/* AIO Media LLC (AIO Media合同会社) Sovereign Institutional Stylesheet
   Craft floor: Public Sans + Noto Sans JP (2 families max), 3 body sizes (17px / 15px / 13px),
   flat tonal surfaces (#FFFFFF / #F3F5F8 / #0B1628), tabular numerals, zero decorative clutter. */

:root {
  --surface-canvas: #ffffff;
  --surface-muted: #f3f5f8;
  --surface-card: #f3f5f8;
  --surface-card-on-muted: #ffffff;
  --surface-navy: #0b1628;
  --surface-navy-elevated: #13233d;
  --ink-primary: #0f172a;
  --ink-secondary: #334155;
  --ink-caption: #475569;
  --ink-on-navy: #f8fafc;
  --ink-on-navy-muted: #cbd5e1;
  --accent-cobalt: #0f4c81;
  --accent-cobalt-hover: #0a365c;
  --accent-ice: #e8eff7;
  --table-rule: #dce2ea;
  --max-width: 1120px;
  --font-sans: "Public Sans", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink-primary);
  background-color: var(--surface-canvas);
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
}

.tabular {
  font-variant-numeric: tabular-nums;
}

a {
  color: var(--accent-cobalt);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 160ms ease-out, background-color 160ms ease-out;
}

a:hover {
  color: var(--accent-cobalt-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-cobalt);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-cobalt);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  z-index: 100;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header Navigation (Interface fragment marked data-ui) */
.site-header[data-ui] {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: #ffffff;
  border-bottom: 1px solid var(--table-rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  gap: 1.5rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--ink-primary);
}

.brand-link:hover {
  color: var(--ink-primary);
}

.brand-mark {
  width: 2.125rem;
  height: 2.125rem;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-ja {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-primary);
  white-space: nowrap;
}

.brand-en {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-caption);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.375rem 0;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent-cobalt);
}

.site-nav a.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.5rem 1.125rem;
  background-color: var(--surface-navy);
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
}

.site-nav a.nav-cta:hover {
  background-color: var(--accent-cobalt);
  color: #ffffff;
}

/* Opening Architectural Masthead */
.hero-band {
  background-color: var(--surface-navy);
  color: var(--ink-on-navy);
  padding: 5rem 0 4.5rem;
}

.hero-layout {
  max-width: 54rem;
}

.hero-band h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.375rem, 3.3vw, 2.75rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--ink-on-navy);
}

.hero-lead {
  margin: 0 0 2.5rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink-on-navy-muted);
  max-width: 48rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.25rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.875rem;
  padding: 0.625rem 1.5rem;
  background-color: var(--accent-cobalt);
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: #165e9e;
  color: #ffffff;
}

.btn-secondary-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.875rem;
  padding: 0.625rem 1.5rem;
  background-color: var(--surface-navy-elevated);
  color: var(--ink-on-navy);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
}

.btn-secondary-dark:hover {
  background-color: #1d3254;
  color: #ffffff;
}

.btn-secondary-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.5625rem 1.375rem;
  background-color: var(--accent-ice);
  color: var(--accent-cobalt);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
}

.btn-secondary-light:hover {
  background-color: #d6e4f2;
  color: var(--accent-cobalt-hover);
}

.registry-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.registry-tile {
  background-color: var(--surface-navy-elevated);
  padding: 1.25rem 1.375rem;
  border-radius: 6px;
}

.registry-term {
  display: block;
  font-size: 0.8125rem;
  color: var(--ink-on-navy-muted);
  margin-bottom: 0.25rem;
}

.registry-val {
  display: block;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink-on-navy);
}

.registry-val a {
  color: var(--ink-on-navy);
  text-decoration: underline;
}

/* Standard Sections */
.section-white {
  background-color: var(--surface-canvas);
  padding: 5rem 0;
}

.section-muted {
  background-color: var(--surface-muted);
  padding: 5rem 0;
}

.section-head {
  max-width: 48rem;
  margin-bottom: 2.75rem;
}

.section-head h2,
.legal-page-header h1 {
  margin: 0 0 0.875rem;
  font-size: clamp(1.5rem, 2.3vw, 1.875rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink-primary);
}

.section-lead {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink-secondary);
}

/* Business Pillars 2x2 Grid */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.pillar-card {
  background-color: var(--surface-card);
  padding: 2rem;
  border-radius: 6px;
}

.section-muted .pillar-card {
  background-color: var(--surface-card-on-muted);
}

.pillar-card h3 {
  margin: 0 0 0.875rem;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink-primary);
}

.pillar-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-secondary);
}

.pillar-disclaimer {
  margin-top: 0.875rem;
  padding: 0.75rem 1rem;
  background-color: #ffffff;
  border-radius: 4px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-primary);
}

/* Technical Credential & Architecture Layout */
.tech-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: stretch;
}

.credential-panel {
  background-color: var(--surface-card-on-muted);
  padding: 2.25rem;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.credential-panel h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.credential-panel p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--ink-secondary);
}

.standards-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.standard-item {
  background-color: var(--surface-card-on-muted);
  padding: 1.5rem 1.75rem;
  border-radius: 6px;
}

.standard-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.standard-item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-secondary);
}

/* Governance & Tier-1 Legal Shield */
.governance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.gov-card {
  background-color: var(--surface-card);
  padding: 1.75rem;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
}

.gov-card h3 {
  margin: 0 0 0.625rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.gov-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-secondary);
}

.legal-shield-box {
  background-color: var(--surface-navy);
  color: var(--ink-on-navy);
  padding: 1.75rem 2rem;
  border-radius: 6px;
}

.legal-shield-title {
  margin: 0 0 0.5rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--ink-on-navy);
}

.legal-shield-title a {
  color: #93c5fd;
}

.legal-shield-copy {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--ink-on-navy-muted);
}

/* Corporate Profile Table (Real semantic table) */
.corp-table-wrap {
  background-color: #ffffff;
  border-radius: 6px;
  overflow: hidden;
}

table.corp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

table.corp-table th,
table.corp-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--table-rule);
  vertical-align: top;
  font-size: 0.9375rem;
  line-height: 1.75;
}

table.corp-table tr:last-child th,
table.corp-table tr:last-child td {
  border-bottom: none;
}

table.corp-table th {
  width: 28%;
  font-weight: 700;
  color: var(--ink-primary);
  background-color: #fafbfc;
}

table.corp-table td {
  color: var(--ink-secondary);
}

.business-list {
  margin: 0;
  padding-left: 1.25rem;
}

.business-list li {
  margin-bottom: 0.375rem;
}

.business-list li:last-child {
  margin-bottom: 0;
}

.advisor-badge-slot {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  margin-top: 0.5rem;
  padding: 0.625rem 1rem;
  background-color: var(--surface-muted);
  border-radius: 4px;
}

.advisor-badge-slot img {
  height: 2.25rem;
  width: auto;
}

/* Contact Section */
.contact-panel {
  background-color: var(--surface-muted);
  padding: 2.5rem;
  border-radius: 6px;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: center;
}

.contact-panel h3 {
  margin: 0 0 0.625rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.contact-panel p {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  color: var(--ink-secondary);
}

.contact-meta {
  font-size: 0.8125rem;
  color: var(--ink-caption);
  margin: 0;
}

.contact-cta-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

/* Legal Subpages (/privacy, /antisocial-policy, /legal) */
.legal-page-header {
  background-color: var(--surface-muted);
  padding: 3.5rem 0 3rem;
}

.breadcrumb-nav {
  margin-bottom: 1rem;
  font-size: 0.8125rem;
  color: var(--ink-caption);
}

.breadcrumb-nav a {
  color: var(--ink-secondary);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  text-decoration: underline;
}

.legal-body {
  padding: 3.75rem 0 5rem;
}

.legal-article {
  max-width: 52rem;
}

.legal-article h2 {
  margin: 2.5rem 0 0.875rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.legal-article h2:first-child {
  margin-top: 0;
}

.legal-article p,
.legal-article li {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink-secondary);
}

.legal-article ul,
.legal-article ol {
  padding-left: 1.5rem;
  margin: 0.75rem 0 1.25rem;
}

.legal-signature {
  margin-top: 2.75rem;
  padding: 1.5rem 1.75rem;
  background-color: var(--surface-muted);
  border-radius: 6px;
  font-size: 0.9375rem;
  color: var(--ink-primary);
}

/* Footer */
.site-footer[data-ui] {
  background-color: var(--surface-navy);
  color: var(--ink-on-navy);
  padding: 4rem 0 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0 0 0.625rem;
  color: var(--ink-on-navy);
}

.footer-meta {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--ink-on-navy-muted);
}

.footer-col h2 {
  margin: 0 0 0.875rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--ink-on-navy);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--ink-on-navy-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-shield {
  background-color: var(--surface-navy-elevated);
  padding: 1.25rem 1.5rem;
  border-radius: 6px;
  margin-bottom: 2rem;
}

.footer-shield p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--ink-on-navy-muted);
}

.footer-shield p + p {
  margin-top: 0.375rem;
}

.footer-shield a {
  color: #93c5fd;
}

.footer-bottom[data-ui] {
  padding-top: 1.5rem;
  border-top: 1px solid #1e3252;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--ink-on-navy-muted);
}

/* Responsive Breakpoints */
@media (max-width: 920px) {
  .registry-strip,
  .pillar-grid,
  .tech-grid,
  .governance-grid,
  .contact-panel,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.875rem 0;
    gap: 0.75rem;
  }

  .site-nav {
    gap: 1rem;
  }
}

@media (max-width: 640px) {
  .hero-band {
    padding: 3.25rem 0 3rem;
  }

  .section-white,
  .section-muted {
    padding: 3.5rem 0;
  }

  table.corp-table th,
  table.corp-table td {
    display: block;
    width: 100%;
    padding: 0.875rem 1.125rem;
  }

  table.corp-table th {
    padding-bottom: 0.375rem;
    border-bottom: none;
  }
}