:root {
  --ink: #12151a;
  --paper: #f3efe6;
  --muted: #5c6570;
  --line: rgba(18, 21, 26, 0.12);
  --accent: #0f6e56;
  --accent-2: #c45c26;
  --code-bg: #1a1f27;
  --code-fg: #e8e2d6;
  --out-bg: #0e2a22;
  --out-fg: #d7f0e6;
  --warn: #7a3b12;
  --shadow: 0 24px 60px rgba(18, 21, 26, 0.08);
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "DM Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(15, 110, 86, 0.14), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(196, 92, 38, 0.12), transparent 50%),
    linear-gradient(180deg, #f7f3ea 0%, var(--paper) 40%, #ebe6db 100%);
  line-height: 1.55;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.035;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hero, main, footer { position: relative; z-index: 1; }

.hero {
  max-width: 920px;
  margin: 0 auto;
  padding: 5.5rem 1.5rem 3rem;
  animation: rise 0.9s ease both;
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 9vw, 5.6rem);
  line-height: 0.95;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  margin: 0 0 1rem;
  max-width: 18ch;
  font-style: italic;
}

.lede {
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0 0 1.75rem;
}

.cta { display: flex; flex-wrap: wrap; gap: 0.7rem; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.05rem;
  border: 1px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #f4fff9; }
.btn.primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.strip {
  max-width: 920px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.strip.in { opacity: 1; transform: none; }
.strip > div {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}
.strip .k {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 400;
}
.strip em { font-style: normal; color: var(--muted); font-size: 0.9rem; }

main { max-width: 920px; margin: 0 auto; padding: 0 1.5rem 4rem; }

section { margin-bottom: 3.5rem; }

h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 2.6rem);
  margin: 0 0 0.5rem;
}

.section-lede { color: var(--muted); margin: 0 0 1.5rem; max-width: 40rem; }

.type-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.type-grid article {
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.type-grid article.in { opacity: 1; transform: none; }
.type-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
}
.type-grid p { margin: 0.25rem 0; color: var(--muted); font-size: 0.95rem; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
}

.code, .out {
  margin: 0 0 0.85rem;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.45;
  box-shadow: var(--shadow);
}
.code {
  background: var(--code-bg);
  color: var(--code-fg);
}
.out {
  background: var(--out-bg);
  color: var(--out-fg);
  border-left: 3px solid #3d9b78;
}
.code code, .out code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre;
}

.recipe {
  margin: 0 0 2.75rem;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.recipe.in { opacity: 1; transform: none; }
.recipe > header { margin-bottom: 0.85rem; }
.domain {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  font-weight: 600;
}
.recipe h3 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.75rem;
}
.note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- diagram figures ---------- */
.diagram {
  margin: 0 0 1.5rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  background: rgba(255, 252, 246, 0.72);
}
.diagram img {
  display: block;
  width: 100%;
  height: auto;
  border: 0;
}
.diagram figcaption {
  margin: 0.65rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- domain model cards ---------- */
.model-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1rem 0 1.5rem;
}
.model-card {
  margin: 0;
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(15, 110, 86, 0.07), transparent 50%),
    #fffdf8;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.model-card.in { opacity: 1; transform: none; }
.model-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.45rem;
}
.model-card .meta {
  margin: 0 0 0.55rem;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.45;
}
.model-card .path {
  display: block;
  margin: 0 0 0.55rem;
  padding: 0.4rem 0.55rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  background: var(--code-bg);
  color: var(--code-fg);
  overflow-x: auto;
  white-space: nowrap;
}
.model-card .score {
  display: inline-block;
  margin: 0 0 0.35rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(15, 110, 86, 0.1);
  border-radius: 0.3rem;
  padding: 0.12rem 0.4rem;
  font-size: 0.85rem;
}
.model-card.featured {
  border-color: rgba(15, 110, 86, 0.4);
  grid-column: 1 / -1;
}
@media (max-width: 720px) {
  .model-grid { grid-template-columns: 1fr; }
  .model-card.featured { grid-column: auto; }
}
.warn {
  color: var(--warn);
  font-size: 0.92rem;
  margin: 0 0 0.85rem;
  font-weight: 500;
}

/* ---------- pipeline workflow ---------- */
.flow {
  margin: 0 0 1.75rem;
  padding: 1.35rem 1.2rem 1.5rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(165deg, rgba(15, 110, 86, 0.06), transparent 45%),
    rgba(255, 252, 246, 0.72);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.flow.in { opacity: 1; transform: none; }

.flow-step {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  background: #fffdf8;
}
.flow-step strong {
  display: block;
  font-size: 1rem;
  font-weight: 600;
}
.flow-step em {
  display: block;
  font-style: normal;
  color: var(--muted);
  font-size: 0.88rem;
  margin-top: 0.15rem;
}
.flow-step-accent {
  border-color: rgba(15, 110, 86, 0.35);
  background: linear-gradient(120deg, rgba(15, 110, 86, 0.12), #fffdf8 70%);
}
.flow-step-done {
  border-color: rgba(15, 110, 86, 0.45);
  background: rgba(15, 110, 86, 0.08);
}
.flow-icon {
  flex: 0 0 2.4rem;
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  color: var(--accent);
  border: 1px solid rgba(15, 110, 86, 0.25);
  background: rgba(15, 110, 86, 0.08);
}
.flow-icon svg { width: 1.2rem; height: 1.2rem; }
.flow-arrow {
  width: 2px;
  height: 1.1rem;
  margin: 0.15rem auto;
  background: linear-gradient(180deg, rgba(18, 21, 26, 0.35), rgba(18, 21, 26, 0.08));
  position: relative;
}
.flow-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -3px;
  width: 7px;
  height: 7px;
  border-right: 2px solid rgba(18, 21, 26, 0.35);
  border-bottom: 2px solid rgba(18, 21, 26, 0.35);
  transform: translateX(-50%) rotate(45deg);
}
.flow-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0.35rem;
  position: relative;
}
.flow-split::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: rgba(18, 21, 26, 0.12);
}
.flow-branch {
  display: flex;
  flex-direction: column;
  padding-top: 0.85rem;
}
.flow-branch-label {
  align-self: flex-start;
  margin-bottom: 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent-2);
}

/* ---------- architecture diagram ---------- */
.arch-flow {
  margin: 0 0 1.25rem;
  padding: 1.25rem 1rem 1.4rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(200deg, rgba(196, 92, 38, 0.07), transparent 40%),
    rgba(255, 252, 246, 0.72);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.arch-flow.in { opacity: 1; transform: none; }
.arch-row { display: grid; gap: 1rem; }
.arch-lane {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.35rem;
  padding: 0.75rem;
  border: 1px dashed rgba(18, 21, 26, 0.14);
  background: rgba(255, 253, 248, 0.85);
}
.arch-lane-tag {
  flex: 0 0 100%;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.15rem;
}
.arch-node {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.86rem;
  font-weight: 500;
}
.arch-node code {
  font-size: 0.78rem;
  color: var(--accent);
}
.arch-node-score {
  padding: 0.8rem 1rem;
  border-color: rgba(15, 110, 86, 0.4);
  background: linear-gradient(120deg, rgba(15, 110, 86, 0.12), #fff 65%);
}
.arch-node-score strong { display: block; font-size: 0.98rem; }
.arch-node-score em {
  display: block;
  font-style: normal;
  color: var(--muted);
  font-size: 0.84rem;
  margin-top: 0.2rem;
}
.arch-icon {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--accent);
  display: inline-flex;
}
.arch-icon svg { width: 100%; height: 100%; }
.arch-chevron {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid rgba(18, 21, 26, 0.28);
  border-bottom: 2px solid rgba(18, 21, 26, 0.28);
  transform: rotate(-45deg);
  margin: 0 0.1rem;
}
.arch-merge {
  margin-top: 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}
.arch-merge-lines {
  width: min(70%, 420px);
  height: 18px;
  border-left: 2px solid rgba(18, 21, 26, 0.16);
  border-right: 2px solid rgba(18, 21, 26, 0.16);
  border-bottom: 2px solid rgba(18, 21, 26, 0.16);
  border-radius: 0 0 10px 10px;
}

.bullets {
  padding-left: 1.1rem;
  color: var(--muted);
}
.bullets li { margin-bottom: 0.45rem; }

footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
footer a { color: var(--ink); }
footer .small { font-size: 0.85rem; }

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 720px) {
  .strip, .type-grid, .flow-split { grid-template-columns: 1fr; }
  .flow-split::before { display: none; }
  .hero { padding-top: 3.5rem; }
  .arch-lane { gap: 0.45rem; }
}