/* ===================================================================
   ELIAS YODER · An Almanac
   Aesthetic: vintage American almanac meets modern editorial
   Type: Fraunces (variable serif) + JetBrains Mono (numerical/eyebrow)
   Palette: dominant cream paper + ink black + oxblood + aged gold + sage
   =================================================================== */

:root {
  --paper:        #F2EBD4;
  --paper-warm:   #ECE3C2;
  --paper-deep:   #DCD0AA;
  --ink:          #15110B;
  --ink-soft:     #2B241A;
  --ink-mid:      #4A4131;
  --ink-mute:     #786B53;
  --rule:         #C4B58A;
  --oxblood:      #7A1F0E;
  --oxblood-dk:   #5A1308;
  --gold:         #BA8C3E;
  --gold-soft:    #D4B070;
  --sage:         #4A5A3D;
  --sage-dk:      #2F3B26;

  --serif:    'Fraunces', 'EB Garamond', 'Iowan Old Style', Georgia, serif;
  --mono:     'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
  --container: 1240px;
  --gutter: 32px;

  --shadow-cover: 0 30px 60px -20px rgba(21,17,11,0.4), 0 10px 20px -8px rgba(21,17,11,0.3), 0 1px 0 rgba(21,17,11,0.18);
  --shadow-page: 0 22px 60px -10px rgba(21,17,11,0.25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-variation-settings: "SOFT" 50, "opsz" 14;
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Paper grain overlay — subtle SVG noise, applied site-wide */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.08  0 0 0 0 0.06  0 0 0 0 0.04  0 0 0 0.10 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 2; }

a { color: var(--oxblood); text-decoration-thickness: 1px; text-underline-offset: 3px; }
img, svg { display: block; max-width: 100%; }

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  font-variation-settings: "SOFT" 30, "opsz" 144;
  color: var(--ink);
  margin: 0 0 .5em;
  line-height: 1.04;
  letter-spacing: -0.022em;
}
h1 { font-size: clamp(3rem, 7vw, 6rem); font-weight: 500; }
h2 { font-size: clamp(2.2rem, 4.6vw, 3.8rem); }
h3 { font-size: 1.4rem; font-weight: 600; letter-spacing: -0.015em; }
p  { margin: 0 0 1em; color: var(--ink-soft); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--oxblood);
  font-weight: 500;
  margin: 0 0 18px;
}
.eyebrow--gold { color: var(--gold); }
.eyebrow--sage { color: var(--sage); }
.eyebrow--paper { color: var(--gold-soft); }

.display-num {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  color: var(--oxblood);
  font-size: clamp(3.5rem, 9vw, 7rem);
  line-height: 0.85;
  letter-spacing: -0.04em;
}

/* Decorative rule with center ornament */
.rule { display: flex; align-items: center; gap: 14px; margin: 28px 0; }
.rule::before, .rule::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
.rule__mark { color: var(--gold); font-size: 1.1rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  text-decoration: none;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  transition: background 0.25s ease, color 0.25s ease, transform 0.15s ease, box-shadow 0.25s ease;
  position: relative;
  white-space: nowrap;
}
.btn::after {
  content: "→";
  font-family: var(--serif);
  font-size: 1.1rem;
  letter-spacing: 0;
  transition: transform 0.25s ease;
}
.btn:hover { background: var(--oxblood); border-color: var(--oxblood); transform: translateY(-1px); box-shadow: 0 8px 18px -6px rgba(122,31,14,0.5); }
.btn:hover::after { transform: translateX(4px); }
.btn--ox { background: var(--oxblood); border-color: var(--oxblood); }
.btn--ox:hover { background: var(--oxblood-dk); border-color: var(--oxblood-dk); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--block { display: flex; width: 100%; justify-content: center; }
.btn--big { padding: 20px 34px; font-size: 0.84rem; }

/* Page-load stagger */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.rise { animation: riseIn 0.9s cubic-bezier(.16,.84,.27,1) both; }
.rise:nth-child(1) { animation-delay: 0.05s; }
.rise:nth-child(2) { animation-delay: 0.18s; }
.rise:nth-child(3) { animation-delay: 0.32s; }
.rise:nth-child(4) { animation-delay: 0.48s; }
.rise:nth-child(5) { animation-delay: 0.64s; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s cubic-bezier(.16,.84,.27,1), transform 0.9s cubic-bezier(.16,.84,.27,1); }
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* ============== MASTHEAD STRIPE ============== */
.masthead {
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--ink-soft);
  position: relative; z-index: 5;
}
.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 12px var(--gutter);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  max-width: var(--container);
  margin: 0 auto;
}
.masthead__left { color: var(--gold-soft); }
.masthead__center { display: flex; gap: 14px; align-items: center; }
.masthead__center span { opacity: 0.7; }
.masthead__timer {
  font-weight: 700;
  color: var(--paper);
  background: var(--oxblood);
  padding: 4px 10px;
  letter-spacing: 0.16em;
}
.masthead__right { text-align: right; color: var(--gold-soft); }
@media (max-width: 720px) {
  .masthead__inner { grid-template-columns: 1fr; gap: 6px; text-align: center; }
  .masthead__left, .masthead__right { display: none; }
}

/* ============== HERO ============== */
.hero {
  position: relative;
  padding: 96px 0 80px;
  background:
    radial-gradient(1200px 600px at 110% 10%, rgba(186,140,62,0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 90%, rgba(74,90,61,0.08), transparent 60%);
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 80px;
  align-items: center;
}
.hero__mark {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: var(--ink-mute);
  margin-bottom: 36px;
}
.hero__mark span:first-child { color: var(--oxblood); font-weight: 700; }
.hero__mark hr { flex: 1; border: 0; border-top: 1px solid var(--rule); margin: 0; }

.hero__headline {
  font-size: clamp(2.2rem, 4.4vw, 3.6rem);
  font-weight: 400;
  font-variation-settings: "SOFT" 30, "opsz" 144, "wght" 420;
  letter-spacing: -0.022em;
  line-height: 1.05;
  margin-bottom: 0;
}
.hero__headline em {
  font-style: italic;
  color: var(--oxblood);
  font-variation-settings: "SOFT" 100, "opsz" 144, "wght" 380;
}

.hero__sub {
  margin: 30px 0 36px;
  max-width: 50ch;
  font-size: 1.18rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.hero__sub::first-letter {
  font-family: var(--serif);
  font-weight: 500;
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  font-size: 3.4em;
  line-height: 0.85;
  float: left;
  margin: 8px 12px -2px 0;
  color: var(--oxblood);
}

.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 24px 0;
}
.hero__stats > div { padding: 0 8px; }
.hero__stats > div + div { border-left: 1px solid var(--rule); padding-left: 24px; }
.hero__stat-num {
  font-family: var(--serif);
  font-size: 2.1rem;
  font-weight: 500;
  font-variation-settings: "SOFT" 50, "opsz" 144;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 4px;
}
.hero__stat-num em { font-style: italic; color: var(--oxblood); font-variation-settings: "SOFT" 100, "opsz" 144; }
.hero__stat-lab {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
}

/* Hero portrait */
.hero__media {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 520px;
}
.hero__portrait {
  width: 100%;
  aspect-ratio: 4 / 5;
  background-image: url('author.jpg');
  background-size: cover;
  background-position: center 20%;
  background-color: var(--paper-deep);
  box-shadow: var(--shadow-page);
  position: relative;
  filter: contrast(1.04) saturate(0.92) sepia(0.06);
}
.hero__portrait::after {
  content: "";
  position: absolute; inset: 0;
  border: 1px solid rgba(21,17,11,0.18);
  pointer-events: none;
}
.hero__frame {
  position: absolute;
  inset: -14px;
  border: 1px solid var(--rule);
  pointer-events: none;
}
.hero__pull {
  position: absolute;
  left: -36px;
  bottom: -42px;
  background: var(--paper);
  padding: 22px 26px;
  max-width: 320px;
  box-shadow: var(--shadow-page);
  font-style: italic;
  font-size: 1.04rem;
  color: var(--ink);
  line-height: 1.4;
  font-variation-settings: "SOFT" 100, "opsz" 144;
}
.hero__pull::before {
  content: "“";
  position: absolute;
  top: -28px; left: 18px;
  font-family: var(--serif);
  font-size: 5rem;
  color: var(--oxblood);
  line-height: 1;
  font-style: normal;
}
.hero__pull small {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ============== SECTION CHROME ============== */
.sec { padding: 110px 0; position: relative; }
.sec__head { display: grid; grid-template-columns: 120px 1fr; gap: 48px; align-items: start; margin-bottom: 64px; }
.sec__num {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 5.4rem;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  color: var(--oxblood);
  line-height: 0.8;
  letter-spacing: -0.04em;
  position: relative;
  top: -10px;
}
.sec__title { max-width: 62ch; }
.sec__title h2 { margin-bottom: 18px; max-width: none; }
.sec__title .sec__lede { max-width: 56ch; }
.sec__lede { max-width: 60ch; font-size: 1.15rem; color: var(--ink-soft); }

@media (max-width: 760px) {
  .sec__head { grid-template-columns: 1fr; gap: 8px; margin-bottom: 44px; }
  .sec__num { font-size: 3.6rem; }
}

/* ============== LIBRARY (book showcase) ============== */
.library { background: var(--paper-warm); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.library__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 64px;
  align-items: end;
}
.book {
  display: flex; flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.45s cubic-bezier(.2,.8,.3,1);
}
.book:hover { transform: translateY(-8px); }
.book__cover-frame {
  position: relative;
  margin-bottom: 32px;
  padding: 12px;
  background: var(--paper);
  box-shadow: var(--shadow-page);
}
.book__cover {
  aspect-ratio: 3 / 4;
  box-shadow: var(--shadow-cover);
  background: var(--paper-deep);
  overflow: hidden;
  transition: box-shadow 0.4s ease;
}
.book__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.book:hover .book__cover { box-shadow: 0 40px 70px -18px rgba(21,17,11,0.5), 0 14px 24px -8px rgba(21,17,11,0.35); }
.book--featured .book__cover-frame { transform: scale(1.06); transform-origin: center bottom; }
.book__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 10px;
  font-weight: 500;
}
.book--featured .book__label { color: var(--oxblood); font-weight: 700; }
.book__title { font-size: 1.65rem; margin: 0 0 14px; letter-spacing: -0.02em; }
.book__desc { font-size: 1rem; color: var(--ink-soft); margin: 0 0 18px; line-height: 1.5; }
.book__meta {
  display: flex; align-items: baseline; gap: 14px;
  padding-top: 16px; border-top: 1px solid var(--rule);
}
.book__price {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 500;
  font-variation-settings: "SOFT" 50, "opsz" 144;
  color: var(--ink);
  line-height: 1;
}
.book__price em { font-style: italic; color: var(--oxblood); font-variation-settings: "SOFT" 100, "opsz" 144; }
.book__strike {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-mute);
  text-decoration: line-through;
}
.book__link {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--oxblood);
  font-weight: 500;
}

/* ============== THE MATH (problem/solution) ============== */
.math {
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--ink-soft);
  border-bottom: 1px solid var(--ink-soft);
}
.math h2 { color: var(--paper); }
.math .sec__num { color: var(--gold-soft); }
.math .sec__lede { color: var(--paper-deep); }
.math .eyebrow { color: var(--gold-soft); }

.math__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.math__col h3 {
  color: var(--paper);
  font-size: 1.6rem;
  margin-bottom: 28px;
  display: flex; align-items: baseline; gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink-mid);
}
.math__col h3 span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-soft);
}
.math__col ul { list-style: none; padding: 0; margin: 0; }
.math__col li {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px dashed var(--ink-mid);
  font-size: 1.02rem;
  color: var(--paper-deep);
}
.math__col li span:last-child {
  font-family: var(--serif);
  color: var(--paper);
  font-weight: 500;
  font-size: 1.15rem;
  font-variation-settings: "SOFT" 50, "opsz" 144;
}
.math__total {
  margin-top: 24px;
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 22px 0 4px;
  border-top: 2px solid var(--gold);
}
.math__total .lab {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-soft);
}
.math__total .num {
  font-family: var(--serif);
  font-size: 2.6rem;
  line-height: 1;
  font-weight: 500;
  font-variation-settings: "SOFT" 50, "opsz" 144;
}
.math__col--bad .math__total .num { color: #E8C5A6; }
.math__col--good .math__total .num { color: var(--gold-soft); font-style: italic; font-variation-settings: "SOFT" 100, "opsz" 144; }
.math__note { margin-top: 18px; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--ink-mute); }
.math__delta { max-width: 760px; margin: 48px auto 0; padding: 22px 28px; background: var(--paper-2); border-left: 4px solid var(--oxblood); font-family: var(--serif); font-size: 1.05rem; line-height: 1.55; color: var(--ink); text-align: center; }
.math__delta strong { color: var(--oxblood); font-weight: 700; }

/* ============== INSIDE (the 93 methods) ============== */
.inside { background: var(--paper); }
.inside__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.inside__card { position: relative; }
.inside__card-head {
  display: flex; align-items: baseline; gap: 18px;
  padding-bottom: 22px; margin-bottom: 26px;
  border-bottom: 1px solid var(--rule);
}
.inside__card-head h3 { font-size: 1.7rem; margin: 0; letter-spacing: -0.02em; }
.inside__card-head .label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--oxblood);
  font-weight: 500;
}
.inside__list { list-style: none; padding: 0; margin: 0; counter-reset: chapter; }
.inside__list li {
  display: grid; grid-template-columns: 36px 1fr;
  gap: 14px; align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dotted var(--rule);
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.45;
}
.inside__list li:last-child { border-bottom: none; }
.inside__list li::before {
  counter-increment: chapter;
  content: counter(chapter, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.1em;
}

/* ============== REVIEWS (pull-quote spread) ============== */
.reviews { background: var(--paper-warm); }
.reviews__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.review {
  position: relative;
  padding: 48px 28px 28px;
  background: var(--paper);
  border: 1px solid var(--rule);
}
.review::before {
  content: "“";
  position: absolute;
  top: -10px; left: 22px;
  font-family: var(--serif);
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  font-size: 6rem;
  color: var(--oxblood);
  line-height: 0.6;
  background: var(--paper);
  padding: 0 10px;
}
.review__stars { color: var(--gold); letter-spacing: 3px; font-size: 0.92rem; margin-bottom: 14px; }
.review__body {
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--ink);
  font-style: italic;
  font-variation-settings: "SOFT" 60, "opsz" 144;
  margin: 0 0 18px;
}
.review__by {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

/* ============== ABOUT ============== */
.about { background: var(--paper); }
.about__grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 80px; align-items: start; }
.about__media {
  width: 100%;
  aspect-ratio: 4 / 5;
  background-image: url('author.jpg');
  background-size: cover;
  background-position: center 22%;
  background-color: var(--paper-deep);
  box-shadow: var(--shadow-page);
  position: relative;
  filter: contrast(1.04) saturate(0.92) sepia(0.08);
}
.about__media::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(21,17,11,0.18); }
.about__frame { position: absolute; inset: -14px; border: 1px solid var(--rule); pointer-events: none; }
.about__copy h2 { font-size: clamp(2.4rem, 4vw, 3.4rem); margin-bottom: 22px; }
.about__copy p { font-size: 1.08rem; line-height: 1.6; margin-bottom: 1em; }
.about__copy p:first-of-type::first-letter {
  font-family: var(--serif);
  font-weight: 500;
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  font-size: 4.2em;
  line-height: 0.82;
  float: left;
  margin: 6px 14px -6px 0;
  color: var(--oxblood);
}
.about__pull {
  margin: 32px 0;
  padding: 26px 30px;
  border-left: 3px solid var(--gold);
  background: var(--paper-warm);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.4;
  color: var(--ink);
  font-variation-settings: "SOFT" 100, "opsz" 144;
}
.about__sig {
  display: inline-flex; align-items: center; gap: 14px;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.about__sig::before { content: ""; width: 30px; height: 1px; background: var(--gold); }

/* ============== EDITIONS (pricing) ============== */
.editions { background: var(--paper-warm); border-top: 1px solid var(--rule); }
.editions__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.tier {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 44px 32px 32px;
  display: flex; flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.tier:hover { transform: translateY(-4px); box-shadow: var(--shadow-page); }
.tier--featured {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  transform: scale(1.03);
  box-shadow: var(--shadow-page);
}
.tier--featured:hover { transform: scale(1.03) translateY(-4px); }
.tier--featured .tier__label { color: var(--gold-soft); }
.tier--featured .tier__title { color: var(--paper); }
.tier--featured .tier__tagline { color: var(--paper-deep); }
.tier--featured .tier__price { color: var(--paper); border-color: var(--ink-mid); }
.tier--featured .tier__price em { color: var(--gold-soft); }
.tier--featured .tier__price-old { color: var(--ink-mute); }
.tier--featured .tier__features li { color: var(--paper-deep); border-color: var(--ink-mid); }
.tier--featured .tier__features li::before { color: var(--gold); }
.tier--featured .tier__features li strong { color: var(--paper); }
.tier--featured .tier__foot { color: var(--ink-mute); }

.tier__ribbon {
  position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  background: var(--oxblood);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  padding: 8px 20px;
  font-weight: 600;
}
.tier__cover {
  width: 120px; margin: 0 auto 26px;
  aspect-ratio: 3 / 4;
  box-shadow: var(--shadow-cover);
  overflow: hidden;
}
.tier__cover img { width: 100%; height: 100%; object-fit: cover; }
.tier__label {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 8px;
  font-weight: 500;
}
.tier__title { text-align: center; font-size: 1.5rem; margin: 0 0 8px; letter-spacing: -0.02em; }
.tier__tagline { text-align: center; color: var(--ink-mute); font-size: 0.96rem; margin: 0 0 24px; }
.tier__price {
  display: flex; justify-content: center; align-items: baseline; gap: 12px;
  padding: 22px 0; margin-bottom: 24px;
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.tier__price em {
  font-family: var(--serif);
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  font-weight: 500;
  font-size: 3rem;
  line-height: 1;
  color: var(--ink);
}
.tier__price-old { font-family: var(--mono); font-size: 0.9rem; color: var(--ink-mute); text-decoration: line-through; }
.tier__features { list-style: none; padding: 0; margin: 0 0 28px; flex: 1; }
.tier__features li {
  padding: 11px 0 11px 26px;
  position: relative;
  font-size: 0.96rem;
  color: var(--ink-soft);
  line-height: 1.5;
  border-bottom: 1px dotted var(--rule);
}
.tier__features li:last-child { border-bottom: none; }
.tier__features li::before {
  content: "✦";
  position: absolute; left: 0; top: 11px;
  color: var(--gold);
  font-size: 0.85rem;
}
.tier__features li strong { color: var(--ink); font-family: var(--serif); }
.tier__foot {
  margin-top: 14px;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.guarantees {
  margin-top: 56px;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.guarantees span { margin: 0 14px; }

/* ============== FAQ ============== */
.faq { background: var(--paper); }
.faq__list { max-width: 820px; margin: 0 auto; }
.faq__item {
  border-bottom: 1px solid var(--rule);
  padding: 4px 0;
}
.faq__item summary {
  cursor: pointer;
  padding: 26px 36px 26px 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.32rem;
  letter-spacing: -0.015em;
  color: var(--ink);
  list-style: none;
  position: relative;
  font-variation-settings: "SOFT" 40, "opsz" 144;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-size: 2rem; color: var(--oxblood); font-weight: 300;
  transition: transform 0.3s ease;
  line-height: 1;
}
.faq__item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq__item p {
  padding: 0 60px 26px 0;
  margin: 0;
  font-size: 1.04rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ============== ORDER (final CTA) ============== */
.order {
  background: var(--ink);
  color: var(--paper);
  text-align: center;
  padding: 130px 0 110px;
  position: relative;
  overflow: hidden;
}
.order::before, .order::after {
  content: "";
  position: absolute;
  width: 700px; height: 700px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
}
.order::before { background: var(--oxblood); top: -200px; left: -200px; }
.order::after { background: var(--sage-dk); bottom: -300px; right: -200px; }
.order .container { position: relative; z-index: 2; }
.order .eyebrow { color: var(--gold-soft); }
.order h2 { color: var(--paper); font-size: clamp(2.6rem, 5vw, 4.4rem); max-width: 18ch; margin: 0 auto 20px; }
.order p { color: var(--paper-deep); font-size: 1.16rem; max-width: 52ch; margin: 0 auto 40px; }
.order .btn { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.order .btn:hover { background: var(--oxblood); color: var(--paper); border-color: var(--oxblood); }

/* ============== FOOTER / COLOPHON ============== */
.colophon {
  background: #0F0C07;
  color: var(--ink-mute);
  padding: 50px 0 38px;
}
.colophon__row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 30px;
  padding-bottom: 22px;
  border-bottom: 1px solid #2A2418;
  margin-bottom: 22px;
}
.colophon__brand { font-family: var(--serif); font-style: italic; font-size: 1.6rem; color: var(--paper); }
.colophon__brand em { color: var(--gold-soft); }
.colophon__nav { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.colophon__nav a { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--paper-deep); text-decoration: none; }
.colophon__nav a:hover { color: var(--paper); }
.colophon__date { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold-soft); text-align: right; }
.colophon__legal { font-size: 0.78rem; color: #6B6248; max-width: 80ch; line-height: 1.55; }

/* ============== EXIT MODAL ============== */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal[hidden] { display: none; }
.modal__bd { position: absolute; inset: 0; background: rgba(15,12,7,0.72); backdrop-filter: blur(6px); }
.modal__card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 50px 42px 36px;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-page);
  animation: riseIn 0.4s cubic-bezier(.16,.84,.27,1) both;
  text-align: center;
}
.modal__close {
  position: absolute; top: 14px; right: 18px;
  background: transparent; border: 0;
  font-family: var(--serif);
  font-size: 1.8rem; cursor: pointer; color: var(--ink-mute); line-height: 1;
}
.modal__close:hover { color: var(--ink); }
.modal__cover { width: 120px; aspect-ratio: 3/4; margin: 0 auto 22px; box-shadow: var(--shadow-cover); }
.modal__cover img { width: 100%; height: 100%; object-fit: cover; }
.modal__card h2 { font-size: 1.9rem; margin-bottom: 14px; }
.modal__card h2 em { font-style: italic; color: var(--oxblood); font-variation-settings: "SOFT" 100, "opsz" 144; }
.modal__card p { margin-bottom: 22px; font-size: 1rem; }
.modal__small { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-mute); margin-top: 16px; }
.modal__small a { color: var(--oxblood); }

/* ============== RESPONSIVE ============== */
@media (max-width: 1040px) {
  .hero__grid { grid-template-columns: 1fr; gap: 56px; }
  .hero__media { order: -1; max-width: 420px; margin: 0 auto; justify-self: center; }
  .hero__pull { display: none; }
  .library__grid { grid-template-columns: 1fr; gap: 64px; max-width: 380px; margin: 0 auto; }
  .math__grid, .inside__grid, .about__grid { grid-template-columns: 1fr; gap: 48px; }
  .editions__grid { grid-template-columns: 1fr; }
  .tier--featured { transform: none; order: -1; }
  .tier--featured:hover { transform: translateY(-4px); }
  .reviews__grid { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
  .hero__stats > div + div { padding-left: 14px; }
}
@media (max-width: 640px) {
  .sec, .hero { padding: 76px 0; }
  .hero { padding-top: 64px; }
  .hero__cta .btn { flex: 1; justify-content: center; }
  .hero__stats { grid-template-columns: 1fr; }
  .hero__stats > div + div { border-left: 0; border-top: 1px solid var(--rule); padding: 16px 0 0; margin-top: 6px; }
  :root { --gutter: 22px; }
  .tier { padding: 36px 24px 26px; }
  .editions__grid { gap: 18px; }
}

/* Inlined cover SVGs */
.cover-svg { display: block; width: 100%; height: 100%; }

/* ============== SALES NOTIFICATION ============== */
.salenotif {
  position: fixed;
  bottom: 22px;
  left: 22px;
  width: 340px;
  max-width: calc(100vw - 44px);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 16px 38px 16px 16px;
  box-shadow: 0 20px 50px -10px rgba(21,17,11,0.35), 0 6px 14px -6px rgba(21,17,11,0.20);
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 60;
  font-family: var(--serif);
  transform: translateX(-130%);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(.16,.84,.27,1), opacity 0.45s ease;
  pointer-events: auto;
}
.salenotif.is-show { transform: translateX(0); opacity: 1; }
.salenotif::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--oxblood);
}
.salenotif__avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gold-soft);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  font-size: 1.15rem;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.4), 0 1px 2px rgba(0,0,0,0.1);
}
.salenotif__body { flex: 1; min-width: 0; font-size: 0.92rem; line-height: 1.32; color: var(--ink); }
.salenotif__name { font-weight: 600; margin-bottom: 1px; }
.salenotif__what { color: var(--ink-soft); font-size: 0.9rem; }
.salenotif__what strong { color: var(--oxblood); font-weight: 600; }
.salenotif__time {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--ink-mute);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.salenotif__close {
  position: absolute;
  top: 6px; right: 8px;
  background: transparent;
  border: 0;
  color: var(--ink-mute);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
}
.salenotif__close:hover { color: var(--ink); }
@media (max-width: 580px) {
  .salenotif { bottom: 12px; left: 12px; width: calc(100vw - 24px); }
}


/* Single-product book cover (real PDF cover, inlined) */
.book-cover-real {
  width: 100%;
  aspect-ratio: 1055 / 1491;
  background-image: url('cover.jpg');
  background-size: cover;
  background-position: center;
  background-color: var(--paper-deep);
  box-shadow: var(--shadow-cover);
  border-radius: 2px;
  transition: transform 0.45s cubic-bezier(.2,.8,.3,1), box-shadow 0.4s ease;
}
.book-cover-real:hover { transform: translateY(-6px); box-shadow: 0 40px 70px -18px rgba(21,17,11,0.5), 0 14px 24px -8px rgba(21,17,11,0.35); }

/* Single-product layout overrides */
.single-product { display: grid; grid-template-columns: minmax(280px, 0.85fr) 1.15fr; gap: 72px; align-items: start; }
.single-product__cover-frame { width: 100%; padding: 14px; background: var(--paper); box-shadow: var(--shadow-page); max-width: 480px; margin: 0 auto; }
.single-product__copy h3 { font-size: 1.9rem; margin: 0 0 10px; letter-spacing: -0.022em; }
.single-product__tag { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--oxblood); margin-bottom: 18px; font-weight: 500; }
.single-product__lede { font-size: 1.12rem; color: var(--ink-soft); margin-bottom: 22px; line-height: 1.55; }
.single-product__price-row { display: flex; align-items: baseline; gap: 16px; padding: 18px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin-bottom: 26px; }
.single-product__price { font-family: var(--serif); font-size: 3.2rem; font-weight: 500; color: var(--ink); line-height: 1; font-variation-settings: "SOFT" 50, "opsz" 144; }
.single-product__price em { font-style: italic; color: var(--oxblood); font-variation-settings: "SOFT" 100, "opsz" 144; }
.single-product__strike { font-family: var(--mono); font-size: 0.94rem; color: var(--ink-mute); text-decoration: line-through; }
.single-product__features { list-style: none; padding: 0; margin: 0 0 28px; }
.single-product__features li { padding: 10px 0 10px 28px; position: relative; font-size: 1rem; color: var(--ink-soft); line-height: 1.5; border-bottom: 1px dotted var(--rule); }
.single-product__features li:last-child { border-bottom: 0; }
.single-product__features li::before { content: "\2726"; position: absolute; left: 0; top: 10px; color: var(--gold); font-size: 0.85rem; }
.single-product__features li strong { color: var(--ink); font-family: var(--serif); }
.single-product__foot { margin-top: 14px; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-mute); text-align: center; }

/* Value stack — "What you get for $47" */
.includes__head { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--oxblood); font-weight: 700; margin: 28px 0 14px; }
.includes { list-style: none; padding: 0; margin: 0 0 24px; border-top: 1px solid var(--rule); }
.includes li { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--rule); }
.includes .includes__name { flex: 1; font-family: var(--serif); font-size: 0.98rem; line-height: 1.45; color: var(--ink); }
.includes .includes__name strong { color: var(--ink); font-weight: 600; }
.includes .includes__value { font-family: var(--mono); font-size: 0.9rem; color: var(--ink-mute); font-weight: 500; white-space: nowrap; padding-top: 2px; }
.includes .includes__total { padding-top: 18px; padding-bottom: 18px; }
.includes .includes__total .includes__name strong,
.includes .includes__total .includes__value strong { color: var(--ink); font-size: 1.05rem; }
.includes .includes__today { background: rgba(122,31,14,0.06); margin: 0 -14px; padding: 18px 14px; border-bottom: none; }
.includes .includes__today .includes__name strong,
.includes .includes__today .includes__value strong { color: var(--oxblood); font-size: 1.25rem; font-family: var(--serif); font-style: italic; }

/* "Volume I of an ongoing series" editorial note under the book showcase */
.next-vol { max-width: 720px; margin: 64px auto 0; padding: 24px 32px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); font-family: var(--serif); font-size: 0.95rem; line-height: 1.65; color: var(--ink-mute); text-align: center; }
.next-vol em { color: var(--oxblood); font-style: italic; font-weight: 600; }

/* Systems grid (replaces Vol I/Vol II two-column) */
.systems { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; }
.systems__group { background: rgba(28,22,12,0.03); border: 1px solid var(--rule); border-radius: var(--radius-lg); padding: 30px; }
.systems__group h3 { color: var(--ink); margin: 0 0 6px; font-size: 1.3rem; font-family: var(--serif); font-weight: 600; letter-spacing: -0.012em; }
.systems__group .label { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--oxblood); font-weight: 700; margin-bottom: 18px; display: block; }
.systems__list { list-style: none; padding: 0; margin: 0; counter-reset: sys; }
.systems__list li { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px dotted rgba(28,22,12,0.18); font-size: 0.96rem; color: var(--ink); line-height: 1.45; }
.systems__list li:last-child { border-bottom: none; }
.systems__list li::before { counter-increment: sys; content: counter(sys, decimal-leading-zero); font-family: var(--mono); font-size: 0.7rem; color: var(--gold); letter-spacing: 0.1em; padding-top: 3px; font-weight: 700; }

@media (max-width: 980px) {
  .single-product { grid-template-columns: 1fr; gap: 40px; }
  .single-product__cover-frame { max-width: 320px; }
  .systems { grid-template-columns: 1fr; }
}