/* ============================================================
   AIお話会 — style.css
   カラーパレット:
     --color-navy   : #1A2744  (メイン・テキスト)
     --color-accent : #4A90D9  (アクセント・ボタン)
     --color-bg     : #FFFFFF  (背景)
     --color-bg-light: #F7F8FA (サブ背景)
     --color-border : #DDE3ED  (ボーダー)
     --color-text   : #2D3748  (本文)
     --color-muted  : #6B7280  (補足テキスト)
   ============================================================ */

/* ── リセット & ベース ── */

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

:root {
  --color-navy:      #1A2744;
  --color-accent:    #4A90D9;
  --color-accent-dark: #357abd;
  --color-bg:        #FFFFFF;
  --color-bg-light:  #F7F8FA;
  --color-border:    #DDE3ED;
  --color-text:      #2D3748;
  --color-muted:     #6B7280;

  --font-sans: 'Inter', 'Noto Sans JP', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-card: 0 2px 16px rgba(26,39,68,0.08);

  --container-width: 960px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.nowrap {
  white-space: nowrap;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.75;
}

ul {
  list-style: none;
}

/* ── レイアウト ── */

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section-padding {
  padding-block: var(--space-xl);
}

.bg-light {
  background: var(--color-bg-light);
}

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--space-lg);
}

/* ── タイポグラフィ ── */

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--color-navy);
  line-height: 1.4;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem);     font-weight: 700; }
h3 { font-size: 1.125rem;                       font-weight: 600; }

p { margin-block: 0.75em; }

.section-title {
  text-align: center;
  margin-bottom: var(--space-sm);
}

.section-lead {
  text-align: center;
  color: var(--color-muted);
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
}

/* ── ボタン ── */

.btn {
  display: inline-block;
  padding: 0.65em 1.5em;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, opacity 0.2s;
  text-align: center;
  white-space: nowrap;
  border: 2px solid transparent;
}

.btn-sm {
  padding: 0.4em 1em;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.85em 2em;
  font-size: 1rem;
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  opacity: 1;
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-outline:hover {
  background: var(--color-navy);
  color: #fff;
  opacity: 1;
}

/* ── ヘッダー ── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.02em;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--color-navy);
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a.active {
  color: var(--color-accent);
}

/* ハンバーガーボタン */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ── ヒーロー ── */

.hero {
  padding-block: var(--space-xl) calc(var(--space-xl) * 1.2);
  background: linear-gradient(160deg, #eef3fb 0%, var(--color-bg) 60%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 3fr 2fr;
  align-items: center;
  gap: 3rem;
  max-width: var(--container-width);
}

.hero-text {
  min-width: 0;
}

.hero-image {
  min-width: 0;
}

.hero-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.hero-title {
  margin-bottom: var(--space-sm);
}

.hero-lead {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-md);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── 問題提起 ── */

.problem-quote {
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-md);
  padding: 1.5rem 2rem;
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 1.05rem;
  color: var(--color-navy);
  line-height: 2;
}

.check-list--cross li::before {
  content: '✗';
  color: #e53e3e;
}

.problem-answer {
  max-width: 640px;
  margin-inline: auto;
  margin-top: var(--space-md);
  text-align: center;
  font-size: 1.05rem;
  line-height: 2;
}

/* ── ワークショップ内容 ── */

.workshop-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.workshop-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.25em 0.75em;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.workshop-main h3,
.workshop-details h3 {
  margin-bottom: 1rem;
  color: var(--color-navy);
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg);
}

.detail-list li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0;
  padding: 0.9rem 1.25rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.7;
}

.detail-list li:last-child {
  border-bottom: none;
}

.detail-list li span {
  font-weight: 600;
  color: var(--color-navy);
  white-space: nowrap;
}

.detail-list small {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ── 料金（2カラム） ── */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 800px;
  margin-inline: auto;
}

.pricing-card {
  background: var(--color-bg);
  border: 2px solid var(--color-navy);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.pricing-card--featured {
  border-color: var(--color-accent);
  position: relative;
}

.pricing-date-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3em 0.85em;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.pricing-date-badge--fixed {
  background: var(--color-navy);
  color: #fff;
}

.pricing-date-badge--flex {
  background: var(--color-accent);
  color: #fff;
}

.pricing-tagline {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

/* 得られること */
.gains {
  max-width: 640px;
  margin-inline: auto;
  margin-top: var(--space-lg);
  padding: 2rem 2.5rem;
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.gains h3 {
  text-align: center;
  margin-bottom: 1.25rem;
  color: var(--color-navy);
}

/* CTA ホスト署名 */
.cta-host {
  margin-top: var(--space-md);
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* ── 特長 ── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  color: var(--color-navy);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin: 0;
}

/* ── こんな方へ ── */

.check-list {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.check-list li {
  padding-left: 1.75rem;
  position: relative;
  font-size: 1rem;
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ── 料金 ── */

.pricing-card {
  max-width: 480px;
  margin-inline: auto;
  background: var(--color-bg);
  border: 2px solid var(--color-navy);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.pricing-label {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.pricing-unit {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-muted);
}

.pricing-features {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: 1.5rem;
}

.pricing-features li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}

.pricing-features li::before {
  content: '●';
  position: absolute;
  left: 0;
  font-size: 0.4rem;
  top: 0.55em;
  color: var(--color-accent);
}

.stripe-placeholder {
  margin-top: 0.5rem;
}

.stripe-btn-wrap {
  margin-top: 0.5rem;
}

.stripe-note {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 0.75rem;
  margin-bottom: 0;
  line-height: 1.7;
  text-align: center;
}

.stripe-secure {
  color: #2d8a4e;
  font-weight: 500;
}

/* ── FAQ ── */

.faq-list {
  max-width: 680px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  padding: 1.25rem 0.5rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-navy);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-left: 1rem;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 0.5rem 1.25rem;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ── EAコールアウト ── */

.ea-section {
  background: var(--color-bg-light);
}

.ea-callout {
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2.5rem;
  border-left: 6px solid var(--color-accent);
}

.ea-callout--wide {
  max-width: 800px;
  margin-inline: auto;
}

.ea-callout__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.ea-callout__title {
  color: #fff;
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.ea-callout p,
.prose .ea-callout p {
  color: rgba(255,255,255,0.85);
  font-size: 0.975rem;
  line-height: 1.9;
  margin-bottom: 0.75em;
}

.ea-callout p:last-child,
.prose .ea-callout p:last-child {
  margin-bottom: 0;
}

/* ── CTAバナー ── */

.cta-banner {
  background: var(--color-navy);
}

.cta-banner h2,
.cta-banner p {
  color: #fff;
}

.cta-banner p {
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--space-md);
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-banner .btn-outline {
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}

.cta-banner .btn-outline:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* ── フッター ── */

.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-lg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
}

.footer-nav a {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
}

.footer-nav a:hover {
  color: #fff;
  opacity: 1;
}

.footer-copy {
  font-size: 0.8rem;
  margin: 0;
}

/* ============================================================
   内部ページ共通
   ============================================================ */

/* ページヘッダー */
.page-hero {
  background: linear-gradient(160deg, #eef3fb 0%, var(--color-bg) 70%);
  padding-block: var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: 0.5rem;
}

.page-hero p {
  color: var(--color-muted);
  margin: 0;
}

/* 本文エリア */
.page-content {
  padding-block: var(--space-xl);
}

.prose {
  max-width: 720px;
  margin-inline: auto;
}

.prose h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-border);
}

.prose h3 {
  font-size: 1.05rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.prose p,
.prose li {
  font-size: 0.975rem;
  color: var(--color-text);
  line-height: 1.9;
}

.prose ul {
  list-style: disc;
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-block: 0.75em;
}

.prose ol {
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-block: 0.75em;
}

/* 法定表記テーブル */
.legal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-block: 1.5rem;
}

.legal-table th,
.legal-table td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  background: var(--color-bg-light);
  color: var(--color-navy);
  font-weight: 600;
  width: 30%;
  white-space: nowrap;
}

/* お問い合わせフォーム */
.contact-form {
  max-width: 640px;
  margin-inline: auto;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-navy);
}

.form-group .required {
  color: #e53e3e;
  margin-left: 0.25rem;
  font-size: 0.8rem;
}

.form-group input:not([type="checkbox"]),
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s;
  appearance: none;
}

.form-group input:not([type="checkbox"]):focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}

.form-submit {
  margin-top: 0.5rem;
}

/* ============================================================
   レスポンシブ (タブレット: max 768px)
   ============================================================ */

@media (max-width: 768px) {

  /* ヘッダー */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .site-nav .btn {
    margin-top: 0.5rem;
  }

  /* 特長グリッド */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* ワークショップ内容 */
  .workshop-inner {
    grid-template-columns: 1fr;
  }

  /* 料金グリッド */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  /* 料金カード */
  .pricing-card {
    padding: 2rem 1.5rem;
  }

  /* ヒーロー */
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-image {
    order: 1;
  }

  .hero-text {
    order: 2;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  /* 法定テーブル */
  .legal-table,
  .legal-table tbody,
  .legal-table tr,
  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
  }

  .legal-table th {
    border-bottom: none;
    padding-bottom: 0.4rem;
    white-space: normal;
  }

  .legal-table td {
    padding-top: 0.4rem;
    margin-bottom: 0.5rem;
  }
}

/* ============================================================
   レスポンシブ (スマホ: max 480px)
   ============================================================ */

@media (max-width: 480px) {
  :root {
    --space-xl: 3.5rem;
    --space-lg: 2rem;
  }

  .pricing-price {
    font-size: 2rem;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-lg {
    width: 100%;
    text-align: center;
  }
}