:root {
  --ink: #1d241f;
  --deep: #20382c;
  --green: #51765f;
  --sage: #dfe9df;
  --mist: #f4f6f1;
  --paper: #fffaf0;
  --wood: #a7693d;
  --clay: #d98c52;
  --line: rgba(29, 36, 31, 0.14);
  --white: #ffffff;
  --muted: #68736a;
  --font-jp: 'Noto Sans JP', sans-serif;
  --font-en: 'Montserrat', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--mist);
  line-height: 1.8;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: 76px;
  padding: 0 clamp(18px, 4vw, 54px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 250, 240, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-symbol {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--deep);
  color: var(--paper);
  font-family: var(--font-en);
  font-weight: 700;
}
.brand strong {
  display: block;
  font-size: 1rem;
}
.brand small {
  display: block;
  font-family: var(--font-en);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}
.global-nav {
  display: flex;
  gap: 28px;
}
.global-nav a {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}
.header-cta {
  padding: 10px 18px;
  background: var(--deep);
  color: var(--white);
  font-weight: 700;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("assets/hero-renovation.png");
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(244,246,241,0.98) 0%, rgba(244,246,241,0.88) 43%, rgba(244,246,241,0.1) 100%),
    linear-gradient(0deg, rgba(32,56,44,0.18), rgba(32,56,44,0.08));
}
.hero-inner {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  align-items: end;
  gap: clamp(28px, 6vw, 80px);
  padding: 140px clamp(22px, 6vw, 76px) 76px;
}
.label {
  margin: 0 0 14px;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--wood);
}
.hero h1 {
  margin: 0 0 22px;
  max-width: 720px;
  font-size: clamp(3rem, 8vw, 7.3rem);
  line-height: 0.98;
  letter-spacing: 0;
}
.lead {
  max-width: 600px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.16rem);
}
.hero-actions, .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 13px 26px;
  font-weight: 700;
  border: 1px solid transparent;
}
.btn.primary {
  background: var(--deep);
  color: var(--white);
}
.btn.secondary {
  background: rgba(255,255,255,0.74);
  border-color: var(--line);
  color: var(--deep);
}
.btn.secondary.light {
  color: var(--white);
  border-color: rgba(255,255,255,0.36);
  background: transparent;
}
.hero-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.hero-panel {
  background: rgba(255, 250, 240, 0.92);
  border: 1px solid rgba(255,255,255,0.72);
  padding: 28px;
  box-shadow: 0 30px 80px rgba(32,56,44,0.18);
}
.hero-panel span {
  font-family: var(--font-en);
  color: var(--wood);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.7rem;
  font-weight: 700;
}
.hero-panel strong {
  display: block;
  font-family: var(--font-en);
  font-size: 4.4rem;
  line-height: 1;
  color: var(--deep);
}
.hero-panel p { color: var(--muted); margin: 8px 0 20px; }
.hero-panel dl { margin: 0; }
.hero-panel div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}
.hero-panel dt { color: var(--muted); }
.hero-panel dd { margin: 0; font-weight: 700; }

.intro {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.intro-item {
  padding: clamp(32px, 5vw, 58px);
  background: var(--paper);
  border-right: 1px solid var(--line);
}
.intro-item.dark {
  background: var(--deep);
  color: var(--white);
}
.intro-item span {
  font-family: var(--font-en);
  color: var(--clay);
  font-weight: 700;
}
.intro-item h2 {
  margin: 8px 0 10px;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
}
.intro-item p {
  margin: 0;
  color: var(--muted);
}
.intro-item.dark p { color: rgba(255,255,255,0.72); }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(22px, 5vw, 54px);
}
.section { padding: clamp(78px, 11vw, 138px) 0; }
.split {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(34px, 7vw, 86px);
}
.section-side h2, .section-head h2, .showcase-copy h2, .company-card h2, .contact h2 {
  margin: 0;
  font-size: clamp(2.2rem, 4.7vw, 4.4rem);
  line-height: 1.12;
}
.section-head {
  max-width: 720px;
  margin-bottom: 42px;
}
.section-head p, .showcase-copy p, .company-card p, .contact p {
  color: var(--muted);
}

.promise { background: var(--mist); }
.promise-list {
  display: grid;
  gap: 14px;
}
.promise-list article, .service-grid article, .work-grid article {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px;
}
.promise-list span, .service-grid span, .work-grid span {
  font-family: var(--font-en);
  color: var(--wood);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 700;
}
.promise-list h3, .service-grid h3, .work-grid h3 {
  margin: 8px 0;
  font-size: 1.18rem;
}
.promise-list p, .service-grid p, .work-grid p {
  margin: 0;
  color: var(--muted);
}

.services { background: var(--paper); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.service-grid article {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  background: var(--deep);
  color: var(--white);
}
.showcase-image img {
  height: 100%;
  min-height: 560px;
  object-fit: cover;
}
.showcase-copy {
  align-self: center;
  padding: clamp(42px, 7vw, 88px);
}
.showcase-copy p { color: rgba(255,255,255,0.72); }
.case-row {
  display: grid;
  gap: 10px;
  margin-top: 30px;
}
.case-row div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid rgba(255,255,255,0.16);
}
.case-row span { color: rgba(255,255,255,0.58); }

.works { background: var(--mist); }
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.work-grid article {
  min-height: 230px;
}

.flow { background: var(--paper); }
.flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.flow-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.flow-list span {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  background: var(--sage);
  color: var(--deep);
  font-family: var(--font-en);
  font-weight: 700;
}
.flow-list h3 { margin: 0 0 4px; }
.flow-list p { margin: 0; color: var(--muted); }

.company { background: var(--mist); }
.company-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--line);
  padding: clamp(32px, 5vw, 58px);
}
.company-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.company-stats div {
  background: var(--mist);
  padding: 20px;
}
.company-stats strong {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--deep);
  line-height: 1;
}
.company-stats span { color: var(--muted); font-size: 0.88rem; }

.contact {
  padding: clamp(78px, 11vw, 140px) 0;
  background:
    linear-gradient(135deg, rgba(32,56,44,0.95), rgba(29,36,31,0.96)),
    var(--deep);
  color: var(--white);
}
.contact-inner {
  text-align: center;
  max-width: 850px;
}
.contact p { margin-left: auto; margin-right: auto; color: rgba(255,255,255,0.72); }
.contact-actions { justify-content: center; }
.site-footer {
  padding: 24px;
  text-align: center;
  background: #141a16;
  color: rgba(255,255,255,0.48);
  font-family: var(--font-en);
  letter-spacing: 0.16em;
  font-size: 0.72rem;
}

@media (max-width: 980px) {
  .global-nav { display: none; }
  .hero-inner, .split, .showcase, .company-card {
    grid-template-columns: 1fr;
  }
  .hero-panel { max-width: 420px; }
  .intro, .service-grid, .work-grid {
    grid-template-columns: 1fr;
  }
  .showcase-image img { min-height: 360px; }
  .company-stats { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header {
    height: 68px;
    padding: 0 16px;
  }
  .brand small { display: none; }
  .brand-symbol { width: 38px; height: 38px; }
  .header-cta { padding: 8px 12px; font-size: 0.86rem; }
  .hero-inner { padding: 118px 18px 48px; }
  .hero h1 { font-size: clamp(2.7rem, 15vw, 4.8rem); }
  .hero-overlay {
    background: linear-gradient(90deg, rgba(244,246,241,0.98), rgba(244,246,241,0.82));
  }
  .btn { width: 100%; }
  .hero-panel { padding: 22px; }
  .intro-item { padding: 28px 22px; }
  .promise-list article, .service-grid article, .work-grid article { padding: 22px; }
  .case-row div { display: block; }
}