/**
 * Billboard Booking System - Foundation Styles
 * Base resets, typography, and utility classes
 *
 * This file contains:
 * - Design System Variables (CSS Custom Properties)
 * - Modern CSS Reset
 * - WordPress Theme Isolation
 * - Base Typography
 * - Utility Classes
 * - Accessibility Helpers
 *
 * @package Billboard_Booking_System
 * @version 2.0.1
 * @author adUp
 */

/* ==========================================================================
   DESIGN SYSTEM VARIABLES (CSS CUSTOM PROPERTIES)
   ========================================================================== */

:root {
  /* ===== COLOR PALETTE ===== */
  /* Base Colors */
  --billboard-white: #ffffff;
  --billboard-black: #000000;

  /* Gray Scale (Standard) */
  --billboard-gray-50: #f9fafb;
  --billboard-gray-100: #f3f4f6;
  --billboard-gray-200: #e5e7eb;
  --billboard-gray-300: #d1d5db;
  --billboard-gray-400: #9ca3af;
  --billboard-gray-500: #6b7280;
  --billboard-gray-600: #4b5563;
  --billboard-gray-700: #374151;
  --billboard-gray-800: #1f2937;
  --billboard-gray-900: #111827;

  /* Primary Color (Red) */
  --billboard-primary: #ef4444;
  --billboard-primary-light: #fca5a5;
  --billboard-primary-dark: #dc2626;
  --billboard-primary-hover: #dc2626;

  /* Semantic Colors */
  --billboard-success: #22c55e;
  --billboard-success-light: #86efac;
  --billboard-success-dark: #16a34a;
  --billboard-error: #ef4444;
  --billboard-error-light: #fca5a5;
  --billboard-error-dark: #dc2626;
  --billboard-warning: #f59e0b;
  --billboard-warning-light: #fcd34d;
  --billboard-warning-dark: #d97706;
  --billboard-info: #3b82f6;
  --billboard-info-light: #93c5fd;
  --billboard-info-dark: #2563eb;

  /* ===== TYPOGRAPHY ===== */
  /* Font Family */
  --billboard-font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  /* Font Sizes */
  --billboard-text-xs: 0.75rem;
  /* 12px */
  --billboard-text-sm: 0.875rem;
  /* 14px */
  --billboard-text-base: 1rem;
  /* 16px */
  --billboard-text-lg: 1.125rem;
  /* 18px */
  --billboard-text-xl: 1.25rem;
  /* 20px */
  --billboard-text-2xl: 1.5rem;
  /* 24px */
  --billboard-text-3xl: 1.875rem;
  /* 30px */
  --billboard-text-4xl: 2.25rem;
  /* 36px */
  --billboard-text-5xl: 3rem;
  /* 48px */

  /* Font Weights */
  --billboard-font-thin: 100;
  --billboard-font-light: 300;
  --billboard-font-normal: 400;
  --billboard-font-medium: 500;
  --billboard-font-semibold: 600;
  --billboard-font-bold: 700;
  --billboard-font-extrabold: 800;

  /* Line Heights */
  --billboard-leading-none: 1;
  --billboard-leading-tight: 1.25;
  --billboard-leading-snug: 1.375;
  --billboard-leading-normal: 1.5;
  --billboard-leading-relaxed: 1.625;
  --billboard-leading-loose: 2;

  /* ===== SPACING ===== */
  --billboard-space-1: 0.25rem;
  /* 4px */
  --billboard-space-2: 0.5rem;
  /* 8px */
  --billboard-space-3: 0.75rem;
  /* 12px */
  --billboard-space-4: 1rem;
  /* 16px */
  --billboard-space-5: 1.25rem;
  /* 20px */
  --billboard-space-6: 1.5rem;
  /* 24px */
  --billboard-space-8: 2rem;
  /* 32px */
  --billboard-space-10: 2.5rem;
  /* 40px */
  --billboard-space-12: 3rem;
  /* 48px */
  --billboard-space-16: 4rem;
  /* 64px */
  --billboard-space-20: 5rem;
  /* 80px */
  --billboard-space-24: 6rem;
  /* 96px */

  /* Semantic Spacing */
  --billboard-space-xs: 0.25rem;
  --billboard-space-sm: 0.5rem;
  --billboard-space-md: 1rem;
  --billboard-space-lg: 1.5rem;
  --billboard-space-xl: 2rem;
  --billboard-space-2xl: 3rem;
  --billboard-section-gap: 2rem;

  /* ===== BORDER RADIUS ===== */
  --billboard-radius-none: 0;
  --billboard-radius-sm: 2px;
  /* Reduced from 4px */
  --billboard-radius-md: 4px;
  /* Reduced from 8px */
  --billboard-radius-lg: 6px;
  /* Reduced from 12px */
  --billboard-radius-xl: 8px;
  /* Reduced from 16px */
  --billboard-radius-2xl: 12px;
  /* Reduced from 24px */
  --billboard-radius-full: 9999px;
  --billboard-radius-card: 6px;
  /* Sharp, professional card radius */

  /* ===== SHADOWS ===== */
  --billboard-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --billboard-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --billboard-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --billboard-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.05), 0 8px 10px -6px rgb(0 0 0 / 0.05);
  --billboard-shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.15);
  --billboard-shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.05), 0 1px 2px -1px rgb(0 0 0 / 0.05);
  --billboard-shadow-card-hover: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);

  /* Elevation Shadows (semantic) */
  --billboard-elevation-sm: 0 1px 3px rgb(0 0 0 / 0.1);
  --billboard-elevation-md: 0 4px 12px rgb(0 0 0 / 0.1);
  --billboard-elevation-lg: 0 8px 24px rgb(0 0 0 / 0.12);

  /* ===== ANIMATION ===== */
  --billboard-duration-fast: 150ms;
  --billboard-duration-normal: 200ms;
  --billboard-duration-slow: 300ms;
  --billboard-easing-ease-out: cubic-bezier(0.4, 0, 0.2, 1);
  --billboard-easing-ease-in: cubic-bezier(0.4, 0, 1, 1);
  --billboard-easing-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== Z-INDEX SCALE ===== */
  --billboard-z-dropdown: 1000;
  --billboard-z-sticky: 1020;
  --billboard-z-fixed: 1030;
  --billboard-z-modal-backdrop: 1040;
  --billboard-z-modal: 1050;
  --billboard-z-popover: 1060;
  --billboard-z-tooltip: 1070;

  /* ===== ADDITIONAL MISSING VARIABLES ===== */
  /* Accent Color (purple) */
  --billboard-accent: #7c3aed;
  --billboard-accent-light: #a78bfa;
  --billboard-accent-dark: #6d28d9;

  /* Primary Color Alpha Variants */
  --billboard-primary-alpha-5: rgba(239, 68, 68, 0.05);
  --billboard-primary-alpha-10: rgba(239, 68, 68, 0.1);
  --billboard-primary-alpha-15: rgba(239, 68, 68, 0.15);
  --billboard-primary-alpha-20: rgba(239, 68, 68, 0.2);
  --billboard-primary-alpha-88: rgba(239, 68, 68, 0.88);

  /* Additional Spacing */
  --billboard-space-2-5: 0.625rem;
  /* 10px */

  /* Additional Font Weights */
  --billboard-font-black: 900;

  /* Font Mono */
  --billboard-font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ==========================================================================
   MODERN CSS RESET & BOX-SIZING
   ========================================================================== */

/* Box-sizing for all elements within booking container */
.billboard-booking-container,
.billboard-booking-container *,
.billboard-booking-container *::before,
.billboard-booking-container *::after {
  box-sizing: border-box !important;
}

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

.billboard-header {
  text-align: center;
  background: var(--billboard-white);
  border-bottom: 1px solid var(--billboard-gray-200);
  padding: var(--billboard-space-xl) var(--billboard-space-lg);
  margin-bottom: var(--billboard-section-gap);
}

.billboard-header-content {
  max-width: 800px;
  margin: 0 auto;
}

.billboard-heading-1 {
  font-size: var(--billboard-text-3xl);
  font-weight: var(--billboard-font-bold);
  line-height: var(--billboard-leading-tight);
  color: var(--billboard-primary);
  margin-bottom: var(--billboard-space-sm);
}

/* ==========================================================================
   PROGRESS STEPPER COMPONENT
   Based on new_design_json.md lines 278-328
   ========================================================================== */

.billboard-progress-tracker {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  padding: var(--billboard-space-lg);
  /* 24px */
  background: var(--billboard-white);
  margin-bottom: var(--billboard-section-gap);
  /* 32px */
}

.billboard-progress-container {
  display: flex;
  align-items: center;
  gap: 0;
}

.billboard-progress-line {
  position: relative;
  width: 60px;
  height: 2px;
  background: var(--billboard-gray-300);
}

.billboard-progress-line-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--billboard-primary);
  transition: width var(--billboard-duration-normal) var(--billboard-easing-ease-out);
}

.billboard-steps-wrapper {
  display: flex;
  align-items: center;
  gap: 0;
}

.billboard-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--billboard-space-sm);
  /* 8px */
}

.billboard-step-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--billboard-text-lg);
  /* 16px */
  font-weight: var(--billboard-font-semibold);
  /* 600 */
  transition: all var(--billboard-duration-normal) var(--billboard-easing-ease-out);
}

.billboard-step.active .billboard-step-circle {
  background: var(--billboard-primary);
  color: var(--billboard-white);
}

.billboard-step.completed .billboard-step-circle {
  background: var(--billboard-primary);
  color: var(--billboard-white);
}

.billboard-step.upcoming .billboard-step-circle {
  background: var(--billboard-gray-200);
  color: var(--billboard-gray-500);
}

.billboard-step-label {
  font-size: var(--billboard-text-base);
  /* 14px */
  font-weight: var(--billboard-font-normal);
  color: var(--billboard-gray-700);
  text-align: center;
  margin-top: var(--billboard-space-sm);
  /* 8px */
}

.billboard-step-description {
  font-size: var(--billboard-text-xs);
  /* 10px */
  color: var(--billboard-gray-500);
  text-align: center;
}

.billboard-booking-container {
  /* Container Properties */
  display: block !important;
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto !important;
  padding: var(--billboard-space-lg) !important;

  /* Apply Design System Foundation */
  font-family: var(--billboard-font-family) !important;
  font-size: var(--billboard-text-base) !important;
  line-height: var(--billboard-leading-loose) !important;
  color: var(--billboard-gray-900) !important;
  background: var(--billboard-gray-100) !important;

  /* Modern Text Rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;

  /* Container Styling */
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
}

/* Reset Typography for WordPress Theme Conflicts */
.billboard-booking-container h1,
.billboard-booking-container h2,
.billboard-booking-container h3,
.billboard-booking-container h4,
.billboard-booking-container h5,
.billboard-booking-container h6 {
  font-family: var(--billboard-font-family) !important;
  margin: 0 !important;
  padding: 0 !important;
  text-transform: none !important;
  letter-spacing: normal !important;
  text-shadow: none !important;
  font-weight: inherit;
}

.billboard-booking-container p {
  font-family: var(--billboard-font-family) !important;
  margin: 0 !important;
  padding: 0 !important;
  line-height: var(--billboard-leading-normal);
}

/* Reset for non-billboard elements */
.billboard-booking-container span:not([class*="billboard-"]),
.billboard-booking-container div:not([class*="billboard-"]),
.billboard-booking-container label:not([class*="billboard-"]) {
  font-family: var(--billboard-font-family) !important;
  text-transform: none !important;
  letter-spacing: normal !important;
  text-shadow: none !important;
}

/* Form elements reset */
.billboard-booking-container input:not([class*="billboard-"]),
.billboard-booking-container button:not([class*="billboard-"]),
.billboard-booking-container select:not([class*="billboard-"]),
.billboard-booking-container textarea:not([class*="billboard-"]) {
  font-family: var(--billboard-font-family) !important;
}

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

/* Heading Hierarchy */
.billboard-booking-container h1,
.billboard-booking-title {
  font-size: var(--billboard-text-3xl);
  font-weight: var(--billboard-font-bold);
  line-height: var(--billboard-leading-tight);
  color: var(--billboard-gray-900);
}

.billboard-booking-container h2,
.billboard-step-title {
  font-size: var(--billboard-text-2xl);
  font-weight: var(--billboard-font-bold);
  line-height: var(--billboard-leading-tight);
  color: var(--billboard-gray-900);
}

.billboard-booking-container h3 {
  font-size: var(--billboard-text-xl);
  font-weight: var(--billboard-font-semibold);
  line-height: var(--billboard-leading-tight);
  color: var(--billboard-gray-800);
}

.billboard-booking-container h4 {
  font-size: var(--billboard-text-lg);
  font-weight: var(--billboard-font-semibold);
  line-height: var(--billboard-leading-normal);
  color: var(--billboard-gray-800);
}

.billboard-booking-container h5 {
  font-size: var(--billboard-text-base);
  font-weight: var(--billboard-font-medium);
  line-height: var(--billboard-leading-normal);
  color: var(--billboard-gray-700);
}

.billboard-booking-container h6 {
  font-size: var(--billboard-text-sm);
  font-weight: var(--billboard-font-medium);
  line-height: var(--billboard-leading-normal);
  color: var(--billboard-gray-700);
}

/* Body Text */
.billboard-booking-container p {
  font-size: var(--billboard-text-base);
  line-height: var(--billboard-leading-normal);
  color: var(--billboard-gray-600);
}

/* Small Text */
.billboard-booking-container small {
  font-size: var(--billboard-text-sm);
  line-height: var(--billboard-leading-normal);
  color: var(--billboard-gray-500);
}

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

/* Display Utilities */
.billboard-hidden {
  display: none !important;
}

.billboard-visible {
  display: block !important;
}

.billboard-flex {
  display: flex !important;
}

.billboard-grid {
  display: grid !important;
}

.billboard-inline-flex {
  display: inline-flex !important;
}

/* Text Alignment */
.billboard-text-left {
  text-align: left !important;
}

.billboard-text-center {
  text-align: center !important;
}

.billboard-text-right {
  text-align: right !important;
}

/* Text Colors */
.billboard-text-primary {
  color: var(--billboard-gray-900) !important;
}

.billboard-text-secondary {
  color: var(--billboard-gray-600) !important;
}

.billboard-text-muted {
  color: var(--billboard-gray-500) !important;
}

.billboard-text-success {
  color: var(--billboard-success) !important;
}

.billboard-text-error {
  color: var(--billboard-error) !important;
}

.billboard-text-warning {
  color: var(--billboard-warning) !important;
}

.billboard-text-info {
  color: var(--billboard-info) !important;
}

/* Background Colors */
.billboard-bg-white {
  background-color: var(--billboard-white) !important;
}

.billboard-bg-gray-50 {
  background-color: var(--billboard-gray-50) !important;
}

.billboard-bg-gray-100 {
  background-color: var(--billboard-gray-100) !important;
}

.billboard-bg-primary {
  background-color: var(--billboard-primary) !important;
  color: var(--billboard-white) !important;
}

.billboard-bg-success {
  background-color: var(--billboard-success) !important;
  color: var(--billboard-white) !important;
}

.billboard-bg-error {
  background-color: var(--billboard-error) !important;
  color: var(--billboard-white) !important;
}

/* Spacing Utilities - Margin */
.billboard-m-0 {
  margin: 0 !important;
}

.billboard-m-1 {
  margin: var(--billboard-space-1) !important;
}

.billboard-m-2 {
  margin: var(--billboard-space-2) !important;
}

.billboard-m-3 {
  margin: var(--billboard-space-3) !important;
}

.billboard-m-4 {
  margin: var(--billboard-space-4) !important;
}

.billboard-m-6 {
  margin: var(--billboard-space-6) !important;
}

.billboard-m-8 {
  margin: var(--billboard-space-8) !important;
}

/* Margin Top */
.billboard-mt-0 {
  margin-top: 0 !important;
}

.billboard-mt-2 {
  margin-top: var(--billboard-space-2) !important;
}

.billboard-mt-4 {
  margin-top: var(--billboard-space-4) !important;
}

.billboard-mt-6 {
  margin-top: var(--billboard-space-6) !important;
}

.billboard-mt-8 {
  margin-top: var(--billboard-space-8) !important;
}

/* Margin Bottom */
.billboard-mb-0 {
  margin-bottom: 0 !important;
}

.billboard-mb-2 {
  margin-bottom: var(--billboard-space-2) !important;
}

.billboard-mb-4 {
  margin-bottom: var(--billboard-space-4) !important;
}

.billboard-mb-6 {
  margin-bottom: var(--billboard-space-6) !important;
}

.billboard-mb-8 {
  margin-bottom: var(--billboard-space-8) !important;
}

/* Margin Left */
.billboard-ml-0 {
  margin-left: 0 !important;
}

.billboard-ml-2 {
  margin-left: var(--billboard-space-2) !important;
}

.billboard-ml-4 {
  margin-left: var(--billboard-space-4) !important;
}

.billboard-ml-auto {
  margin-left: auto !important;
}

/* Margin Right */
.billboard-mr-0 {
  margin-right: 0 !important;
}

.billboard-mr-2 {
  margin-right: var(--billboard-space-2) !important;
}

.billboard-mr-4 {
  margin-right: var(--billboard-space-4) !important;
}

.billboard-mr-auto {
  margin-right: auto !important;
}

/* Spacing Utilities - Padding */
.billboard-p-0 {
  padding: 0 !important;
}

.billboard-p-1 {
  padding: var(--billboard-space-1) !important;
}

.billboard-p-2 {
  padding: var(--billboard-space-2) !important;
}

.billboard-p-3 {
  padding: var(--billboard-space-3) !important;
}

.billboard-p-4 {
  padding: var(--billboard-space-4) !important;
}

.billboard-p-6 {
  padding: var(--billboard-space-6) !important;
}

.billboard-p-8 {
  padding: var(--billboard-space-8) !important;
}

/* Padding Top */
.billboard-pt-0 {
  padding-top: 0 !important;
}

.billboard-pt-2 {
  padding-top: var(--billboard-space-2) !important;
}

.billboard-pt-4 {
  padding-top: var(--billboard-space-4) !important;
}

.billboard-pt-6 {
  padding-top: var(--billboard-space-6) !important;
}

/* Padding Bottom */
.billboard-pb-0 {
  padding-bottom: 0 !important;
}

.billboard-pb-2 {
  padding-bottom: var(--billboard-space-2) !important;
}

.billboard-pb-4 {
  padding-bottom: var(--billboard-space-4) !important;
}

.billboard-pb-6 {
  padding-bottom: var(--billboard-space-6) !important;
}

/* Padding Left/Right */
.billboard-px-0 {
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.billboard-px-2 {
  padding-left: var(--billboard-space-2) !important;
  padding-right: var(--billboard-space-2) !important;
}

.billboard-px-4 {
  padding-left: var(--billboard-space-4) !important;
  padding-right: var(--billboard-space-4) !important;
}

.billboard-px-6 {
  padding-left: var(--billboard-space-6) !important;
  padding-right: var(--billboard-space-6) !important;
}

/* Padding Top/Bottom */
.billboard-py-0 {
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

.billboard-py-2 {
  padding-top: var(--billboard-space-2) !important;
  padding-bottom: var(--billboard-space-2) !important;
}

.billboard-py-4 {
  padding-top: var(--billboard-space-4) !important;
  padding-bottom: var(--billboard-space-4) !important;
}

.billboard-py-6 {
  padding-top: var(--billboard-space-6) !important;
  padding-bottom: var(--billboard-space-6) !important;
}

/* Width Utilities */
.billboard-w-full {
  width: 100% !important;
}

.billboard-w-auto {
  width: auto !important;
}

/* Max Width Utilities */
.billboard-max-w-xs {
  max-width: 320px !important;
}

.billboard-max-w-sm {
  max-width: 480px !important;
}

.billboard-max-w-md {
  max-width: 640px !important;
}

.billboard-max-w-lg {
  max-width: 800px !important;
}

.billboard-max-w-xl {
  max-width: 1024px !important;
}

.billboard-max-w-full {
  max-width: 100% !important;
}

/* Border Radius Utilities */
.billboard-rounded-none {
  border-radius: var(--billboard-radius-none) !important;
}

.billboard-rounded-sm {
  border-radius: var(--billboard-radius-sm) !important;
}

.billboard-rounded-md {
  border-radius: var(--billboard-radius-md) !important;
}

.billboard-rounded-lg {
  border-radius: var(--billboard-radius-lg) !important;
}

.billboard-rounded-xl {
  border-radius: var(--billboard-radius-xl) !important;
}

.billboard-rounded-full {
  border-radius: var(--billboard-radius-full) !important;
}

/* Shadow Utilities */
.billboard-shadow-none {
  box-shadow: none !important;
}

.billboard-shadow-sm {
  box-shadow: var(--billboard-shadow-sm) !important;
}

.billboard-shadow-md {
  box-shadow: var(--billboard-shadow-md) !important;
}

.billboard-shadow-lg {
  box-shadow: var(--billboard-shadow-lg) !important;
}

.billboard-shadow-xl {
  box-shadow: var(--billboard-shadow-xl) !important;
}

/* Opacity Utilities */
.billboard-opacity-0 {
  opacity: 0 !important;
}

.billboard-opacity-25 {
  opacity: 0.25 !important;
}

.billboard-opacity-50 {
  opacity: 0.5 !important;
}

.billboard-opacity-75 {
  opacity: 0.75 !important;
}

.billboard-opacity-100 {
  opacity: 1 !important;
}

/* Pointer Events */
.billboard-pointer-events-none {
  pointer-events: none !important;
}

.billboard-pointer-events-auto {
  pointer-events: auto !important;
}

/* Cursor Utilities */
.billboard-cursor-pointer {
  cursor: pointer !important;
}

.billboard-cursor-not-allowed {
  cursor: not-allowed !important;
}

.billboard-cursor-default {
  cursor: default !important;
}

/* ==========================================================================
   ACCESSIBILITY HELPERS
   ========================================================================== */

/* Screen Reader Only - Visually hidden but accessible to screen readers */
.billboard-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Screen Reader Only - Focusable version */
.billboard-sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
}

/* Skip Link - Accessibility navigation */
.billboard-skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--billboard-primary);
  color: var(--billboard-white);
  padding: var(--billboard-space-3) var(--billboard-space-4);
  text-decoration: none;
  border-radius: var(--billboard-radius-md);
  z-index: var(--billboard-z-tooltip);
}

.billboard-skip-link:focus {
  top: var(--billboard-space-4);
}

/* ==========================================================================
   FOCUS INDICATORS (WCAG 2.1 AA Compliant)
   ========================================================================== */

/* Global focus styles for all interactive elements */
.billboard-booking-container *:focus {
  outline: 2px solid var(--billboard-primary) !important;
  outline-offset: 2px !important;
}

/* Exception: Form inputs use ring style instead */
.billboard-booking-container input:focus,
.billboard-booking-container textarea:focus,
.billboard-booking-container select:focus {
  outline: none !important;
  /* Ring-style focus handled in components.css */
}

/* ==========================================================================
   RESPONSIVE CONTAINER ADJUSTMENTS
   ========================================================================== */

/* Mobile Adjustments */
@media (max-width: 768px) {
  .billboard-booking-container {
    padding: var(--billboard-space-4) !important;
    border-radius: var(--billboard-radius-lg) !important;
  }
}

/* Very Small Mobile */
@media (max-width: 480px) {
  .billboard-booking-container {
    padding: var(--billboard-space-2) !important;
    border-radius: var(--billboard-radius-md) !important;
  }
}

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

@media print {
  .billboard-booking-container {
    box-shadow: none !important;
    border: 1px solid var(--billboard-gray-300) !important;
    padding: var(--billboard-space-4) !important;
  }

  /* Hide interactive elements when printing */
  .billboard-btn,
  .billboard-navigation,
  .billboard-progress-tracker {
    display: none !important;
  }

  /* Ensure all content is visible for printing */
  .billboard-step-container {
    display: block !important;
    page-break-inside: avoid;
  }
}

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

.billboard-loading {
  opacity: 0.6;
  pointer-events: none;
  cursor: wait;
}

/* ==========================================================================
   DISABLED STATES
   ========================================================================== */

.billboard-disabled,
[disabled],
.billboard-booking-container [disabled] {
  opacity: 0.5 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
}

/* ==========================================================================
   CLEARFIX UTILITY
   ========================================================================== */

.billboard-clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* ==========================================================================
   TRUNCATE TEXT UTILITY
   ========================================================================== */

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

/* Multi-line truncation */
.billboard-line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.billboard-line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   SERVICE DETAILS LIGHTBOX & INFO BUTTON
   ========================================================================== */

/* Service info button overlay */
.billboard-service-image-wrapper {
  position: relative;
  overflow: hidden;
}

.billboard-service-info-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.95);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 10;
}

.billboard-service-card:hover .billboard-service-info-btn {
  opacity: 1;
  transform: scale(1);
}

.billboard-service-info-btn:hover {
  background: var(--billboard-primary, #7C3AED);
  color: white;
  transform: scale(1.1);
}

.billboard-service-info-btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

/* Base lightbox styles */
.billboard-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.billboard-lightbox-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
}

.billboard-lightbox-content {
  position: relative;
  background: white;
  border-radius: var(--billboard-radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  z-index: 10;
}

.billboard-lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  background: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  z-index: 11;
}

.billboard-lightbox-close:hover {
  background: var(--billboard-gray-100);
  transform: scale(1.1);
}

.billboard-lightbox-header {
  padding: var(--billboard-space-lg);
  border-bottom: 1px solid var(--billboard-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.billboard-lightbox-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--billboard-gray-900);
  margin: 0;
}

.billboard-lightbox-body {
  padding: var(--billboard-space-lg);
}

.billboard-lightbox-actions {
  padding: var(--billboard-space-lg);
  border-top: 1px solid var(--billboard-gray-200);
  display: flex;
  gap: var(--billboard-space-md);
  justify-content: flex-end;
}

/* Service details lightbox */
.billboard-lightbox-service-details {
  max-width: 900px;
  width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.billboard-service-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--billboard-space-lg);
  margin-bottom: var(--billboard-space-lg);
}

.billboard-service-main-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--billboard-radius-lg);
}

.billboard-service-info {
  display: flex;
  flex-direction: column;
  gap: var(--billboard-space-md);
}

.billboard-service-meta {
  display: flex;
  gap: var(--billboard-space-lg);
  margin-bottom: var(--billboard-space-md);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 12px;
  color: var(--billboard-gray-600);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.meta-value {
  font-size: 14px;
  color: var(--billboard-gray-900);
  font-weight: 500;
}

.billboard-service-description-full h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--billboard-space-sm);
  color: var(--billboard-gray-900);
}

.billboard-service-description-full p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--billboard-gray-700);
}

.billboard-service-features h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--billboard-space-sm);
  color: var(--billboard-gray-900);
}

.features-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.features-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--billboard-gray-700);
  line-height: 1.5;
}

.features-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--billboard-primary, #7C3AED);
  font-weight: bold;
}

.billboard-service-gallery-section {
  margin-top: var(--billboard-space-lg);
}

.billboard-service-gallery-section h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--billboard-space-md);
  color: var(--billboard-gray-900);
}

.billboard-service-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--billboard-space-sm);
}

.gallery-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--billboard-radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.05);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.billboard-service-price-tag {
  background: var(--billboard-primary, #7C3AED);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 14px;
  display: inline-block;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .billboard-service-details-grid {
    grid-template-columns: 1fr;
    gap: var(--billboard-space-md);
  }

  .billboard-service-meta {
    flex-direction: column;
    gap: var(--billboard-space-md);
  }

  .billboard-service-gallery {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }

  .billboard-lightbox-service-details {
    width: 95vw;
    max-height: 95vh;
  }
}

/* ==========================================================================
   END OF FOUNDATION STYLES
   ========================================================================== */