/* Grid Container */
.app-container {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 70px 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  background-color: var(--bg-sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: flex-direction;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem 1rem;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
}

.sidebar-brand {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--sidebar-text-active);
  letter-spacing: -0.025em;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.sidebar-item a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--sidebar-text);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.sidebar-item a:hover,
.sidebar-item.active a {
  background-color: var(--bg-sidebar-hover);
  color: var(--sidebar-text-active);
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1rem;
}

/* Topbar */
.topbar {
  grid-area: topbar;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  position: sticky;
  top: 0;
  z-index: 90;
  box-shadow: var(--shadow-sm);
}

.search-bar {
  display: flex;
  align-items: center;
  background-color: var(--bg-app);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.4rem 1rem;
  width: 300px;
}

.search-bar input {
  border: none;
  background: transparent;
  outline: none;
  margin-left: 0.5rem;
  width: 100%;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.notification-bell {
  position: relative;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

.notification-bell:hover {
  background-color: var(--primary-light);
}

.notification-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background-color: var(--status-expired-text);
  color: white;
  font-size: 0.7rem;
  font-weight: bold;
  border-radius: var(--radius-full);
  padding: 1px 6px;
  border: 2px solid var(--bg-card);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  box-shadow: var(--shadow-sm);
}

/* Main Content Area */
.main-content {
  grid-area: main;
  padding: 2.5rem;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* Non-authenticated Full Page Layout (Login / Register) */
.full-page-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top right, var(--secondary-light) 0%, var(--bg-app) 100%);
  padding: 2rem;
}

/* Responsive design */
@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
    grid-template-rows: 70px 1fr;
    grid-template-areas:
      "topbar"
      "main";
  }

  .sidebar {
    display: none; /* In step 6 we'll make this a drawer */
  }

  .main-content {
    padding: 1rem;
  }

  .topbar {
    padding: 0 1rem;
  }

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