/* ============================================================================
   WINCHESTER REAL ESTATE INTELLIGENCE - DESIGN SYSTEM
   World-Class Design System with Consistent Spacing, Micro-interactions & A11y
   Enhanced for proper contrast ratios and accessibility
   ============================================================================ */

:root {
  /* ===== COLOR SYSTEM (WCAG AA Compliant) ===== */
  --color-primary: #1a365d;
  --color-primary-light: #2c5282;
  --color-primary-dark: #0f1729;
  --color-secondary: #2563eb;
  --color-secondary-light: #3b82f6;
  --color-secondary-dark: #1d4ed8;
  --color-accent: #dc2626;
  --color-success: #16a34a;
  --color-warning: #ca8a04;
  --color-info: #0ea5e9;
  --color-danger: #dc2626;

  /* Enhanced Neutral Scale for Better Contrast */
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f4f4f5;
  --color-neutral-200: #e4e4e7;
  --color-neutral-300: #d4d4d8;
  --color-neutral-400: #a1a1aa;
  --color-neutral-500: #71717a;
  --color-neutral-600: #52525b;
  --color-neutral-700: #3f3f46;
  --color-neutral-800: #27272a;
  --color-neutral-900: #18181b;
  --color-neutral-950: #09090b;

  /* Light Theme - High Contrast Semantic Colors */
  --color-background: #ffffff;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-surface-subtle: #f8fafc;
  --color-surface-muted: #f1f5f9;

  --color-border: var(--color-neutral-200);
  --color-border-interactive: var(--color-secondary);
  --color-border-subtle: var(--color-neutral-100);

  /* Text Colors - High Contrast */
  --color-text-primary: var(--color-neutral-950);
  --color-text-secondary: var(--color-neutral-700);
  --color-text-muted: var(--color-neutral-500);
  --color-text-inverse: #ffffff;
  --color-text-on-primary: #ffffff;
  --color-text-on-secondary: #ffffff;
  --color-text-on-surface: var(--color-neutral-950);

  /* Interactive States */
  --color-focus: #2563eb;
  --color-focus-ring: rgba(37, 99, 235, 0.2);

  /* Status Colors with Good Contrast */
  --color-success-bg: #f0fdf4;
  --color-success-text: #166534;
  --color-success-border: #bbf7d0;

  --color-warning-bg: #fffbeb;
  --color-warning-text: #92400e;
  --color-warning-border: #fed7aa;

  --color-danger-bg: #fef2f2;
  --color-danger-text: #991b1b;
  --color-danger-border: #fecaca;

  --color-info-bg: #eff6ff;
  --color-info-text: #1e40af;
  --color-info-border: #bfdbfe;

  /* ===== SPACING SYSTEM (8pt Grid) ===== */
  --space-0: 0;
  --space-1: 0.125rem; /* 2px */
  --space-2: 0.25rem; /* 4px */
  --space-3: 0.375rem; /* 6px */
  --space-4: 0.5rem; /* 8px */
  --space-6: 0.75rem; /* 12px */
  --space-8: 1rem; /* 16px */
  --space-10: 1.25rem; /* 20px */
  --space-12: 1.5rem; /* 24px */
  --space-16: 2rem; /* 32px */
  --space-20: 2.5rem; /* 40px */
  --space-24: 3rem; /* 48px */
  --space-32: 4rem; /* 64px */
  --space-40: 5rem; /* 80px */
  --space-48: 6rem; /* 96px */
  --space-56: 7rem; /* 112px */
  --space-64: 8rem; /* 128px */

  /* ===== TYPOGRAPHY SYSTEM ===== */
  --font-family-base: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono",
    Consolas, monospace;

  /* Font Sizes (Fluid Scale) */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.25rem);
  --font-size-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3rem);

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* ===== SHADOW SYSTEM ===== */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

  /* ===== BORDER RADIUS SYSTEM ===== */
  --radius-none: 0;
  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* ===== ANIMATION SYSTEM ===== */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 750ms;

  /* Easing Functions */
  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* ===== Z-INDEX SYSTEM ===== */
  --z-hide: -1;
  --z-base: 0;
  --z-docked: 10;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-banner: 1030;
  --z-overlay: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* ===== DARK MODE SUPPORT (WCAG AA Compliant) ===== */
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Theme Backgrounds */
    --color-background: var(--color-neutral-950);
    --color-surface: var(--color-neutral-900);
    --color-surface-elevated: var(--color-neutral-800);
    --color-surface-subtle: var(--color-neutral-800);
    --color-surface-muted: var(--color-neutral-800);

    /* Dark Theme Borders */
    --color-border: var(--color-neutral-700);
    --color-border-subtle: var(--color-neutral-800);

    /* Dark Theme Text - High Contrast */
    --color-text-primary: var(--color-neutral-50);
    --color-text-secondary: var(--color-neutral-300);
    --color-text-muted: var(--color-neutral-400);
    --color-text-on-surface: var(--color-neutral-50);

    /* Dark Theme Status Colors */
    --color-success-bg: rgba(22, 101, 52, 0.2);
    --color-success-text: #4ade80;
    --color-success-border: rgba(34, 197, 94, 0.3);

    --color-warning-bg: rgba(146, 64, 14, 0.2);
    --color-warning-text: #fbbf24;
    --color-warning-border: rgba(251, 191, 36, 0.3);

    --color-danger-bg: rgba(153, 27, 27, 0.2);
    --color-danger-text: #f87171;
    --color-danger-border: rgba(248, 113, 113, 0.3);

    --color-info-bg: rgba(30, 64, 175, 0.2);
    --color-info-text: #60a5fa;
    --color-info-border: rgba(96, 165, 250, 0.3);

    /* Enhanced shadows for dark mode */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 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, 0.4),
      0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5),
      0 10px 10px -5px rgba(0, 0, 0, 0.3);
  }
}

/* ===== FORCED DARK MODE OVERRIDE ===== */
[data-theme="dark"] {
  /* Dark Theme Backgrounds */
  --color-background: var(--color-neutral-950);
  --color-surface: var(--color-neutral-900);
  --color-surface-elevated: var(--color-neutral-800);
  --color-surface-subtle: var(--color-neutral-800);
  --color-surface-muted: var(--color-neutral-800);

  /* Dark Theme Borders */
  --color-border: var(--color-neutral-700);
  --color-border-subtle: var(--color-neutral-800);

  /* Dark Theme Text - High Contrast */
  --color-text-primary: var(--color-neutral-50);
  --color-text-secondary: var(--color-neutral-300);
  --color-text-muted: var(--color-neutral-400);
  --color-text-on-surface: var(--color-neutral-50);

  /* Dark Theme Status Colors */
  --color-success-bg: rgba(22, 101, 52, 0.2);
  --color-success-text: #4ade80;
  --color-success-border: rgba(34, 197, 94, 0.3);

  --color-warning-bg: rgba(146, 64, 14, 0.2);
  --color-warning-text: #fbbf24;
  --color-warning-border: rgba(251, 191, 36, 0.3);

  --color-danger-bg: rgba(153, 27, 27, 0.2);
  --color-danger-text: #f87171;
  --color-danger-border: rgba(248, 113, 113, 0.3);

  --color-info-bg: rgba(30, 64, 175, 0.2);
  --color-info-text: #60a5fa;
  --color-info-border: rgba(96, 165, 250, 0.3);
}

/* ===== HIGH CONTRAST MODE SUPPORT ===== */
@media (prefers-contrast: high) {
  :root {
    /* Enhanced contrast ratios */
    --color-text-primary: #000000;
    --color-text-secondary: #1a1a1a;
    --color-background: #ffffff;
    --color-border: #000000;
    --shadow-sm: none;
    --shadow-md: 0 0 0 2px #000000;
    --shadow-lg: 0 0 0 3px #000000;
  }

  [data-theme="dark"] {
    --color-text-primary: #ffffff;
    --color-text-secondary: #f0f0f0;
    --color-background: #000000;
    --color-surface: #1a1a1a;
  }
}

/* ===== 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;
  }
}

/* ===== BASE STYLES WITH PROPER CONTRAST ===== */
* {
  box-sizing: border-box;
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -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-color: var(--color-background);
  margin: 0;
  padding: 0;
  transition: background-color var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out);
}

/* ===== ENHANCED INTERACTIVE COMPONENT SYSTEM ===== */

/* Enhanced Button System with Proper Contrast */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  min-height: 44px; /* Touch target */

  /* Ensure proper contrast */
  background-color: var(--color-surface);
  color: var(--color-text-on-surface);
  border-color: var(--color-border);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left var(--duration-slow) var(--ease-out);
}

.btn:hover::before {
  left: 100%;
}

.btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.btn:active {
  transform: translateY(1px);
}

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

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

.btn--secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-on-secondary);
  border-color: var(--color-secondary);
}

.btn--secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
}

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

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

/* Enhanced Card System with Proper Contrast */
.card {
  background-color: var(--color-surface);
  color: var(--color-text-on-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

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

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

.card--interactive {
  cursor: pointer;
}

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

/* Enhanced Input System with Proper Contrast */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background-color: var(--color-surface);
  color: var(--color-text-on-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  min-height: 44px; /* Touch target */
}

.input:focus {
  outline: none;
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.input:hover:not(:focus) {
  border-color: var(--color-border-interactive);
}

/* Enhanced Navigation Links with Proper Contrast */
.nav-link-enhanced {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  color: var(--color-text-secondary);
  min-height: 44px; /* Touch target */
}

.nav-link-enhanced::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-surface-subtle);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  z-index: -1;
}

.nav-link-enhanced:hover {
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.nav-link-enhanced:hover::before {
  opacity: 1;
}

/* ===== LOADING STATES WITH PROPER CONTRAST ===== */
.loading-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

.loading-skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-muted) 25%,
    var(--color-surface-subtle) 37%,
    var(--color-surface-muted) 63%
  );
  background-size: 400% 100%;
  animation: loading-skeleton 1.4s ease infinite;
}

@keyframes loading-skeleton {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: -100% 50%;
  }
}

/* ===== ACCESSIBILITY HELPERS ===== */
.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-visible-only {
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

*:focus-visible + .focus-visible-only {
  opacity: 1;
}

/* ===== UTILITY CLASSES WITH PROPER CONTRAST ===== */

/* Spacing Utilities */
.p-0 {
  padding: var(--space-0) !important;
}
.p-1 {
  padding: var(--space-1) !important;
}
.p-2 {
  padding: var(--space-2) !important;
}
.p-3 {
  padding: var(--space-3) !important;
}
.p-4 {
  padding: var(--space-4) !important;
}
.p-6 {
  padding: var(--space-6) !important;
}
.p-8 {
  padding: var(--space-8) !important;
}
.p-12 {
  padding: var(--space-12) !important;
}
.p-16 {
  padding: var(--space-16) !important;
}
.p-24 {
  padding: var(--space-24) !important;
}

.m-0 {
  margin: var(--space-0) !important;
}
.m-1 {
  margin: var(--space-1) !important;
}
.m-2 {
  margin: var(--space-2) !important;
}
.m-3 {
  margin: var(--space-3) !important;
}
.m-4 {
  margin: var(--space-4) !important;
}
.m-6 {
  margin: var(--space-6) !important;
}
.m-8 {
  margin: var(--space-8) !important;
}
.m-12 {
  margin: var(--space-12) !important;
}
.m-16 {
  margin: var(--space-16) !important;
}
.m-24 {
  margin: var(--space-24) !important;
}

/* Typography Utilities with Proper Contrast */
.text-xs {
  font-size: var(--font-size-xs);
}
.text-sm {
  font-size: var(--font-size-sm);
}
.text-base {
  font-size: var(--font-size-base);
}
.text-lg {
  font-size: var(--font-size-lg);
}
.text-xl {
  font-size: var(--font-size-xl);
}
.text-2xl {
  font-size: var(--font-size-2xl);
}
.text-3xl {
  font-size: var(--font-size-3xl);
}

.font-light {
  font-weight: var(--font-weight-light);
}
.font-normal {
  font-weight: var(--font-weight-normal);
}
.font-medium {
  font-weight: var(--font-weight-medium);
}
.font-semibold {
  font-weight: var(--font-weight-semibold);
}
.font-bold {
  font-weight: var(--font-weight-bold);
}

.text-primary {
  color: var(--color-text-primary) !important;
}
.text-secondary {
  color: var(--color-text-secondary) !important;
}
.text-muted {
  color: var(--color-text-muted) !important;
}

/* Layout Utilities */
.flex {
  display: flex;
}
.inline-flex {
  display: inline-flex;
}
.grid {
  display: grid;
}
.hidden {
  display: none;
}
.block {
  display: block;
}
.inline-block {
  display: inline-block;
}

.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-start {
  justify-content: flex-start;
}
.justify-end {
  justify-content: flex-end;
}

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

.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);
}
.gap-12 {
  gap: var(--space-12);
}
.gap-16 {
  gap: var(--space-16);
}

/* Border Radius Utilities */
.rounded-none {
  border-radius: var(--radius-none);
}
.rounded-sm {
  border-radius: var(--radius-sm);
}
.rounded-md {
  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);
}

/* Shadow Utilities */
.shadow-none {
  box-shadow: none;
}
.shadow-xs {
  box-shadow: var(--shadow-xs);
}
.shadow-sm {
  box-shadow: var(--shadow-sm);
}
.shadow-md {
  box-shadow: var(--shadow-md);
}
.shadow-lg {
  box-shadow: var(--shadow-lg);
}
.shadow-xl {
  box-shadow: var(--shadow-xl);
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (min-width: 640px) {
  .sm\:block {
    display: block;
  }
  .sm\:hidden {
    display: none;
  }
  .sm\:flex {
    display: flex;
  }
  .sm\:grid {
    display: grid;
  }
}

@media (min-width: 768px) {
  .md\:block {
    display: block;
  }
  .md\:hidden {
    display: none;
  }
  .md\:flex {
    display: flex;
  }
  .md\:grid {
    display: grid;
  }
}

@media (min-width: 1024px) {
  .lg\:block {
    display: block;
  }
  .lg\:hidden {
    display: none;
  }
  .lg\:flex {
    display: flex;
  }
  .lg\:grid {
    display: grid;
  }
}