:root {
  --ink: #15231f;
  --ink-soft: #3a4a44;
  --paper: #eef3ef;
  --mist: #d7e4dc;
  --fog: #c5d5ce;
  --panel: rgba(248, 251, 249, 0.82);
  --line: rgba(21, 35, 31, 0.14);
  --accent: #0f6b5c;
  --accent-deep: #0a4a40;
  --ready: #1f6b45;
  --abstain: #8a6a18;
  --blocked: #8f2f2f;
  --font-display: "Syne", "Avenir Next", sans-serif;
  --font-body: "Literata", "Iowan Old Style", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 68rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  background:
    radial-gradient(ellipse 90% 60% at 8% -10%, rgba(15, 107, 92, 0.18), transparent 55%),
    radial-gradient(ellipse 70% 50% at 92% 8%, rgba(90, 120, 110, 0.16), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(197, 213, 206, 0.55), transparent 60%),
    linear-gradient(165deg, #e8efe9 0%, #f2f6f3 42%, #dfeae4 100%);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-deep);
  text-underline-offset: 0.15em;
}

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

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--paper);
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  padding: 0.85rem clamp(1rem, 3vw, 2rem);
  background: rgba(238, 243, 239, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 560;
}

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

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

/* —— Hero: one composition —— */
.hero {
  position: relative;
  min-height: min(100svh, 56rem);
  display: grid;
  grid-template-columns: 1fr;
  align-items: stretch;
  overflow: hidden;
  isolation: isolate;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(238, 243, 239, 0.94) 0%, rgba(238, 243, 239, 0.55) 42%, rgba(215, 228, 220, 0.2) 100%),
    url("assets/architecture.svg") right 8% center / min(72vw, 52rem) auto no-repeat;
  opacity: 0.95;
  animation: drift 18s var(--ease) infinite alternate;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-1.2%, 0.8%, 0) scale(1.03); }
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.1rem;
  padding: clamp(2.5rem, 8vh, 5rem) clamp(1.25rem, 4vw, 3rem);
  max-width: 38rem;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 8vw, 4.6rem);
  letter-spacing: -0.045em;
  line-height: 0.95;
  color: var(--ink);
  animation: rise 0.9s var(--ease) both;
}

.brand span {
  display: block;
  font-size: 0.32em;
  font-weight: 620;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.55rem;
}

.headline {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
  max-width: 18ch;
  animation: rise 0.9s var(--ease) 0.08s both;
}

.lede {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 34rem;
  animation: rise 0.9s var(--ease) 0.14s both;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.35rem;
  animation: rise 0.9s var(--ease) 0.2s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.72rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 0.92rem;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

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

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #f7fbf9;
}

.btn-primary:hover {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
  color: #fff;
}

.btn-secondary {
  background: var(--panel);
  color: var(--ink);
}

.btn-secondary:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 16rem;
  margin: 0 clamp(1rem, 3vw, 2rem) clamp(1.5rem, 4vh, 2.5rem);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  animation: rise 1s var(--ease) 0.18s both;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  min-height: 18rem;
}

.hero-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0.55rem 0.85rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 560;
  color: var(--ink-soft);
  background: linear-gradient(transparent, rgba(238, 243, 239, 0.92));
}

@keyframes rise {
  from {
    transform: translateY(12px);
  }
  to {
    transform: translateY(0);
  }
}

@media (max-width: 899px) {
  .hero-atmosphere {
    background:
      radial-gradient(ellipse 80% 50% at 10% 0%, rgba(15, 107, 92, 0.14), transparent 55%),
      radial-gradient(ellipse 60% 40% at 100% 20%, rgba(90, 120, 110, 0.12), transparent 50%),
      linear-gradient(165deg, rgba(232, 239, 233, 0.95), rgba(242, 246, 243, 0.9));
    animation: none;
  }

  .hero-visual {
    margin-top: 0.5rem;
  }
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(20rem, 0.95fr) minmax(22rem, 1.15fr);
    min-height: 100svh;
  }

  .hero-copy {
    padding-right: 1rem;
  }

  .hero-visual {
    margin: clamp(4rem, 10vh, 6rem) clamp(1.5rem, 3vw, 2.5rem) clamp(4rem, 10vh, 6rem) 0;
    align-self: center;
    min-height: 28rem;
  }

  .hero-visual img {
    min-height: 28rem;
  }
}

/* —— Sections —— */
main section {
  padding: clamp(3rem, 8vh, 5.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 720;
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section-lede {
  margin: 0 0 1.75rem;
  color: var(--ink-soft);
  max-width: 40rem;
}

.split {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 760px) {
  .split.two {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

.type-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.type-list li {
  padding: 0;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.type-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.type-list p {
  margin: 0;
  color: var(--ink-soft);
}

.path-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1.5rem;
}

@media (max-width: 700px) {
  .path-strip {
    grid-template-columns: 1fr 1fr;
  }
}

.path-item {
  padding: 0.85rem 0.9rem;
  border-left: 3px solid var(--accent);
  background: transparent;
}

.path-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.path-item span {
  display: block;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-weight: 620;
  font-size: 0.92rem;
}

.status-row .ready { color: var(--ready); }
.status-row .abstain { color: var(--abstain); }
.status-row .blocked { color: var(--blocked); }

/* Interactive demo picker — cards only for interaction */
.demo-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.demo-tabs button {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 0.3rem;
  padding: 0.55rem 0.95rem;
  font-family: var(--font-display);
  font-weight: 620;
  font-size: 0.88rem;
}

.demo-tabs button[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #f4f8f6;
}

.demo-panel {
  display: none;
  gap: 1.25rem;
}

.demo-panel.is-active {
  display: grid;
}

@media (min-width: 800px) {
  .demo-panel.is-active {
    grid-template-columns: 1.2fr 0.9fr;
    align-items: start;
  }
}

.demo-shot {
  border: 1px solid var(--line);
  background: #f7faf8;
  overflow: hidden;
}

.demo-shot img {
  width: 100%;
}

.demo-copy h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.demo-copy p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

pre,
.code {
  margin: 0;
  padding: 0.95rem 1rem;
  overflow-x: auto;
  background: #15231f;
  color: #e6efe9;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.45;
  border-radius: 0.3rem;
}

.install pre {
  margin-top: 0.75rem;
}

.install .hint {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.links-grid {
  display: grid;
  gap: 0.85rem;
}

.links-grid a {
  font-family: var(--font-display);
  font-weight: 620;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.55rem;
}

.links-grid a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.site-footer {
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 3rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-footer .section-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
}

.site-footer a {
  color: var(--ink-soft);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-atmosphere,
  .brand,
  .headline,
  .lede,
  .cta-group,
  .hero-visual {
    animation: none !important;
  }
  .btn:hover { transform: none; }
}