/* ============================================
   ZDMind UI Prototype - Main Stylesheet
   Design System: Arco Design Style + Glassmorphism
   ============================================ */

/* --- CSS Variables (Light Theme) --- */
:root {
  /* Colors - Primary */
  --color-primary: #6366F1;
  --color-primary-light: #818CF8;
  --color-primary-dark: #4F46E5;
  --color-primary-bg: rgba(99, 102, 241, 0.1);
  --color-primary-border: rgba(99, 102, 241, 0.2);
  
  /* Colors - Functional */
  --color-success: #00B42A;
  --color-warning: #FF7D00;
  --color-danger: #F53F3F;
  --color-info: #86909C;
  
  /* Colors - Neutral */
  --color-text-1: #1D2129;
  --color-text-2: #4E5969;
  --color-text-3: #86909C;
  --color-text-4: #C9CDD4;
  
  --color-bg-1: #F2F3F5;
  --color-bg-2: #FFFFFF;
  --color-bg-3: #F7F8FA;
  --color-bg-4: #E5E6EB;
  
  --color-border: #E5E6EB;
  --color-border-light: #F2F3F5;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-bg-strong: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-base: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 48px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  
  /* Layout */
  --sidebar-width: 220px;
  --sidebar-width-collapsed: 64px;
  --header-height: 56px;
  --max-content-width: 1440px;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  /* Colors - Neutral */
  --color-text-1: #F7F8FA;
  --color-text-2: #C9CDD4;
  --color-text-3: #86909C;
  --color-text-4: #4E5969;
  
  --color-bg-1: #17171A;
  --color-bg-2: #232324;
  --color-bg-3: #2A2A2B;
  --color-bg-4: #37373A;
  
  --color-border: #37373A;
  --color-border-light: #2A2A2B;
  
  /* Glassmorphism */
  --glass-bg: rgba(35, 35, 36, 0.7);
  --glass-bg-strong: rgba(35, 35, 36, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.57;
  color: var(--color-text-1);
  background: var(--color-bg-1);
  min-height: 100vh;
  transition: background-color var(--transition-base), color var(--transition-base);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

/* --- Particle Background --- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* --- Glass Card --- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-base);
}

.glass-card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
}

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

/* Header */
.app-header {
  height: var(--header-height);
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-xl);
}

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

.header-logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-nav {
  display: flex;
  gap: var(--spacing-base);
}

.header-nav a {
  color: var(--color-text-2);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-base);
}

.header-search {
  position: relative;
  width: 240px;
}

.header-search input {
  width: 100%;
  height: 32px;
  padding: 0 var(--spacing-md) 0 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-3);
  color: var(--color-text-1);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.header-search input:focus {
  border-color: var(--color-primary);
  background: var(--color-bg-2);
}

.header-icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-2);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.header-icon-btn:hover {
  background: var(--color-bg-3);
  color: var(--color-primary);
}

.header-icon-btn .badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--color-danger);
  color: white;
  font-size: 10px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.header-user:hover {
  background: var(--color-bg-3);
}

.header-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--glass-border);
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  z-index: 90;
  padding: var(--spacing-base) 0;
  overflow-y: auto;
}

.sidebar-menu {
  list-style: none;
}

.sidebar-menu-item {
  margin-bottom: 2px;
}

.sidebar-menu-item a {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text-2);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-menu-item a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.sidebar-menu-item.active a {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-left-color: var(--color-primary);
}

.sidebar-menu-item .menu-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-menu-group {
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Main Content */
.app-main {
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  padding: var(--spacing-xl);
  min-height: calc(100vh - var(--header-height));
}

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

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.page-desc {
  color: var(--color-text-3);
  font-size: var(--font-size-sm);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 400;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  outline: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: white;
}

.btn-default {
  background: var(--color-bg-2);
  color: var(--color-text-1);
  border-color: var(--color-border);
}

.btn-default:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-text {
  background: transparent;
  color: var(--color-text-2);
  border-color: transparent;
  padding: var(--spacing-xs) var(--spacing-sm);
}

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  height: 24px;
}

.btn-lg {
  padding: var(--spacing-base) var(--spacing-xl);
  font-size: var(--font-size-md);
  height: 44px;
}

.btn-block {
  width: 100%;
}

/* --- Form --- */
.form-item {
  margin-bottom: var(--spacing-base);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
}

.form-input {
  width: 100%;
  height: 36px;
  padding: 0 var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-2);
  color: var(--color-text-1);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-bg);
}

.form-textarea {
  width: 100%;
  min-height: 80px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-2);
  color: var(--color-text-1);
  font-size: var(--font-size-sm);
  outline: none;
  resize: vertical;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-bg);
}

/* --- Tags / Badges --- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.tag-primary {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.tag-success {
  background: rgba(0, 180, 42, 0.1);
  color: var(--color-success);
}

.tag-warning {
  background: rgba(255, 125, 0, 0.1);
  color: var(--color-warning);
}

.tag-danger {
  background: rgba(245, 63, 63, 0.1);
  color: var(--color-danger);
}

.tag-default {
  background: var(--color-bg-3);
  color: var(--color-text-2);
}

/* --- Stats Cards --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-base);
  margin-bottom: var(--spacing-xl);
}

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

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-3);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: var(--color-text-1);
  line-height: 1.2;
  margin-bottom: var(--spacing-xs);
}

.stat-trend {
  font-size: var(--font-size-xs);
  display: flex;
  align-items: center;
  gap: 2px;
}

.stat-trend.up {
  color: var(--color-success);
}

.stat-trend.down {
  color: var(--color-danger);
}

/* --- Table --- */
.table-container {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-base);
  text-align: left;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border-light);
}

.table th {
  background: var(--color-bg-3);
  color: var(--color-text-2);
  font-weight: 500;
}

.table tr:hover td {
  background: var(--color-bg-3);
}

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

/* --- Avatar --- */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  font-weight: 500;
  overflow: hidden;
}

.avatar-sm {
  width: 24px;
  height: 24px;
  font-size: 10px;
}

.avatar-md {
  width: 32px;
  height: 32px;
  font-size: var(--font-size-xs);
}

.avatar-lg {
  width: 48px;
  height: 48px;
  font-size: var(--font-size-md);
}

.avatar-xl {
  width: 64px;
  height: 64px;
  font-size: var(--font-size-xl);
}

/* --- Progress --- */
.progress {
  height: 6px;
  background: var(--color-bg-4);
  border-radius: var(--radius-full);
  overflow: hidden;
}

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

/* --- Tabs --- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab-item {
  padding: var(--spacing-sm) var(--spacing-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition-fast);
}

.tab-item:hover {
  color: var(--color-primary);
}

.tab-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 500;
}

/* --- Modal / Drawer --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--color-bg-2);
  border-radius: var(--radius-lg);
  width: 480px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
}

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

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-3);
  color: var(--color-text-1);
}

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

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

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-xl);
  color: var(--color-text-3);
}

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

.empty-text {
  font-size: var(--font-size-sm);
}

/* --- Theme Toggle --- */
.theme-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-2);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-bg-3);
  color: var(--color-primary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .header-search {
    width: 180px;
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }
  
  .app-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .app-sidebar.mobile-open {
    transform: translateX(0);
  }
  
  .app-main {
    margin-left: 0;
    padding: var(--spacing-base);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
  
  .stat-value {
    font-size: var(--font-size-2xl);
  }
  
  .header-nav {
    display: none;
  }
  
  .header-search {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
}

@media (min-width: 769px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* iPad specific */
@media (min-width: 768px) and (max-width: 1024px) {
  :root {
    --sidebar-width: 200px;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Utility Classes --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

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

.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-muted { color: var(--color-text-3); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }

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

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}