/* ===== CSS Variables ===== */
:root {
  /* Light Theme Colors - Orange/Pink Theme */
  --primary-color: #ff6156;
  --primary-dark: #ff4842;
  --primary-hover: #ff4842;
  --primary-rgb: 255, 97, 86;
  --secondary-color: #ff8c6b;
  --accent-color: #ffeaa7;
  --success-color: #6c5ce7;
  --warning-color: #fdcb6e;
  --error-color: #e84393;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.1);
  
  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  
  /* Border Colors */
  --border-color: #e2e8f0;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-dark: #94a3b8;
  
  /* Card Background */
  --card-bg: #ffffff;
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --navbar-height: 80px;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  /* Primary colors for dark theme - Orange/Pink Theme */
  --primary-color: #ff8c9e;
  --primary-dark: #ff6b9d;
  --primary-hover: #ff6b9d;
  --primary-rgb: 255, 140, 158;
  --secondary-color: #ffa574;
  --accent-color: #ffe58f;
  --success-color: #6c5ce7;
  --warning-color: #fdcb6e;
  --error-color: #e84393;
  
  /* Background Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-overlay: rgba(255, 255, 255, 0.1);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-inverse: #1e293b;
  
  /* Border Colors */
  --border-color: #334155;
  --border-light: #334155;
  --border-medium: #475569;
  --border-dark: #64748b;
  
  /* Card Background */
  --card-bg: #1e293b;
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* ダークモード特有のスタイル調整 */
[data-theme="dark"] {
  /* スクロールバーのスタイル */
  scrollbar-width: thin;
  scrollbar-color: var(--border-medium) var(--bg-secondary);
}

[data-theme="dark"] ::-webkit-scrollbar {
  width: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: var(--border-dark);
}

/* ダークモードでの選択テキストスタイル */
[data-theme="dark"] ::selection {
  background: rgba(99, 102, 241, 0.3);
  color: var(--text-primary);
}

/* ダークモードでのフォーカス表示 */
[data-theme="dark"] *:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ダークモードでのホバー効果強化 */
[data-theme="dark"] .btn:hover {
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

[data-theme="dark"] .feature-card:hover,
[data-theme="dark"] .skill-card:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  border-color: var(--primary-color);
}

/* ダークテーマのスキル別配色 - Gensparkスタイル */
[data-theme="dark"] .skill-card {
  background: var(--bg-card);
  border-color: rgba(75, 85, 99, 0.5);
}

[data-theme="dark"] .skill-card:hover {
  border-color: rgba(107, 114, 128, 0.7);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .skill-card h3 {
  color: var(--text-primary);
}

[data-theme="dark"] .skill-card .skill-description {
  color: var(--text-secondary);
}

[data-theme="dark"] .skill-card .skill-goal {
  border-color: rgba(75, 85, 99, 0.5);
}

[data-theme="dark"] .skill-card .skill-goal span {
  color: var(--text-primary);
}

/* 質問力 - ダークテーマ */
[data-theme="dark"] .skill-card[data-skill="question"] .skill-icon-large {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="question"] .skill-subtitle {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="question"] .skill-goal {
  background-color: rgba(255, 140, 158, 0.1);
}

/* 要約力 - ダークテーマ */
[data-theme="dark"] .skill-card[data-skill="summary"] .skill-icon-large {
  color: var(--secondary-color);
}

[data-theme="dark"] .skill-card[data-skill="summary"] .skill-subtitle {
  color: var(--secondary-color);
}

[data-theme="dark"] .skill-card[data-skill="summary"] .skill-goal {
  background-color: rgba(255, 165, 116, 0.1);
}

/* 構造化力 - ダークテーマ */
[data-theme="dark"] .skill-card[data-skill="structure"] .skill-icon-large {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="structure"] .skill-subtitle {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="structure"] .skill-goal {
  background-color: rgba(255, 140, 158, 0.1);
}

/* 言語化力 - ダークテーマ */
[data-theme="dark"] .skill-card[data-skill="verbalization"] .skill-icon-large {
  color: var(--secondary-color);
}

[data-theme="dark"] .skill-card[data-skill="verbalization"] .skill-subtitle {
  color: var(--secondary-color);
}

[data-theme="dark"] .skill-card[data-skill="verbalization"] .skill-goal {
  background-color: rgba(255, 165, 116, 0.1);
}

/* 操作スピード力 - ダークテーマ */
[data-theme="dark"] .skill-card[data-skill="speed"] .skill-icon-large {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="speed"] .skill-subtitle {
  color: var(--primary-color);
}

[data-theme="dark"] .skill-card[data-skill="speed"] .skill-goal {
  background-color: rgba(255, 140, 158, 0.1);
}

/* ===== Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* テーマ切り替え時のスムーズアニメーション */
* {
  transition: 
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-normal);
}

/* アニメーションを無効にする要素 */
.progress-bar,
.skill-progress,
[class*="animate"],
[class*="transition"] {
  transition: none;
}

/* テーマ切り替えボタンのアニメーション */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle i {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.theme-toggle:hover i {
  transform: scale(1.1);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===== Navigation ===== */
.navbar {
  background-color: var(--bg-card);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

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

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

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

.navbar .nav-brand .brand-icon {
  font-size: 1.5rem;
}

.navbar .nav-brand .brand-text {
  font-size: 1rem;
  font-weight: 700 !important;
  color: var(--primary-color);
}

/* より強い特異性でナビゲーションブランドテキストを定義 */
.navbar .nav-container .nav-brand a .brand-text {
  font-weight: 700 !important;
}

/* ダークモード対応 */
[data-theme="dark"] .navbar .nav-brand .brand-text,
[data-theme="dark"] .navbar .nav-container .nav-brand a .brand-text {
  font-weight: 700 !important;
  color: var(--primary-color);
}

.navbar .nav-brand .brand-text i {
  margin: 0 0.25rem;
  font-size: 1.1em;
}

.brand-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-left: 0.5rem;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 1px;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-medium);
  border-radius: 0.5rem;
  padding: 0.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
}

.theme-toggle:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  background: var(--bg-secondary);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition-fast);
  border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* ===== Hero Section ===== */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 2rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 2rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

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

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

.hero-image {
  width: 100%;
  max-width: 700px;
  height: auto;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  animation: float 3s ease-in-out infinite;
}

.floating-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: float 3s ease-in-out infinite;
}

.floating-card i {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.floating-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.floating-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ===== Sections ===== */
.overview,
.skills,
.mindset,
.cta {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.feature-icon {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: white;
  font-size: 1.5rem;
  box-shadow: var(--shadow-md);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Layer Structure Section ===== */
.layer-structure {
  background: var(--bg-primary);
  padding: 3rem 0;
}

.layers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin: 1.5rem 0 3rem 0;
  padding: 0 1rem;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: visible;
  display: block;
  text-decoration: none;
  color: inherit;
}

.layer-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
  cursor: pointer;
}

.layer-card.featured {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, var(--bg-card), rgba(99, 102, 241, 0.05));
}

.layer-number {
  position: absolute;
  top: -15px;
  left: -15px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  z-index: 2;
}

.layer-icon {
  display: inline-block;
  margin-right: 1rem;
  margin-bottom: 0;
}

.layer-icon i {
  font-size: 2rem;
  color: var(--primary-color);
}

.layer-card[data-layer="copy"] .layer-icon i {
  color: var(--primary-color);
}

.layer-card[data-layer="design"] .layer-icon i {
  color: var(--primary-color);
}

.layer-card[data-layer="human"] .layer-icon i {
  color: var(--primary-color);
}

.layer-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.layer-content h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0;
  flex: 1;
}

.layer-content-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.layer-subtitle {
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
  min-width: 60px;
}

.layer-card[data-layer="copy"] .layer-subtitle {
  color: var(--primary-color);
}

.layer-card[data-layer="design"] .layer-subtitle {
  color: var(--primary-color);
}

.layer-card[data-layer="human"] .layer-subtitle {
  color: var(--primary-color);
}

.layer-card[data-layer="meta"] .layer-icon i {
  color: var(--primary-color);
}

.layer-card[data-layer="meta"] .layer-subtitle {
  color: var(--primary-color);
}

.layer-description {
  color: var(--text-secondary);
  line-height: 1.5;
  font-size: 0.9rem;
  flex: 1;
  margin: 0;
}

.layer-benefit {
  background: var(--bg-tertiary);
  border-radius: 0.5rem;
  padding: 0.625rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.layer-benefit i {
  color: #f59e0b;
  font-size: 1rem;
}

.layer-benefit span {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.layers-comparison {
  margin-top: 3rem;
}

.comparison-table {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  max-width: 900px;
  margin: 0 auto;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 2fr;
  gap: 1rem;
}

.comparison-row.header {
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-light);
}

.comparison-row.header .comparison-cell {
  font-weight: 600;
  color: var(--text-primary);
}

.comparison-row:not(.header) {
  border-bottom: 1px solid var(--border-light);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-cell {
  padding: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.comparison-cell.layer-name {
  font-weight: 600;
}

.comparison-cell.layer-name.copy {
  color: var(--primary-color);
}

.comparison-cell.layer-name.design {
  color: var(--primary-color);
}

.comparison-cell.layer-name.human {
  color: var(--primary-color);
}

.comparison-cell.layer-name.meta {
  color: var(--primary-color);
}

/* ===== Meta-prompt Mastery Section ===== */
.meta-prompt-mastery {
  background: var(--bg-secondary);
  padding: 4rem 0;
}

.mastery-content {
  display: flex;
  align-items: flex-start;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.mastery-text {
  flex: 2;
}

.mastery-intro {
  margin-bottom: 2rem;
}

.mastery-intro h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mastery-intro i {
  color: var(--primary-color);
}

.mastery-intro p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.mastery-techniques {
  margin-bottom: 2rem;
}

.mastery-techniques h4 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mastery-techniques i {
  color: var(--primary-color);
}

.technique-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.technique-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.technique-icon {
  background: rgba(255, 97, 86, 0.1);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.technique-icon i {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.technique-text h5 {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.technique-text p {
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.mastery-goal {
  background: var(--bg-card);
  border: 2px solid var(--primary-color);
  border-radius: 1rem;
  padding: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.goal-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.goal-icon i {
  color: white;
  font-size: 1.5rem;
}

.goal-text h4 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.goal-text p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.mastery-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.progression-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.flow-item {
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: 1rem;
  padding: 1.5rem;
  text-align: center;
  min-width: 140px;
  transition: var(--transition-smooth);
}

.flow-item.highlight {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, var(--bg-card), rgba(255, 97, 86, 0.05));
  box-shadow: var(--shadow-md);
}

.flow-item i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  display: block;
}

.flow-item p {
  color: var(--text-primary);
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.flow-arrow {
  color: var(--text-tertiary);
  font-size: 1.5rem;
}

.mastery-cta {
  text-align: center;
  margin-top: 3rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .mastery-content {
    flex-direction: column;
    gap: 2rem;
  }
  
  .mastery-visual {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .technique-item {
    padding: 1rem;
  }
  
  .mastery-goal {
    padding: 1.5rem;
  }
  
  .progression-flow {
    gap: 1rem;
  }
}

/* ===== Skills Grid ===== */
.skills {
  background-color: var(--bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.skills-grid .skill-card:nth-child(1),
.skills-grid .skill-card:nth-child(2),
.skills-grid .skill-card:nth-child(3) {
  grid-column: span 1;
}

.skills-grid-bottom {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.skills-grid-bottom .skill-card {
  flex: 0 0 calc(33.333% - 0.5rem);
  max-width: 400px;
}

/* スキルカードの基本スタイルは下で定義 */

/* スキル別の配色 - Gensparkスタイル */
.skill-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: white;
  border: 2px solid #e5e7eb;
  transition: all 0.3s ease;
  padding: 1.5rem;
}

.skill-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: #d1d5db;
}

.skill-card .skill-number {
  position: absolute;
  top: 15px;
  left: 15px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
  z-index: 2;
  color: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.skill-card .skill-icon-large {
  position: absolute;
  top: -10px;
  right: -10px;
  font-size: 5rem;
  opacity: 0.08;
  transform: rotate(15deg);
  transition: all 0.3s ease;
}

.skill-card:hover .skill-icon-large {
  opacity: 0.12;
  transform: rotate(0deg) scale(1.1);
}

.skill-card .skill-content {
  margin-left: 50px;
  margin-top: 8px;
}

.skill-card h3 {
  color: #1f2937;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  margin: 0;
}

.skill-card .skill-subtitle {
  font-weight: 500;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
  margin: 0 0 0.25rem 0;
}

.skill-card .skill-description {
  color: #6b7280;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  margin: 0 0 0.75rem 0;
}

.skill-card .skill-goal {
  display: flex;
  align-items: center;
  margin-top: 0.75rem;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid;
  font-size: 0.875rem;
  margin: 0.75rem 0 0 0;
}

.skill-card .skill-goal i {
  margin-right: 0.5rem;
  color: #f59e0b;
}

.skill-card .skill-goal span {
  color: #374151;
}

/* 質問力 */
.skill-card[data-skill="question"] .skill-number {
  background-color: var(--primary-color);
}

.skill-card[data-skill="question"] .skill-icon-large {
  color: var(--primary-color);
}

.skill-card[data-skill="question"] .skill-subtitle {
  color: var(--primary-color);
}

.skill-card[data-skill="question"] .skill-goal {
  background-color: rgba(255, 97, 86, 0.1);
  border-color: rgba(255, 97, 86, 0.3);
}

/* 要約力 */
.skill-card[data-skill="summary"] .skill-number {
  background-color: var(--secondary-color);
}

.skill-card[data-skill="summary"] .skill-icon-large {
  color: var(--secondary-color);
}

.skill-card[data-skill="summary"] .skill-subtitle {
  color: var(--secondary-color);
}

.skill-card[data-skill="summary"] .skill-goal {
  background-color: rgba(255, 140, 107, 0.1);
  border-color: rgba(255, 140, 107, 0.3);
}

/* 構造化力 */
.skill-card[data-skill="structure"] .skill-number {
  background-color: var(--primary-color);
}

.skill-card[data-skill="structure"] .skill-icon-large {
  color: var(--primary-color);
}

.skill-card[data-skill="structure"] .skill-subtitle {
  color: var(--primary-color);
}

.skill-card[data-skill="structure"] .skill-goal {
  background-color: rgba(255, 97, 86, 0.1);
  border-color: rgba(255, 97, 86, 0.3);
}

/* 言語化力 */
.skill-card[data-skill="verbalization"] .skill-number {
  background-color: var(--secondary-color);
}

.skill-card[data-skill="verbalization"] .skill-icon-large {
  color: var(--secondary-color);
}

.skill-card[data-skill="verbalization"] .skill-subtitle {
  color: var(--secondary-color);
}

.skill-card[data-skill="verbalization"] .skill-goal {
  background-color: rgba(255, 140, 107, 0.1);
  border-color: rgba(255, 140, 107, 0.3);
}

/* 操作スピード力 */
.skill-card[data-skill="speed"] .skill-number {
  background-color: var(--primary-color);
}

.skill-card[data-skill="speed"] .skill-icon-large {
  color: var(--primary-color);
}

.skill-card[data-skill="speed"] .skill-subtitle {
  color: var(--primary-color);
}

.skill-card[data-skill="speed"] .skill-goal {
  background-color: rgba(255, 97, 86, 0.1);
  border-color: rgba(255, 97, 86, 0.3);
}

.skill-number {
  position: absolute;
  top: 15px;
  left: 15px;
  background-color: #374151;
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.skill-icon-large {
  position: absolute;
  top: -10px;
  right: -10px;
  font-size: 5rem;
  color: #374151;
  opacity: 0.08;
  transform: rotate(15deg);
  transition: all 0.3s ease;
}

.skill-card:hover .skill-icon-large {
  opacity: 0.12;
  transform: rotate(0deg) scale(1.1);
}

.skill-content {
  margin-top: 8px;
  margin-left: 50px;
}

.skill-card h3 {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #1f2937;
}

.skill-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.skill-subtitle {
  color: #1f2937;
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.skill-description {
  color: #6b7280;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.skill-goal {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: #f3f4f6;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid #e5e7eb;
  margin-bottom: 0;
}

.skill-goal i {
  color: #374151;
  font-size: 0.875rem;
}

.skill-goal span {
  color: #374151;
  font-size: 0.875rem;
  font-weight: 500;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 0.5rem;
  width: 0%;
  transition: width var(--transition-slow);
}

/* ===== Mindset Section ===== */
.mindset-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.mindset-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
}

.comparison-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 1.5rem;
}

.comparison-item h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.comparison-item.old h4 {
  color: var(--error-color);
}

.comparison-item.new h4 {
  color: var(--success-color);
}

.comparison-item ul {
  list-style: none;
}

.comparison-item li {
  padding: 0.25rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.comparison-arrow {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.unicorn-illustration {
  text-align: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.unicorn-illustration i {
  font-size: 4rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.unicorn-illustration p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.5;
}

/* ===== CTA Section ===== */
.cta {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-inverse);
}

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

.cta h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.cta .btn-primary {
  background-color: var(--text-inverse);
  color: var(--primary-color);
}

.cta .btn-primary:hover {
  background-color: var(--bg-tertiary);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.footer {
  background-color: var(--bg-tertiary);
  border-top: 1px solid var(--border-light);
  padding: 3rem 0 1rem;
}

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

.footer-brand h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.footer-section h4 {
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ===== Navigation More Menu ===== */
.nav-more-menu {
  position: relative;
  display: none;
}

.nav-more-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
  padding: 0.5rem;
}

.nav-more-button:hover {
  color: var(--primary-color);
}

.nav-more-button i {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.nav-more-menu.active .nav-more-button i {
  transform: rotate(180deg);
}

.nav-more-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 1000;
}

.nav-more-menu.active .nav-more-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  border-radius: 0.25rem;
  margin: 0.25rem;
}

.nav-dropdown-link:hover {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

/* Hide/Show elements for different breakpoints */
.nav-hide-md {
  display: block;
}

.nav-show-md {
  display: none;
}

/* ===== Responsive Design ===== */
/* Tablet Navigation - Hide Archive and Community, show More menu */
@media (max-width: 1200px) and (min-width: 1051px) {
  .nav-hide-md {
    display: none;
  }
  
  .nav-show-md {
    display: block;
  }
}

/* Mobile Navigation - Full menu toggle */
@media (max-width: 1050px) {
  .nav-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: 100%;
    background: var(--bg-card);
    border-top: 1px solid var(--border-light);
    flex-direction: column;
    padding: 1rem;
    gap: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
  }
  
  .nav-menu.mobile-active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-hide-md,
  .nav-show-md {
    display: block;
  }
  
  .nav-more-menu {
    display: none;
  }
  
  .nav-controls {
    gap: 0.5rem;
  }
  
  .theme-toggle {
    width: 2rem;
    height: 2rem;
    padding: 0.25rem;
  }
}

/* Additional mobile styles for smaller screens */
@media (max-width: 768px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .mindset-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .comparison {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .comparison-arrow {
    transform: rotate(90deg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .layers-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 2rem 0 3rem 0;
    padding: 0 0.5rem;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .layers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 0 1rem;
  }
}

@media (max-width: 768px) {  
  .comparison-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .comparison-cell {
    padding: 0.75rem;
    font-size: 0.875rem;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .skills-grid-bottom {
    flex-direction: column;
    align-items: center;
  }
  
  .skills-grid-bottom .skill-card {
    flex: none;
    width: 100%;
    max-width: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.5rem;
  }
  
  .hero {
    padding: 6rem 0 2rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-header h2 {
    font-size: 2rem;
  }
  
  .layer-card {
    padding: 1.5rem;
    margin: 15px 10px 0 10px;
  }
  
  .layer-icon i {
    font-size: 2.5rem;
  }
  
  .layer-content h3 {
    font-size: 1.25rem;
  }
  
  .features-grid,
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid .skill-card:nth-child(1),
  .skills-grid .skill-card:nth-child(2),
  .skills-grid .skill-card:nth-child(3) {
    grid-column: span 1;
  }
  
  .skills-grid-bottom {
    flex-direction: column;
    align-items: center;
  }
  
  .skills-grid-bottom .skill-card {
    flex: none;
    width: 100%;
    max-width: none;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }

.hidden { display: none; }
.visible { display: block; }

/* ===== AI Assistant Integration Styles ===== */

/* Global responsive utilities for AI features */
.ai-section {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
  .ai-section {
    margin: 1rem 0;
    padding: 1rem;
    border-radius: 8px;
  }
}

/* Ensure AI assistant button is accessible on mobile */
.ai-chat-button {
  z-index: 9999 !important;
}

/* Responsive grid for recommendations */
.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

@media (max-width: 768px) {
  .recommendations-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
  }
}

/* Skill tag consistency */
.skill-tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 6px;
  margin: 0.125rem;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.skill-tag.question,
.skill-tag.質問力 {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fecaca;
}

.skill-tag.summary,
.skill-tag.要約力 {
  background: #dbeafe;
  color: #1e40af;
  border-color: #93c5fd;
}

.skill-tag.structure,
.skill-tag.構造化力 {
  background: #d1fae5;
  color: #065f46;
  border-color: #86efac;
}

.skill-tag.verbalization,
.skill-tag.言語化力 {
  background: #fef3c7;
  color: #92400e;
  border-color: #fcd34d;
}

.skill-tag.speed,
.skill-tag.操作スピード力 {
  background: #ede9fe;
  color: #5b21b6;
  border-color: #c4b5fd;
}

/* Loading states */
.loading-spinner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin: 0 auto 0.5rem;
}

.loading-spinner i {
  font-size: 1.25rem;
  color: var(--primary-color);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Error states */
.error-state,
.recommendations-error {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.error-state i,
.recommendations-error i {
  font-size: 2rem;
  color: var(--error-color);
  margin-bottom: 0.5rem;
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  .loading-spinner i {
    animation: none;
  }
  
  .fade-in-up {
    animation: none;
  }
  
  * {
    transition: none !important;
    animation: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .skill-tag {
    border: 2px solid currentColor;
    font-weight: 600;
  }
  
  .ai-section {
    border: 2px solid var(--border-dark);
  }
}

/* Focus indicators for accessibility */
.challenge-start-btn:focus,
.ai-chat-button:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .ai-chat-button,
  .ai-recommendations-section {
    display: none !important;
  }
}