/* ============================================================
   THE MEETING BOOK — style.css
   Design: Editorial dark-ink with warm amber accents
   ============================================================ */

/* ── TOKENS ── */
:root {
  --ink:        #0d0c0a;
  --ink-soft:   #1e1c18;
  --ink-muted:  #3a3730;
  --paper:      #f5f0e8;
  --paper-warm: #ede7d9;
  --amber:      #d4830a;
  --amber-lt:   #f0a830;
  --amber-pale: #fdf3e0;
  --white:      #ffffff;
  --cream:      #faf7f2;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-serif:   'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  --r-sm:  8px;
  --r-md:  16px;
  --r-lg:  24px;
  --r-xl:  40px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --container: 1160px;
  --section-gap: 120px;
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a  { color: inherit; text-decoration: none; }
strong { font-weight: 600; }

/* ── CONTAINER ── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── TYPOGRAPHY HELPERS ── */
.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 20px;
  position: relative;
  padding-left: 28px;
}
.section-tag::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 2px;
  background: var(--amber);
}
.section-tag--light { color: var(--amber-lt); }
.section-tag--light::before { background: var(--amber-lt); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 14px 30px;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  white-space: nowrap;
}
.btn--primary {
  background: var(--amber);
  color: var(--white);
  border-color: var(--amber);
}
.btn--primary:hover {
  background: var(--amber-lt);
  border-color: var(--amber-lt);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,131,10,0.35);
}
.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}
.btn--outline {
  background: transparent;
  color: var(--amber);
  border-color: var(--amber);
}
.btn--outline:hover {
  background: var(--amber);
  color: var(--white);
  transform: translateY(-2px);
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.35s, box-shadow 0.35s;
}
.nav.scrolled {
  background: rgba(13,12,10,0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  max-width: var(--container);
  margin: 0 auto;
}
.nav__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: -0.01em;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav__links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.03em;
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--white); }
.nav__cta {
  background: var(--amber) !important;
  color: var(--white) !important;
  padding: 9px 20px;
  border-radius: 4px;
  font-weight: 600 !important;
  transition: background 0.2s, transform 0.2s !important;
}
.nav__cta:hover {
  background: var(--amber-lt) !important;
  transform: translateY(-1px);
}
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  transition: transform 0.3s;
}
.nav__mobile {
  display: none;
  flex-direction: column;
  background: rgba(13,12,10,0.97);
  padding: 16px 32px 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.nav__mobile a {
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color 0.2s;
}
.nav__mobile a:last-child { border-bottom: none; }
.nav__mobile a:hover { color: var(--amber-lt); }
.nav__mobile.open { display: flex; }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  background: var(--ink);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
}
.hero__blob--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #d4830a 0%, transparent 70%);
  top: -100px; right: -100px;
}
.hero__blob--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #8b5e0a 0%, transparent 70%);
  bottom: -50px; left: 5%;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero__text { max-width: 580px; }
.hero__eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 24px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 12px;
}
.hero__title em {
  font-style: italic;
  color: var(--amber-lt);
}
.hero__subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50px;
  padding: 10px 20px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.hero__badge strong { color: var(--white); font-weight: 600; }
.hero__book {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero__book-shadow {
  position: absolute;
  bottom: -30px;
  left: 50%; transform: translateX(-50%);
  width: 70%; height: 60px;
  background: radial-gradient(ellipse, rgba(212,131,10,0.4) 0%, transparent 70%);
  filter: blur(20px);
}
.hero__cover {
  width: 100%;
  max-width: 340px;
  border-radius: 8px;
  box-shadow:
    -8px 8px 40px rgba(0,0,0,0.6),
    0 0 0 1px rgba(255,255,255,0.08);
  transform: perspective(800px) rotateY(-8deg);
  transition: transform 0.5s var(--ease-out);
}
.hero__cover:hover {
  transform: perspective(800px) rotateY(-2deg) scale(1.02);
}
.hero__cover-fallback {
  display: none;
  width: 100%;
  max-width: 340px;
}
.cover-mock {
  background: linear-gradient(135deg, #1a1712 0%, #2d2820 100%);
  border: 2px solid var(--amber);
  border-radius: 8px;
  aspect-ratio: 2/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 40px 24px;
  box-shadow: -8px 8px 40px rgba(0,0,0,0.6);
}
.cover-mock__title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  text-align: center;
  line-height: 1.1;
}
.cover-mock__author {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--amber);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.3);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.4; }
  50% { transform: scaleY(1.3); opacity: 0.8; }
}

/* ── STORES ── */
.stores {
  background: var(--paper);
  padding: 52px 0;
  border-top: 3px solid var(--amber);
}
.stores__label {
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 28px;
  font-weight: 500;
}
.stores__grid {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ink);
  color: var(--white);
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  transition: background 0.25s, transform 0.25s;
  border: 2px solid var(--ink);
}
.store-btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.store-btn:hover {
  background: var(--amber);
  border-color: var(--amber);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212,131,10,0.3);
}
.store-btn--lg { padding: 16px 36px; font-size: 0.95rem; }

/* ── ABOUT BOOK ── */
.about-book {
  padding: var(--section-gap) 0;
  background: var(--cream);
}
.about-book__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-book__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.stat-card {
  background: var(--white);
  border-radius: var(--r-md);
  padding: 28px 32px;
  border-left: 4px solid var(--amber);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
}
.stat-card:hover {
  transform: translateX(6px);
  box-shadow: 0 8px 36px rgba(0,0,0,0.1);
}
.stat-card--1 { margin-left: 0; }
.stat-card--2 { margin-left: 32px; }
.stat-card--3 { margin-left: 16px; }
.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
  white-space: nowrap;
}
.stat-text {
  font-size: 0.875rem;
  color: var(--ink-muted);
  line-height: 1.5;
}
.about-book__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 28px;
}
.about-book__title em {
  font-style: italic;
  color: var(--amber);
}
.about-book__content p {
  font-size: 1rem;
  color: #4a4540;
  margin-bottom: 20px;
  line-height: 1.8;
}
.about-book__content .btn { margin-top: 12px; }

/* ── LEARN ── */
.learn {
  padding: var(--section-gap) 0;
  background: var(--ink);
}
.learn__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 64px;
}
.learn__title em { font-style: italic; color: var(--amber-lt); }
.learn__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.learn-card {
  background: rgba(255,255,255,0.03);
  padding: 40px 36px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: background 0.3s, transform 0.3s;
  position: relative;
  overflow: hidden;
}
.learn-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.learn-card:hover { background: rgba(255,255,255,0.055); }
.learn-card:hover::before { transform: scaleX(1); }
.learn-card__num {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 900;
  color: rgba(212,131,10,0.15);
  line-height: 1;
  margin-bottom: 16px;
  transition: color 0.3s;
}
.learn-card:hover .learn-card__num { color: rgba(212,131,10,0.3); }
.learn-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
  line-height: 1.3;
}
.learn-card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
}

/* ── PRAISE ── */
.praise {
  padding: var(--section-gap) 0;
  background: var(--ink-soft);
  position: relative;
  overflow: hidden;
}
.praise__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(212,131,10,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.praise__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
}
.praise__title em { font-style: italic; color: var(--amber-lt); }
.praise__track-wrap {
  overflow: hidden;
  /* no negative margin — clean clip boundary */
}
.praise__track {
  display: grid;
  /* 4 equal columns, each exactly 320px; track total = 4×320 + 3×24 = 1352px */
  grid-template-columns: repeat(4, 320px);
  gap: 24px;
  transition: transform 0.6s var(--ease-out);
  will-change: transform;
}
.praise-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background 0.3s;
}
.praise-card:hover { background: rgba(255,255,255,0.07); }
.praise-card__quote {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  color: var(--amber);
  line-height: 0.5;
  opacity: 0.7;
}
.praise-card p {
  font-size: 0.93rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.75;
  font-style: italic;
  flex: 1;
}
.praise-card__author {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.praise-card__author strong {
  color: var(--white);
  font-size: 0.9rem;
}
.praise-card__author span {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.4;
}
.praise__dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 40px;
}
.praise__dot {
  width: 10px; 
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  border: none;
}
.praise__dot:hover {
  background: rgba(255,255,255,0.5);
  transform: scale(1.15);
}
.praise__dot.active {
  background: var(--amber);
  transform: scale(1.35);
  box-shadow: 0 0 0 3px rgba(212,131,10,0.25);
}

/* ── AUTHOR ── */
.author {
  padding: var(--section-gap) 0;
  background: var(--cream);
}
.author__inner {
  display: grid;
  grid-template-columns: minmax(0, 360px) 1fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}
.author__portrait {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  width: 100%;
}
/* Fluid circle: fills its column, never exceeds 320px */
.author__portrait-frame {
  width: min(100%, 320px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  padding: clamp(4px, 1.2%, 8px);
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-lt) 100%);
  box-shadow:
    0 0 0 clamp(3px, 0.8%, 6px) rgba(212,131,10,0.15),
    0 16px 48px rgba(212,131,10,0.18);
  flex-shrink: 0;
}
.author__portrait-img {
  width: 100%; height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--paper-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.author__portrait-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.author__portrait-initials {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 900;
  color: var(--amber);
  background: var(--paper-warm);
}
.author__portrait-img img + .author__portrait-initials { display: none; }
.author__portrait-img.no-photo img { display: none; }
.author__portrait-img.no-photo .author__portrait-initials { display: flex; }
.author__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(100%, 320px);
}
.author__links a {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--amber);
  padding: 9px 16px;
  border: 1px solid rgba(212,131,10,0.3);
  border-radius: 4px;
  text-align: center;
  transition: background 0.2s, color 0.2s;
}
.author__links a:hover {
  background: var(--amber);
  color: var(--white);
}
.author__name {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 6px;
}
.author__role {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 600;
  margin-bottom: 28px;
}
.author__content p {
  font-size: 1rem;
  color: #4a4540;
  line-height: 1.8;
  margin-bottom: 18px;
}
.author__ventures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}
.venture-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  background: var(--paper-warm);
  border: 1px solid rgba(212,131,10,0.25);
  border-radius: 50px;
  color: var(--ink-muted);
  transition: background 0.2s, border-color 0.2s;
}
.venture-tag:hover {
  background: var(--amber-pale);
  border-color: var(--amber);
}

/* ── FINAL CTA ── */
.final-cta {
  padding: var(--section-gap) 0;
  background: var(--ink);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final-cta__bg {
  position: absolute; inset: 0;
  pointer-events: none;
}
.final-cta__blob {
  position: absolute;
  width: 700px; height: 400px;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(212,131,10,0.12) 0%, transparent 70%);
  filter: blur(40px);
}
.final-cta__eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
}
.final-cta__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  position: relative;
}
.final-cta__title em { font-style: italic; color: var(--amber-lt); }
.final-cta__desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.75;
  position: relative;
}
.final-cta__stores {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}

/* ── FOOTER ── */
.footer {
  background: #080807;
  padding: 56px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.footer__logo {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.footer__brand p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
  line-height: 1.6;
}
.footer__links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  align-items: flex-start;
}
.footer__links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}
.footer__links a:hover { color: var(--amber-lt); }
.footer__copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.2);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px;
}

/* ── ANIMATIONS ── */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__book { justify-content: center; }
  .hero__cover { max-width: 260px; transform: none; }
  .about-book__inner { grid-template-columns: 1fr; }
  .author__inner { grid-template-columns: 1fr; }
  .author__portrait {
    position: static;
    flex-direction: row;
    align-items: flex-start;
    gap: 32px;
    flex-wrap: wrap;
  }
  .author__portrait-frame { width: clamp(160px, 35vw, 260px); }
  .author__links       { width: clamp(160px, 35vw, 260px); }
  .learn__grid { grid-template-columns: repeat(2, 1fr); }
  .praise__track { grid-template-columns: repeat(4, 80vw); }
}

@media (max-width: 768px) {
  :root { --section-gap: 72px; }
  .nav__links { display: none; }
  .nav__burger { display: flex; }
  .hero { padding: 100px 0 60px; }
  .hero__title { font-size: 3.5rem; }
  .learn__grid { grid-template-columns: 1fr; }
  .about-book__inner { gap: 48px; }
  .author__inner { gap: 36px; }
  .author__portrait {
    flex-direction: column;
    align-items: center;
  }
  .author__portrait-frame { width: clamp(180px, 55vw, 260px); }
  .author__links       { width: clamp(180px, 55vw, 260px); }
  .stat-card--2, .stat-card--3 { margin-left: 0; }
  .stores__grid { flex-direction: column; align-items: center; }
  .final-cta__stores { flex-direction: column; align-items: center; }
  .praise__track { grid-template-columns: repeat(4, 90vw); }
  .footer__inner { flex-direction: column; gap: 24px; }
  .footer__links { flex-direction: column; gap: 12px; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 2.8rem; }
  .hero__actions { flex-direction: column; }
  .btn { justify-content: center; }
  .nav__inner { padding: 16px 20px; }
}