/* =========================
   WWC Admin Design System
   Enhanced Theme v2.0
   ========================= */

/* ===== CSS Variables ===== */
:root {
  /* Base colors */
  --bg: #fafbfc;
  --fg: #1f2937;
  
  /* Header */
  --header-bg: #ffffff;
  --header-fg: #111827;
  --header-border: #e5e7eb;
  
  /* Cards & Surfaces */
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Primary Brand Color */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;
  
  /* Accent Colors */
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-light: #ede9fe;
  
  /* Status Colors */
  --success: #10b981;
  --success-bg: #d1fae5;
  --success-border: #6ee7b7;
  
  --warning: #f59e0b;
  --warning-bg: #fef3c7;
  --warning-border: #fbbf24;
  
  --danger: #ef4444;
  --danger-bg: #fee2e2;
  --danger-border: #fca5a5;
  
  --info: #3b82f6;
  --info-bg: #dbeafe;
  --info-border: #93c5fd;
  
  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-inverse: #ffffff;
  
  /* Borders */
  --border-light: #f3f4f6;
  --border-default: #e5e7eb;
  --border-medium: #d1d5db;
  --border-dark: #9ca3af;
  
  /* Inputs */
  --input-bg: #ffffff;
  --input-fg: #111827;
  --input-border: #d1d5db;
  --input-border-focus: #2563eb;
  --input-placeholder: #9ca3af;
  
  /* Links */
  --link: #2563eb;
  --link-hover: #1d4ed8;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
}

/* Dark Theme */
html[data-theme="dark"] {
  --bg: #0f172a;
  --fg: #f1f5f9;
  
  --header-bg: #1e293b;
  --header-fg: #f1f5f9;
  --header-border: #334155;
  
  --card-bg: #1e293b;
  --card-border: #334155;
  --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
  --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #1e3a8a;
  --primary-dark: #1e40af;
  
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  
  --border-light: #1e293b;
  --border-default: #334155;
  --border-medium: #475569;
  --border-dark: #64748b;
  
  --input-bg: #0f172a;
  --input-fg: #f1f5f9;
  --input-border: #475569;
  --input-border-focus: #3b82f6;
  
  --link: #60a5fa;
  --link-hover: #93c5fd;
  
  --success-bg: #065f46;
  --warning-bg: #78350f;
  --danger-bg: #7f1d1d;
  --info-bg: #1e3a8a;
}

/* System Dark Theme */
@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    --bg: #0f172a;
    --fg: #f1f5f9;
    --header-bg: #1e293b;
    --header-fg: #f1f5f9;
    --header-border: #334155;
    --card-bg: #1e293b;
    --card-border: #334155;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border-light: #1e293b;
    --border-default: #334155;
    --border-medium: #475569;
    --input-bg: #0f172a;
    --input-fg: #f1f5f9;
    --input-border: #475569;
    --link: #60a5fa;
    --link-hover: #93c5fd;
  }
}

/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Header ===== */
.wwc-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--header-bg);
  color: var(--header-fg);
  border-bottom: 1px solid var(--header-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.wwc-header .logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.wwc-hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.wwc-hamburger:hover {
  background: var(--border-light);
}

.wwc-hamburger span {
  width: 20px;
  height: 2px;
  background: var(--header-fg);
  border-radius: 2px;
}

.wwc-nav {
  display: none;
  align-items: center;
  gap: var(--spacing-md);
}

.wwc-nav a {
  color: var(--header-fg);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background 0.2s;
}

.wwc-nav a:hover {
  background: var(--border-light);
}

.theme-picker {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 14px;
}

.theme-picker select {
  padding: 6px 32px 6px 10px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  background: var(--input-bg);
  color: var(--input-fg);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
}

@media (min-width: 768px) {
  .wwc-nav {
    display: flex;
  }
  .wwc-hamburger {
    display: none;
  }
}

/* ===== App Switcher ===== */
.app-switcher-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
  align-items: flex-start;
  justify-content: flex-start;
  padding: var(--spacing-md);
}

.app-switcher {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--card-shadow-hover);
  width: 100%;
  max-width: 320px;
  max-height: 80vh;
  overflow: auto;
}

.app-switcher-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--card-border);
}

.app-switcher-title {
  font-size: 18px;
  font-weight: 700;
}

.app-switcher-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.app-switcher-close:hover {
  background: var(--border-light);
  color: var(--text-primary);
}

.app-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.2s;
}

.app-link:hover {
  background: var(--border-light);
}

.app-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  padding: 4px 8px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
}

.app-switcher-empty {
  padding: var(--spacing-2xl);
  text-align: center;
  color: var(--text-secondary);
}

/* ===== Page Layout ===== */
.wwc-page {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.wwc-page-header {
  margin-bottom: var(--spacing-2xl);
}

.wwc-page-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-sm);
  color: var(--text-primary);
}

.wwc-page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* ===== Grid System ===== */
.wwc-grid {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .wwc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .wwc-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .wwc-span-2 {
    grid-column: span 2;
  }
  
  .wwc-span-3 {
    grid-column: span 3;
  }
}

@media (min-width: 1200px) {
  .wwc-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .wwc-span-4 {
    grid-column: span 4;
  }
}

/* ===== Cards ===== */
.wwc-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.3s, transform 0.3s;
}

.wwc-card:hover {
  box-shadow: var(--card-shadow-hover);
}

.wwc-card-header {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.wwc-card-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 var(--spacing-xs);
  color: var(--text-primary);
}

.wwc-card-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.wwc-card-body {
  color: var(--text-primary);
}

.wwc-card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

/* Card Variants */
.wwc-card-elevated {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.wwc-card-interactive {
  cursor: pointer;
}

.wwc-card-interactive:hover {
  transform: translateY(-2px);
}

/* ===== Buttons ===== */
.wwc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.wwc-btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
}

.wwc-btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.wwc-btn-secondary {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

.wwc-btn-secondary:hover {
  background: var(--border-light);
}

.wwc-btn-success {
  background: var(--success);
  color: var(--text-inverse);
}

.wwc-btn-success:hover {
  background: #059669;
}

.wwc-btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
}

.wwc-btn-danger:hover {
  background: #dc2626;
}

.wwc-btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.wwc-btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

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

/* ===== Form Elements ===== */
.wwc-form-group {
  margin-bottom: var(--spacing-md);
}

.wwc-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.wwc-input,
.wwc-textarea,
.wwc-select {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--input-fg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.wwc-input:focus,
.wwc-textarea:focus,
.wwc-select:focus {
  outline: none;
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.wwc-input-group {
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== Tables ===== */
.wwc-table-container {
  overflow-x: auto;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
}

.wwc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.wwc-table th,
.wwc-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
}

.wwc-table thead {
  background: var(--border-light);
  position: sticky;
  top: 0;
  z-index: 10;
}

.wwc-table th {
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.wwc-table tbody tr {
  border-bottom: 1px solid var(--border-light);
  transition: background 0.2s;
}

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

.wwc-table tbody tr:hover {
  background: var(--border-light);
}

.wwc-table td {
  color: var(--text-primary);
  vertical-align: middle;
}

/* ===== Badges & Pills ===== */
.wwc-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.wwc-badge-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.wwc-badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

.wwc-badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

.wwc-badge-info {
  background: var(--info-bg);
  color: var(--info);
  border: 1px solid var(--info-border);
}

.wwc-badge-primary {
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== Alerts ===== */
.wwc-alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid;
}

.wwc-alert-success {
  background: var(--success-bg);
  border-color: var(--success);
  color: #065f46;
}

.wwc-alert-warning {
  background: var(--warning-bg);
  border-color: var(--warning);
  color: #92400e;
}

.wwc-alert-danger {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: #991b1b;
}

.wwc-alert-info {
  background: var(--info-bg);
  border-color: var(--info);
  color: #1e40af;
}

/* ===== Stats ===== */
.wwc-stats {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.wwc-stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.wwc-stat-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.wwc-stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.wwc-stat-change {
  font-size: 13px;
  margin-top: var(--spacing-sm);
  font-weight: 600;
}

.wwc-stat-change.positive {
  color: var(--success);
}

.wwc-stat-change.negative {
  color: var(--danger);
}

/* ===== Utilities ===== */
.wwc-text-muted {
  color: var(--text-secondary);
}

.wwc-text-center {
  text-align: center;
}

.wwc-text-right {
  text-align: right;
}

.wwc-mt-sm { margin-top: var(--spacing-sm); }
.wwc-mt-md { margin-top: var(--spacing-md); }
.wwc-mt-lg { margin-top: var(--spacing-lg); }
.wwc-mt-xl { margin-top: var(--spacing-xl); }

.wwc-mb-sm { margin-bottom: var(--spacing-sm); }
.wwc-mb-md { margin-bottom: var(--spacing-md); }
.wwc-mb-lg { margin-bottom: var(--spacing-lg); }
.wwc-mb-xl { margin-bottom: var(--spacing-xl); }

.wwc-flex {
  display: flex;
}

.wwc-flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.wwc-flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.wwc-flex-wrap {
  flex-wrap: wrap;
}

.wwc-gap-sm { gap: var(--spacing-sm); }
.wwc-gap-md { gap: var(--spacing-md); }
.wwc-gap-lg { gap: var(--spacing-lg); }

/* ===== Empty States ===== */
.wwc-empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-secondary);
}

.wwc-empty-state-icon {
  font-size: 48px;
  opacity: 0.5;
  margin-bottom: var(--spacing-md);
}

.wwc-empty-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.wwc-empty-state-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== Loading States ===== */
.wwc-loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: wwc-spin 0.8s linear infinite;
}

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

/* ===== Responsive Adjustments ===== */
@media (max-width: 767px) {
  .wwc-page {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .wwc-page-title {
    font-size: 24px;
  }
  
  .wwc-table-container {
    font-size: 13px;
  }
  
  .wwc-table th,
  .wwc-table td {
    padding: 8px 12px;
  }
}