:root {
  --navy: #07113d;
  --navy-2: #0d1c59;
  --ink: #121826;
  --muted: #5d6576;
  --line: #dbe3ef;
  --surface: #f7f9fc;
  --white: #ffffff;
  --teal: #2aa6a1;
  --green: #2f7d5b;
  --gold: #e0a638;
  --red: #b95a4a;
  --shadow: 0 18px 45px rgba(7, 17, 61, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 100;
  background: var(--white);
  color: var(--navy);
  padding: 0.7rem 1rem;
  border: 1px solid var(--line);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner,
.section-inner,
.footer-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--navy);
  font-weight: 700;
}

.brand img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.brand span {
  font-size: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--navy);
  font-size: 0.94rem;
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus {
  border-color: var(--teal);
}

.nav-button,
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
}

.nav-button {
  padding: 0.6rem 0.9rem;
  color: var(--white);
  background: var(--navy);
}

.button {
  padding: 0.8rem 1rem;
  border: 1px solid transparent;
}

.button-primary {
  color: var(--navy);
  background: var(--white);
}

.button-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}

.button-dark {
  color: var(--white);
  background: var(--navy);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--navy);
  font-size: 1.4rem;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px 0;
  background: var(--navy);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: min(760px, 86svh);
  color: var(--white);
  background-color: var(--navy);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(7, 17, 61, 0.98) 0%, rgba(7, 17, 61, 0.9) 44%, rgba(7, 17, 61, 0.48) 100%),
    url("koseiteki_wireless_logo.png") right 12% center / min(720px, 58vw) auto no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  z-index: -1;
  height: 160px;
  background:
    linear-gradient(90deg, rgba(42, 166, 161, 0.18), rgba(224, 166, 56, 0.18), rgba(47, 125, 91, 0.18)),
    repeating-linear-gradient(90deg, transparent 0 54px, rgba(255, 255, 255, 0.1) 54px 55px);
}

.hero-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 96px 0 88px;
}

.eyebrow,
.section-label {
  margin: 0 0 0.65rem;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: 64px;
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 660px;
  margin: 1.5rem 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.15rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 1px;
  max-width: 880px;
  margin-top: 3.5rem;
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.proof-item {
  min-height: 116px;
  padding: 1rem;
  background: rgba(7, 17, 61, 0.72);
}

.proof-item strong {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--white);
  font-size: 1.05rem;
}

.proof-item span {
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.9rem;
}

.section {
  padding: 84px 0;
}

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

.section-navy {
  color: var(--white);
  background: var(--navy);
}

.section-navy .section-label,
.section-navy h2,
.section-navy h3 {
  color: var(--white);
}

.section-navy p,
.section-navy li {
  color: rgba(255, 255, 255, 0.78);
}

.section-heading {
  display: grid;
  grid-template-columns: 0.75fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 2.4rem;
}

.section-heading h2,
.narrow h1,
.narrow h2 {
  margin: 0;
  color: var(--navy);
  font-size: 42px;
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p,
.narrow p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: stretch;
}

.statement-panel {
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.statement-panel h3,
.division-card h3,
.service-list h3,
.person-card h3,
.value-item h3 {
  margin: 0 0 0.65rem;
  color: var(--navy);
  font-size: 1.2rem;
  line-height: 1.25;
}

.statement-panel p,
.division-card p,
.service-list p,
.person-card p,
.value-item p {
  margin: 0;
  color: var(--muted);
}

.statement-stack {
  display: grid;
  gap: 1rem;
}

.divisions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.division-card {
  min-height: 100%;
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.division-card img {
  width: 100%;
  height: 110px;
  object-fit: contain;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1rem;
}

.division-card ul,
.service-list ul,
.qualification-list,
.check-list {
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.division-card li,
.service-list li,
.qualification-list li,
.check-list li {
  position: relative;
  padding-left: 1.05rem;
  margin: 0.45rem 0;
  color: var(--muted);
}

.division-card li::before,
.service-list li::before,
.qualification-list li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
}

.service-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 2rem;
  align-items: start;
}

.capability-map {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.map-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  background: var(--white);
}

.map-row strong,
.map-row span {
  padding: 1rem;
}

.map-row strong {
  color: var(--navy);
  background: #eef3fa;
}

.map-row span {
  color: var(--muted);
}

.service-list {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.person-card {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 1rem;
  min-height: 100%;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.photo-placeholder,
.person-photo {
  width: 128px;
  min-height: 168px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  background:
    linear-gradient(135deg, rgba(7, 17, 61, 0.08), rgba(42, 166, 161, 0.12)),
    radial-gradient(circle at 50% 42%, rgba(7, 17, 61, 0.1) 0 28px, transparent 29px);
  font-size: 1.35rem;
  font-weight: 700;
}

.person-photo {
  display: block;
  height: 168px;
  object-fit: cover;
}

.person-role {
  margin-bottom: 0.75rem;
  color: var(--navy);
  font-weight: 700;
}

.person-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.person-links a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--navy);
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.person-links a:hover,
.person-links a:focus {
  border-color: var(--teal);
}

.section-action {
  display: flex;
  justify-content: flex-start;
  margin-top: 1.4rem;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.value-item {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.value-item h3 {
  color: var(--navy);
}

.section-navy .value-item {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.section-navy .value-item h3 {
  color: var(--white);
}

.contact-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.contact-band h2 {
  margin: 0 0 0.6rem;
  color: var(--navy);
  font-size: 2rem;
  line-height: 1.18;
}

.contact-band p {
  margin: 0;
  color: var(--muted);
}

.contact-details {
  display: grid;
  gap: 0.45rem;
  margin-top: 1rem;
}

.contact-details strong {
  display: inline-block;
  min-width: 74px;
  color: var(--navy);
}

.site-footer {
  color: rgba(255, 255, 255, 0.76);
  background: var(--navy);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 2rem 0;
}

.footer-inner a {
  color: var(--white);
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-hero {
  padding: 76px 0 56px;
  color: var(--white);
  background: var(--navy);
}

.page-hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: 52px;
  line-height: 1.08;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 720px;
  margin: 1rem 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.08rem;
}

.narrow {
  max-width: 820px;
}

@media (max-width: 940px) {
  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 74px;
    display: none;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
    gap: 0.55rem;
  }

  .hero h1 {
    font-size: 44px;
  }

  .hero-proof,
  .divisions-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-heading,
  .about-grid,
  .service-layout,
  .contact-band {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 660px) {
  .header-inner,
  .section-inner,
  .footer-inner,
  .hero-inner {
    width: min(100% - 28px, 1120px);
  }

  .brand span {
    font-size: 0.95rem;
  }

  .hero {
    min-height: auto;
  }

  .hero::before {
    background:
      linear-gradient(90deg, rgba(7, 17, 61, 0.96), rgba(7, 17, 61, 0.82)),
      url("koseiteki_wireless_logo.png") right -90px top 46px / 410px auto no-repeat;
  }

  .hero-inner {
    padding: 72px 0 60px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 34px;
  }

  .hero-copy,
  .page-hero p {
    font-size: 1rem;
  }

  .section {
    padding: 58px 0;
  }

  .section-heading h2,
  .narrow h1,
  .narrow h2 {
    font-size: 30px;
  }

  .hero-proof,
  .divisions-grid,
  .people-grid,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .person-card {
    grid-template-columns: 1fr;
  }

  .photo-placeholder,
  .person-photo {
    width: 100%;
    min-height: 220px;
  }

  .map-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}