/* ============================================
   MODERN ADMIN PANEL - LIVE WALLPAPER APP
   Version: 2.0
   Last Updated: October 17, 2025
   ============================================ */

/* Import Modern 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 {
  /* Color Palette - Light Theme */
  --color-primary: #4F46E5;
  --color-primary-dark: #4338CA;
  --color-primary-light: #818CF8;
  --color-secondary: #10B981;
  --color-accent: #F59E0B;
  --color-danger: #EF4444;
  --color-warning: #F59E0B;
  --color-success: #10B981;
  --color-info: #3B82F6;

  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-success: linear-gradient(135deg, #0cebeb 0%, #20e3b2 50%, #29ffc6 100%);
  --gradient-danger: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;

  /* Background Colors */
  --bg-body: #F9FAFB;
  --bg-sidebar: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-header: #FFFFFF;

  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;

  /* Border & Shadow */
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
}

/* Dark Theme Colors */
html.dark-theme {
  --color-primary: #818CF8;
  --color-primary-dark: #6366F1;
  --color-primary-light: #A5B4FC;

  --bg-body: #0F172A;
  --bg-sidebar: #1E293B;
  --bg-card: #1E293B;
  --bg-header: #1E293B;

  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;

  --border-color: #334155;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* ============================================
   LOGIN PAGE STYLES
   ============================================ */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  width: 100%;
  background: var(--gradient-primary);
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

/* Animated background shapes */
.login-page::before,
.login-page::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  animation: float 20s ease-in-out infinite;
}

.login-page::before {
  width: 600px;
  height: 600px;
  background: var(--color-white);
  top: -300px;
  right: -200px;
}

.login-page::after {
  width: 400px;
  height: 400px;
  background: var(--color-white);
  bottom: -200px;
  left: -100px;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-50px) rotate(180deg); }
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 450px;
  z-index: 1;
}

.login-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-card h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.login-card p {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-700);
  font-weight: 600;
  font-size: 0.875rem;
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all var(--transition-base);
  background: var(--color-white);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group input::placeholder {
  color: var(--color-gray-400);
}

.error-message {
  background: #FEE2E2;
  color: #991B1B;
  border-left: 4px solid var(--color-danger);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  display: none;
}

.error-message.show {
  display: block;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* Dark theme login */
html.dark-theme .login-card {
  background: rgba(30, 41, 59, 0.95);
}

html.dark-theme .login-card h1 {
  color: var(--color-gray-100);
}

html.dark-theme .login-card p {
  color: var(--color-gray-400);
}

html.dark-theme .form-group label {
  color: var(--color-gray-300);
}

html.dark-theme .form-group input {
  background: var(--color-gray-700);
  border-color: var(--color-gray-600);
  color: var(--color-gray-100);
}

html.dark-theme .form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.1);
}

/* ============================================
   MAIN LAYOUT
   ============================================ */
.main-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  transition: all var(--transition-base);
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.clock-widget {
  text-align: center;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

.clock-time {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.05em;
}

.clock-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.sync-info {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  padding: var(--spacing-sm);
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
}

.sync-info i {
  color: var(--color-success);
  margin-right: var(--spacing-xs);
}

html.dark-theme .clock-widget {
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(165, 180, 252, 0.15) 100%);
}

html.dark-theme .sync-info {
  background: var(--color-gray-800);
}

.sidebar-header {
  padding: var(--spacing-xl) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.sidebar-header h2::before {
  content: '🎨';
  font-size: 1.75rem;
  -webkit-text-fill-color: initial;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg) 0;
  overflow-y: auto;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: var(--spacing-xs);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0.875rem var(--spacing-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  position: relative;
  border-radius: var(--radius-lg);
  margin: 0 var(--spacing-md);
}

.sidebar-nav a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transform: scaleY(0);
  transition: transform var(--transition-base);
}

.sidebar-nav a:hover {
  background: var(--color-gray-100);
  color: var(--text-primary);
  transform: translateX(3px);
}

.sidebar-nav a.active {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-nav a.active::before {
  transform: scaleY(1);
}

.sidebar-nav i {
  width: 20px;
  text-align: center;
  font-size: 1.125rem;
}

/* Dark theme sidebar */
html.dark-theme .sidebar {
  background: var(--bg-sidebar);
  box-shadow: var(--shadow-lg);
}

html.dark-theme .sidebar-nav a:hover {
  background: var(--color-gray-700);
}

html.dark-theme .sidebar-nav a.active {
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(165, 180, 252, 0.15) 100%);
  color: var(--color-primary-light);
}

/* ============================================
   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-base);
}

.main-header {
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.main-header h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.content {
  flex: 1;
  padding: var(--spacing-xl);
}

/* ============================================
   BUTTONS
   ============================================ */
button, .btn {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: inherit;
}

button:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

button:active, .btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
}

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

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

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

.btn-secondary {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.btn-small {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

html.dark-theme .btn-secondary {
  background: var(--color-gray-700);
  color: var(--color-gray-200);
}

#theme-toggle {
  background: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-toggle:hover {
  background: var(--color-gray-100);
  transform: rotate(180deg);
}

html.dark-theme #theme-toggle:hover {
  background: var(--color-gray-700);
}

/* ============================================
   STAT CARDS
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.stat-card p {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.stat-card .icon {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: 2.5rem;
  opacity: 0.1;
}

/* ============================================
   TABLES
   ============================================ */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

th, td {
  padding: 1rem var(--spacing-lg);
  text-align: left;
}

thead {
  background: var(--color-gray-50);
  border-bottom: 2px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

tbody tr:hover {
  background: var(--color-gray-50);
}

tbody tr:last-child {
  border-bottom: none;
}

html.dark-theme thead {
  background: var(--color-gray-800);
}

html.dark-theme tbody tr:hover {
  background: var(--color-gray-800);
}

/* ============================================
   SEARCH INPUT
   ============================================ */
.search-container {
  position: relative;
  max-width: 400px;
}

.search-container input {
  width: 100%;
  padding: 0.625rem 2.5rem 0.625rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  background: var(--bg-card);
  color: var(--text-primary);
}

.search-container input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-container::before {
  content: '🔍';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  pointer-events: none;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-footer {
  padding: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

.close-btn {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-gray-100);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.close-btn:hover {
  background: var(--color-gray-200);
  transform: rotate(90deg);
}

html.dark-theme .close-btn {
  background: var(--color-gray-700);
}

html.dark-theme .close-btn:hover {
  background: var(--color-gray-600);
}

.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.input-group input,
.input-group select,
.input-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
  background: var(--bg-card);
  color: var(--text-primary);
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-group textarea {
  min-height: 100px;
  resize: vertical;
}

/* ============================================
   STATUS BADGES
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
  letter-spacing: 0.025em;
  white-space: nowrap;
  line-height: 1;
}

.badge i {
  font-size: 0.875rem;
}

.badge-success {
  background: #D1FAE5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

.badge-danger {
  background: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.badge-warning {
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FDE68A;
}

.badge-info {
  background: #DBEAFE;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
}

html.dark-theme .badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #6EE7B7;
  border-color: rgba(16, 185, 129, 0.3);
}

html.dark-theme .badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #FCA5A5;
  border-color: rgba(239, 68, 68, 0.3);
}

html.dark-theme .badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #FCD34D;
  border-color: rgba(245, 158, 11, 0.3);
}

html.dark-theme .badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: #93C5FD;
  border-color: rgba(59, 130, 246, 0.3);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-xl);
  min-width: 300px;
  z-index: 2000;
  animation: toastSlideIn 0.3s ease-out;
  display: none;
}

.toast.show {
  display: block;
}

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

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-danger);
}

/* ============================================
   LOADING STATES
   ============================================ */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  border-top-color: var(--color-white);
  animation: spin 0.8s linear infinite;
}

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

/* ============================================
   MOBILE HAMBURGER MENU
   ============================================ */
.mobile-menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  font-size: 1.25rem;
}

.mobile-menu-toggle:hover {
  background: var(--color-gray-100);
  border-color: var(--color-primary);
}

html.dark-theme .mobile-menu-toggle:hover {
  background: var(--color-gray-700);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablets and below (1024px) */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 280px;
  }

  /* Hide sidebar by default on mobile */
  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }

  .sidebar.active {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  .main-content {
    margin-left: 0;
    width: 100%;
  }

  /* Show mobile menu toggle */
  .mobile-menu-toggle {
    display: flex;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .media-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

/* Tablets and small screens (768px) */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  /* Header adjustments */
  .main-header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .main-header h1 {
    font-size: 1.5rem;
  }

  .header-actions {
    gap: var(--spacing-sm);
    flex-wrap: wrap;
  }

  /* Make search container full width on tablet */
  .header-actions .search-container {
    order: 10;
    flex: 1 1 100%;
  }

  /* Content padding */
  .content {
    padding: var(--spacing-lg);
  }

  /* Stats grid */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .stat-card p {
    font-size: 2rem;
  }

  /* Search container */
  .search-container {
    max-width: 100%;
  }

  .search-box input {
    min-width: 200px;
  }

  /* Table responsive */
  .table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    /* Add scroll indicator shadow */
    background:
      linear-gradient(to right, var(--bg-card) 30%, rgba(255,255,255,0)),
      linear-gradient(to right, rgba(255,255,255,0), var(--bg-card) 70%) 0 100%,
      radial-gradient(farthest-side at 0% 50%, rgba(0,0,0,.2), rgba(0,0,0,0)),
      radial-gradient(farthest-side at 100% 50%, rgba(0,0,0,.2), rgba(0,0,0,0)) 0 100%;
    background-repeat: no-repeat;
    background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
    background-position: 0 0, 100%, 0 0, 100%;
    background-attachment: local, local, scroll, scroll;
  }

  table {
    min-width: 600px;
    font-size: 0.875rem;
  }

  th, td {
    padding: 0.75rem var(--spacing-md);
  }

  /* Table header */
  .table-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  .table-header h2 {
    font-size: 1.125rem;
  }

  /* Buttons */
  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .btn-small {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
  }

  /* Modals */
  .modal-content {
    max-width: 90%;
    margin: var(--spacing-md);
  }

  .modal-header h2 {
    font-size: 1.25rem;
  }

  /* Media grid */
  .media-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .media-thumbnail {
    height: 160px;
  }

  /* Upload area */
  .upload-area {
    padding: var(--spacing-xl);
  }

  .upload-icon {
    font-size: 2.5rem;
  }

  .upload-text {
    font-size: 1rem;
  }
}

/* Mobile devices (480px) */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  /* Login page */
  .login-card {
    padding: var(--spacing-xl);
  }

  .login-card h1 {
    font-size: 1.5rem;
  }

  /* Header */
  .main-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .main-header h1 {
    font-size: 1.25rem;
  }

  .header-actions {
    flex-wrap: wrap;
    width: 100%;
    justify-content: flex-start;
  }

  .mobile-menu-toggle {
    order: -1;
  }

  /* Hide button text on small screens, show icons only */
  .header-actions .btn span,
  .header-actions button span {
    display: none;
  }

  /* Keep icons visible */
  .header-actions .btn i,
  .header-actions button i {
    margin: 0;
  }

  /* Ensure buttons are still tappable (44px min) */
  .header-actions .btn,
  .header-actions button {
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    padding: 0.5rem;
  }

  /* Make search and select full width */
  .header-actions .search-container,
  .header-actions select {
    flex: 1 1 100%;
    order: 20;
    margin-top: var(--spacing-sm);
  }

  .header-actions .search-container input {
    width: 100%;
  }

  /* Ensure select dropdowns are full width */
  #time-range-select {
    width: 100% !important;
    min-width: 100% !important;
  }

  /* Content */
  .content {
    padding: var(--spacing-md);
  }

  /* Stats grid - single column */
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-lg);
  }

  .stat-card p {
    font-size: 1.75rem;
  }

  .stat-card .icon {
    font-size: 2rem;
  }

  /* Buttons full width on mobile */
  .btn-group-mobile {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .btn-group-mobile .btn {
    width: 100%;
    justify-content: center;
  }

  /* Table - card view */
  .table-responsive-cards {
    display: block;
  }

  .table-responsive-cards table {
    display: none;
  }

  /* Modal adjustments */
  .modal {
    padding: var(--spacing-sm);
  }

  .modal-content {
    max-width: 100%;
    margin: 0;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--spacing-md);
  }

  .modal-footer {
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }

  /* Input groups */
  .input-group input,
  .input-group select,
  .input-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
  }

  /* Media grid - 2 columns */
  .media-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .media-card {
    border-radius: var(--radius-md);
  }

  .media-thumbnail {
    height: 140px;
  }

  .media-info {
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .media-title {
    font-size: 0.875rem;
  }

  .media-actions {
    flex-direction: column;
  }

  .media-actions .btn {
    width: 100%;
    padding: 0.5rem;
    font-size: 0.75rem;
  }

  /* Badge adjustments */
  .badge {
    font-size: 0.65rem;
    padding: 0.25rem 0.5rem;
  }

  /* Toast notifications */
  .toast {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    bottom: var(--spacing-sm);
    min-width: auto;
  }

  /* Search box */
  .search-box input {
    min-width: 100%;
    font-size: 16px; /* Prevents zoom on iOS */
  }

  /* Filter select */
  .filter-select {
    width: 100%;
    font-size: 16px; /* Prevents zoom on iOS */
  }

  /* Upload area */
  .upload-area {
    padding: var(--spacing-lg);
  }

  .upload-icon {
    font-size: 2rem;
  }

  .upload-text {
    font-size: 0.9rem;
  }

  .upload-subtext {
    font-size: 0.75rem;
  }

  /* Sidebar adjustments */
  .sidebar {
    width: 85%;
    max-width: 300px;
  }

  .sidebar-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .sidebar-header h2 {
    font-size: 1.25rem;
  }

  .sidebar-nav a {
    padding: 0.75rem var(--spacing-md);
    font-size: 0.875rem;
  }

  .sidebar-footer {
    padding: var(--spacing-md);
  }

  .clock-time {
    font-size: 1.25rem;
  }

  .clock-date {
    font-size: 0.75rem;
  }
}

/* Extra small devices (360px) */
@media (max-width: 360px) {
  .media-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    gap: var(--spacing-sm);
  }

  .btn {
    font-size: 0.8125rem;
  }
}

/* Landscape mode adjustments */
@media (max-height: 600px) and (orientation: landscape) {
  .sidebar {
    max-height: 100vh;
    overflow-y: auto;
  }

  .sidebar-nav {
    max-height: calc(100vh - 200px);
  }

  .main-header {
    position: relative;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.font-bold { font-weight: 700; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-md); }
.gap-2 { gap: var(--spacing-lg); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   MEDIA MANAGEMENT PAGE STYLES
   ============================================ */

/* Upload Section */
.upload-section {
  margin-bottom: var(--spacing-xl);
}

.upload-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow);
}

.upload-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
}

.upload-area {
  border: 3px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  margin-top: var(--spacing-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  background: transparent;
}

.upload-area:hover {
  border-color: var(--color-primary);
  background: rgba(79, 70, 229, 0.03);
}

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

.upload-text {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
}

.upload-subtext {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: var(--spacing-sm) 0 var(--spacing-lg) 0;
}

.upload-info {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: var(--spacing-lg);
}

.upload-progress-container {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

html.dark-theme .upload-progress-container {
  background: var(--color-gray-800);
}

.upload-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  color: var(--text-primary);
}

.progress-bar-wrapper {
  width: 100%;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

html.dark-theme .progress-bar-wrapper {
  background: var(--color-gray-700);
}

.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* Media Grid */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
}

.media-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.media-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.media-thumbnail {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--color-gray-100);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

html.dark-theme .media-thumbnail {
  background: var(--color-gray-800);
}

.media-thumbnail img,
.media-thumbnail video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.9);
  pointer-events: none;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.file-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
}

html.dark-theme .file-placeholder {
  background: var(--color-gray-800);
}

.media-info {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  flex: 1;
}

.media-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.media-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.media-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: auto;
}

.media-actions .btn {
  flex: 1;
  justify-content: center;
}

/* Search and Filter */
.table-header {
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.table-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
}

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

.search-box i {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  padding: 0.625rem 1rem 0.625rem 2.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  background: var(--bg-card);
  color: var(--text-primary);
  min-width: 250px;
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.filter-select {
  padding: 0.625rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Modal Overlay */
.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: -1;
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-gray-100);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  font-size: 1.25rem;
}

.modal-close:hover {
  background: var(--color-gray-200);
  transform: rotate(90deg);
}

html.dark-theme .modal-close {
  background: var(--color-gray-700);
}

html.dark-theme .modal-close:hover {
  background: var(--color-gray-600);
}

.modal-actions {
  padding: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

.modal-large {
  max-width: 800px;
}

/* Media Details */
.media-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.detail-row {
  display: flex;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 140px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.detail-row > span:last-child,
.detail-row > a {
  color: var(--text-primary);
  flex: 1;
}

/* Radio Button Styles */
.radio-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.radio-label:hover {
  border-color: var(--color-primary);
  background: rgba(79, 70, 229, 0.05);
}

.radio-label input[type="radio"] {
  width: auto;
  margin: 0;
}

.radio-label input[type="radio"]:checked + span {
  color: var(--color-primary);
  font-weight: 600;
}

/* Empty and Loading States */
.empty-state,
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  color: var(--text-muted);
  text-align: center;
  grid-column: 1 / -1;
}

.empty-state i,
.loading-state i {
  margin-bottom: var(--spacing-md);
}

.empty-state p,
.loading-state p {
  margin: 0;
  font-size: 1.125rem;
}

/* Badge Secondary */
.badge-secondary {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

html.dark-theme .badge-secondary {
  background: var(--color-gray-700);
  color: var(--color-gray-300);
  border-color: var(--color-gray-600);
}

/* Responsive Media Grid */
@media (max-width: 768px) {
  .media-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
  }

  .table-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .search-box input {
    min-width: 100%;
  }
}