/* ─── Agentic Schematics — styles ─────────────────────────────
   Design language borrowed from omp.sh: pure black, ink grayscale,
   hairline rules, magenta accent, Geist + JetBrains Mono. Flat. */

:root {
  --bg: #000;
  --bg-elev: #0a0a0c;
  --fg: oklch(97% 0 0);
  --fg-dim: oklch(82% .005 280);
  --fg-faint: oklch(50% .008 280);
  --rule: rgba(255, 255, 255, .08);
  --rule-strong: rgba(255, 255, 255, .14);
  --accent: oklch(70% .24 340);
  --accent-2: oklch(81% .14 200);
  --selection: oklch(70% .24 340 / .32);
  --sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 350;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--selection); }
a { color: var(--accent); text-decoration: none; }
.code-inline { margin: 0.8rem 0; }
.code-inline code { font-size: 0.9em; color: var(--fg); padding: 0.3em 0.6em; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}
.muted { color: var(--fg-faint); }

/* ─── Nav ──────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-brand {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.nav-brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 1.4rem; }
.nav-links a { color: var(--fg-dim); font-size: 0.9rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-cta {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--fg);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  padding: 0.35rem 0.8rem;
  transition: border-color 0.15s;
}
.nav-cta:hover { border-color: var(--accent); text-decoration: none; }

main { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }

/* ─── Hero ─────────────────────────────────────────────────── */
.hero { padding: 6rem 0 4.5rem; }
.hero-kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 1.2rem;
}
.hero-title {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 1.2rem;
}
.hero-title em { font-style: normal; color: var(--accent); }
.hero-sub {
  color: var(--fg-dim);
  font-size: 1.05rem;
  max-width: 44rem;
  margin-bottom: 2rem;
}
.hero-sub em { font-style: normal; color: var(--fg); font-weight: 450; }
.hero-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 3rem; }
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 6px;
  padding: 0.6rem 1.3rem;
  transition: opacity 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--fg); color: var(--bg); }
.btn-primary:hover { opacity: 0.85; }
.btn-ghost { border: 1px solid var(--rule-strong); color: var(--fg); }
.btn-ghost:hover { border-color: var(--accent); }
.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
}
.stat-num {
  display: block;
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--fg);
}
.stat-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

/* ─── Sections ─────────────────────────────────────────────── */
.section { padding: 3.5rem 0; border-top: 1px solid var(--rule); }
.section-title {
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.9rem;
}
.section-lede {
  color: var(--fg-dim);
  max-width: 44rem;
  margin-bottom: 2rem;
}
.section-lede strong { color: var(--fg); font-weight: 450; }

/* The catalog grid is a labelled subset of the catalog, so the note under the
   section lede names the subset and the total before the cards. Small and
   monospaced to read as a caption on the grid, not as another lede. */
.catalog-note {
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.85rem;
  margin: -1.2rem 0 1.6rem;
}
.catalog-note strong { color: var(--fg-dim); font-weight: 500; }

/* Feature grid: dense term + definition */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem 2.5rem;
}
.feature h3 {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 0.25rem;
}
.feature p { color: var(--fg-faint); font-size: 0.92rem; line-height: 1.55; }

/* Flow steps */
.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.flow-num {
  display: block;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.flow h3 { font-size: 1rem; font-weight: 500; margin-bottom: 0.35rem; }
.flow p { color: var(--fg-faint); font-size: 0.92rem; }
.flow code { color: var(--fg-dim); }

/* Code window */
.code-window {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  max-width: 46rem;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--rule);
}
.code-title {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--fg-faint);
  margin-left: 0.4rem;
}
.code-body {
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--fg-dim);
}

/* ─── Catalog ──────────────────────────────────────────────── */
.catalog { display: grid; gap: 1rem; }
.catalog-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  transition: border-color 0.15s;
}
.catalog-card:hover { border-color: var(--rule-strong); }
.cat-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.3rem;
}
.cat-head h3 { font-size: 1.05rem; font-weight: 500; letter-spacing: -0.01em; }
.cat-kind {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  white-space: nowrap;
}
.cat-kind.kind-authoring { color: var(--accent); border-color: var(--accent); }
.cat-kind.kind-featured { color: var(--accent-2); border-color: var(--accent-2); }
.cat-kind.kind-composes { color: var(--fg-dim); border-color: var(--rule); }
.cat-desc { color: var(--fg-dim); font-size: 0.92rem; margin-bottom: 0.8rem; }
.cat-meta {
  display: flex;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg-faint);
  margin-bottom: 0.9rem;
}
.cat-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.cat-btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--fg);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s, opacity 0.15s;
}
.cat-btn:hover { border-color: var(--accent); text-decoration: none; }
.cat-btn.primary { background: var(--fg); border-color: var(--fg); color: var(--bg); }
.cat-btn.primary:hover { opacity: 0.85; }
.cat-btn:disabled { opacity: 0.5; cursor: wait; }
.catalog-empty {
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.85rem;
  border: 1px dashed var(--rule);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
}

/* ─── Spec section ─────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
.grid-2 h3 {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
}
.principles { list-style: none; }
.principles li {
  color: var(--fg-dim);
  font-size: 0.9rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--rule);
}
.principles li:last-child { border-bottom: none; }
.principles li strong { color: var(--fg); font-weight: 500; }
.principles ol li::before {
  content: counter(list-item, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-right: 0.6rem;
}
.grid-2 p { color: var(--fg-faint); font-size: 0.9rem; margin-top: 0.8rem; }

/* ─── Footer ───────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--rule); margin-top: 2rem; }
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--fg-faint);
}
.footer-inner a { color: var(--fg-dim); }
.footer-inner a:hover { color: var(--fg); }

/* ─── Toast ────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translate(-50%, 0.5rem);
  background: var(--bg-elev);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  padding: 0.6rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--fg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 20;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { border-color: var(--accent); color: var(--accent); }

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 760px) {
  .nav-links { display: none; }
  .hero { padding: 4rem 0 3.5rem; }
  .grid-3, .flow, .grid-2 { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
}

/* plain-words: the layperson strip under the What lede */
.plain-words {
  border-left: 2px solid var(--accent);
  padding: 0.9rem 1.2rem;
  margin: 1.6rem 0 2.2rem;
  background: var(--bg-elev);
  max-width: 62rem;
}
.plain-words p { margin: 0; color: var(--fg); font-size: 1.02rem; line-height: 1.65; }