@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --bone: #f7f4ef;
  --stone: #e8e4dc;
  --smoke: #8c8880;
  --graphite: #2c2c2c;
  --deep: #1a1714;
  --accent: #1b3a4b;
  --accent-mute: #dce5ea;
  --max: 1180px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --radius: 18px;
  --shadow: 0 18px 42px rgba(28, 23, 20, 0.08);
  --ease-door: cubic-bezier(0.25, 0, 0, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  color: var(--graphite);
  background:
    radial-gradient(circle at 12% 8%, rgba(27, 58, 75, 0.08), transparent 34%),
    radial-gradient(circle at 84% 96%, rgba(140, 136, 128, 0.15), transparent 35%),
    linear-gradient(180deg, #faf7f2 0%, var(--bone) 55%, #f2eee6 100%);
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  z-index: 20;
}

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

.site-shell {
  width: min(100% - 10vw, var(--max));
  margin: 0 auto;
}

.site-header {
  padding: var(--space-6) 0 var(--space-5);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: linear-gradient(to bottom, rgba(247, 244, 239, 0.93), rgba(247, 244, 239, 0.72));
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-mark {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--smoke);
  font-weight: 600;
}

.brand-name {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  line-height: 1;
}

.ecosystem-badge {
  margin-top: 6px;
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  border: 1px solid rgba(27, 58, 75, 0.28);
  padding: 3px 8px;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--smoke);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-4);
}

.nav-link {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--smoke);
  font-weight: 600;
  transition: color 200ms ease;
}

.nav-link:hover,
.nav-link[aria-current='page'] {
  color: var(--graphite);
}

.accent-link {
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}

main {
  padding-bottom: var(--space-9);
}

section {
  padding: clamp(56px, 11vh, 108px) 0;
  border-top: 1px solid rgba(44, 44, 44, 0.08);
}

section:first-of-type {
  border-top: 0;
}

.hero {
  padding-top: clamp(40px, 10vh, 96px);
  min-height: 72vh;
  position: relative;
  border-top: 0;
}

.hero::after {
  content: '01';
  position: absolute;
  right: -2vw;
  top: 7vh;
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(8rem, 24vw, 18rem);
  color: rgba(27, 58, 75, 0.06);
  pointer-events: none;
}

.kicker {
  margin: 0 0 var(--space-4);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 600;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.15;
  font-weight: 400;
}

h1 {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(2.3rem, 6vw, 5.2rem);
  max-width: 11ch;
}

h1 em {
  font-style: italic;
}

.lede {
  margin: var(--space-6) 0 0;
  max-width: 70ch;
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  color: #3a3732;
}

.hero-actions {
  margin-top: var(--space-7);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(44, 44, 44, 0.2);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 220ms var(--ease-door);
}

.btn:hover {
  transform: translateY(-1px);
  border-color: rgba(44, 44, 44, 0.35);
}

.btn-primary {
  color: var(--accent);
  border-color: rgba(27, 58, 75, 0.4);
  background: rgba(27, 58, 75, 0.05);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.4);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-5);
}

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

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

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

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.section-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(1.6rem, 3.2vw, 2.8rem);
  max-width: 14ch;
}

.section-summary {
  margin: 0;
  color: #4b4843;
}

.card,
.data-card,
.stack-card,
.resource-card,
.service-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.36));
  border: 1px solid rgba(44, 44, 44, 0.09);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow);
}

.card h3,
.data-card h3,
.stack-card h3,
.resource-card h3,
.service-card h3 {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.35rem;
  margin-bottom: var(--space-3);
}

.card p,
.data-card p,
.stack-card p,
.resource-card p,
.service-card p {
  margin: 0;
  color: #4e4b46;
}

.bullet-list,
.tight-list {
  margin: var(--space-4) 0 0;
  padding-left: 18px;
}

.bullet-list li,
.tight-list li {
  margin-bottom: var(--space-2);
}

.tight-list {
  margin-top: var(--space-3);
}

.pillar {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-5);
  max-width: 76ch;
}

.principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.principle {
  padding: var(--space-5);
  border: 1px solid rgba(44, 44, 44, 0.1);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.48);
}

.principle h4 {
  font-size: 0.88rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--smoke);
  margin-bottom: var(--space-2);
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 600;
}

.principle p {
  margin: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(140, 136, 128, 0.16);
  color: #5a5752;
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-weight: 600;
}

.mistake-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.mistake {
  border: 1px solid rgba(44, 44, 44, 0.1);
  border-radius: 14px;
  padding: var(--space-5);
  background: rgba(255, 255, 255, 0.5);
}

.mistake h4 {
  margin-bottom: var(--space-3);
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.4rem;
}

.mistake strong {
  display: block;
  margin-bottom: var(--space-1);
}

.matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.matrix th,
.matrix td {
  text-align: left;
  padding: var(--space-3);
  border-bottom: 1px solid rgba(44, 44, 44, 0.1);
  vertical-align: top;
}

.matrix th {
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 600;
}

.callout {
  margin-top: var(--space-7);
  padding: var(--space-6);
  border-radius: var(--radius);
  border: 1px solid rgba(27, 58, 75, 0.28);
  background: linear-gradient(135deg, rgba(27, 58, 75, 0.08), rgba(27, 58, 75, 0.02));
}

.callout h3 {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.callout p {
  margin: 0;
  max-width: 70ch;
}

.cta-strip {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.flow-board {
  margin-top: var(--space-6);
  border: 1px solid rgba(44, 44, 44, 0.12);
  border-radius: var(--radius);
  padding: var(--space-6);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0.36));
  box-shadow: var(--shadow);
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.flow-node {
  border: 1px solid rgba(44, 44, 44, 0.1);
  border-radius: 14px;
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.7);
}

.flow-node strong {
  display: block;
  margin-bottom: var(--space-2);
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.2rem;
  font-weight: 400;
}

.flow-node p {
  margin: 0;
  color: #504d48;
  font-size: 0.95rem;
}

.flow-caption {
  margin: var(--space-4) 0 0;
  color: #5b5752;
}

.op-list {
  margin: var(--space-3) 0 0;
  padding-left: 18px;
}

.op-list li + li {
  margin-top: var(--space-2);
}

.architecture-detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.architecture-detail p {
  margin: 0;
}

.label {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

.template-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px dashed rgba(44, 44, 44, 0.18);
}

.template-link:last-child {
  border-bottom: 0;
}

.template-link span {
  color: #615e59;
  font-size: 0.92rem;
}

details {
  border: 1px solid rgba(44, 44, 44, 0.11);
  border-radius: 12px;
  padding: var(--space-4) var(--space-5);
  background: rgba(255, 255, 255, 0.5);
}

details + details {
  margin-top: var(--space-3);
}

summary {
  cursor: pointer;
  font-weight: 600;
}

.footer {
  border-top: 1px solid rgba(44, 44, 44, 0.11);
  padding: var(--space-7) 0;
  margin-top: var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.footer-title {
  margin: 0 0 var(--space-2);
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.35rem;
}

.footer-label {
  margin: 0 0 var(--space-3);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--smoke);
  font-weight: 600;
}

.footer-copy {
  margin: 0;
  color: #5c5954;
  font-size: 0.92rem;
  line-height: 1.6;
}

.footer-copy p {
  margin: 0;
}

.footer-copy p + p {
  margin-top: 4px;
}

.footer-links {
  margin: 0;
  padding-left: 16px;
  color: #5c5954;
  font-size: 0.92rem;
}

.footer-links li + li {
  margin-top: 6px;
}

.footer a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(44, 44, 44, 0.1);
  color: #6a6762;
  font-size: 0.8rem;
  line-height: 1.5;
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom p + p {
  margin-top: 4px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms var(--ease-door), transform 800ms var(--ease-door);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-head,
  .grid-2,
  .mistake-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .hero::after {
    right: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 8vw, var(--max));
  }

  .site-header {
    padding-top: var(--space-5);
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

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

  .hero {
    min-height: 0;
  }

  .hero::after {
    top: 0;
    font-size: clamp(6rem, 35vw, 12rem);
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .flow-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}