/* ============================================
   シン・ビジネス、自己啓発読書会 LP
   Design: Clean, minimal, generous whitespace
   Reference: surpriselife.co
   Fonts: Noto Sans JP + Inter
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --color-white: #ffffff;
  --color-cream: #f8f9fb;
  --color-warm-gray: #f0f2f5;
  --color-sand: #c8d8e8;
  --color-brown: #3b6b9e;
  --color-brown-dark: #2d5580;
  --color-brown-deep: #1e3a5f;
  --color-text: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #808080;
  --color-border: #d0d5dd;
  --color-border-light: #e8eaed;

  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  --font-display: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;

  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.625rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;

  --leading-tight: 1.5;
  --leading-normal: 1.85;
  --leading-relaxed: 2.0;

  --tracking-tight: 0.02em;
  --tracking-normal: 0.04em;
  --tracking-wide: 0.08em;
  --tracking-wider: 0.12em;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --header-height: 72px;
  --max-w: 720px;
  --max-w-wide: 1080px;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --radius-full: 100px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.05);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.07);
  --shadow-xl: 0 16px 56px rgba(0,0,0,0.09);
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  padding-top: var(--header-height);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-brown); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-brown-dark); }
ul, ol { list-style: none; }

/* ---------- Utilities ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-6); }
.container--wide { max-width: var(--max-w-wide); margin: 0 auto; padding: 0 var(--space-6); }

/* ---------- Section ---------- */
.section { padding: var(--space-12) 0; }

.section__title {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  text-align: left;
  margin-bottom: var(--space-8);
  color: var(--color-text);
  letter-spacing: var(--tracking-wide);
}

.section__title::after { display: none; }

/* ---------- Section Image ---------- */
.section__image-wrapper {
  max-width: 640px;
  margin: 0 0 var(--space-8);
  text-align: left;
}
.section__image {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.cta-bottom .section__image-wrapper { max-width: 480px; margin: 0 0 var(--space-6); text-align: left; }
.cta-bottom .section__image { border-radius: var(--radius-lg); box-shadow: var(--shadow-xl); }

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

.fade-in-stagger > * {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.fade-in-stagger.is-visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(5) { transition-delay: 0.32s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(6) { transition-delay: 0.40s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(7) { transition-delay: 0.48s; opacity: 1; transform: none; }
.fade-in-stagger.is-visible > *:nth-child(8) { transition-delay: 0.56s; opacity: 1; transform: none; }

/* ---------- Button ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px;
  font-family: var(--font-sans); font-size: var(--text-sm); font-weight: 600;
  line-height: 1.4; border: none; border-radius: var(--radius-full); cursor: pointer;
  transition: all 0.3s var(--ease); text-decoration: none; white-space: nowrap;
  letter-spacing: var(--tracking-normal);
}
.btn:hover { text-decoration: none; }
.btn:focus-visible { outline: 3px solid var(--color-sand); outline-offset: 2px; }

.btn--primary {
  background: var(--color-brown-deep);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--color-text);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn--primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

/* ---------- Card ---------- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  padding: var(--space-10);
  box-shadow: var(--shadow-sm);
}

.card-grid { display: grid; gap: var(--space-6); }

/* ---------- Icon ---------- */
.icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--color-warm-gray); flex-shrink: 0;
}
.icon svg {
  width: 24px; height: 24px;
  stroke: var(--color-brown); fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: var(--header-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max-w-wide); margin: 0 auto;
  padding: 0 var(--space-8);
}
.header__logo {
  display: flex; align-items: center; gap: 10px;
  font-size: var(--text-sm); font-weight: 600; color: var(--color-text);
  text-decoration: none; transition: opacity 0.2s;
  letter-spacing: var(--tracking-tight);
}
.header__logo:hover { opacity: 0.6; color: var(--color-text); text-decoration: none; }
.header__logo-img { width: 36px; height: 36px; border-radius: 10px; object-fit: cover; flex-shrink: 0; }
.header__logo-text { white-space: pre-line; line-height: 1.3; }

.nav__list { display: flex; align-items: center; gap: 2px; }
.nav__item { display: block; }
.nav__link {
  display: block; padding: 6px 10px;
  font-size: var(--text-xs); font-weight: 500; color: var(--color-text-muted);
  border-radius: 6px; transition: color 0.2s, background 0.2s; white-space: nowrap;
  text-decoration: none; letter-spacing: var(--tracking-tight);
}
.nav__link:hover { color: var(--color-text); background: var(--color-warm-gray); text-decoration: none; }

.nav__toggle {
  display: none; flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; width: 44px; height: 44px; background: none; border: none; cursor: pointer;
  -webkit-tap-highlight-color: transparent; padding: 0;
}
.nav__toggle span {
  display: block; width: 18px; height: 1.5px; background: var(--color-text);
  border-radius: 1px; transition: transform 0.3s, opacity 0.3s;
}
.nav__toggle.is-active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.is-active span:nth-child(2) { opacity: 0; }
.nav__toggle.is-active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================
   HERO — editorial 2-column
   ============================================ */
.hero {
  background: var(--color-white);
  padding: var(--space-8) 0 var(--space-12);
  display: flex; align-items: center;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}
.hero__text { max-width: 520px; }
.hero__headline {
  font-family: var(--font-sans);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.55;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  white-space: pre-line;
  letter-spacing: var(--tracking-wide);
}
.hero__subheadline {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-normal);
  white-space: pre-line;
}
.hero__badges {
  display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-8);
}
.hero__badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px;
  font-size: var(--text-xs); font-weight: 500; color: var(--color-brown);
  background: var(--color-cream); border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full); letter-spacing: var(--tracking-tight);
}
.hero__badge .badge-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--color-brown);
}
.hero__cta { font-size: var(--text-base); padding: 16px 40px; }

.hero__visual {
  display: flex; justify-content: center; align-items: center;
  position: relative;
}
.hero__logo-img {
  width: 300px; height: 300px; object-fit: contain;
  filter: drop-shadow(0 12px 40px rgba(0,0,0,0.08));
  animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero__image {
  width: 100%; max-width: 480px; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   INTRO
   ============================================ */
.intro { background: var(--color-cream); }
.intro__body {
  max-width: none; margin: 0; text-align: left;
  color: var(--color-text-secondary);
  font-size: var(--text-base); line-height: var(--leading-relaxed);
  white-space: pre-line;
  letter-spacing: var(--tracking-normal);
}

/* ============================================
   RECOMMENDED — horizontal cards
   ============================================ */
.recommended { background: var(--color-white); }
.recommended__list { grid-template-columns: 1fr; gap: var(--space-4); }
.recommended__item {
  display: flex; align-items: center; gap: var(--space-5);
  background: var(--color-cream); border: none; border-radius: var(--radius);
  padding: var(--space-5) var(--space-6);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.recommended__item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.recommended__text {
  font-size: var(--text-base); font-weight: 500; color: var(--color-text);
  letter-spacing: var(--tracking-normal);
}

/* ============================================
   REASSURANCE — 3-column cards
   ============================================ */
.reassurance { background: var(--color-cream); }
.reassurance__list {
  grid-template-columns: 1fr; gap: var(--space-5);
}
.reassurance__item {
  display: flex; flex-direction: row; align-items: flex-start; text-align: left;
  background: var(--color-white); border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.reassurance__item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.reassurance__item .icon {
  width: 56px; height: 56px; margin-right: var(--space-4); margin-bottom: 0;
  background: var(--color-cream); flex-shrink: 0;
}
.reassurance__item .icon svg { width: 28px; height: 28px; }
.reassurance__item-content { flex: 1; }
.reassurance__item-title {
  font-family: var(--font-sans); font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-3);
  letter-spacing: var(--tracking-normal);
}
.reassurance__item-body {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); white-space: pre-line;
  letter-spacing: var(--tracking-normal);
}
.reassurance__stat { display: block; font-family: var(--font-en); font-size: var(--text-2xl); font-weight: 700; color: var(--color-brown); margin-top: var(--space-4); }
.reassurance__stat-label { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ============================================
   GROWTH — numbered list
   ============================================ */
.growth { background: var(--color-white); }
.growth__list { grid-template-columns: 1fr; gap: 0; max-width: 720px; margin: 0; }
.growth__item {
  display: grid; grid-template-columns: 48px 1fr; gap: var(--space-5);
  align-items: start;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border-light);
}
.growth__item:last-child { border-bottom: none; }
.growth__number {
  display: flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-brown-deep); color: var(--color-white);
  font-family: var(--font-en); font-size: var(--text-lg); font-weight: 600;
}
.growth__item-content { padding-top: var(--space-1); }
.growth__item-title {
  font-family: var(--font-sans); font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-normal);
}
.growth__item-body {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); white-space: pre-line;
  letter-spacing: var(--tracking-normal);
}

/* ============================================
   FLOW — timeline
   ============================================ */
.flow { background: var(--color-cream); }
.flow__image-wrapper { margin-bottom: var(--space-6); text-align: left; }
.flow__image-wrapper img { max-width: 100%; border-radius: var(--radius); }
.flow__steps { position: relative; max-width: 640px; margin: 0; }
.flow__step {
  display: flex; gap: var(--space-6); align-items: flex-start;
  padding-bottom: var(--space-6); position: relative;
}
.flow__step:last-child { padding-bottom: 0; }
.flow__step::before {
  content: ""; position: absolute; left: 23px; top: 48px; bottom: 0;
  width: 1px; background: var(--color-border);
}
.flow__step:last-child::before { display: none; }
.flow__step-number {
  display: flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-brown-deep); color: var(--color-white);
  font-family: var(--font-en); font-size: var(--text-base); font-weight: 600;
  flex-shrink: 0; position: relative; z-index: 1;
}
.flow__step-content { flex: 1; padding-top: var(--space-2); }
.flow__step-title {
  font-family: var(--font-sans); font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: 4px;
  letter-spacing: var(--tracking-normal);
}
.flow__step-desc {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); white-space: pre-line;
  letter-spacing: var(--tracking-normal);
}
.flow__note {
  margin-top: var(--space-6);
  padding: var(--space-5) var(--space-6);
  background: var(--color-white); border-radius: var(--radius-sm);
  font-size: var(--text-sm); color: var(--color-text-muted);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  max-width: 640px; margin-left: 0; margin-right: 0;
  border: 1px solid var(--color-border-light);
}

/* ============================================
   BOOK RULES
   ============================================ */
.book-rules { background: var(--color-white); }
.book-rules__lead {
  text-align: left; color: var(--color-text-secondary);
  font-size: var(--text-sm); line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  max-width: none; margin: 0 0 var(--space-8); white-space: pre-line;
}
.book-rules__content { display: grid; gap: var(--space-6); }
.book-rules__block { padding: var(--space-8); }
.book-rules__block-title {
  display: flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-sans); font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-normal);
}
.book-rules__text {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); letter-spacing: var(--tracking-normal);
}
.book-rules__genre-group { margin-bottom: var(--space-4); }
.book-rules__genre-group:last-of-type { margin-bottom: var(--space-3); }
.book-rules__genre-label {
  display: inline-block; font-size: var(--text-xs); font-weight: 600;
  padding: 3px 10px; border-radius: 6px; margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-tight);
}
.book-rules__genre-label--ok { background: #e8f5e9; color: #2e7d32; }
.book-rules__genre-label--ng { background: #fbe9e7; color: #c62828; }
.book-rules__genre-list { padding-left: var(--space-2); }
.book-rules__genre-item {
  display: flex; align-items: flex-start; gap: var(--space-2);
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); margin-bottom: 4px;
  letter-spacing: var(--tracking-normal);
}
.book-rules__genre-item--ok .icon svg { stroke: #43a047; }
.book-rules__genre-item--ng .icon svg { stroke: #e53935; }
.book-rules__exception {
  display: flex; align-items: flex-start; gap: var(--space-2);
  margin-top: var(--space-4); padding: var(--space-4) var(--space-6);
  background: var(--color-cream); border-radius: var(--radius-sm);
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); border: 1px solid var(--color-border-light);
  letter-spacing: var(--tracking-normal);
}
.book-rules__exception .icon svg { stroke: var(--color-brown); }
.book-rules__def { margin-bottom: var(--space-4); }
.book-rules__def:last-child { margin-bottom: 0; }
.book-rules__def-title {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-brown);
  margin-bottom: 4px; letter-spacing: var(--tracking-normal);
}
.book-rules__examples { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.book-rules__example-col { min-width: 0; }
.book-rules__example-heading {
  font-size: var(--text-sm); font-weight: 600; padding: 4px 10px;
  border-radius: 6px; display: inline-block; margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-tight);
}
.book-rules__example-heading--ok { background: #e8f5e9; color: #2e7d32; }
.book-rules__example-heading--ng { background: #fbe9e7; color: #c62828; }
.book-rules__example-list { padding-left: var(--space-3); }
.book-rules__example-list li {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); margin-bottom: 4px;
  position: relative; padding-left: var(--space-4);
  letter-spacing: var(--tracking-normal);
}
.book-rules__example-list li::before { content: "\2022"; position: absolute; left: 0; color: var(--color-text-muted); }
.book-rules__note-ref {
  text-align: left; margin-top: var(--space-6);
  font-size: var(--text-base); color: var(--color-text);
  font-weight: 500; letter-spacing: var(--tracking-normal);
}
.book-rules__note-ref a {
  color: var(--color-brown); font-weight: 700;
  text-decoration: underline; text-underline-offset: 3px;
}
.book-rules__note-ref a:hover { color: var(--color-brown-dark); }

.icon--sm { width: 32px; height: 32px; }
.icon--sm svg { width: 16px; height: 16px; }
.icon--xs { width: 20px; height: 20px; background: transparent; flex-shrink: 0; }
.icon--xs svg { width: 16px; height: 16px; }

/* ============================================
   RULES
   ============================================ */
.rules { background: var(--color-cream); }
.rules__subtitle {
  font-family: var(--font-sans); font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-normal);
}
.rules__list { margin-bottom: var(--space-5); }
.rules__list li {
  position: relative; padding-left: var(--space-6); margin-bottom: var(--space-3);
  font-size: var(--text-sm); color: var(--color-text-secondary); line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
}
.rules__list li::before {
  content: ""; position: absolute; left: 2px; top: 10px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--color-brown);
}
.rules__note-item {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  line-height: var(--leading-normal); margin-bottom: var(--space-3);
  padding-left: var(--space-6); position: relative; white-space: pre-line;
  letter-spacing: var(--tracking-normal);
}
.rules__note-item::before { content: "\2015"; position: absolute; left: 0; color: var(--color-text-muted); }

/* ============================================
   BASICS
   ============================================ */
.basics { background: var(--color-white); }
.basics__card { max-width: 640px; margin: 0; }
.basics__dl { display: grid; grid-template-columns: auto 1fr; gap: 0; }
.basics__dt {
  padding: var(--space-4) var(--space-8) var(--space-4) 0;
  font-weight: 600; font-size: var(--text-sm); color: var(--color-brown);
  border-bottom: 1px solid var(--color-border-light); white-space: nowrap;
  letter-spacing: var(--tracking-normal);
}
.basics__dd {
  padding: var(--space-4) 0; font-size: var(--text-sm); color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
  letter-spacing: var(--tracking-normal); white-space: pre-line;
}
.basics__dd-note { display: block; font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 4px; white-space: pre-line; }
.basics__dl > :nth-last-child(-n+2) { border-bottom: none; }
.schedule__note {
  text-align: left; font-size: var(--text-sm); color: var(--color-text-muted);
  margin-top: var(--space-5); margin-bottom: var(--space-6);
  letter-spacing: var(--tracking-normal);
}
.schedule__cta-wrap { text-align: left; }

/* ============================================
   FAQ — clean accordion
   ============================================ */
.faq { background: var(--color-cream); }
.faq__list { max-width: 100%; }
.faq__item {
  border: 1px solid var(--color-border-light); border-radius: var(--radius);
  margin-bottom: var(--space-4); background: var(--color-white);
  overflow: hidden; transition: box-shadow 0.3s;
}
.faq__item:hover { box-shadow: var(--shadow-md); }
.faq__item summary {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base); font-weight: 500; color: var(--color-text);
  cursor: pointer; list-style: none; transition: background 0.2s;
  letter-spacing: var(--tracking-normal);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::before {
  content: ""; display: inline-block; width: 24px; height: 24px; min-width: 24px;
  border-radius: 50%; background: var(--color-warm-gray);
}
.faq__item summary::after {
  content: ""; margin-left: auto; width: 7px; height: 7px;
  border-right: 1.5px solid var(--color-text-muted);
  border-bottom: 1.5px solid var(--color-text-muted);
  transform: rotate(45deg); transition: transform 0.3s var(--ease); flex-shrink: 0;
}
.faq__item[open] summary::after { transform: rotate(-135deg); }
.faq__item summary:hover { background: var(--color-cream); }
.faq__item summary:focus-visible { outline: 3px solid var(--color-sand); outline-offset: -3px; }
.faq__answer {
  padding: 0 var(--space-6) var(--space-6);
  padding-left: calc(var(--space-6) + 24px + var(--space-4));
  font-size: var(--text-sm); color: var(--color-text-secondary); line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
}
.faq__answer a { color: var(--color-brown); text-decoration: underline; text-underline-offset: 3px; }
.faq__answer a:hover { color: var(--color-brown-dark); }

/* ============================================
   SNS
   ============================================ */
.sns { background: var(--color-white); text-align: left; }
.sns__body {
  font-size: var(--text-sm); color: var(--color-text-secondary);
  margin-bottom: var(--space-6); line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-normal);
}
.sns__list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-4); max-width: 640px; margin: 0; }
.sns__item {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-cream); border: 1px solid var(--color-border-light);
  border-radius: var(--radius); text-decoration: none; color: var(--color-text);
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
}
.sns__item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--color-border); text-decoration: none; }
.sns__item-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; flex-shrink: 0; }
.sns__item-icon svg { width: 24px; height: 24px; }
.sns__item-icon .sns__brand-img { width: 28px; height: 28px; object-fit: contain; border-radius: 6px; }
.sns__item-content { display: flex; flex-direction: column; text-align: left; min-width: 0; }
.sns__item-label { font-size: var(--text-sm); color: var(--color-text); font-weight: 600; letter-spacing: var(--tracking-tight); }
.sns__item-text { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 400; }

/* ============================================
   CTA BOTTOM — full-width band
   ============================================ */
.cta-bottom {
  background: var(--color-brown-deep); text-align: left;
  padding: var(--space-12) 0; color: var(--color-white);
}
.cta-bottom .section__title { color: var(--color-white); }
.cta-bottom .section__title::after { display: none; }
.cta-bottom__body {
  font-size: var(--text-base); color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-8); line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
}
.cta-bottom .btn--primary {
  background: var(--color-white); color: var(--color-brown-deep);
  font-size: var(--text-base); padding: 16px 40px;
}
.cta-bottom .btn--primary:hover {
  background: var(--color-cream); color: var(--color-text);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-white); color: var(--color-text-muted);
  padding: var(--space-8) 0; text-align: center;
  border-top: 1px solid var(--color-border-light);
}
.footer a { color: var(--color-brown); }
.footer a:hover { color: var(--color-brown-dark); }
.footer__note {
  font-size: var(--text-sm); line-height: var(--leading-normal);
  margin-bottom: var(--space-6); letter-spacing: var(--tracking-normal);
}
.footer__note-link { display: inline-block; margin-top: var(--space-3); }
.footer__copyright {
  font-family: var(--font-en); font-size: var(--text-xs);
  color: var(--color-text-secondary); letter-spacing: 0.06em;
}

/* ============================================
   MOBILE CTA
   ============================================ */
.mobile-cta {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border-light); box-shadow: 0 -2px 12px rgba(0,0,0,0.04);
}
.mobile-cta.is-visible { display: block; }
.btn--mobile-fixed { width: 100%; padding: var(--space-4); font-size: var(--text-sm); }

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 150;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-white); color: var(--color-text);
  border: 1px solid var(--color-border-light); border-radius: 50%;
  box-shadow: var(--shadow-sm); cursor: pointer;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); background: var(--color-cream); }

@media (max-width: 639px) {
  .back-to-top { bottom: 80px; right: 16px; width: 36px; height: 36px; }
}

/* ============================================
   UTILITIES
   ============================================ */
.is-hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (min-width: 640px) {
  .recommended__list { grid-template-columns: 1fr; }
}

@media (min-width: 960px) {
  .hero__headline { font-size: var(--text-4xl); line-height: 1.5; }
  .hero__subheadline { font-size: var(--text-xl); }
  .section__title { font-size: var(--text-3xl); }
}

@media (min-width: 1200px) {
  .header__inner { max-width: 1280px; }
  .nav__link { padding: 6px 8px; font-size: var(--text-xs); }
}

@media (max-width: 1199px) {
  .header { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--color-white); }
  .nav__toggle { display: flex; }
  .nav {
    position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0;
    background: var(--color-white);
    display: flex; align-items: flex-start; justify-content: center;
    padding-top: var(--space-8); opacity: 0; visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s; overflow-y: auto; z-index: 199;
  }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; align-items: center; gap: 0; }
  .nav__link { font-size: var(--text-base); padding: var(--space-3) var(--space-8); }
}

@media (max-width: 959px) {
  .hero { min-height: auto; padding: var(--space-8) 0 var(--space-10); }
  .hero__inner { grid-template-columns: 1fr; text-align: left; gap: var(--space-8); }
  .hero__text { max-width: none; }
  .hero__badges { justify-content: flex-start; }
  .hero__logo-img { width: 200px; height: 200px; }
  .hero__visual { order: -1; }

}

@media (max-width: 639px) {
  .hero { padding: var(--space-6) 0 var(--space-8); }
  .hero__headline { font-size: var(--text-2xl); }
  .hero__subheadline { font-size: var(--text-base); }
  .hero__logo-img { width: 160px; height: 160px; }
  .hero__cta { font-size: var(--text-sm); padding: 14px 28px; }

  .section { padding: var(--space-10) 0; }
  .section__title { font-size: var(--text-xl); margin-bottom: var(--space-6); }

  .flow__step { gap: var(--space-4); }
  .flow__step-number { width: 40px; height: 40px; font-size: var(--text-sm); }
  .flow__step::before { left: 19px; top: 40px; }

  .growth__item { grid-template-columns: 40px 1fr; }
  .growth__number { width: 40px; height: 40px; font-size: var(--text-sm); }

  .basics__dl { grid-template-columns: 1fr; }
  .basics__dt { padding-bottom: 4px; border-bottom: none; }
  .basics__dd { padding-top: 0; padding-bottom: var(--space-4); margin-bottom: var(--space-2); }

  .sns__list { grid-template-columns: 1fr; max-width: none; margin: 0; }
  .sns__item { width: 100%; }

  .book-rules__examples { grid-template-columns: 1fr; }

  body.has-mobile-cta { padding-bottom: 72px; }
}

/* ============================================
   LOADING STATE
   ============================================ */
body.is-loading .header,
body.is-loading .hero__inner,
body.is-loading main,
body.is-loading .footer { opacity: 0; }

body:not(.is-loading) .header,
body:not(.is-loading) .hero__inner,
body:not(.is-loading) main,
body:not(.is-loading) .footer { opacity: 1; transition: opacity 0.5s ease; }

/* ============================================
   PRINT
   ============================================ */
@media print {
  .header, .mobile-cta, .hero__cta, .btn { display: none; }
  body { padding-top: 0; }
  .section { padding: 1.5rem 0; break-inside: avoid; }
  body { font-size: 12pt; }
}