:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --header-bg: rgba(255, 255, 255, 0.9);
  --card-bg: #ffffff;
  --accent-color: #d4af37;
  --naver-green: #03c75a;
  --transition-speed: 0.4s;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  --hero-overlay: rgba(255, 255, 255, 0.8);
}

[data-theme='dark'] {
  --bg-color: #0f0f0f;
  --text-color: #e0e0e0;
  --header-bg: rgba(15, 15, 15, 0.9);
  --card-bg: #1a1a1a;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  --hero-overlay: rgba(0, 0, 0, 0.6);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-color);
  letter-spacing: -0.05rem;
}

.sub-logo {
  font-size: 1rem;
  font-weight: 300;
  margin-left: 0.5rem;
  opacity: 0.7;
}

.theme-toggle-mini {
  background: none;
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hero Gallery Section */
.hero-gallery {
  padding: 120px 2rem 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-container {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: center;
}

.hero-text-overlay {
  text-align: center;
}

.hero-text-overlay h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 900;
  color: var(--accent-color);
}

.hero-text-overlay p {
  font-size: 1.2rem;
  opacity: 0.8;
}

.gallery-wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  width: 100%;
}

.gallery-item {
  height: 450px;
  border-radius: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  background-size: cover;
  background-position: center;
  border: 2px solid transparent;
}

.gallery-item:hover {
  transform: scale(1.03);
  border-color: var(--accent-color);
}

/* Representative branch images */
.item-1 { background-image: url('https://images.unsplash.com/photo-1514362545857-3bc16c4c7d1b?auto=format&fit=crop&q=80&w=800'); }
.item-2 { background-image: url('https://images.unsplash.com/photo-1559329007-40df8a9345d8?auto=format&fit=crop&q=80&w=800'); }
.item-3 { background-image: url('https://images.unsplash.com/photo-1579027989536-b7b218b0f47d?auto=format&fit=crop&q=80&w=800'); }

.gallery-label {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  backdrop-filter: blur(5px);
}

.branches {
  max-width: 1200px;
  margin: 0 auto 6rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  padding: 0 2rem;
}

.branch-card {
  background-color: var(--card-bg);
  border-radius: 1.5rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
  border: 1px solid rgba(212, 175, 55, 0.1);
}

.branch-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-color);
}

.branch-info {
  padding: 2.5rem;
}

.branch-info h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.branch-info .address {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  opacity: 0.8;
}

.branch-info .naver-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--naver-green);
  color: white;
  text-decoration: none;
  padding: 1rem;
  border-radius: 0.75rem;
  font-weight: 600;
  gap: 0.5rem;
}

.naver-logo {
  height: 18px;
  filter: brightness(0) invert(1);
}

footer {
  text-align: center;
  padding: 4rem 2rem;
  background-color: var(--card-bg);
  opacity: 0.7;
}

@media (max-width: 992px) {
  .gallery-wrapper {
    grid-template-columns: 1fr;
  }
  .gallery-item {
    height: 300px;
  }
}