@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

:root {
    --sidebar-bg: rgba(255, 255, 255, 0.5);
    --sidebar-bg-hover: rgba(255, 255, 255, 1);
    --sidebar-border: rgba(0, 0, 0, 0.05);
    --sidebar-radius: 16px;
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.12);
    --text-main: #2d3748;
    --text-muted: #4a5568;
    --accent: #2d3748;
    --accent-soft: rgba(0, 0, 0, 0.05);
    --accent-active: rgba(0, 0, 0, 0.08);
    --hover-bg: rgba(0, 0, 0, 0.05);
    --transition-fast: 0.18s ease-out;
    --transition-soft: 0.25s ease-out;
    --font-sans: Roboto, "Segoe UI", sans-serif;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  html,
  body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: var(--font-sans);
  }
  
  .tour-page {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background: #000;
  }
  
  .tour-wrapper {
    position: absolute;
    inset: 0;
  }
  
  .tour-wrapper iframe {
    width: 100%;
    height: 100%;
    border: none;
  }
  
  .sidebar {
    position: absolute;
    top: 24px;
    left: 24px;
    z-index: 10;
    width: 200px;
    padding:20px 16px;
    border-radius: var(--sidebar-radius);
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: background 0.3s ease-out, transform 0.3s ease-out, opacity 0.3s ease-out;
    transform: translateX(0);
    opacity: 1;
  }
  
  .sidebar:hover {
    background: var(--sidebar-bg-hover);
  }
  
  .sidebar-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-bottom: 0;
    border-bottom: none;
    margin-bottom: 0;
    padding-top: 0;
  }
  
  .logo-box {
    display: inline-flex;
    padding: 0;
    border-radius: 0;
    border: none;
    background: transparent;
  }

  .logo-image {
    max-width: 100%;
    width: 100%;
    object-fit: cover;
    padding: 0 10px;
  }
  
  .sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  
  .menu-group {
    border-radius: 8px;
    background: transparent;
    overflow: hidden;
    border: 1px solid transparent;
    transition: background 0.25s ease-out;
  }
  
  .menu-group.is-open {
    background: transparent;
  }
  
  .menu-group + .menu-group {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding-top: 8px;
    margin-top: 0;
    border-radius: 0;
  }
  
  .menu-group-header {
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s ease-out;
  }
  
  .menu-group-header:hover {
    background: var(--hover-bg);
  }
  
  .caret {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 1.5px solid var(--text-muted);
    border-bottom: 1.5px solid var(--text-muted);
    transform: rotate(45deg);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 8px;
    flex-shrink: 0;
  }
  
  .menu-group.is-open .caret {
    transform: rotate(225deg);
  }
  
  .menu-items {
    list-style: none;
    margin: 0;
    padding: 4px 0 8px 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s ease-out,
                padding 0.3s ease-out;
  }
  
  .menu-group.is-open .menu-items {
    max-height: 500px;
    opacity: 1;
    padding: 4px 0 8px 0;
  }
  
  .menu-item {
    margin: 0;
  }
  
  .menu-item button {
    width: 100%;
    padding: 8px 12px;
    border-radius: 6px;
    border: none;
    background: transparent;
    text-align: left;
    font-size: 0.9rem;
    color: var(--text-main);
    cursor: pointer;
    transition: background 0.2s ease-out, color 0.2s ease-out;
    font-weight: 400;
  }
  
  .menu-item button:hover {
    background: var(--hover-bg);
    color: var(--text-main);
  }
  
  .menu-item.is-active button {
    background: var(--hover-bg);
    color: var(--text-main);
    font-weight: 500;
  }
  
  .hamburger-icon {
    position: absolute;
    top: 24px;
    left: 234px;
    z-index: 20;
    width: 40px;
    height: 40px;
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 8px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: background 0.3s ease-out, left 0.3s ease-out;
  }

  .hamburger-icon.change {
    left: 24px;
  }

  .hamburger-icon:hover {
    background: var(--sidebar-bg-hover);
  }

  .hamburger-icon span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--text-main);
    transition: 0.3s;
    border-radius: 2px;
  }

  /* Default state: X shape (menu open) */
  .hamburger-icon span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger-icon span:nth-child(2) {
    opacity: 0;
  }

  .hamburger-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* When menu is closed: 3 stripes */
  .hamburger-icon.change span:nth-child(1) {
    transform: rotate(0) translate(0, 0);
  }

  .hamburger-icon.change span:nth-child(2) {
    opacity: 1;
  }

  .hamburger-icon.change span:nth-child(3) {
    transform: rotate(0) translate(0, 0);
  }

  .sidebar.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-100%);
  }

  .sidebar {
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
  }