/* The Automation Practice — site v1
   Design thesis: look expensive, read simple.
   Tokens → base → layout → components → sections → motion → responsive */

/* ─── Fonts ──────────────────────────────────────────────────────────── */
@font-face {
  font-family: 'Newsreader';
  src: url('../fonts/newsreader-latin.woff2') format('woff2-variations');
  font-weight: 300 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Newsreader';
  src: url('../fonts/newsreader-italic-latin.woff2') format('woff2-variations');
  font-weight: 300 600; font-style: italic; font-display: swap;
}
@font-face {
  font-family: 'InterVar';
  src: url('../fonts/inter-latin.woff2') format('woff2-variations');
  font-weight: 300 700; font-style: normal; font-display: swap;
}

/* ─── Tokens ─────────────────────────────────────────────────────────── */
:root {
  /* Palette: forest (default) — warm paper, deep ink, British racing green */
  --paper:      #FBFAF7;
  --paper-2:    #F4F1EA;
  --paper-3:    #EBE7DD;
  --ink:        #15191A;
  --ink-2:      #4E5654;
  --ink-3:      #7C8481;
  --accent:     #1B4D3E;
  --accent-hi:  #2E7D5B;
  --accent-ink: #FBFAF7;
  --accent-soft: rgba(27, 77, 62, .07);
  --rule:       rgba(21, 25, 26, .13);
  --rule-soft:  rgba(21, 25, 26, .07);

  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-body: 'InterVar', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, monospace;

  --step--1: clamp(.82rem, .78rem + .2vw, .9rem);
  --step-0:  clamp(1.02rem, .98rem + .22vw, 1.14rem);
  --step-1:  clamp(1.18rem, 1.1rem + .4vw, 1.4rem);
  --step-2:  clamp(1.5rem, 1.3rem + .9vw, 2rem);
  --step-3:  clamp(1.95rem, 1.6rem + 1.7vw, 2.9rem);
  --step-4:  clamp(2.5rem, 1.7rem + 3.6vw, 4.6rem);

  --gut: clamp(1.25rem, 5vw, 4rem);
  --wrap: 1180px;
  --measure: 62ch;
  --section-y: clamp(4.5rem, 9vw, 8.5rem);
  --r: 4px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* Palette variant: ink (austere monochrome — accent is the ink itself) */
:root[data-palette="ink"] {
  --accent: #15191A; --accent-hi: #3E4947; --accent-soft: rgba(21,25,26,.06);
  --paper: #FCFBF8; --paper-2: #F2F0EA;
}
/* Palette variant: slate (cool ink-blue) */
:root[data-palette="slate"] {
  --paper: #FAFAFB; --paper-2: #F0F2F5; --paper-3: #E4E8EE;
  --ink: #12171F; --ink-2: #4A5462; --ink-3: #78828F;
  --accent: #173352; --accent-hi: #2F6CA6; --accent-soft: rgba(23,51,82,.07);
  --rule: rgba(18,23,31,.13); --rule-soft: rgba(18,23,31,.07);
}

/* Dark — applied when the OS asks and the user hasn't overridden to light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0F1312; --paper-2: #161B1A; --paper-3: #1E2523;
    --ink: #ECEAE4; --ink-2: #A3ADA9; --ink-3: #79837F;
    --accent: #58BE92; --accent-hi: #7FD5AF; --accent-ink: #0B0F0E;
    --accent-soft: rgba(88,190,146,.11);
    --rule: rgba(236,234,228,.16); --rule-soft: rgba(236,234,228,.08);
  }
  :root[data-palette="slate"]:not([data-theme="light"]) {
    --paper: #0D1117; --paper-2: #141A22; --paper-3: #1C242E;
    --accent: #6BA8E0; --accent-hi: #93C2ED; --accent-ink: #0A0E13;
    --accent-soft: rgba(107,168,224,.12);
  }
  :root[data-palette="ink"]:not([data-theme="light"]) {
    --accent: #ECEAE4; --accent-hi: #FFFFFF; --accent-ink: #0F1312;
    --accent-soft: rgba(236,234,228,.09);
  }
}
/* Dark — explicit override */
:root[data-theme="dark"] {
  --paper: #0F1312; --paper-2: #161B1A; --paper-3: #1E2523;
  --ink: #ECEAE4; --ink-2: #A3ADA9; --ink-3: #79837F;
  --accent: #58BE92; --accent-hi: #7FD5AF; --accent-ink: #0B0F0E;
  --accent-soft: rgba(88,190,146,.11);
  --rule: rgba(236,234,228,.16); --rule-soft: rgba(236,234,228,.08);
}
:root[data-theme="dark"][data-palette="slate"] {
  --paper: #0D1117; --paper-2: #141A22; --paper-3: #1C242E;
  --accent: #6BA8E0; --accent-hi: #93C2ED; --accent-ink: #0A0E13;
  --accent-soft: rgba(107,168,224,.12);
}
:root[data-theme="dark"][data-palette="ink"] {
  --accent: #ECEAE4; --accent-hi: #FFFFFF; --accent-ink: #0F1312;
  --accent-soft: rgba(236,234,228,.09);
}

/* ─── Base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  font-variation-settings: 'opsz' 18;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -.017em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--step-4); font-variation-settings: 'opsz' 60; }
h2 { font-size: var(--step-3); font-variation-settings: 'opsz' 42; }
h3 { font-size: var(--step-1); font-variation-settings: 'opsz' 22; line-height: 1.2; }
p  { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }
svg { display: block; }

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

:focus-visible {
  outline: 2px solid var(--accent-hi);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--accent); color: var(--accent-ink);
  padding: .8em 1.2em; text-decoration: none;
}
.skip:focus { left: var(--gut); top: .5rem; }

/* ─── Layout ─────────────────────────────────────────────────────────── */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gut); }
.section { padding-block: var(--section-y); position: relative; }
.section--alt { background: var(--paper-2); }
.section--rule { border-top: 1px solid var(--rule-soft); }
.prose { max-width: var(--measure); }
.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
p { text-wrap: pretty; }   /* no orphaned last words */

/* Eyebrow: mono index + label. The "practice" documentary tic. */
.eyebrow {
  display: flex; align-items: baseline; gap: .75em;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 1.6rem;
}
.eyebrow::before {
  content: ""; width: 1.8em; height: 1px; background: var(--rule);
  transform: translateY(-.3em);
}
.eyebrow b { font-weight: 500; color: var(--accent-hi); }

.section-head { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-head h2 { max-width: 20ch; }
.section-head .lede { margin-top: 1.25rem; max-width: 56ch; }

/* ─── Buttons ────────────────────────────────────────────────────────── */
.btn {
  --btn-bg: var(--accent); --btn-fg: var(--accent-ink); --btn-bd: var(--accent);
  display: inline-flex; align-items: center; gap: .6em;
  padding: .92em 1.6em;
  font: inherit; font-size: var(--step-0); font-weight: 500;
  letter-spacing: -.005em;
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1px solid var(--btn-bd); border-radius: var(--r);
  text-decoration: none; cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.btn:hover { --btn-bg: var(--accent-hi); --btn-bd: var(--accent-hi); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn .arr { transition: transform .22s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }

.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); --btn-bd: var(--rule); }
.btn--ghost:hover { --btn-bg: transparent; --btn-fg: var(--ink); --btn-bd: var(--ink-3); }
.btn--sm { padding: .62em 1.15em; font-size: var(--step--1); }

.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }

.tel {
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: .01em; text-decoration: none; color: var(--ink-2);
  padding: .92em 0; white-space: nowrap;
  transition: color .18s var(--ease);
}
.tel:hover { color: var(--accent-hi); }

/* Underlined inline link */
.link {
  color: inherit; text-decoration: none;
  background-image: linear-gradient(var(--accent-hi), var(--accent-hi));
  background-size: 100% 1px; background-repeat: no-repeat; background-position: 0 100%;
  padding-bottom: 1px;
  transition: background-size .22s var(--ease), color .18s var(--ease);
}
.link:hover { color: var(--accent-hi); background-size: 100% 2px; }

/* ─── Header ─────────────────────────────────────────────────────────── */
.hdr {
  position: sticky; top: 0; z-index: 100;
  padding-top: env(safe-area-inset-top, 0px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.5) blur(14px);
  -webkit-backdrop-filter: saturate(1.5) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.hdr[data-stuck="1"] { border-bottom-color: var(--rule-soft); }
.hdr__in {
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 68px;
}
.brand {
  display: flex; align-items: center; gap: .6rem;
  text-decoration: none; margin-right: auto;
  font-family: var(--font-display); font-size: 1.16rem;
  font-variation-settings: 'opsz' 20; letter-spacing: -.012em;
  line-height: 1.1;
}
.brand .mark { flex: none; color: var(--accent-hi); }
.brand span { white-space: nowrap; }
.brand .thin { color: var(--ink-2); }

.nav { display: flex; align-items: center; gap: clamp(1rem, 2.2vw, 2rem); }
.nav a {
  text-decoration: none; font-size: var(--step--1); color: var(--ink-2);
  letter-spacing: -.003em; position: relative; padding-block: .4em;
  transition: color .18s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .1em; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform .24s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { transform: scaleX(1); }
@media (max-width: 860px) { .nav { display: none; } }
/* The header CTA stays on phones — it's the only always-reachable way to book. */
@media (max-width: 520px) {
  .brand { font-size: 1rem; gap: .45rem; }
  .brand .mark { width: 19px; height: 19px; }
  .hdr .btn { padding: .58em .9em; font-size: .82rem; }
  .hdr__in { gap: .75rem; min-height: 60px; }
}

/* ─── Hero ───────────────────────────────────────────────────────────── */
.hero { padding-block: clamp(3rem, 6vw, 5.25rem) clamp(3.5rem, 7vw, 6rem); position: relative; }
.hero__in { display: grid; gap: clamp(2.5rem, 5vw, 4.5rem); align-items: center; }

/* Hero variant A (default): split — copy left, diagram right */
body[data-hero="a"] .hero__in { grid-template-columns: minmax(0, .93fr) minmax(0, 1.07fr); }
@media (max-width: 940px) { body[data-hero="a"] .hero__in { grid-template-columns: 1fr; } }

/* Hero variant B: centred, big type, diagram beneath full width */
body[data-hero="b"] .hero__in { grid-template-columns: 1fr; justify-items: center; text-align: center; }
body[data-hero="b"] .hero__copy { max-width: 900px; width: 100%; }
body[data-hero="b"] h1 { font-size: clamp(2.7rem, 6.6vw, 5.4rem); max-width: 16ch; margin-inline: auto; }
body[data-hero="b"] .hero__sub { max-width: 52ch; margin-inline: auto; }
body[data-hero="b"] .cta-row { justify-content: center; }
body[data-hero="b"] .hero__note { justify-content: center; }
/* Full-width variants: cap the figure so the SVG doesn't scale its labels up. */
body[data-hero="b"] .hero__art,
body[data-hero="c"] .hero__art { width: 100%; max-width: 780px; margin-inline: auto; }

/* Hero variant C: editorial — statement left, supporting column right, diagram below */
body[data-hero="c"] .hero__in { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); align-items: end; }
body[data-hero="c"] .hero__art { grid-column: 1 / -1; }
body[data-hero="c"] h1 { font-size: clamp(2.6rem, 6.6vw, 5.4rem); }
body[data-hero="c"] .hero__copy > .cta-row { display: none; }
body[data-hero="c"] .hero__aside { display: block; }
@media (max-width: 940px) { body[data-hero="c"] .hero__in { grid-template-columns: 1fr; } }

.hero__aside { display: none; }
.hero__aside .hero__sub { margin-bottom: 1.75rem; }

.hero__eyebrow {
  display: inline-flex; align-items: flex-start; gap: .6em;
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2);
  border: 1px solid var(--rule); border-radius: 100px;
  padding: .42em 1em .42em .75em; margin-bottom: 1.6rem;
  background: color-mix(in srgb, var(--paper-2) 60%, transparent);
}
.dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-hi); flex: none;
  margin-top: .46em;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-hi) 60%, transparent);
  animation: pulse 2.8s var(--ease) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-hi) 55%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

h1 .u {
  background-image: linear-gradient(var(--accent-hi), var(--accent-hi));
  background-size: 100% 2px; background-repeat: no-repeat; background-position: 0 96%;
  padding-bottom: .04em;
}
.hero__sub {
  font-size: var(--step-1); line-height: 1.5; color: var(--ink-2);
  max-width: 46ch; margin: 1.6rem 0 2.2rem;
}
.hero__note {
  display: flex; align-items: flex-start; gap: .6em;
  margin-top: 1.5rem; font-size: var(--step--1); color: var(--ink-3);
}
.hero__note svg { flex: none; color: var(--accent-hi); margin-top: .22em; }

.hero__art {
  border: 1px solid var(--rule); border-radius: var(--r);
  background: var(--paper-2);
  padding: clamp(1rem, 2.2vw, 1.5rem);
  overflow: hidden;
}

/* ─── Marquee / credibility strip ────────────────────────────────────── */
.strip {
  border-block: 1px solid var(--rule-soft);
  padding-block: 1.4rem;
  background: var(--paper);
}
.strip__in {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: .85rem clamp(.9rem, 2.4vw, 2rem);
  font-size: var(--step--1); color: var(--ink-3);
}
.strip__in > span { display: inline-flex; align-items: center; gap: .55em; white-space: nowrap; }
.strip__in svg { color: var(--accent-hi); flex: none; }
.strip__lbl {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .1em;
  color: var(--ink-3); margin-right: auto;
}

/* ─── Cards / grids ──────────────────────────────────────────────────── */
.grid { display: grid; gap: 1px; background: var(--rule-soft); border: 1px solid var(--rule-soft); border-radius: var(--r); overflow: hidden; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 880px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } }

.cell {
  background: var(--paper);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  display: flex; flex-direction: column; gap: .85rem;
  transition: background .25s var(--ease);
}
.section--alt .cell { background: var(--paper-2); }
.cell:hover { background: color-mix(in srgb, var(--accent) 3.5%, var(--paper)); }
.section--alt .cell:hover { background: color-mix(in srgb, var(--accent) 4%, var(--paper-2)); }
.cell__n {
  font-family: var(--font-mono); font-size: var(--step--1); color: var(--accent-hi);
  letter-spacing: .09em; text-transform: uppercase;
}
.cell p { color: var(--ink-2); font-size: var(--step-0); }
.cell ul { margin: .25rem 0 0; padding-left: 1.1em; color: var(--ink-2); font-size: var(--step--1); }
.cell li { margin-bottom: .4em; }
.cell li::marker { color: var(--accent-hi); }
.cell .tag {
  margin-top: auto; padding-top: .9rem;
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3);
}

/* ─── Audit node + fan connector (section 02) ────────────────────────── */
.fanwrap { display: block; }
.auditnode {
  border: 1.2px solid var(--accent-hi); border-radius: var(--r);
  background: var(--accent-soft);
  padding: 1.05rem 2rem 1.25rem; text-align: center;
  max-width: 340px; margin-inline: auto;
}
.auditnode .k {
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .1em; color: var(--accent-hi);
  display: block; margin-bottom: .35rem;
}
.auditnode h3 { font-size: var(--step-2); }
.auditnode p { font-size: var(--step--1); color: var(--ink-2); margin: .4rem 0 0; }
.fan { display: block; width: 100%; height: 76px; }
.fan svg { display: block; width: 100%; height: 76px; }
@media (max-width: 880px) { .fan { height: 44px; } .fan svg { height: 44px; } }

/* Sector grid */
.sectors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule-soft); border: 1px solid var(--rule-soft); border-radius: var(--r); overflow: hidden; }
@media (max-width: 900px) { .sectors { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .sectors { grid-template-columns: 1fr; } }
.sector {
  background: var(--paper); padding: clamp(1.25rem, 2.4vw, 1.75rem);
  display: flex; flex-direction: column; gap: .5rem;
  transition: background .25s var(--ease);
}
.section--alt .sector { background: var(--paper-2); }
.sector:hover { background: color-mix(in srgb, var(--accent) 4%, var(--paper)); }
.section--alt .sector:hover { background: color-mix(in srgb, var(--accent) 5%, var(--paper-2)); }
.sector h3 { font-size: var(--step-0); font-family: var(--font-body); font-weight: 600; letter-spacing: -.008em; }
.sector p { font-size: var(--step--1); color: var(--ink-2); line-height: 1.5; }
.sector .fix {
  margin-top: auto; padding-top: .75rem; font-size: var(--step--1);
  color: var(--accent-hi); display: flex; gap: .5em; align-items: flex-start;
}
.sector .fix svg { flex: none; margin-top: .35em; }

/* ─── Story cards ────────────────────────────────────────────────────── */
.stories { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1rem, 2vw, 1.5rem); }
@media (max-width: 880px) { .stories { grid-template-columns: 1fr; } }
.story {
  border: 1px solid var(--rule-soft); border-radius: var(--r);
  background: var(--paper); padding: clamp(1.5rem, 3vw, 2.25rem);
  display: flex; flex-direction: column; gap: 1.1rem;
}
.section--alt .story { background: var(--paper-2); }
.story__stat {
  font-family: var(--font-display); font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-variation-settings: 'opsz' 48; line-height: 1; color: var(--accent-hi);
  letter-spacing: -.03em;
}
.story__stat small { font-size: .34em; line-height: 1.4; letter-spacing: -.005em; color: var(--ink-2); display: block; margin-top: .5em; font-family: var(--font-body); }
.story__stat { margin-bottom: -.2rem; }
.story h3 { font-size: var(--step-1); }
.story p { color: var(--ink-2); }
.story__who {
  margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--rule-soft);
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3);
}

/* ─── Before / after control ─────────────────────────────────────────── */
.switch {
  display: inline-flex; padding: 3px; gap: 2px;
  border: 1px solid var(--rule); border-radius: 100px;
  background: color-mix(in srgb, var(--paper-2) 80%, transparent);
}
.switch button {
  font: inherit; font-size: var(--step--1); font-weight: 500;
  padding: .5em 1.25em; border: 0; border-radius: 100px;
  background: transparent; color: var(--ink-2); cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease);
}
.switch button[aria-selected="true"] { background: var(--accent); color: var(--accent-ink); }

.figure {
  border: 1px solid var(--rule-soft); border-radius: var(--r);
  background: var(--paper); overflow: hidden;
}
.section--alt .figure { background: var(--paper-2); }
.figure__bar {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 1rem clamp(1rem, 2.5vw, 1.75rem);
  border-bottom: 1px solid var(--rule-soft);
}
.figure__ttl {
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3);
  margin-right: auto;
}
.figure__body { padding: clamp(1.25rem, 3vw, 2rem); }
.figure__cap {
  padding: 1rem clamp(1rem, 2.5vw, 1.75rem);
  border-top: 1px solid var(--rule-soft);
  font-size: var(--step--1); color: var(--ink-3);
}

/* ─── Timeline ─────────────────────────────────────────────────────────
   The rail is part of the step cards, not a separate diagram — one object,
   no duplicated labels. */
.steps {
  --sgap: clamp(1rem, 2.5vw, 2rem);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sgap);
}
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

.step { display: flex; flex-direction: column; gap: .7rem; position: relative; padding-top: 2.1rem; }
/* node */
.step::after {
  content: ""; position: absolute; top: 0; left: 0;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent-hi); box-sizing: border-box;
}
.step:last-child::after { background: var(--paper); border: 1.5px dashed var(--ink-3); }
.section--alt .step:last-child::after { background: var(--paper-2); }
/* rail segment reaching to the next node */
.step::before {
  content: ""; position: absolute; top: 6px; left: 13px;
  width: calc(100% - 13px + var(--sgap)); height: 1px;
  background: var(--accent-hi); opacity: .55;
  transform: scaleX(var(--rail, 1)); transform-origin: left;
  transition: transform .8s var(--ease);
}
.js .steps:not(.in) .step::before { --rail: 0; }
.step:nth-child(3)::before { background: none; border-top: 1px dashed var(--ink-3); opacity: .8; height: 0; }
.step:last-child::before { display: none; }
@media (max-width: 900px) { .step::before { display: none; } }
.step__n {
  font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .1em;
  color: var(--accent-hi);
}
.step h3 { font-size: var(--step-1); }
.step p { font-size: var(--step--1); color: var(--ink-2); line-height: 1.55; }
.step__meta {
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3);
}

/* ─── Quote / founder ────────────────────────────────────────────────── */
.founder { display: grid; grid-template-columns: minmax(0, 210px) minmax(0, 1fr); gap: clamp(1.75rem, 4vw, 3.5rem); align-items: start; }
@media (max-width: 720px) { .founder { grid-template-columns: 1fr; } }
.portrait {
  aspect-ratio: 4 / 5; border-radius: var(--r);
  border: 1px solid var(--rule-soft);
  background: var(--paper-3);
  display: grid; place-items: center; overflow: hidden;
  position: relative;
}
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.portrait .mono {
  font-family: var(--font-display); font-size: 3rem; color: var(--ink-3);
  font-variation-settings: 'opsz' 48; letter-spacing: -.02em;
}
.portrait .ph {
  position: absolute; bottom: .6rem; left: 0; right: 0; text-align: center;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-3); opacity: .75;
}
.founder blockquote {
  margin: 0; font-family: var(--font-display); font-style: italic;
  font-size: var(--step-2); line-height: 1.32; font-variation-settings: 'opsz' 34;
  letter-spacing: -.012em; max-width: 30ch;
}
.founder .sig { margin-top: 1.5rem; font-size: var(--step--1); color: var(--ink-3); line-height: 1.5; }
.founder .sig b { color: var(--ink); font-weight: 600; display: block; font-size: var(--step-0); }

/* ─── Safety / FAQ ───────────────────────────────────────────────────── */
.faq { border-top: 1px solid var(--rule-soft); }
.faq details { border-bottom: 1px solid var(--rule-soft); }
.faq summary {
  list-style: none; cursor: pointer; padding: 1.15rem 2.5rem 1.15rem 0;
  font-size: var(--step-1); font-family: var(--font-display);
  font-variation-settings: 'opsz' 22; letter-spacing: -.01em;
  position: relative; transition: color .18s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent-hi); }
.faq summary::after {
  content: ""; position: absolute; right: .3rem; top: 50%; width: 11px; height: 11px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: translateY(-65%) rotate(45deg);
  transition: transform .25s var(--ease); color: var(--ink-3);
}
.faq details[open] summary::after { transform: translateY(-25%) rotate(225deg); }
.faq .ans { padding: 0 3rem 1.5rem 0; color: var(--ink-2); max-width: 66ch; }
.faq .ans p { font-size: var(--step-0); }

/* ─── Final CTA ──────────────────────────────────────────────────────── */
.book { position: relative; overflow: hidden; }
.book__in { position: relative; z-index: 1; text-align: center; display: grid; justify-items: center; gap: 1.5rem; }
.book h2 { max-width: 16ch; font-size: var(--step-4); }
.book .lede { max-width: 48ch; }
.book__ways {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem 2rem;
  margin-top: 1rem; padding-top: 2rem; border-top: 1px solid var(--rule-soft);
  width: 100%; max-width: 720px;
}
@media (max-width: 680px) { .book__ways { grid-template-columns: 1fr; } }
.way { display: flex; flex-direction: column; gap: .2rem; align-items: center; }
.way .k {
  font-family: var(--font-mono); font-size: var(--step--1);
  text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3);
}
.way a { text-decoration: none; font-size: var(--step-0); }
.way a:hover { color: var(--accent-hi); }

/* ─── Footer ─────────────────────────────────────────────────────────── */
.ftr { border-top: 1px solid var(--rule-soft); padding-block: 2.5rem; font-size: var(--step--1); color: var(--ink-3); }
.ftr__in { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; }
.ftr__in a { text-decoration: none; }
.ftr__in a:hover { color: var(--ink); }
.ftr .sp { margin-left: auto; }
@media (max-width: 620px) { .ftr .sp { margin-left: 0; } }

/* ─── Diagram primitives (shared by js/diagrams.js) ──────────────────── */
.dg { width: 100%; height: auto; overflow: visible; }
.dg text { font-family: var(--font-body); fill: var(--ink); font-size: 13px; }
.dg .lbl { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase; fill: var(--ink-3); }
.dg .ttl { font-family: var(--font-display); font-size: 17.5px; fill: var(--ink); font-variation-settings: 'opsz' 22; }
.dg .ln { stroke: var(--rule); stroke-width: 1; fill: none; }
.dg .ln-a { stroke: var(--accent-hi); stroke-width: 1.4; fill: none; }
.dg .bx { fill: var(--paper); stroke: var(--rule); stroke-width: 1; }
.dg .bx-a { fill: var(--accent-soft); stroke: var(--accent-hi); stroke-width: 1.2; }
.dg .fill-a { fill: var(--accent-hi); }
.dg .fill-ink { fill: var(--ink); }
.dg .dim { opacity: .38; }

/* ─── Reveal on scroll ─────────────────────────────────────────────────
   Content is visible by default. Only once JS is running (html.js) do we
   hide it to animate it in — so a JS failure degrades to a plain page,
   never a blank one. */
.rv { opacity: 1; transform: none; }
.js .rv { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }
.rv-d1 { transition-delay: .07s; } .rv-d2 { transition-delay: .14s; }
.rv-d3 { transition-delay: .21s; } .rv-d4 { transition-delay: .28s; }

@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  .dot { animation: none; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ─── Variant panel (dev only — press V) ─────────────────────────────── */
.panel {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 300;
  background: var(--paper); border: 1px solid var(--rule);
  border-radius: 8px; padding: 1rem; width: 232px;
  box-shadow: 0 12px 40px rgba(0,0,0,.14);
  font-size: .78rem; line-height: 1.4;
}
.panel h4 { margin: 0 0 .75rem; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }
.panel .row { margin-bottom: .75rem; }
.panel .row > span { display: block; color: var(--ink-3); margin-bottom: .3rem; font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; font-family: var(--font-mono); }
.panel .opts { display: flex; gap: 3px; flex-wrap: wrap; }
.panel .opts button {
  flex: 1 1 auto; font: inherit; font-size: .72rem; padding: .35em .5em; cursor: pointer;
  border: 1px solid var(--rule); background: transparent; color: var(--ink-2); border-radius: 3px;
  transition: all .15s var(--ease);
}
.panel .opts button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.panel .hint { color: var(--ink-3); font-size: .68rem; margin: .5rem 0 0; }
.panel .cls { position: absolute; top: .4rem; right: .5rem; border: 0; background: none; color: var(--ink-3); cursor: pointer; font-size: 1rem; line-height: 1; padding: .2rem; }