/* ================================
   BASE STYLES & RESET
   ================================ */

/* ===== CSS Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== Root & Body ===== */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  overflow-x: hidden;
  overflow-y: scroll !important; /* Force vertical scrolling */
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===== Lists ===== */
ul, ol {
  list-style: none;
}

/* ===== Images ===== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== Buttons ===== */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ===== Inputs ===== */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Focus Visible ===== */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===== Screen Reader Only ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== Hidden Utility ===== */
.hidden {
  display: none !important;
}

/* ===== Layout Container ===== */
.app-container {
  display: flex;
  margin-top: var(--topnav-height);
  background: var(--color-bg-secondary);
}

/* ===== Top Navigation ===== */
#top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topnav-height);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur-lg);
  border-bottom: 1px solid var(--glass-border);
  z-index: var(--z-fixed);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--spacing-xl);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.nav-left, .nav-center, .nav-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-center {
  flex: 1;
  max-width: 600px;
  margin: 0 var(--spacing-2xl);
}

/* ===== Logo ===== */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.logo i {
  width: 32px;
  height: 32px;
}

.logo-text {
  display: none;
}

/* ===== Search Container ===== */
.search-container {
  position: relative;
  width: 100%;
}

.search-container i {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.search-container input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-md) 48px;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  background: var(--color-bg-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.search-container input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== Icon Buttons ===== */
.icon-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.icon-button:hover {
  background: var(--color-gray-100);
  color: var(--color-text-primary);
}

.icon-button i {
  width: 20px;
  height: 20px;
}

.notification-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border-radius: var(--radius-full);
  background: var(--color-error);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== User Menu ===== */
.user-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background: transparent;
  transition: background var(--transition-fast);
}

.user-button:hover {
  background: var(--color-gray-100);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

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

.user-button i {
  width: 16px;
  height: 16px;
  color: var(--color-text-tertiary);
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: var(--topnav-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--topnav-height));
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur-lg);
  border-right: 1px solid var(--glass-border);
  overflow-y: auto;
  transition: transform var(--transition-normal);
  z-index: var(--z-sticky);
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--spacing-xl);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.nav-item:hover {
  background: var(--color-gray-100);
  color: var(--color-text-primary);
}

.nav-item.active {
  background: var(--color-primary);
  color: white;
}

.nav-item i {
  width: 20px;
  height: 20px;
}

.nav-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--spacing-lg) 0;
}

/* ===== Sidebar Footer ===== */
.sidebar-footer {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border-light);
}

.delegation-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: var(--color-gray-50);
}

.delegation-status i {
  width: 20px;
  height: 20px;
  color: var(--color-success);
}

.delegation-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.delegation-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

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

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--spacing-2xl);
  max-width: calc(var(--content-max-width) - var(--sidebar-width));
  width: 100%;
  min-height: 100vh;
  overflow-y: auto;
  padding-bottom: 100px; /* Extra space at bottom for scrolling */
}

/* ===== Views ===== */
.view {
  display: none;
}

.view-active {
  display: block;
  animation: fadeIn var(--transition-normal);
}

.view-hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view-header {
  margin-bottom: var(--spacing-2xl);
}

.view-header h1 {
  margin-bottom: var(--spacing-sm);
}

.view-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin: 0;
}

/* ===== Responsive Design ===== */

/* Tablet (640px - 1023px) */
@media (max-width: 1023px) {
  .nav-center {
    max-width: 400px;
  }
  
  .sidebar {
    width: 200px;
  }
  
  .main-content {
    margin-left: 200px;
    padding: var(--spacing-xl);
  }
  
  .logo-text {
    display: inline;
  }
}

/* Mobile (< 640px) */
@media (max-width: 639px) {
  :root {
    --topnav-height: 64px;
  }
  
  .nav-container {
    padding: 0 var(--spacing-lg);
  }
  
  .nav-center {
    display: none;
  }
  
  .logo-text {
    display: none;
  }
  
  .user-name {
    display: none;
  }
  
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    padding: var(--spacing-lg);
  }
  
  .icon-button {
    min-width: 44px;
    min-height: 44px;
  }
  
  .view-header h1 {
    font-size: var(--font-size-2xl);
  }
  
  .view-subtitle {
    font-size: var(--font-size-base);
  }
}

/* Desktop (> 1024px) */
@media (min-width: 1024px) {
  .logo-text {
    display: inline;
  }
  
  #menu-toggle {
    display: none;
  }
}

/* ===== AI Helper ===== */
.ai-helper {
  position: fixed;
  bottom: var(--spacing-2xl);
  right: var(--spacing-2xl);
  z-index: var(--z-popover);
}

.ai-helper-toggle {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.ai-helper-toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-2xl);
}

.ai-helper-toggle i {
  width: 24px;
  height: 24px;
}

.ai-helper-content {
  display: none;
  position: absolute;
  bottom: 72px;
  right: 0;
  width: 320px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-lg);
}

/* ===== Toast Container ===== */
#toast-container {
  position: fixed;
  top: calc(var(--topnav-height) + var(--spacing-xl));
  right: var(--spacing-xl);
  z-index: 99999; /* Must be above all modals */
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  pointer-events: none;
}

#toast-container > * {
  pointer-events: auto;
}