/* =====================================================
   DocManager Modern Styles 2025
   Complete UI component styles with glassmorphism
   ===================================================== */

/* =====================================================
   Layout Components
   ===================================================== */

/* Dashboard Layout */
.dashboard {
  display: flex;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
}

.dashboard::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* =====================================================
   Sidebar Styles
   ===================================================== */

.sidebar {
  width: var(--sidebar-width);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-right: 1px solid var(--border-primary);
  padding: var(--space-6);
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: all var(--transition-normal);
  z-index: 100;
  box-shadow: var(--shadow-xl);
}

.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-2);
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-secondary);
  padding-bottom: var(--space-6);
}

.sidebar-header i {
  font-size: var(--text-2xl);
  color: var(--accent-blue);
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-header h2 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  font-weight: var(--font-medium);
  position: relative;
  overflow: hidden;
}

.menu-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.menu-item i {
  font-size: var(--text-lg);
  width: 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.menu-item span {
  position: relative;
  z-index: 1;
}

.menu-item:hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
  transform: translateX(4px);
}

.menu-item:hover::before {
  opacity: 0.1;
}

.menu-item.active {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
  border: 1px solid var(--border-accent);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.menu-item.active::before {
  opacity: 0.15;
}

/* =====================================================
   Main Content Area
   ===================================================== */

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

.sidebar.collapsed + .main-content {
  margin-left: var(--sidebar-width-collapsed);
}

/* =====================================================
   Topbar Styles
   ===================================================== */

.topbar {
  height: var(--topbar-height);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-6);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-md);
}

.toggle-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--border-primary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.toggle-sidebar:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
  transform: scale(1.05);
}

.search-container {
  flex: 1;
  max-width: 400px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box i {
  position: absolute;
  left: var(--space-4);
  color: var(--text-tertiary);
  z-index: 1;
}

.search-box input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-12);
  background: var(--glass-bg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  color: var(--text-primary);
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
}

.search-box input:focus {
  outline: none;
  border-color: var(--border-accent);
  background: var(--glass-bg-hover);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-box input::placeholder {
  color: var(--text-tertiary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.user-info:hover {
  background: var(--glass-bg-hover);
  transform: translateY(-1px);
}

.user-info img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.user-info span {
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.user-info i {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

/* =====================================================
   Content Area Styles
   ===================================================== */

.content-area {
  flex: 1;
  padding: var(--space-8);
  background: transparent;
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-8);
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.025em;
}

/* =====================================================
   Card Components
   ===================================================== */

.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2xl);
}

.card-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-secondary);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

/* =====================================================
   Statistics Cards
   ===================================================== */

.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  border-radius: 50%;
  transform: translate(50%, -50%);
  opacity: 0.05;
}

.stat-card:hover {
  background: var(--glass-bg-hover);
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  position: relative;
  z-index: 1;
}

.stat-icon.blue {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-light) 100%);
  color: white;
}

.stat-icon.green {
  background: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-emerald-light) 100%);
  color: white;
}

.stat-icon.purple {
  background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-purple-light) 100%);
  color: white;
}

.stat-icon.orange {
  background: linear-gradient(135deg, var(--accent-amber) 0%, var(--accent-amber-light) 100%);
  color: white;
}

.stat-info {
  flex: 1;
  position: relative;
  z-index: 1;
}

.stat-info h3 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin: 0 0 var(--space-1) 0;
}

.stat-info p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
  font-weight: var(--font-medium);
}

/* =====================================================
   Upload Area Styles
   ===================================================== */

.upload-area {
  border: 2px dashed var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-16);
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--border-accent);
  background: var(--glass-bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.2);
}

.upload-icon {
  font-size: var(--text-5xl);
  color: var(--accent-blue);
  margin-bottom: var(--space-4);
  animation: bounce 2s infinite;
}

.upload-text {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.upload-subtext {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.upload-btn {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  color: white;
  border: none;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-lg);
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--accent-blue-light) 0%, var(--accent-purple-light) 100%);
}

.upload-btn:active {
  transform: translateY(0);
}

/* =====================================================
   Form Styles
   ===================================================== */

.form-group {
  margin-bottom: var(--space-6);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-accent);
  background: var(--glass-bg-hover);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
  color: var(--text-tertiary);
}

.form-group small {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

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

.form-check-input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-blue);
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* =====================================================
   Tab Styles
   ===================================================== */

.tabs {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  background: var(--glass-bg);
  padding: var(--space-1);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-primary);
  overflow-x: auto;
}

.tab {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  white-space: nowrap;
  position: relative;
}

.tab:hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
}

.tab.active {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

/* =====================================================
   Document List Styles
   ===================================================== */

.document-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.document-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.document-item:hover {
  background: var(--glass-bg);
  border-color: var(--border-primary);
  transform: translateX(4px);
}

.document-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--error) 0%, var(--error-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.document-info {
  flex: 1;
}

.document-name {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.document-meta {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.document-actions {
  display: flex;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.document-item:hover .document-actions {
  opacity: 1;
}

.action-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
  background: var(--glass-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
}

.action-btn:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
  transform: scale(1.1);
}

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

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .stats-container {
    grid-template-columns: 1fr;
  }
  
  .content-area {
    padding: var(--space-4);
  }
  
  .card {
    padding: var(--space-4);
  }
  
  .tabs {
    overflow-x: auto;
  }
  
  .topbar {
    padding: 0 var(--space-4);
  }
  
  .search-container {
    display: none;
  }
}

@media (max-width: 640px) {
  .page-title {
    font-size: var(--text-2xl);
  }
  
  .upload-area {
    padding: var(--space-8);
    min-height: 150px;
  }
  
  .stat-card {
    padding: var(--space-4);
  }
  
  .stat-icon {
    width: 48px;
    height: 48px;
    font-size: var(--text-xl);
  }
}