/* ============================================================================
   SMART NOTE 2.0 - DESIGN SYSTEM & COMPONENT LIBRARY
   ============================================================================
   
   Core CSS file implementing:
   - Design system variables
   - Accessibility standards (WCAG 2.1 AA+)
   - Responsive breakpoints (Mobile-first)
   - AI agent UI patterns
   - Performance optimizations
   
   ========================================================================== */

/* ============================================================================
   1. ROOT VARIABLES & DESIGN TOKENS
   ============================================================================ */

:root {
  /* ========== COLOR PALETTE ========== */
  
  /* Primary Colors - Zvonk Navy (Deep, Royal, Infinite) */
  --color-primary-50: #f8fafc;
  --color-primary-100: #f1f5f9;
  --color-primary-200: #e2e8f0;
  --color-primary-300: #cbd5e1;
  --color-primary-400: #94a3b8;
  --color-primary-500: #64748b;
  --color-primary-600: #475569;
  --color-primary-700: #334155;
  --color-primary-800: #1e293b;
  --color-primary-900: #0f172a;       /* Deepest Navy Background */
  --color-primary: #0f172a;           /* Main Brand Color */
  --color-primary-dark: #020617;      /* Almost Black Navy */
  --color-primary-light: #334155;     /* Lighter Navy */
  
  /* Semantic - Success */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-300: #86efac;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success: #10b981;
  
  /* Semantic - Accent/Gold (The "Ring") */
  --color-gold-100: #fef9c3;
  --color-gold-300: #fcd34d;
  --color-gold-400: #fbbf24;
  --color-gold-500: #f59e0b;
  --color-gold-600: #d97706;
  --color-gold-700: #b45309;
  
  --color-accent: #fbbf24;            /* Bright Gold */
  --color-accent-hover: #d97706;      /* Deep Gold */
  
  /* Semantic - Warning */
  --color-warning: #fbbf24;           /* Gold */
  --color-warning-light: #fcd34d;
  
  /* Semantic - Danger */
  --color-danger: #ef4444;
  --color-danger-light: #fca5a5;
  
  /* Semantic - Info */
  --color-info: #3b82f6;
  --color-info-light: #bfdbfe;
  
  /* Semantic - AI */
  --color-ai-thinking: #d97706;       /* Gold pulsing */
  --color-ai-complete: #10b981;
  --color-user-action: #fbbf24;       /* Gold trigger */
  
  /* Neutral - Gray Scale (9-step) */
  --color-gray-0: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* ========== TYPOGRAPHY ========== */
  
  /* Font Stack - System fonts for performance */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-brand: 'Playfair Display', 'Georgia', 'Times New Roman', serif; /* Elegant Serif */
  --font-family-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  
  /* Font Sizes - Perfect Fourth Scale (1.25x) */
  --font-size-xs: 12px;               /* 0.75rem - captions */
  --font-size-sm: 14px;               /* 0.875rem - body, labels */
  --font-size-base: 16px;             /* 1rem - standard body */
  --font-size-lg: 20px;               /* 1.25rem - subheading */
  --font-size-xl: 24px;               /* 1.5rem - heading 2 */
  --font-size-2xl: 32px;              /* 2rem - heading 1 */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Line Heights */
  --line-height-tight: 1.25;          /* Headings */
  --line-height-normal: 1.5;          /* Body text */
  --line-height-relaxed: 1.75;        /* Long-form content */
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  
  /* ========== SPACING SYSTEM (8px base) ========== */
  
  --space-0: 0;
  --space-1: 2px;                     /* Micro: borders, outlines */
  --space-2: 4px;                     /* Extra small: internal padding */
  --space-3: 6px;                     /* Extra small: spacing */
  --space-4: 8px;                     /* Small: base unit */
  --space-5: 10px;                    /* Small-medium */
  --space-6: 12px;                    /* Medium: component padding */
  --space-7: 14px;                    /* Medium-large */
  --space-8: 16px;                    /* Large: section spacing */
  --space-10: 20px;                   /* Extra large */
  --space-12: 24px;                   /* 2x large */
  --space-16: 32px;                   /* 3x large */
  --space-20: 40px;                   /* 4x large */
  --space-24: 48px;                   /* 5x large */
  
  /* ========== BORDER RADIUS ========== */
  
  --radius-none: 0;
  --radius-sm: 6px;                   /* Buttons, small elements */
  --radius-md: 8px;                   /* Cards, inputs, modals */
  --radius-lg: 12px;                  /* Large containers, sections */
  --radius-xl: 16px;                  /* Hero sections, large cards */
  --radius-2xl: 20px;                 /* Extra large containers */
  --radius-full: 9999px;              /* Circles, pills, badges */
  
  /* ========== SHADOWS ========== */
  
  /* Elevation 1 - Subtle, subtle elements */
  --shadow-sm: 0 1px 2px 0 rgba(124, 58, 237, 0.05);
  
  /* Elevation 2 - Cards, small overlays */
  --shadow-md: 0 4px 6px -1px rgba(124, 58, 237, 0.1), 0 2px 4px -1px rgba(124, 58, 237, 0.06);
  
  /* Elevation 3 - Larger overlays */
  --shadow-lg: 0 10px 15px -3px rgba(124, 58, 237, 0.1), 0 4px 6px -2px rgba(124, 58, 237, 0.05);
  
  /* Elevation 4 - Modals, dropdowns */
  --shadow-xl: 0 20px 25px -5px rgba(124, 58, 237, 0.1), 0 10px 10px -5px rgba(124, 58, 237, 0.04);
  
  /* Elevation 5 - Floating action buttons, popovers */
  --shadow-2xl: 0 25px 50px -12px rgba(124, 58, 237, 0.25);
  
  /* ========== TRANSITIONS ========== */
  
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* ========== Z-INDEX LAYERS ========== */
  
  --z-dropdown: 1000;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* ========== BREAKPOINTS (Mobile-first) ========== */
  
  /* Note: Use as max-width for mobile-first approach */
  --breakpoint-sm: 640px;             /* Small phones */
  --breakpoint-md: 768px;             /* Tablets */
  --breakpoint-lg: 1024px;            /* Desktop */
  --breakpoint-xl: 1280px;            /* Large screens */
  
  /* ========== FOCUS RING (Accessibility) ========== */
  
  --focus-ring: 3px solid var(--color-accent);
  --focus-ring-offset: 2px;
  
  /* ========== ANIMATIONS ========== */
  
  --animate-duration-fast: 0.3s;
  --animate-duration-base: 0.5s;
  --animate-duration-slow: 0.8s;
  
  /* ========== ALIASES FOR DASHBOARD COMPATIBILITY ========== */
  
  /* Spacing aliases (dashboard.css uses --spacing-X) */
  --spacing-1: var(--space-1);
  --spacing-2: var(--space-2);
  --spacing-3: var(--space-3);
  --spacing-4: var(--space-4);
  --spacing-5: var(--space-5);
  --spacing-6: var(--space-6);
  --spacing-8: var(--space-8);
  --spacing-12: var(--space-12);
  --spacing-16: var(--space-16);
  
  /* Border radius aliases (dashboard.css uses --border-radius-X) */
  --border-radius-sm: var(--radius-sm);
  --border-radius-md: var(--radius-md);
  --border-radius-lg: var(--radius-lg);
  --border-radius-xl: var(--radius-xl);
  --border-radius-full: var(--radius-full);
  
  /* Semantic color aliases - Light Mode Defaults */
  --color-background-primary: var(--color-gray-0);
  --color-background-secondary: var(--color-gray-50);
  --color-background-tertiary: var(--color-gray-100);
  
  --color-border-primary: var(--color-gray-200);
  --color-border-secondary: var(--color-gray-300);
  
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-700);
  --color-text-tertiary: var(--color-gray-500);
  --color-text-on-primary: var(--color-gray-0);
}

/* Dark Mode Overrides (Zvonk Identity) */
body.dark-mode {
  --color-background-primary: var(--color-primary-900);   /* Deep Navy */
  --color-background-secondary: var(--color-primary-800); /* Navy Card Bg */
  --color-background-tertiary: var(--color-primary-700);  /* Navy Border/Hover */
  
  --color-border-primary: var(--color-primary-700);
  --color-border-secondary: var(--color-primary-600);
  
  --color-text-primary: var(--color-primary-50);        /* White/Slate-50 */
  --color-text-secondary: var(--color-primary-300);     /* Slate-300 */
  --color-text-tertiary: var(--color-primary-400);      /* Slate-400 */
  --color-text-on-primary: var(--color-gray-0);
}

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

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

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

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-background-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Light mode support (Optional/Secondary now) */
@media (prefers-color-scheme: light) {
  /* We enforce Dark Mode for Zvonk Brand Identity */
  /* If we wanted light mode, we'd override here, but we want to stick to the Navy Brand */
}

/* Dark mode CSS variable overrides - Default is now Dark */
/* body.dark-mode is handled by default now */

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

/* Skip to main content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: var(--z-tooltip);
  border-radius: 0 0 var(--radius-md) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  
  &:focus {
    top: 0;
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
  }
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
}

h1 {
  font-size: var(--font-size-2xl);
  letter-spacing: var(--letter-spacing-tight);
}

h2 {
  font-size: var(--font-size-xl);
}

h3 {
  font-size: var(--font-size-lg);
}

h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--space-4);
  
  &:last-child {
    margin-bottom: 0;
  }
}

small {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

strong {
  font-weight: var(--font-weight-semibold);
}

em {
  font-style: italic;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  
  &:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
  }
  
  &:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--radius-sm);
  }
}

code {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  background: var(--color-background-tertiary);
  color: var(--color-text-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ============================================================================
   4. BUTTON COMPONENT
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  
  padding: 10px 16px;                 /* 40px height */
  border: none;
  border-radius: var(--radius-sm);
  
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  
  cursor: pointer;
  user-select: none;
  
  transition: all var(--transition-fast);
  
  /* Focus ring for accessibility */
  &:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
  }
  
  /* Disabled state */
  &:disabled {
    opacity: 0.6;
    cursor: not-allowed;
  }
  
  /* Active state */
  &:active:not(:disabled) {
    transform: scale(0.98);
  }
  
  /* Icons in buttons */
  svg {
    width: 18px;
    height: 18px;
  }
}

/* Primary Button - Main action (CTA) - Zvonk Gold */
.btn-primary {
  background: linear-gradient(135deg, var(--color-gold-400) 0%, var(--color-gold-600) 100%);
  color: var(--color-primary-900); /* Dark text on gold */
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(180, 83, 9, 0.2);
  
  &:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-gold-300) 0%, var(--color-gold-500) 100%);
    box-shadow: 0 6px 16px rgba(180, 83, 9, 0.3);
    transform: translateY(-2px);
  }
  
  &:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(180, 83, 9, 0.2);
  }
}

/* Secondary Button - Less important action */
.btn-secondary {
  background: var(--color-background-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-primary);
  
  &:hover:not(:disabled) {
    background: var(--color-background-tertiary);
    border-color: var(--color-border-secondary);
  }
}

/* Danger Button - Destructive action */
.btn-danger {
  background: var(--color-danger);
  color: white;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
  
  &:hover:not(:disabled) {
    background: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  }
}

/* Success Button - Positive action */
.btn-success {
  background: var(--color-success);
  color: white;
  
  &:hover:not(:disabled) {
    background: #059669;
  }
}

/* Small Button variant */
.btn-sm {
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  min-height: 32px;
}

/* Large Button variant */
.btn-lg {
  padding: 12px 20px;
  font-size: var(--font-size-base);
  min-height: 48px;
}

/* Full width button */
.btn-block {
  width: 100%;
}

/* ============================================================================
   5. INPUT COMPONENT
   ============================================================================ */

/* ============================================================================
   5. INPUT COMPONENT
   ============================================================================ */

.input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-md);
  
  font-family: inherit;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-background-secondary);
  
  transition: all var(--transition-fast);
  
  &::placeholder {
    color: var(--color-text-tertiary);
  }
  
  /* Focus state */
  &:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.1);
  }
  
  &:focus-visible {
    outline: var(--focus-ring);
  }
  
  /* Disabled state */
  &:disabled {
    background: var(--color-primary-800);
    color: var(--color-primary-500);
    cursor: not-allowed;
  }
  
  /* Error state */
  &.error {
    border-color: var(--color-danger);
    background: rgba(239, 68, 68, 0.1);
    
    &:focus {
      box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
    }
  }
  
  /* Success state */
  &.success {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
    
    &:focus {
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
  }
}

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

/* Input group (input with button/icon) */
.input-group {
  display: flex;
  align-items: stretch;
  gap: 0;
  
  .input {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    flex: 1;
  }
  
  .btn {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
  }
}

/* Input with icon */
.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
  
  .input {
    padding-right: 40px;
  }
  
  .input-icon {
    position: absolute;
    right: 12px;
    font-size: var(--font-size-base);
    pointer-events: none;
    color: var(--color-primary-400);
  }
}

/* ============================================================================
   6. CARD COMPONENT
   ============================================================================ */

.card {
  background: var(--color-primary-800); /* Navy 800 */
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary-700);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  
  &:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-600);
  }
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-primary-700);
  
  h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin: 0;
    color: var(--color-primary-50);
  }
  
  .card-actions {
    display: flex;
    gap: var(--space-2);
  }
}

.card-content {
  color: var(--color-primary-200);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-primary-700);
  
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ============================================================================
   7. BADGE COMPONENT
   ============================================================================ */

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  
  /* Primary badge */
  &.primary {
    background: var(--color-primary-100);
    color: var(--color-primary-600);
  }
  
  /* Success badge */
  &.success {
    background: var(--color-success-100);
    color: var(--color-success-600);
  }
  
  /* Warning badge */
  &.warning {
    background: rgba(245, 158, 11, 0.1);
    color: #b45309;
  }
  
  /* Danger badge */
  &.danger {
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
  }
  
  /* Info badge */
  &.info {
    background: rgba(59, 130, 246, 0.1);
    color: #1e40af;
  }
  
  /* Gray badge */
  &.gray {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
  }
}

/* ============================================================================
   8. LOADING & ANIMATION STATES
   ============================================================================ */

/* Spinner animation */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Loading text with spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  padding: var(--space-4);
  
  .spinner {
    width: 14px;
    height: 14px;
  }
}

/* AI Thinking animation (three bouncing dots) */
.ai-thinking {
  display: flex;
  gap: 4px;
  align-items: center;
  
  .dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: bounce 1.4s infinite;
    
    &:nth-child(2) {
      animation-delay: 0.2s;
    }
    
    &:nth-child(3) {
      animation-delay: 0.4s;
    }
  }
}

@keyframes bounce {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Pulse animation */
.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

/* ============================================================================
   9. FORM COMPONENT
   ============================================================================ */

.form-group {
  margin-bottom: var(--space-6);
  
  &:last-child {
    margin-bottom: 0;
  }
}

.form-label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-2);
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
  
  .required {
    color: var(--color-danger);
    margin-left: 2px;
  }
}

.form-help {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  
  &::before {
    content: '⚠️';
  }
}

/* ============================================================================
   10. ACCESSIBILITY & FOCUS STATES
   ============================================================================ */

/* Default focus visible style for all interactive elements */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}

/* 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;
  }
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .btn,
  .input,
  .card {
    border-width: 2px;
  }
}

/* ============================================================================
   11. UTILITY CLASSES
   ============================================================================ */

/* Display utilities */


.visible {
  display: block;
}

/* Flex utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.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); }
.gap-8 { gap: var(--space-8); }

/* Padding utilities */
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Margin utilities */
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Text utilities */
.text-center { text-align: center; }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-muted { color: var(--color-gray-500); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }

/* ============================================================================
   12. RESPONSIVE UTILITIES (Mobile-first)
   ============================================================================ */

@media (max-width: 640px) {
  .hide-sm { display: none; }
}

@media (min-width: 768px) {
  .show-md { display: block; }
}

@media (min-width: 1024px) {
  .show-lg { display: block; }
}

/* ============================================================================
   END OF DESIGN SYSTEM
   ========================================================================== */