/* Hallmark · Cobalt-inspired · Narrative Workflow
   pre-emit critique: P5 H4 E4 S4 R4 V4
   Macrostructure: 14-narrative-workflow (index); long-document (inner) */

:root {
  --color-paper: oklch(98.5% 0.004 250);
  --color-ink: oklch(24% 0.02 258);
  --color-ink-soft: oklch(34% 0.018 257);
  --color-muted: oklch(52% 0.02 257);
  --color-rule: oklch(88% 0.01 250);
  --color-graphite: oklch(22% 0.016 260);
  --color-graphite-ink: oklch(92% 0.01 250);
  --color-accent: oklch(58% 0.20 256);
  --color-accent-soft: oklch(94% 0.04 256);
  --color-ok: oklch(55% 0.12 150);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --max: 68rem;
  --nav-h: 3.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-ink-soft);
  background: var(--color-paper);
  background-image:
    radial-gradient(ellipse 80% 50% at 100% -10%, oklch(94% 0.03 256 / 0.7), transparent),
    linear-gradient(180deg, var(--color-paper), oklch(97% 0.008 250));
  min-height: 100%;
}

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

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-style: normal;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  line-height: 1.15;
  overflow-wrap: anywhere;
  min-width: 0;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 3.75rem);
  font-weight: 600;
  margin: 0 0 var(--space-3);
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  font-weight: 600;
  margin: 0 0 var(--space-3);
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: var(--space-4) 0 var(--space-2);
}

p {
  margin: 0 0 var(--space-3);
}

.lead {
  font-size: 1.2rem;
  color: var(--color-ink-soft);
  max-width: 40rem;
}

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

code {
  background: var(--color-accent-soft);
  color: var(--color-ink);
  padding: 0.1em 0.35em;
  border-radius: 0.2em;
}

pre {
  background: var(--color-graphite);
  color: var(--color-graphite-ink);
  padding: var(--space-4);
  border: 1px solid oklch(30% 0.02 260);
  overflow-x: auto;
  margin: 0 0 var(--space-4);
  line-height: 1.5;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Nav — edge-aligned minimal */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: oklch(98.5% 0.004 250 / 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-rule);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--space-4);
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand:hover {
  color: var(--color-accent);
}

.brand span {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-rule);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1rem;
  align-items: center;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-muted);
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-block;
  }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 0 0 var(--space-3);
    gap: var(--space-2);
  }
  .site-header__inner {
    flex-wrap: wrap;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }
  .site-header.is-open .site-nav {
    display: flex;
  }
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-7);
}

/* Hero — photographic + brand-first */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--space-5);
  align-items: end;
  min-height: min(78vh, 40rem);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-rule);
  margin-bottom: var(--space-6);
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 7rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.9;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}

.hero__brand em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__visual {
  position: relative;
  min-width: 0;
}

.hero__visual img {
  width: 100%;
  max-height: min(52vh, 28rem);
  object-fit: contain;
  object-position: bottom right;
  filter: contrast(1.02);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
    gap: var(--space-4);
  }
  .hero__visual {
    order: -1;
  }
  .hero__visual img {
    max-height: 40vh;
    margin-inline: auto;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--color-ink);
  text-decoration: none;
  color: var(--color-paper);
  background: var(--color-ink);
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.btn:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-paper);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--ghost {
  background: transparent;
  color: var(--color-ink);
}

.btn--ghost:hover {
  background: var(--color-accent-soft);
  color: var(--color-ink);
  border-color: var(--color-accent);
}

/* Stages */
.stage {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-top: 3px solid var(--color-ink);
}

.stage__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  padding-top: 0.35rem;
}

.stage__body h2 {
  margin-top: 0;
}

@media (max-width: 768px) {
  .stage {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2);
  }
}

.flow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  background: var(--color-graphite);
  color: var(--color-graphite-ink);
  padding: var(--space-4);
  border: 1px solid oklch(30% 0.02 260);
  overflow-x: auto;
  white-space: pre;
}

.flow .accent {
  color: oklch(75% 0.14 256);
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 var(--space-4);
  border: 1px solid var(--color-rule);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 36rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--color-rule);
  vertical-align: top;
}

th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  background: oklch(96.5% 0.008 250);
  font-weight: 500;
}

tr:last-child td {
  border-bottom: none;
}

.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--color-rule);
  color: var(--color-ink-soft);
}

.chip--ok {
  border-color: oklch(70% 0.08 150);
  color: var(--color-ok);
  background: oklch(96% 0.03 150);
}

.chip--exp {
  border-color: oklch(75% 0.08 256);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.note {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-2) var(--space-3);
  margin: 0 0 var(--space-4);
  background: var(--color-accent-soft);
  color: var(--color-ink-soft);
}

.page-head {
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-5);
}

.page-head .mono-label {
  display: block;
  margin-bottom: var(--space-2);
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: minmax(0, 1fr);
  }
}

.ban {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4);
}

.ban li {
  border-top: 1px solid var(--color-rule);
  padding: var(--space-3) 0;
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: var(--space-3);
}

.ban strong {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
}

@media (max-width: 768px) {
  .ban li {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }
}

.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: var(--space-5) var(--space-4);
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: var(--color-muted);
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer__disclaimer {
  margin: 0;
  max-width: 42rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: normal;
  text-transform: none;
  line-height: 1.5;
}

.site-footer a {
  color: var(--color-muted);
  text-decoration: none;
}

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

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

.cta-band {
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px solid var(--color-ink);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
}

.cta-band h2 {
  margin: 0;
  font-size: 1.5rem;
}

/* Excalidraw-ish flow diagram */
.diagram-block {
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-rule);
}

.diagram-block--in-stage {
  margin: var(--space-5) 0;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
}

.diagram-block--in-stage .diagram-block__head h3 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.md-body {
  max-width: 48rem;
}

.md-body h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--color-ink);
  margin: var(--space-5) 0 var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
}

.md-body h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.md-body h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: var(--space-4) 0 var(--space-2);
}

.md-body ul {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
}

.md-body li {
  margin: 0.35rem 0;
}

.md-body p {
  margin: 0 0 var(--space-3);
}

.md-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.diagram-block__head {
  margin-bottom: var(--space-4);
}

.diagram-block__head h2 {
  margin-bottom: var(--space-2);
}

.diagram-frame {
  margin: 0;
  padding: var(--space-2);
  background:
    radial-gradient(circle at 12% 18%, oklch(94% 0.03 256 / 0.55), transparent 42%),
    radial-gradient(circle at 88% 70%, oklch(94% 0.04 40 / 0.45), transparent 40%),
    oklch(97% 0.01 85);
  border: 1px dashed oklch(70% 0.03 250);
  border-radius: 0.35rem;
  overflow: visible;
}

.diagram-frame svg,
.diagram-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: none;
  margin: 0 auto;
}

.diagram-caption {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.demo-block {
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-rule);
}

.demo-block--in-stage {
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-rule);
  border-bottom: none;
  padding-bottom: 0;
}

.demo-block__head {
  max-width: 40rem;
  margin-bottom: var(--space-4);
}

.demo-block__head h2,
.demo-block__head h3 {
  margin: 0 0 var(--space-2);
}

.demo-block--in-stage .demo-block__head h3 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  color: var(--color-ink);
}

.demo-block__links {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}

.video-frame {
  margin: 0;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-graphite);
  border: 1px solid var(--color-rule);
  overflow: hidden;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.shot-frame {
  margin: 0;
  width: 100%;
  background: var(--color-graphite);
  border: 1px solid var(--color-rule);
  overflow: hidden;
}

.shot-frame img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.shot-frame .diagram-caption {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-paper);
  border-top: 1px solid var(--color-rule);
}

/* Configure docs layout */
.doc-layout {
  display: grid;
  grid-template-columns: 14.5rem minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.doc-side {
  position: sticky;
  top: calc(var(--nav-h) + 0.75rem);
  border: 1px solid var(--color-rule);
  background: oklch(97.5% 0.006 250);
  padding: var(--space-3);
}

.doc-side__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 0 0 var(--space-2);
}

.doc-side nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.doc-side button {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.55rem 0.65rem;
  cursor: pointer;
  border-left: 2px solid transparent;
}

.doc-side button:hover {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.doc-side button[aria-current="true"] {
  color: var(--color-ink);
  border-left-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.doc-side button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.doc-side__hint {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--color-muted);
}

.doc-panel[hidden] {
  display: none;
}

.doc-panel > h2:first-child {
  margin-top: 0;
}

.doc-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-rule);
}

.doc-subnav a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-muted);
}

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

.field-block {
  margin-bottom: var(--space-5);
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}

.field-block h3 {
  margin-top: 0;
}

@media (max-width: 900px) {
  .doc-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-side {
    position: static;
  }

  .doc-side nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .doc-side button {
    width: auto;
    border-left: none;
    border-bottom: 2px solid transparent;
  }

  .doc-side button[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--color-accent);
  }
}