:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-ink: #1f262c;
  --color-ink-soft: #4a545c;
  --color-line: #cfd4d8;
  --color-line-soft: #e3e6e9;
  --color-steel: #455a64;
  --color-steel-dark: #2e3a40;
  --color-accent: #8a6a3a;
  --max-width: 960px;
  --max-width-narrow: 680px;
  --font-jp: "Noto Serif JP", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  --font-en: "Cormorant Garamond", "Noto Serif JP", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.site-header {
  background: var(--color-steel-dark);
  color: #fff;
  padding: 20px 0;
  border-bottom: 3px solid var(--color-accent);
}

.site-header__name {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.site-header__name-en {
  margin: 2px 0 0;
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: #b6bec3;
}

.hero {
  background-color: var(--color-steel);
  background-image:
    linear-gradient(rgba(46, 58, 64, 0.78), rgba(46, 58, 64, 0.9)),
    url("/assets/images/hero-bg.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
  padding: 120px 0 112px;
  border-bottom: 1px solid var(--color-line);
  position: relative;
}

.hero::after {
  content: "";
  display: block;
  width: 60px;
  height: 2px;
  background: var(--color-accent);
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 50%);
}

.hero__est {
  margin: 0 0 12px;
  font-family: var(--font-en);
  letter-spacing: 0.3em;
  font-size: 14px;
  color: var(--color-accent);
  text-transform: uppercase;
}

.hero__title {
  margin: 0 0 16px;
  font-size: 38px;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.hero__sub {
  margin: 0;
  font-size: 16px;
  color: #d9dde0;
  letter-spacing: 0.05em;
}

.section {
  padding: 88px 0;
  background: var(--color-bg);
}

.section--contact {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line-soft);
  border-bottom: 1px solid var(--color-line-soft);
}

.section__title {
  margin: 0 0 48px;
  font-size: 24px;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: var(--color-ink);
  position: relative;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
}

.section__title--center {
  text-align: center;
  padding-left: 0;
  border-left: 0;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.section__title-en {
  display: block;
  margin-top: 4px;
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--color-ink-soft);
  font-weight: 400;
  text-transform: uppercase;
}

.info {
  margin: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-line-soft);
}

.info__row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0;
  border-bottom: 1px solid var(--color-line-soft);
}

.info__row:last-child {
  border-bottom: 0;
}

.info__term {
  margin: 0;
  padding: 20px 24px;
  background: #f8f9fb;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-ink-soft);
  letter-spacing: 0.1em;
  border-right: 1px solid var(--color-line-soft);
}

.info__desc {
  margin: 0;
  padding: 20px 24px;
  font-size: 15px;
  color: var(--color-ink);
}

.info__list {
  margin: 0;
  padding-left: 1.2em;
}

.info__list li {
  margin-bottom: 4px;
}

.info__list li:last-child {
  margin-bottom: 0;
}

.contact__lead {
  margin: 0 0 32px;
  text-align: center;
  color: var(--color-ink-soft);
}

.contact__action {
  margin: 0;
  text-align: center;
}

.button {
  display: inline-block;
  padding: 16px 56px;
  background: var(--color-steel-dark);
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 0.2em;
  border: 1px solid var(--color-steel-dark);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

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

.site-footer {
  background: var(--color-steel-dark);
  color: #b6bec3;
  padding: 24px 0;
  text-align: center;
}

.site-footer__copy {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.15em;
  font-family: var(--font-en);
}

@media (max-width: 640px) {
  .hero {
    padding: 64px 0 60px;
  }

  .hero__title {
    font-size: 28px;
  }

  .section {
    padding: 64px 0;
  }

  .section__title {
    margin-bottom: 32px;
    font-size: 20px;
  }

  .info__row {
    grid-template-columns: 1fr;
  }

  .info__term {
    border-right: 0;
    border-bottom: 1px solid var(--color-line-soft);
    padding: 12px 20px;
  }

  .info__desc {
    padding: 16px 20px;
  }

  .button {
    padding: 14px 40px;
    letter-spacing: 0.15em;
  }
}