/* ===================================
   宮台真司 公式ポータルサイト
   Ocean Theme Design System
   - 海とトロピカルアイランドをテーマにしたデザイン
   =================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@500;700;900&display=swap');

/* ===================================
   CSS Custom Properties (Variables)
   - マングローブとターコイズリバー テーマカラーパレット
   =================================== */
:root {
  /* Core Colors - 深い森と川 Base */
  --color-bg-primary: #0a1a14;
  --color-bg-secondary: #0f2a1e;
  --color-bg-tertiary: #163828;

  /* Primary Accent - ターコイズブルー（川の色） */
  --color-accent: #00b8a9;
  --color-accent-light: #4dd8c9;
  --color-accent-dark: #008f7a;
  --color-accent-glow: rgba(0, 184, 169, 0.3);

  /* Secondary Accent - フォレストグリーン（マングローブ） */
  --color-secondary: #3d9970;
  --color-secondary-light: #5cc48e;
  --color-secondary-dark: #2a6b4e;

  /* Tertiary Accent - 空のブルー */
  --color-tertiary: #4a90c2;
  --color-tertiary-light: #7ab8e0;
  --color-tertiary-dark: #2d6a9f;

  /* Nature Gradient Colors */
  --color-forest-deep: #0d3b1e;
  --color-forest-mid: #1e5f3c;
  --color-river-shallow: #00d4c8;
  --color-sky-blue: #6fb6d9;

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #c8e6dc;
  --color-text-muted: #7aa48f;

  /* Functional Colors */
  --color-border: rgba(255, 255, 255, 0.12);
  --color-overlay: rgba(10, 26, 20, 0.95);

  /* Typography */
  --font-serif: 'Noto Serif JP', 'Yu Mincho', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-xxl: 10rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

/* ===================================
   Reset & Base Styles
   =================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);

  /* 波紋テクスチャ効果 */
  background-image:
    radial-gradient(ellipse at 30% 20%, rgba(0, 188, 212, 0.08), transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(38, 166, 154, 0.06), transparent 50%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  background-blend-mode: overlay, overlay, soft-light;
  background-size: 100% 100%, 100% 100%, 200px 200px;
}

a {
  color: var(--color-accent-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-text-primary);
}

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

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900;
  letter-spacing: 0.05em;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  letter-spacing: 0.03em;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

.section-title {
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary), transparent);
}

/* ===================================
   Layout
   =================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

section {
  padding: var(--space-xxl) 0;
}

/* ===================================
   Navigation
   =================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: transparent;
  transition: background var(--transition-normal), backdrop-filter var(--transition-normal);
}

.nav.scrolled {
  background: var(--color-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.1em;
}

.nav-logo span {
  color: var(--color-accent-light);
}

.nav-menu {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav-menu a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  padding: var(--space-xs) 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  transition: width var(--transition-fast);
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition-fast);
}

/* ===================================
   Hero Section - Ocean Theme
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--space-xxl) 0;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(10, 22, 40, 0.4) 0%, rgba(10, 22, 40, 0.6) 50%, rgba(10, 22, 40, 0.85) 100%),
    radial-gradient(ellipse at 20% 80%, var(--color-accent-glow), transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(38, 166, 154, 0.15), transparent 50%);
  pointer-events: none;
}

/* 波のアニメーション効果 */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to top, var(--color-bg-primary), transparent);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-size: 0.9rem;
  color: var(--color-accent-light);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.hero-title {
  margin-bottom: var(--space-md);
  color: #ffffff;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5),
    0 0 60px rgba(0, 188, 212, 0.3);
}

.hero-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-lg);
  line-height: 2;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
   Buttons - Ocean Theme
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  color: var(--color-text-primary);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-secondary-light) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--color-accent-glow);
}

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

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  background: rgba(0, 188, 212, 0.1);
}

/* ===================================
   About Section
   =================================== */
.about {
  background: var(--color-bg-secondary);
  position: relative;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-secondary), transparent);
}

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

.about-image {
  position: relative;
}

.about-image img {
  border-radius: var(--radius-md);
  filter: contrast(1.1) saturate(0.95);
}

.about-image::before {
  content: '';
  position: absolute;
  inset: 20px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  z-index: -1;
  transform: translate(20px, 20px);
}

.about-content h2 {
  margin-bottom: var(--space-md);
}

.about-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.about-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.keyword {
  padding: var(--space-xs) var(--space-sm);
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.15) 0%, rgba(38, 166, 154, 0.15) 100%);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-accent-light);
  border: 1px solid var(--color-accent-dark);
  transition: all var(--transition-fast);
}

.keyword:hover {
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.25) 0%, rgba(38, 166, 154, 0.25) 100%);
  transform: translateY(-2px);
}

/* ===================================
   Projects Section
   =================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.project-card {
  position: relative;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: 0 20px 50px rgba(0, 188, 212, 0.2);
}

.project-card:hover::before {
  opacity: 1;
}

.project-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: linear-gradient(135deg, #f0f8ff 0%, #e0f7fa 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-md);
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-content {
  padding: var(--space-md);
}

.project-label {
  font-size: 0.75rem;
  color: var(--color-secondary-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
  display: inline-block;
}

.project-content h3 {
  margin-bottom: var(--space-xs);
}

.project-content p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ===================================
   Media Section
   =================================== */
.media-section {
  padding: var(--space-xxl) 0;
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  position: relative;
}

.section-description {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  font-size: 1.1rem;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.media-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  text-decoration: none;
  color: inherit;
  display: block;
}

.media-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: 0 20px 50px rgba(0, 188, 212, 0.2);
}

.media-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #f0f8ff 0%, #e0f7fa 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 31, 56, 0.2), transparent);
  pointer-events: none;
}

.media-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-sm);
  transition: transform var(--transition-slow);
}

.media-card:hover .media-image img {
  transform: scale(1.05);
}

.media-info {
  padding: var(--space-md);
}

.media-info h3 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

.media-info p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.media-role {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, rgba(0, 188, 212, 0.15) 0%, rgba(38, 166, 154, 0.15) 100%);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--color-accent-light);
  border: 1px solid var(--color-accent-dark);
}

/* ===================================
   Video Section - YouTube Embeds
   =================================== */
.video-section {
  padding: var(--space-xxl) 0;
  background: var(--color-bg-primary);
  position: relative;
}

.video-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-secondary), transparent);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.video-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.video-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0, 188, 212, 0.15);
}

.video-channel-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.video-channel-desc {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.video-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  /* 16:9 aspect ratio */
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

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

.video-channel-btn {
  width: 100%;
  justify-content: center;
}

/* Video Card Link Style */
.video-card-link {
  text-decoration: none;
  display: block;
  cursor: pointer;
}

.video-card-link:hover {
  text-decoration: none;
}

.video-thumbnail {
  position: relative;
  background: linear-gradient(135deg, rgba(0, 184, 169, 0.1), rgba(61, 153, 112, 0.15));
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  margin-bottom: var(--space-md);
  transition: all var(--transition-normal);
}

.video-card-link:hover .video-thumbnail {
  background: linear-gradient(135deg, rgba(0, 184, 169, 0.2), rgba(61, 153, 112, 0.25));
}

.video-play-icon {
  font-size: 3rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  transition: transform var(--transition-normal);
}

.video-card-link:hover .video-play-icon {
  transform: scale(1.2);
  color: var(--color-accent-light);
}

.video-cta {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

.video-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
}

.video-tag {
  padding: 0.25rem 0.75rem;
  background: rgba(0, 184, 169, 0.1);
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--color-accent-light);
}

@media (max-width: 992px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   Enhanced Scroll Animations
   =================================== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scroll-reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.scroll-reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.scroll-reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Parallax effect for sections */
.parallax-bg {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

/* Staggered animation delays */
.stagger-1 {
  transition-delay: 0.1s;
}

.stagger-2 {
  transition-delay: 0.2s;
}

.stagger-3 {
  transition-delay: 0.3s;
}

.stagger-4 {
  transition-delay: 0.4s;
}

.stagger-5 {
  transition-delay: 0.5s;
}

.stagger-6 {
  transition-delay: 0.6s;
}

/* Floating animation for decorative elements */
@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-15px) rotate(2deg);
  }
}

.float-animation {
  animation: float 6s ease-in-out infinite;
}

/* Pulse glow effect */
@keyframes pulseGlow {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(0, 184, 169, 0.3);
  }

  50% {
    box-shadow: 0 0 40px rgba(0, 184, 169, 0.6);
  }
}

.pulse-glow {
  animation: pulseGlow 3s ease-in-out infinite;
}

/* ===================================
   Archive Section
   =================================== */
.archive {
  background: var(--color-bg-secondary);
  position: relative;
}

.archive::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-secondary), transparent);
}

.archive-filters {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-xs) var(--space-sm);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-md);
}

.book-card {
  display: flex;
  gap: var(--space-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.book-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 188, 212, 0.15);
}

.book-cover {
  flex-shrink: 0;
  width: 90px;
  height: 130px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.book-card:hover .book-cover img {
  transform: scale(1.05);
}

.book-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.book-year {
  font-size: 0.75rem;
  color: var(--color-accent-light);
  margin-bottom: var(--space-xs);
}

.book-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.book-publisher {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Amazon Badge */
a.book-card {
  text-decoration: none;
  display: flex;
  cursor: pointer;
}

.amazon-badge {
  display: inline-block;
  width: 140px;
  margin-top: var(--space-xs);
  font-size: 0.75rem;
  color: var(--color-accent);
  padding: 0.4rem 0;
  background: rgba(0, 188, 212, 0.1);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent-dark);
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  box-sizing: border-box;
}

a.book-card:hover .amazon-badge {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  color: white;
  border-color: transparent;
}

/* ===================================
   Contact Section
   =================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-info h3 {
  margin-bottom: var(--space-md);
}

.contact-list {
  list-style: none;
}

.contact-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.contact-list li:hover {
  color: var(--color-accent-light);
}

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

.social-links {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.social-link {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  border-color: var(--color-accent);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 15px rgba(0, 188, 212, 0.2);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.input-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  margin-top: -5px;
}

.form-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  line-height: 1.8;
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--color-bg-primary);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-secondary), transparent);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-text-primary);
}

.footer-text {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes wave {

  0%,
  100% {
    transform: translateX(0) translateY(0);
  }

  50% {
    transform: translateX(-10px) translateY(5px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

.animate-in {
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.animate-delay-1 {
  animation-delay: 0.1s;
}

.animate-delay-2 {
  animation-delay: 0.2s;
}

.animate-delay-3 {
  animation-delay: 0.3s;
}

.animate-delay-4 {
  animation-delay: 0.4s;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 992px) {

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-overlay);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

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

  .nav-toggle {
    display: flex;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: var(--space-xl) 0;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .media-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   Sub Pages Header
   - 下層ページ用ヘッダー（問い合わせ詳細等）
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.header .nav {
  position: static;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  background: transparent;
}

.header .logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: 0.1em;
}

.header .nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.header .nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  padding: var(--space-xs) 0;
  position: relative;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header .nav-links a:hover {
  color: var(--color-accent-light);
}

.header .nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  transition: width var(--transition-fast);
}

.header .nav-links a:hover::after {
  width: 100%;
}

/* Mobile Navigation for Sub Pages */
@media (max-width: 768px) {
  .header .nav-links {
    display: none;
  }

  .header .nav {
    justify-content: center;
  }
}

/* ===================================
   Contact Detail Pages
   - 問い合わせ詳細ページ用スタイル
   =================================== */

/* Hero Section for Contact Pages */
.contact-hero {
  position: relative;
  height: 60vh;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: 60px;
  /* ヘッダー分のマージン */
}

.hero-image-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-image-full {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 70%;
  filter: brightness(0.7);
}

/* 各問い合わせページの画像位置調整 */
.hero-image-writing {
  object-position: center 15%;
  /* 顔が上にあるため上寄りに */
}

.hero-image-lecture {
  object-position: center 25%;
  /* 顔が上にあるため上寄りに */
}

.hero-image-media {
  object-position: center 40%;
  /* 顔が良い位置にある */
}

.hero-image-film {
  object-position: center 20%;
  /* 顔が上にあるため上寄りに */
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom,
      rgba(10, 26, 20, 0.3) 0%,
      rgba(10, 26, 20, 0.6) 50%,
      rgba(10, 26, 20, 0.9) 100%);
}

.contact-hero .container {
  position: relative;
  z-index: 2;
}

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

.contact-hero .hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.contact-hero .hero-subtitle {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

/* Contact Content Section */
.contact-content {
  padding: var(--space-xl) 0;
  background: var(--color-bg-primary);
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.content-text {
  color: var(--color-text-secondary);
}

.contact-content .section-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent);
}

.content-block {
  margin-bottom: var(--space-lg);
}

.content-block h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-accent-light);
  margin-bottom: var(--space-sm);
}

.text-description {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.text-description.highlight-text {
  background: linear-gradient(135deg, rgba(0, 184, 169, 0.1), rgba(61, 153, 112, 0.1));
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent);
  font-weight: 500;
  color: var(--color-text-primary);
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  position: relative;
  padding-left: 1.8rem;
  margin-bottom: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.feature-list li::before {
  content: "▶";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.7rem;
  top: 0.4rem;
}

.feature-list li strong {
  color: var(--color-text-primary);
}

/* CTA Block */
.cta-block {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  margin-top: var(--space-xl);
  border: 1px solid var(--color-border);
}

.cta-block h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.cta-block p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.cta-block .btn {
  display: inline-flex;
  margin-bottom: var(--space-md);
}

.cta-block .note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Contact list links */
.contact-list a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.contact-list a:hover {
  color: var(--color-accent-light);
}

/* Responsive for Contact Pages */
@media (max-width: 768px) {
  .contact-hero {
    height: 50vh;
    min-height: 300px;
  }

  .contact-hero .hero-title {
    font-size: 2rem;
  }

  .contact-content {
    padding: var(--space-lg) 0;
  }

  .cta-block {
    padding: var(--space-md);
  }

  /* コンテンツブロックの改善 */
  .content-block h3 {
    font-size: 1.2rem;
  }

  .text-description {
    font-size: 0.95rem;
    line-height: 1.8;
  }

  .feature-list li {
    font-size: 0.95rem;
    padding-left: 1.5rem;
    margin-bottom: 0.6rem;
  }

  /* フッター改善 */
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* さらに小さいスマホ用 */
@media (max-width: 480px) {
  .contact-hero {
    height: 40vh;
    min-height: 250px;
  }

  .contact-hero .hero-title {
    font-size: 1.8rem;
  }

  .contact-hero .hero-subtitle {
    font-size: 0.9rem;
    letter-spacing: 0.1em;
  }

  .contact-content .section-title {
    font-size: 1.5rem;
  }

  .content-wrapper {
    padding: 0 var(--space-xs);
  }

  .cta-block {
    padding: var(--space-sm);
  }

  .cta-block h3 {
    font-size: 1.3rem;
  }

  .cta-block .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ===================================
   Profile Page Mobile Improvements
   - プロフィールページのスマホ対応改善
   =================================== */
@media (max-width: 768px) {
  .story-text {
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 1.2rem;
  }

  .story-chapter {
    padding: var(--space-md) 0;
  }

  .chapter-title {
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
  }

  .highlight-text {
    padding: var(--space-md);
    font-size: 1rem;
  }

  /* タイムライン改善 */
  .timeline-item {
    padding-left: var(--space-md);
  }

  .timeline-year {
    font-size: 0.9rem;
  }

  /* 略歴セクション改善 */
  .bio-section {
    padding: var(--space-md);
  }
}

@media (max-width: 480px) {
  .story-text {
    font-size: 0.95rem;
    line-height: 1.85;
  }

  .chapter-title {
    font-size: 1.2rem;
  }

  .highlight-text {
    padding: var(--space-sm);
    font-size: 0.95rem;
  }

  .profile-hero-content h1 {
    font-size: 2.5rem;
  }

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