nav-github {
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent), #f4ffba) !important;
  border-color: transparent !important;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: 1.8rem;
  align-items: stretch;
}

.hero-copy,
.visual-card,
.command-card,
.essay-card,
.feature-card,
.timeline-step,
.table-card,
.stack-card,
.faq-list details,
.site-footer {
  background: linear-gradient(180deg, rgba(8, 16, 29, 0.94), rgba(5, 10, 19, 0.94));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-copy,
.visual-card,
.essay-card,
.table-card,
.stack-card,
.faq-list details,
.site-footer {
  border-radius: var(--radius-lg);
}

.hero-copy {
  position: relative;
  padding: 2.5rem;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -6rem;
  top: -6rem;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(181, 241, 121, 0.25), transparent 72%);
}

.eyebrow,
.essay-kicker,
.command-label,
.feature-number,
.footer-title {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
}

h2 {
  max-width: 15ch;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1.3rem;
  line-height: 1.05;
}

.hero-dek,
.section-heading p,
.essay-card p,
.feature-card p,
.timeline-step p,
.stack-card p,
.faq-list p,
.site-footer p {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.hero-dek {
  max-width: 34rem;
  margin: 1.25rem 0 0;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button,
.copy-button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.85rem 1.3rem;
}

.button-primary {
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent), #f4ffba);
}

.button-secondary {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.button:hover,
.copy-button:hover {
  transform: translateY(-1px);
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 0;
  margin: 2rem 0 0;
  list-style: none;
}

.signal-list li {
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(181, 241, 121, 0.2);
  background: rgba(181, 241, 121, 0.08);
  color: var(--accent-3);
}

.hero-note {
  margin-top: 1.3rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.hero-visual {
  display: grid;
  gap: 1rem;
}

.visual-card {
  position: relative;
  overflow: hidden;
}

.visual-card-brand {
  min-height: 26rem;
  padding: 1.5rem;
  background:
    radial-gradient(circle at 18% 20%, rgba(124, 200, 255, 0.16), transparent 22%),
    linear-gradient(180deg, rgba(10, 18, 32, 0.96), rgba(5, 10, 19, 0.98));
}

.visual-card-brand img {
  width: min(100%, 28rem);
  margin: auto;
  aspect-ratio: 1;
  object-fit: contain;
}

.visual-card-terminal {
  padding: 1.25rem;
}

.terminal-head {
  display: flex;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.terminal-head span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
}

.visual-card-terminal pre {
  margin: 0;
  padding: 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.24);
  color: #d7ffbb;
  font-size: 0.95rem;
  line-height: 1.7;
  overflow-x: auto;
}

.section-heading {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1.5rem;
}

.section-heading h2 + p {
  max-width: 44rem;
  margin: 0;
}

.quick-strip {
  position: relative;
}

.command-grid,
.why-grid,
.feature-grid,
.model-grid,
.essay-stack {
  display: grid;
  gap: 1rem;
}

.command-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.command-card {
  padding: 1.4rem;
  border-radius: var(--radius-md);
}

.command-card code {
  display: block;
  margin-bottom: 1rem;
  color: var(--accent-3);
  font-size: 1rem;
  line-height: 1.5;
  word-break: break-word;
}

.copy-button {
  min-height: 2.8rem;
  padding: 0.72rem 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line-strong);
}

.copy-button.is-copied {
  color: var(--bg-deep);
  background: var(--accent);
  border-color: transparent;
}

.why-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.essay-card {
  padding: 1.75rem;
}

.essay-card h3,
.stack-card h3 {
  margin-bottom: 0.8rem;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  min-height: 14rem;
  padding: 1.55rem;
  border-radius: var(--radius-md);
}

.feature-number {
  margin-bottom: 1.1rem;
}

.timeline {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.timeline-step {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius-md);
}

.timeline-index {
  display: inline-flex;
  align-items: start;
  justify-content: start;
  color: var(--accent);
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.06em;
}

.model-grid {
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  align-items: start;
}

.table-card,
.stack-card {
  padding: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

caption {
  margin-bottom: 1rem;
  color: var(--accent-3);
  text-align: left;
  font-size: 1.1rem;
  font-weight: 500;
}

th,
td {
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--accent-3);
  font-weight: 500;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.essay-stack {
  grid-template-columns: 1fr;
}

.faq-list {
  display: grid;
  gap: 0.85rem;
}

.faq-list details {
  padding: 1.2rem 1.25rem;
}

.faq-list summary {
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 500;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details[open] summary {
  color: var(--accent-3);
}

.faq-list p {
  margin: 0.9rem 0 0;
}

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 4.5rem;
  padding: 1.5rem;
}

.footer-title {
  color: var(--text);
}

.footer-links {
  display: grid;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--accent-3);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

@media (max-width: 1080px) {
  .hero,
  .model-grid,
  .command-grid,
  .feature-grid,
  .why-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 2rem;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(var(--max-width), calc(100% - 1rem));
  }

  .site-header,
  .site-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .section {
    margin-top: 3.5rem;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.6rem, 16vw, 4.3rem);
  }

  h2 {
    max-width: none;
    font-size: clamp(1.85rem, 10vw, 2.7rem);
  }

  .hero-copy,
  .visual-card-brand,
  .table-card,
  .stack-card,
  .essay-card,
  .site-footer {
    padding: 1.3rem;
  }

  .timeline-step {
    grid-template-columns: 1fr;
  }

  .timeline-index {
    font-size: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}