:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #1e40af;
  --accent-hover: #1d4ed8;
  --alt: #f1f5f9;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.container {
  width: min(1080px, 92vw);
  margin-inline: auto;
}

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

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

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  color: var(--text);
}

.site-header nav {
  display: flex;
  gap: 1.25rem;
}

.site-header nav a {
  text-decoration: none;
  font-size: 0.9375rem;
  color: var(--muted);
}

.site-header nav a:hover {
  color: var(--accent);
}

.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.hero h1 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  max-width: 18ch;
}

.lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 52ch;
  margin: 0 0 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
}

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

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.hero-stat {
  font-size: 0.9375rem;
  margin: 0 0 1.25rem;
  max-width: 52ch;
}

.section-sales {
  background: var(--surface);
  border-block: 1px solid var(--border);
}

.sales-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  max-width: 62ch;
}

.sales-points li {
  padding-left: 1.25rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.sales-points strong {
  color: var(--text);
}

.legal-notice-box {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
}

.legal-notice-box h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.legal-notice-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  max-width: 65ch;
}

.legal-notice-list li {
  margin-bottom: 0.65rem;
}

.disclaimer-inline {
  font-size: 0.8125rem;
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 0.75rem;
  margin: 0;
  max-width: 60ch;
}

.changelog-subscribe-cta {
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--surface-alt, #f8fafc);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: var(--radius);
}

.changelog-subscribe-cta h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.changelog-subscribe-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.changelog-subscribe-cta .muted.small,
.changelog-subscribe-cta p.muted.small {
  margin-top: 1rem;
  margin-bottom: 0;
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--alt);
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
}

.section-intro {
  margin: 0 0 1.5rem;
  max-width: 60ch;
}

.feature-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature-grid h3 {
  margin: 0 0 0.35rem;
  font-size: 1.0625rem;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.8125rem;
}

.note {
  margin-top: 1.5rem;
  font-size: 0.875rem;
}

.list-roadmap {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: #dbeafe;
  color: var(--accent);
  margin-right: 0.5rem;
}

.badge-soon {
  background: #e2e8f0;
  color: var(--muted);
}

.signup-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.875rem;
}

.signup-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.signup-row input {
  flex: 1 1 220px;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
}

.pricing-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.price-card-muted {
  opacity: 0.92;
}

.price-card h3 {
  margin: 0 0 0.5rem;
}

.price {
  margin: 0 0 1rem;
}

.price .amount {
  font-size: 2rem;
  font-weight: 700;
}

.price .period {
  color: var(--muted);
  font-size: 0.9375rem;
}

.price-card ul {
  margin: 0 0 1.25rem;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

.price-card li + li {
  margin-top: 0.35rem;
}

.faq-list {
  margin: 0;
}

.faq-list > div {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}

.faq-list > div:first-child {
  padding-top: 0;
}

.faq-list dt {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.faq-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer {
  background: var(--text);
  color: #cbd5e1;
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-disclaimer {
  font-size: 0.8125rem;
  margin: 0;
  max-width: 65ch;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer nav a {
  color: #e2e8f0;
  text-decoration: none;
  font-size: 0.875rem;
}

.site-footer nav a:hover {
  color: #fff;
}

.site-footer .muted {
  color: #94a3b8;
}

.legal-doc h1 {
  margin-top: 0;
}

.legal-doc h2 {
  font-size: 1.125rem;
  margin-top: 1.5rem;
}

.tokushoho-list {
  margin: 0 0 1rem;
}

.tokushoho-list dt {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: 0.75rem;
}

.tokushoho-list dd {
  margin: 0.25rem 0 0;
}

.legal-notice {
  background: var(--alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}

.legal-notice ol {
  margin: 0;
  padding-left: 1.25rem;
}

.legal-notice li + li {
  margin-top: 0.75rem;
}

.legal-list {
  padding-left: 1.25rem;
}

.legal-list li + li {
  margin-top: 0.5rem;
}

.changelog-detail-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.changelog-detail-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.changelog-table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.changelog-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.changelog-table th,
.changelog-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.changelog-table th {
  background: var(--alt);
  font-weight: 600;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.changelog-table tbody tr:last-child td {
  border-bottom: none;
}

.changelog-field-changes {
  margin: 0;
  padding-left: 1.1rem;
  list-style: disc;
}

.changelog-field-changes li + li {
  margin-top: 0.25rem;
}

.changelog-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0.75rem 0;
}

.changelog-pager-summary {
  margin: 0;
}

.changelog-pager-links {
  display: flex;
  gap: 0.5rem;
}

.changelog-pager-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

.changelog-pager-btn[aria-disabled] {
  opacity: 0.45;
  pointer-events: none;
}

@media (max-width: 640px) {
  .site-header nav {
    display: none;
  }
}