:root {
  --primary-bg: #f8f9fd;
  --secondary-bg: #fff;
  --accent-bg: #e0e4e8;
  --text-color: #2c3e50;
  --text-muted: #7f8c8d;
  --link-color: #3498db;
  --hover-color: #2980b9;
  --font: 'Roboto', sans-serif;
  --gap: 8px;
  --radius: 10px;
  --shadow: 0 4px 8px rgba(0,0,0,0.1);
  --transition: 0.3s ease;
}

/* Reset & Base */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth }
body {
  font-family: var(--font);
  color: var(--text-color);
  background: var(--primary-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header */
header {
  background: var(--secondary-bg);
  box-shadow: var(--shadow);
}
.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: calc(var(--gap)*2);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo img {
  max-height: 50px;
  border-radius: var(--radius);
  transition: transform var(--transition);
}
.logo img:hover { transform: scale(1.1) }
.nav-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 70px;
  left: 0;
  width: 60px;
  background: var(--secondary-bg);
  box-shadow: var(--shadow);
  border-top-right-radius: var(--radius);
  border-bottom-right-radius: var(--radius);
  transition: transform var(--transition);
}
.sidebar.closed {
  transform: translateX(-100%);
}
.nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: calc(var(--gap)*2);
  padding: var(--gap);
}
.nav__link {
  color: var(--text-muted);
  font-size: 1.2rem;
  display: flex;
  justify-content: center;
}
.nav__link:hover { color: var(--link-color) }

/* Main container */
.info-container {
  margin-left: 80px;
  padding: calc(var(--gap)*4) calc(var(--gap)*2);
  max-width: 1000px;
}

/* Headings */
h1, h2 { margin-bottom: calc(var(--gap)*1.5) }
h1 { font-size: 2rem }
h2 { font-size: 1.5rem; color: var(--text-muted) }

/* Map */
.map-container {
  height: 350px;
  border: 2px solid var(--accent-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--gap)*4);
}

/* Gallery */
.gallery-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin-bottom: calc(var(--gap)*4);
}
.gallery-slider {
  display: flex;
  transition: transform 0.5s ease;
}
.gallery-slider img {
  flex: 0 0 100%;
  object-fit: cover;
  cursor: pointer;
}
.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.4);
  border: none;
  padding: var(--gap);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  transition: background var(--transition);
}
.gallery-nav:hover { background: rgba(0,0,0,0.7) }
.gallery-nav.prev { left: var(--gap) }
.gallery-nav.next { right: var(--gap) }

/* Sections */
section {
  background: var(--secondary-bg);
  padding: calc(var(--gap)*2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--gap)*4);
}
.button {
  display: inline-block;
  text-decoration: none;
  background: var(--link-color);
  color: #fff;
  padding: var(--gap) calc(var(--gap)*2);
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}
.button:hover {
  background: var(--hover-color);
  transform: scale(1.05);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: calc(var(--gap)*3);
  right: calc(var(--gap)*3);
  background: var(--link-color);
  color: #fff;
  padding: var(--gap);
  border-radius: var(--radius);
  display: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.back-to-top:hover { background: var(--hover-color); transform: scale(1.1) }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border: 3px solid #fff;
  border-radius: var(--radius);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: block }
  .sidebar { transform: translateX(-100%) }
  .sidebar.open { transform: translateX(0) }
  .info-container { margin-left: 0; }
}