/* RV CareTrack - Global Styles
   Premium Design System
   ======================= */

/* CSS Variables */
:root {
  /* RV Adventure Color Palette */
  --primary-orange: #E67E22;
  --primary-orange-dark: #D35400;
  --primary-orange-light: #F39C12;
  --primary-green: #27AE60;
  --primary-green-dark: #229954;
  --primary-green-light: #2ECC71;
  --primary-blue: #3498DB;
  --primary-blue-dark: #2E86C1;
  --primary-blue-light: #5DADE2;
  
  /* Secondary Colors */
  --desert-sand: #D4A574;
  --desert-sand-light: #C9A567;
  --slate-gray: #5D6D7E;
  --slate-gray-light: #566573;
  --cream: #F5F5DC;
  --cream-light: #FAF0E6;
  
  /* Status Colors */
  --success-green: #27AE60;
  --success-dark: #229954;
  --danger-red: #E74C3C;
  --warning-yellow: #F39C12;
  
  /* Neutral Grays */
  --neutral-50: #FAF0E6;
  --neutral-100: #F5F5DC;
  --neutral-200: #E8E8E8;
  --neutral-300: #D4D4D4;
  --neutral-400: #A3A3A3;
  --neutral-500: #737373;
  --neutral-600: #566573;
  --neutral-700: #404040;
  --neutral-800: #2C3E50;
  --neutral-900: #1B2631;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Container */
  --container-max: 1280px;
  --container-padding: var(--space-lg);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--neutral-800);
  background-color: #ffffff;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-900);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.015em;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-md);
  color: var(--neutral-700);
  line-height: 1.7;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--neutral-600);
  font-weight: 400;
}

/* Links */
a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--primary-dark);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary-orange);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(230, 126, 34, 0.25);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-orange-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(230, 126, 34, 0.35);
}

.btn-secondary {
  background-color: white;
  color: var(--primary-orange);
  border-color: var(--neutral-200);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--neutral-50);
  border-color: var(--primary-orange);
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: 1.125rem;
}

.btn-small {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.875rem;
}

/* Navigation Header */
.nav-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--neutral-100);
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neutral-900);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-logo svg {
  width: 32px;
  height: 32px;
  color: var(--primary-orange);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  color: var(--neutral-700);
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-orange);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--primary-orange);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-lg);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
  color: var(--neutral-700);
}

/* Footer */
.footer {
  background-color: var(--neutral-900);
  color: var(--neutral-300);
  padding: var(--space-4xl) 0 var(--space-2xl);
  margin-top: var(--space-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-column h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--neutral-400);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid var(--neutral-800);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--neutral-800);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.social-link:hover {
  background-color: var(--primary-blue);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
  color: white;
}

/* Sections */
.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--neutral-600);
  max-width: 700px;
  margin: 0 auto;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--neutral-700);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  background-color: white;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-orange);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

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

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.animate-fadeIn {
  animation: fadeIn 0.6s ease forwards;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease forwards;
}

.animate-slideInRight {
  animation: slideInRight 0.6s ease forwards;
}

.animate-scaleIn {
  animation: scaleIn 0.5s ease forwards;
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }
.gap-5 { gap: var(--space-xl); }

/* Responsive */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-md);
  }
  
  .nav-menu {
    display: none;
  }
  
  .nav-cta {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .section {
    padding: var(--space-3xl) 0;
  }
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--neutral-200);
  border-radius: 50%;
  border-top-color: var(--primary-orange);
  animation: spin 1s ease-in-out infinite;
}

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

/* 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-width: 0;
}

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--primary-orange);
  outline-offset: 2px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--neutral-400);
  border-radius: var(--radius-full);
}

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