/* ============================================
 * Design System — Tool Đăng Đa Tài Khoản
 * Dark Mode, Glassmorphism, Premium Aesthetics
 * ============================================ */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
 * CSS Custom Properties (Design Tokens)
 * ============================================ */
:root {
  /* Colors — Deep space dark theme */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);
  --bg-input: rgba(255, 255, 255, 0.06);
  --bg-input-focus: rgba(255, 255, 255, 0.1);
  
  /* Accent gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-success: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-info: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-youtube: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
  --gradient-facebook: linear-gradient(135deg, #1877f2 0%, #0d5bbd 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, hsla(240, 100%, 74%, 0.08) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, hsla(270, 100%, 60%, 0.06) 0px, transparent 50%),
                   radial-gradient(at 0% 50%, hsla(210, 100%, 50%, 0.05) 0px, transparent 50%);
  
  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #818cf8;
  
  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --border-focus: rgba(129, 140, 248, 0.5);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(129, 140, 248, 0.15);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Radius */
  --radius-sm: 0px;
  --radius-md: 2px;
  --radius-lg: 2px;
  --radius-xl: 4px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Mesh gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: #a5b4fc;
}

/* ============================================
 * Scrollbar
 * ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ============================================
 * Layout
 * ============================================ */
.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  background: rgba(10, 14, 26, 0.95);
  border-right: 1px solid var(--border-subtle);
  backdrop-filter: blur(20px);
  z-index: 100;
  transition: width var(--transition-base);
}

.sidebar-header {
  padding: var(--space-lg) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
}
.sidebar-brand h1 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}
.sidebar-brand span {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  overflow-y: auto;
}

.nav-section-label {
  padding: var(--space-md) var(--space-md) var(--space-xs);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.65rem var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  margin-bottom: 2px;
  user-select: none;
}
.nav-item:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: rgba(129, 140, 248, 0.12);
  color: var(--text-accent);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  border-radius: 0 3px 3px 0;
  background: var(--gradient-primary);
}

.nav-item .icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.nav-item .badge {
  margin-left: auto;
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* ---- Main Content ---- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-xl) var(--space-2xl);
  min-height: 100vh;
}

/* ---- Top Bar ---- */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

.top-bar-actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

/* ============================================
 * Cards & Glass Panels
 * ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  transition: all var(--transition-base);
  overflow: hidden;
}
.card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: var(--space-xl);
}

.card-footer {
  padding: var(--space-md) var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-md);
}

/* ============================================
 * Stat Cards (Dashboard)
 * ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all var(--transition-base);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-light);
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}
.stat-card.purple::before { background: var(--gradient-primary); }
.stat-card.green::before { background: var(--gradient-success); }
.stat-card.red::before { background: var(--gradient-danger); }
.stat-card.blue::before { background: var(--gradient-info); }
.stat-card.orange::before { background: var(--gradient-warning); }

.stat-card .stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: var(--space-md);
}
.stat-card.purple .stat-icon { background: rgba(129, 140, 248, 0.12); color: #818cf8; }
.stat-card.green .stat-icon { background: rgba(34, 197, 94, 0.12); color: #22c55e; }
.stat-card.red .stat-icon { background: rgba(239, 68, 68, 0.12); color: #ef4444; }
.stat-card.blue .stat-icon { background: rgba(59, 130, 246, 0.12); color: #3b82f6; }
.stat-card.orange .stat-icon { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================
 * Buttons
 * ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
}
.btn-success:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.3);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--gradient-danger);
  color: white;
}
.btn-danger:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-warning {
  background: var(--gradient-warning);
  color: white;
}

.btn-ghost {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-youtube {
  background: var(--gradient-youtube);
  color: white;
}
.btn-facebook {
  background: var(--gradient-facebook);
  color: white;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.78rem;
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* ============================================
 * Form Elements
 * ============================================ */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background: var(--bg-input-focus);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* ============================================
 * Tables
 * ============================================ */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}
.data-table tbody tr:hover {
  background: var(--bg-glass-hover);
}
.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
 * Status Badges
 * ============================================ */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-pending { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }
.status-pending::before { background: #f59e0b; }

.status-ai_generating { background: rgba(168, 85, 247, 0.12); color: #a855f7; }
.status-ai_generating::before { background: #a855f7; }

.status-ready_to_publish { background: rgba(59, 130, 246, 0.12); color: #3b82f6; }
.status-ready_to_publish::before { background: #3b82f6; }

.status-processing { background: rgba(129, 140, 248, 0.12); color: #818cf8; }
.status-processing::before { background: #818cf8; animation: pulse-dot 1.5s infinite; }

.status-published { background: rgba(34, 197, 94, 0.12); color: #22c55e; }
.status-published::before { background: #22c55e; }

.status-failed { background: rgba(239, 68, 68, 0.12); color: #ef4444; }
.status-failed::before { background: #ef4444; }

.status-active { background: rgba(34, 197, 94, 0.12); color: #22c55e; }
.status-active::before { background: #22c55e; }

.status-inactive { background: rgba(100, 116, 139, 0.12); color: #94a3b8; }
.status-inactive::before { background: #94a3b8; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ============================================
 * Platform Tags
 * ============================================ */
.platform-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
}
.platform-tag.youtube {
  background: rgba(255, 0, 0, 0.1);
  color: #ff4444;
}
.platform-tag.facebook {
  background: rgba(24, 119, 242, 0.1);
  color: #4599ff;
}
.platform-tag.youtube_shorts {
  background: rgba(255, 0, 0, 0.1);
  color: #ff4444;
}
.platform-tag.facebook_story {
  background: rgba(24, 119, 242, 0.1);
  color: #4599ff;
}

/* ============================================
 * Tab Content Pages
 * ============================================ */
.tab-page {
  view-transition-name: page;
  display: none;
  animation: fadeIn 0.3s ease;
}
.tab-page.active {
  display: block;
}

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

/* ============================================
 * Modal
 * ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 560px;
  max-height: 85vh;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-base);
}
.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}
.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.modal-close:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-xl);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-md) var(--space-xl) var(--space-lg);
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  flex-shrink: 0;
}

/* ============================================
 * Toast Notifications
 * ============================================ */
.toast-container {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  min-width: 300px;
  max-width: 420px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  animation: slideInRight 0.3s ease;
  position: relative;
  overflow: hidden;
}
.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
}
.toast.success::before { background: var(--gradient-success); }
.toast.error::before { background: var(--gradient-danger); }
.toast.info::before { background: var(--gradient-info); }
.toast.warning::before { background: var(--gradient-warning); }

.toast-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}
.toast.success .toast-icon { color: #22c55e; }
.toast.error .toast-icon { color: #ef4444; }
.toast.info .toast-icon { color: #3b82f6; }
.toast.warning .toast-icon { color: #f59e0b; }

.toast-message {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 1rem;
}

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

/* ============================================
 * Charts Container
 * ============================================ */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.chart-container {
  position: relative;
  height: 280px;
  padding: var(--space-md);
}

/* ============================================
 * File Upload Area
 * ============================================ */
.upload-zone {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--bg-glass);
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--border-focus);
  background: rgba(129, 140, 248, 0.05);
  box-shadow: var(--shadow-glow);
}

.upload-zone .upload-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.upload-zone h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.upload-zone p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================
 * File Grid
 * ============================================ */
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.file-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-fast);
}
.file-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.file-card .file-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.file-card .file-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
  margin-bottom: var(--space-xs);
}

.file-card .file-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.file-card .file-actions {
  margin-top: var(--space-sm);
  display: flex;
  gap: var(--space-xs);
}

/* ============================================
 * Account Cards
 * ============================================ */
.accounts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.account-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}
.account-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.account-card-header {
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
}

.account-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  object-fit: cover;
  background: var(--bg-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.account-info {
  flex: 1;
  min-width: 0;
}

.account-name {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.account-id-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
}

.account-card-body {
  padding: var(--space-lg);
}

.account-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  text-align: center;
}

.account-stat-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.account-stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.account-card-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

/* ============================================
 * Settings Page
 * ============================================ */
.settings-section {
  margin-bottom: var(--space-2xl);
}

.settings-section-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-primary);
}

.settings-group {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

/* ============================================
 * Loading & Empty States
 * ============================================ */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top-color: var(--text-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.empty-state p {
  font-size: 0.85rem;
  max-width: 400px;
  margin: 0 auto var(--space-lg);
}

/* ============================================
 * Log Entries
 * ============================================ */
.log-entry {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.82rem;
}
.log-entry:last-child {
  border-bottom: none;
}

.log-level {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}
.log-level.info { background: rgba(59, 130, 246, 0.12); color: #3b82f6; }
.log-level.warning { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }
.log-level.error { background: rgba(239, 68, 68, 0.12); color: #ef4444; }
.log-level.debug { background: rgba(100, 116, 139, 0.12); color: #94a3b8; }

.log-time {
  flex-shrink: 0;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: monospace;
  min-width: 140px;
}

.log-message {
  flex: 1;
  color: var(--text-secondary);
  word-break: break-word;
}

/* ============================================
 * Progress Bar
 * ============================================ */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-glass);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  transition: width var(--transition-slow);
}

/* ============================================
 * Toolbar / Filters
 * ============================================ */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.toolbar-search {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.toolbar-search .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.toolbar-search .form-input {
  padding-left: 36px;
}

/* ============================================
 * Responsive
 * ============================================ */
@media (max-width: 1024px) {
  .main-content {
    padding: var(--space-lg);
  }
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 200;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: var(--space-md);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .accounts-grid {
    grid-template-columns: 1fr;
  }
  .mobile-menu-btn {
    display: flex !important;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
}

/* ============================================
 * Utility Classes
 * ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--text-accent); }
.text-success { color: #22c55e; }
.text-danger { color: #ef4444; }
.text-warning { color: #f59e0b; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.hidden { display: none !important; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ============================================
 * SVG Icon System
 * ============================================ */
.icon-svg {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  flex-shrink: 0;
}

.nav-item .icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-item .icon .icon-svg {
  width: 18px;
  height: 18px;
}

.stat-card .stat-icon .icon-svg {
  width: 1.3em;
  height: 1.3em;
}

.btn .icon-svg {
  width: 16px;
  height: 16px;
}

.toast-icon .icon-svg {
  width: 20px;
  height: 20px;
}

/* ---- SVG Icon Animations ---- */
.icon-line-animate {
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
  animation: iconLineIn 0.5s ease forwards;
}

@keyframes iconLineIn {
  to { stroke-dashoffset: 0; }
}

.icon-check-animate {
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
  animation: iconCheckIn 0.4s ease 0.2s forwards;
}

@keyframes iconCheckIn {
  to { stroke-dashoffset: 0; }
}

.icon-pulse {
  animation: iconPulse 2.5s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* Spin on hover (settings gear) */
.icon-spin-hover {
  transition: transform 0.4s ease;
}
.nav-item:hover .icon-spin-hover,
.btn:hover .icon-spin-hover {
  transform: rotate(90deg);
}

/* Spin on click (refresh) */
.icon-spin-click.spinning {
  animation: iconSpin 0.8s linear infinite;
}

@keyframes iconSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ============================================
 * OAuth Connect Modal
 * ============================================ */
.oauth-connect-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.oauth-step {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  align-items: flex-start;
}

.oauth-step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
  margin-top: 2px;
}

.oauth-step-content {
  flex: 1;
  min-width: 0;
}

.oauth-step-content h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.oauth-step-content p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* URL Copy Box */
.url-copy-box {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.url-copy-box .url-display {
  flex: 1;
  min-width: 0;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.72rem;
  color: var(--text-accent);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: all;
  cursor: text;
}

.url-copy-box .btn-copy {
  padding: 0.5rem 0.8rem;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  font-size: 0.78rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: inherit;
}
.url-copy-box .btn-copy:hover {
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  transform: translateY(-1px);
}
.url-copy-box .btn-copy.copied {
  background: var(--gradient-success);
}

/* Code Input Box */
.code-input-box {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.code-input-box .form-input {
  flex: 1;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

/* OAuth Divider */
.oauth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.oauth-divider::before,
.oauth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* OAuth Platform Buttons */
.oauth-platform-btns {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.oauth-platform-btn {
  flex: 1;
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  font-family: inherit;
  color: var(--text-primary);
}

.oauth-platform-btn:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.oauth-platform-btn.selected {
  border-color: var(--text-accent);
  background: rgba(129, 140, 248, 0.06);
}

.oauth-platform-btn .platform-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-sm);
}
.oauth-platform-btn .platform-icon .icon-svg {
  width: 40px;
  height: 40px;
}

.oauth-platform-btn.youtube-btn:hover,
.oauth-platform-btn.youtube-btn.selected {
  border-color: #ff4444;
  background: rgba(255, 0, 0, 0.04);
}
.oauth-platform-btn.youtube-btn .platform-icon { color: #ff4444; }

.oauth-platform-btn.facebook-btn:hover,
.oauth-platform-btn.facebook-btn.selected {
  border-color: #4599ff;
  background: rgba(24, 119, 242, 0.04);
}
.oauth-platform-btn.facebook-btn .platform-icon { color: #4599ff; }

.oauth-platform-btn h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.oauth-platform-btn p {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ============================================
 * Connected Status Indicator
 * ============================================ */
.token-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.token-status.ok {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}
.token-status.expired {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}
.token-status.missing {
  background: rgba(100, 116, 139, 0.1);
  color: #94a3b8;
}

/* ============================================
 * View Transitions
 * ============================================ */
::view-transition-old(page) {
  animation: fade-out 0.15s ease-out both;
}
::view-transition-new(page) {
  animation: fade-in 0.2s ease-out both;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fade-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-10px); }
}