:root {
  --ink: #0e1412;
  --ink-soft: #1c2823;
  --muted: #3a4742;
  --paper: #f4f6f4;
  --paper-deep: #e4eae6;
  --foam: #fbfcfb;
  --reef: #165445;
  --reef-deep: #0c3a31;
  --copper: #8a5f38;
  --line: rgba(14, 20, 18, 0.14);
  --shadow: 0 24px 60px rgba(14, 20, 18, 0.1);
  --display: "Syne", "Avenir Next", "Segoe UI", sans-serif;
  --sans: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --logo-seam: #f4f6f4;
  --content: min(68rem, calc(100% - clamp(1.5rem, 5vw, 3.5rem)));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.1rem;
  line-height: 1.6;
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

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

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--ink-soft);
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 45% at 90% 8%, rgba(22, 84, 69, 0.08), transparent 55%),
    linear-gradient(180deg, #f7f9f7 0%, var(--paper) 40%, #eef2ef 100%);
}

.ray {
  position: absolute;
  top: -10%;
  width: 28vw;
  max-width: 22rem;
  height: 120vh;
  background: linear-gradient(
    180deg,
    rgba(251, 252, 251, 0.7),
    rgba(251, 252, 251, 0)
  );
  filter: blur(18px);
  transform-origin: top center;
  opacity: 0.4;
  animation: ray-drift 18s var(--ease) infinite alternate;
}

.ray-a {
  left: 58%;
  transform: rotate(12deg);
}

.ray-b {
  left: 72%;
  width: 18vw;
  opacity: 0.35;
  animation-duration: 24s;
  animation-delay: -6s;
  transform: rotate(18deg);
}

.depth {
  position: absolute;
  inset: auto 0 0;
  height: 40vh;
  background: linear-gradient(transparent, rgba(15, 61, 52, 0.06));
}

@keyframes ray-drift {
  from {
    translate: 0 0;
  }
  to {
    translate: -2vw 1vh;
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: var(--content);
  margin: 0 auto;
  padding: 1rem 0;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  border-radius: 0;
}

.footer-brand img {
  width: 1.55rem;
  height: 1.55rem;
  object-fit: contain;
  border-radius: 0;
}

.brand-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-github {
  padding: 0.4rem 0.8rem;
  border: 1px solid color-mix(in srgb, var(--ink) 22%, transparent);
  border-radius: 999px;
  color: var(--ink);
  background: color-mix(in srgb, var(--foam) 70%, transparent);
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  width: 100%;
  min-height: calc(100svh - 4.5rem);
  padding: clamp(2rem, 6vh, 4rem) 0 clamp(3.5rem, 9vh, 5.5rem);
  overflow: clip;
}

.hero-plane {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-plane::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      90deg,
      var(--paper) 0%,
      var(--paper) 38%,
      color-mix(in srgb, var(--paper) 88%, transparent) 52%,
      color-mix(in srgb, var(--paper) 40%, transparent) 68%,
      transparent 84%
    ),
    linear-gradient(180deg, transparent 50%, color-mix(in srgb, var(--paper) 92%, transparent) 100%);
}

.hero-mark {
  position: absolute;
  right: max(-1vw, 0rem);
  top: 52%;
  width: min(52vw, 30rem);
  height: auto;
  translate: 0 -50%;
  opacity: 0.42;
  animation: mark-rise 1.4s var(--ease) both;
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: var(--content);
  margin: 0 auto;
  max-width: 36rem;
}

.hero-brand {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(3.4rem, 9vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  color: var(--ink);
}

.hero-line {
  margin: 0.85rem 0 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  letter-spacing: -0.02em;
  color: var(--ink-soft);
}

.hero-lede {
  margin: 1.15rem 0 0;
  max-width: 32rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.65rem 1.2rem;
  border-radius: 0.55rem;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition:
    transform 180ms var(--ease),
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

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

.btn-primary {
  background: var(--ink);
  color: var(--foam);
  border: 1px solid var(--ink);
}

.btn-primary:hover {
  background: var(--reef-deep);
  border-color: var(--reef-deep);
  color: var(--foam);
}

.btn-ghost {
  background: var(--foam);
  color: var(--ink);
  border: 1px solid color-mix(in srgb, var(--ink) 22%, transparent);
}

.btn-ghost:hover {
  border-color: color-mix(in srgb, var(--ink) 40%, transparent);
  color: var(--ink);
  background: var(--foam);
}

@keyframes mark-rise {
  from {
    opacity: 0;
    transform: translate(0, 1.25rem) scale(0.97);
  }
  to {
    opacity: 0.42;
    transform: none;
  }
}

.section {
  width: var(--content);
  margin: 0 auto;
  padding: clamp(3.5rem, 9vh, 6.5rem) 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.section h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.85rem, 3.8vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-lede {
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.65;
}

.policy {
  margin: 0;
  padding: 1.25rem 1.4rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--foam);
  box-shadow: none;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink);
}

.paths {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 0;
}

.path-label {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.path-keys {
  margin: 0.35rem 0 0;
  color: var(--reef-deep);
  font-weight: 600;
  font-size: 0.95rem;
}

.path-note {
  margin: 0.7rem 0 0;
  color: var(--ink-soft);
  max-width: 28rem;
  line-height: 1.6;
}

.agent-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  max-width: 44rem;
}

.agent-points li {
  display: grid;
  gap: 0.35rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.point-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.point-body {
  color: var(--ink-soft);
  line-height: 1.65;
}

.limits-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 42rem;
  display: grid;
  gap: 0;
}

.limits-list li {
  margin: 0;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.limits-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.limits-list em {
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
}

.start-flow {
  max-width: 46rem;
}

.terminal {
  margin: 0;
  padding: 1.25rem 1.4rem;
  overflow-x: auto;
  border-radius: 0.75rem;
  background: #10241f;
  color: #e8f2ed;
  box-shadow: none;
  font-size: 0.9rem;
  line-height: 1.65;
}

.start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.start-note {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.6;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  width: var(--content);
  margin: 0 auto;
  padding: 1.75rem 0 2.5rem;
  border-top: 1px solid var(--line);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--display);
  font-weight: 700;
}

.footer-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-meta a {
  color: inherit;
}

.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity 700ms var(--ease),
    transform 700ms var(--ease);
}

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

@media (max-width: 860px) {
  .hero {
    min-height: auto;
    padding-top: 0.5rem;
  }

  .hero-plane {
    position: relative;
    height: min(58vw, 20rem);
    margin-bottom: 0.5rem;
  }

  .hero-plane::after {
    background: linear-gradient(180deg, transparent 40%, var(--paper) 100%);
  }

  .hero-mark {
    position: absolute;
    right: 50%;
    top: 45%;
    width: min(64vw, 18rem);
    translate: 50% -50%;
    opacity: 0.5;
  }

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

  .site-nav a:not(.nav-github) {
    display: none;
  }
}

@media (max-width: 520px) {
  .hero-brand {
    font-size: clamp(2.8rem, 16vw, 3.6rem);
  }

  .hero-actions,
  .start-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

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

  .ray,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-mark {
    animation: none !important;
    transition: none !important;
    transform: none !important;
    opacity: 0.42;
  }
}