/* ============================================
   ローファイ・レヴリー — Lo-fi Reverie Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=VT323&family=Courier+Prime:wght@400;700&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #252847;
  --bg-overlay: rgba(26, 26, 46, 0.85);
  --bg-header: rgba(26, 26, 46, 0.95);

  --color-primary: #eee3d3;
  --color-accent: #ff6b9d;
  --color-accent-secondary: #c44569;
  --color-accent-glow: #ff6b9d;
  --color-neon: #00d2d3;
  --color-neon-purple: #b794f6;
  --color-text: #f0f0f0;
  --color-text-secondary: #b8bdc8;
  --color-text-muted: #8a95a3;
  --color-border: #3a4565;
  --color-vhs-red: #ff4757;
  --color-vhs-blue: #5352ed;
  --color-retro-yellow: #ffa502;

  --font-mono: 'VT323', 'Courier Prime', monospace;
  --font-retro: 'Courier Prime', monospace;
  --font-sans: 'Noto Sans JP', sans-serif;

  --shadow-neon: 0 0 10px rgba(255, 107, 157, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 210, 211, 0.2);
  --shadow-card: 0 4px 15px rgba(0, 0, 0, 0.3);
  --shadow-deep: 0 8px 30px rgba(0, 0, 0, 0.4);

  --radius-retro: 4px;
  --radius-card: 8px;

  --transition: 0.3s ease;
  --max-width: 1200px;
  --content-width: 900px;
}

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

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

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ff6b9d' fill-opacity='0.03'%3E%3Cpath d='M30 30c0-6.627-5.373-12-12-12s-12 5.373-12 12 5.373 12 12 12 12-5.373 12-12zm12 0c0-6.627-5.373-12-12-12s-12 5.373-12 12 5.373 12 12 12 12-5.373 12-12z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: -1;
}

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

a:hover { 
  color: var(--color-accent); 
  text-shadow: var(--shadow-neon);
}

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

/* ---- Reading Progress ---- */
.reading-progress {
  position: fixed; 
  top: 0; left: 0;
  width: 0%; 
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-neon));
  z-index: 1000;
  transition: width 0.1s linear;
  box-shadow: var(--shadow-neon);
}

/* ---- Container ---- */
.container { 
  max-width: var(--max-width); 
  margin: 0 auto; 
  padding: 0 2rem; 
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--bg-header);
  backdrop-filter: blur(10px);
  z-index: 999;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  min-height: 70px;
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo-main {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--color-accent);
  text-shadow: var(--shadow-neon);
  letter-spacing: 2px;
}

.logo-sub {
  font-family: var(--font-retro);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  letter-spacing: 1px;
  margin-top: -2px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  max-width: 900px;
  justify-content: center;
}

.nav-item {
  font-family: var(--font-retro);
  font-weight: 500;
  color: var(--color-text);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-retro);
  transition: all var(--transition);
  font-size: 0.9rem;
  white-space: nowrap;
  border: 1px solid transparent;
}

.nav-item:hover,
.nav-item.active {
  color: var(--color-accent);
  background: rgba(255, 107, 157, 0.1);
  border-color: var(--color-accent);
  text-shadow: var(--shadow-neon);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--color-accent);
  margin: 3px 0;
  transition: var(--transition);
  box-shadow: var(--shadow-neon);
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4) contrast(1.2) saturate(1.3);
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(45deg, var(--bg-overlay) 0%, rgba(255, 107, 157, 0.1) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-text);
  padding: 2rem 0;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-accent);
  background: rgba(255, 107, 157, 0.1);
  border: 1px solid var(--color-accent);
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 1.5rem;
  text-shadow: var(--shadow-neon);
  box-shadow: var(--shadow-neon);
  letter-spacing: 2px;
}

.hero h1 {
  font-family: var(--font-retro);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: bold;
  margin-bottom: 1.5rem;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.hero h1 .accent {
  color: var(--color-accent);
  text-shadow: var(--shadow-neon);
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

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

.hero-stat-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--color-accent);
  display: block;
  text-shadow: var(--shadow-neon);
}

.hero-stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
}

/* ---- Sections ---- */
.section {
  padding: 4rem 0;
  position: relative;
}

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

.section-header h2 {
  font-family: var(--font-retro);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-accent);
  margin-bottom: 1rem;
  text-shadow: var(--shadow-neon);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Overview ---- */
.overview {
  background: var(--bg-card);
  border-top: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

.content-text p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ---- News Section ---- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.news-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}

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

.news-date {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  text-shadow: var(--shadow-neon);
}

.news-card h3 {
  font-size: 1.2rem;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.4;
}

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

/* ---- Topics Grid ---- */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.topic-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.topic-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-deep);
  border-color: var(--color-accent);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 107, 157, 0.05) 100%);
}

.topic-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  filter: grayscale(0.3) sepia(0.5) hue-rotate(300deg);
}

.topic-card h3 {
  font-size: 1.3rem;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.topic-card p {
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

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

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  font-family: var(--font-retro);
  color: var(--color-accent);
  margin-bottom: 1rem;
  text-shadow: var(--shadow-neon);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* ---- Article Layout ---- */
.page-header {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 70px;
  overflow: hidden;
}

.page-header-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: -1;
}

.page-header-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.3) contrast(1.2) saturate(1.1);
}

.page-header-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(45deg, var(--bg-overlay) 0%, rgba(255, 107, 157, 0.1) 100%);
}

.page-header-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-text);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.page-header h1 {
  font-family: var(--font-retro);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: bold;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.page-header p {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

.main-content {
  padding: 4rem 0;
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
}

.article-content {
  background: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.article-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.article-date,
.article-category {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-accent);
  background: rgba(255, 107, 157, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-retro);
  border: 1px solid var(--color-accent);
}

.content-section {
  margin-bottom: 3rem;
}

.content-section h2 {
  font-family: var(--font-retro);
  font-size: 1.8rem;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  text-shadow: var(--shadow-neon);
}

.content-section h3 {
  font-size: 1.3rem;
  color: var(--color-text);
  margin: 2rem 0 1rem 0;
  font-weight: 600;
}

.content-section p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 90px;
  height: fit-content;
}

.sidebar-section {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  margin-bottom: 1.5rem;
}

.sidebar-section h3 {
  font-family: var(--font-retro);
  color: var(--color-accent);
  font-size: 1.1rem;
  margin-bottom: 1rem;
  text-shadow: var(--shadow-neon);
}

.sidebar-section ul {
  list-style: none;
}

.sidebar-section li {
  margin-bottom: 0.8rem;
}

.sidebar-section a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
  line-height: 1.5;
}

.sidebar-section a:hover {
  color: var(--color-accent);
}

.toc a::before {
  content: "▶ ";
  color: var(--color-accent);
  margin-right: 0.5rem;
}

/* ---- Banner Styles ---- */
.amazon-banner,
.main-banner,
.sitenavi-banner {
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-retro);
  padding: 1rem;
  margin: 2rem 0;
  text-align: center;
  transition: all var(--transition);
}

.amazon-banner:hover,
.main-banner:hover,
.sitenavi-banner:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-neon);
}

.amazon-banner a,
.main-banner a,
.sitenavi-banner a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  text-decoration: none;
}

.sidebar-ad {
  margin-bottom: 1.5rem;
}

.sidebar-ad .amazon-banner,
.sidebar-ad .sitenavi-banner {
  margin: 0;
  padding: 1rem;
  font-size: 0.85rem;
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--bg-header);
    border-top: 1px solid var(--color-border);
    padding: 1rem;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: var(--shadow-deep);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .hero-stat {
    padding: 1rem;
  }
  
  .hero-stat-number {
    font-size: 2rem;
  }
  
  .news-grid,
  .topics-grid {
    grid-template-columns: 1fr;
  }
  
  .content-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .sidebar {
    position: static;
  }
  
  .article-content {
    padding: 1.5rem;
  }
  
  .page-header {
    min-height: 30vh;
  }
}

/* ===== Partner Page Styles ===== */
.partner-page-hero{padding-top:5rem;padding-bottom:4rem;background:linear-gradient(135deg,rgba(30,64,175,0.94) 0%,rgba(14,165,233,0.9) 100%);color:#fff;position:relative;overflow:hidden}
.partner-page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at top right,rgba(255,255,255,0.18),transparent 35%),radial-gradient(circle at bottom left,rgba(255,255,255,0.12),transparent 40%)}
.partner-page-hero .container,.partner-page-content .container{position:relative;z-index:1}
.partner-page-eyebrow{display:inline-block;margin-bottom:1rem;padding:.35rem .8rem;border-radius:999px;background:rgba(255,255,255,0.16);font-size:.875rem;font-weight:700;color:#fff}
.partner-page-title{font-size:clamp(1.75rem,5vw,3rem);line-height:1.15;margin-bottom:1.25rem;color:#fff}
.partner-page-lead{max-width:820px;font-size:1.125rem;color:rgba(255,255,255,0.92);line-height:1.7}
.partner-page-content{padding:4rem 0 5rem}
.partner-page-grid{display:grid;gap:2rem}
.partner-content-block{background:#fff;border:1px solid rgba(148,163,184,0.25);border-radius:1rem;padding:2rem;box-shadow:0 4px 6px -1px rgba(0,0,0,0.07)}
.partner-content-block h2{font-size:1.4rem;margin-bottom:1rem;color:#111827}
.partner-content-block h3{font-size:1.15rem;margin:1.5rem 0 .75rem;color:#1f2937}
.partner-content-block p{line-height:1.7;color:#374151}
.partner-content-block ul,.partner-content-block ol{padding-left:1.4rem;margin-top:.75rem;color:#374151}
.partner-content-block li{margin-bottom:.4rem;line-height:1.6}
.partner-highlight-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}
.partner-highlight-card{background:#f9fafb;border:1px solid #e5e7eb;border-radius:.75rem;padding:1.25rem}
.partner-highlight-card h3{margin-top:0;font-size:1.1rem;color:#1e3a8a}
.partner-cta-box{background:linear-gradient(135deg,#1e40af 0%,#0ea5e9 100%) !important;color:#fff !important}
.partner-cta-box h2{color:#fff !important}
.partner-cta-box p,.partner-cta-box li,.partner-note{color:rgba(255,255,255,0.9)}
.partner-cta-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.5rem}
.partner-cta-actions .btn{display:inline-flex;align-items:center;padding:.7rem 1.4rem;border-radius:.5rem;font-weight:600;text-decoration:none;transition:all .2s;font-size:.95rem}
.partner-cta-actions .btn-primary{background:#fff;color:#1e40af;border:2px solid transparent}
.partner-cta-actions .btn-primary:hover{background:#eff6ff}
.partner-cta-actions .btn-secondary{background:rgba(255,255,255,0.15);color:#fff;border:1.5px solid rgba(255,255,255,0.35)}
.partner-cta-actions .btn-secondary:hover{background:rgba(255,255,255,0.25)}
.partner-note{margin-top:1rem;font-size:.875rem}
nav.breadcrumb{padding:.6rem 0;background:#f8fafc;border-bottom:1px solid #e2e8f0}
nav.breadcrumb .container{max-width:1200px;margin:0 auto;padding:0 1rem}
.breadcrumb-list{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.25rem;align-items:center}
.breadcrumb-item{display:flex;align-items:center;font-size:.85rem;color:#64748b}
.breadcrumb-item:not(:last-child)::after{content:"›";margin:0 .5rem;color:#94a3b8}
.breadcrumb-item a{color:#3b82f6;text-decoration:none}
.breadcrumb-item a:hover{text-decoration:underline}
.breadcrumb-item.active{color:#1e293b;font-weight:500}
.glossary-link{color:#3b82f6;text-decoration:underline}
@media(max-width:640px){.partner-content-block{padding:1.25rem}.partner-page-hero{padding-top:3.5rem;padding-bottom:2.5rem}}