/* TZD Labs · Systems — Design System Override */

:root {
  --paper: #f5f1eb;
  --ink: #1a1917;
  --ink-light: #6b6560;
  --accent: #b84c2a;
  --accent-warm: #d4704f;
  --rule: #c8c2b8;
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
}

/* ── Base ────────────────────────────────────────────────────────────────── */

html, body {
  background: var(--paper) !important;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

/* Override all framework background variables */
:root {
  --theme-background: var(--paper);
  --theme-background-alt: var(--paper);
  --theme-foreground: var(--ink);
  --theme-foreground-focus: var(--ink);
  --theme-foreground-muted: var(--ink-light);
}

/* ── Header / navbar ────────────────────────────────────────────────────── */

#observablehq-header {
  background: var(--paper) !important;
  border-bottom: 1px solid var(--rule) !important;
  color: var(--ink) !important;
}

#observablehq-header a {
  color: var(--ink) !important;
  font-family: var(--sans);
  font-weight: 500;
}

#observablehq-header button,
#observablehq-header svg {
  color: var(--ink) !important;
  fill: var(--ink) !important;
}

/* ── Sidebar / nav ──────────────────────────────────────────────────────── */

#observablehq-sidebar {
  background: var(--paper) !important;
  border-right: 1px solid var(--rule) !important;
  color: var(--ink) !important;
}

#observablehq-sidebar a {
  color: var(--ink) !important;
  font-family: var(--sans);
  font-size: 14px;
}

#observablehq-sidebar a[aria-current="page"],
#observablehq-sidebar a.active {
  color: var(--accent) !important;
  font-weight: 500;
  background: color-mix(in srgb, var(--accent) 8%, transparent) !important;
  border-radius: 3px;
}

#observablehq-sidebar section > ol,
#observablehq-sidebar section > ul {
  border-left: 1px solid var(--rule) !important;
}

#observablehq-sidebar summary {
  color: var(--ink-light) !important;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Typography ─────────────────────────────────────────────────────────── */

h1, h2, h3, h4 {
  font-family: var(--serif) !important;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.25;
}

h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.75rem;
  margin-top: 2.5rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.3rem;
}

h3 {
  font-size: 1.25rem;
  font-weight: 400;
  font-style: italic;
  color: var(--ink-light);
  margin-top: 2rem;
}

p {
  max-width: 65ch;
  font-family: var(--sans);
  margin-bottom: 1.1rem;
}

/* Drop cap on first paragraph */
.prose-lead > p:first-child::first-letter {
  font-family: var(--serif);
  font-size: 3.5rem;
  font-weight: 600;
  float: left;
  line-height: 0.8;
  margin: 0.1rem 0.15rem 0 0;
  color: var(--accent);
}

/* ── Links ──────────────────────────────────────────────────────────────── */

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Cards / callouts ───────────────────────────────────────────────────── */

.observablehq-card {
  background: white;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

/* ── Charts ─────────────────────────────────────────────────────────────── */

figure {
  margin: 2rem 0;
}

figure img {
  max-width: 100%;
  border: 1px solid var(--rule);
  border-radius: 3px;
}

figcaption {
  font-size: 13px;
  color: var(--ink-light);
  margin-top: 0.5rem;
  max-width: 65ch;
  line-height: 1.5;
}

/* ── Scrollytelling layout ──────────────────────────────────────────────── */

/* Chart sticks full-width at top; prose scrolls beneath */
.scroll-hero {
  position: relative;
  margin: 2rem 0;
}

.scroll-hero-chart {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--paper);
  padding: 1.25rem 0 0.75rem;
  border-bottom: 1px solid var(--rule);
}

.scroll-steps {
  padding: 0;
}

.scroll-step {
  padding: 0.9rem 0 0 1.2rem;
  border-left: 3px solid transparent;
  color: var(--ink-light);
  transition: color 0.3s ease, border-left-color 0.3s ease;
  max-width: 65ch;
}

.scroll-step.is-active {
  color: var(--ink);
  border-left-color: var(--accent);
}

.scroll-step p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: inherit;
  margin-bottom: 0;
}

/* Bold company name inline at start of each step */
.scroll-step strong {
  color: inherit;
  font-weight: 600;
}

/* ── Dividers ───────────────────────────────────────────────────────────── */

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

/* ── Source / byline ────────────────────────────────────────────────────── */

.byline {
  font-size: 14px;
  color: var(--ink-light);
  font-family: var(--sans);
  font-style: italic;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1rem;
}

/* ── Tooltip overrides ──────────────────────────────────────────────────── */

[data-tooltip] {
  font-family: var(--sans);
  font-size: 13px;
}

/* ── Revenue theses card grid ────────────────────────────────────────────── */

.thesis-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.thesis-card {
  padding: 1rem 1.1rem;
  border-radius: 4px;
  border-left: 3px solid transparent;
}

.thesis-card .thesis-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.thesis-card strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.thesis-card p {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-light);
  margin: 0;
  max-width: none;
}

.thesis-near {
  background: color-mix(in srgb, var(--paper) 40%, #e8f4ec);
  border-left-color: #4a8c55;
}

.thesis-near .thesis-label { color: #4a8c55; }

.thesis-medium {
  background: color-mix(in srgb, var(--paper) 40%, #f4f0e8);
  border-left-color: #8c7a40;
}

.thesis-medium .thesis-label { color: #8c7a40; }

.thesis-long {
  background: color-mix(in srgb, var(--paper) 40%, #f4ecec);
  border-left-color: var(--accent);
}

.thesis-long .thesis-label { color: var(--accent); }

@media (max-width: 640px) {
  .thesis-grid { grid-template-columns: 1fr; }
}

/* ── Homepage hero ──────────────────────────────────────────────────────── */

.home-hero {
  padding: 3rem 0 2rem;
  max-width: 780px;
}

.home-hero-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-light);
  font-family: var(--sans);
  font-weight: 500;
  margin-bottom: 1rem;
}

.home-hero-title {
  font-family: var(--serif) !important;
  font-size: 3.2rem !important;
  font-weight: 600 !important;
  line-height: 1.1 !important;
  color: var(--ink) !important;
  margin: 0 0 1.25rem !important;
  border: none !important;
  padding: 0 !important;
}

.home-hero-sub {
  font-family: var(--sans);
  font-size: 1.1rem;
  color: var(--ink-light);
  line-height: 1.65;
  max-width: 62ch;
  margin: 0;
}

/* ── Article grid ───────────────────────────────────────────────────────── */

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}

.article-card {
  display: block;
  padding: 1.4rem 1.5rem;
  border-radius: 4px;
  border: 1px solid var(--rule);
  text-decoration: none !important;
  color: var(--ink) !important;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

a.article-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(184, 76, 42, 0.08);
  text-decoration: none !important;
}

.article-active {
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--paper) 60%, #fff);
}

.article-scoping {
  opacity: 0.72;
  background: var(--paper);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.article-id {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-light);
  font-family: var(--sans);
  font-weight: 500;
}

.article-status {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--sans);
  font-weight: 500;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding: 1px 6px;
  border-radius: 2px;
}

.article-status-scoping {
  color: var(--ink-light);
  background: color-mix(in srgb, var(--ink-light) 10%, transparent);
}

.article-title {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.25;
  margin-bottom: 0.15rem;
}

.article-subtitle {
  font-size: 12px;
  color: var(--ink-light);
  font-family: var(--sans);
  margin-bottom: 0.75rem;
}

.article-desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-light);
  margin: 0 0 1rem !important;
  max-width: none !important;
}

.article-arc {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.arc-step {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
  color: var(--ink-light);
  font-family: var(--sans);
}

.arc-land {
  color: var(--accent);
}

.arc-arrow {
  color: var(--rule);
  font-size: 10px;
}

/* ── Analytical arc block ───────────────────────────────────────────────── */

.home-arc {
  margin: 1.5rem 0 2.5rem;
}

.home-arc-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-light);
  font-family: var(--sans);
  font-weight: 500;
  margin-bottom: 1.25rem;
}

.home-arc-chain {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.home-arc-step {
  flex: 1;
  padding-right: 1rem;
}

.arc-node {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.arc-desc {
  font-size: 12.5px;
  color: var(--ink-light);
  line-height: 1.55;
  font-family: var(--sans);
}

.arc-connector {
  font-size: 1.2rem;
  color: var(--rule);
  padding: 0 0.5rem;
  margin-top: 0.15rem;
  flex-shrink: 0;
}

@media (max-width: 720px) {
  .article-grid { grid-template-columns: 1fr; }
  .home-arc-chain { flex-direction: column; gap: 1.25rem; }
  .arc-connector { display: none; }
  .home-hero-title { font-size: 2.4rem !important; }
}

/* ── mountScrollChart sections ──────────────────────────────────────────── */
/* Chart + paragraph stick together at the top. The paragraph reads as        */
/* normal prose; scroll position through the section drives which sentence    */
/* is highlighted in sync with the chart. Extra section height provides       */
/* scroll distance so the reader moves through all sentences.                 */

.msc-section {
  position: relative;
  margin: 2rem 0 3rem;
}

/* Chart wrapper — positions the callout overlay */
.msc-content {
  position: relative;
}

/* Callout tooltip overlaying the chart — position set dynamically via JS */
.msc-callout {
  position: absolute;
  max-width: 34ch;
  padding: 0.45rem 0.7rem;
  background: rgba(245, 241, 235, 0.93);
  border-left: 2.5px solid var(--accent);
  border-radius: 0 3px 3px 0;
  font-family: var(--sans);
  font-size: clamp(0.72rem, 1.4vw, 0.88rem);
  line-height: 1.5;
  color: var(--ink);
  pointer-events: none;
  transition: opacity 0.25s ease;
}

/* Above-chart callout: normal flow, not overlaid */
.msc-callout.msc-callout-above {
  position: relative;
  top: auto; right: auto; bottom: auto; left: auto;
  border-left: none;
  padding-left: 0;
  border-radius: 0;
  max-width: 60ch;
  min-height: 3.2em;
  margin-bottom: 0.5rem;
}

/* Valuation callout — matches scroll-step prose sizing */
.val-callout {
  font-size: 1.05rem;
  line-height: 1.7;
  min-height: 4.5em;
}

/* Valuation chart: normal flow — JS handles lock/unlock to fixed when centered */
#sticky-valuation {
  position: relative;
  padding: 0.75rem 0;
}

/* Steps are invisible — JS drives step advancement via wheel events */
.val-callout-mode .scroll-step {
  display: none;
}

/* No extra padding — chart scrolls off naturally after unlock */
.val-callout-mode {
  padding-bottom: 0;
}

.val-callout-mode .scroll-step * {
  display: none;
}


/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .scroll-container {
    grid-template-columns: 1fr;
  }
  .scroll-sticky {
    position: relative;
    height: auto;
  }
}

@media (max-width: 640px) {
  .msc-callout {
    max-width: 22ch;
  }
}

@media (max-width: 480px) {
  .msc-callout {
    font-size: 0.78rem;
    max-width: 20ch;
    padding: 0.3rem 0.5rem;
  }
  .msc-callout.msc-callout-above {
    max-width: 100%;
    font-size: 0.88rem;
  }
  .scroll-step {
    padding-left: 0.8rem;
  }
}