:root {
  --bg: #0b1317;
  --bg-soft: rgba(14, 21, 26, 0.9);
  --panel: rgba(16, 25, 31, 0.82);
  --line: rgba(193, 214, 214, 0.13);
  --ink: #eef5f3;
  --muted: #a2b6b3;
  --accent: #e2c98b;
  --signal: #8ad1c4;
  --steel: #7ea0d2;
  --shadow: 0 26px 90px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Archivo", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(126, 160, 210, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(138, 209, 196, 0.16), transparent 24%),
    linear-gradient(180deg, #081014 0%, #0b1317 50%, #0a1115 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  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: 30px 30px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.36), transparent 78%);
}

a {
  color: var(--signal);
  text-decoration: none;
}

a:hover {
  color: #bdf1e8;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 72px;
}

.panel {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-soft), var(--panel));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), transparent 30%);
}

.hero {
  padding: 52px clamp(22px, 4vw, 48px);
  margin-bottom: 24px;
  background:
    linear-gradient(180deg, rgba(21, 36, 45, 0.94), rgba(15, 23, 29, 0.88)),
    linear-gradient(120deg, rgba(226, 201, 139, 0.06), transparent 35%);
}

.eyebrow,
.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1,
h2,
h3 {
  margin: 0;
}

h1,
h2 {
  font-family: "Source Serif 4", serif;
  font-weight: 700;
}

h1 {
  max-width: 12ch;
  font-size: clamp(3rem, 6vw, 5.3rem);
  line-height: 0.96;
}

h2 {
  font-size: clamp(1.45rem, 2.3vw, 2.35rem);
  line-height: 1.08;
}

h3 {
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.2;
}

.lede,
p,
li {
  color: var(--muted);
  line-height: 1.72;
  font-size: 1rem;
}

.lede {
  max-width: 70ch;
  margin: 18px 0 0;
  font-size: 1.06rem;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.content-grid > .panel {
  grid-column: span 6;
  padding: 28px;
}

.content-grid > .span-two {
  grid-column: span 12;
}

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

.intro-panel {
  background: linear-gradient(180deg, rgba(16, 35, 44, 0.95), rgba(13, 24, 29, 0.88));
}

.inference-panel {
  background: linear-gradient(180deg, rgba(14, 33, 41, 0.95), rgba(10, 23, 29, 0.88));
}

.claim-grid,
.pipeline,
.compare-grid,
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.claim-grid article,
.pipeline article,
.compare-grid article,
.link-grid article,
.equation-card,
.media-card {
  position: relative;
  z-index: 1;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.claim-grid p,
.pipeline p,
.compare-grid p,
.link-grid p {
  margin: 10px 0 0;
}

.equation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.equation-box {
  margin-bottom: 12px;
  padding: 18px 14px;
  border-radius: 18px;
  border: 1px solid rgba(226, 201, 139, 0.14);
  background: rgba(5, 13, 18, 0.58);
  overflow-x: auto;
}

.operator-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(138, 209, 196, 0.16);
  background: rgba(138, 209, 196, 0.08);
}

.operator-note strong {
  color: var(--ink);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--signal));
  color: #091116;
  font-weight: 800;
}

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

.clean-list li {
  position: relative;
  padding-left: 18px;
}

.clean-list li + li {
  margin-top: 14px;
}

.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--signal));
}

.gallery-panel {
  background: linear-gradient(180deg, rgba(15, 32, 39, 0.95), rgba(12, 22, 27, 0.88));
}

.inference-figure {
  margin: 0;
  padding: 16px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.inference-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 13, 18, 0.55);
}

.inference-figure figcaption {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.68;
}

.inference-figure strong {
  color: var(--ink);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.media-card {
  margin: 0;
}

.media-card img {
  display: block;
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 13, 18, 0.55);
}

.media-card figcaption {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.68;
}

.media-card strong {
  color: var(--ink);
}

.source-line {
  display: block;
  margin-top: 10px;
  font-size: 0.9rem;
}

.note-panel {
  background: linear-gradient(180deg, rgba(34, 28, 12, 0.72), rgba(14, 23, 28, 0.92));
}

.link-panel {
  background: linear-gradient(180deg, rgba(16, 35, 44, 0.95), rgba(13, 24, 29, 0.88));
}

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

.link-grid a {
  display: inline-block;
  margin-top: 12px;
  font-weight: 700;
}

@media (max-width: 980px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .content-grid > .panel,
  .content-grid > .span-two {
    grid-column: auto;
  }

  .claim-grid,
  .pipeline,
  .compare-grid,
  .link-grid,
  .equation-grid,
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 18px, 1180px);
    padding-top: 18px;
  }

  .hero,
  .content-grid > .panel {
    padding: 22px 18px;
    border-radius: 22px;
  }

  .claim-grid,
  .pipeline,
  .compare-grid,
  .link-grid,
  .equation-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .media-card img {
    height: 220px;
  }

  .lede,
  p,
  li {
    line-height: 1.6;
  }
}