/* ===================================
   デザインシステム - CSS変数
   =================================== */
:root {
  /* カラー - ダークテーマ */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-glass: rgba(255, 255, 255, 0.05);

  /* テキストカラー */
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.5);

  /* アクセントカラー */
  --color-accent-primary: #8b5cf6;
  --color-accent-secondary: #06b6d4;
  --color-accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);

  /* ボーダー */
  --border-color: rgba(255, 255, 255, 0.1);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;

  /* シャドウ */
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
  --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.3);

  /* スペーシング */
  --section-padding: 100px 0;
  --container-max-width: 1200px;

  /* トランジション */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* タイポグラフィ */
  --font-primary: 'Inter', 'Noto Sans JP', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ===================================
   リセット & ベーススタイル
   =================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

/* ===================================
   ユーティリティクラス
   =================================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.glass {
  background: var(--color-bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
}

/* ===================================
   ナビゲーション
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  transition: var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* モバイルメニュートグル */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 10px;
}

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

/* ===================================
   ヒーローセクション
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
    var(--color-bg-primary);
}

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

.hero-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-accent-primary);
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
}

.hero-name-en {
  font-size: clamp(1rem, 3vw, 1.5rem);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
  margin-bottom: 24px;
}

.hero-role {
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--color-accent-gradient);
  border-radius: var(--border-radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-glow);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.5);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  animation: bounce 2s infinite;
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-10px);
  }

  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* ===================================
   セクション共通スタイル
   =================================== */
.section {
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===================================
   Aboutセクション
   =================================== */
.about {
  background: var(--color-bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-wrapper {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
}

.about-image-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-accent-gradient);
  opacity: 0.2;
}

.about-image-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--color-text-muted);
}

.about-text h3 {
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.about-info-item {
  padding: 20px;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

.about-info-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.about-info-value {
  font-size: 1rem;
  font-weight: 600;
}

/* ===================================
   作品セクション
   =================================== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.work-card {
  background: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.work-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-accent-primary);
}

.work-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.work-thumbnail-placeholder {
  font-size: 3rem;
  color: var(--color-text-muted);
}

.work-info {
  padding: 24px;
}

.work-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.work-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.work-tag {
  padding: 4px 12px;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-full);
  font-size: 0.75rem;
  color: var(--color-accent-primary);
  border: 1px solid var(--color-accent-primary);
}

.work-links {
  display: flex;
  gap: 12px;
}

.work-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.work-link:hover {
  color: var(--color-accent-primary);
}

/* 作品セクションの空状態 */
.works-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 40px;
  background: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  border: 2px dashed var(--border-color);
}

.works-empty-icon {
  font-size: 4rem;
  margin-bottom: 20px;
  opacity: 0.5;
}

.works-empty-text {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

/* ===================================
   スキルセクション
   =================================== */
.skills {
  background: var(--color-bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.skill-card {
  padding: 40px 30px;
  background: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.skill-category {
  flex-grow: 1;
}

.skill-proficiency {
  width: 100%;
}

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

.skill-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-md);
}

.skill-icon img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  transition: var(--transition-fast);
}

.skill-icon i {
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.85);
  transition: var(--transition-fast);
}

.skill-card:hover .skill-icon img {
  opacity: 1;
  filter: none;
}

.skill-card:hover .skill-icon i {
  color: var(--color-accent-primary);
}

.skill-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.skill-category {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

/* skill proficiency section */

.skill-level-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

/* Level badge colors */
.skill-level-badge.expert {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(6, 182, 212, 0.3));
  color: #fff;
  border: 1px solid rgba(139, 92, 246, 0.5);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.3);
}

.skill-level-badge.advanced {
  background: rgba(139, 92, 246, 0.2);
  color: #a78bfa;
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.skill-level-badge.intermediate {
  background: rgba(6, 182, 212, 0.2);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.4);
}

.skill-level-badge.beginner {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.skill-level-badge.elementary {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

/* Progress bar */
.skill-progress {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.skill-progress-bar {
  width: var(--progress, 0%);
  height: 100%;
  border-radius: var(--border-radius-full);
  transition: width 1s ease-out;
}

/* Progress bar colors by level */
.skill-card[data-level="expert"] .skill-progress-bar {
  background: linear-gradient(90deg, #8b5cf6, #06b6d4);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.skill-card[data-level="advanced"] .skill-progress-bar {
  background: linear-gradient(90deg, #8b5cf6, #a78bfa);
  box-shadow: 0 0 8px rgba(139, 92, 246, 0.4);
}

.skill-card[data-level="intermediate"] .skill-progress-bar {
  background: linear-gradient(90deg, #0891b2, #22d3ee);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

.skill-card[data-level="beginner"] .skill-progress-bar {
  background: rgba(255, 255, 255, 0.3);
}

.skill-card[data-level="elementary"] .skill-progress-bar {
  background: linear-gradient(90deg, #10b981, #34d399);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

/* ===================================
   お問い合わせ / フッター
   =================================== */
.footer {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}

.footer-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

.footer-link:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ===================================
   アニメーション
   =================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
   レスポンシブデザイン
   =================================== */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--color-bg-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 30px;
    transition: var(--transition-normal);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image-wrapper {
    max-width: 300px;
    margin: 0 auto;
  }

  .about-info {
    grid-template-columns: 1fr;
  }

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

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

  .footer-links {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
  }

  .footer-link {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   プロジェクトモーダル
   =================================== */

/* Work card clickable */
.work-card[data-project-id] {
  cursor: pointer;
}

/* Modal container */
.project-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.project-modal.active {
  opacity: 1;
  visibility: visible;
}

/* Overlay */
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}

/* Modal content */
.modal-content {
  position: relative;
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform 0.2s ease;
}

.project-modal.active .modal-content {
  transform: scale(1) translateY(0);
}

/* Close button */
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
  width: 40px;
  height: 40px;
  background: var(--color-bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

/* Gallery */
.modal-gallery {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-bg-primary);
}

.gallery-container {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.gallery-slides {
  display: flex;
  height: 100%;
  transition: transform var(--transition-normal);
}

.gallery-slide {
  min-width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.gallery-slide iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.gallery-slide-placeholder {
  font-size: 4rem;
  color: var(--color-text-muted);
}

/* Gallery navigation */
.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  background: var(--color-bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--color-text-primary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  opacity: 0.8;
}

.gallery-nav:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  opacity: 1;
}

.gallery-prev {
  left: 16px;
}

.gallery-next {
  right: 16px;
}

/* Gallery dots */
.gallery-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.gallery-dot {
  width: 10px;
  height: 10px;
  background: var(--color-text-muted);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
}

.gallery-dot.active {
  background: var(--color-accent-primary);
  box-shadow: 0 0 10px var(--color-accent-primary);
}

/* Modal body */
.modal-body {
  padding: 32px;
}

.modal-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}

/* Modal meta info */
.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

.modal-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.modal-meta-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.modal-meta-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.modal-description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.modal-tag {
  padding: 6px 14px;
  background: var(--color-bg-glass);
  border-radius: var(--border-radius-full);
  font-size: 0.8rem;
  color: var(--color-accent-primary);
  border: 1px solid var(--color-accent-primary);
}

.modal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.modal-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--color-bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.modal-link:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

.modal-link.primary {
  background: var(--color-accent-gradient);
  border: none;
}

.modal-link.primary:hover {
  box-shadow: var(--shadow-glow);
}

/* Modal scroll prevention */
body.modal-open {
  overflow: hidden;
}

/* Responsive modal */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 95vh;
  }

  .modal-body {
    padding: 24px;
  }

  .modal-title {
    font-size: 1.5rem;
  }

  .modal-meta {
    gap: 16px;
  }

  .gallery-nav {
    width: 36px;
    height: 36px;
  }

  .gallery-prev {
    left: 8px;
  }

  .gallery-next {
    right: 8px;
  }
}