:root {
  --green-900: #0d2a22;
  --green-800: #123b30;
  --green-700: #1b4d3e;
  --green-600: #235c4a;
  --green-100: #e7f0ec;
  --gold: #c2a36b;
  --text: #1f2421;
  --text-light: #5c6660;
  --bg: #ffffff;
  --bg-alt: #f4f7f5;
  --max: 1080px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 90%;
  max-width: var(--max);
  margin: 0 auto;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(13, 42, 34, 0.92);
  backdrop-filter: blur(6px);
  z-index: 100;
}

.header__inner {
  width: 90%;
  max-width: var(--max);
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.nav__list {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav__list a {
  color: #fff;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  position: relative;
  transition: color 0.25s;
}

.nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.25s;
}

.nav__list a:hover {
  color: var(--gold);
}

.nav__list a:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  background:
    linear-gradient(rgba(13, 42, 34, 0.78), rgba(13, 42, 34, 0.88)),
    radial-gradient(circle at 30% 20%, var(--green-600), var(--green-900));
  padding: 100px 20px 60px;
}

.hero__sub {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.6rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 18px;
}

.hero__title {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.hero__lead {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
}

.btn {
  display: inline-block;
  padding: 14px 40px;
  border: 1px solid var(--gold);
  color: var(--gold);
  letter-spacing: 0.1em;
  font-size: 0.9rem;
  transition: background 0.3s, color 0.3s;
}

.btn:hover {
  background: var(--gold);
  color: var(--green-900);
}

/* ===== Section ===== */
.section {
  padding: 96px 0;
}

.section--alt {
  background: var(--bg-alt);
}

.section__head {
  text-align: center;
  margin-bottom: 56px;
}

.section__en {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 6px;
}

.section__title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--green-800);
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}

.section__title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background: var(--green-700);
}

/* ===== About ===== */
.about-table {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  border-collapse: collapse;
}

.about-table th,
.about-table td {
  text-align: left;
  padding: 20px 16px;
  border-bottom: 1px solid #dde5e1;
  vertical-align: top;
}

.about-table th {
  width: 160px;
  color: var(--green-700);
  font-weight: 700;
  white-space: nowrap;
}

.about-table a {
  color: var(--green-700);
  text-decoration: underline;
}

/* ===== Service ===== */
.service-list {
  max-width: 820px;
  margin: 0 auto;
  list-style: none;
  counter-reset: service;
}

.service-list li {
  counter-increment: service;
  position: relative;
  padding: 20px 16px 20px 64px;
  border-bottom: 1px solid #dde5e1;
}

.service-list li::before {
  content: counter(service, decimal-leading-zero);
  position: absolute;
  left: 12px;
  top: 18px;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold);
}

.service-note {
  max-width: 820px;
  margin: 20px auto 0;
  padding-left: 16px;
  color: var(--text-light);
}

/* ===== Contact ===== */
.contact__text {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 32px;
}

.btn--contact {
  display: block;
  width: fit-content;
  margin: 0 auto;
  border-color: var(--green-700);
  color: var(--green-700);
  font-size: 1rem;
}

.btn--contact:hover {
  background: var(--green-700);
  color: #fff;
}

/* ===== Footer ===== */
.footer {
  background: var(--green-900);
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 28px 16px;
}

.footer__copy {
  font-size: 0.82rem;
  letter-spacing: 0.05em;
}

/* ===== Page top ===== */
.pagetop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green-700);
  color: #fff;
  font-size: 0.8rem;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, background 0.3s;
}

.pagetop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.pagetop:hover {
  background: var(--green-900);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
    z-index: 110;
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--green-900);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 105;
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    gap: 36px;
    text-align: center;
  }

  .nav__list a {
    font-size: 1.2rem;
  }

  .nav__toggle.is-active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  .nav__toggle.is-active span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.is-active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .section {
    padding: 72px 0;
  }

  .about-table th {
    width: 110px;
    font-size: 0.9rem;
  }
}