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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: var(--font-md);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
  flex-shrink: 0;
  transition: var(--transition);
}

.brand {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  font-size: 26px;
  line-height: 1;
}

.brand-info h1 {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.brand-info span {
  font-size: var(--font-xs);
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-menu {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
  list-style: none;
}

.nav-item {
  margin-bottom: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-sm);
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}

.nav-link:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.nav-link.active {
  background: linear-gradient(90deg, var(--primary), #f0853f);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(232, 93, 58, 0.35);
}

.nav-icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-badge-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--gold));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-xs);
  color: #fff;
}

.admin-name {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.admin-role {
  font-size: var(--font-xs);
  color: var(--text-muted);
}

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

/* Topbar */
.topbar {
  height: 64px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(12px);
}

.topbar-title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Page Container */
.page-container {
  flex: 1;
  padding: 28px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    width: 72px;
  }
  .brand-info, .nav-text, .admin-meta {
    display: none;
  }
  .brand {
    justify-content: center;
    padding: 20px 0;
  }
  .nav-link {
    justify-content: center;
    padding: 12px 0;
  }
  .page-container {
    padding: 16px;
  }
}