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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.5;
}

.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background: #fff;
  border-right: 1px solid #e2e8f0;
  padding: 1rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  margin-bottom: 1.5rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: #6366f1;
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
}

.logo-text {
  font-weight: 600;
  font-size: 1rem;
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin-bottom: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  color: #64748b;
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.nav-link:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.nav-link.active {
  background: #6366f1;
  color: #fff;
}

.nav-icon {
  width: 20px;
  height: 20px;
}

/* Main Content */
.main {
  flex: 1;
  margin-left: 250px;
  padding: 2rem;
}

.page-header {
  margin-bottom: 1.5rem;
}

.page-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: #1e293b;
}

.page-subtitle {
  color: #64748b;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  padding: 1.25rem;
}

.card-header {
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: #1e293b;
}

.card-subtitle {
  font-size: 0.75rem;
  color: #64748b;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
}

.stat-value.green { color: #16a34a; }
.stat-value.red { color: #dc2626; }
.stat-value.blue { color: #2563eb; }

.stat-label {
  font-size: 0.75rem;
  color: #64748b;
}

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr; }
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
  font-size: 0.875rem;
}

.table th {
  font-weight: 500;
  color: #64748b;
  background: #f8fafc;
}

.table td {
  color: #1e293b;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-green { background: #dcfce7; color: #16a34a; }
.badge-yellow { background: #fef9c3; color: #ca8a04; }
.badge-red { background: #fee2e2; color: #dc2626; }
.badge-blue { background: #dbeafe; color: #2563eb; }
.badge-gray { background: #f1f5f9; color: #64748b; }

/* Avatar */
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: #64748b;
}

.avatar-sm {
  width: 28px;
  height: 28px;
  font-size: 0.625rem;
}

/* Flex utilities */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }

/* List items */
.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid #f1f5f9;
}

.list-item:last-child {
  border-bottom: none;
}

/* Announcements */
.announcement {
  border-left: 3px solid #6366f1;
  padding-left: 1rem;
  margin-bottom: 1rem;
}

.announcement:last-child {
  margin-bottom: 0;
}

.announcement-title {
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.announcement-text {
  font-size: 0.75rem;
  color: #64748b;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: #6366f1;
  color: #fff;
}

.btn-primary:hover {
  background: #4f46e5;
}

.btn-outline {
  background: #fff;
  border: 1px solid #e2e8f0;
  color: #1e293b;
}

.btn-outline:hover {
  background: #f8fafc;
}

/* Search */
.search-input {
  padding: 0.5rem 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  font-size: 0.875rem;
  width: 300px;
}

.search-input:focus {
  outline: none;
  border-color: #6366f1;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  width: 44px;
  height: 44px;
  background: #6366f1;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1.5rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn:hover {
  background: #4f46e5;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
}

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

/* Responsive */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
  }

  .sidebar.active {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
    padding: 1rem;
    padding-top: 4.5rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-header .flex.gap-2 {
    flex-wrap: wrap;
    margin-top: 1rem;
  }

  .page-header .flex.gap-2 .btn {
    flex: 1 1 45%;
    justify-content: center;
    font-size: 0.75rem;
    padding: 0.5rem;
  }

  .page-header.flex {
    flex-direction: column;
    align-items: flex-start;
  }
}