@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&display=swap");

/* =====================================================================
   モバイルファースト設計
   基本スタイルはモバイル用、メディアクエリで拡張
===================================================================== */

/* =====================================================================
   CSS変数定義
===================================================================== */
:root {
  /* カラー設定 */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --instagram-gradient: linear-gradient(45deg, #f09433 0%,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888 100%);
  --primary-color: #764ba2;
  --secondary-color: #667eea;
  --accent-color: #f09433;
  --text-dark: #1a1a1a;
  --text-light: #ffffff;
  --bg-light: #f8f9fa;
  --bg-dark: #0f0f0f;

  /* シャドウ */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);

  /* スペーシング（モバイル基準） */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* フォントサイズ（モバイル基準） */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 28px;
  --text-4xl: 32px;

  /* その他 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================================
   リセット & ベース（モバイル優先）
===================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
  overflow-x: hidden;
  min-height: 100vh;
  min-height: -webkit-fill-available;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

button {
  border: none;
  background: none;
  font-family: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

ul, ol {
  list-style: none;
}

/* =====================================================================
   ユーティリティ（モバイル用）
===================================================================== */
.container {
  width: 100%;
  padding: 0 var(--space-md);
  margin: 0 auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =====================================================================
   ヘッダー（モバイル最適化）
===================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  min-height: 56px;
}

.header-logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.header-title {
  font-size: var(--text-lg);
  font-weight: 900;
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.subtitle {
  display: none;
}

/* モバイルメニューボタン */
.mobile-menu-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* モバイルメニュー（スライドダウン） */
.mobile-menu {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 999;
}

.mobile-menu .menu-list {
  display: flex;
  flex-direction: column;
  padding: var(--space-sm) var(--space-md);
  gap: 8px;
}

.mobile-menu .menu-link {
  padding: 12px;
  border-radius: 10px;
  font-weight: 600;
  color: var(--text-dark);
  background: rgba(0,0,0,0.02);
}

.mobile-menu .menu-link.primary {
  background: var(--primary-gradient);
  color: #fff;
  text-align: center;
}

body.menu-open .mobile-menu {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  position: absolute;
  transition: var(--transition);
}

.mobile-menu-btn span:nth-child(1) { transform: translateY(-6px); }
.mobile-menu-btn span:nth-child(3) { transform: translateY(6px); }

.menu-open .mobile-menu-btn span:nth-child(1) {
  transform: rotate(45deg);
}

.menu-open .mobile-menu-btn span:nth-child(2) {
  opacity: 0;
}

.menu-open .mobile-menu-btn span:nth-child(3) {
  transform: rotate(-45deg);
}

/* =====================================================================
   ヒーローセクション（モバイル最適化）
===================================================================== */
.hero {
  padding: calc(56px + var(--space-xl)) var(--space-md) var(--space-xl);
  min-height: 100vh;
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at 20% 80%, rgba(102,126,234,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(118,75,162,0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(240,148,51,0.04) 0%, transparent 50%),
    linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 150%;
  height: 150%;
  background: radial-gradient(circle, rgba(102,126,234,0.05) 0%, transparent 70%);
  animation: floatingGradient 20s ease-in-out infinite;
}

@keyframes floatingGradient {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(-10%, 10%) scale(1.1); }
  50% { transform: translate(10%, -10%) scale(0.9); }
  75% { transform: translate(-10%, -10%) scale(1.05); }
}

.hero-content {
  width: 100%;
}

.hero-text {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.hero-title {
  font-size: var(--text-3xl);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

.hero-title .line {
  display: block;
}

.hero-title .line + .line {
  margin-top: 4px;
}

.text-gradient {
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: var(--text-base);
  color: #666;
  margin-bottom: var(--space-lg);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  width: 100%;
  max-width: 280px;
  padding: 18px 32px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: var(--text-base);
  font-weight: 700;
  border-radius: 50px;
  box-shadow:
    0 4px 15px rgba(102,126,234,0.3),
    0 8px 30px rgba(118,75,162,0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
  transform: translate(-50%, -50%) rotate(45deg) translateY(-100%);
  transition: transform 0.6s;
}

.btn-primary:hover::before {
  transform: translate(-50%, -50%) rotate(45deg) translateY(0);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-arrow {
  display: none;
}

.hero-video {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-video-element {
  width: 100%;
  height: auto;
}

.scroll-indicator {
  display: none;
}

/* =====================================================================
   問題セクション（モダンデザイン）
===================================================================== */
.problems {
  padding: var(--space-2xl) 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
  position: relative;
}

.problems::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(103,126,234,0.3) 50%,
    transparent 100%);
}

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

.section-title-ja {
  font-size: var(--text-2xl);
  font-weight: 900;
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title-en {
  font-size: var(--text-xs);
  color: #999;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 600;
}

.problem-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.problem-card {
  background: linear-gradient(145deg, #ffffff 0%, #fafbfc 100%);
  border-radius: 20px;
  padding: 32px 24px;
  box-shadow:
    0 1px 3px rgba(0,0,0,0.02),
    0 4px 8px rgba(0,0,0,0.04),
    0 10px 24px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.04);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--instagram-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.problem-card.want {
  background: linear-gradient(145deg, #ffffff 0%, #f0f4ff 100%);
}

.problem-card.reality {
  background: linear-gradient(145deg, #ffffff 0%, #fff5f0 100%);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid rgba(103,126,234,0.1);
}

.card-icon {
  font-size: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(102,126,234,0.1) 0%, rgba(118,75,162,0.1) 100%);
}

.problem-card.want .card-icon {
  color: #667eea;
  background: linear-gradient(135deg, rgba(102,126,234,0.15) 0%, rgba(102,126,234,0.05) 100%);
}

.problem-card.reality .card-icon {
  color: #f09433;
  background: linear-gradient(135deg, rgba(240,148,51,0.15) 0%, rgba(240,148,51,0.05) 100%);
}

/* Material Icons スタイル */
.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-flex;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
  align-items: center;
  justify-content: center;
}

.problem-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  background: linear-gradient(135deg, #2a2a2a 0%, #4a4a4a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.problem-list {
  margin-top: var(--space-md);
}

.problem-list li {
  padding: 16px 20px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, rgba(103,126,234,0.03) 0%, rgba(118,75,162,0.03) 100%);
  border-radius: 12px;
  font-size: var(--text-sm);
  position: relative;
  border-left: 3px solid transparent;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
}

.problem-card.want .problem-list li {
  background: linear-gradient(135deg, rgba(102,126,234,0.05) 0%, rgba(102,126,234,0.02) 100%);
}

.problem-card.reality .problem-list li {
  background: linear-gradient(135deg, rgba(240,148,51,0.05) 0%, rgba(240,148,51,0.02) 100%);
}

.problem-list li::before {
  content: none;
}

.problem-list li::after {
  content: '→';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%) translateX(0);
  color: var(--primary-color);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.problem-list li:last-child {
  margin-bottom: 0;
}

/* =====================================================================
   ソリューション（モバイル最適化）
===================================================================== */
.solution {
  padding: var(--space-2xl) 0;
  background: var(--primary-gradient);
}

.solution .section-title-ja,
.solution .section-title-en {
  color: white;
}

.features {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-item {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: white;
  font-size: var(--text-sm);
  font-weight: 500;
}

.feature-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.highlight {
  color: #ffd700;
  font-weight: 700;
}

/* =====================================================================
   実績セクション（モバイル最適化）
===================================================================== */
.results {
  padding: var(--space-2xl) 0;
  background: white;
}

.results-video {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-lg);
}

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

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 900;
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.stat-unit {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-dark);
  display: inline-block;
}

.stat-label {
  font-size: var(--text-sm);
  color: #666;
  margin-top: var(--space-xs);
}

.stats-note {
  text-align: center;
  color: #999;
  font-size: var(--text-xs);
  margin-bottom: var(--space-lg);
}

.market-info {
  text-align: center;
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(240,148,51,0.1) 0%, rgba(220,39,67,0.1) 100%);
  border-radius: var(--radius-md);
}

.market-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--accent-color);
  color: white;
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: var(--space-md);
}

.market-info p {
  font-size: var(--text-base);
  line-height: 1.8;
}

/* =====================================================================
   コンセプト（モバイル最適化）
===================================================================== */
.concept {
  padding: var(--space-2xl) 0;
  background: var(--bg-light);
}

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

.concept-lead {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background: linear-gradient(135deg, rgba(103,126,234,0.1) 0%, rgba(118,75,162,0.1) 100%);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary-color);
  text-align: left;
}

.concept-list {
  text-align: left;
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.concept-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: var(--text-sm);
  padding-left: var(--space-lg);
  position: relative;
}

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

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

.concept-list strong {
  color: var(--primary-color);
}

.concept-note {
  font-size: var(--text-sm);
  color: #666;
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: rgba(240,148,51,0.1);
  border-radius: var(--radius-sm);
}

/* =====================================================================
   講師実績セクション（モバイル最適化）
===================================================================== */
.teacher {
  padding: var(--space-2xl) 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  position: relative;
}

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

.teacher-profile {
  margin-bottom: var(--space-xl);
}

.teacher-icon {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  box-shadow:
    0 4px 8px rgba(0,0,0,0.1),
    0 8px 24px rgba(102,126,234,0.15);
  border: 3px solid white;
  object-fit: cover;
}

.teacher-name {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.teacher-subtitle {
  font-size: var(--text-sm);
  color: #666;
  font-weight: 500;
}

.teacher-bio {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(103,126,234,0.03);
  border-radius: var(--radius-sm);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.teacher-bio p {
  font-size: var(--text-sm);
  color: #666;
  line-height: 1.8;
  margin: var(--space-xs) 0;
  position: relative;
  padding-left: var(--space-lg);
  text-align: left;
}

.teacher-bio p::before {
  content: '▸';
  position: absolute;
  left: 8px;
  color: var(--primary-color);
  font-weight: 700;
}

.achievement-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.achievement-card {
  background: white;
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow:
    0 2px 8px rgba(0,0,0,0.04),
    0 8px 24px rgba(0,0,0,0.08);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  text-align: center;
  border: 1px solid rgba(103,126,234,0.1);
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.achievement-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.achievement-icon {
  font-size: 28px;
  color: var(--primary-color);
  margin-bottom: var(--space-sm);
}

.achievement-number {
  font-size: 36px;
  font-weight: 900;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  line-height: 1;
  margin: var(--space-xs) 0;
}

.achievement-unit {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  margin-left: 2px;
}

.achievement-label {
  font-size: 13px;
  color: var(--text-dark);
  margin-top: var(--space-xs);
  font-weight: 700;
  line-height: 1.3;
}

.achievement-period {
  font-size: 11px;
  color: #999;
  margin-top: 4px;
  font-weight: 400;
  line-height: 1.3;
}

.teacher-message {
  max-width: 600px;
  margin: 0 auto;
}

.message-quote {
  padding: var(--space-lg);
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  position: relative;
  font-size: var(--text-base);
  line-height: 1.8;
  border-left: 4px solid var(--primary-color);
}

.quote-icon {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  font-size: 32px;
  color: var(--primary-color);
  opacity: 0.2;
}

/* =====================================================================
   メッセージ（モバイル最適化）
===================================================================== */
.message {
  padding: var(--space-2xl) 0;
  background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
}

.section-title-simple {
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--text-dark);
}

.message-content-centered {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.message-lead {
  font-size: var(--text-base);
  color: #666;
  margin-bottom: var(--space-lg);
}

.message-main {
  font-size: var(--text-xl);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary-color);
}

.message-main strong {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.message-sub {
  font-size: var(--text-base);
  line-height: 1.8;
  color: #666;
  margin-bottom: var(--space-lg);
}

.message-cta {
  font-size: var(--text-lg);
  color: var(--primary-color);
  font-weight: 700;
  padding: var(--space-md);
  background: linear-gradient(135deg, rgba(103,126,234,0.05) 0%, rgba(118,75,162,0.05) 100%);
  border-radius: var(--radius-md);
}

/* =====================================================================
   価格（モバイル最適化）
===================================================================== */
.pricing {
  padding: var(--space-2xl) 0;
  background: var(--primary-gradient);
}

.pricing-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '限定';
  position: absolute;
  top: 10px;
  right: -25px;
  background: #ff3333;
  color: white;
  padding: 3px 30px;
  transform: rotate(45deg);
  font-size: var(--text-xs);
  font-weight: 700;
}

.original-price {
  font-size: var(--text-sm);
  color: #999;
  text-decoration: line-through;
  margin-bottom: var(--space-md);
}

.price-amount {
  font-size: var(--text-4xl);
  font-weight: 900;
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.price-note {
  font-size: var(--text-sm);
  color: #666;
  margin-top: var(--space-xs);
}

.btn-cta {
  display: block;
  width: 100%;
  padding: var(--space-md);
  background: var(--instagram-gradient);
  color: white;
  font-size: var(--text-base);
  font-weight: 700;
  border-radius: 50px;
  margin-top: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.btn-cta:active {
  transform: scale(0.98);
}

/* =====================================================================
   追伸（モバイル最適化）
===================================================================== */
.postscript {
  padding: var(--space-xl) 0;
  background: var(--bg-light);
  text-align: center;
}

.postscript p {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--text-dark);
  padding: 0 var(--space-md);
}

/* =====================================================================
   フローティングCTA（モバイル最適化）
===================================================================== */
.floating-cta {
  position: fixed;
  bottom: var(--space-md);
  left: var(--space-md);
  right: var(--space-md);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(100px);
  transition: var(--transition);
}

.floating-cta.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.floating-btn {
  display: block;
  width: 100%;
  padding: var(--space-sm);
  background: var(--instagram-gradient);
  color: white;
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: 50px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

/* =====================================================================
   特典教材セクション
===================================================================== */
.bonus-materials {
    padding: 80px 20px;
    background: #f8f9fa;
}

.bonus-materials .section-title {
    text-align: center;
    margin-bottom: 60px;
    font-size: 28px;
    color: #333;
}

.bonus-materials .highlight {
    display: block;
    color: var(--primary-color);
    font-size: 20px;
    margin-top: 8px;
}

.bonus-item {
    background: white;
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 40px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.bonus-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f0f0;
}

.bonus-header .material-icons {
    font-size: 32px;
    color: var(--primary-color);
}

.bonus-header h3 {
    font-size: 20px;
    color: #333;
    margin: 0;
}

.bonus-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.bonus-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 12px;
}

.bonus-card h4 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.bonus-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bonus-card li {
    padding: 8px 0;
    font-size: 14px;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.bonus-card li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.bonus-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bonus-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
}

.bonus-list-item .material-icons {
    color: #4CAF50;
    font-size: 20px;
    flex-shrink: 0;
}

.bonus-list-item span:last-child {
    font-size: 14px;
    color: #333;
    line-height: 1.4;
}

/* =====================================================================
   フッター（モバイル最適化）
===================================================================== */
.footer {
  padding: var(--space-xl) 0;
  background: var(--bg-dark);
  color: white;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: center;
}

.copyright {
  font-size: var(--text-xs);
  color: #999;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
}

.footer-links a {
  color: #999;
  font-size: var(--text-xs);
}

/* =====================================================================
   アニメーション（モバイル最適化 - 軽量化）
===================================================================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.slide-in {
  animation: slideUp 0.6s ease-out;
}

/* =====================================================================
   タブレット対応（768px以上）
===================================================================== */
@media screen and (min-width: 768px) {
  :root {
    --text-base: 16px;
    --text-lg: 20px;
    --text-xl: 24px;
    --text-2xl: 32px;
    --text-3xl: 40px;
    --text-4xl: 48px;
  }

  .container {
    max-width: 750px;
    padding: 0 var(--space-lg);
  }

  .header-title {
    display: block;
  }

  .mobile-menu-btn {
    display: none;
  }

  .hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
  }

  .hero-text {
    text-align: left;
  }

  .btn-primary {
    width: auto;
    display: inline-flex;
  }

  .btn-arrow {
    display: block;
  }

  .problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

  .features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .stats {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-2xl);
  }

  .message-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-2xl);
    align-items: center;
  }

  .message-visual {
    width: 200px;
    height: 200px;
  }

  .pricing-card {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--space-2xl);
  }

  .btn-cta {
    width: auto;
    display: inline-block;
    padding: var(--space-md) var(--space-2xl);
  }

  .floating-cta {
    left: auto;
    right: var(--space-lg);
    width: auto;
  }

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
  }

  /* 講師実績セクション（タブレット） */
  .teacher-icon {
    width: 150px;
    height: 150px;
  }

  .achievement-grid {
    max-width: 500px;
    gap: var(--space-lg);
  }

  .achievement-card {
    padding: var(--space-xl);
  }

  .achievement-number {
    font-size: 48px;
  }

  .achievement-unit {
    font-size: 24px;
  }

  .achievement-label {
    font-size: var(--text-base);
  }

  .achievement-period {
    font-size: var(--text-sm);
  }

  .bonus-materials .section-title {
    font-size: 36px;
  }

  .bonus-materials .highlight {
    font-size: 24px;
  }

  .bonus-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .bonus-item {
    padding: 48px;
  }

  .bonus-header h3 {
    font-size: 24px;
  }
}

/* =====================================================================
   デスクトップ対応（1024px以上）
===================================================================== */
@media screen and (min-width: 1024px) {
  :root {
    --text-3xl: 48px;
    --text-4xl: 64px;
  }

  .container {
    max-width: 1200px;
  }

  .subtitle {
    display: block;
    font-size: var(--text-sm);
    color: #666;
  }

  .hero {
    min-height: 100vh;
  }

  .hero-title {
    font-size: var(--text-4xl);
  }

  .scroll-indicator {
    display: block;
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: #999;
    font-size: var(--text-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
  }

  .features {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .stat-number {
    font-size: 72px;
  }

  .message-visual {
    width: 300px;
    height: 300px;
  }

  .pricing-card {
    max-width: 600px;
    padding: 60px;
  }

  .price-amount {
    font-size: 64px;
  }

  /* ホバーエフェクト（デスクトップのみ） */
  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
  }

  .problem-card {
    cursor: default;
  }

  .problem-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow:
      0 4px 8px rgba(0,0,0,0.04),
      0 12px 24px rgba(0,0,0,0.08),
      0 20px 48px rgba(0,0,0,0.12);
  }

  .problem-card:hover::before {
    transform: scaleX(1);
  }

  .problem-list li:hover {
    border-left-color: var(--primary-color);
    transform: translateX(8px);
    background: linear-gradient(135deg, rgba(103,126,234,0.08) 0%, rgba(118,75,162,0.08) 100%);
  }

  .problem-card.want .problem-list li:hover {
    background: linear-gradient(135deg, rgba(102,126,234,0.12) 0%, rgba(102,126,234,0.08) 100%);
    border-left-color: #667eea;
  }

  .problem-card.reality .problem-list li:hover {
    background: linear-gradient(135deg, rgba(240,148,51,0.12) 0%, rgba(240,148,51,0.08) 100%);
    border-left-color: #f09433;
  }

  .problem-list li:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(5px);
  }

  .feature-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
  }

  .btn-cta:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  }

  a:hover {
    opacity: 0.8;
  }

  /* カードアイコンのアニメーション */
  .problem-card:hover .card-icon {
    animation: iconBounce 0.6s ease-in-out;
  }

  @keyframes iconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px) scale(1.1); }
  }
}

/* =====================================================================
   アクセシビリティ
===================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =====================================================================
   ダークモード対応
===================================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --text-dark: #f0f0f0;
    --bg-light: #1a1a1a;
    --bg-dark: #000000;
  }

  .header {
    background: rgba(26, 26, 26, 0.95);
  }

  .problem-card,
  .concept-list,
  .pricing-card {
    background: #2a2a2a;
    color: #f0f0f0;
  }

  .problem-list li,
  .concept-list li {
    border-bottom-color: #333;
  }
}

/* =====================================================================
   印刷対応
===================================================================== */
@media print {
  .header,
  .floating-cta,
  .scroll-indicator,
  .mobile-menu-btn {
    display: none !important;
  }

  body {
    font-size: 12pt;
  }

  .hero,
  section {
    page-break-inside: avoid;
  }
}