:root {
  --bg: #070d13;
  --bg-elevated: rgba(15, 22, 31, 0.88);
  --panel: rgba(18, 26, 37, 0.82);
  --panel-strong: rgba(23, 33, 46, 0.95);
  --border: rgba(149, 188, 211, 0.16);
  --border-strong: rgba(149, 188, 211, 0.28);
  --text: #e8edf3;
  --text-muted: #a4b3c2;
  --accent-cyan: #8fe7ff;
  --accent-mint: #7cf0bf;
  --accent-amber: #ffc06d;
  --accent-red: #ff9173;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1180px;
  --font-display: "Sora", "Avenir Next", "Segoe UI Variable Display", "Helvetica Neue", sans-serif;
  --font-body: "Avenir Next", "Segoe UI Variable Text", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 240, 191, 0.13), transparent 28%),
    radial-gradient(circle at top right, rgba(143, 231, 255, 0.14), transparent 34%),
    radial-gradient(circle at 50% 120%, rgba(255, 192, 109, 0.11), transparent 26%),
    var(--bg);
  font-family: var(--font-body);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(circle at center, black, transparent 80%);
  opacity: 0.18;
}

a {
  color: inherit;
}

code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--accent-cyan);
}

.site-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(7, 13, 19, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.topnav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.topnav a:hover,
.topnav a.is-active {
  color: var(--text);
  background: rgba(143, 231, 255, 0.1);
}

.panel {
  position: relative;
  margin-bottom: 24px;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0)),
    var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(143, 231, 255, 0.12), transparent 32%, transparent 70%, rgba(255, 192, 109, 0.09));
  opacity: 0.5;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(280px, 0.95fr);
  gap: 28px;
  min-height: 420px;
}

.hero-copy,
.hero-meta,
.section-head,
.card,
.feature-quote,
.verdict-card,
.footer-note,
.source-list {
  position: relative;
  z-index: 1;
}

.eyebrow-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid rgba(143, 231, 255, 0.18);
  border-radius: 999px;
  background: rgba(143, 231, 255, 0.08);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow.muted {
  border-color: rgba(255, 192, 109, 0.18);
  background: rgba(255, 192, 109, 0.08);
  color: var(--accent-amber);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

h1 {
  max-width: 12ch;
  font-size: clamp(3.2rem, 7vw, 6.7rem);
  line-height: 0.92;
}

h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.7rem);
  line-height: 1;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.18rem;
  line-height: 1.15;
}

p {
  margin: 0 0 14px;
  color: var(--text-muted);
}

p:last-child {
  margin-bottom: 0;
}

.hero-text {
  max-width: 56ch;
  margin-top: 18px;
  font-size: 1.1rem;
}

.hero-note {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.legend-card,
.meta-card,
.card,
.feature-quote,
.verdict-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(11, 17, 24, 0.64);
}

.legend-card {
  padding: 16px 18px;
}

.hero-meta {
  display: grid;
  gap: 14px;
  align-content: start;
}

.meta-card {
  padding: 18px;
  background: rgba(10, 16, 23, 0.78);
}

.meta-label {
  display: block;
  margin-bottom: 10px;
  color: var(--accent-mint);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 24px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  color: var(--accent-amber);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-intro {
  max-width: 68ch;
  margin: -6px 0 18px;
}

.card-grid {
  display: grid;
  gap: 16px;
}

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

.quad-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.thesis-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.2fr);
  gap: 18px;
}

.positioning-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card,
.feature-quote,
.verdict-card {
  padding: 22px;
}

.accent-card {
  background:
    linear-gradient(180deg, rgba(143, 231, 255, 0.08), transparent 80%),
    rgba(11, 17, 24, 0.72);
}

.warning-card {
  background:
    linear-gradient(180deg, rgba(255, 145, 115, 0.08), transparent 80%),
    rgba(11, 17, 24, 0.72);
}

.feature-quote {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 240px;
  background:
    radial-gradient(circle at top right, rgba(124, 240, 191, 0.1), transparent 38%),
    rgba(11, 17, 24, 0.78);
}

.feature-quote p {
  color: var(--text);
  font-size: clamp(1.36rem, 2vw, 1.72rem);
  line-height: 1.28;
}

.verdict-card {
  max-width: 78ch;
  background:
    radial-gradient(circle at top right, rgba(255, 192, 109, 0.12), transparent 36%),
    rgba(11, 17, 24, 0.78);
}

.list,
.ordered-list,
.source-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li,
.ordered-list li,
.source-list li {
  padding: 14px 0;
  border-top: 1px solid rgba(149, 188, 211, 0.12);
  color: var(--text-muted);
}

.list li:first-child,
.ordered-list li:first-child,
.source-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.list li:last-child,
.ordered-list li:last-child,
.source-list li:last-child {
  padding-bottom: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  margin-right: 8px;
  margin-bottom: 8px;
  padding: 5px 9px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tag.observation {
  background: rgba(143, 231, 255, 0.1);
  color: var(--accent-cyan);
}

.tag.inference {
  background: rgba(255, 192, 109, 0.11);
  color: var(--accent-amber);
}

.footer {
  padding-bottom: 28px;
}

.footer-head {
  margin-bottom: 18px;
}

.source-list a {
  color: var(--text);
  text-decoration-color: rgba(143, 231, 255, 0.35);
}

.source-list a:hover {
  text-decoration-color: var(--accent-cyan);
}

.footer-note {
  margin-top: 18px;
  color: var(--text-muted);
}

body[data-enhanced="true"] .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

body[data-enhanced="true"] .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero,
  .thesis-layout,
  .split-grid,
  .summary-grid,
  .tri-grid,
  .quad-grid,
  .positioning-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .site-shell {
    width: min(calc(100% - 20px), var(--max-width));
    padding-top: 14px;
  }

  .topbar {
    top: 10px;
    align-items: flex-start;
    flex-direction: column;
    border-radius: 24px;
  }

  .topnav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .panel {
    padding: 22px;
    border-radius: 24px;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.6rem, 14vw, 4.8rem);
  }

  .hero-text {
    font-size: 1rem;
  }
}