/**
 * Quantix Development - Global Design System
 * Modern, professional dashboard theme with glassmorphism effects
 * Version 1.5.3
 */

/* ============================================================
 * CSS VARIABLES - DESIGN TOKENS
 * ============================================================ */

:root {
  /* Primary Colors - Light Theme */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Accent Colors */
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-violet: #8b5cf6;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;

  /* Backgrounds - Light Theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(255, 255, 255, 0.95);

  /* Text Colors - Light Theme */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  /* Border Colors - Light Theme */
  --border-light: rgba(148, 163, 184, 0.2);
  --border-medium: rgba(148, 163, 184, 0.3);
  --border-heavy: rgba(148, 163, 184, 0.5);
  --border-accent: rgba(59, 130, 246, 0.5);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-bg-heavy: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
  --shadow-glow-accent: 0 0 30px rgba(59, 130, 246, 0.4);

  /* Status Colors */
  --success: #10b981;
  --success-light: #d1fae5;
  --success-dark: #059669;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --warning-dark: #d97706;
  --error: #ef4444;
  --error-light: #fee2e2;
  --error-dark: #dc2626;
  --info: #3b82f6;
  --info-light: #dbeafe;
  --info-dark: #2563eb;

  /* Layout */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
  --header-height: 70px;
  --border-radius-sm: 8px;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --border-radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
}

/* ============================================================
 * DARK THEME
 * ============================================================ */

[data-theme="dark"] {
  /* Backgrounds - Dark Theme */
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f1a;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(15, 15, 26, 0.9);
  --bg-card-hover: rgba(20, 20, 35, 0.95);

  /* Text Colors - Dark Theme */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Border Colors - Dark Theme */
  --border-light: rgba(59, 130, 246, 0.1);
  --border-medium: rgba(59, 130, 246, 0.2);
  --border-heavy: rgba(59, 130, 246, 0.3);
  --border-accent: rgba(59, 130, 246, 0.5);

  /* Glassmorphism - Dark */
  --glass-bg: rgba(15, 15, 26, 0.7);
  --glass-bg-heavy: rgba(15, 15, 26, 0.9);
  --glass-border: rgba(59, 130, 246, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* Shadows - Dark Theme with Blue Glow */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
  --shadow-glow-accent: 0 0 40px rgba(59, 130, 246, 0.5);

  /* Status Colors - Dark Theme */
  --success-light: rgba(16, 185, 129, 0.2);
  --warning-light: rgba(245, 158, 11, 0.2);
  --error-light: rgba(239, 68, 68, 0.2);
  --info-light: rgba(59, 130, 246, 0.2);
}

/* ============================================================
 * GLOBAL RESET & BASE STYLES
 * ============================================================ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

/* ============================================================
 * ANIMATED BACKGROUND
 * ============================================================ */

.quantix-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.quantix-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(6, 182, 212, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(16, 185, 129, 0.04) 0%, transparent 40%);
  animation: bgPulse 20s ease-in-out infinite alternate;
}

.quantix-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
}

[data-theme="dark"] .quantix-bg::before {
  background:
    radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
}

[data-theme="dark"] .quantix-bg::after {
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
}

@keyframes bgPulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ============================================================
 * TYPOGRAPHY
 * ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-violet) 50%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-accent {
  color: var(--primary-500);
}

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

/* ============================================================
 * BUTTONS
 * ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  color: var(--text-inverse);
  box-shadow: var(--shadow-md), 0 0 0 0 rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-500) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
  border: 2px solid var(--border-medium);
}

.btn-secondary:hover {
  background: var(--glass-bg-heavy);
  border-color: var(--primary-500);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  color: var(--text-inverse);
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(16, 185, 129, 0.4);
}

.btn-danger {
  background: linear-gradient(135deg, var(--error) 0%, var(--error-dark) 100%);
  color: var(--text-inverse);
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--error-dark) 0%, var(--error) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(239, 68, 68, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--border-radius);
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

/* ============================================================
 * CARDS
 * ============================================================ */

.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-accent);
}

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

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-title i {
  color: var(--primary-500);
}

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

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

/* Glass Card Variant */
.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.card-glass:hover {
  background: var(--glass-bg-heavy);
  box-shadow: var(--glass-shadow), var(--shadow-glow);
}

/* Stat Card */
.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-accent);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

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

.stat-change.negative {
  color: var(--error);
  background: var(--error-light);
}

/* ============================================================
 * FORMS
 * ============================================================ */

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--border-medium);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2364748b'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.5rem;
  padding-right: 2.5rem;
}

.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-500);
  cursor: pointer;
}

.form-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.form-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* ============================================================
 * BADGES
 * ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--border-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: var(--info-light);
  color: var(--primary-600);
  border: 1px solid var(--primary-500);
}

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

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

.badge-danger {
  background: var(--error-light);
  color: var(--error-dark);
  border: 1px solid var(--error);
}

.badge-neutral {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
}

.status-open {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success);
}

.status-closed {
  background: var(--error-light);
  color: var(--error);
  border: 1px solid var(--error);
}

.status-pending {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.status-claimed {
  background: var(--info-light);
  color: var(--info);
  border: 1px solid var(--info);
}

/* ============================================================
 * TABLES
 * ============================================================ */

.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-light);
}

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

.table th,
.table td {
  padding: 1rem 1.25rem;
  text-align: left;
}

.table th {
  background: var(--bg-tertiary);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-medium);
}

.table td {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
}

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

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

/* ============================================================
 * NAVIGATION & SIDEBAR
 * ============================================================ */

.sidebar {
  width: var(--sidebar-width);
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border-right: 1px solid var(--border-light);
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: var(--z-fixed);
  transition: all var(--transition-slow);
  box-shadow: var(--shadow-lg);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  background: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.sidebar-logo:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--border-accent);
}

.sidebar-logo i {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-logo-text h1 {
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.sidebar-logo-text p {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.sidebar-nav {
  padding: 1rem 0;
}

.nav-section {
  margin-bottom: 1.5rem;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0 1.5rem;
  margin-bottom: 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
  border-left: 3px solid transparent;
  position: relative;
}

.nav-item:hover {
  background: linear-gradient(90deg, var(--glass-bg) 0%, transparent 100%);
  color: var(--text-primary);
  border-left-color: var(--primary-500);
}

.nav-item.active {
  background: linear-gradient(90deg, var(--glass-bg) 0%, transparent 100%);
  color: var(--primary-500);
  border-left-color: var(--primary-500);
  font-weight: 600;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  right: 1rem;
  width: 6px;
  height: 6px;
  background: var(--primary-500);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary-500);
}

.nav-item i {
  width: 20px;
  text-align: center;
}

/* ============================================================
 * HEADER
 * ============================================================ */

.header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  box-shadow: var(--shadow-sm);
}

.header-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ============================================================
 * MAIN CONTENT
 * ============================================================ */

.main-content {
  margin-left: var(--sidebar-width);
  padding-top: var(--header-height);
  min-height: 100vh;
}

.content-wrapper {
  padding: 2rem;
  max-width: 1600px;
  margin: 0 auto;
}

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ============================================================
 * GRIDS
 * ============================================================ */

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

/* ============================================================
 * MODALS
 * ============================================================ */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-xl);
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow);
  box-shadow: var(--shadow-2xl);
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* ============================================================
 * NOTIFICATIONS / TOASTS
 * ============================================================ */

.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 400px;
  transform: translateX(120%);
  opacity: 0;
  transition: all var(--transition-bounce);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

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

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

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

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

.toast-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--error); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon { color: var(--info); }

.toast-message {
  flex: 1;
  font-size: 0.95rem;
}

/* ============================================================
 * LOADING STATES
 * ============================================================ */

.loader {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-light);
  border-top-color: var(--primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loader-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.loader-lg {
  width: 60px;
  height: 60px;
  border-width: 6px;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--border-radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 99999;
}

.loading-overlay.show {
  display: flex;
}

.loading-content {
  text-align: center;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-xl);
  padding: 3rem;
  max-width: 400px;
  box-shadow: var(--shadow-2xl);
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 5px solid var(--border-medium);
  border-top-color: var(--primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 2rem;
}

.loading-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-500);
  margin-bottom: 0.5rem;
}

.loading-subtext {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
 * TABS
 * ============================================================ */

.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 1.5rem;
}

.tab {
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

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

.tab.active {
  color: var(--primary-500);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-500);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

/* ============================================================
 * PROGRESS BARS
 * ============================================================ */

.progress-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500) 0%, var(--accent-cyan) 100%);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-slow);
}

.progress-bar.success .progress-fill {
  background: linear-gradient(90deg, var(--success) 0%, var(--success-dark) 100%);
}

.progress-bar.warning .progress-fill {
  background: linear-gradient(90deg, var(--warning) 0%, var(--warning-dark) 100%);
}

.progress-bar.danger .progress-fill {
  background: linear-gradient(90deg, var(--error) 0%, var(--error-dark) 100%);
}

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

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .header {
    left: 0;
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-wrapper {
    padding: 1rem;
  }

  .card {
    padding: 1rem;
  }

  .modal {
    padding: 1.5rem;
    max-width: 95%;
  }

  .toast-container {
    left: 1rem;
    right: 1rem;
    top: 1rem;
  }

  .toast {
    min-width: auto;
    max-width: none;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .btn-lg {
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* ============================================================
 * UTILITY CLASSES
 * ============================================================ */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.5rem; }

.m-0 { margin: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.5rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.5rem; }

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

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

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-full { border-radius: var(--border-radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-glow { box-shadow: var(--shadow-glow); }

.hidden { display: none !important; }
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
 * SCROLLBAR
 * ============================================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--border-radius-full);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-500);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-medium) transparent;
}

/* ============================================================
 * PRINT STYLES
 * ============================================================ */

@media print {
  .sidebar,
  .header,
  .toast-container,
  .modal-backdrop,
  .loading-overlay {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
    padding-top: 0;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}