/* Zentaro Digital Group — Editorial Bento & Swiss Grid Design System (.zdg-*) */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400..700;1,9..40,400..700&family=IBM+Plex+Mono:wght@400;500;600&family=Noto+Sans+JP:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --zdg-bg-canvas: #faf9f6;
  --zdg-bg-surface: #ffffff;
  --zdg-bg-subtle: #f3f1ed;
  --zdg-bg-tint: #eef1ff;
  --zdg-ink-primary: #181318;
  --zdg-ink-secondary: #5c5059;
  --zdg-ink-muted: #847781;
  --zdg-cobalt: #161cdd;
  --zdg-cobalt-dark: #0a2075;
  --zdg-cobalt-soft: rgba(22, 28, 221, 0.08);
  --zdg-teal: #0f766e;
  --zdg-amber: #b45309;
  --zdg-border: rgba(24, 19, 24, 0.11);
  --zdg-border-strong: rgba(24, 19, 24, 0.22);
  --zdg-radius-sm: 8px;
  --zdg-radius-md: 16px;
  --zdg-radius-lg: 24px;
  --zdg-shadow-card: 0 2px 6px rgba(24, 19, 24, 0.04), 0 14px 34px rgba(24, 19, 24, 0.06);
  --zdg-shadow-hover: 0 4px 12px rgba(22, 28, 221, 0.08), 0 22px 48px rgba(24, 19, 24, 0.11);
  --zdg-font-sans: 'DM Sans', 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --zdg-font-display: 'Space Grotesk', 'Noto Sans JP', sans-serif;
  --zdg-font-mono: 'IBM Plex Mono', monospace;
}

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

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

body.zdg-body {
  background-color: var(--zdg-bg-canvas);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(22, 28, 221, 0.045), transparent 36%),
    radial-gradient(circle at 88% 18%, rgba(15, 118, 110, 0.04), transparent 38%);
  color: var(--zdg-ink-primary);
  font-family: var(--zdg-font-sans);
  line-height: 1.82;
  -webkit-font-smoothing: antialiased;
}

a.zdg-link {
  color: var(--zdg-cobalt);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a.zdg-link:hover {
  color: var(--zdg-cobalt-dark);
}

.zdg-shell {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Status Ribbon */
.zdg-topbar {
  background: var(--zdg-ink-primary);
  color: #f7f6f2;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.zdg-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  flex-wrap: wrap;
}

.zdg-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--zdg-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: #e2e8f0;
}

.zdg-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.22);
}

.zdg-topbar-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.78rem;
  color: #cbd5e1;
  flex-wrap: wrap;
}

/* Header & Navigation */
.zdg-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 249, 246, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--zdg-border);
}

.zdg-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 74px;
  flex-wrap: wrap;
}

.zdg-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--zdg-ink-primary);
}

.zdg-brand-emblem {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--zdg-cobalt);
  color: #ffffff;
  display: grid;
  place-items: center;
  font-family: var(--zdg-font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
  box-shadow: 0 6px 16px rgba(22, 28, 221, 0.24);
}

.zdg-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.zdg-brand-title {
  font-family: var(--zdg-font-display);
  font-weight: 700;
  font-size: 1.04rem;
  letter-spacing: -0.02em;
}

.zdg-brand-sub {
  font-size: 0.72rem;
  color: var(--zdg-ink-secondary);
  font-family: var(--zdg-font-mono);
}

.zdg-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.zdg-nav-item {
  padding: 8px 13px;
  border-radius: var(--zdg-radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--zdg-ink-secondary);
  text-decoration: none;
  transition: all 0.18s ease;
}

.zdg-nav-item:hover,
.zdg-nav-item.zdg-active {
  color: var(--zdg-cobalt);
  background: var(--zdg-cobalt-soft);
}

/* Sub-navigation Index Strip */
.zdg-index-strip {
  border-bottom: 1px solid var(--zdg-border);
  background: var(--zdg-bg-surface);
}

.zdg-index-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  font-size: 0.8rem;
  color: var(--zdg-ink-secondary);
  overflow-x: auto;
}

.zdg-index-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.zdg-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--zdg-bg-subtle);
  color: var(--zdg-ink-primary);
  border: 1px solid var(--zdg-border);
  text-decoration: none;
}

.zdg-chip-cobalt {
  background: var(--zdg-cobalt-soft);
  color: var(--zdg-cobalt);
  border-color: rgba(22, 28, 221, 0.22);
}

/* Hero Editorial Section */
.zdg-hero {
  padding: 52px 0 42px;
}

.zdg-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: stretch;
}

.zdg-hero-panel {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-lg);
  padding: 40px;
  box-shadow: var(--zdg-shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.zdg-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--zdg-font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--zdg-cobalt);
  margin-bottom: 16px;
}

.zdg-h1 {
  font-family: var(--zdg-font-display);
  font-size: clamp(1.85rem, 3.1vw, 2.65rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--zdg-ink-primary);
  margin-bottom: 18px;
}

.zdg-lead {
  font-size: 1.02rem;
  color: var(--zdg-ink-secondary);
  margin-bottom: 26px;
}

.zdg-btn-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.zdg-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  background: var(--zdg-cobalt);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid var(--zdg-cobalt);
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  cursor: pointer;
}

.zdg-btn-primary:hover {
  background: var(--zdg-cobalt-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(22, 28, 221, 0.22);
}

.zdg-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  background: var(--zdg-bg-subtle);
  color: var(--zdg-ink-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid var(--zdg-border);
  transition: all 0.18s ease;
}

.zdg-btn-ghost:hover {
  border-color: var(--zdg-cobalt);
  color: var(--zdg-cobalt);
}

.zdg-hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--zdg-border);
}

.zdg-stat-box {
  background: var(--zdg-bg-canvas);
  border: 1px solid var(--zdg-border);
  border-radius: 12px;
  padding: 13px 15px;
}

.zdg-stat-num {
  font-family: var(--zdg-font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--zdg-cobalt-dark);
  line-height: 1.2;
}

.zdg-stat-label {
  font-size: 0.76rem;
  color: var(--zdg-ink-secondary);
  margin-top: 4px;
}

.zdg-hero-visual {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-lg);
  overflow: hidden;
  box-shadow: var(--zdg-shadow-card);
  display: flex;
  flex-direction: column;
}

.zdg-hero-img-wrap {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0f172a;
}

.zdg-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.zdg-hero-caption {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  justify-content: space-between;
}

.zdg-mono-tag {
  font-family: var(--zdg-font-mono);
  font-size: 0.74rem;
  color: var(--zdg-cobalt);
  letter-spacing: 0.03em;
}

/* Section Headers */
.zdg-section {
  padding: 44px 0;
}

.zdg-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
  flex-wrap: wrap;
}

.zdg-h2 {
  font-family: var(--zdg-font-display);
  font-size: clamp(1.4rem, 2.3vw, 1.9rem);
  color: var(--zdg-ink-primary);
  letter-spacing: -0.015em;
  line-height: 1.32;
}

.zdg-sublead {
  font-size: 0.94rem;
  color: var(--zdg-ink-secondary);
  max-width: 680px;
}

/* Bento Cards & Numbered Modules (N° 01..05) */
.zdg-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.zdg-bento-card {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-md);
  padding: 28px;
  box-shadow: var(--zdg-shadow-card);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.zdg-bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--zdg-shadow-hover);
  border-color: rgba(22, 28, 221, 0.3);
}

.zdg-num-badge {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--zdg-font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--zdg-cobalt);
  background: var(--zdg-cobalt-soft);
  padding: 4px 10px;
  border-radius: 6px;
  width: fit-content;
  margin-bottom: 14px;
}

.zdg-h3 {
  font-family: var(--zdg-font-display);
  font-size: 1.18rem;
  color: var(--zdg-ink-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.zdg-card-text {
  font-size: 0.92rem;
  color: var(--zdg-ink-secondary);
  margin-bottom: 18px;
}

.zdg-card-foot {
  padding-top: 14px;
  border-top: 1px dashed var(--zdg-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
}

/* Interactive Simulator Workbench */
.zdg-workbench {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border-strong);
  border-radius: var(--zdg-radius-lg);
  padding: 36px;
  box-shadow: var(--zdg-shadow-card);
}

.zdg-sim-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  margin-top: 22px;
}

.zdg-control-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: var(--zdg-bg-canvas);
  padding: 24px;
  border-radius: var(--zdg-radius-md);
  border: 1px solid var(--zdg-border);
}

.zdg-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.zdg-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--zdg-ink-primary);
}

.zdg-val-pill {
  font-family: var(--zdg-font-mono);
  font-size: 0.82rem;
  color: var(--zdg-cobalt);
  background: var(--zdg-cobalt-soft);
  padding: 2px 9px;
  border-radius: 6px;
}

.zdg-range {
  width: 100%;
  accent-color: var(--zdg-cobalt);
  cursor: pointer;
}

.zdg-select, .zdg-input, .zdg-textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--zdg-border-strong);
  background: #ffffff;
  color: var(--zdg-ink-primary);
  font-family: var(--zdg-font-sans);
  font-size: 0.92rem;
}

.zdg-select:focus, .zdg-input:focus, .zdg-textarea:focus {
  outline: 2px solid rgba(22, 28, 221, 0.25);
  border-color: var(--zdg-cobalt);
}

.zdg-output-panel {
  background: #111625;
  color: #f8fafc;
  border-radius: var(--zdg-radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.zdg-kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.zdg-kpi-tile {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 14px;
}

.zdg-kpi-val {
  font-family: var(--zdg-font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: #60a5fa;
}

.zdg-kpi-caption {
  font-size: 0.75rem;
  color: #cbd5e1;
  margin-top: 4px;
}

.zdg-bar-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zdg-bar-track {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  display: flex;
}

.zdg-bar-seg-deep {
  background: #38bdf8;
  height: 100%;
  transition: width 0.25s ease;
}

.zdg-bar-seg-auto {
  background: #34d399;
  height: 100%;
  transition: width 0.25s ease;
}

.zdg-bar-seg-overhead {
  background: #f59e0b;
  height: 100%;
  transition: width 0.25s ease;
}

/* Spec Matrix (N° 01 .. N° 04 Non-commercial Technical Benchmarks) */
.zdg-spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.zdg-spec-card {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-md);
  padding: 24px;
  box-shadow: var(--zdg-shadow-card);
}

.zdg-spec-metric {
  font-family: var(--zdg-font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--zdg-cobalt-dark);
  margin: 8px 0 4px;
}

/* Media Showcase Cards */
.zdg-media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.zdg-media-card {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-md);
  overflow: hidden;
  box-shadow: var(--zdg-shadow-card);
  display: flex;
  flex-direction: column;
}

.zdg-media-thumb {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-bottom: 1px solid var(--zdg-border);
}

.zdg-media-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
}

/* Article Layout */
.zdg-article-wrap {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 32px;
  padding: 42px 0;
}

.zdg-article-main {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-lg);
  padding: 42px;
  box-shadow: var(--zdg-shadow-card);
}

.zdg-article-main h2 {
  font-family: var(--zdg-font-display);
  font-size: 1.42rem;
  color: var(--zdg-ink-primary);
  margin: 32px 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--zdg-bg-tint);
}

.zdg-article-main h3 {
  font-size: 1.12rem;
  color: var(--zdg-cobalt-dark);
  margin: 22px 0 10px;
}

.zdg-article-main p {
  margin-bottom: 16px;
  color: var(--zdg-ink-secondary);
}

.zdg-article-main ul, .zdg-article-main ol {
  margin: 0 0 18px 22px;
  color: var(--zdg-ink-secondary);
}

.zdg-article-main li {
  margin-bottom: 8px;
}

.zdg-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
}

.zdg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.zdg-table th, .zdg-table td {
  padding: 12px 14px;
  border: 1px solid var(--zdg-border);
  text-align: left;
}

.zdg-table th {
  background: var(--zdg-bg-subtle);
  font-weight: 700;
  color: var(--zdg-ink-primary);
}

.zdg-callout {
  background: var(--zdg-bg-tint);
  border-left: 4px solid var(--zdg-cobalt);
  padding: 18px 20px;
  border-radius: 0 12px 12px 0;
  margin: 22px 0;
  font-size: 0.92rem;
}

.zdg-aside-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.zdg-aside-box {
  background: var(--zdg-bg-surface);
  border: 1px solid var(--zdg-border);
  border-radius: var(--zdg-radius-md);
  padding: 24px;
  box-shadow: var(--zdg-shadow-card);
}

/* Footer */
.zdg-footer {
  background: #141115;
  color: #d6d1d5;
  padding: 56px 0 36px;
  margin-top: 56px;
  border-top: 1px solid var(--zdg-border);
}

.zdg-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.zdg-footer-title {
  font-family: var(--zdg-font-display);
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 14px;
}

.zdg-footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.86rem;
}

.zdg-footer-list a {
  color: #cbd5e1;
  text-decoration: none;
}

.zdg-footer-list a:hover {
  color: #ffffff;
}

.zdg-footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #94a3b8;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 980px) {
  .zdg-hero-grid,
  .zdg-sim-grid,
  .zdg-article-wrap,
  .zdg-bento-grid,
  .zdg-media-grid,
  .zdg-spec-grid,
  .zdg-footer-grid {
    grid-template-columns: 1fr;
  }
  .zdg-hero-metrics,
  .zdg-kpi-row {
    grid-template-columns: 1fr;
  }
}