/* ===================================
   KEYBEE Knowledge Base
   Main Stylesheet - Beautiful Modern Design
   =================================== */

/* Import Design System */
@import url('design-system.css');
@import url('theme-variables.css');

/* Import Components */
@import url('components/header.css');
@import url('components/sidebar.css');
@import url('components/cards.css');
@import url('components/login.css');
@import url('components/branding.css');

/* ===================================
   CUSTOM STYLES
   =================================== */

/* App Layout */
#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.app-layout {
  display: flex;
  flex: 1;
  padding-top: 72px;
}

.app-content {
  flex: 1;
  display: flex;
  min-height: calc(100vh - 72px);
}

.main-content {
  flex: 1;
  margin-left: 280px;
  padding: var(--space-8);
  background: var(--bg-primary);
  transition: margin-left var(--transition-base);
}

.app-sidebar.collapsed ~ .main-content {
  margin-left: 72px;
}

/* Content Container */
.content-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Page Headers */
.page-header {
  margin-bottom: var(--space-10);
  animation: fadeIn var(--transition-base) ease-out;
}

.page-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
  letter-spacing: -0.03em;
}

.page-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-6);
  animation: scaleIn var(--transition-base) ease-out;
}

/* Content Sections */
.content-section {
  margin-bottom: var(--space-12);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.section-action {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

/* Tag Cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
}

.tag:hover {
  background: var(--color-primary-100);
  transform: scale(1.05);
}

.tag-count {
  margin-left: var(--space-1);
  font-size: var(--font-size-xs);
  opacity: 0.7;
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  animation: fadeIn var(--transition-base) ease-out;
}

.empty-state-illustration {
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
}

.empty-state-illustration::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150%;
  height: 150%;
  background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
}

.empty-state-icon {
  font-size: var(--font-size-5xl);
  color: white;
  z-index: 1;
}

.empty-state-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.empty-state-text {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* Loading States */
.loading-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-primary);
  border-top-color: var(--color-primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Skeleton Loading */
.skeleton-container {
  animation: fadeIn var(--transition-base) ease-out;
}

.skeleton-card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-primary);
}

.skeleton-line {
  height: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  position: relative;
  overflow: hidden;
}

.skeleton-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.5) 50%, transparent 100%);
  animation: shimmer 1.5s infinite;
}

.skeleton-line.title {
  height: 24px;
  width: 70%;
}

.skeleton-line.short {
  width: 40%;
}

/* Toasts */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-notification);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  min-width: 300px;
  padding: var(--space-4);
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: slideInRight var(--transition-base) ease-out;
  position: relative;
  overflow: hidden;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
}

.toast.success::before {
  background: var(--color-success);
}

.toast.error::before {
  background: var(--color-error);
}

.toast-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
}

.toast.success .toast-icon {
  background: var(--color-success);
  color: white;
}

.toast.error .toast-icon {
  background: var(--color-error);
  color: white;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-1);
}

.toast-message {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.toast-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-neutral-400);
  cursor: pointer;
  transition: all var(--transition-base);
}

.toast-close:hover {
  color: var(--color-neutral-600);
}

/* Responsive */
@media (max-width: 1024px) {
  .main-content {
    margin-left: 0;
  }
  
  .article-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .app-layout {
    padding-top: 64px;
  }
  
  .main-content {
    padding: var(--space-4);
  }
  
  .page-title {
    font-size: var(--font-size-3xl);
  }
  
  .page-subtitle {
    font-size: var(--font-size-base);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
  }
  
  .toast {
    min-width: auto;
    width: 100%;
  }
}

/* Print Styles */
@media print {
  .app-header,
  .app-sidebar,
  .toast-container {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
    padding: 0;
  }
  
  .page-title {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}