:root {
  --bg: #f6f0e6;
  --surface: rgba(255, 250, 244, 0.82);
  --surface-strong: rgba(255, 250, 244, 0.96);
  --ink: #162033;
  --ink-soft: #42506d;
  --line: rgba(22, 32, 51, 0.12);
  --accent: #0f766e;
  --accent-deep: #0a4d48;
  --accent-warm: #d97706;
  --shadow: 0 24px 60px rgba(22, 32, 51, 0.1);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(217, 119, 6, 0.12), transparent 28%),
    linear-gradient(180deg, #f7f2e8 0%, #f3ede2 100%);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(22, 32, 51, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 32, 51, 0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 90%);
}

.page-aura {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 18%, rgba(15, 118, 110, 0.18), transparent 20%),
    radial-gradient(circle at 82% 12%, rgba(217, 119, 6, 0.14), transparent 18%),
    radial-gradient(circle at 50% 100%, rgba(22, 32, 51, 0.08), transparent 24%);
  filter: blur(14px);
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  width: min(1180px, calc(100vw - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1rem 0;
  backdrop-filter: blur(14px);
  background: rgba(246, 240, 230, 0.74);
  border-bottom: 1px solid transparent;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  box-shadow: 0 14px 30px rgba(22, 32, 51, 0.05);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  color: #f9f8f2;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
}

.brand-text span:last-child {
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem 1rem;
  max-width: 100%;
}

.site-nav a {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.64);
  color: var(--ink);
}

.hero,
.section,
.page-main {
  position: relative;
  z-index: 1;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 4.5rem 0 2.5rem;
  align-items: start;
}

.eyebrow,
.diagram-label,
.rail-title,
.pattern-tag,
.footer-title {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent-deep);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.02;
}

h1 {
  font-size: clamp(3rem, 7vw, 6.4rem);
  max-width: 10ch;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  max-width: 12ch;
}

h3 {
  font-size: 1.3rem;
}

.hero-subtitle,
.page-intro,
.definition-lead,
.big-line {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: var(--ink);
  max-width: 40rem;
}

.hero-body,
.section p,
.prose-panel p,
.message-card p,
.pillar-card p,
.compare-card p {
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.cta-row,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fbfaf6;
  box-shadow: 0 14px 28px rgba(10, 77, 72, 0.25);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.68);
  border-color: var(--line);
  color: var(--ink);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.proof-strip li,
.proof-card,
.signal-card,
.term-pill,
.definition-panel,
.pattern-list article,
.message-card,
.pillar-card,
.compare-card,
.cta-panel,
.statement-card,
.prose-panel {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.proof-strip li {
  padding: 1rem;
  font-size: 0.92rem;
  color: var(--ink);
}

.hero-diagram {
  position: relative;
  padding: 1.5rem;
  border-radius: 32px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 250, 244, 0.92), rgba(255, 250, 244, 0.82)),
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.16), transparent 30%);
  box-shadow: 0 26px 50px rgba(22, 32, 51, 0.12);
  overflow: hidden;
}

.hero-diagram::before,
.hero-diagram::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(0.5px);
}

.hero-diagram::before {
  width: 12rem;
  height: 12rem;
  right: -2rem;
  top: -3rem;
  background: rgba(15, 118, 110, 0.12);
}

.hero-diagram::after {
  width: 8rem;
  height: 8rem;
  left: -1rem;
  bottom: -2rem;
  background: rgba(217, 119, 6, 0.12);
}

.diagram-rails {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.rail {
  padding: 1rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(22, 32, 51, 0.08);
}

.rail-node {
  padding: 0.85rem 0.9rem;
  border-radius: 16px;
  background: rgba(15, 118, 110, 0.09);
  color: var(--ink);
}

.rail-node + .rail-node {
  margin-top: 0.65rem;
}

.diagram-output {
  margin-top: 1rem;
  padding: 1rem 1.15rem;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.12), rgba(15, 118, 110, 0.12));
}

.diagram-output span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.diagram-output strong {
  display: block;
  margin-top: 0.3rem;
  font-size: 1.15rem;
}

.diagram-note {
  margin: 1rem 0 0;
  font-size: 0.92rem;
}

.section,
.page-main {
  padding: 2rem 0;
}

.section-heading {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.signal-grid,
.definition-grid,
.proof-grid,
.message-grid,
.pillar-grid,
.footer-grid {
  display: grid;
  gap: 1.2rem;
}

.signal-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.signal-card,
.definition-panel,
.message-card,
.pillar-card,
.compare-card,
.prose-panel {
  padding: 1.35rem;
}

.term-stack,
.pattern-list,
.comparison-sections,
.faq-list {
  display: grid;
  gap: 0.85rem;
}

.term-pill {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.1rem;
}

.term-pill span {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.term-faded {
  opacity: 0.74;
}

.term-accent {
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.14), rgba(217, 119, 6, 0.14));
}

.definition-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.pattern-list article {
  padding: 1.2rem;
}

.proof-grid,
.message-grid,
.pillar-grid,
.footer-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.statement-card {
  margin-top: 1.2rem;
  padding: 1.5rem;
  border-left: 4px solid var(--accent);
}

.statement-card p {
  margin: 0;
  font-size: 1.25rem;
  max-width: 34rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.15rem;
  font-weight: 600;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
}

.faq-item p {
  margin: 0;
  padding: 1rem 1.15rem 1.2rem;
}

.cta-panel {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.16), rgba(217, 119, 6, 0.1)),
    rgba(255, 250, 244, 0.9);
}

.site-footer {
  padding: 2rem 0 3rem;
}

.page-main {
  padding-top: 3.2rem;
}

.page-hero {
  margin-bottom: 1.25rem;
}

.prose-panel,
.faq-long,
.comparison-sections {
  margin-top: 1.4rem;
}

.prose-list {
  margin: 1rem 0;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.standout-line {
  font-size: 1.15rem;
  color: var(--ink);
  font-weight: 600;
}

.message-card.standout-card {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.16), rgba(217, 119, 6, 0.09)),
    rgba(255, 250, 244, 0.92);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 500ms ease, transform 500ms ease;
}

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

@media (max-width: 1080px) {
  .message-card.standout-card {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100vw - 1.2rem, 100%);
  }

  .nav-shell {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 3.2rem;
  }

  .proof-strip {
    grid-template-columns: 1fr;
  }

  h1,
  h2 {
    max-width: none;
  }
}