/* ベーススタイル */
:root {
  --primary-blue: #2563eb;
  --light-blue: #dbeafe;
  --dark-blue: #1e40af;
  --green-accent: #10b981;
  --light-green: #d1fae5;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', YuGothic, sans-serif;
  line-height: 1.7;
  color: var(--gray-800);
  overflow-x: hidden;
}

/* ヘッダー */
.header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-blue);
  text-decoration: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-list a {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-list a:hover {
  color: var(--primary-blue);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-800);
}

/* ヒーローセクション */
.hero {
  background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url('../images/hero.jpg') center/cover;
  opacity: 0.15;
  z-index: 0;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  color: var(--gray-900);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-content .highlight {
  color: var(--primary-blue);
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
}

.cta-button {
  display: inline-block;
  background: var(--green-accent);
  color: var(--white);
  padding: 1rem 2.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.cta-button:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-secondary {
  background: var(--primary-blue);
  margin-left: 1rem;
}

.cta-secondary:hover {
  background: var(--dark-blue);
}

/* セクション共通 */
.section {
  padding: 5rem 2rem;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  color: var(--gray-900);
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--green-accent);
  margin: 1rem auto 0;
  border-radius: 2px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* 背景色付きセクション */
.bg-gray {
  background: var(--gray-50);
}

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

/* メリットセクション */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.benefit-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  text-align: center;
}

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

.benefit-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.benefit-card h3 {
  font-size: 1.5rem;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.benefit-card p {
  color: var(--gray-600);
  line-height: 1.7;
}

/* おすすめセクション */
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.recommend-item {
  background: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  border-left: 4px solid var(--primary-blue);
  box-shadow: var(--shadow);
}

.recommend-item h3 {
  font-size: 1.25rem;
  color: var(--primary-blue);
  margin-bottom: 0.5rem;
}

.recommend-item p {
  color: var(--gray-600);
}

/* 選ばれる理由 */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.reason-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.reason-number {
  display: inline-block;
  width: 50px;
  height: 50px;
  background: var(--primary-blue);
  color: var(--white);
  border-radius: 50%;
  text-align: center;
  line-height: 50px;
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.reason-card h3 {
  font-size: 1.5rem;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.reason-card p {
  color: var(--gray-600);
}

/* コース・料金 */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.course-header {
  background: var(--primary-blue);
  color: var(--white);
  padding: 2rem;
  text-align: center;
}

.course-header h3 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.course-price {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 1rem 0;
}

.course-price span {
  font-size: 1rem;
  font-weight: 400;
}

.course-body {
  padding: 2rem;
}

.course-features {
  list-style: none;
  margin-bottom: 2rem;
}

.course-features li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-600);
}

.course-features li:before {
  content: '✓';
  color: var(--green-accent);
  font-weight: 700;
  margin-right: 0.5rem;
}

.course-card .cta-button {
  width: 100%;
  text-align: center;
}

/* 授業の進め方 */
.flow-container {
  max-width: 800px;
  margin: 0 auto;
}

.flow-steps {
  display: grid;
  gap: 2rem;
}

.flow-step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  background: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  background: var(--green-accent);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
}

.step-content h3 {
  font-size: 1.5rem;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--gray-600);
}

/* 講師紹介 */
.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.teacher-card {
  background: var(--white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.teacher-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.teacher-info {
  padding: 2rem;
}

.teacher-info h3 {
  font-size: 1.5rem;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.teacher-title {
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: 1rem;
}

.teacher-subjects {
  background: var(--light-green);
  color: var(--green-accent);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  display: inline-block;
  font-weight: 600;
  margin-bottom: 1rem;
}

.teacher-info p {
  color: var(--gray-600);
  line-height: 1.7;
}

/* 成績アップ事例 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  position: relative;
}

.testimonial-quote {
  font-size: 3rem;
  color: var(--primary-blue);
  opacity: 0.2;
  position: absolute;
  top: 1rem;
  left: 1rem;
}

.testimonial-text {
  color: var(--gray-600);
  margin-bottom: 1.5rem;
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--gray-200);
  padding-top: 1rem;
}

.testimonial-author strong {
  color: var(--gray-900);
}

.testimonial-role {
  color: var(--gray-600);
  font-size: 0.875rem;
}

.results-highlight {
  background: var(--light-green);
  color: var(--green-accent);
  padding: 1rem;
  border-radius: 0.5rem;
  text-align: center;
  font-weight: 700;
  margin-top: 1rem;
}

/* FAQ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.5rem;
  background: var(--white);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  transition: background 0.3s;
}

.faq-question:hover {
  background: var(--gray-50);
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary-blue);
  transition: transform 0.3s;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer-content {
  padding: 0 1.5rem 1.5rem;
  color: var(--gray-600);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* お問い合わせフォーム */
.contact-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--gray-900);
  font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--gray-200);
}

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

.contact-method-icon {
  font-size: 2.5rem;
  color: var(--primary-blue);
  margin-bottom: 1rem;
}

.contact-method h3 {
  font-size: 1.25rem;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.contact-method p {
  color: var(--gray-600);
}

.contact-method a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
}

/* フッター */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: 3rem 2rem 1rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  color: var(--white);
}

.footer-section p,
.footer-section a {
  color: var(--gray-200);
  line-height: 1.8;
}

.footer-section a {
  text-decoration: none;
  display: block;
  margin-bottom: 0.5rem;
  transition: color 0.3s;
}

.footer-section a:hover {
  color: var(--green-accent);
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  width: 40px;
  height: 40px;
  background: var(--gray-800);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.3s;
}

.social-links a:hover {
  background: var(--primary-blue);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: 2rem;
  text-align: center;
  color: var(--gray-200);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .nav-list {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    box-shadow: var(--shadow);
  }

  .nav-list.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 3rem 1rem;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-image {
    order: -1;
  }

  .section {
    padding: 3rem 1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .cta-secondary {
    margin-left: 0;
    margin-top: 1rem;
    display: block;
  }

  .benefits-grid,
  .recommend-grid,
  .reasons-grid,
  .courses-grid,
  .teachers-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .flow-step {
    flex-direction: column;
    text-align: center;
  }

  .contact-container {
    padding: 2rem 1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* アニメーション */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* スクロールアニメーション用 */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.scroll-reveal.active {
  opacity: 1;
  transform: translateY(0);
}