:root {
  color-scheme: dark;
  --bg: #101314;
  --bg-soft: #171b1d;
  --text: #f2ede4;
  --muted: #b6ad9d;
  --line: rgba(242, 237, 228, 0.12);
  --line-strong: rgba(242, 237, 228, 0.25);
  --surface-light: #e8e1d4;
  --surface-light-strong: #f4eee2;
  --ink: #121516;
  --ink-soft: #3b4346;
  --accent: #8fd5c6;
  --accent-strong: #c86e52;
  --accent-warm: #c6a15b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --radius: 8px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background:
    linear-gradient(180deg, rgba(143, 213, 198, 0.08), transparent 16rem),
    linear-gradient(90deg, rgba(242, 237, 228, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(242, 237, 228, 0.03) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 2rem 2rem, 2rem 2rem, auto;
  color: var(--text);
  line-height: 1.6;
}

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

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(16, 19, 20, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-shell,
.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.95rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.brand img {
  width: 3rem;
  height: 3rem;
  border-radius: 0.85rem;
  box-shadow: 0 0 0 1px rgba(242, 237, 228, 0.08);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.brand-copy strong {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-copy small,
.site-nav a,
.eyebrow,
.index,
.signal-strip span,
.visual-label,
details summary {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.64rem;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 1.1rem;
}

.site-nav a {
  position: relative;
  font-size: 0.75rem;
  text-decoration: none;
  color: var(--muted);
}

.site-nav a[aria-current="true"] {
  color: var(--text);
}

.site-nav a[aria-current="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.4rem;
  height: 1px;
  background: var(--accent);
}

.section {
  padding: 5rem 0;
}

.hero {
  padding-top: 4rem;
  padding-bottom: 5.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.95fr);
  gap: 3rem;
  align-items: center;
}

.hero-copy h1,
.section-heading h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy h1 {
  font-size: clamp(3rem, 8vw, 5.75rem);
  max-width: 11ch;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.72rem;
}

.eyebrow-dark {
  color: var(--ink-soft);
}

.lede,
.section-heading p {
  max-width: 42rem;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-copy .lede {
  margin: 1.5rem 0 0;
  max-width: 34rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1.2rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: var(--surface-light);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.button.subtle {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.signal-strip li,
.principle-card,
.system-block,
.faq-grid details {
  border: 1px solid;
  border-radius: var(--radius);
}

.signal-strip li {
  border-color: var(--line);
  padding: 0.95rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  min-height: 6rem;
}

.signal-strip span {
  display: block;
  color: var(--muted);
  font-size: 0.65rem;
  margin-bottom: 0.5rem;
}

.signal-strip strong {
  font-size: 0.95rem;
}

.hero-visual {
  position: relative;
  min-height: 29rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(143, 213, 198, 0.12), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%),
    var(--bg-soft);
  box-shadow: var(--shadow);
}

.hero-mark {
  position: absolute;
  inset: 12%;
  width: 76%;
  height: auto;
  margin: auto;
  filter: drop-shadow(0 22px 40px rgba(0, 0, 0, 0.4));
}

.visual-grid,
.visual-scan {
  position: absolute;
  inset: 0;
}

.visual-grid {
  background:
    linear-gradient(90deg, rgba(242, 237, 228, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(242, 237, 228, 0.06) 1px, transparent 1px);
  background-size: 3rem 3rem;
  mask-image: radial-gradient(circle at center, black 35%, transparent 92%);
}

.visual-scan-a {
  background: linear-gradient(135deg, transparent 49.4%, rgba(143, 213, 198, 0.72) 50%, transparent 50.6%);
  opacity: 0.35;
}

.visual-scan-b {
  background: linear-gradient(0deg, transparent 49.7%, rgba(198, 161, 91, 0.9) 50%, transparent 50.3%);
  opacity: 0.3;
}

.visual-label {
  position: absolute;
  color: rgba(242, 237, 228, 0.72);
  font-size: 0.64rem;
}

.label-top {
  left: 1rem;
  top: 1rem;
}

.label-bottom {
  right: 1rem;
  bottom: 1rem;
  text-align: right;
}

.band-light {
  background: var(--surface-light);
  color: var(--ink);
}

.band-light .section-heading p,
.band-light .principle-card p,
.band-light .faq-grid p {
  color: var(--ink-soft);
}

.band-contrast {
  background: linear-gradient(180deg, rgba(242, 237, 228, 0.04), transparent 16rem), #111516;
}

.section-heading {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.3rem);
  max-width: 12ch;
}

.principle-grid,
.systems-grid,
.faq-grid {
  display: grid;
  gap: 1rem;
}

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

.principle-card {
  background: rgba(255, 255, 255, 0.26);
  border-color: rgba(18, 21, 22, 0.12);
  padding: 1.25rem;
}

.principle-card h3,
.system-block h3,
.manifesto-grid h3 {
  margin: 0 0 0.8rem;
  font-size: 1.2rem;
  line-height: 1.2;
}

.index {
  margin: 0 0 0.8rem;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 700;
}

.manifesto-layout,
.systems-layout {
  display: grid;
  gap: 2rem;
}

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

.manifesto-grid article {
  padding-top: 1rem;
  border-top: 1px solid var(--line-strong);
}

.manifesto-grid p:not(.index),
.systems-grid p {
  color: var(--muted);
}

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

.system-block {
  padding: 1.3rem;
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.02);
}

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

.faq-grid details {
  border-color: rgba(18, 21, 22, 0.14);
  background: rgba(255, 255, 255, 0.24);
  padding: 1rem 1.1rem;
}

.faq-grid summary {
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
  list-style: none;
}

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

.faq-grid details[open] {
  background: rgba(255, 255, 255, 0.48);
}

.faq-grid p {
  margin: 0.85rem 0 0;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .principle-grid,
  .manifesto-grid,
  .systems-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-visual {
    min-height: 22rem;
  }
}

@media (max-width: 720px) {
  .header-shell,
  .footer-shell,
  .site-nav,
  .signal-strip {
    gap: 0.8rem;
  }

  .header-shell,
  .footer-shell {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .section {
    padding: 4rem 0;
  }

  .hero-copy h1 {
    max-width: none;
  }

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

  .button {
    width: 100%;
  }
}