/* ─────────────────────────────────────────────────────────────────────────
   upgradeurbrain.com — design tokens + base
   ───────────────────────────────────────────────────────────────────────── */

:root {
  /* default palette: Cobalt */
  --bg: #f3ecdd;
  --bg-soft: #ebe2d2;
  --ink: #1d2940;
  --ink-2: #2a3a5a;
  --ink-3: #4a5670;
  --ink-4: #6a7388;
  --ink-5: #9aa3b8;
  --rule: rgba(29, 41, 64, 0.18);
  --rule-soft: rgba(29, 41, 64, 0.10);
  --accent: #b04832;       /* warm terracotta */
  --accent-ink: #f3ecdd;
  --grain: 0.045;          /* paper grain opacity */

  --serif: "Newsreader", "Source Serif 4", ui-serif, Georgia, serif;
  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --measure: 38rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* Palette: Ink / Terracotta */
[data-palette="ink"] {
  --bg: #f3eee4;
  --bg-soft: #ebe4d4;
  --ink: #1a1714;
  --ink-2: #2a2520;
  --ink-3: #4b443c;
  --ink-4: #6a6359;
  --ink-5: #968e83;
  --rule: rgba(26, 23, 20, 0.16);
  --rule-soft: rgba(26, 23, 20, 0.08);
  --accent: #b85a2e;
  --accent-ink: #f3eee4;
}

/* Palette: Moss / Rust */
[data-palette="moss"] {
  --bg: #efe9d8;
  --bg-soft: #e6dfca;
  --ink: #1f3a30;
  --ink-2: #2a4a3e;
  --ink-3: #455a52;
  --ink-4: #6b7a72;
  --ink-5: #9aa49d;
  --rule: rgba(31, 58, 48, 0.18);
  --rule-soft: rgba(31, 58, 48, 0.08);
  --accent: #a8633a;
  --accent-ink: #efe9d8;
}

/* Palette: Aubergine / Ochre */
[data-palette="plum"] {
  --bg: #efe6d3;
  --bg-soft: #e7dcc4;
  --ink: #2a1d3a;
  --ink-2: #3a2a4f;
  --ink-3: #524262;
  --ink-4: #786b87;
  --ink-5: #a39bae;
  --rule: rgba(42, 29, 58, 0.18);
  --rule-soft: rgba(42, 29, 58, 0.08);
  --accent: #b87a3a;
  --accent-ink: #efe6d3;
}

/* ─────────────────────────────────────────── reset + base ── */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss02";
}

::selection { background: var(--ink); color: var(--bg); }

a { color: inherit; text-decoration: none; }

/* paper grain — fixed under every section */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: var(--grain);
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ─────────────────────────────────────────── type scale ── */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; color: var(--ink); margin: 0; letter-spacing: -0.012em; text-wrap: balance; }
h1 { font-size: clamp(2rem, 3.6vw, 3.25rem); line-height: 1.05; font-variation-settings: "opsz" 36; }
h2 { font-size: clamp(2rem, 3.6vw, 3.25rem); line-height: 1.05; font-variation-settings: "opsz" 36; }
h3 { font-size: clamp(2rem, 3.6vw, 3.25rem); line-height: 1.1;  font-variation-settings: "opsz" 36; }
p  { margin: 0; }

.serif { font-family: var(--serif); }
.mono { font-family: var(--mono); }

.eyebrow {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2rem, 3.6vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.012em;
  text-transform: none;
  color: var(--ink-3);
  font-weight: 400;
  font-variation-settings: "opsz" 36;
}
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 10px;
  vertical-align: 0.18em;
}

.hairline {
  height: 1px;
  background: var(--rule);
  border: 0;
  margin: 0;
}

/* ─────────────────────────────────────────── layout ── */
section { position: relative; z-index: 2; padding: clamp(4rem, 10vh, 8rem) var(--gutter); }
.measure { max-width: var(--measure); margin: 0 auto; }
.measure-wide { max-width: 64rem; margin: 0 auto; }
.measure-xl { max-width: 78rem; margin: 0 auto; }

.bg-soft { background: var(--bg-soft); }
.bg-ink { background: var(--ink); color: var(--bg); }
.bg-ink h1, .bg-ink h2, .bg-ink h3 { color: var(--bg); }

/* ─────────────────────────────────────────── nav ── */
.nav {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--gutter);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  border-bottom: 1px solid var(--rule-soft);
}
.nav .mark {
  display: flex; align-items: center; gap: 10px;
  text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink);
  font-weight: 500;
}
.nav .mark svg { display: block; }
.nav .meta { color: var(--ink-4); display: flex; gap: 20px; }
.nav .meta .live { color: var(--accent); }
.nav .meta .live::before {
  content: ""; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--accent); margin-right: 8px; vertical-align: 0.12em;
  animation: blink 2.6s ease-in-out infinite;
}
@keyframes blink { 0%, 60%, 100% { opacity: 1 } 30% { opacity: 0.35 } }

/* ─────────────────────────────────────────── hero ── */
.hero { padding-top: clamp(3rem, 7vh, 6rem); padding-bottom: clamp(4rem, 10vh, 8rem); }
.hero-cred {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: end;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
  margin-bottom: 4rem;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.hero-cred .right { text-align: right; color: var(--ink-4); }
.hero-cred .book-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.6vw, 3.25rem);
  font-style: italic;
  font-variation-settings: "opsz" 36;
  letter-spacing: -0.012em;
  text-transform: none;
  color: var(--ink);
  line-height: 1.05;
}

.hero h1 {
  font-style: italic;
  font-variation-settings: "opsz" 60;
  margin-bottom: 2.5rem;
}
.hero h1 em { font-style: normal; }

.hero-passage p {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.3vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 1.4rem;
  font-variation-settings: "opsz" 14;
  max-width: 38rem;
}

.something-else {
  margin: 4rem 0 3rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2rem, 3.6vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--ink);
  font-variation-settings: "opsz" 36;
  max-width: 32rem;
}
.something-else .ghost {
  display: inline-block;
  position: relative;
}
.something-else .ghost::after {
  content: attr(data-ghost);
  position: absolute;
  inset: 0;
  color: var(--accent);
  opacity: 0.0;
  transform: translate(8px, -3px) skewX(-4deg);
  transition: opacity 600ms ease, transform 1200ms ease;
  pointer-events: none;
}
.something-else .ghost:hover::after {
  opacity: 0.35;
  transform: translate(0, 0) skewX(0);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--ink);
  color: var(--bg);
  padding: 1rem 1.5rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 0;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, padding 240ms ease;
}
.hero-cta:hover { padding-right: 2rem; }
.hero-cta .arrow { transition: transform 240ms ease; }
.hero-cta:hover .arrow { transform: translateX(6px); }

/* ─────────────────────────────────────────── reveal animation ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 800ms cubic-bezier(.2,.7,.2,1), transform 800ms cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
}
[data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* typewriter cursor */
.tw-line.typing::after {
  content: "";
  display: inline-block;
  width: 2px; height: 1em;
  background: currentColor;
  margin-left: 3px;
  vertical-align: -0.12em;
  animation: cursor-blink 1.05s steps(2) infinite;
  opacity: 0.7;
}
@keyframes cursor-blink {
  0%, 50% { opacity: 0.7 }
  51%, 100% { opacity: 0 }
}

/* hero variant: typewriter starts hidden, shown line-by-line */
.hero[data-hero="typewriter"] .tw-line { opacity: 0; }
.hero[data-hero="typewriter"] .tw-line.shown { opacity: 1; transition: opacity 220ms ease; }
.hero[data-hero="typewriter"] .post-passage { opacity: 0; transition: opacity 700ms ease; }
.hero[data-hero="typewriter"] .post-passage.shown { opacity: 1; }

/* hero variant: fade — paragraphs fade in on scroll */
.hero[data-hero="fade"] .tw-line {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 900ms ease-out, transform 900ms ease-out;
}
.hero[data-hero="fade"] .tw-line.is-in {
  opacity: 1;
  transform: translateY(0);
}

/* hero variant: static — all visible */
.hero[data-hero="static"] .tw-line { opacity: 1; }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero .tw-line { opacity: 1; transform: none; transition: none; }
  .tw-line.typing::after { animation: none; opacity: 0; }
}

/* ─────────────────────────────────────────── forecast diagram ── */
.tracker-section { background: var(--bg-soft); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }

.tracker-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 3rem;
}
.tracker-head h2 { font-style: italic; font-variation-settings: "opsz" 36; }

.diagram {
  position: relative;
  margin: 3.5rem 0 3rem;
  padding: 1.25rem 0 0.5rem;
}
.diagram-axis {
  position: absolute; left: 0; right: 0;
  height: 1px; background: var(--rule);
}
.diagram-axis.top { top: 0; }
.diagram-axis.bot { bottom: 0; }
.diagram-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
.day-col {
  position: relative;
  padding: 0.25rem 0.5rem 1.5rem;
  border-left: 1px solid var(--rule-soft);
  min-height: 220px;
}
.day-col:first-child { border-left: 1px solid var(--rule); }
.day-col:last-child { border-right: 1px solid var(--rule); }
.day-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 0.25rem;
}
.day-num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 2rem;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 1rem;
  font-variation-settings: "opsz" 24;
}
.day-col .forecast,
.day-col .reality {
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-3);
  margin-bottom: 0.75rem;
  font-family: var(--serif);
  font-variation-settings: "opsz" 14;
}
.day-col .forecast::before,
.day-col .reality::before {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-5);
  margin-bottom: 0.3rem;
  font-style: normal;
}
.day-col .forecast::before { content: "Forecast"; }
.day-col .reality::before  { content: "Reality";  color: var(--accent); }

/* the gap line — animated */
.gap-svg {
  position: absolute; inset: 0;
  pointer-events: none;
  width: 100%; height: 100%;
  overflow: visible;
}
.gap-svg .forecast-line,
.gap-svg .reality-line {
  fill: none;
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 1800ms ease-out;
}
.gap-svg.in .forecast-line,
.gap-svg.in .reality-line { stroke-dashoffset: 0; }
.gap-svg .forecast-line { stroke: var(--ink-3); stroke-dasharray: 4 4; }
.gap-svg .reality-line { stroke: var(--accent); transition-delay: 400ms; }
.gap-svg .gap-fill {
  fill: var(--accent);
  opacity: 0;
  transition: opacity 1200ms ease-out 1400ms;
}
.gap-svg.in .gap-fill { opacity: 0.10; }
.gap-svg .dot { fill: var(--bg-soft); stroke-width: 1.25; }

/* legend */
.legend {
  display: flex;
  gap: 2rem;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-top: 0.5rem;
}
.legend-item { display: flex; align-items: center; gap: 8px; }
.legend-swatch { width: 18px; height: 1.5px; background: var(--ink-3); }
.legend-swatch.dashed {
  background-image: linear-gradient(to right, var(--ink-3) 0 4px, transparent 4px 8px);
  background-size: 8px 1.5px; background-repeat: repeat-x; background-position: center;
  background-color: transparent; height: 1.5px;
}
.legend-swatch.solid { background: var(--accent); }
.legend-swatch.gap { width: 18px; height: 8px; background: var(--accent); opacity: 0.18; }

/* ─────────────────────────────────────────── signup form ── */
.signup {
  margin-top: 2rem;
  padding: 2rem;
  border: 1px solid var(--rule);
  background: var(--bg);
  display: grid;
  gap: 1.25rem;
}
.signup label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.signup input[type="text"],
.signup input[type="email"],
.signup textarea {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0;
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink);
  resize: none;
  font-variation-settings: "opsz" 16;
}
.signup input:focus, .signup textarea:focus { outline: 0; border-bottom-color: var(--ink); }
.signup textarea { min-height: 3.5rem; line-height: 1.4; }

.signup .row { display: grid; gap: 0.5rem; }
.signup .submit {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--ink);
  color: var(--bg);
  padding: 0.95rem 1.4rem;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 0; cursor: pointer;
  justify-self: start;
  transition: padding 240ms ease;
}
.signup .submit:hover { padding-right: 1.9rem; }
.signup .submit .arrow { transition: transform 240ms ease; }
.signup .submit:hover .arrow { transform: translateX(6px); }

.signup .fineprint {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--ink-4);
  text-transform: none;
}

/* ─────────────────────────────────────────── principles ── */
.principles { padding-top: 0; }
.principle-part {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  padding: 3rem 0;
  border-top: 1px solid var(--rule);
}
.principle-part:last-child { border-bottom: 1px solid var(--rule); }
.principle-part .part-meta { position: sticky; top: 6rem; align-self: start; }
.principle-part .part-meta .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2rem, 3.6vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.012em;
  text-transform: none;
  color: var(--ink-4);
  font-variation-settings: "opsz" 36;
  margin-bottom: 0.5rem;
}
.principle-part .part-meta h3 {
  font-style: italic;
  margin-bottom: 0.5rem;
  font-variation-settings: "opsz" 24;
}
.principle-part .part-meta .gist {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink-3);
  line-height: 1.45;
  font-variation-settings: "opsz" 12;
}

.principle-list { display: grid; gap: 0; }
.principle {
  display: grid;
  grid-template-columns: 56px 36px 1fr;
  gap: 1.25rem;
  align-items: start;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule-soft);
  transition: background 220ms ease;
}
.principle:first-child { border-top: 0; }
.principle:hover { background: rgba(0,0,0,0.015); }
.principle .pnum {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-4);
  padding-top: 0.45rem;
}
.principle .glyph {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
}
.principle .glyph svg {
  width: 32px; height: 32px;
  stroke: currentColor;
  stroke-width: 1.25;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.principle .body h4 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.25rem;
  font-variation-settings: "opsz" 18;
}
.principle .body p {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink-3);
  line-height: 1.55;
  max-width: 38rem;
  font-variation-settings: "opsz" 14;
}

@media (max-width: 760px) {
  .principle-part { grid-template-columns: 1fr; gap: 1.5rem; }
  .principle-part .part-meta { position: static; }
  .principle { grid-template-columns: 36px 36px 1fr; gap: 0.85rem; }
  .principle .pnum { padding-top: 0.5rem; }
}

/* ─────────────────────────────────────────── dialogue ── */
.dialogue { background: var(--bg-soft); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.dialogue .turn {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 1.25rem;
  padding: 1rem 0;
  align-items: baseline;
}
.dialogue .speaker {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  padding-top: 0.4rem;
}
.dialogue .turn p {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 1.6vw, 1.45rem);
  line-height: 1.5;
  color: var(--ink);
  font-variation-settings: "opsz" 18;
}
.dialogue .turn.maya .speaker { color: var(--accent); }
.dialogue .pull {
  margin: 4rem 0 0;
  padding-top: 3rem;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1.3;
  color: var(--ink);
  font-variation-settings: "opsz" 30;
  max-width: 32rem;
}
.dialogue .pull-attr {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-top: 1rem;
}

/* ─────────────────────────────────────────── about ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
}
.about-portrait {
  aspect-ratio: 3 / 4;
  background: var(--ink);
  border: 1px solid var(--rule);
  overflow: hidden;
  position: relative;
}
.about-portrait img {
  width: 100%; height: 100%; display: block; object-fit: cover;
}
.about-body p {
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 1.1rem;
  font-variation-settings: "opsz" 14;
}
.about-body .credit-line {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-style: italic;
  color: var(--ink-3);
}
@media (max-width: 760px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-portrait { max-width: 280px; }
}

/* ─────────────────────────────────────────── final cta ── */
.final-cta {
  background: var(--ink);
  color: var(--bg);
  text-align: left;
}
.final-cta h2 {
  color: var(--bg);
  font-style: italic;
  font-variation-settings: "opsz" 36;
  margin-bottom: 1.25rem;
}
.final-cta .lede {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--bg);
  opacity: 0.78;
  max-width: 32rem;
  margin-bottom: 2.5rem;
  font-variation-settings: "opsz" 16;
}
.final-cta .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  background: transparent;
  color: var(--bg);
  border: 1px solid rgba(255,255,255,0.4);
  padding: 1rem 1.5rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, padding 240ms ease, border-color 180ms ease;
}
.final-cta .cta-btn:hover {
  background: var(--bg);
  color: var(--ink);
  padding-right: 2rem;
  border-color: var(--bg);
}
.final-cta .cta-btn .arrow { transition: transform 240ms ease; }
.final-cta .cta-btn:hover .arrow { transform: translateX(6px); }

/* ─────────────────────────────────────────── footer ── */
footer {
  position: relative;
  z-index: 2;
  padding: 2.5rem var(--gutter);
  background: var(--ink);
  color: rgba(255,255,255,0.55);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  border-top: 1px solid rgba(255,255,255,0.08);
}
footer .row {
  max-width: 78rem; margin: 0 auto;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}

/* ─────────────────────────────────────────── responsive ── */
@media (max-width: 720px) {
  .diagram-grid { grid-template-columns: repeat(5, minmax(120px, 1fr)); overflow-x: auto; }
  .diagram { overflow-x: auto; }
  .nav .meta { display: none; }
}