/*
 * LINE公式アカウント講座 - 共通CSS
 * /line-course/css/style.css
 * LPデザインを反映したアーカイブページ用
 */

:root {
  --primary: #06C755;
  --primary-dark: #04a648;
  --primary-light: #e8f9ef;
  --accent: #FF6B35;
  --accent-light: #FFF0EB;
  --text: #333;
  --text-light: #666;
  --bg: #f5f7fa;
  --white: #fff;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --radius: 16px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

/* ========================================
   ヘッダー
======================================== */
.header {
  background: var(--white);
  padding: 12px 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.3s;
}

.header-logo:hover {
  opacity: 0.8;
}

.header-logo img {
  height: 36px;
  width: auto;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 199, 85, 0.3);
}

.header-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s;
}

.header-back:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 199, 85, 0.3);
}

/* ========================================
   レッスンページ ヘッダー
======================================== */
.lesson-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 20px 24px;
}

.lesson-header-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.lesson-number-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  color: var(--white);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.lesson-header .lesson-title {
  color: var(--white);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700;
}

/* ========================================
   Hero セクション
======================================== */
.hero {
  padding: 100px 20px 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>') repeat;
  background-size: 60px;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  color: var(--white);
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 16px;
}

.hero-title .highlight {
  background: linear-gradient(transparent 60%, rgba(255,255,255,0.3) 60%);
}

.hero-description {
  font-size: 15px;
  opacity: 0.95;
  margin-bottom: 24px;
  line-height: 1.9;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-point {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  padding: 8px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
}

.hero-point svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--white);
  color: var(--primary);
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

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

.hero-image {
  max-width: 420px;
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

/* ========================================
   共通セクション
======================================== */
.section {
  padding: 60px 20px;
}

.section-inner {
  max-width: 900px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-label {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 900;
  line-height: 1.4;
  color: var(--text);
}

.section-title .highlight {
  color: var(--primary);
}

.section-description {
  margin-top: 12px;
  color: var(--text-light);
  font-size: 15px;
}

/* ========================================
   ログインセクション
======================================== */
.login-section {
  background: var(--white);
}

.login-card {
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px;
}

.login-card-title {
  font-size: 18px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  color: var(--text);
}

.login-form {
  max-width: 100%;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 16px;
  transition: all 0.3s;
  background: var(--white);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-note {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 8px;
}

.submit-btn {
  width: 100%;
  padding: 16px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.submit-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.submit-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
}

/* ========================================
   メッセージ
======================================== */
.message {
  padding: 14px 16px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 14px;
}

.message.success {
  background: var(--primary-light);
  color: #2e7d32;
}

.message.error {
  background: #ffebee;
  color: #c62828;
}

.message.info {
  background: #e3f2fd;
  color: #1565c0;
}

.login-link-box {
  background: var(--primary-light);
  border: 2px solid var(--primary);
  border-radius: 10px;
  padding: 16px;
  margin-top: 16px;
}

.login-link-box p {
  font-size: 13px;
  color: #666;
  margin-bottom: 8px;
}

.login-link-box a {
  display: block;
  word-break: break-all;
  color: #1976d2;
  font-weight: 600;
}

/* ========================================
   Features セクション
======================================== */
.features {
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border-radius: var(--radius);
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 72px;
  height: 72px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 32px;
}

.feature-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-description {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========================================
   Curriculum セクション
======================================== */
.curriculum {
  background: var(--white);
}

.curriculum-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.curriculum-item {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  transition: all 0.3s;
}

.curriculum-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.curriculum-number {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.curriculum-content h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.curriculum-content p {
  font-size: 13px;
  color: var(--text-light);
}

.curriculum-action {
  flex-shrink: 0;
}

.curriculum-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.3s;
}

.curriculum-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ========================================
   Pricing セクション
======================================== */
.pricing {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
}

.pricing .section-label {
  background: rgba(255,255,255,0.2);
  color: var(--white);
}

.pricing .section-title {
  color: var(--white);
}

/* ========================================
   講師紹介
======================================== */
.instructor {
  background: var(--white);
}

.instructor-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 50px;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-light) 0%, #f0fdf4 100%);
  border-radius: var(--radius);
  padding: 50px;
  max-width: 900px;
  margin: 0 auto;
}

.instructor-image {
  position: relative;
}

.instructor-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 1;
  object-fit: cover;
  width: 100%;
}

.instructor-info h3 {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.instructor-name {
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 8px;
  color: var(--text);
}

.instructor-title {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.instructor-title a {
  color: var(--primary);
  text-decoration: underline;
}

.instructor-bio {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
}

.instructor-bio p {
  margin-bottom: 16px;
}

.instructor-bio p:last-child {
  margin-bottom: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  color: var(--text);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pricing-card.recommended {
  transform: scale(1.03);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.pricing-card.recommended::before {
  content: 'おすすめ';
  position: absolute;
  top: 16px;
  right: -32px;
  background: var(--accent);
  color: var(--white);
  padding: 5px 40px;
  font-size: 11px;
  font-weight: 700;
  transform: rotate(45deg);
}

.pricing-plan {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.pricing-price {
  margin-bottom: 8px;
}

.pricing-price .amount {
  font-size: 40px;
  font-weight: 900;
  color: var(--primary);
  font-family: 'Poppins', sans-serif;
}

.pricing-price .currency {
  font-size: 16px;
  font-weight: 700;
}

.pricing-price .tax {
  font-size: 13px;
  color: var(--text-light);
}

.pricing-original {
  font-size: 13px;
  color: var(--text-light);
  text-decoration: line-through;
  margin-bottom: 6px;
}

.pricing-save {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 16px;
}

.pricing-note {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 20px;
  flex-grow: 1;
  list-style: none;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 8px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
}

.pricing-button {
  display: block;
  background: var(--primary);
  color: var(--white);
  padding: 14px 20px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: all 0.3s;
  margin-top: auto;
}

.pricing-button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.pricing-button.secondary {
  background: var(--bg);
  color: var(--text);
}

.pricing-button.secondary:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* ========================================
   CTA セクション
======================================== */
.cta {
  background: linear-gradient(135deg, var(--primary-light) 0%, #f0fdf4 100%);
  text-align: center;
}

.cta-title {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text);
  line-height: 1.5;
}

.cta-description {
  color: var(--text-light);
  margin-bottom: 28px;
  font-size: 15px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  transition: all 0.3s;
}

.cta-button.primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(6, 199, 85, 0.3);
}

.cta-button.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(6, 199, 85, 0.4);
}

.cta-button.secondary {
  background: var(--white);
  color: var(--text);
  border: 2px solid #ddd;
}

.cta-button.secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ========================================
   LINE友だち追加セクション
======================================== */
.line-cta {
  background: var(--white);
  text-align: center;
}

.line-cta-description {
  color: var(--text-light);
  margin-bottom: 24px;
  font-size: 15px;
  line-height: 1.8;
}

.line-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #06C755;
  color: var(--white);
  padding: 16px 32px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(6, 199, 85, 0.3);
}

.line-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(6, 199, 85, 0.4);
}

.line-cta-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-light);
}

/* ========================================
   マイページ（ログイン後）
======================================== */
.mypage-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 20px 24px;
}

.mypage-hero-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-greeting {
  color: var(--white);
  font-size: 18px;
  font-weight: 600;
}

.logout-btn {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.5);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.logout-btn:hover {
  background: var(--white);
  color: var(--primary);
}

.mypage-content {
  background: var(--bg);
  padding-top: 32px;
}

.mypage-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.mypage-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

/* 質問カード */
.question-card {
  background: var(--white);
  text-align: center;
}

.question-card .mypage-card-title,
.question-card .card-title {
  border-bottom-color: #1976d2;
}

.question-card-text {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.8;
}

.question-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1976d2;
  color: var(--white);
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(25, 118, 210, 0.3);
}

.question-card-btn:hover {
  background: #1565c0;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(25, 118, 210, 0.4);
}

/* ========================================
   Q&Aセクション
======================================== */
.qa-card .mypage-card-title {
  border-bottom-color: #ff9800;
}

.qa-card-description {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.qa-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.qa-lesson {
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--white);
}

.qa-lesson-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #f8f9fa;
  cursor: pointer;
  transition: background 0.3s;
}

.qa-lesson-header:hover {
  background: #f0f0f0;
}

.qa-lesson-number {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.qa-lesson-title {
  flex: 1;
  font-weight: 600;
  font-size: 14px;
}

.qa-lesson-count {
  font-size: 12px;
  color: var(--text-light);
  background: #e0e0e0;
  padding: 4px 10px;
  border-radius: 20px;
}

.qa-lesson-toggle {
  color: #999;
  transition: transform 0.3s;
}

.qa-lesson.open .qa-lesson-toggle {
  transform: rotate(180deg);
}

.qa-lesson-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.qa-lesson.open .qa-lesson-content {
  max-height: 2000px;
}

.qa-item {
  padding: 20px;
  border-top: 1px solid #f0f0f0;
}

.qa-question,
.qa-answer {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.qa-question {
  margin-bottom: 12px;
}

.qa-label {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.qa-label.q {
  background: var(--primary);
  color: var(--white);
}

.qa-label.a {
  background: #ff9800;
  color: var(--white);
}

.qa-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.8;
}

.qa-question .qa-text {
  font-weight: 600;
}

.qa-empty {
  text-align: center;
  color: var(--text-light);
  padding: 40px 20px;
  font-size: 14px;
}

/* レッスンページ用 Q&A（シンプル表示） */
.qa-item-simple {
  padding: 20px;
  background: #f8f9fa;
  border-radius: 12px;
  margin-bottom: 12px;
}

.qa-item-simple:last-child {
  margin-bottom: 0;
}

.qa-question-simple,
.qa-answer-simple {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.qa-question-simple {
  margin-bottom: 12px;
}

.qa-question-simple .qa-text {
  font-weight: 600;
}

/* ========================================
   講座リスト（マイページ用）
======================================== */
.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg);
  border-radius: 12px;
  transition: all 0.3s;
}

.lesson-item.purchased {
  background: var(--primary-light);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.lesson-item.purchased:hover {
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(6, 199, 85, 0.2);
}

.lesson-item.purchased.preparing {
  cursor: default;
}

.lesson-item.purchased.preparing:hover {
  transform: none;
  box-shadow: none;
}

.lesson-item.locked {
  opacity: 0.8;
}

.lesson-item .lesson-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
}

.lesson-item.purchased .lesson-number {
  background: var(--primary);
  color: var(--white);
}

.lesson-item.locked .lesson-number {
  background: #ddd;
  color: #999;
  font-size: 18px;
}

.lesson-content {
  flex: 1;
  min-width: 0;
}

.lesson-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.lesson-description {
  font-size: 12px;
  color: var(--text-light);
}

.lesson-action {
  flex-shrink: 0;
}

/* ========================================
   ボタン共通
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-outline {
  background: var(--white);
  border: 1px solid #ddd;
  color: var(--text-light);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline.disabled {
  cursor: default;
  opacity: 0.6;
}

.btn-outline.disabled:hover {
  border-color: #ddd;
  color: var(--text-light);
}

/* ========================================
   一括購入バナー
======================================== */
.bulk-banner {
  background: linear-gradient(135deg, #fff8e1, #ffecb3);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.bulk-banner-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.bulk-banner-icon {
  font-size: 36px;
}

.bulk-banner-title {
  font-weight: 700;
  color: #f57c00;
  font-size: 15px;
  margin-bottom: 4px;
}

.bulk-banner-price {
  font-size: 24px;
  font-weight: 900;
  color: #e65100;
}

.bulk-banner-price span {
  font-size: 14px;
  font-weight: 500;
}

.bulk-banner-note {
  font-size: 12px;
  color: #666;
  margin-top: 2px;
}

.bulk-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f57c00;
  color: var(--white);
  padding: 12px 24px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: all 0.3s;
  white-space: nowrap;
}

.bulk-banner-btn:hover {
  background: #e65100;
  transform: translateY(-2px);
}

/* ========================================
   ローディング
======================================== */
.loading-fullpage {
  text-align: center;
  padding: 120px 20px 60px;
  color: var(--text-light);
}

.loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #e0e0e0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   フッター
======================================== */
.footer {
  background: #1a1a1a;
  color: #ccc;
  padding: 48px 20px 24px;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand {
  font-size: 14px;
  line-height: 1.8;
}

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: 16px;
}

.footer-links h4 {
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #999;
  text-decoration: none;
  font-size: 13px;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #333;
  font-size: 12px;
  color: #666;
}

/* ========================================
   ユーティリティ
======================================== */
.hidden {
  display: none !important;
}

/* ========================================
   レスポンシブ
======================================== */
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-visual {
    margin-top: 24px;
  }
  
  .hero-image {
    max-width: 240px;
  }
  
  .hero-points {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .curriculum-item {
    grid-template-columns: auto 1fr;
    gap: 12px;
  }
  
  .curriculum-action {
    grid-column: 1 / -1;
    margin-top: 4px;
  }
  
  .instructor-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 30px;
  }
  
  .instructor-image {
    max-width: 200px;
    margin: 0 auto;
  }
  
  .curriculum-btn {
    width: 100%;
    justify-content: center;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .pricing-card.recommended {
    transform: none;
  }
  
  .bulk-banner {
    flex-direction: column;
    text-align: center;
  }
  
  .bulk-banner-content {
    flex-direction: column;
  }
  
  .lesson-item {
    flex-wrap: wrap;
  }
  
  .lesson-action {
    width: 100%;
    margin-top: 8px;
  }
  
  .lesson-action .btn {
    width: 100%;
    justify-content: center;
  }
  
  .mypage-hero-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  
  .footer-logo {
    margin: 0 auto 16px;
  }
}

@media (max-width: 480px) {
  .header-logo {
    font-size: 14px;
  }
  
  .header-cta {
    padding: 8px 14px;
    font-size: 12px;
  }
  
  .hero {
    padding: 90px 16px 40px;
  }
  
  .hero-title {
    font-size: 24px;
  }
  
  .hero-description {
    font-size: 14px;
  }
  
  .section {
    padding: 40px 16px;
  }
  
  .login-card {
    padding: 24px 20px;
  }
  
  .pricing-card {
    padding: 24px 20px;
  }
  
  .mypage-card {
    padding: 20px 16px;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-button {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

/* ========================================
   レッスンページ用（既存維持）
======================================== */
.header-lesson {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  padding: 20px;
}

.header-lesson .header-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  opacity: 0.9;
  transition: opacity 0.3s;
}

.back-btn:hover {
  opacity: 1;
}

.header-lesson .header-content {
  flex: 1;
}

.header-lesson .lesson-number {
  font-size: 13px;
  opacity: 0.9;
}

.header-lesson .lesson-name {
  font-size: 18px;
  font-weight: 700;
}

.container-wide {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 動画 */
.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* 自前ホスティング動画用 */
.video-wrapper-self {
  position: static;
  padding-bottom: 0;
  overflow: visible;
}

.video-wrapper-self video {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: 12px;
}

.video-note {
  margin-top: 12px;
  padding: 12px 16px;
  background: #fff8e1;
  border-radius: 8px;
  font-size: 13px;
  color: #666;
}

.video-note strong {
  color: #f57c00;
}

/* PDF */
.pdf-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pdf-download {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--primary-light);
  border-radius: 12px;
}

.pdf-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 24px;
  flex-shrink: 0;
}

.pdf-info {
  flex: 1;
}

.pdf-title {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
}

.pdf-size {
  font-size: 12px;
  color: var(--text-light);
}

.pdf-buttons {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.3s;
}

.pdf-btn:hover {
  background: var(--primary-dark);
}

.pdf-btn-outline {
  background: var(--white);
  border: 1px solid var(--primary);
  color: var(--primary);
}

.pdf-btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

/* 次回講座 */
.next-lesson {
  background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.next-lesson-info {
  flex: 1;
}

.next-lesson-label {
  font-size: 12px;
  color: #666;
  margin-bottom: 4px;
}

.next-lesson-title {
  font-weight: 600;
  font-size: 15px;
}

.next-lesson-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: #1976d2;
  color: var(--white);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s;
}

.next-lesson-btn:hover {
  background: #1565c0;
}

.next-lesson-btn.locked {
  background: #9e9e9e;
  cursor: not-allowed;
}

/* アクセス制限 */
.access-denied {
  text-align: center;
  padding: 60px 20px;
}

.access-denied-icon {
  font-size: 64px;
  margin-bottom: 20px;
}

.access-denied-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.access-denied-text {
  color: var(--text-light);
  margin-bottom: 24px;
}

@media (max-width: 480px) {
  .pdf-download {
    flex-direction: column;
    text-align: center;
  }
  
  .pdf-buttons {
    width: 100%;
    flex-direction: column;
  }
  
  .pdf-btn {
    width: 100%;
    justify-content: center;
  }
  
  .next-lesson {
    flex-direction: column;
    text-align: center;
  }
}