:root {
  --bg: #f2f5f8;
  --ink: #0f1e2d;
  --muted: #5f6f80;
  --brand: #0a8fdc;
  --brand-dark: #0a3a69;
  --white: #ffffff;
  --line: #d9e2ea;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}

.brand img {
  height: 44px;
  width: auto;
}

.main-nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-weight: 600;
  font-size: 0.95rem;
}

.hero {
  min-height: 70vh;
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-carousel .hero-media-layer,
.hero-carousel .hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-carousel .hero-media-layer {
  z-index: 0;
  transform: translate3d(0, var(--hero-parallax, 0px), 0);
  will-change: transform;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 900ms ease;
  animation: heroCycle 39s infinite;
  animation-delay: calc(var(--slide-index, 0) * 6.5s);
}

.hero-slide.is-active {
  opacity: 1;
}

@keyframes heroCycle {
  0% { opacity: 0; }
  4% { opacity: 1; }
  16% { opacity: 1; }
  20% { opacity: 0; }
  100% { opacity: 0; }
}

.hero-bg-image,
.hero-bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.08);
}

.hero-overlay {
  background: linear-gradient(rgba(7, 23, 38, 0.56), rgba(7, 23, 38, 0.78));
  z-index: 1;
}

.hero-content {
  color: var(--white);
  padding: 5rem 0;
  max-width: 760px;
  position: relative;
  z-index: 2;
}

.hero-icon {
  width: clamp(150px, 17vw, 240px);
  height: auto;
  object-fit: contain;
  margin-bottom: 1rem;
}

.eyebrow {
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  opacity: 0.92;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  line-height: 1.1;
}

h2 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
}

h3 {
  margin: 0 0 0.6rem;
}

p,
li {
  line-height: 1.7;
}

.section-lead {
  max-width: 780px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.92rem;
}

.btn-primary {
  background: var(--brand);
  color: var(--white);
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.65);
  color: var(--white);
}

.section {
  padding: 4rem 0;
}

.alt {
  background: #e9eef4;
}

.cards {
  margin-top: 1.2rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.2rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 1.4rem;
  align-items: center;
}

.panel {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.panel img {
  width: 100%;
  display: block;
  height: 100%;
  object-fit: cover;
}

.feature-list,
.tech-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.feature-list li,
.tech-list li {
  margin-bottom: 0.45rem;
}

.company-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
  align-items: start;
}

.prose-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 1.4rem;
  align-items: start;
}

.stack-panels {
  display: grid;
  gap: 1.4rem;
}

.prose-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem;
}

.signature {
  margin-top: 1.2rem;
  font-weight: 700;
}

.gallery-grid {
  margin-top: 1.4rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gallery-item {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.simple-content {
  padding: 3rem 0;
}

.site-footer {
  background: var(--brand-dark);
  color: #d9e7f2;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
  padding: 2rem 0 1.5rem;
}

.copyright {
  text-align: center;
  font-size: 0.82rem;
  padding: 0.8rem 1rem 1rem;
  border-top: 1px solid rgba(217, 231, 242, 0.2);
}

@media (max-width: 900px) {
  .cards,
  .two-col,
  .company-grid,
  .prose-grid,
  .footer-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .main-nav {
    font-size: 0.9rem;
    gap: 0.7rem;
  }

  .hero {
    min-height: 60vh;
  }

  .hero-icon {
    width: clamp(110px, 29vw, 180px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide {
    animation: none;
  }
}


.gallery-subtitle {
  margin-top: 2.2rem;
}