@import url("https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@600;700&display=swap");

:root {
  --bg: #fbfbfa;
  --ink: #1a1a1a;
  --muted: #8a8a8a;
  --body: #5a5a58;
  --faint: #b0b0ae;
  --line: #e6e6e3;
  --line-strong: #ddddda;
  --panel: #fff;
  --panel-muted: #f5f5f3;
  --accent: #3b6db8;
  --accent-soft: #c5d6ef;
  --accent-text: #2f5fad;
  --mono: ui-monospace, Menlo, Consolas, "SF Mono", "Hiragino Sans", monospace;
  --brand: "Chakra Petch", ui-monospace, Menlo, sans-serif;
  --sans: "Helvetica Neue", Arial, "Hiragino Sans", "Noto Sans JP", sans-serif;
  --content: 700px;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
}

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

a:hover {
  color: color-mix(in oklab, var(--accent) 85%, black);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content);
  margin: 0 auto;
  padding: 12px 24px;
  min-height: 48px;
}

.site-logo {
  font-family: var(--brand);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--ink);
}

.brand-io {
  color: var(--accent);
}

.site-logo:hover .brand-io {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--mono);
  font-size: 12px;
}

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

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

.lang-switch {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 4px 10px;
}

.lang-switch:hover {
  color: var(--ink);
  border-color: var(--muted);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 11px;
  background: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
}

.header-actions {
  display: none;
  align-items: center;
  gap: 2px;
}

.site-main {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 24px 60px;
}

/* Hero */
.hero {
  padding: 48px 0 60px;
  background: radial-gradient(#e4e4e1 1px, transparent 1px) 0 0 / 22px 22px;
}

.hero__prompt {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 12px;
}

.hero__title {
  margin: 0;
  font-family: var(--brand);
  font-size: clamp(48px, 13vw, 88px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.hero__desc {
  margin: 8px 0 0;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 2;
  color: var(--body);
}

/* Sections */
.section {
  padding: 0 0 52px;
  scroll-margin-top: 64px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.section-heading__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.section-heading h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.section-heading__rule {
  flex: 1;
  border-top: 1px solid var(--line);
  transform: translateY(-4px);
}

/* Product card */
.product-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 16px;
  padding: 22px 24px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--panel);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.product-card:hover {
  color: inherit;
  border-color: var(--accent);
  box-shadow: 0 3px 12px color-mix(in oklab, var(--accent) 10%, transparent);
}

.product-card__name {
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-card__name span:first-child {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.badge-live {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent-text);
  border: 1px solid var(--accent-soft);
  border-radius: 3px;
  padding: 2px 7px;
}

.product-card__url {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  align-self: center;
}

.product-card__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--body);
  text-wrap: pretty;
}

/* Company table */
.company-table {
  display: grid;
  grid-template-columns: 140px 1fr;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  overflow: hidden;
}

.company-row {
  display: contents;
}

.company-table dt {
  padding: 12px 18px;
  color: var(--muted);
  background: var(--panel-muted);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
}

.company-table dd {
  margin: 0;
  padding: 10px 16px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.company-row:last-child dt,
.company-row:last-child dd {
  border-bottom: none;
}

.company-table--en {
  grid-template-columns: 150px 1fr;
}

/* Contact */
.contact-note {
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--body);
  text-wrap: pretty;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 12px 28px;
  border-radius: 4px;
  background: var(--panel);
  transition: background 0.15s ease, color 0.15s ease;
}

.contact-button:hover {
  background: var(--ink);
  color: #fff;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  max-width: var(--content);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink);
}

.site-footer__x {
  margin-left: auto;
  color: var(--faint);
}

/* Legal pages */
.legal-main {
  max-width: var(--content);
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.legal-path {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

.legal-main > h1 {
  margin: 0 0 8px;
  font-size: 24px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--ink);
}

.legal-updated {
  margin: 0 0 40px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
}

.legal-sections {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.legal-sections section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.legal-sections h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.legal-sections p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--body);
}

.legal-sections a {
  text-decoration: underline;
}

.back-link {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
}

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

/* Mobile menu */
.mobile-nav {
  display: none;
}

body.nav-open {
  overflow: hidden;
}

body.nav-open .mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 20px 24px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.mobile-nav a {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.mobile-nav a:last-child {
  border-bottom: none;
}

/* Mobile */
@media screen and (max-width: 720px) {
  .site-header__inner {
    padding: 4px 8px 4px 20px;
  }

  .site-nav {
    display: none;
  }

  .header-actions {
    display: flex;
  }

  .header-actions .lang-switch {
    border: none;
    padding: 0 10px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav-toggle {
    display: flex;
  }

  .site-main {
    padding: 0 20px 48px;
  }

  .hero {
    padding: 44px 0 52px;
    background-size: 20px 20px;
  }

  .hero__prompt {
    margin-bottom: 14px;
  }

  .hero__desc {
    font-size: 12px;
  }

  .section {
    padding: 0 0 44px;
  }

  .section-heading {
    gap: 10px;
    margin-bottom: 14px;
  }

  .product-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 18px 20px;
  }

  .product-card__url {
    align-self: flex-start;
  }

  .company-table {
    display: block;
  }

  .company-row {
    display: block;
    padding: 12px 16px;
    border-bottom: 1px solid #eeeeec;
  }

  .company-row:last-child {
    border-bottom: none;
  }

  .company-table dt,
  .company-table dd {
    display: block;
    border-bottom: none;
    padding: 0;
  }

  .company-table dt {
    background: none;
    font-size: 11px;
    margin-bottom: 2px;
  }

  .company-table dd {
    color: var(--ink);
  }

  .contact-note {
    margin-bottom: 16px;
    font-size: 13px;
  }

  .contact-button {
    display: flex;
    justify-content: center;
    padding: 15px 28px;
  }

  .site-footer__inner {
    flex-wrap: wrap;
    row-gap: 10px;
    column-gap: 16px;
    padding: 18px 20px;
  }

  .site-footer__copy {
    order: 2;
    flex: 1 1 auto;
  }

  .site-footer__inner > a {
    order: 1;
  }

  .site-footer__x {
    order: 3;
    margin-left: 0;
  }

  .legal-main {
    padding: 32px 20px 56px;
  }

  .legal-main > h1 {
    font-size: 20px;
  }
}