:root {
  --ink: #1c1b1f;
  --bg: #f7f5f1;
  --accent: #a8823f;
  --line: #e2ddd3;
  --dark: #131217;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
}

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

h1,
h2,
h3 {
  margin: 0;
}

p {
  margin: 0;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.2rem;
}

/* Header */
.header {
  background: #fff;
  color: var(--ink);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(19, 18, 23, 0.08);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 42px;
  display: block;
}

.nav {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  justify-content: flex-end;
  gap: 1.6rem;
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.nav a {
  color: #6b675f;
  transition: color 0.2s;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(120deg, rgba(19, 18, 23, 0.88), rgba(19, 18, 23, 0.62)),
    url("images/hero-building.jpg") center 35% / cover no-repeat;
  color: #fff;
  padding: 9rem 1.2rem 8rem;
  text-align: center;
}

.hero-content {
  max-width: 720px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 1.2rem;
  line-height: 1.4;
  font-weight: 700;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.hero-text {
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto 2rem;
  opacity: 0.92;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

.btn {
  display: inline-block;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  font-weight: 600;
  transition:
    transform 0.2s,
    opacity 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

/* Services */
.services {
  padding: 4.5rem 1.2rem 4rem;
  background: #fff;
}

.services h2 {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 2.5rem;
  color: var(--ink);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(19, 18, 23, 0.05);
}

.card-body {
  padding: 1.8rem;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
  color: var(--accent);
}

.card p {
  font-size: 0.92rem;
  color: #555;
}

/* About */
.about {
  padding: 4rem 1.2rem;
}

.about h2 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  color: var(--ink);
  text-align: center;
}

.about-content {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.about-content p {
  font-size: 1rem;
  color: #555;
  margin-bottom: 0.8rem;
}

.about > .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.link {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.2rem;
  transition: opacity 0.2s;
}

.link:hover {
  opacity: 0.75;
}

/* CTA */
.cta {
  background: var(--dark);
  color: #fff;
  padding: 3.5rem 1.2rem;
  text-align: center;
}

.cta h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

/* Footer */
.footer {
  background: var(--dark);
  color: #8a8578;
  padding: 2rem 1.2rem;
  text-align: center;
  font-size: 0.85rem;
}

/* Page hero (inner pages) */
.page-hero {
  position: relative;
  color: #fff;
  padding: 6.5rem 1.2rem 3rem;
  background-size: cover;
  background-position: center 35%;
  background-repeat: no-repeat;
  background-image: linear-gradient(120deg, rgba(19, 18, 23, 0.88), rgba(19, 18, 23, 0.6)),
    url("images/hero-building.jpg");
}

.page-hero-title {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.55);
}

.lead {
  max-width: 720px;
  margin: 3rem auto 0;
  padding: 0 1.2rem;
  text-align: center;
  color: #555;
  font-size: 1.05rem;
}

.section-block {
  padding: 3.5rem 1.2rem;
}

.section-block + .section-block {
  border-top: 1px solid var(--line);
}

.prose {
  max-width: 760px;
  margin: 0 auto;
}

.prose h2 {
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  color: var(--ink);
}

.prose p {
  margin-bottom: 1rem;
  color: #444;
}

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

/* Company overview table */
.overview-table {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1rem 1.5rem;
}

.overview-table dt {
  font-weight: 600;
  color: var(--ink);
}

.overview-table dd {
  margin: 0;
  color: #444;
}

@media (max-width: 600px) {
  .overview-table {
    grid-template-columns: 1fr;
    gap: 0.2rem 0;
  }

  .overview-table dt {
    margin-top: 1rem;
  }

  .overview-table dt:first-child {
    margin-top: 0;
  }
}

/* Contact form */
.form-group {
  margin-bottom: 1.3rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--ink);
  font-size: 0.92rem;
}

.form-required {
  color: #a8433f;
  font-size: 0.78rem;
  margin-left: 0.4rem;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--ink);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form-group textarea {
  min-height: 180px;
  resize: vertical;
}

.honeypot-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form-actions {
  text-align: center;
  margin-top: 1.8rem;
}

.form-note {
  font-size: 0.85rem;
  color: #777;
  margin-top: 1rem;
  text-align: center;
}

.form-error {
  background: #fdecea;
  color: #a8433f;
  border: 1px solid #f0c6c2;
  border-radius: 0.3rem;
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.5rem;
  font-size: 0.92rem;
}

.thanks-block {
  padding: 6rem 1.2rem;
  text-align: center;
}

.thanks-block h1 {
  font-size: 1.8rem;
  color: var(--ink);
  margin-bottom: 1rem;
}

.thanks-block p {
  color: #555;
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-inner {
    justify-content: center;
    text-align: center;
  }

  .nav {
    width: 100%;
    justify-content: center;
    gap: 0.8rem 1.1rem;
    font-size: 0.85rem;
  }

  .hero {
    padding: 6rem 1.2rem 5rem;
  }

  .services h2,
  .about h2,
  .cta h2 {
    font-size: 1.3rem;
  }

  .page-hero-title {
    font-size: 1.5rem;
  }
}

@media (min-width: 1100px) {
  .hero-content {
    max-width: 1080px;
  }
}