:root {
  --ink: #101820;
  --ink-soft: #2a3640;
  --muted: #5c6b75;
  --paper: #eef2f4;
  --paper-deep: #d9e2e8;
  --steel: #1a3a4a;
  --teal: #0f6e6a;
  --copper: #b86b34;
  --hero-ink: #f3f6f8;
  --hero-muted: rgba(243, 246, 248, 0.82);
  --font-brand: "Syne", sans-serif;
  --font-display: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --space: clamp(1.25rem, 3vw, 2.5rem);
  --max: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #c5d5de 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 20%, #d7e0e6 0%, transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  background-attachment: fixed;
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.2rem);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--teal);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--steel);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* —— Hero: one composition, brand-first, full-bleed —— */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--hero-ink);
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  transform: scale(1.06);
  animation: hero-drift 28s ease-in-out infinite alternate;
  will-change: transform;
}

.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      180deg,
      rgba(8, 14, 18, 0.35) 0%,
      rgba(8, 14, 18, 0.55) 45%,
      rgba(8, 14, 18, 0.88) 100%
    ),
    radial-gradient(
      80% 60% at 20% 80%,
      rgba(15, 110, 106, 0.28) 0%,
      transparent 60%
    );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 7rem) 0 clamp(2.5rem, 6vh, 4rem);
}

.brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: clamp(3.4rem, 10vw, 7.5rem);
  letter-spacing: -0.04em;
  line-height: 0.92;
  color: var(--hero-ink);
}

.brand--footer {
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.headline {
  margin: 0 0 1rem;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 2.4vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.lede {
  margin: 0 0 1.75rem;
  max-width: 38ch;
  color: var(--hero-muted);
  font-size: clamp(1rem, 1.1vw + 0.85rem, 1.2rem);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  align-items: center;
}

.cta__primary,
.cta__secondary {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease,
    border-color 180ms ease;
}

.cta__primary {
  display: inline-flex;
  align-items: center;
  padding: 0.85rem 1.25rem;
  background: var(--copper);
  color: #fffaf5;
  border: 1px solid transparent;
}

.cta__primary:hover {
  background: #9a5526;
  color: #fffaf5;
  transform: translateY(-1px);
}

.cta__secondary {
  color: var(--hero-ink);
  border-bottom: 1px solid rgba(243, 246, 248, 0.45);
  padding-bottom: 0.15rem;
}

.cta__secondary:hover {
  color: #fff;
  border-color: #fff;
}

.section--close .cta__secondary {
  color: var(--ink-soft);
  border-bottom-color: rgba(16, 24, 32, 0.35);
}

.section--close .cta__secondary:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* —— Sections: one job each —— */

.section {
  padding: calc(var(--space) * 2.2) 0;
}

.section__inner {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
}

.section__inner--split {
  display: grid;
  gap: 2rem;
  align-items: end;
}

@media (min-width: 840px) {
  .section__inner--split {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.section__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(1.85rem, 3.5vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 18ch;
}

.section__lede {
  margin: 0;
  max-width: 42ch;
  color: var(--ink-soft);
}

.section--status {
  padding-top: calc(var(--space) * 1.8);
  padding-bottom: calc(var(--space) * 1.6);
}

.milestone-kicker {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}

.section--status .section__title {
  max-width: 22ch;
}

.milestone-log {
  margin-top: 1.75rem;
}

.section--journey {
  padding-top: calc(var(--space) * 1.4);
  background:
    linear-gradient(
      180deg,
      rgba(15, 110, 106, 0.06) 0%,
      transparent 40%
    );
}

.section--journey .section__title {
  max-width: 24ch;
}

.journey {
  margin-top: 2.5rem;
  display: grid;
  gap: 2.25rem;
}

@media (min-width: 900px) {
  .journey {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem 2rem;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .journey {
    grid-template-columns: repeat(4, 1fr);
  }
}

.journey__era-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}

.journey__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(16, 24, 32, 0.16);
}

.journey__list li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid rgba(16, 24, 32, 0.12);
  align-items: baseline;
}

.journey__gate {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--steel);
  letter-spacing: 0.02em;
}

.journey__text {
  font-size: 0.98rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

.journey__text code {
  font-size: 0.85em;
  color: var(--ink);
}

.journey__era[data-reveal]:nth-child(2) {
  transition-delay: 80ms;
}
.journey__era[data-reveal]:nth-child(3) {
  transition-delay: 160ms;
}
.journey__era[data-reveal]:nth-child(4) {
  transition-delay: 240ms;
}

.section--pillars {
  background:
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.35)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      rgba(26, 58, 74, 0.05) 47px,
      rgba(26, 58, 74, 0.05) 48px
    );
}

.pillars {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(16, 24, 32, 0.18);
}

.pillars__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid rgba(16, 24, 32, 0.18);
}

.pillars__tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--teal);
}

.pillars__body {
  display: grid;
  gap: 0.3rem;
  min-width: 0;
}

.pillars__name {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: -0.02em;
}

.pillars__why {
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--ink-soft);
  max-width: 46ch;
}

.pillars__note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

@media (max-width: 700px) {
  .pillars__item {
    grid-template-columns: auto 1fr;
    gap: 0.35rem 1rem;
  }

  .pillars__note {
    grid-column: 2;
  }
}

.section--proof {
  background: linear-gradient(135deg, var(--steel) 0%, #0f2a36 55%, #0a3d3a 100%);
  color: var(--hero-ink);
}

.section--proof .section__lede {
  color: rgba(243, 246, 248, 0.82);
}

.section__lede--follow {
  margin-top: 1.25rem;
}

.section--proof .section__lede--follow strong {
  color: var(--hero-ink);
  font-weight: 600;
}

.section--proof .section__lede--follow code {
  color: rgba(243, 246, 248, 0.95);
}

.theorem {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 1.15rem;
  line-height: 1.45;
}

.theorem p {
  margin: 0 0 1rem;
}

.theorem cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(243, 246, 248, 0.65);
}

.ship-code {
  margin: 2rem 0 0;
  padding: 1.25rem 1.35rem;
  overflow-x: auto;
  background: var(--ink);
  color: #d7e8e6;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  border-left: 3px solid var(--teal);
}

.ship-code code {
  font-family: inherit;
  font-size: inherit;
}

.footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid rgba(16, 24, 32, 0.12);
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  justify-content: space-between;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.footer a:hover {
  color: var(--teal);
}

/* —— Motion —— */

.reveal {
  opacity: 0;
  transform: translateY(1.1rem);
  animation: rise 900ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.reveal--delay-1 {
  animation-delay: 120ms;
}
.reveal--delay-2 {
  animation-delay: 240ms;
}
.reveal--delay-3 {
  animation-delay: 360ms;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.pillars__item[data-reveal]:nth-child(2) {
  transition-delay: 70ms;
}
.pillars__item[data-reveal]:nth-child(3) {
  transition-delay: 140ms;
}
.pillars__item[data-reveal]:nth-child(4) {
  transition-delay: 210ms;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes hero-drift {
  from {
    transform: scale(1.06) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.5%, -1%, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero__image,
  .reveal,
  [data-reveal] {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 640px) {
  .pillars__item {
    grid-template-columns: auto 1fr;
    gap: 0.35rem 0.85rem;
  }

  .pillars__note {
    grid-column: 2;
  }

  .footer {
    flex-direction: column;
  }
}