/* Core Layout and Structural CSS - AuraFinance */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* App Container */
.app-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  width: 100vw;
  min-height: 100vh;
  position: relative;
  transition: grid-template-columns var(--transition-normal);
}

/* Sidebar Navigation */
.sidebar {
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-glass);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  padding: 24px 16px;
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 24px 12px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-glow-primary);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
  overflow-y: auto;
  padding-right: 4px;
}

/* Custom Scrollbar for Sidebar */
.nav-menu::-webkit-scrollbar {
  width: 4px;
}
.nav-menu::-webkit-scrollbar-thumb {
  background: var(--border-glass);
  border-radius: var(--radius-full);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.nav-item i,
.nav-item svg {
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

.nav-item:hover {
  background: var(--primary-glow);
  color: var(--primary);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--primary-glow), rgba(139, 92, 246, 0.05));
  color: var(--primary);
  border-color: rgba(139, 92, 246, 0.15);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.03);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Main Viewport */
.main-viewport {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

/* Global Header */
.app-header {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 90;
  height: 76px;
  transition: all var(--transition-normal);
}

.header-title-section {
  display: flex;
  flex-direction: column;
}

.header-subtitle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Content Frame & Tabs */
.content-frame {
  flex-grow: 1;
  padding: 32px;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

.tab-panel {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.tab-panel.active {
  display: block;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--border-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--border-subtle);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.theme-toggle-btn .sun-icon {
  display: none;
}

body.light-theme .theme-toggle-btn .moon-icon {
  display: none;
}

body.light-theme .theme-toggle-btn .sun-icon {
  display: block;
}

/* Mobile Toggle Hamburger */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Keyframe Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

/* RESPONSIVENESS */
@media (max-width: 1024px) {
  .app-container {
    grid-template-columns: 80px 1fr;
  }
  .brand-name, .nav-item span {
    display: none;
  }
  .brand {
    justify-content: center;
    padding: 8px 0 24px 0;
  }
  .nav-item {
    justify-content: center;
    padding: 12px;
  }
  .nav-item i {
    font-size: 1.3rem;
  }
}

@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: fixed;
    left: -260px;
    width: 260px;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .brand-name, .nav-item span {
    display: block;
  }
  
  .brand {
    justify-content: flex-start;
    padding: 8px 12px 24px 12px;
  }
  
  .nav-item {
    justify-content: flex-start;
  }
  
  .mobile-menu-btn {
    display: block;
    margin-right: 12px;
  }
  
  .app-header {
    padding: 16px 20px;
  }
  
  .content-frame {
    padding: 20px;
  }
}