/* ============================================================
   ShipWithAI — design system (v3, "quiet precision")
   Editorial, left-aligned, one disciplined accent, hairline
   craft, generous air. Restraint over noise.
   ============================================================ */

:root {
  /* --- palette: warm-neutral near-black, no pure black/white --- */
  --bg:        #0b0b0c;
  --bg-2:      #0f0f11;   /* alt band */
  --surface:   #141416;   /* cards */
  --surface-2: #1a1a1d;   /* raised / hover */
  --hairline:  #ffffff12; /* borders as translucent white */
  --hairline-2:#ffffff1f;

  --text:      #f2f2f0;   /* warm off-white */
  --text-dim:  #a6a6a2;
  --text-mute: #6f6f6b;

  --accent:      #f0562a; /* Ship With AI ember */
  --accent-2:    #ff7d4d;
  --accent-soft: #f0562a14;
  --accent-line: #f0562a33;
  --accent-ink:  #14060266; /* dark ink for tints */
  --live:        #4bd493;

  /* --- type --- */
  --font-sans:    'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-serif:   'Literata', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif; /* book covers only */

  --step--1: clamp(.8rem, .78rem + .08vw, .86rem);
  --step-0:  clamp(.94rem, .9rem + .2vw, 1.02rem);
  --step-1:  clamp(1.08rem, 1rem + .35vw, 1.25rem);
  --step-2:  clamp(1.35rem, 1.15rem + .8vw, 1.75rem);
  --step-3:  clamp(1.8rem, 1.4rem + 1.6vw, 2.65rem);
  --step-4:  clamp(2.5rem, 1.7rem + 3.4vw, 4.4rem);

  /* --- spacing (8px base) --- */
  --sp-1: .5rem;  --sp-2: 1rem;   --sp-3: 1.5rem;
  --sp-4: 2rem;   --sp-5: 3rem;   --sp-6: 4.5rem;
  --sp-7: 7rem;   --sp-8: 10rem;

  --maxw: 1120px;
  --gutter: clamp(1.25rem, 5vw, 3.5rem);
  --radius: 12px;
  --radius-sm: 8px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
}
body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--text-dim);
  background: transparent;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv05" 1, "ss01" 1;
  overflow-x: hidden;
}

/* ---------- ambient: fixed background + scrim + grain ---------- */
:root { --page-image: url("assets/bg-aurora.jpg") center / cover no-repeat; }
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background: var(--page-image), linear-gradient(180deg, #0b0b0c 0%, #090a0d 100%);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E"),
    linear-gradient(180deg, rgba(9,9,11,.5) 0%, rgba(9,9,11,.68) 55%, rgba(9,9,11,.78) 100%);
  background-size: 160px 160px, auto;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.08;
  font-weight: 500;
  letter-spacing: -.025em;
  color: var(--text);
}
b, strong { font-weight: 600; color: var(--text); }
em { font-style: normal; }

::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: .6rem 1rem; border-radius: 0 0 8px 0;
  font-size: var(--step--1);
}
.skip-link:focus { left: 0; }

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

/* ---------- shared label primitive (mono, demoted to labels only) ---------- */
.eyebrow, .kicker, .badge, .tag, .metadata-row,
.founder-stats span, .site-footer__links a {
  font-family: var(--font-mono);
}
.eyebrow, .kicker {
  display: inline-flex; align-items: center; gap: .6rem;
  font-size: var(--step--1);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 500;
}
.kicker__num { color: var(--accent); }
.kicker::before, .eyebrow::before {
  content: ""; width: 1.75rem; height: 1px; background: var(--hairline-2);
}

/* metadata row — dot-separated mono */
.metadata-row {
  display: flex; flex-wrap: wrap; gap: .35rem 0;
  font-size: var(--step--1); color: var(--text-mute); letter-spacing: .02em;
}
.metadata-row span { display: inline-flex; align-items: center; }
.metadata-row span:not(:last-child)::after {
  content: "/"; margin: 0 .9rem; color: var(--hairline-2);
}
.metadata-row--chips span { color: var(--text-dim); }
.metadata-row--chips span:not(:last-child)::after { content: "·"; }

/* ---------- layout ---------- */
.section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: var(--sp-7) var(--gutter);
  border-top: 1px solid var(--hairline);
}
.section__head { max-width: 44rem; margin-bottom: var(--sp-6); }
.section__title { font-size: var(--step-3); margin-top: var(--sp-2); }
.section__lede {
  margin-top: var(--sp-3); font-size: var(--step-1);
  color: var(--text-dim); max-width: 42rem;
}

/* ---------- nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  transition: border-color .3s var(--ease), background .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  border-bottom-color: var(--hairline);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
}
.nav {
  max-width: var(--maxw); margin-inline: auto;
  padding: 1rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3);
}
.nav__brand { display: inline-flex; align-items: center; gap: .6rem; }
.nav__word {
  font-family: var(--font-display); font-weight: 600; font-size: 1.1rem;
  letter-spacing: -.02em; color: var(--text);
}
.nav__word-tail { color: var(--text-dim); }
.nav__word em { color: var(--accent); }
.nav__menu { display: flex; align-items: center; gap: .3rem; }
.nav__menu a {
  padding: .5rem .7rem; border-radius: 7px;
  font-size: var(--step--1); color: var(--text-mute);
  transition: color .2s var(--ease);
}
.nav__menu a:hover { color: var(--text); }
.nav__menu a.is-active { color: var(--text); }
.nav__cta {
  color: var(--text) !important;
  border: 1px solid var(--hairline-2);
  border-radius: 8px; padding: .5rem .9rem !important;
}
.nav__cta:hover { border-color: var(--accent); color: var(--accent) !important; }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: .4rem;
}
.nav__toggle-bar { width: 20px; height: 1.5px; background: var(--text); transition: transform .3s var(--ease), opacity .2s var(--ease); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- buttons (sans, restrained) ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-sans); font-size: var(--step-0); font-weight: 500;
  padding: .8rem 1.35rem; border-radius: 9px;
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-2); transform: translateY(-1px); }
.btn--ghost { border-color: var(--hairline-2); color: var(--text); }
.btn--ghost:hover { border-color: var(--text-dim); background: var(--surface); }
.btn--sm { padding: .6rem 1rem; font-size: var(--step--1); }
.btn--lg { padding: .95rem 1.75rem; font-size: var(--step-1); }

/* ---------- hero (left-aligned, editorial) ---------- */
.hero {
  position: relative;
  padding: clamp(4rem, 12vh, 8rem) 0 var(--sp-7);
  background:
    linear-gradient(90deg, rgba(10,10,12,.94) 0%, rgba(10,10,12,.72) 40%, rgba(10,10,12,.30) 74%, rgba(10,10,12,.5) 100%),
    linear-gradient(180deg, rgba(10,10,12,.30) 0%, rgba(10,10,12,0) 26%, rgba(10,10,12,.5) 80%, var(--bg) 99%),
    var(--page-image);
}
.hero__graph { display: none; }
.hero__inner { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.hero .eyebrow { margin-bottom: var(--sp-3); }
.hero__title {
  font-size: var(--step-4);
  font-weight: 500;
  letter-spacing: -.03em;
  line-height: 1.02;
  color: var(--text);
  max-width: 18ch;
}
.hero__title .accent { color: var(--accent); }
.hero__sub {
  margin-top: var(--sp-3);
  color: var(--text-dim); font-size: var(--step-1); max-width: 44rem;
}
.thesis {
  margin-top: var(--sp-4);
  padding-left: var(--sp-3);
  border-left: 2px solid var(--accent);
  font-family: var(--font-display);
  font-size: var(--step-1); color: var(--text); font-weight: 400;
  max-width: 40rem;
}
.thesis__mark { display: none; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin: var(--sp-5) 0; }
.hero .metadata-row { padding-top: var(--sp-3); border-top: 1px solid var(--hairline); }

/* ---------- operating model: roadmap ---------- */
.steps {
  position: relative;
  display: flex; gap: var(--sp-2);
  padding-top: var(--sp-2);
}
.steps::before {
  content: ""; position: absolute; top: calc(var(--sp-2) + 1.375rem);
  left: 12.5%; right: 12.5%; height: 2px; transform: translateY(-1px);
  background: linear-gradient(90deg, var(--accent), var(--accent-line));
}
.step {
  flex: 1 1 0; position: relative;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: .5rem; padding: 0 var(--sp-2);
}
.step__num {
  position: relative; z-index: 1;
  width: 2.75rem; height: 2.75rem; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: var(--step-0);
  color: var(--accent); background: var(--surface);
  border: 1px solid var(--accent-line);
  margin-bottom: var(--sp-2);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.step:hover .step__num { border-color: var(--accent); background: var(--surface-2); }
.step__title { font-size: var(--step-1); color: var(--text); }
.step p { color: var(--text-dim); font-size: var(--step-0); }
.payoff {
  margin-top: var(--sp-4); font-family: var(--font-display);
  font-size: var(--step-2); color: var(--text); font-weight: 400; letter-spacing: -.02em;
}

/* ---------- services (two-column list: offer | promise + points) ---------- */
.services { border-top: 1px solid var(--hairline); }
.svc {
  display: grid; grid-template-columns: minmax(15rem, 1fr) 2fr;
  gap: var(--sp-3) var(--sp-6); align-items: start;
  padding: var(--sp-5) 0; border-bottom: 1px solid var(--hairline);
}
.svc__name { font-size: var(--step-2); color: var(--text); }
.svc__who { margin-top: var(--sp-2); color: var(--text-mute); font-family: var(--font-mono); font-size: var(--step--1); max-width: 22rem; }
.svc__promise { color: var(--text); font-size: var(--step-1); max-width: 40rem; }
.svc__points { margin-top: var(--sp-3); display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }
.svc__points li { position: relative; padding-left: 1.1rem; color: var(--text-dim); font-size: var(--step-0); }
.svc__points li::before {
  content: ""; position: absolute; left: 0; top: .65em;
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
}
.tag {
  color: var(--accent); text-transform: uppercase; letter-spacing: .1em;
  font-size: .72em; margin-right: .5rem;
}

/* chip primitive */
.chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.chip {
  font-family: var(--font-mono); font-size: var(--step--1);
  padding: .3rem .6rem; border: 1px solid var(--hairline); border-radius: 6px;
  color: var(--text-dim); background: var(--surface);
}
.chip b { color: var(--accent); margin-left: .35rem; font-weight: 500; }
.chips--sm .chip { padding: .22rem .5rem; }

/* ---------- products ---------- */
.product-feature {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: var(--sp-5); align-items: center;
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--bg-2) 100%);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: var(--sp-5);
  margin-bottom: var(--sp-3);
}
.product-feature__top { display: flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-2); }
.product-feature__name { font-size: var(--step-3); color: var(--text); }
.product-feature__tag { color: var(--accent); font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .04em; margin-bottom: var(--sp-2); }
.product-feature__desc { color: var(--text-dim); font-size: var(--step-1); margin-bottom: var(--sp-3); max-width: 44ch; }
.product-feature .metadata-row { margin-bottom: var(--sp-3); }
.product-feature .chips { margin-bottom: var(--sp-4); }
.product-feature__art { display: grid; align-items: center; }
.shot {
  border-radius: 10px; overflow: hidden; background: var(--bg);
  border: 1px solid var(--hairline-2);
  box-shadow: 0 30px 60px -32px rgba(0, 0, 0, .9);
}
.shot__bar {
  display: flex; align-items: center; gap: .3rem; padding: .5rem .7rem;
  background: var(--surface-2); border-bottom: 1px solid var(--hairline);
}
.shot__bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--hairline-2); display: block; }
.shot__url { margin-left: .5rem; font-family: var(--font-mono); font-size: .7rem; color: var(--text-mute); letter-spacing: .02em; }
.shot img { width: 100%; height: auto; }

.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }
.card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.card:hover { border-color: var(--hairline-2); background: var(--surface-2); }
.card__art {
  aspect-ratio: 16 / 9; overflow: hidden;
  display: grid; place-items: center;
  border-bottom: 1px solid var(--hairline);
  background: radial-gradient(24rem 12rem at 50% 120%, var(--accent-soft), transparent 70%);
  color: var(--text-mute);
}
.card__art img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform .6s var(--ease); }
.card:hover .card__art img { transform: scale(1.03); }
.card__art svg { width: 70%; height: 60%; color: inherit; }
.card__body { padding: var(--sp-3); display: flex; flex-direction: column; gap: .7rem; flex: 1; }
.card__top { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); }
.card__name { font-size: var(--step-2); color: var(--text); }
.card__tag { color: var(--text); font-family: var(--font-mono); font-size: var(--step--1); }
.card__desc { color: var(--text-dim); font-size: var(--step-0); }
.card__link {
  margin-top: auto; padding-top: .3rem;
  font-family: var(--font-mono); font-size: var(--step--1);
  color: var(--text-mute); transition: color .2s var(--ease);
}
.card__link:hover { color: var(--accent); }

/* status badges — single restrained treatment */
.badge {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: var(--step--1); padding: .2rem .55rem; border-radius: 999px;
  border: 1px solid var(--hairline-2); color: var(--text-dim);
  letter-spacing: .04em;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge--live { color: var(--live); border-color: color-mix(in srgb, var(--live) 30%, transparent); }
.badge--live::before { box-shadow: 0 0 0 3px color-mix(in srgb, var(--live) 22%, transparent); }
.badge--oss { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.badge--oss::before { background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }

/* ---------- writing ---------- */
.writing { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--sp-5); align-items: start; }
.writing__meta { display: flex; flex-direction: column; gap: var(--sp-3); }
.series { display: grid; gap: var(--sp-3); }
.series__item { border-left: 2px solid var(--accent-line); padding-left: var(--sp-2); }
.series__name { font-size: var(--step-1); color: var(--text); }
.series__item p { color: var(--text-dim); font-size: var(--step-0); }
.promises { border: 1px solid var(--hairline); border-radius: var(--radius); overflow: hidden; }
.promises__head {
  padding: var(--sp-2) var(--sp-4); border-bottom: 1px solid var(--hairline);
  font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute);
}
.promise {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--hairline);
  transition: background .2s var(--ease);
}
.promise:last-child { border-bottom: 0; }
.promise:hover { background: var(--surface); }
.promise h3 { font-size: var(--step-1); color: var(--text); font-weight: 500; }

/* ---------- facts grid (method pillars, books page) ---------- */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.fact { border-top: 1px solid var(--hairline-2); padding-top: var(--sp-2); }
.fact__k { display: block; font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute); margin-bottom: .6rem; }
.fact__v { font-family: var(--font-display); font-size: var(--step-1); color: var(--text); font-weight: 500; letter-spacing: -.01em; line-height: 1.25; }
.fact p { margin-top: .5rem; color: var(--text-dim); }
.panino { margin-top: var(--sp-6); padding: var(--sp-4); border: 1px dashed var(--hairline-2); border-radius: var(--radius); }
.panino__label { display: block; font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute); margin-bottom: var(--sp-2); }
.panino__seq { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; font-family: var(--font-mono); }
.panino__seq span { color: var(--text-dim); font-size: var(--step-0); }
.panino__seq span:not(:last-child)::after { content: "→"; margin-left: 1rem; color: var(--accent); }

/* ---------- founders ---------- */
.founders { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-3); margin-bottom: var(--sp-5); }
.founder {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3); border: 1px solid var(--hairline); border-radius: var(--radius);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.founder:hover { border-color: var(--hairline-2); background: var(--surface); }
.founder__photo {
  width: 4.5rem; height: 4.5rem; flex: none; border-radius: 12px;
  object-fit: cover; border: 1px solid var(--hairline-2); background: var(--surface-2);
}
.founder__body { min-width: 0; }
.founder__links { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .7rem; }
.founder__links a {
  font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-mute);
  padding: .2rem .55rem; border: 1px solid var(--hairline); border-radius: 6px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.founder__links a:hover { color: var(--text); border-color: var(--hairline-2); }
.founder__name { font-size: var(--step-1); color: var(--text); }
.founder__role { color: var(--text-mute); font-family: var(--font-mono); font-size: var(--step--1); }
.founder-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.founder-stats li { border-top: 1px solid var(--hairline-2); padding-top: var(--sp-2); }
.founder-stats b { display: block; font-family: var(--font-display); font-size: var(--step-3); color: var(--text); font-weight: 500; letter-spacing: -.03em; }
.founder-stats span { color: var(--text-mute); font-size: var(--step--1); }
.founder-close { margin-top: var(--sp-4); font-family: var(--font-display); font-size: var(--step-2); color: var(--text); font-weight: 400; letter-spacing: -.02em; }

/* ---------- contact ---------- */
.section--contact { text-align: left; }
.contact { max-width: 46rem; display: flex; flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
.contact__title { font-size: var(--step-3); color: var(--text); }
.contact__links { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-2); }
.contact__links a {
  font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-mute);
  border-bottom: 1px solid transparent; transition: color .2s var(--ease), border-color .2s var(--ease);
}
.contact__links a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--hairline); background: color-mix(in srgb, var(--bg-2) 72%, transparent); }
.site-footer__inner {
  max-width: var(--maxw); margin-inline: auto; padding: var(--sp-5) var(--gutter);
  display: grid; grid-template-columns: 1fr auto; gap: var(--sp-3) var(--sp-4); align-items: center;
}
.site-footer__brand { display: inline-flex; align-items: center; gap: .5rem; font-family: var(--font-display); font-weight: 600; color: var(--text); }
.site-footer__brand em { color: var(--accent); }
.site-footer__brand span span { color: var(--text-dim); }
.site-footer__links { display: flex; gap: var(--sp-3); justify-content: flex-end; flex-wrap: wrap; }
.site-footer__links a { font-size: var(--step--1); color: var(--text-mute); transition: color .2s var(--ease); }
.site-footer__links a:hover { color: var(--accent); }
.site-footer__thesis { grid-column: 1 / -1; font-family: var(--font-display); font-size: var(--step-1); font-weight: 400; color: var(--text-dim); letter-spacing: -.01em; padding-top: var(--sp-3); border-top: 1px solid var(--hairline); }
.site-footer__legal { grid-column: 1 / -1; font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-mute); }

/* ---------- reveal-on-scroll ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav__menu {
    position: absolute; top: 100%; right: var(--gutter); left: var(--gutter);
    flex-direction: column; align-items: stretch; gap: .25rem;
    background: var(--surface); border: 1px solid var(--hairline);
    border-radius: var(--radius); padding: var(--sp-2);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .2s var(--ease), transform .2s var(--ease);
  }
  .nav__menu.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__menu a { padding: .7rem .8rem; }
  .nav__toggle { display: flex; }
  .steps { flex-direction: column; gap: var(--sp-4); padding-top: 0; }
  .steps::before { top: 1.375rem; bottom: 1.375rem; left: 1.375rem; right: auto; width: 2px; height: auto; transform: none; background: linear-gradient(180deg, var(--accent), var(--accent-line)); }
  .step { flex-direction: row; align-items: flex-start; text-align: left; gap: var(--sp-3); padding: 0; }
  .step__num { margin-bottom: 0; flex: none; }
  .svc { grid-template-columns: 1fr; gap: var(--sp-2); }
  .svc__points { grid-template-columns: 1fr; gap: .6rem; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .products, .founders, .founder-stats, .writing,
  .product-feature { grid-template-columns: 1fr; }
  .product-feature__art { order: -1; }
}
@media (max-width: 560px) {
  .facts { grid-template-columns: 1fr; }
  .founder-stats { grid-template-columns: repeat(2, 1fr); }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__links { justify-content: flex-start; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .founder:hover { transform: none; }
  .card:hover .card__art img { transform: none; }
}

/* brand logo mark */
.brand-logo { display: block; border-radius: 7px; object-fit: cover; flex: none; }

/* ---------- back to top ---------- */
.to-top {
  position: fixed; right: clamp(1rem, 3vw, 2rem); bottom: clamp(1rem, 3vw, 2rem);
  z-index: 60; width: 2.9rem; height: 2.9rem; border-radius: 999px;
  display: grid; place-items: center; cursor: pointer;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1px solid var(--hairline-2); color: var(--text-dim);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease),
              border-color .2s var(--ease), color .2s var(--ease), visibility .2s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- cookie consent ---------- */
.consent {
  position: fixed; left: clamp(1rem, 3vw, 2rem); right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem); z-index: 70;
  max-width: 34rem; margin-inline: auto;
  display: flex; flex-direction: column; gap: .9rem;
  padding: 1.1rem 1.2rem; border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--hairline-2);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45);
}
.consent[hidden] { display: none; }
.consent__text {
  color: var(--text-dim); margin: 0;
  font-size: var(--step--1); line-height: 1.55;
}
.consent__actions { display: flex; gap: .6rem; justify-content: flex-end; }
.consent__btn { padding: .5rem 1.1rem; }

/* ---------- 404 error page ---------- */
.error-page {
  min-height: 100vh; display: grid; place-items: center;
  padding: var(--sp-7) var(--gutter);
}
.error-page__inner { max-width: 40rem; text-align: left; }
.error-page__code {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(5rem, 18vw, 9rem); line-height: 1;
  color: var(--accent); margin: var(--sp-2) 0 var(--sp-3);
}
.error-page__title {
  font-family: var(--font-display); font-weight: 500;
  font-size: var(--step-2); color: var(--text); margin-bottom: var(--sp-2);
}
.error-page__sub {
  color: var(--text-dim); font-size: var(--step-0);
  line-height: 1.6; margin-bottom: var(--sp-4);
}

/* ============================================================
   Books — AI-Native Series (books.html + homepage shelf)
   ============================================================ */

/* ---------- cover: live HTML replica of the Leanpub covers ----------
   The 1600×2560 artwork is mapped to em units: 1em = 1/16 of the cover
   width (100px on the original), so each measure below is the original
   pixel value / 100. Container units keep it crisp at any size; the
   per-book accent arrives through --c. Serif lives only in here. */
.cover {
  --c: #e0a63e;
  --paper: #fbf5ea; --paper-2: #d8cdbb; --mono-dim: #b9ae9c; --tag-dim: #9c9280;
  --ink: #141110; --box: #1d1913; --box-2: #241f18; --box-line: #342e25;
  position: relative; width: 100%; aspect-ratio: 5 / 8;
  container-type: inline-size;
}
.cover__inner {
  position: absolute; inset: 0; overflow: hidden;
  font-size: 6.25cqw;
  display: flex; flex-direction: column;
  padding: 1.5em 1.3em 1.2em 1.5em;
  background:
    radial-gradient(12em 9em at 88% 6%, color-mix(in srgb, var(--c) 20%, transparent), transparent 60%),
    radial-gradient(9em 7em at 0% 100%, color-mix(in srgb, var(--c) 10%, transparent), transparent 55%),
    var(--ink);
  color: var(--paper);
  border-radius: .12em;
  box-shadow: 0 .3em .9em -.35em rgba(0, 0, 0, .8), 0 0 0 1px #ffffff0a;
  line-height: 1.2;
}
.cover__inner > * { display: block; position: relative; }
.cover__inner::before {
  content: ""; position: absolute; inset: 0; opacity: .05; pointer-events: none;
  background-image: linear-gradient(#fff 1px, transparent 1px), linear-gradient(90deg, #fff 1px, transparent 1px);
  background-size: .64em .64em;
}
.cover__inner::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: .2em; background: var(--c); }
.cover__eyebrow { font-family: var(--font-mono); font-size: .3em; letter-spacing: .32em; font-weight: 700; color: color-mix(in srgb, var(--c) 55%, #fff); }
.cover__caret { font-family: var(--font-mono); font-size: 1.5em; font-weight: 800; color: var(--c); line-height: .8; margin: .47em 0 .27em; }
.cover__kicker { font-family: var(--font-mono); font-size: .34em; letter-spacing: .14em; font-weight: 700; color: var(--mono-dim); margin-bottom: .76em; }
.cover__title { font-family: var(--font-serif); font-weight: 700; font-size: 1.5em; line-height: .98; letter-spacing: -.02em; color: var(--paper); }
.cover__rule { width: 2.2em; height: .14em; border-radius: .08em; background: var(--c); margin: .56em 0 .46em; }
.cover__sub { font-family: var(--font-sans); font-size: .5em; line-height: 1.28; color: var(--paper-2); max-width: 23.2em; }
.cover__spacer { flex: 1 1 auto; }
.cover__term { border: 1px solid var(--box-line); border-radius: .2em; background: var(--box); overflow: hidden; max-width: 12.2em; box-shadow: 0 .3em .8em -.3em #000; }
.cover__termbar { display: flex; gap: .14em; align-items: center; padding: .22em .26em; background: var(--box-2); border-bottom: 1px solid var(--box-line); }
.cover__termbar i { width: .18em; height: .18em; border-radius: 50%; display: block; }
.cover__termbar i:nth-child(1) { background: #e0603f; }
.cover__termbar i:nth-child(2) { background: #e0a53a; }
.cover__termbar i:nth-child(3) { background: #3ea864; }
.cover__termbody { padding: .34em .36em; font-family: var(--font-mono); font-size: .38em; color: color-mix(in srgb, var(--c) 55%, #fff); white-space: nowrap; overflow: hidden; min-height: 1.9em; }
.cover__termbody::after { content: "_"; animation: cover-blink 1.1s steps(1) infinite; }
@keyframes cover-blink { 50% { opacity: 0; } }
.cover__foot { display: flex; justify-content: space-between; align-items: flex-end; gap: .4em; margin-top: .8em; }
.cover__tags { font-family: var(--font-mono); font-size: .3em; letter-spacing: .1em; font-weight: 700; color: var(--tag-dim); max-width: 33em; }
.cover__series { font-family: var(--font-mono); font-size: .3em; letter-spacing: .2em; font-weight: 700; color: var(--c); border: .067em solid var(--c); padding: .53em .87em; border-radius: .4em; white-space: nowrap; }

/* ---------- homepage shelf ---------- */
.shelf-mini { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); margin-bottom: var(--sp-5); }
.shelf-mini__item { display: grid; gap: .9rem; }
.shelf-mini__item .cover { transform: rotate(-1.5deg); transition: transform .35s var(--ease); }
.shelf-mini__item:hover .cover, .shelf-mini__item:focus-visible .cover { transform: translateY(-6px); }
.shelf-mini__label { display: flex; align-items: center; gap: .55rem; font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-mute); }
.shelf-mini__label::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c); flex: none; }
.shelf-mini__label b { color: var(--text); font-weight: 500; }
/* unreleased titles: dimmed cover + mono "coming soon" ribbon on the link itself
   (kept off .cover: a pseudo-element with cq units on its own container stalls Chrome's painter) */
.is-soon { position: relative; }
.is-soon .cover { opacity: .78; }
.is-soon:hover .cover { opacity: 1; }
.is-soon::after {
  content: "coming soon"; position: absolute; top: 4%; right: 0; z-index: 2; pointer-events: none;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--bg); background: var(--text); padding: .3em .7em; border-radius: 4px 0 0 4px;
}
.fan__item.is-soon::after { left: 0; right: auto; top: 3%; border-radius: 0 4px 4px 0; }
.shelf-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-3); }
.shelf-foot__actions { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* ---------- books hero: text + fanned covers ---------- */
.hero--books .hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--sp-6); align-items: center; }
.hero--books .hero__title { max-width: 14ch; }
.creed {
  margin-top: var(--sp-4); padding-left: var(--sp-3); border-left: 2px solid var(--accent);
  font-family: var(--font-serif); font-size: var(--step-2); font-weight: 600; line-height: 1.22; letter-spacing: -.01em;
  color: var(--text); max-width: 30rem;
}
.picker { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: var(--sp-5); }
.picker__label { width: 100%; font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute); }
.pick {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .6rem 1rem; border: 1px solid var(--hairline-2); border-radius: 999px;
  font-size: var(--step-0); color: var(--text);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.pick::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c) 25%, transparent); }
.pick:hover { border-color: var(--c); background: var(--surface); }
.hero--books .metadata-row { margin-top: var(--sp-5); }
.fan { display: flex; align-items: flex-end; justify-content: center; padding: var(--sp-5) var(--sp-2) var(--sp-3); }
.fan__item { width: 40%; flex: none; position: relative; transform-origin: 50% 100%; transition: transform .5s var(--ease), filter .5s var(--ease); border-radius: 4px; }
.fan__item + .fan__item { margin-left: -14%; }
.fan__item:nth-child(1) { transform: rotate(-9deg) translateY(1.6rem); z-index: 1; }
.fan__item:nth-child(2) { transform: rotate(-3deg) translateY(.35rem); z-index: 2; }
.fan__item:nth-child(3) { transform: rotate(3deg) translateY(.35rem); z-index: 3; }
.fan__item:nth-child(4) { transform: rotate(9deg) translateY(1.6rem); z-index: 4; }
.fan:hover .fan__item { filter: brightness(.72); }
.fan__item:hover, .fan__item:focus-visible { transform: translateY(-1rem) scale(1.04); z-index: 5; filter: none; }

/* ---------- edition toggle ---------- */
.section__head--split { display: flex; justify-content: space-between; align-items: flex-end; gap: var(--sp-4); max-width: none; }
.section__head--split > div:first-child { max-width: 44rem; }
.edition { display: inline-flex; align-items: center; gap: .8rem; flex: none; padding-bottom: .25rem; }
.edition__label { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute); }
.seg { display: inline-flex; padding: 3px; border: 1px solid var(--hairline-2); border-radius: 999px; background: var(--surface); }
.seg__opt {
  border: 0; background: none; cursor: pointer; font: inherit;
  font-size: var(--step--1); color: var(--text-mute);
  padding: .45rem .95rem; border-radius: 999px;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.seg__opt:hover:not([aria-pressed="true"]) { color: var(--text); }
.seg__opt[aria-pressed="true"] { background: var(--text); color: var(--bg); }

/* ---------- the shelf: one row per book ---------- */
.book {
  display: grid; grid-template-columns: minmax(200px, 260px) 1fr;
  gap: var(--sp-5) var(--sp-6); align-items: start;
  padding-block: var(--sp-6); border-top: 1px solid var(--hairline);
}
.book:first-child { border-top: 0; padding-top: 0; }
.book:last-child { padding-bottom: 0; }
.book__cover { transform: rotate(-1.5deg); transition: transform .45s var(--ease); }
.book:hover .book__cover { transform: none; }
.book .kicker { flex-wrap: wrap; row-gap: .3rem; }
.book .kicker__num { color: var(--c); }
.book__top { display: flex; align-items: center; flex-wrap: wrap; gap: var(--sp-2) var(--sp-3); margin-top: var(--sp-2); }
.book__title { font-size: var(--step-3); }
.badge--soon { color: var(--text-dim); border-color: var(--hairline-2); }
.badge--soon::before { background: var(--text-mute); }
.book__sub { margin-top: .5rem; font-size: var(--step-1); color: var(--text-dim); max-width: 40rem; }
.book__pitch { margin-top: var(--sp-3); max-width: 40rem; }
.book__pitch strong { color: var(--text); }
.book__toc-label { margin-top: var(--sp-4); font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase; color: var(--text-mute); }
.book__toc { margin-top: var(--sp-2); display: grid; grid-template-columns: repeat(2, 1fr); gap: .45rem var(--sp-4); max-width: 40rem; counter-reset: ch; }
.book__toc li { position: relative; padding-left: 2.1rem; color: var(--text-dim); counter-increment: ch; }
.book__toc li::before { content: counter(ch, decimal-leading-zero); position: absolute; left: 0; top: .15em; font-family: var(--font-mono); font-size: var(--step--1); color: var(--c); }
.book__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-2) var(--sp-3); margin-top: var(--sp-4); }
.book__formats { font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-mute); }
.book--soon .book__cover { opacity: .85; }
.book--soon:hover .book__cover { opacity: 1; }

/* ---------- author ---------- */
.author { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--sp-5); align-items: start; }
.author__bio p + p { margin-top: var(--sp-2); }
.author__bio a { color: var(--text); border-bottom: 1px solid var(--hairline-2); transition: color .2s var(--ease), border-color .2s var(--ease); }
.author__bio a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.author__side { border-left: 2px solid var(--accent-line); padding-left: var(--sp-3); display: grid; gap: var(--sp-3); justify-items: start; }
.author__side .btn + .btn { margin-top: -.75rem; }

@media (max-width: 900px) {
  .hero--books .hero__inner { grid-template-columns: 1fr; gap: var(--sp-4); }
  .fan { padding: var(--sp-3) 0 0; }
  .fan__item { width: 30%; }
  .fan__item + .fan__item { margin-left: -7%; }
  .fan__item.is-soon::after { font-size: .55rem; }
  .section__head--split { flex-direction: column; align-items: flex-start; }
  .book { grid-template-columns: 1fr; gap: var(--sp-4); }
  .book__cover { max-width: 220px; }
  .shelf-mini { grid-template-columns: repeat(2, 1fr); }
  .author { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .book__toc { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .book__cover, .shelf-mini__item .cover, .fan__item, .card__art img { transition: none; }
  .fan__item:hover, .shelf-mini__item:hover .cover { transform: none; }
}