:root {
  color-scheme: light;
  font-family: "Meiryo UI", "Meiryo", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  font-synthesis: none;
  --ink: #17233c;
  --muted: #5e6a7e;
  --line: #dfe5ef;
  --brand: #1559a6;
  --brand-dark: #0c3f7b;
  --surface: #ffffff;
  --background: #f4f7fb;
}

[hidden] {
  display: none !important;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #edf5ff 0, var(--background) 24rem);
  line-height: 1.75;
}

a {
  color: var(--brand);
  text-underline-offset: 0.2em;
}

a:hover,
a:focus-visible {
  color: var(--brand-dark);
}

.site-header,
.site-footer {
  background: rgba(255, 255, 255, 0.94);
  border-color: var(--line);
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-inner,
.footer-inner,
.page-shell {
  width: min(100% - 2rem, 960px);
  margin-inline: auto;
}

.header-inner {
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.language-switcher {
  display: flex;
  gap: 0.65rem;
  font-size: 0.9rem;
}

.language-switcher [aria-current="true"] {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.page-shell {
  margin-block: 2rem 4rem;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: 0 1rem 3rem rgba(30, 58, 95, 0.08);
}

.hero {
  padding-block: clamp(2rem, 7vw, 5rem);
}

.landing-shell {
  width: min(100% - 2rem, 1120px);
  padding: 0;
  overflow: hidden;
}

.marketing-hero,
.marketing-section,
.marketing-cta,
.legal-links {
  padding: clamp(2rem, 5vw, 4rem);
}

.marketing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(25rem, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 4vw, 3rem);
}

.marketing-hero h1 {
  max-width: none;
  font-size: clamp(2.2rem, 4.2vw, 3.1rem);
}

.landing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  border: 1px solid var(--brand);
  border-radius: 0.45rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary,
.button-primary:hover,
.button-primary:focus-visible {
  color: #fff;
  background: var(--brand);
}

.button-secondary {
  color: var(--brand-dark);
  background: #fff;
}

.product-preview {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: #fff;
  box-shadow: 0 1rem 2.5rem rgba(30, 58, 95, 0.12);
  font-size: 0.82rem;
}

.product-toolbar,
.product-summary,
.product-row {
  display: grid;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
}

.product-toolbar {
  grid-template-columns: auto 1fr auto;
  border-bottom: 1px solid var(--line);
}

.product-toolbar strong {
  color: var(--brand);
}

.preview-status,
.product-summary span,
.preview-badge {
  padding: 0.2rem 0.45rem;
  border-radius: 0.35rem;
  background: #f0f3f7;
}

.product-summary {
  grid-template-columns: repeat(3, max-content);
  background: #fafbfd;
}

.product-row {
  grid-template-columns: 1fr 1.2fr 1fr 0.8fr;
  border-top: 1px solid #edf0f5;
}

.product-row-header {
  color: var(--muted);
  font-weight: 700;
}

.preview-badge {
  width: max-content;
}

.preview-badge-success {
  color: #216e39;
  background: #eaf7ee;
}

.preview-badge-warning {
  color: #8a5b00;
  background: #fff3d6;
}

.marketing-section {
  border-top: 1px solid var(--line);
}

.marketing-section-muted {
  background: #f7f9fc;
}

.landing-page h2 {
  margin: 0 0 0.7rem;
  padding: 0;
  border: 0;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  letter-spacing: -0.025em;
}

.landing-page h3 {
  margin: 0 0 0.4rem;
}

.section-lead {
  max-width: 48rem;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.75rem;
}

.feature-grid article {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: #fff;
}

.feature-grid p,
.workflow-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.workflow-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.workflow-list li {
  display: flex;
  gap: 0.9rem;
}

.workflow-list li > span {
  display: grid;
  width: 2rem;
  height: 2rem;
  flex: 0 0 2rem;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  font-weight: 700;
}

.marketing-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
}

.security-list {
  min-width: 18rem;
  margin: 0;
}

.security-list li + li {
  margin-top: 0.55rem;
}

.marketing-cta {
  border-top: 1px solid var(--line);
  text-align: center;
}

.marketing-cta .button {
  margin-top: 0.65rem;
}

.landing-page + .legal-links,
.landing-page .legal-links {
  border-top: 1px solid var(--line);
  background: #fff;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.35;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 6vw, 3.75rem);
  letter-spacing: -0.04em;
}

.legal-page h1 {
  font-size: clamp(1.8rem, 5vw, 2.75rem);
}

h2 {
  margin: 2.3rem 0 0.7rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.25rem;
}

p,
li,
dd {
  overflow-wrap: anywhere;
}

.lead {
  max-width: 45rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.legal-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.legal-card {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.legal-card:hover,
.legal-card:focus-visible {
  border-color: var(--brand);
  background: #f6faff;
}

.updated {
  margin: -0.65rem 0 1.5rem;
  color: #616161;
  font-size: 0.8125rem;
  line-height: 1.5;
}

ul {
  padding-left: 1.4rem;
}

dt {
  font-weight: 700;
}

dd {
  margin: 0;
  white-space: pre-line;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.5rem;
}

@media (max-width: 640px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

  .footer-inner {
    display: flex;
  }

  .marketing-hero,
  .feature-grid,
  .workflow-list,
  .marketing-split {
    grid-template-columns: 1fr;
  }

  .marketing-hero,
  .marketing-section,
  .marketing-cta,
  .legal-links {
    padding: 1.5rem;
  }

  .product-preview {
    overflow-x: auto;
  }

  .product-toolbar,
  .product-summary,
  .product-row {
    min-width: 36rem;
  }

  .security-list {
    min-width: 0;
    padding-left: 1.2rem;
  }
}