/* ==========================================================================
   EquiFlow - Layout Styles
   Sidebar, Navigation, Top Bar, Responsive Containers, Modals
   ========================================================================== */

#app-container {
  display: flex;
  min-height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Sidebar */
.app-sidebar {
  width: 260px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  height: 100vh;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: transform var(--transition-normal), width var(--transition-normal);
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--brand-primary), #0284c7, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: var(--text-lg);
  box-shadow: 0 4px 10px var(--brand-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-tagline {
  font-size: var(--text-2xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow-y: auto;
}

.nav-section-title {
  font-size: var(--text-2xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.75rem 0.75rem 0.25rem 0.75rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

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

.nav-item.active {
  background-color: var(--brand-glow);
  color: var(--brand-primary);
  font-weight: 600;
  border-color: rgba(14, 165, 233, 0.25);
}

.nav-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-surface-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}

/* Main Content Area */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* Top Navigation Bar */
.app-topbar {
  height: 64px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  gap: 1.5rem;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  max-width: 680px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.375rem;
  border-radius: var(--radius-sm);
}

.global-search-container {
  position: relative;
  width: 100%;
}

.global-search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  color: var(--text-muted);
  pointer-events: none;
}

.global-search-input {
  width: 100%;
  height: 40px;
  padding: 0 4rem 0 2.5rem;
  background-color: var(--bg-surface-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.global-search-input:focus {
  background-color: var(--bg-surface);
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--brand-glow);
}

.search-shortcut-hint {
  position: absolute;
  right: 0.75rem;
  padding: 0.15rem 0.4rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xs);
  font-size: var(--text-2xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Page Content Viewport */
.content-viewport {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.5rem;
}

.view-container {
  max-width: 1440px;
  margin: 0 auto;
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile Responsive Drawer */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-drawer) - 1);
}

@media (max-width: 1024px) {
  .app-sidebar {
    position: fixed;
    left: -260px;
    box-shadow: var(--shadow-xl);
    z-index: var(--z-drawer);
  }

  .app-sidebar.drawer-open {
    transform: translateX(260px);
  }

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

  .mobile-menu-btn {
    display: flex;
  }

  .content-viewport {
    padding: 1rem;
  }
}