/**
 * ClaudeServer Design System v2.0
 * Professional dark theme with glassmorphism & material design
 * Includes smooth animations and micro-interactions
 */

/* ========================================
   1. DESIGN TOKENS
   ======================================== */

:root {
  /* Color Palette - Dark Theme with depth */
  --color-bg-base: #07090d;
  --color-bg-surface: rgba(22, 27, 34, 0.8);
  --color-bg-elevated: rgba(28, 33, 40, 0.9);
  --color-bg-overlay: rgba(33, 38, 45, 0.95);
  --color-bg-hover: rgba(38, 44, 54, 0.8);
  --color-bg-active: rgba(45, 51, 59, 0.9);

  /* Solid backgrounds for non-glass elements */
  --color-bg-solid-surface: #161b22;
  --color-bg-solid-elevated: #1c2128;
  --color-bg-solid-overlay: #21262d;

  /* Text Colors */
  --color-text-primary: #f0f6fc;
  --color-text-secondary: #9eaab8;
  --color-text-muted: #6e7681;
  --color-text-placeholder: #484f58;

  /* Brand & Accent - Vibrant blue with glow */
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-muted: rgba(59, 130, 246, 0.15);
  --color-accent-glow: rgba(59, 130, 246, 0.4);

  /* Status Colors - More vibrant */
  --color-success: #22c55e;
  --color-success-muted: rgba(34, 197, 94, 0.15);
  --color-success-glow: rgba(34, 197, 94, 0.3);
  --color-warning: #eab308;
  --color-warning-muted: rgba(234, 179, 8, 0.15);
  --color-warning-glow: rgba(234, 179, 8, 0.3);
  --color-danger: #ef4444;
  --color-danger-muted: rgba(239, 68, 68, 0.15);
  --color-danger-glow: rgba(239, 68, 68, 0.3);
  --color-info: #3b82f6;
  --color-info-muted: rgba(59, 130, 246, 0.15);
  --color-info-glow: rgba(59, 130, 246, 0.3);

  /* Borders - Subtle glass edges */
  --color-border-default: rgba(255, 255, 255, 0.08);
  --color-border-muted: rgba(255, 255, 255, 0.12);
  --color-border-subtle: rgba(255, 255, 255, 0.04);
  --color-border-glow: rgba(59, 130, 246, 0.3);

  /* Shadows - Material elevation system */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.5), 0 8px 10px rgba(0, 0, 0, 0.4);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 3px var(--color-accent-muted), 0 0 20px var(--color-accent-glow);
  --shadow-glow-sm: 0 0 0 2px var(--color-accent-muted);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.3);

  /* Glass effect */
  --glass-blur: blur(16px);
  --glass-blur-sm: blur(8px);
  --glass-blur-lg: blur(24px);

  /* Gradients */
  --gradient-shine: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
  --gradient-glow: radial-gradient(ellipse at center, var(--color-accent-glow) 0%, transparent 70%);
  --gradient-surface: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, transparent 100%);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.8125rem;  /* 13px */
  --font-size-md: 0.875rem;   /* 14px */
  --font-size-lg: 1rem;       /* 16px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 9999px;

  /* Transitions - Smooth easing */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-spring: 400ms cubic-bezier(0.175, 0.885, 0.32, 1.275);

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

  /* Layout */
  --sidebar-width: 260px;
  --header-height: 60px;
  --content-max-width: 1400px;
}

/* Light theme overrides */
[data-theme="light"] {
  --color-bg-base: #f8fafc;
  --color-bg-surface: rgba(255, 255, 255, 0.8);
  --color-bg-elevated: rgba(255, 255, 255, 0.95);
  --color-bg-overlay: rgba(248, 250, 252, 0.95);
  --color-bg-hover: rgba(241, 245, 249, 0.8);
  --color-bg-active: rgba(226, 232, 240, 0.9);

  --color-bg-solid-surface: #ffffff;
  --color-bg-solid-elevated: #f8fafc;
  --color-bg-solid-overlay: #f1f5f9;

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-text-placeholder: #94a3b8;

  --color-border-default: rgba(0, 0, 0, 0.08);
  --color-border-muted: rgba(0, 0, 0, 0.12);
  --color-border-subtle: rgba(0, 0, 0, 0.04);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.04);

  --gradient-shine: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0) 50%);
}

/* ========================================
   2. CSS RESET & BASE
   ======================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-base);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Ambient background glow */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

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

/* ========================================
   3. TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-sm); }

p {
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
  text-shadow: 0 0 12px var(--color-accent-glow);
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

code {
  background: var(--color-bg-overlay);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
}

/* ========================================
   4. BUTTONS - Material with micro-interactions
   ======================================== */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  color: var(--color-text-primary);
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    all var(--transition-fast),
    transform var(--transition-spring),
    box-shadow var(--transition-normal);
  white-space: nowrap;
  text-decoration: none;
  overflow: hidden;
}

/* Shine effect overlay */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-shine);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: inherit;
}

.btn:hover::before {
  opacity: 1;
}

.btn:hover:not(:disabled) {
  background: var(--color-bg-hover);
  border-color: var(--color-border-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-glow);
}

.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Button Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #2563eb 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-sm), 0 0 0 0 var(--color-accent-glow);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--color-accent-hover) 0%, #3b82f6 100%);
  box-shadow: var(--shadow-md), 0 0 20px var(--color-accent-glow);
  transform: translateY(-2px);
}

.btn-primary:active:not(:disabled) {
  box-shadow: var(--shadow-sm), 0 0 10px var(--color-accent-glow);
}

.btn-danger {
  background: var(--color-danger-muted);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
  box-shadow: var(--shadow-md), 0 0 20px var(--color-danger-glow);
}

.btn-success {
  background: var(--color-success-muted);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
  box-shadow: var(--shadow-md), 0 0 20px var(--color-success-glow);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  backdrop-filter: none;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-hover);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: var(--space-2);
  min-width: 40px;
  min-height: 40px;
}

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

/* ========================================
   5. FORM ELEMENTS - Glass morphism
   ======================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-label .required {
  color: var(--color-danger);
  margin-left: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-border-muted);
  background: var(--color-bg-hover);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
  background: var(--color-bg-elevated);
}

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

.form-input-sm,
.form-select-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* ========================================
   6. CARDS - Glassmorphism
   ======================================== */

.card {
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-fast);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--gradient-surface);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-elevated);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-muted);
  box-shadow: var(--shadow-lg);
}

.card-interactive:active {
  transform: translateY(0);
}

/* ========================================
   7. STATUS BADGES - Glowing indicators
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-full);
  backdrop-filter: var(--glass-blur-sm);
  transition: all var(--transition-fast);
}

.badge-running {
  background: var(--color-success-muted);
  color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success-glow);
}

.badge-stopped {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}

.badge-error {
  background: var(--color-danger-muted);
  color: var(--color-danger);
  animation: pulse-danger 2s ease-in-out infinite;
}

.badge-created, .badge-creating {
  background: var(--color-info-muted);
  color: var(--color-info);
}

.badge-admin {
  background: linear-gradient(135deg, var(--color-accent-muted) 0%, rgba(139, 92, 246, 0.15) 100%);
  color: var(--color-accent);
  border: 1px solid var(--color-accent-muted);
}

/* Status dot indicator */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot-running {
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success), 0 0 16px var(--color-success-glow);
  animation: pulse-glow 2s ease-in-out infinite;
}

.status-dot-stopped {
  background: var(--color-warning);
  box-shadow: 0 0 4px var(--color-warning-glow);
}

.status-dot-error {
  background: var(--color-danger);
  box-shadow: 0 0 8px var(--color-danger);
  animation: pulse-danger 1.5s ease-in-out infinite;
}

.status-dot-creating {
  background: var(--color-info);
  box-shadow: 0 0 8px var(--color-info);
  animation: pulse-info 1s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 8px var(--color-success), 0 0 16px var(--color-success-glow);
  }
  50% {
    opacity: 0.7;
    box-shadow: 0 0 4px var(--color-success), 0 0 8px var(--color-success-glow);
  }
}

@keyframes pulse-danger {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes pulse-info {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

/* ========================================
   8. TABLES - Material elevation
   ======================================== */

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

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
}

.table th {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-bg-elevated);
  backdrop-filter: var(--glass-blur-sm);
  position: sticky;
  top: 0;
}

.table tbody tr {
  transition: background var(--transition-fast), transform var(--transition-fast);
}

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

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

/* ========================================
   9. MODALS - Glassmorphism with animations
   ======================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: var(--glass-blur-sm);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fadeIn var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

.modal {
  background: var(--color-bg-solid-surface);
  backdrop-filter: var(--glass-blur-lg);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  box-shadow: var(--shadow-2xl);
  animation: modalSlideUp var(--transition-slow) cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--gradient-surface);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  background: var(--color-bg-elevated);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ========================================
   10. TOASTS - Material elevation + animations
   ======================================== */

.toast-container {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  background: var(--color-bg-solid-elevated);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  animation: toastSlideIn var(--transition-spring);
  pointer-events: auto;
}

.toast-success {
  border-color: var(--color-success);
  border-left: 3px solid var(--color-success);
  box-shadow: var(--shadow-xl), -4px 0 20px var(--color-success-glow);
}

.toast-error {
  border-color: var(--color-danger);
  border-left: 3px solid var(--color-danger);
  box-shadow: var(--shadow-xl), -4px 0 20px var(--color-danger-glow);
}

.toast-warning {
  border-color: var(--color-warning);
  border-left: 3px solid var(--color-warning);
  box-shadow: var(--shadow-xl), -4px 0 20px var(--color-warning-glow);
}

.toast-info {
  border-color: var(--color-info);
  border-left: 3px solid var(--color-info);
  box-shadow: var(--shadow-xl), -4px 0 20px var(--color-info-glow);
}

@keyframes toastSlideIn {
  from {
    transform: translateX(120%) scale(0.8);
    opacity: 0;
  }
  to {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

/* ========================================
   11. LOADING STATES - Enhanced animations
   ======================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-overlay) 0%,
    var(--color-bg-hover) 50%,
    var(--color-bg-overlay) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 60%;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border-default);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
}

.spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

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

/* Dot loading animation */
.loading-dots {
  display: inline-flex;
  gap: 4px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: dotBounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes dotBounce {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ========================================
   12. LAYOUT - COMMAND CENTER (Glassmorphism)
   ======================================== */

.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar - Glass panel */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--color-border-default);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: var(--z-sticky);
  transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--gradient-surface);
}

.sidebar-logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-3);
  overflow-y: auto;
}

.sidebar-section {
  margin-bottom: var(--space-4);
}

.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--space-2) var(--space-3);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.sidebar-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-shine);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.sidebar-link:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  text-decoration: none;
  transform: translateX(2px);
}

.sidebar-link:hover::before {
  opacity: 1;
}

.sidebar-link.active {
  background: linear-gradient(135deg, var(--color-accent-muted) 0%, rgba(59, 130, 246, 0.05) 100%);
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent-muted);
}

.sidebar-link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.sidebar-link:hover .sidebar-link-icon {
  transform: scale(1.1);
}

.sidebar-link-badge {
  margin-left: auto;
  background: var(--color-bg-overlay);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  min-width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-elevated);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, #8b5cf6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: #fff;
  box-shadow: 0 0 0 2px var(--color-bg-surface), 0 0 0 4px var(--color-accent-muted);
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-user-email {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-header {
  height: var(--header-height);
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--color-border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.main-header-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
}

.main-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.main-body {
  flex: 1;
  padding: var(--space-6);
  overflow-y: auto;
  animation: contentFadeIn var(--transition-slow) ease-out;
}

@keyframes contentFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: var(--space-5);
  left: var(--space-5);
  z-index: var(--z-sticky);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, #2563eb 100%);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-lg), 0 0 20px var(--color-accent-glow);
  cursor: pointer;
  transition: all var(--transition-spring);
}

.sidebar-toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl), 0 0 30px var(--color-accent-glow);
}

.sidebar-toggle:active {
  transform: scale(0.95);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: var(--glass-blur-sm);
  z-index: calc(var(--z-sticky) - 1);
  animation: fadeIn var(--transition-normal);
}

/* ========================================
   13. RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-2xl);
  }

  .sidebar-overlay.open {
    display: block;
  }

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

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

  .main-body {
    padding: var(--space-4);
  }
}

@media (max-width: 640px) {
  .modal {
    max-width: none;
    margin: var(--space-4);
    max-height: calc(100vh - var(--space-8));
    border-radius: var(--radius-xl);
  }

  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
  }

  .toast {
    max-width: none;
  }
}

/* ========================================
   14. UTILITY CLASSES
   ======================================== */

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flexbox */
.flex-col { flex-direction: column; }
.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; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Text */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-md { font-size: var(--font-size-md); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-center { text-align: center; }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Spacing */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.ml-auto { margin-left: auto; }
.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }

/* Width */
.w-full { width: 100%; }
.min-w-0 { min-width: 0; }

/* Borders */
.border { border: 1px solid var(--color-border-default); }
.border-t { border-top: 1px solid var(--color-border-default); }
.border-b { border-bottom: 1px solid var(--color-border-default); }
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Accessibility */
.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;
}

.focus-ring:focus-visible {
  outline: none;
  box-shadow: var(--shadow-glow);
}

/* ========================================
   15. ANIMATION UTILITIES
   ======================================== */

/* Entrance animations */
.animate-fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

.animate-slide-up {
  animation: slideUp var(--transition-normal) ease-out;
}

.animate-slide-down {
  animation: slideDown var(--transition-normal) ease-out;
}

.animate-scale-in {
  animation: scaleIn var(--transition-normal) cubic-bezier(0.34, 1.56, 0.64, 1);
}

.animate-bounce-in {
  animation: bounceIn var(--transition-bounce);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Stagger animation delays */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

/* Hover lift effect */
.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Hover glow effect */
.hover-glow {
  transition: box-shadow var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* Press effect */
.press-effect:active {
  transform: scale(0.98);
}

/* Glass effect utility */
.glass {
  background: var(--color-bg-surface);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-default);
}

.glass-lg {
  backdrop-filter: var(--glass-blur-lg);
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent) 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glow border on focus */
.glow-border:focus-within {
  box-shadow: var(--shadow-glow);
  border-color: var(--color-accent);
}