:root {
  --bg: #06090f;
  --bg-deep: #0b1220;
  --surface: rgba(9, 18, 32, 0.72);
  --surface-strong: rgba(14, 24, 40, 0.92);
  --ink: #ecf6ff;
  --ink-soft: #8ca0b8;
  --accent: #00e5ff;
  --accent-strong: #7af7ff;
  --accent-warm: #67ff9b;
  --line: rgba(122, 247, 255, 0.16);
  --shadow: 0 30px 120px rgba(0, 0, 0, 0.45);
  --radius-xl: 22px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --max-width: 1180px;
  --serif: "Times New Roman", "Iowan Old Style", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Code", "Fira Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(0, 229, 255, 0.12), transparent 26%),
    radial-gradient(circle at 84% 12%, rgba(103, 255, 155, 0.08), transparent 20%),
    radial-gradient(circle at 50% 120%, rgba(0, 102, 255, 0.1), transparent 36%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  color: var(--ink);
  font-family: var(--sans);
}

a {
  color: var(--accent-strong);
}

a:hover,
a:focus-visible {
  color: var(--accent-warm);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(122, 247, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 247, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black, transparent 82%);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(transparent 0%, rgba(0, 0, 0, 0.18) 50%, transparent 100%);
  background-size: 100% 4px;
  opacity: 0.16;
  pointer-events: none;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.ambient {
  position: absolute;
  border-radius: 999px;
  filter: blur(44px);
  opacity: 0.8;
  pointer-events: none;
}

.ambient-one {
  top: 180px;
  right: -120px;
  width: 320px;
  height: 320px;
  background: rgba(0, 229, 255, 0.18);
}

.ambient-two {
  top: 880px;
  left: -80px;
  width: 240px;
  height: 240px;
  background: rgba(103, 255, 155, 0.12);
}

.site-header,
.section {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: linear-gradient(180deg, rgba(6, 9, 15, 0.86), rgba(6, 9, 15, 0.32));
}

.brand,
.site-nav a,
.button {
  text-decoration: none;
  color: inherit;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.86rem;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  border: 1px solid rgba(122, 247, 255, 0.36);
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.18), rgba(103, 255, 155, 0.08)),
    rgba(10, 17, 28, 0.92);
  color: var(--accent-strong);
  font-family: var(--mono);
  font-size: 1rem;
  text-transform: none;
  box-shadow: inset 0 0 20px rgba(0, 229, 255, 0.1);
}

.site-nav {
  display: flex;
  gap: 1.4rem;
  font-size: 0.96rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.84rem;
}

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

.section {
  padding: 4.5rem 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  padding-top: 5.5rem;
  min-height: calc(100vh - 4rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-strong);
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 0.95;
  font-family: var(--sans);
  font-weight: 700;
}

h1 {
  font-size: clamp(3.7rem, 8vw, 6.8rem);
  max-width: 10ch;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  max-width: 13ch;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

h3 {
  font-size: 1.3rem;
  line-height: 1.12;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.hero-text,
.section-text,
.feature-card p,
.impact-card p,
.faq-item p,
.flow-list p,
.comparison-head p {
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 1.02rem;
}

.hero-text {
  max-width: 58ch;
  margin: 1.4rem 0 0;
  font-size: 1.13rem;
}

code,
pre {
  font-family: var(--mono);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.2rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
}

.button-primary {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.22), rgba(122, 247, 255, 0.08));
  color: var(--ink);
  box-shadow: var(--shadow);
  border-color: rgba(122, 247, 255, 0.3);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.hero-points {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 1.8rem 0 0;
}

.hero-points li {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(122, 247, 255, 0.12);
  color: var(--ink-soft);
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.glass {
  background:
    linear-gradient(180deg, rgba(16, 24, 38, 0.88), rgba(8, 14, 24, 0.74));
  border: 1px solid rgba(122, 247, 255, 0.14);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-panel {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
}

.panel-card {
  padding: 1.4rem;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.panel-card::before,
.feature-card::before,
.impact-card::before,
.flow-card::before,
.diagram-card::before,
.comparison-card::before,
.faq-item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(122, 247, 255, 0.06), transparent 40%);
  pointer-events: none;
}

.focus {
  transform: translateY(26px);
}

.panel-arrow {
  font-size: 2rem;
  color: var(--accent-strong);
  text-shadow: 0 0 24px rgba(122, 247, 255, 0.3);
}

.panel-label,
.impact-kicker {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

.stack-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.stack-list li {
  padding: 0.8rem 0.95rem;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid transparent;
}

.warning li {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 90, 90, 0.16);
}

.success li {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(122, 247, 255, 0.16);
}

.section-heading {
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin-bottom: 1rem;
}

.section-top-link {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.section-top-link a {
  color: var(--ink-soft);
  text-decoration: none;
}

.section-top-link a:hover,
.section-top-link a:focus-visible {
  color: var(--accent-strong);
}

.principles-grid,
.impact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.feature-card,
.impact-card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
}

.feature-card h3,
.impact-card h3 {
  margin-bottom: 0.9rem;
}

.band {
  position: relative;
}

.band::before {
  content: "";
  position: absolute;
  inset: 1rem 0;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.03), rgba(103, 255, 155, 0.015));
  border-top: 1px solid rgba(122, 247, 255, 0.1);
  border-bottom: 1px solid rgba(122, 247, 255, 0.05);
  z-index: -1;
}

.implementation-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  align-items: start;
}

.flow-card,
.diagram-card,
.comparison-card {
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

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

.flow-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.flow-list span {
  display: inline-grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.18), rgba(103, 255, 155, 0.12));
  border: 1px solid rgba(122, 247, 255, 0.24);
  color: var(--ink);
  font-weight: 700;
  box-shadow: inset 0 0 18px rgba(122, 247, 255, 0.08);
}

.flow-list h3 {
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.diagram-header {
  margin-bottom: 1.25rem;
}

.diagram-header span {
  display: block;
  margin-bottom: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.diagram-header p,
.mermaid-diagram {
  color: var(--ink-soft);
  line-height: 1.65;
}

.mermaid-diagram {
  margin: 0;
  overflow-x: auto;
  padding: 1.2rem;
  border-radius: 14px;
  background: #05070c;
  border: 1px solid rgba(122, 247, 255, 0.14);
  box-shadow: inset 0 0 40px rgba(0, 229, 255, 0.04);
}

.mermaid-diagram svg {
  display: block;
  width: 100%;
  min-width: 0;
  height: auto;
}

.comparison-card {
  margin-top: 1.2rem;
}

.comparison-head {
  margin-bottom: 1rem;
}

.comparison-table {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

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

.comparison-row > div {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
}

.comparison-row > div:first-child {
  border-right: 1px solid var(--line);
}

.comparison-row + .comparison-row > div {
  border-top: 1px solid var(--line);
}

.comparison-labels > div {
  font-weight: 700;
  background: rgba(0, 229, 255, 0.08);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-item {
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  position: relative;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

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

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 500ms ease,
    transform 500ms ease;
}

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

@media (max-width: 960px) {
  .hero,
  .implementation-grid,
  .principles-grid,
  .impact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  .hero-panel {
    grid-template-columns: 1fr;
  }

  .panel-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }

  .focus {
    transform: none;
  }

}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    gap: 1rem;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .section {
    padding: 3.4rem 0;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.8rem);
  }

  .comparison-row {
    grid-template-columns: 1fr;
  }

  .comparison-row > div:first-child {
    border-right: none;
  }

  .mermaid-diagram {
    padding: 0.9rem;
  }
}