:root {
  --kdi-ink: #102a43;
  --kdi-ink-soft: #243b53;
  --kdi-teal: #0f7c7c;
  --kdi-teal-deep: #0a5c5c;
  --kdi-mist: #f4f7f8;
  --kdi-paper: #ffffff;
  --kdi-line: #d9e2ec;
  --kdi-muted: #627d98;
  --kdi-accent: #c6a75e;
  --kdi-shadow: 0 18px 40px rgba(16, 42, 67, 0.12);
  --kdi-radius: 18px;
  --kdi-container: 1120px;
  --kdi-font-sans: "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --kdi-font-serif: "Shippori Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--kdi-ink);
  background:
    radial-gradient(circle at top right, rgba(15, 124, 124, 0.08), transparent 28%),
    linear-gradient(180deg, #eef3f6 0%, var(--kdi-mist) 42%, #e8eef2 100%);
  font-family: var(--kdi-font-sans);
  font-size: 16px;
  line-height: 1.8;
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--kdi-teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--kdi-teal);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--kdi-ink);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 1000;
}

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

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(217, 226, 236, 0.9);
  transition: box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(16, 42, 67, 0.08);
}

.site-header__inner,
.site-nav,
.layout-with-sidebar,
.layout-narrow,
.page-hero__inner,
.site-footer__inner,
.hero__content {
  width: min(100% - 2rem, var(--kdi-container));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0 0.75rem;
}

.site-header__catch {
  margin: 0 0 0.35rem;
  color: var(--kdi-muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.site-header__logo {
  margin: 0;
  font-family: var(--kdi-font-serif);
  font-size: 1.45rem;
  font-weight: 700;
}

.site-header__logo a {
  color: inherit;
  text-decoration: none;
}

.site-logo {
  width: min(240px, 55vw);
  height: auto;
}

.site-header__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.55rem;
}

.site-header__utility {
  display: flex;
  gap: 0.85rem;
  font-size: 0.82rem;
}

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

.site-header__tel {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: var(--kdi-ink);
  color: #fff;
  text-decoration: none;
  box-shadow: var(--kdi-shadow);
}

.site-header__tel:hover {
  color: #fff;
  background: var(--kdi-teal-deep);
}

.site-header__tel-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.site-header__tel-number {
  font-family: var(--kdi-font-serif);
  font-size: 1.05rem;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--kdi-line);
  background: var(--kdi-paper);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}

.nav-toggle__bar {
  width: 18px;
  height: 2px;
  background: var(--kdi-ink);
  box-shadow: 0 5px 0 var(--kdi-ink), 0 -5px 0 var(--kdi-ink);
}

.site-nav {
  padding: 0.35rem 0 0.85rem;
}

.nav-list,
.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.nav-list a,
.footer-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.35rem 0.95rem;
  border-radius: 999px;
  color: var(--kdi-ink);
  text-decoration: none;
  background: transparent;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-list a:hover,
.nav-list .current-menu-item > a,
.footer-nav-list a:hover {
  background: rgba(15, 124, 124, 0.1);
  color: var(--kdi-teal-deep);
}

.hero {
  position: relative;
  min-height: min(78vh, 720px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
}

.hero__media,
.hero__slide,
.hero__fallback,
.hero__veil {
  position: absolute;
  inset: 0;
}

.hero__slide {
  opacity: 0;
  transition: opacity 1.4s ease;
}

.hero__slide.is-active {
  opacity: 1;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__fallback {
  background:
    linear-gradient(135deg, #0f3d4c, #184e77 48%, #0f7c7c);
}

.hero__veil {
  background:
    linear-gradient(180deg, rgba(16, 42, 67, 0.18), rgba(16, 42, 67, 0.72) 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 4.5rem 0 3.5rem;
  animation: kdi-rise 0.9s ease both;
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
  opacity: 0.85;
}

.hero__title,
.page-hero__title,
.entry-title,
.section-title {
  font-family: var(--kdi-font-serif);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.35;
}

.hero__title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  max-width: 12em;
}

.hero__lead {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  font-size: 1.05rem;
  opacity: 0.92;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  border: 0;
  text-decoration: none;
  font-weight: 700;
}

.button--primary {
  background: var(--kdi-accent);
  color: var(--kdi-ink);
  box-shadow: var(--kdi-shadow);
}

.button--primary:hover {
  filter: brightness(1.05);
  color: var(--kdi-ink);
}

.page-hero {
  padding: 3.2rem 0 1.6rem;
}

.page-hero__eyebrow {
  margin: 0 0 0.5rem;
  color: var(--kdi-teal);
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.page-hero__title {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.page-hero__lead,
.section-lead {
  margin: 0.85rem 0 0;
  color: var(--kdi-muted);
  max-width: 40rem;
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 2rem;
  padding: 1rem 0 4rem;
}

.layout-narrow {
  width: min(100% - 2rem, 760px);
  margin-inline: auto;
  padding-bottom: 4rem;
}

.section {
  margin-bottom: 2.5rem;
  padding: 1.6rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(217, 226, 236, 0.9);
  border-radius: var(--kdi-radius);
  box-shadow: 0 10px 30px rgba(16, 42, 67, 0.04);
}

.section-title {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  color: var(--kdi-ink);
  padding-left: 0.85rem;
  border-left: 4px solid var(--kdi-teal);
}

.section-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-heading-row .section-title {
  margin-bottom: 0;
}

.text-link {
  font-weight: 700;
  text-decoration: none;
}

.text-link::after {
  content: " →";
}

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

.feature-card {
  padding: 1rem;
  border-radius: 14px;
  background: var(--kdi-paper);
  border: 1px solid var(--kdi-line);
}

.feature-card__media {
  overflow: hidden;
  border-radius: 12px;
  margin-bottom: 0.9rem;
}

.feature-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.feature-card:hover .feature-card__image {
  transform: scale(1.04);
}

.feature-card__title {
  margin: 0 0 0.5rem;
  font-family: var(--kdi-font-serif);
  font-size: 1.1rem;
}

.feature-card__text {
  margin: 0 0 0.8rem;
  color: var(--kdi-muted);
  font-size: 0.95rem;
}

.post-card-list {
  display: grid;
  gap: 1rem;
}

.post-card-list--blog {
  grid-template-columns: 1fr;
}

.post-card {
  overflow: hidden;
  border-radius: 14px;
  background: var(--kdi-paper);
  border: 1px solid var(--kdi-line);
}

.post-card__link {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  text-decoration: none;
  color: inherit;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  min-height: 120px;
  object-fit: cover;
}

.post-card__body {
  padding: 1rem 1.1rem;
}

.post-card__body time {
  color: var(--kdi-muted);
  font-size: 0.82rem;
}

.post-card__body h2,
.post-card__body h3 {
  margin: 0.25rem 0 0.4rem;
  font-family: var(--kdi-font-serif);
  font-size: 1.1rem;
}

.post-card__body p {
  margin: 0;
  color: var(--kdi-muted);
  font-size: 0.92rem;
}

.side-banners__list {
  display: grid;
  gap: 0.75rem;
}

.side-banners__image {
  width: 100%;
  border-radius: 12px;
  box-shadow: var(--kdi-shadow);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--kdi-paper);
}

.data-table th,
.data-table td {
  border: 1px solid var(--kdi-line);
  padding: 0.85rem 1rem;
  vertical-align: top;
  text-align: left;
}

.data-table th {
  width: 28%;
  background: #edf4f4;
  color: var(--kdi-ink-soft);
  font-weight: 700;
}

.about-overview__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
  align-items: start;
}

.about-building,
.philosophy-image,
.info-hero-image img,
.seminar-card__image img,
.product-block__media img {
  width: 100%;
  border-radius: 14px;
}

.map-embed {
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--kdi-line);
}

.map-embed iframe {
  width: 100%;
  min-height: 350px;
  border: 0;
}

.product-block__inner {
  display: grid;
  gap: 1rem;
  align-items: start;
}

.product-block--right .product-block__inner,
.product-block--left .product-block__inner {
  grid-template-columns: 1.1fr 0.9fr;
}

.product-block--left .product-block__media {
  order: -1;
}

.product-block__media--full {
  margin-top: 1rem;
}

.link-columns {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
  align-items: start;
}

.link-list {
  display: grid;
  gap: 0.55rem;
}

.link-list a,
.link-list span {
  display: block;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  background: var(--kdi-paper);
  border: 1px solid var(--kdi-line);
  text-decoration: none;
  color: var(--kdi-ink);
}

.link-list a:hover {
  border-color: var(--kdi-teal);
  background: rgba(15, 124, 124, 0.06);
}

.recruit-video {
  margin-top: 1.5rem;
  overflow: hidden;
  border-radius: 14px;
  background: #000;
}

.recruit-video video {
  width: 100%;
}

.seminar-card__date {
  margin: -0.4rem 0 1rem;
  color: var(--kdi-muted);
}

.richtext > *:first-child {
  margin-top: 0;
}

.richtext > *:last-child {
  margin-bottom: 0;
}

.richtext ul,
.richtext ol {
  padding-left: 1.3rem;
  list-style: disc;
}

.richtext ol {
  list-style: decimal;
}

.entry-header {
  padding-top: 2.5rem;
  padding-bottom: 1rem;
}

.entry-meta {
  margin: 0 0 0.6rem;
  color: var(--kdi-muted);
  font-size: 0.9rem;
}

.entry-title {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.entry-hero-image {
  margin: 0 auto 1.5rem;
}

.entry-hero-image img {
  width: 100%;
  border-radius: var(--kdi-radius);
}

.entry-content {
  font-size: 1.02rem;
}

.entry-footer {
  margin-top: 2rem;
}

.post-navigation .nav-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-navigation a {
  display: block;
  padding: 1rem;
  border-radius: 12px;
  background: var(--kdi-paper);
  border: 1px solid var(--kdi-line);
  text-decoration: none;
  color: inherit;
}

.post-navigation .nav-label {
  display: block;
  color: var(--kdi-muted);
  font-size: 0.8rem;
  margin-bottom: 0.3rem;
}

.blog-widgets .widget {
  margin-bottom: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--kdi-line);
  border-radius: 14px;
}

.widget-title {
  margin: 0 0 0.75rem;
  font-family: var(--kdi-font-serif);
  font-size: 1.05rem;
}

.site-footer {
  margin-top: 2rem;
  padding: 2.5rem 0 1.5rem;
  background: var(--kdi-ink);
  color: rgba(255, 255, 255, 0.88);
}

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

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  align-items: flex-start;
}

.site-footer__logo {
  width: min(280px, 70vw);
  margin-bottom: 1rem;
  filter: brightness(0) invert(1);
}

.site-footer__name {
  margin: 0 0 0.75rem;
  font-family: var(--kdi-font-serif);
  font-size: 1.4rem;
}

.site-footer__address,
.site-footer__contact,
.site-footer__sns {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
}

.site-footer__copy {
  width: min(100% - 2rem, var(--kdi-container));
  margin: 1.5rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.78rem;
  opacity: 0.75;
  text-align: center;
}

.footer-nav-list a {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.footer-nav-list a:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.navigation.pagination {
  margin-top: 1.5rem;
}

.navigation.pagination .nav-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.navigation.pagination a,
.navigation.pagination span {
  display: inline-flex;
  min-width: 2.4rem;
  min-height: 2.4rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--kdi-line);
  background: var(--kdi-paper);
  text-decoration: none;
  color: var(--kdi-ink);
}

.navigation.pagination .current {
  background: var(--kdi-ink);
  color: #fff;
  border-color: var(--kdi-ink);
}

@keyframes kdi-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .layout-with-sidebar,
  .about-overview__grid,
  .link-columns,
  .feature-grid,
  .product-block--right .product-block__inner,
  .product-block--left .product-block__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    flex-direction: column;
  }
}

@media (max-width: 800px) {
  .site-header__meta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    padding-bottom: 1rem;
  }

  .site-nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
  }

  .nav-list a {
    width: 100%;
    border-radius: 12px;
    background: rgba(15, 124, 124, 0.06);
  }

  .post-card__link {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 70vh;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}