:root {
  --bg-color: #0c0c0c;
  --bg-darker: #050505;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --accent-gold: #c5a059;
  --accent-gold-light: #e0c28d;
  --section-padding: 80px 20px;
  --border-color: rgba(197, 160, 89, 0.3);
}

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

body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: 0.3s;
}

ul {
  list-style: none;
}

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

/* Responsive Utilities */
.pc-only {
  display: block;
}

.sp-only {
  display: none;
}

@media (max-width: 768px) {
  .pc-only {
    display: none;
  }

  .sp-only {
    display: block;
  }
}

/* Layout Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: var(--section-padding);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--accent-gold);
  margin-bottom: 10px;
  letter-spacing: 0.1em;
}

.section-title span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(12, 12, 12, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.nav-links a:hover {
  color: var(--accent-gold);
}

/* Hero Section */
.hero {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../img/line_oa_chat_260128_202755_group_0.jpg') center/cover no-repeat;
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 20px;
  letter-spacing: 0.2em;
  text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.8);
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 40px;
  color: var(--text-secondary);
}

.btn-cta {
  display: inline-block;
  padding: 15px 40px;
  background-color: var(--accent-gold);
  color: #000;
  font-weight: bold;
  border-radius: 4px;
  transition: 0.3s;
}

.btn-cta:hover {
  background-color: var(--accent-gold-light);
  transform: translateY(-2px);
}

/* Concept Section */
.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.concept-text h3 {
  font-size: 2rem;
  color: var(--accent-gold);
  margin-bottom: 20px;
}

.concept-image img {
  border: 1px solid var(--border-color);
  padding: 10px;
}

/* Mama Section */
.mama-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.mama-image img {
  border: 1px solid var(--border-color);
  padding: 10px;
  width: 100%;
  border-radius: 4px;
}

.mama-text .lead {
  font-size: 1.2rem;
  color: var(--accent-gold);
  margin-bottom: 20px;
  font-weight: 500;
}

.mama-text p {
  margin-bottom: 20px;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: var(--bg-darker);
  padding: 40px 30px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: 0.3s;
}

.feature-card:hover {
  border-color: var(--accent-gold);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--accent-gold);
  margin-bottom: 20px;
}

/* Gallery Section */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.gallery-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: 0.5s;
}

@media (max-width: 768px) {
  .gallery-item img {
    height: 150px;
  }
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* Info Section */
.info-container {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  padding: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
}

.info-table th {
  color: var(--accent-gold);
  width: 150px;
}

.contact-card {
  background-color: var(--bg-darker);
  padding: 30px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.phone-number {
  font-size: 1.8rem;
  color: var(--accent-gold);
  margin: 15px 0;
  display: block;
}

/* Access Section */
.access-map {
  margin-top: 30px;
  border: 1px solid var(--border-color);
}

.access-map iframe {
  width: 100%;
  height: 450px;
  vertical-align: bottom;
}

/* Footer */
footer {
  background-color: var(--bg-darker);
  padding: 60px 20px;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer-logo {
  margin-bottom: 20px;
}

.footer-logo a {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
}

.sns-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
}

.sns-links a {
  font-size: 1.5rem;
  color: var(--accent-gold);
}

/* Responsive */
@media (max-width: 991px) {
  .hero-content h1 {
    font-size: 3rem;
  }

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

  .mama-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .info-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .header-phone .btn-cta {
    padding: 8px 12px !important;
    font-size: 0.75rem !important;
    white-space: nowrap;
  }

  .header-phone .btn-cta i {
    margin-right: 4px;
  }

  .nav-container {
    padding: 0 15px;
  }

  .logo a {
    font-size: 1.1rem;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .concept-text h3 {
    font-size: 1.5rem;
    line-height: 1.4;
  }

  .info-table th,
  .info-table td {
    padding: 12px 10px;
    font-size: 0.9rem;
  }

  .info-table th {
    width: 90px;
  }

  .contact-card {
    padding: 20px;
  }

  .contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
  }

  .contact-card p {
    font-size: 0.9rem;
  }

  .phone-number {
    font-size: 1.5rem !important;
  }

  .section {
    padding: 50px 20px;
  }
}