/* ============================================
   MODERN VPN ADMIN PANEL - THEME STYLES
   ============================================ */

:root {
  /* Modern Color Palette */
  --primary-color: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #6366F1;
  --secondary-color: #10B981;
  --accent-color: #F59E0B;
  --danger-color: #EF4444;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --info-color: #3B82F6;
  
  /* Neutral Colors */
  --bg-primary: #F9FAFB;
  --bg-secondary: #FFFFFF;
  --bg-dark: #1F2937;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --border-color: #E5E7EB;
  --hover-bg: #F3F4F6;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* 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);
}

/* ============================================
   BODY & GENERAL STYLES
   ============================================ */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary) !important;
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

/* ============================================
   MODERN HEADER
   ============================================ */
.main-header {
  background: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--border-color) !important;
  box-shadow: var(--shadow-sm) !important;
  height: 64px;
  transition: all var(--transition-base);
}

.main-header .logo {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
  font-weight: 600 !important;
  letter-spacing: 0.5px;
  height: 64px;
  line-height: 64px;
  transition: all var(--transition-base);
}

.main-header .logo:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%) !important;
  transform: translateY(-1px);
}

.main-header .navbar {
  background: transparent !important;
}

.main-header .navbar-custom-menu .navbar-nav > li > a {
  color: var(--text-primary) !important;
  padding: 20px 16px;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.main-header .navbar-custom-menu .navbar-nav > li > a:hover {
  background: var(--hover-bg) !important;
  color: var(--primary-color) !important;
}

.sidebar-toggle {
  color: var(--text-primary) !important;
  transition: all var(--transition-fast);
  padding: 20px 16px !important;
}

.sidebar-toggle:hover {
  background: var(--hover-bg) !important;
  color: var(--primary-color) !important;
}

/* ============================================
   MODERN SIDEBAR
   ============================================ */
.main-sidebar {
  background: var(--bg-secondary) !important;
  border-right: 1px solid var(--border-color) !important;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.sidebar-menu {
  padding: 12px 0;
}

.sidebar-menu > li > a {
  padding: 14px 20px !important;
  color: var(--text-primary) !important;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  font-weight: 500;
  display: flex;
  align-items: center;
}

.sidebar-menu > li > a > i {
  font-size: 18px;
  margin-right: 12px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.sidebar-menu > li > a:hover,
.sidebar-menu > li.active > a {
  background: var(--hover-bg) !important;
  color: var(--primary-color) !important;
  border-left-color: var(--primary-color);
}

.sidebar-menu > li > a:hover > i,
.sidebar-menu > li.active > a > i {
  color: var(--primary-color) !important;
  transform: translateX(2px);
}

.sidebar-menu .treeview-menu {
  background: var(--bg-primary) !important;
  padding: 8px 0;
}

.sidebar-menu .treeview-menu > li > a {
  padding: 10px 20px 10px 45px !important;
  color: var(--text-secondary) !important;
  font-size: 13px;
  transition: all var(--transition-fast);
}

.sidebar-menu .treeview-menu > li > a:hover {
  background: var(--bg-secondary) !important;
  color: var(--primary-color) !important;
  padding-left: 50px !important;
}

.user-panel {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  padding: 20px !important;
  margin: 0 0 20px 0 !important;
  border-radius: 0;
}

.user-panel .image img {
  border: 3px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-base);
}

.user-panel .image img:hover {
  transform: scale(1.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.user-panel .info {
  color: white !important;
}

.user-panel .info p {
  font-weight: 600;
  margin-bottom: 4px;
  color: white !important;
}

.user-panel .info a {
  color: rgba(255, 255, 255, 0.8) !important;
  font-size: 12px;
}

/* ============================================
   CONTENT AREA
   ============================================ */
.content-wrapper {
  background: var(--bg-primary) !important;
  min-height: calc(100vh - 64px) !important;
  padding: 24px;
}

.content-header {
  margin-bottom: 24px;
  padding: 0 !important;
}

.content-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px 0;
  letter-spacing: -0.5px;
}

.content-header .breadcrumb {
  background: transparent !important;
  padding: 0;
  margin: 0;
}

/* ============================================
   MODERN BOXES
   ============================================ */
.box {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-sm) !important;
  margin-bottom: 24px;
  transition: all var(--transition-base);
  overflow: hidden;
}

.box:hover {
  box-shadow: var(--shadow-md) !important;
  transform: translateY(-2px);
}

.box-header {
  background: transparent !important;
  border-bottom: 1px solid var(--border-color) !important;
  padding: 20px 24px !important;
}

.box-header .box-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.box-body {
  padding: 24px !important;
}

.box-footer {
  background: var(--bg-primary) !important;
  border-top: 1px solid var(--border-color) !important;
  padding: 16px 24px !important;
}

/* ============================================
   INFO BOXES / SMALL BOXES
   ============================================ */
.info-box,
.small-box {
  background: var(--bg-secondary) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-md) !important;
  border: none !important;
  transition: all var(--transition-base);
  overflow: hidden;
  position: relative;
}

.info-box:hover,
.small-box:hover {
  box-shadow: var(--shadow-lg) !important;
  transform: translateY(-4px);
}

.info-box-icon {
  border-radius: var(--radius-md) !important;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

.small-box .icon {
  font-size: 70px !important;
  opacity: 0.15;
}

.small-box-footer {
  background: rgba(0, 0, 0, 0.03) !important;
  padding: 12px 0 !important;
  transition: all var(--transition-fast);
}

.small-box-footer:hover {
  background: rgba(0, 0, 0, 0.06) !important;
}

/* ============================================
   MODERN BUTTONS
   ============================================ */
.btn {
  border-radius: var(--radius-md) !important;
  padding: 10px 20px !important;
  font-weight: 500 !important;
  transition: all var(--transition-fast) !important;
  border: none !important;
  text-transform: none;
  letter-spacing: 0.3px;
  box-shadow: var(--shadow-sm) !important;
}

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

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
  color: white !important;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%) !important;
}

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

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

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

.btn-info {
  background: var(--info-color) !important;
  color: white !important;
}

/* ============================================
   MODERN FORMS
   ============================================ */
.form-control {
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  padding: 10px 16px !important;
  font-size: 14px !important;
  transition: all var(--transition-fast) !important;
  background: var(--bg-secondary) !important;
}

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

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 14px;
}

.input-group .input-group-addon {
  background: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) 0 0 var(--radius-md) !important;
  color: var(--text-secondary);
}

/* ============================================
   MODERN TABLES
   ============================================ */
.table {
  background: var(--bg-secondary) !important;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table thead th {
  background: var(--bg-primary) !important;
  border-bottom: 2px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  font-weight: 600 !important;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.5px;
  padding: 16px !important;
}

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

.table tbody tr:hover {
  background: var(--hover-bg) !important;
}

.table tbody td {
  padding: 14px 16px !important;
  color: var(--text-primary);
  vertical-align: middle !important;
}

/* ============================================
   MODERN BADGES & LABELS
   ============================================ */
.badge,
.label {
  border-radius: var(--radius-sm) !important;
  padding: 4px 10px !important;
  font-weight: 500 !important;
  font-size: 11px !important;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.label-success {
  background: var(--success-color) !important;
}

.label-danger {
  background: var(--danger-color) !important;
}

.label-warning {
  background: var(--warning-color) !important;
}

.label-info {
  background: var(--info-color) !important;
}

/* ============================================
   MODERN ALERTS
   ============================================ */
.alert {
  border-radius: var(--radius-md) !important;
  border: none !important;
  padding: 16px 20px !important;
  box-shadow: var(--shadow-sm) !important;
}

.alert-success {
  background: #D1FAE5 !important;
  color: #065F46 !important;
}

.alert-danger {
  background: #FEE2E2 !important;
  color: #991B1B !important;
}

.alert-warning {
  background: #FEF3C7 !important;
  color: #92400E !important;
}

.alert-info {
  background: #DBEAFE !important;
  color: #1E40AF !important;
}

/* ============================================
   MODERN PAGINATION
   ============================================ */
.pagination > li > a,
.pagination > li > span {
  border-radius: var(--radius-md) !important;
  margin: 0 4px;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  transition: all var(--transition-fast);
}

.pagination > li > a:hover {
  background: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
  color: white !important;
  transform: translateY(-2px);
}

.pagination > .active > a {
  background: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
}

/* ============================================
   MODERN CARDS
   ============================================ */
.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }

/* ============================================
   RESPONSIVE IMPROVEMENTS
   ============================================ */
@media (max-width: 768px) {
  .content-wrapper {
    padding: 16px;
  }
  
  .box-header,
  .box-body,
  .box-footer {
    padding: 16px !important;
  }
  
  .content-header h1 {
    font-size: 22px;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

/* ============================================
   DARK MODE SUPPORT (Optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-dark: #F9FAFB;
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-light: #9CA3AF;
    --border-color: #374151;
    --hover-bg: #374151;
  }
}