/* ── Web Fonts ── */
@font-face {
  font-family: 'Chronicle Text G3';
  src: url('./assets/fonts/ChronicleTextG3-Roman.otf') format('opentype');
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Sohne';
  src: url('./assets/fonts/Söhne-Leicht.otf') format('opentype');
  font-weight: 300;
  font-display: swap;
}

@font-face {
  font-family: 'Sohne';
  src: url('./assets/fonts/Söhne-Buch.otf') format('opentype');
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Sohne';
  src: url('./assets/fonts/Sohne-Kraftig.otf') format('opentype');
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans JP';
  src: url('./assets/fonts/Noto_Sans_JP_300.woff2') format('woff2');
  font-weight: 300;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans JP';
  src: url('./assets/fonts/Noto_Sans_JP_400.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Sans JP';
  src: url('./assets/fonts/Noto_Sans_JP_700.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: 'Sohne', 'Noto Sans JP', sans-serif;
  font-weight: 300;
  background: #FFF;
  color: #111;
}

/* ── Placeholder ── */
.ph {
  background: #F0F0F0;
  border: 1px dashed #CCC;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #AAA;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* ── Text skeleton ── */
.line {
  height: 10px;
  background: #DDD;
  border-radius: 2px;
}

.line-lg {
  height: 28px;
  background: #CCC;
  border-radius: 2px;
}

.line-xl {
  height: 40px;
  background: #BBB;
  border-radius: 2px;
}

/* ── Button ── */
.btn {
  display: inline-block;
  background: #333;
  color: #FFF;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.1em;
  padding: 13px 32px;
  border-radius: 9999px;
}

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: #555;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.1em;
  padding: 11px 28px;
  border: 1px solid #999;
  border-radius: 9999px;
}

section {
  position: relative;
}

/* ── Section title label ── */
.section-category {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

.dark-bg .section-category {
  color: rgba(255, 255, 255, 0.5);
}

.section-label {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #111;
  margin-bottom: 16px;
  display: block;
  font-family: 'Chronicle Text G3', 'Noto Sans JP', serif;
}

.dark-bg .section-label {
  color: #FFF;
}


/* ═══════════════════════════════════════
   NAV
═══════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: #F3F3F3;
  border-bottom: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 100;
}

.nav-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: #111;
  text-decoration: none;
  cursor: pointer;
}

.nav-btn {
  font-size: 14px;
  padding: 8px 20px;
}


/* ═══════════════════════════════════════
   01+02  HERO
═══════════════════════════════════════ */
.hero {
  min-height: 100vh;
  padding-top: 72px;
  background: #F3F3F3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-inner {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(240px, 374px) 1fr;
  align-items: center;
  gap: clamp(40px, 5vw, 80px);
  padding: 40px clamp(40px, 5vw, 64px) 40px clamp(60px, 11vw, 160px);
}

.hero-book {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* ── Book Mockup ── */
.book-mockup {
  position: relative;
  box-shadow:
    0 4px 8px rgba(0,0,0,0.12),
    0 12px 28px rgba(0,0,0,0.18),
    0 28px 64px rgba(0,0,0,0.10);
}

.book-cover {
  width: 100%;
  position: relative;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    inset -1px 0 0 rgba(255,255,255,0.06);
}

.book-cover img {
  width: 100%;
  height: auto;
  display: block;
}

/* Hardcover binding groove + highlight */
.book-cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 18px;
  background: linear-gradient(to right,
    rgba(0,0,0,0.08) 0px,
    rgba(255,255,255,0.5) 2px,
    rgba(0,0,0,0.18) 3.5px,
    rgba(0,0,0,0.08) 5px,
    rgba(255,255,255,0.25) 6px,
    rgba(0,0,0,0.03) 8px,
    transparent 18px
  );
  pointer-events: none;
  z-index: 1;
}

/* Scroll-linked gloss highlight — broad soft sheen + tight specular */
.book-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      115deg,
      rgba(255,255,255,0) 0%,
      rgba(255,255,255,0.04) 35%,
      rgba(255,255,255,0.22) 48%,
      rgba(255,255,255,0.35) 50%,
      rgba(255,255,255,0.22) 52%,
      rgba(255,255,255,0.04) 65%,
      rgba(255,255,255,0) 100%
    ),
    linear-gradient(
      140deg,
      rgba(255,255,255,0) 0%,
      rgba(255,255,255,0.06) 60%,
      rgba(255,255,255,0.10) 75%,
      rgba(255,255,255,0) 100%
    );
  background-size: 200% 200%, 100% 200%;
  background-position: 50% var(--gloss-y, 30%), 0% var(--gloss-y, 30%);
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 3;
}

/* Matte paper texture (SVG noise) */
.book-texture {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.10;
  mix-blend-mode: multiply;
  pointer-events: none;
  background: rgba(0,0,0,0.5);
  filter: url(#book-noise);
}

.book-spine {
  position: absolute;
  right: 100%;
  top: 0;
  height: 100%;
  width: 0;
  background: #888;
  border-radius: 2px 0 0 2px;
}

.book-pages {
  position: absolute;
  left: 100%;
  top: 3px;
  height: calc(100% - 6px);
  width: 5px;
  background: linear-gradient(to right, #E8E5E0, #F0EDE8);
  border-right: 1px solid #DDD;
  border-radius: 0 1px 1px 0;
  box-shadow: inset -1px 0 2px rgba(0,0,0,0.04);
}

.hero-carousel {
  display: flex;
  align-items: center;
  gap: 24px;
}

.carousel-arrow {
  font-size: 28px;
  color: #AAA;
  flex-shrink: 0;
  line-height: 1;
  cursor: pointer;
}

.carousel-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 4px;
}

.carousel-dot {
  width: 6px;
  height: 6px;
  background: #CCC;
  border-radius: 50%;
}

.carousel-dot.active {
  background: #888;
}

.hero-quote {
  text-align: left;
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.hero-quote-mark {
  width: 48px;
  height: auto;
  flex-shrink: 0;
}

.hero-quote-body {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero-quote-text {
  font-size: clamp(22px, 2.4vw, 34px);
  font-weight: 700;
  color: #111;
  line-height: 1.7;
  letter-spacing: 0.04em;
  font-family: 'Noto Serif JP', serif;
  white-space: nowrap;
  margin-top: -0.35em;
}

.hero-quote-credit {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hero-quote-line {
  width: 48px;
  height: 1px;
  background: #111;
  flex-shrink: 0;
}

.hero-quote-name {
  font-size: 19px;
  font-weight: 700;
  color: #111;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.hero-quote-title {
  font-size: 14px;
  color: #555;
  letter-spacing: 0.04em;
}

.hero-endorsements {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 24px 40px;
}

.endorse-person {
  display: flex;
  align-items: center;
  gap: 8px;
}

.endorse-avatar {
  width: 24px;
  height: 24px;
  background: #CCC;
  border-radius: 50%;
  flex-shrink: 0;
}

.endorse-name {
  font-size: 11px;
  font-weight: 600;
  color: #777;
}

.endorse-role {
  font-size: 10px;
  color: #AAA;
}

.endorse-sep {
  width: 1px;
  height: 20px;
  background: #CCC;
}

.hero-bottom {
  width: 100%;
}

.hero-cta-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: fit-content;
}

.hero-cta-wrap .btn {
  background: #E8432A;
  color: #FFF;
  padding: 12px 36px;
  font-size: 15px;
  transition: opacity 0.2s;
}

.hero-cta-wrap .btn:hover {
  opacity: 0.75;
}

.hero-date {
  font-size: 11px;
  color: #111;
  letter-spacing: 0.06em;
}


/* ═══════════════════════════════════════
   03  INTRODUCTION
═══════════════════════════════════════ */
.introduction {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
  background: #2A2A2A;
}

.intro-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* Scrim overlay — gradient darkens toward text side */
.introduction::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(to right, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.55) 60%, rgba(0,0,0,0.7) 100%),
    linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 40%);
  pointer-events: none;
}

.intro-inner {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding: 100px 80px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 40px;
}

.intro-main-message {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: #FFF;
  letter-spacing: 0.04em;
  line-height: 1.3;
  white-space: nowrap;
}

.intro-line {
  display: inline;
}

.intro-sub {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 560px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  line-height: 1.9;
}

.intro-sub p {
  margin: 0;
}

.intro-author-credit {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.08em;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}


/* ═══════════════════════════════════════
   05  TOOLKIT
═══════════════════════════════════════ */
.toolkit {
  padding: 100px 64px;
  background: #FFF;
  color: #111;
  position: relative;
  overflow: hidden;
}

.toolkit-worksheet-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 1;
  pointer-events: none;
  z-index: 0;
}

.toolkit-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.toolkit-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.toolkit-flywheel {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
}

.flywheel-base {
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 4px 24px rgba(0,0,0,0.15));
}

.flywheel-arrow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.toolkit-right {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.toolkit-heading {
  display: flex;
  flex-direction: column;
}

.toolkit-subtitle {
  font-size: 19px;
  color: #111;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-top: -12px;
}

.toolkit-desc {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #444;
  font-size: 15px;
  line-height: 1.9;
}

.toolkit-desc p {
  margin: 0;
}


/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
}

.lightbox.is-open {
  display: flex;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 36px;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.lightbox-close:hover {
  color: #FFF;
}

.lightbox-content {
  max-width: 720px;
  width: 90%;
}

.lightbox-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #F5F5F5;
  border-color: #DDD;
  color: #999;
  font-size: 14px;
}

.toolkit-privacy-notice {
  font-size: 12px;
  color: #777;
  line-height: 1.7;
  margin-top: 16px;
}

.toolkit-privacy-notice a {
  color: #E8432A;
  text-decoration: underline;
}

.toolkit-cta {
  text-align: left;
  margin-top: 24px;
}

.toolkit .btn {
  background: #111;
  color: #FFF;
}

/* ── Toolkit Form (dark) ── */
.toolkit-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.toolkit-form-fields {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.toolkit-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.toolkit-form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toolkit-form-label {
  font-size: 14px;
  font-weight: 400;
  color: #111;
  letter-spacing: 0.04em;
}

.toolkit-form-input {
  height: 44px;
  background: #FFF;
  border: 1px solid #D0D0D0;
  border-radius: 6px;
  padding: 0 14px;
  font-family: inherit;
  font-size: 14px;
  color: #111;
  width: 100%;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.toolkit-form-input:focus {
  border-color: #E8432A;
  box-shadow: 0 0 0 2px rgba(232, 67, 42, 0.15);
}

.toolkit-form-input::placeholder {
  color: #BBB;
}

.toolkit-form-select {
  appearance: auto;
  cursor: pointer;
}

.toolkit-form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 12px;
}

.toolkit-checkbox-box {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  accent-color: #E8432A;
}

.toolkit-checkbox-label {
  font-size: 14px;
  color: #111;
  line-height: 1.5;
}

/* ── Toolkit Form States ── */
.toolkit-required {
  color: #E8432A;
  font-weight: 400;
}

.toolkit-form-input.is-error {
  border: 1.5px solid #E8432A;
  background: #FFF5F4;
}

.toolkit-error {
  display: none;
  background: #FFF5F4;
  border: 1px solid #E8432A;
  border-radius: 6px;
  padding: 12px 16px;
  font-size: 13px;
  color: #C0392B;
  line-height: 1.6;
  margin-top: -8px;
}

.toolkit .btn.is-disabled {
  background: #CCC;
  color: #999;
  cursor: not-allowed;
  pointer-events: none;
}

.toolkit .btn.is-loading {
  opacity: 0.6;
  cursor: wait;
}

/* ── Toolkit Success ── */
.toolkit-success {
  display: none;
  text-align: center;
}

.toolkit-success.is-visible {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.toolkit-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #111;
  color: #FFF;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toolkit-success-title {
  font-size: 22px;
  font-weight: 600;
  color: #111;
  letter-spacing: 0.04em;
}

.toolkit-success-desc {
  font-size: 15px;
  color: #555;
  line-height: 1.8;
}

.toolkit-success-notice {
  font-size: 14px;
  color: #777;
  margin-top: 8px;
  line-height: 1.7;
}

.toolkit-success-notice a {
  color: #333;
  text-decoration: underline;
}

.toolkit-success-notice a:hover {
  color: #E8432A;
}

/* ── Toolkit Download (dark) ── */
.toolkit-download {
  display: none;
}

.toolkit-download.is-visible {
  display: block;
}

.toolkit-download-cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toolkit-download-card {
  background: #F9F9F9;
  border: 1px solid #DDD;
  border-radius: 8px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.toolkit-download-icon {
  width: 40px;
  height: 40px;
  background: #EEE;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
  color: #777;
  letter-spacing: 0.05em;
}

.toolkit-download-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toolkit-download-name {
  font-size: 14px;
  font-weight: 400;
  color: #111;
}

.toolkit-download-meta {
  font-size: 12px;
  color: #999;
}

.toolkit-download-btn {
  color: #555;
  border-color: #CCC;
  font-size: 12px;
  padding: 8px 20px;
}

.toolkit-download-notice {
  font-size: 14px;
  color: #777;
  margin-top: 12px;
  line-height: 1.7;
}

.toolkit-download-notice a {
  color: #333;
  text-decoration: underline;
  transition: color 0.2s;
}

.toolkit-download-notice a:hover {
  color: #E8432A;
}


/* ═══════════════════════════════════════
   04  PODCAST
═══════════════════════════════════════ */
.deepdive {
  background: #111;
  color: #FFF;
  padding: 100px 64px 80px;
  position: relative;
  overflow: visible;
}

/* Waveform background — positioned by JS to align with episode-list */
.waveform-bg {
  position: absolute;
  left: 0;
  width: 100%;
  height: 700px;
  opacity: 0.32;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.deepdive-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.deepdive-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 28px;
}

.deepdive-heading {
  display: flex;
  flex-direction: column;
}

.deepdive-subtitle {
  font-size: 19px;
  color: #FFF;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-top: -12px;
}

.deepdive-desc {
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  line-height: 1.9;
}

.deepdive-desc p {
  margin: 0;
}

.deepdive-platforms {
  display: flex;
  gap: 16px;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: #FFF;
  border: 1px solid #FFF;
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.platform-badge img {
  height: 20px;
  width: auto;
  display: block;
}

.platform-badge:hover {
  border-color: #888;
  box-shadow: 0 2px 8px rgba(255,255,255,0.08);
}

.episode-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.deepdive-phone {
  position: relative;
  align-self: end;
  margin-bottom: -80px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 2;
}

.deepdive-phone img {
  max-width: 100%;
  max-height: 640px;
  object-fit: contain;
  display: block;
}


/* ═══════════════════════════════════════
   06  ABOUT THE AUTHOR
═══════════════════════════════════════ */
.about-author {
  padding: 120px 64px;
  background: #E8E8E8;
  color: #111;
}

.about-author-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-left {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.about-name {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.about-name .line-lg {
  width: 180px;
}

.about-name .line {
  width: 140px;
}

.about-bio {
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: rgba(0, 0, 0, 0.65);
  font-size: 15px;
  line-height: 1.9;
}

.about-bio p {
  margin: 0;
}

.about-cta {
  align-self: flex-start;
  background: #333;
  color: #FFF;
  border: none;
  padding: 13px 32px;
  transition: background 0.2s;
}

.about-cta:hover {
  background: #E8432A;
}

.about-photo {
  width: 65%;
  aspect-ratio: 4 / 5;
  margin-left: 8%;
  background: url('assets/images/rei-inamoto-portrait-smile-SM.jpg') no-repeat center center / cover;
  border: 1px solid #CCC;
}


/* ── Body text: orphan prevention ── */
.intro-sub p,
.deepdive-desc p,
.toolkit-desc p,
.about-bio p {
  text-wrap: pretty;
}


/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
.footer {
  background: #1A1A1A;
  position: relative;
}

.footer-screenshot {
  width: 100%;
  display: block;
}

/* ── Hamburger (hidden on desktop) ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.nav-hamburger span {
  width: 20px;
  height: 2px;
  background: #111;
  border-radius: 1px;
}


/* ═══════════════════════════════════════
   TABLET — max-width: 768px
═══════════════════════════════════════ */
@media (max-width: 768px) {

  /* Nav */
  .nav {
    padding: 0 24px;
    height: 60px;
  }
  .nav-right {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }

  /* Section label */
  .section-label {
    font-size: 40px;
  }

  /* Hero */
  .hero {
    padding-top: 60px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 32px;
  }
  .hero-book {
    justify-content: center;
  }
  .book-cover {
    width: 234px;
  }
  .hero-content {
    align-items: center;
  }
  .hero-quote {
    text-align: center;
    align-items: flex-start;
    justify-content: center;
  }
  .hero-quote-mark {
    width: 32px;
  }
  .hero-quote-text {
    font-size: 18px;
    text-wrap: balance;
  }
  .hero-quote-credit {
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero-bottom {
    display: flex;
    justify-content: center;
  }
  .hero-cta-wrap {
    align-items: center;
  }
  .hero-carousel {
    padding: 0 24px;
  }

  /* Introduction */
  .introduction {
    min-height: 440px;
  }
  .intro-inner {
    padding: 64px 40px;
    gap: 28px;
    align-items: flex-start;
    text-align: left;
  }
  .intro-main-message {
    white-space: normal;
    font-size: 28px;
  }
  .intro-line {
    display: block;
  }
  .intro-sub br {
    display: none;
  }

  /* Toolkit */
  .toolkit {
    padding: 72px 32px;
  }
  .toolkit-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .toolkit-flywheel {
    max-width: 320px;
    margin: 0 auto;
  }

  /* Deep Dive */
  .deepdive {
    padding: 72px 32px 60px;
  }
  .deepdive-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .deepdive-left {
    align-items: flex-start;
  }
  .deepdive-desc {
    text-align: left;
    max-width: 480px;
  }
  .deepdive-platforms {
    justify-content: center;
  }
  .deepdive {
    padding-bottom: 0;
  }
  .deepdive-phone {
    margin-bottom: 0;
  }
  .deepdive-phone img {
    max-height: 480px;
  }

  /* About the Author */
  .about-author {
    padding: 80px 32px;
  }
  .about-author-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .about-left {
    display: contents;
  }
  .about-name { order: 1; }
  .about-bio { order: 2; }
  .about-photo {
    order: 3;
    width: 100%;
    margin-left: 0;
  }
  .toolkit-cta {
    text-align: center;
  }
  .about-cta {
    order: 4;
    justify-self: center;
  }

}


/* ═══════════════════════════════════════
   MOBILE — max-width: 480px
═══════════════════════════════════════ */
@media (max-width: 480px) {

  /* Section label */
  .section-label {
    font-size: 32px;
  }

  /* Hero */
  .hero-inner {
    padding: 36px 20px;
    gap: 24px;
  }
  .book-cover {
    width: 180px;
  }
  .hero-quote-text {
    font-size: 16px;
  }
  .hero-carousel {
    gap: 16px;
    padding: 0;
  }

  /* Introduction */
  .introduction {
    min-height: 360px;
    justify-content: center;
  }
  .intro-inner {
    padding: 48px 24px;
    align-items: flex-start;
    text-align: left;
    gap: 24px;
  }
  .intro-main-message {
    text-align: center;
    align-self: center;
    width: 100%;
  }
  .intro-sub {
    align-items: flex-start;
  }
  .intro-author-credit {
    text-align: center;
    align-self: center;
  }

  /* Toolkit */
  .toolkit {
    padding: 56px 20px;
  }
  .toolkit-inner {
    gap: 36px;
  }
  .toolkit-flywheel {
    max-width: 240px;
  }
  .toolkit-form-row {
    grid-template-columns: 1fr;
  }

  /* Deep Dive */
  .deepdive {
    padding: 56px 20px 48px;
  }
  .deepdive-inner {
    gap: 32px;
  }
  .deepdive-phone img {
    max-height: 400px;
  }
  .deepdive-platforms {
    flex-direction: column;
    align-items: center;
  }

  /* About the Author */
  .about-author {
    padding: 56px 20px;
  }
  .about-author-inner {
    gap: 20px;
  }
  .about-photo {
    width: 100%;
  }

}