/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1a365d;
  --color-primary-light: #2c5282;
  --color-accent: #c53030;
  --color-accent-hover: #9b2c2c;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-bg: #f7fafc;
  --color-white: #ffffff;
  --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.nav-toggle::before { top: 8px; }
.nav-toggle::after { bottom: 8px; }

.nav-toggle span {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--color-primary);
  transform: translateY(-50%);
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 280px;
    height: 100vh;
    background: var(--color-white);
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    padding: 4rem 1.5rem 1.5rem;
    transition: right var(--transition);
  }

  .nav.is-open { right: 0; }

  .nav ul {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-toggle {
    display: block;
  }
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero-inner {
  max-width: 700px;
  margin: 0 auto;
}

.hero-catch {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.hero-sub {
  font-size: 1rem;
  opacity: 0.9;
  font-weight: 400;
}

@media (min-width: 768px) {
  .hero {
    padding: 5rem 1.5rem;
  }
  .hero-catch {
    font-size: 1.85rem;
  }
  .hero-sub {
    font-size: 1.1rem;
  }
}

/* ===== Sections ===== */
.section {
  padding: 3.5rem 1.5rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--color-primary);
  display: inline-block;
}

/* ===== Company ===== */
.company {
  background: var(--color-white);
}

.company-list {
  display: grid;
  gap: 1rem 1.5rem;
}

.company-list dt {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
  grid-column: 1;
  min-width: 140px;
}

.company-list dd {
  margin: 0;
  grid-column: 2;
  color: var(--color-text);
}

@media (min-width: 600px) {
  .company-list {
    grid-template-columns: auto 1fr;
  }
}

@media (max-width: 599px) {
  .company-list dt {
    margin-top: 0.5rem;
    margin-bottom: 0.15rem;
  }
  .company-list dt:first-child { margin-top: 0; }
}

/* ===== Business ===== */
.business-text {
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.business-features {
  list-style: none;
  padding-left: 0;
}

.business-features li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.business-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* ===== Locations ===== */
.locations {
  background: var(--color-white);
}

.location-cards {
  display: grid;
  gap: 1.5rem;
}

.location-card {
  background: var(--color-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
}

.location-card:hover {
  box-shadow: var(--shadow-lg);
}

.location-card h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.location-address,
.location-tel,
.location-fax {
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 0.35rem;
  line-height: 1.7;
}

.location-main {
  border-left: 4px solid var(--color-primary);
}

@media (min-width: 600px) {
  .location-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .location-main {
    grid-column: span 3;
  }
}

/* ===== Contact ===== */
.contact-info {
  background: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-info p {
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.contact-tel {
  font-size: 1.25rem;
  margin-top: 1rem !important;
}

.contact-tel a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-address {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer-company {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.footer-license {
  font-size: 0.85rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.8rem;
  opacity: 0.75;
}