:root {
  --deep-green: #123b2a;
  --green: #2e6b47;
  --light-green: #93c96b;
  --soft-green: #eaf4e4;
  --white: #ffffff;
  --text: #1b1f1c;
  --subtext: #4b5550;
  --border: rgba(18, 59, 42, 0.12);
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.08);
  --radius: 18px;
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fcf7 48%, #eef7ea 100%);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Hiragino Sans",
    "Meiryo", sans-serif;
  line-height: 1.8;
}

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

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

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(820px, calc(100% - 40px));
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  backdrop-filter: blur(14px);
  background: rgba(10, 26, 18, 0.58);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.logo-icon {
  width: 42px;
  height: 42px;
  object-fit: contain;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--light-green);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background: var(--white);
  transition: 0.2s ease;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background:
    url("images/hero.png") center center / cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg,
      rgba(8, 23, 16, 0.82) 0%,
      rgba(10, 36, 24, 0.62) 34%,
      rgba(12, 43, 29, 0.35) 62%,
      rgba(12, 43, 29, 0.16) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 110px;
  padding-bottom: 80px;
  color: var(--white);
}

.hero-subtitle {
  margin: 0 0 10px;
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.72);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 5.4rem);
  line-height: 1.08;
  letter-spacing: 0.04em;
}

.hero-lead {
  margin: 22px 0 0;
  max-width: 620px;
  font-size: clamp(1rem, 2.1vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 9999px;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--light-green), var(--green));
  color: var(--white);
  box-shadow: 0 12px 26px rgba(46, 107, 71, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.34);
}

.section {
  padding: 96px 0;
}

.section-heading {
  margin-bottom: 40px;
}

.section-heading.center {
  text-align: center;
}

.section-label {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.section-heading h2,
.placeholder-section h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.2;
}

.intro {
  background: transparent;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 36px;
  align-items: start;
}

.intro-main p {
  margin: 0 0 20px;
  font-size: 1.06rem;
  color: var(--subtext);
}

.intro-questions {
  display: grid;
  gap: 14px;
}

.question-card {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  font-weight: 600;
}

.intro-message {
  margin-top: 36px;
  padding: 28px;
  background: linear-gradient(135deg, #ffffff, #f4faef);
  border-left: 5px solid var(--green);
  border-radius: 0 16px 16px 0;
  box-shadow: var(--shadow);
}

.intro-message p {
  margin: 0 0 16px;
  color: var(--subtext);
}

.intro-message p:last-child {
  margin-bottom: 0;
}

.strong-message {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--deep-green) !important;
}

.services {
  background:
    linear-gradient(180deg, rgba(18, 59, 42, 0.04) 0%, rgba(147, 201, 107, 0.08) 100%);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card,
.principle-card {
  padding: 30px 26px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.service-card:hover,
.principle-card:hover,
.quick-link:hover {
  transform: translateY(-4px);
  border-color: rgba(46, 107, 71, 0.3);
}

.service-card h3,
.principle-card h3 {
  margin: 0 0 14px;
  font-size: 1.3rem;
  color: var(--deep-green);
}

.service-card p,
.principle-card p {
  margin: 0;
  color: var(--subtext);
}

.card-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--green);
  font-weight: 700;
}

.principles {
  background: transparent;
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.quick-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 86px;
  padding: 18px;
  text-align: center;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  font-weight: 700;
  color: var(--deep-green);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.placeholder-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

.placeholder-section p {
  color: var(--subtext);
}

.contact-section {
  text-align: center;
  background:
    linear-gradient(135deg, rgba(18, 59, 42, 0.94), rgba(46, 107, 71, 0.92));
  color: var(--white);
}

.contact-section .section-label,
.contact-section h2,
.contact-text {
  color: var(--white);
}

.contact-text {
  margin: 0 auto 24px;
  max-width: 620px;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.contact-note {
  margin-top: 18px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
}

.site-footer {
  background: #0e2117;
  color: rgba(255, 255, 255, 0.72);
}

.footer-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

@media (max-width: 1024px) {
  .nav {
    gap: 14px;
  }

  .nav a {
    font-size: 0.88rem;
  }

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

  .quick-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 820px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 20px 20px;
    background: rgba(11, 28, 19, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    width: 100%;
    padding: 12px 0;
  }

  .hero {
    background-position: 64% center;
  }

  .hero-content {
    padding-top: 120px;
    padding-bottom: 70px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    max-width: 320px;
  }

  .section {
    padding: 78px 0;
  }
}

@media (max-width: 560px) {

  .container,
  .narrow {
    width: min(100% - 28px, var(--max-width));
  }

  .header-inner {
    min-height: 68px;
  }

  .nav {
    top: 68px;
  }

  .logo {
    font-size: 1.08rem;
  }

  .logo-icon {
    width: 34px;
    height: 34px;
  }

  .hero {
    min-height: 92svh;
    background-position: 68% center;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg,
        rgba(8, 23, 16, 0.8) 0%,
        rgba(10, 36, 24, 0.55) 50%,
        rgba(12, 43, 29, 0.35) 100%);
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .intro-message {
    padding: 22px;
  }

  .quick-links-grid {
    grid-template-columns: 1fr;
  }
}