/* ============================================================
   ELEINA VALE — Global Styles
   ============================================================ */

:root {
  --sage: #8B9D83;
  --sage-dark: #6B7456;
  --cream: #F5F1E8;
  --ivory: #FFFEF7;
  --charcoal: #3A3A3A;
  --terracotta: #D4A373;
  --terracotta-soft: #D4A37366;
  --olive: #6B7456;

  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 4px 24px rgba(58, 58, 58, 0.08);
  --shadow-lift: 0 8px 32px rgba(58, 58, 58, 0.12);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --max-content: 720px;
  --max-books: 900px;
  --max-wide: 1140px;

  --font-head: "Montserrat", system-ui, -apple-system, sans-serif;
  --font-body: "Open Sans", system-ui, -apple-system, sans-serif;
  --font-serif: "Lora", Georgia, serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--charcoal);
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
h1 {
  font-weight: 600;
  font-size: clamp(2rem, 4.5vw, 3rem); /* 32–48 */
  line-height: 1.15;
  letter-spacing: -0.02em;
}
h2 {
  font-weight: 600;
  font-size: clamp(1.625rem, 3vw, 2.125rem); /* 26–34 */
  line-height: 1.2;
}
h3 {
  font-weight: 500;
  font-size: clamp(1.125rem, 2vw, 1.5rem); /* 18–24 */
  line-height: 1.3;
}
p { margin: 0 0 1em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

.sub {
  font-family: var(--font-body);
  color: var(--olive);
  font-size: 18px;
  line-height: 1.55;
}
.meta {
  font-family: var(--font-body);
  color: var(--olive);
  font-size: 13px;
  letter-spacing: 0.02em;
}
.caption {
  font-size: 14px;
  color: var(--olive);
}
.pull {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 20px;
  line-height: 1.5;
  color: var(--olive);
  border-left: 2px solid var(--terracotta);
  padding: 4px 0 4px 22px;
  margin: 28px 0;
}
.pull--center {
  border-left: 0;
  text-align: center;
  padding: 0;
  max-width: 640px;
  margin: 32px auto;
  position: relative;
}
.pull--center::before,
.pull--center::after {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  background: var(--terracotta);
  margin: 18px auto;
  opacity: 0.7;
}

.stars {
  color: var(--terracotta);
  font-size: 18px;
  letter-spacing: 2px;
  display: inline-block;
}

/* ---------- Layout ---------- */
.section {
  padding: 80px 24px;
}
.section--tight { padding: 64px 24px; }
.section--alt   { background: var(--ivory); }
.section--cream { background: var(--cream); }
.section--dark  { background: var(--charcoal); color: var(--cream); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--cream); }

.wrap {
  max-width: var(--max-content);
  margin: 0 auto;
}
.wrap--books { max-width: var(--max-books); }
.wrap--wide  { max-width: var(--max-wide); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split--reverse > :first-child { order: 2; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 14px;
}

.divider-line {
  height: 1px;
  background: var(--terracotta);
  opacity: 0.5;
  border: 0;
  margin: 64px auto;
  max-width: 120px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  transition: background 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
  text-align: center;
  line-height: 1;
}
.btn--primary {
  background: var(--sage);
  color: var(--ivory);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}
.btn--primary:hover { background: var(--sage-dark); }
.btn--ghost {
  background: transparent;
  color: var(--charcoal);
  border: 1.5px solid var(--sage);
}
.btn--ghost:hover { background: var(--cream); }
.btn--block { width: 100%; }
.btn--lg { padding: 18px 36px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 254, 247, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(212, 163, 115, 0.4);
}
.nav__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 16px 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.nav__logo {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 2px;
  color: var(--charcoal);
}
.nav__links {
  display: flex;
  gap: 32px;
  justify-content: center;
}
.nav__links a {
  font-size: 14px;
  color: var(--charcoal);
  position: relative;
  padding: 6px 0;
  transition: color 160ms;
}
.nav__links a:hover { color: var(--sage); }
.nav__links a.is-active::after {
  content: "";
  position: absolute;
  left: 50%; right: 50%;
  bottom: 0;
  height: 1px;
  background: var(--sage);
  transform: translateX(-50%);
  width: 16px;
}
.nav__cta {
  justify-self: end;
  display: flex;
  align-items: center;
}
.nav__cta .btn { padding: 12px 22px; font-size: 13px; }
.nav__burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: 6px;
}
.nav__burger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--charcoal);
  position: relative;
}
.nav__burger span::before,
.nav__burger span::after {
  content: ""; position: absolute; left: 0; right: 0;
  height: 1.5px; background: var(--charcoal);
}
.nav__burger span::before { top: -6px; }
.nav__burger span::after  { top:  6px; }

/* ---------- Hero ---------- */
.hero {
  padding: 80px 24px 64px;
  background: var(--cream);
  position: relative;
  overflow: hidden;
}
.hero__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.25rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
}
.hero .sub { margin: 18px 0 32px; max-width: 520px; }
.hero__trust {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  color: var(--olive);
  font-size: 13px;
  flex-wrap: wrap;
}
.hero__trust .sep {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--terracotta);
}
.hero__trust--proof { margin-top: 14px; gap: 10px; }
.hero__trust .purchased { color: var(--ink, #3A3A3A); font-size: 14px; }
.hero__trust .purchased strong { color: var(--olive); font-weight: 600; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Cards ---------- */
.card {
  background: var(--ivory);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-soft);
  border-top: 2px solid var(--terracotta);
}

/* Chapter list */
.chapters { display: grid; gap: 18px; margin-top: 36px; }
.chapter {
  background: var(--ivory);
  border-left: 3px solid var(--terracotta);
  padding: 22px 26px;
  border-radius: 4px;
  box-shadow: var(--shadow-soft);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: start;
}
.chapter__num {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sage);
  text-transform: uppercase;
  padding-top: 4px;
  white-space: nowrap;
}
.chapter h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}
.chapter p { color: var(--charcoal); margin: 0; }
.chapter ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 6px;
}
.chapter ul li {
  font-size: 14px;
  color: var(--olive);
  padding-left: 18px;
  position: relative;
}
.chapter ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 8px; height: 1px;
  background: var(--terracotta);
}

/* Timeline */
.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 40px;
}
.t-card {
  background: var(--ivory);
  border-radius: var(--radius-md);
  padding: 28px 26px 26px;
  box-shadow: var(--shadow-soft);
  position: relative;
}
.t-card__days {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--terracotta);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.t-card__days::before {
  content: "";
  width: 24px; height: 2px;
  background: var(--terracotta);
}
.t-card p { font-size: 15px; line-height: 1.6; margin: 0; }

/* Testimonials */
.testimonials {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 40px;
}
.testimonial {
  background: var(--ivory);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  box-shadow: var(--shadow-soft);
  border-top: 2px solid var(--terracotta);
  display: flex;
  flex-direction: column;
}
.testimonial blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--charcoal);
  margin: 0 0 16px;
  flex: 1;
}
.testimonial cite {
  font-style: normal;
  font-size: 13px;
  color: var(--olive);
  display: flex;
  align-items: center;
  gap: 8px;
}
.testimonial cite::before {
  content: "";
  width: 16px; height: 1px;
  background: var(--terracotta);
}

/* FAQ accordion */
.faq { display: grid; gap: 0; margin-top: 32px; }
.faq__item {
  border-top: 1px solid rgba(212, 163, 115, 0.4);
}
.faq__item:last-child { border-bottom: 1px solid rgba(212, 163, 115, 0.4); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  padding: 22px 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 17px;
  color: var(--charcoal);
  gap: 24px;
}
.faq__icon {
  width: 24px; height: 24px;
  position: relative;
  flex-shrink: 0;
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: var(--sage);
  transition: transform 240ms ease;
}
.faq__icon::before { top: 50%; left: 4px; right: 4px; height: 1.5px; transform: translateY(-50%); }
.faq__icon::after  { left: 50%; top: 4px; bottom: 4px; width: 1.5px; transform: translateX(-50%); }
.faq__item.is-open .faq__icon::after { transform: translateX(-50%) rotate(90deg); opacity: 0; }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 320ms ease;
  color: var(--charcoal);
}
.faq__a > div { padding: 0 0 22px; max-width: 640px; color: var(--charcoal); }
.faq__item.is-open .faq__a { max-height: 400px; }

/* Offer box */
.offer {
  background: var(--ivory);
  color: var(--charcoal);
  border-radius: var(--radius-md);
  max-width: 520px;
  margin: 40px auto 0;
  padding: 40px 36px;
  box-shadow: var(--shadow-lift);
  text-align: left;
}
.offer__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(212, 163, 115, 0.4);
}
.offer__head h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}
.offer__checks {
  list-style: none;
  padding: 0;
  margin: 22px 0 28px;
  display: grid;
  gap: 12px;
}
.offer__checks li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15px;
}
.offer__checks li svg { margin-top: 4px; }
.offer__checks li.bonus { color: var(--olive); }
.offer__checks li.bonus strong { color: var(--charcoal); }

.offer__price {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
}
.offer__price .num {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 36px;
  color: var(--charcoal);
}
.offer__price .lbl { font-size: 13px; color: var(--olive); }

.offer__secure {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--olive);
  margin-top: 14px;
  justify-content: center;
}

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--charcoal);
  color: var(--cream);
  padding: 56px 24px 44px;
}
.site-footer__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  display: grid;
  gap: 28px;
}
.site-footer__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
  color: var(--cream);
}
.site-footer__row .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--terracotta); opacity: 0.7; }
.site-footer a { color: var(--sage); }
.site-footer a:hover { color: var(--terracotta); }
.site-footer__legal {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(245, 241, 232, 0.7);
  max-width: 760px;
}

/* ---------- Popup ---------- */
.popup-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 280ms ease;
}
.popup-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}
.popup {
  background: var(--ivory);
  border-radius: var(--radius-lg);
  max-width: 440px;
  width: 100%;
  padding: 40px 34px 32px;
  box-shadow: var(--shadow-lift);
  position: relative;
  transform: translateY(12px);
  transition: transform 320ms cubic-bezier(.2,.7,.2,1);
}
.popup-overlay.is-active .popup { transform: translateY(0); }
.popup__close {
  position: absolute;
  top: 14px; right: 14px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: var(--olive);
  border-radius: 50%;
  transition: color 160ms, background 160ms;
}
.popup__close:hover { color: var(--charcoal); background: var(--cream); }
.popup__eyebrow {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--terracotta);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.popup h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 14px;
  line-height: 1.25;
}
.popup em {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--charcoal);
}
.popup__form { margin-top: 22px; display: grid; gap: 12px; }
.popup__form input[type="email"] {
  width: 100%;
  border: 1.5px solid var(--sage);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--charcoal);
  background: var(--ivory);
  transition: border-color 160ms, box-shadow 160ms;
}
.popup__form input[type="email"]:focus {
  outline: none;
  border-color: var(--sage-dark);
  box-shadow: 0 0 0 3px rgba(139, 157, 131, 0.18);
}
.popup__micro {
  font-size: 12px;
  color: var(--olive);
  text-align: center;
  margin-top: 6px;
}
.popup__dismiss {
  display: block;
  margin: 14px auto 0;
  font-size: 12px;
  color: var(--olive);
  text-decoration: none;
  text-align: center;
  padding: 4px;
}
.popup__dismiss:hover { text-decoration: underline; }
.popup__success {
  display: none;
  text-align: center;
  padding: 12px 0;
  color: var(--sage-dark);
  font-family: var(--font-head);
  font-weight: 500;
}
.popup.is-success .popup__form,
.popup.is-success h2,
.popup.is-success p,
.popup.is-success .popup__eyebrow { display: none; }
.popup.is-success .popup__success { display: block; }

/* ---------- Image placeholders ---------- */
.ebook-cover {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 3 / 4;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 18px 30px rgba(58, 58, 58, 0.18)) drop-shadow(0 4px 8px rgba(58, 58, 58, 0.10));
}
.portrait {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  background: var(--ivory);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

/* ---------- Books page ---------- */
.book-row { padding: 96px 24px; }
.book-row__inner {
  max-width: var(--max-books);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 72px;
  align-items: center;
}
.book-row--reverse .book-row__inner > :first-child { order: 2; }
.book-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--terracotta);
  color: var(--ivory);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.book-meta {
  font-size: 14px;
  color: var(--olive);
  margin: 4px 0 22px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.book-meta .dot { width: 3px; height: 3px; background: var(--terracotta); border-radius: 50%; opacity: 0.7; }

.checklist {
  list-style: none;
  padding: 0;
  margin: 22px 0 28px;
  display: grid;
  gap: 10px;
}
.checklist li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.55;
}
.checklist li svg { margin-top: 4px; flex-shrink: 0; }

.week-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0 8px;
}
.week-card {
  background: var(--cream);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  border-left: 3px solid var(--terracotta);
}
.week-card__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage-dark);
  margin-bottom: 8px;
}
.week-card p { font-size: 13.5px; color: var(--charcoal); margin: 0; line-height: 1.55; }

/* Bundle */
.bundle {
  background: var(--ivory);
  color: var(--charcoal);
  border-radius: var(--radius-lg);
  max-width: 520px;
  margin: 0 auto;
  padding: 40px 36px;
  box-shadow: var(--shadow-lift);
}
.bundle__items {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}
.bundle__items li {
  display: flex; justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(212, 163, 115, 0.5);
  font-size: 15px;
}
.bundle__items li:last-child { border-bottom: 0; }
.bundle__total {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--olive);
  padding: 8px 0 4px;
}
.bundle__price {
  display: flex; justify-content: space-between;
  align-items: baseline;
  margin: 14px 0 8px;
}
.bundle__price .lbl { font-family: var(--font-head); font-weight: 600; font-size: 15px; }
.bundle__price .num { font-family: var(--font-head); font-weight: 700; font-size: 28px; }
.bundle__save {
  display: inline-block;
  background: rgba(139, 157, 131, 0.15);
  color: var(--sage-dark);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}

/* About page */
.about-hero {
  padding: 120px 24px 80px;
  background: var(--cream);
}
.about-hero__inner {
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}
.about-credentials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin: 40px 0;
}
.credential {
  background: var(--ivory);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-soft);
  border-top: 2px solid var(--terracotta);
}
.credential__num {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 28px;
  color: var(--sage-dark);
  line-height: 1;
  margin-bottom: 6px;
}
.credential__lbl {
  font-size: 13px;
  color: var(--olive);
  line-height: 1.4;
}

/* Thank you page */
.thanks-hero {
  padding: 120px 24px 64px;
  background: var(--cream);
  text-align: center;
}
.thanks-hero h1 {
  color: var(--sage-dark);
  max-width: 720px;
  margin: 0 auto 18px;
}
.thanks-hero p { max-width: 560px; margin: 0 auto 12px; }
.thanks-icon {
  width: 64px; height: 64px;
  margin: 0 auto 28px;
  border-radius: 50%;
  background: rgba(139, 157, 131, 0.18);
  display: flex; align-items: center; justify-content: center;
  color: var(--sage-dark);
}
.upsell {
  background: var(--ivory);
  padding: 96px 24px;
}
.upsell__inner {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero__inner,
  .split,
  .book-row__inner,
  .about-hero__inner,
  .upsell__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .split--reverse > :first-child,
  .book-row--reverse .book-row__inner > :first-child { order: 0; }
  .testimonials { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .week-grid { grid-template-columns: 1fr; }
  .about-credentials { grid-template-columns: 1fr; }
  .section { padding: 64px 20px; }
  .book-row { padding: 64px 20px; }
  .hero { padding: 56px 20px 40px; }
  .ebook-cover { max-width: 280px; }
}

@media (max-width: 640px) {
  .nav__inner { grid-template-columns: 1fr auto; }
  .nav__links { display: none; }
  .nav__cta .btn { padding: 10px 16px; font-size: 12px; }
  .nav__burger { display: flex; }
  .hero h1 { font-size: 2rem; }
  .btn--mobile-block { width: 100%; }
}