/* ==================== CSS Variables ==================== */
:root {
  /* Colors */
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-hover: #1a1a25;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #707080;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --accent-glow: rgba(0, 212, 255, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --gradient-cyber: linear-gradient(135deg, #00d4ff 0%, #7b2cbf 100%);
  --error: #ff4757;
  --success: #2ed573;
  
  /* Typography Scale (反復) */
  --font-base: 1rem;      /* 16px */
  --font-sm: 0.875rem;    /* 14px */
  --font-xs: 0.75rem;     /* 12px */
  --font-lg: 1.125rem;    /* 18px */
  --font-xl: 1.25rem;     /* 20px */
  --font-2xl: 1.5rem;     /* 24px */
  --font-3xl: 2rem;       /* 32px */
  --font-4xl: 2.5rem;     /* 40px */
  
  /* Spacing Scale (近接・反復) */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  
  /* Line Height (可読性) */
  --leading-tight: 1.25;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;
  --leading-loose: 2;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 300;
  overflow-x: hidden;
}

#app { position: relative; z-index: 1; min-height: 100vh; }

/* ==================== Background Effects ==================== */
#cyber-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

.cyber-grid {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.cyber-glow {
  position: fixed;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.glow-1 { top: -200px; right: -100px; background: var(--accent); }
.glow-2 { bottom: -200px; left: -100px; background: #7b2cbf; }

/* ==================== Animations ==================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 40px var(--accent-glow), 0 0 60px var(--accent-dim); }
}

@keyframes borderGlow {
  0%, 100% { border-color: rgba(0, 212, 255, 0.3); }
  50% { border-color: rgba(0, 212, 255, 0.6); }
}

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

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

.fade-in { opacity: 0; animation: fadeIn 0.8s ease-out forwards; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* ==================== Navigation ==================== */
nav, .admin-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-left, .nav-right { display: flex; align-items: center; gap: 1rem; }

.logo {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

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

.nav-links { display: flex; gap: 2.5rem; list-style: none; }

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.admin-badge {
  font-size: 0.6rem;
  color: var(--accent);
  padding: 0.2rem 0.5rem;
  background: var(--accent-dim);
  border-radius: 100px;
  letter-spacing: 0.1em;
}

.user-info { font-size: 0.85rem; color: var(--text-secondary); }

.btn-logout {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  font-family: inherit;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
}

.btn-logout:hover { border-color: var(--error); color: var(--error); }

/* ==================== Hamburger Menu ==================== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px; height: 24px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%; height: 1.5px;
  background: var(--accent);
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 57px; left: 0; right: 0;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem;
  z-index: 99;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  pointer-events: none;
}

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

.mobile-menu a {
  display: block;
  padding: 0.75rem 0;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s ease;
}

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--accent); }

/* ==================== Hero Section ==================== */
.hero {
  min-height: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  padding: 100px 3rem 50px;
  position: relative;
  z-index: 1;
}

.hero-content { max-width: 550px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 100px;
  font-size: 0.7rem;
  color: var(--accent);
  margin-bottom: 1rem;
  animation: borderGlow 3s ease-in-out infinite;
}

.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: glowPulse 2s ease-in-out infinite;
}

.hero-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.25rem;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.hero-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.85rem;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s ease;
  font-weight: 400;
}

.hero-link.primary { background: var(--gradient-cyber); color: var(--bg-dark); }
.hero-link.primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-glow); }
.hero-link.secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border); }
.hero-link.secondary:hover { border-color: var(--accent); color: var(--accent); }

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

.hero-image-wrapper {
  position: relative;
  width: 100%; max-width: 350px;
  aspect-ratio: 1;
  animation: float 6s ease-in-out infinite;
}

.hero-image {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid var(--border);
  filter: saturate(0.8);
}

.hero-image-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 80%; height: 80%;
  background: var(--gradient-cyber);
  filter: blur(80px);
  opacity: 0.3;
  z-index: -1;
  border-radius: 50%;
}

.hero-image-border {
  position: absolute;
  top: -2px; left: -2px; right: -2px; bottom: -2px;
  border-radius: 22px;
  background: var(--gradient-cyber);
  z-index: -1;
  opacity: 0.5;
}

/* ==================== Section Styles (反復・整列) ==================== */
section {
  padding: var(--space-3xl) var(--space-2xl);
  position: relative;
  z-index: 1;
}

/* 近接：セクションヘッダーをまとめる */
.section-header { 
  margin-bottom: var(--space-2xl);
}

/* 反復：ラベルのスタイルを統一 */
.section-label {
  display: inline-block;
  font-size: var(--font-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

/* 対比：セクションタイトルを強調 */
.section-title {
  font-size: var(--font-2xl);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
}

/* ==================== About Section (近接・可読性) ==================== */
.about-section {
  background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  align-items: center;
  max-width: 1000px;
}

.about-image-wrapper { position: relative; }

.about-image {
  width: 100%; height: 280px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  filter: saturate(0.7) brightness(0.9);
}

.about-image-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 44, 191, 0.1) 100%);
  border-radius: 12px;
  pointer-events: none;
}

/* 近接：コンテンツ要素をグループ化 */
.about-content { 
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* 可読性：テキストを読みやすく */
.about-text { 
  font-size: var(--font-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* 対比：引用を強調 */
.about-quote {
  padding: var(--space-lg);
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: var(--font-base);
  color: var(--text-primary);
  line-height: var(--leading-relaxed);
  font-style: italic;
}

/* 整列：統計情報を揃える */
.about-stats {
  display: flex;
  gap: var(--space-3xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

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

/* 対比：数値を目立たせる */
.stat-number {
  font-size: var(--font-3xl);
  font-weight: 700;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xs);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-xs);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ==================== Skills Section ==================== */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: 900px;
}

.skill-tag {
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: all 0.3s ease;
  cursor: default;
}

.skill-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* ==================== Expertise Section ==================== */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  max-width: 1000px;
}

.expertise-item {
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.expertise-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-cyber);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.expertise-item:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.expertise-item:hover::before { opacity: 1; }

.expertise-icon { font-size: 1.25rem; margin-bottom: 0.75rem; }
.expertise-title { font-size: 0.85rem; font-weight: 500; margin-bottom: 0.35rem; color: var(--text-primary); }
.expertise-desc { font-size: 0.7rem; color: var(--text-secondary); line-height: 1.6; }

/* ==================== Works Section ==================== */
.works-section {
  background: linear-gradient(180deg, transparent 0%, rgba(123, 44, 191, 0.03) 50%, transparent 100%);
}

.works-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.5rem;
}

.works-more {
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.works-more:hover { gap: 0.75rem; }

.works-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  max-width: 1000px;
}

.works-image-wrapper {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
}

.works-image {
  width: 100%; height: 100%;
  min-height: 300px;
  object-fit: cover;
  filter: saturate(0.6) brightness(0.7);
  transition: all 0.5s ease;
}

.works-image-wrapper:hover .works-image {
  filter: saturate(0.8) brightness(0.8);
  transform: scale(1.05);
}

.works-image-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 15, 0.9) 100%);
  pointer-events: none;
}

.works-image-text {
  position: absolute;
  bottom: 1.5rem; left: 1.5rem; right: 1.5rem;
  color: var(--text-primary);
}

.works-image-text h3 { font-size: 1rem; font-weight: 500; margin-bottom: 0.35rem; }
.works-image-text p { font-size: 0.75rem; color: var(--text-secondary); }

.works-grid { display: flex; flex-direction: column; gap: 0.75rem; }

.work-item {
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  display: block;
}

.work-item:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateX(8px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.work-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.work-category {
  font-size: 0.6rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  background: var(--accent-dim);
  border-radius: 100px;
}

.work-date { font-size: 0.65rem; color: var(--text-secondary); }

.work-title {
  font-size: 0.8rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-primary);
}

/* ==================== Contact Section ==================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 800px;
}

.contact-text { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.8; }

.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: all 0.3s ease;
}

.contact-link:hover { border-color: var(--accent); transform: translateX(8px); }

.contact-link span {
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  width: 3rem;
}

/* ==================== Footer ==================== */
footer {
  padding: 1.5rem 3rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

footer p, footer a { font-size: 0.75rem; color: var(--text-secondary); }
footer a { text-decoration: none; transition: color 0.3s ease; }
footer a:hover { color: var(--accent); }

/* ==================== Blog Styles (近接・整列) ==================== */
.blog-main {
  max-width: 760px; /* 可読性のため幅を狭く */
  margin: 0 auto;
  padding: 100px var(--space-xl) var(--space-3xl);
  position: relative;
  z-index: 1;
}

.blog-header { 
  margin-bottom: var(--space-3xl);
  text-align: center;
}

.blog-header .section-label {
  margin-bottom: var(--space-sm);
}

.blog-header .section-title {
  font-size: var(--font-3xl);
  margin-bottom: var(--space-md);
  line-height: var(--leading-tight);
}

.blog-desc { 
  color: var(--text-secondary);
  font-size: var(--font-base);
  line-height: var(--leading-relaxed);
  max-width: 600px;
  margin: 0 auto;
}

.featured { margin-bottom: 2rem; }

/* 近接・整列・対比を適用 */
.post-card {
  display: block;
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  margin-bottom: var(--space-lg);
}

.post-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.post-card.featured-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 212, 255, 0.05) 100%);
  border-color: rgba(0, 212, 255, 0.2);
  padding: var(--space-2xl);
}

/* 対比：Featured バッジを目立たせる */
.post-card .badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--gradient-cyber);
  color: var(--bg-dark);
  font-size: var(--font-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

/* 近接：メタ情報をグループ化 */
.post-card .meta {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  font-size: var(--font-sm);
  letter-spacing: 0.02em;
}

.post-card .date { color: var(--text-muted); }
.post-card .category { 
  color: var(--accent);
  font-weight: 500;
}

/* 対比：タイトルを大きく見やすく */
.post-card h2 {
  font-size: var(--font-xl);
  font-weight: 600;
  margin-bottom: var(--space-md);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.post-card.featured-card h2 {
  font-size: var(--font-2xl);
}

/* 可読性：抜粋テキストを読みやすく */
.post-card .excerpt {
  font-size: var(--font-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
}

/* 近接：タグをグループ化 */
.post-card .tags { 
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag {
  font-size: var(--font-xs);
  color: var(--text-muted);
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all 0.2s;
}

.tag:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* 整列：記事リストを統一 */
.posts-list { 
  display: flex;
  flex-direction: column;
}

.featured {
  margin-bottom: var(--space-2xl);
}

/* ==================== Article Styles (可読性最優先) ==================== */
.article { 
  max-width: 680px; /* より読みやすい幅 */
  margin: 0 auto;
}

/* 近接：ヘッダー要素をグループ化 */
.article-header { 
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--accent);
  text-decoration: none;
  font-size: var(--font-sm);
  margin-bottom: var(--space-xl);
  transition: all 0.3s;
  font-weight: 500;
}

.back-link:hover { 
  opacity: 0.8;
  transform: translateX(-4px);
}

/* 近接：メタ情報をまとめる */
.article-header .meta {
  margin-bottom: var(--space-lg);
}

/* 対比：タイトルを強調 */
.article-header h1 {
  font-size: var(--font-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

/* リード文を読みやすく */
.article-header .lead {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

/* 可読性：本文を大きく、行間広く */
.content {
  font-size: var(--font-lg);
  line-height: var(--leading-loose);
  color: var(--text-primary);
  font-weight: 300;
}

/* 対比：見出しの階層を明確に */
.content h1, .content h2, .content h3 {
  margin: var(--space-3xl) 0 var(--space-lg);
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.content h1 { font-size: var(--font-2xl); }
.content h2 { font-size: var(--font-xl); }
.content h3 { font-size: var(--font-lg); font-weight: 500; }

/* 近接：段落間隔を統一 */
.content p { 
  margin-bottom: var(--space-xl);
}

/* 対比：リンクを目立たせる */
.content a { 
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.2s;
}

.content a:hover {
  border-bottom-color: var(--accent);
}

/* コードの可読性向上 */
.content code {
  background: var(--bg-card);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--border);
  font-family: 'Courier New', monospace;
}

/* 引用の強調 */
.content blockquote {
  margin: var(--space-2xl) 0;
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: var(--font-base);
  line-height: var(--leading-relaxed);
}

/* リストの可読性向上 */
.content ul, .content ol {
  margin: var(--space-xl) 0;
  padding-left: var(--space-2xl);
}

.content li { 
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
}

.article-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.share { text-align: center; }
.share-title { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 1rem; }

.share-buttons { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }

.share-btn {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.3s;
}

.share-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ==================== Admin Styles ==================== */
.admin-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 2rem 3rem;
  position: relative;
  z-index: 1;
}

.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 1.5rem; font-weight: 500; margin-bottom: 0.25rem; }
.page-header p { color: var(--text-secondary); font-size: 0.85rem; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
}

.stat-card .label { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.25rem; }
.stat-card .value { font-size: 2rem; font-weight: 600; color: var(--accent); }

.actions { display: flex; gap: 1rem; margin-bottom: 2rem; }

.btn-primary, .btn-secondary {
  padding: 0.75rem 1.5rem;
  font-size: 0.85rem;
  font-family: inherit;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-cyber);
  color: var(--bg-dark);
  border: none;
  font-weight: 500;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-glow); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

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

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.posts-section h2 { font-size: 1rem; font-weight: 500; margin-bottom: 1rem; }

.admin-posts-list { display: flex; flex-direction: column; gap: 0.75rem; }

.admin-post-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.3s;
}

.admin-post-item:hover { border-color: rgba(0, 212, 255, 0.2); }

.post-info h3 { font-size: 0.9rem; font-weight: 400; margin-bottom: 0.25rem; }

.post-info .meta {
  display: flex;
  gap: 0.75rem;
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.post-info .status {
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
}

.post-info .status.published { background: rgba(46, 213, 115, 0.2); color: var(--success); }
.post-info .status.draft { background: rgba(255, 71, 87, 0.2); color: var(--error); }

.post-actions { display: flex; gap: 0.5rem; }

.btn-icon {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.85rem;
}

.btn-icon:hover { border-color: var(--accent); }
.btn-icon.delete:hover { border-color: var(--error); }

/* ==================== Editor Styles ==================== */
.editor-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 100px 2rem 3rem;
  position: relative;
  z-index: 1;
}

.editor-header { margin-bottom: 1.5rem; }
.editor-header h1 { font-size: 1.25rem; font-weight: 500; }

.editor-msg {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: none;
}

.editor-msg:not(:empty) { display: block; }
.editor-msg.success { background: rgba(46, 213, 115, 0.2); color: var(--success); }
.editor-msg.error { background: rgba(255, 71, 87, 0.2); color: var(--error); }

.editor-form { display: flex; flex-direction: column; gap: 1rem; }

.form-row { display: flex; gap: 1rem; }
.form-row.options { align-items: center; justify-content: space-between; }

.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group.flex-1 { flex: 1; }

.form-group label { font-size: 0.75rem; color: var(--text-secondary); }

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.3s;
}

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

.form-group textarea { resize: vertical; min-height: 100px; }

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.checkbox input { width: 16px; height: 16px; cursor: pointer; }

.form-actions { display: flex; gap: 1rem; justify-content: flex-end; margin-top: 1rem; }

/* ==================== Login Page ==================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  position: relative;
  z-index: 1;
}

.login-box {
  width: 100%;
  max-width: 400px;
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.login-header { text-align: center; margin-bottom: 2rem; }
.login-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.login-header h1 { font-size: 1.25rem; font-weight: 500; margin-bottom: 0.25rem; }
.login-header p { font-size: 0.8rem; color: var(--text-secondary); }

.login-box .form-group { margin-bottom: 1rem; }

.error-msg {
  color: var(--error);
  font-size: 0.8rem;
  margin-bottom: 1rem;
  text-align: center;
}

.remember {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

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

.login-box .back-link {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.8rem;
}

/* ==================== 404 Page ==================== */
.page-404 {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  margin-top: 60px;
}

.page-404 h1 {
  font-size: 5rem;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.page-404 p { color: var(--text-secondary); margin-bottom: 2rem; }
.page-404 a { color: var(--accent); text-decoration: none; }

/* ==================== Loading & Toast ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
}

.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
}

.error {
  text-align: center;
  padding: 2rem;
  color: var(--error);
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.85rem;
  opacity: 0;
  transition: all 0.3s;
  z-index: 1000;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; }
  .hero-visual { order: -1; }
  .hero-image-wrapper { max-width: 280px; }
  .about-container { grid-template-columns: 1fr; gap: 1.5rem; }
  .about-image { height: 220px; }
  .works-container { grid-template-columns: 1fr; }
  .works-image { min-height: 200px; }
}

@media (max-width: 900px) {
  nav, .admin-nav { padding: 0.75rem 1.5rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }
  .hero { padding: 80px 1.5rem 30px; }
  .hero-title { font-size: 2.25rem; }
  section { padding: 1.75rem 1.5rem; }
  .about-stats { gap: 1.5rem; }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  footer { padding: 1.25rem; flex-direction: column; gap: 0.35rem; }
  .blog-main, .admin-main, .editor-main { padding: 80px 1.5rem 2rem; }
}

@media (max-width: 600px) {
  .hero-title { font-size: 1.85rem; }
  .hero-links { flex-direction: column; gap: 0.75rem; }
  .hero-image-wrapper { max-width: 240px; }
  .expertise-grid { grid-template-columns: 1fr 1fr; }
  .about-stats { flex-wrap: wrap; justify-content: center; gap: 1.25rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .actions { flex-direction: column; }
  .tag-cloud { gap: 0.5rem; }
  .tag-cloud-item { padding: 0.4rem 0.7rem; font-size: 0.75rem; }
}

/* ==================== Tag Cloud Section ==================== */
.tag-cloud-section {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.tag-cloud-title {
  font-size: var(--font-base);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  background: var(--accent-dim);
  border: 1px solid transparent;
  border-radius: 20px;
  color: var(--accent);
  font-size: calc(var(--font-sm) * var(--tag-size, 1));
  font-weight: 400;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
}

.tag-cloud-item:hover {
  background: var(--accent);
  color: var(--bg-dark);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.tag-cloud-item.active {
  background: var(--accent);
  color: var(--bg-dark);
  border-color: var(--accent);
  font-weight: 500;
}

.tag-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4em;
  height: 1.4em;
  padding: 0 0.3em;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  font-size: 0.75em;
  font-weight: 500;
}

.tag-cloud-item:hover .tag-count,
.tag-cloud-item.active .tag-count {
  background: rgba(0, 0, 0, 0.3);
}

/* ==================== Clickable Tags ==================== */
.clickable-tag {
  cursor: pointer;
  transition: all 0.2s ease;
}

.clickable-tag:hover {
  background: var(--accent);
  color: var(--bg-dark);
  transform: translateY(-1px);
}

.clickable-tag.active {
  background: var(--accent);
  color: var(--bg-dark);
  font-weight: 500;
}

/* ==================== Tag Page Styles ==================== */
.back-to-blog {
  display: inline-block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-sm);
  margin-bottom: var(--space-md);
  transition: color 0.2s;
}

.back-to-blog:hover {
  color: var(--accent);
}

.tag-page-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.tag-icon {
  font-size: 0.9em;
}

/* Tag page responsive */
@media (max-width: 600px) {
  .tag-cloud-section {
    padding: var(--space-md);
    margin: var(--space-lg) 0;
  }
  
  .tag-page-title {
    font-size: var(--font-xl);
  }
}