:root {
  color-scheme: light;
  --ink: #1f2524;
  --sub: #5b6763;
  --paper: #f7f4ed;
  --soft: #ece7dc;
  --line: #d8d1c4;
  --accent: #a6422f;
  --accent-dark: #6f2c22;
  --green: #315f53;
  --white: #fffdf8;
  --shadow: 0 20px 60px rgba(31, 37, 36, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP",
    "Segoe UI", sans-serif;
  line-height: 1.75;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 16px clamp(20px, 4vw, 56px);
  background: rgba(247, 244, 237, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 22px;
  color: var(--sub);
  font-size: 0.9rem;
  font-weight: 700;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 440px);
  align-items: center;
  gap: clamp(32px, 6vw, 80px);
  min-height: calc(100vh - 68px);
  padding: clamp(48px, 8vw, 96px) clamp(20px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 740px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(3.8rem, 13vw, 9.5rem);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 5vw, 4.8rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.6rem, 3vw, 2.7rem);
  line-height: 1.18;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin-bottom: 28px;
  color: var(--sub);
  font-size: clamp(1.02rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font-weight: 800;
  box-shadow: 0 8px 22px rgba(31, 37, 36, 0.08);
}

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

.hero-visual {
  margin: 0;
  padding: clamp(12px, 2.2vw, 22px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 6px;
}

.band {
  padding: clamp(56px, 9vw, 116px) clamp(20px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

.band.muted {
  background: var(--soft);
}

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

.section-heading {
  margin-bottom: 32px;
}

.project-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.project-label {
  margin-bottom: 8px;
  color: var(--green);
  font-weight: 800;
}

.project-feature p,
.text-block p,
.contact-inner p {
  color: var(--sub);
  font-size: 1.04rem;
}

.project-specs {
  display: grid;
  gap: 12px;
  margin: 0;
}

.project-specs div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.project-specs dt {
  color: var(--accent-dark);
  font-weight: 800;
}

.project-specs dd {
  margin: 0;
  color: var(--ink);
}

.service-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-list li {
  min-height: 180px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.service-list span {
  display: block;
  margin-bottom: 12px;
  font-size: 1.08rem;
  font-weight: 900;
}

.service-list p {
  margin-bottom: 0;
  color: var(--sub);
}

.two-column,
.contact-inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(28px, 6vw, 72px);
}

.text-block {
  max-width: 680px;
}

.contact-band {
  background: var(--green);
  color: var(--white);
}

.contact-band .eyebrow,
.contact-band p {
  color: rgba(255, 253, 248, 0.82);
}

.site-footer {
  padding: 28px clamp(20px, 6vw, 88px);
  color: var(--sub);
}

@media (max-width: 900px) {
  .hero,
  .project-feature,
  .two-column,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    max-width: 520px;
  }

  .service-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .service-list {
    grid-template-columns: 1fr;
  }
}