:root {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e5e7eb;
  --text-normal: #374151;
  --text-muted: #6b7280;
  --text-header: #111827;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-secondary: #14b8a6;
  --green: #10b981;
  --red: #ef4444;
  --gold: #f59e0b;
  --font-primary: "Inter", sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-normal);
  font-family: var(--font-primary);
  margin: 0;
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar start*/

/* Mobile Menu Toggle Button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--text-header);
  transition: all 0.3s ease;
  margin-right: 12px;
}

.menu-toggle:hover {
  background-color: var(--bg-tertiary);
  transform: scale(1.05);
}

.menu-toggle .material-icons {
  font-size: 24px;
  display: block;
}

/* Sidebar Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* Sidebar Close Button (Mobile Only) */
.sidebar-close {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
  transition: color 0.2s ease;
}

.sidebar-close:hover {
  color: var(--text-header);
}

.sidebar-close .material-icons {
  font-size: 24px;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  padding: 10px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-md);
  border-right: 1px solid var(--bg-tertiary);
}

.sidebar-header {
  color: var(--text-header);
  font-weight: bold;
  font-size: 1.2rem;
  padding: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--bg-tertiary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.category-list {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 10px;
}

.category-section-label {
  text-transform: uppercase;
  font-size: 12px;
  font-weight: bold;
  color: var(--text-muted);
  padding: 8px 10px;
  margin-top: 10px;
}

.category-item {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  color: #8e9297;
  margin-bottom: 2px;
  text-decoration: none;
  font-weight: 500;
}

.category-item:hover {
  background-color: rgba(99, 102, 241, 0.08);
  color: var(--accent);
}

.category-item.active {
  background-color: rgba(99, 102, 241, 0.15);
  color: var(--accent);
  font-weight: 600;
}

.user-panel {
  background-color: var(--bg-tertiary);
  padding: 10px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

/* Responsive Styles */

/* Tablet and Mobile */
@media screen and (max-width: 768px) {
  /* Show menu toggle button */
  .menu-toggle {
    display: block;
  }

  /* Hide sidebar by default on mobile */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 999;
    transform: translateX(-100%);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.3);
  }

  /* Show sidebar when active */
  .sidebar.active {
    transform: translateX(0);
  }

  /* Show close button on mobile */
  .sidebar-close {
    display: block;
  }

  /* Adjust main content to full width */
  .main-content {
    margin-left: 0;
  }

  /* Adjust top bar for menu button */
  .top-bar {
    padding-left: 16px;
  }

  /* Prevent body scroll when sidebar is open */
  body.sidebar-open {
    overflow: hidden;
    height: 100vh;
  }

  /* Hide search box on mobile to save space */
  .search-box {
    display: none;
  }

  /* Notification dropdown responsive */
  .notification-dropdown {
    position: fixed !important;
    top: 60px !important;
    right: 8px !important;
    left: 8px !important;
    width: auto !important;
    max-width: none !important;
    max-height: 70vh;
  }

  /* Adjust top bar title size on mobile */
  .top-bar h3 {
    font-size: 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
  }
}

/* Small Mobile Devices */
@media screen and (max-width: 480px) {
  .sidebar {
    width: 280px;
    max-width: 80vw;
  }

  .top-bar h3 {
    font-size: 14px;
  }

  .top-bar form {
    max-width: 150px;
  }

  .top-bar form input {
    font-size: 12px;
  }
}

/* Desktop - Ensure sidebar is always visible */
@media screen and (min-width: 769px) {
  .sidebar {
    position: relative;
    transform: translateX(0);
  }

  .menu-toggle {
    display: none;
  }

  .sidebar-overlay {
    display: none !important;
  }

  .sidebar-close {
    display: none;
  }
}

/* Sidebar end*/

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  min-width: 0;
  /* Prevent flex overflow */
}

.top-bar {
  height: 48px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--bg-tertiary);
  display: flex;
  align-items: center;
  padding: 0 16px;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

/* Notification */
.notification-container {
  position: relative;
}

.notification-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-muted);
}

.notification-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 360px;
  max-height: 500px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  z-index: 9999;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid var(--bg-tertiary);
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-normal);
  outline: none;
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
}

.content-feed {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

/* Components */
.btn {
  background-color: var(--accent);
  color: white;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  text-decoration: none;
  font-size: 14px;
  display: inline-block;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: #4f545c;
}

.btn-secondary:hover {
  background-color: #5d6269;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.thread-card {
  background-color: var(--bg-secondary);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--bg-tertiary);
}

.thread-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-image {
  height: 160px;
  width: 100%;
  object-fit: cover;
  background-color: var(--bg-tertiary);
  position: relative;
}

.card-content {
  padding: 12px;
}

.card-title {
  color: var(--text-header);
  font-weight: 600;
  margin: 0 0 8px 0;
  font-size: 16px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  align-items: center;
}

.card-badge {
  background-color: transparent;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.badge-lost {
  color: var(--red);
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--red);
}

.badge-found {
  color: var(--green);
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--green);
}

/* Subcategory List */
.subcategory-list {
  display: none;
  margin-left: 12px;
  border-left: 2px solid var(--accent);
  padding-left: 8px;
  margin-bottom: 8px;
}

.subcategory-list.expanded {
  display: block;
}