/* ==================================
   VetCare Online - Main Styles
   Modern, responsive veterinary website
================================== */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #f59e0b;
  --accent-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f97316;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Breakpoints (for reference) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-700);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container {
    padding: 0 2rem;
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--gray-800);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
}

h2 {
  font-size: 1.875rem;
  font-weight: 600;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.25rem;
  }
  
  h3 {
    font-size: 1.75rem;
  }
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* Navigation */
.navbar {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-color);
}

.nav-logo i {
  font-size: 1.5rem;
  color: var(--accent-color);
}

.nav-menu {
  display: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--gray-700);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-link.btn-primary {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.nav-link.btn-primary:hover {
  background-color: var(--primary-hover);
  color: white;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle .bar {
  width: 24px;
  height: 3px;
  background-color: var(--gray-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
  
  .nav-toggle {
    display: none;
  }
  
  .nav-container {
    padding: 0 2rem;
  }
}

/* Mobile menu */
.nav-menu.active {
  display: flex;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: white;
  flex-direction: column;
  padding: var(--spacing-lg);
  border-top: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  gap: var(--spacing-md);
}

.nav-toggle.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23cbd5e0" stroke-width="0.5" opacity="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-container {
  display: grid;
  gap: var(--spacing-3xl);
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--gray-800);
  line-height: 1.1;
}

.hero-title .highlight {
  color: var(--primary-color);
  position: relative;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--radius-sm);
}

.hero-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.hero-features .feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
}

.hero-features .feature i {
  color: var(--accent-color);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-2xl);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-lg);
  max-width: 500px;
  margin: 0 auto;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  font-family: var(--font-heading);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 500;
}

.hero-image {
  position: relative;
  text-align: center;
}

.hero-image img {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  max-width: 100%;
  height: auto;
}

.floating-card {
  position: absolute;
  bottom: -20px;
  right: 20px;
  background-color: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.floating-card .card-icon {
  background-color: var(--accent-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-card .card-content {
  display: flex;
  flex-direction: column;
}

.floating-card .card-title {
  font-weight: 600;
  color: var(--gray-800);
  font-size: 0.875rem;
}

.floating-card .card-subtitle {
  font-size: 0.75rem;
  color: var(--gray-600);
}

@media (min-width: 768px) {
  .hero {
    padding: 10rem 0 6rem;
  }
  
  .hero-container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    text-align: left;
  }
  
  .hero-content {
    text-align: left;
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .hero-description {
    margin-left: 0;
    margin-right: 0;
  }
  
  .hero-features {
    justify-content: flex-start;
  }
  
  .hero-actions {
    flex-direction: row;
  }
  
  .hero-stats {
    margin: 0;
  }
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Services Section */
.services {
  padding: var(--spacing-3xl) 0;
  background-color: white;
}

.services-grid {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: 1fr;
}

.service-card {
  background-color: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  text-align: center;
}

.service-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.service-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.5rem;
}

.service-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--gray-800);
}

.service-card p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-lg);
}

.service-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.service-features li {
  padding: var(--spacing-xs) 0;
  color: var(--gray-600);
  font-size: 0.875rem;
}

.service-features li:before {
  content: '✓';
  color: var(--accent-color);
  margin-right: var(--spacing-sm);
  font-weight: bold;
}

.service-btn {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: background-color var(--transition-fast);
  display: inline-block;
}

.service-btn:hover {
  background-color: var(--primary-hover);
  color: white;
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.pricing-grid {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: 1fr;
}

.pricing-card {
  background-color: white;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  scale: 1.05;
}

.popular-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-lg);
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
}

.pricing-header {
  margin-bottom: var(--spacing-xl);
}

.pricing-header h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-xs);
}

.currency {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-700);
}

.amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-color);
  font-family: var(--font-heading);
}

.period {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
  text-align: left;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--gray-100);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li i {
  font-size: 0.875rem;
}

.pricing-features li i.fa-check {
  color: var(--accent-color);
}

.pricing-features li i.fa-times {
  color: var(--gray-300);
}

.pricing-btn {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: background-color var(--transition-fast);
  display: inline-block;
  width: 100%;
}

.pricing-btn:hover {
  background-color: var(--primary-hover);
  color: white;
}

.pricing-card.featured .pricing-btn {
  background-color: var(--accent-color);
}

.pricing-card.featured .pricing-btn:hover {
  background-color: #059669;
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .pricing-card.featured {
    scale: 1.02;
  }
}

/* How It Works Section */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background-color: white;
}

.steps-grid {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: 1fr;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  z-index: 1;
}

.step-icon {
  background-color: var(--gray-50);
  color: var(--primary-color);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.75rem;
  border: 3px solid var(--gray-200);
  transition: all var(--transition-normal);
}

.step:hover .step-icon {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  color: white;
}

.step h3 {
  margin-bottom: var(--spacing-md);
  color: var(--gray-800);
}

.step p {
  color: var(--gray-600);
  max-width: 300px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .steps-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .step::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -50px;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    z-index: 0;
  }
  
  .step:last-child::after {
    display: none;
  }
}

/* About Section */
.about {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.about-content {
  display: grid;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-text h2 {
  margin-bottom: var(--spacing-lg);
}

.about-text p {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.feature-item {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.feature-item i {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-top: var(--spacing-xs);
  flex-shrink: 0;
}

.feature-item h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--gray-800);
}

.feature-item p {
  color: var(--gray-600);
  margin-bottom: 0;
}

.about-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
  .about-content {
    grid-template-columns: 1fr 1fr;
  }
}

/* Footer */
.footer {
  background-color: var(--gray-800);
  color: var(--gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: 1fr;
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-lg);
  font-size: 1.125rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer-logo i {
  font-size: 1.5rem;
  color: var(--accent-color);
}

.footer-section p {
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: var(--gray-300);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: white;
}

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

.social-links a {
  background-color: var(--gray-700);
  color: var(--gray-300);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--primary-color);
  color: white;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.contact-item i {
  color: var(--accent-color);
  width: 20px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-content {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
  
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* Responsive utilities */
@media (max-width: 767px) {
  .hide-mobile {
    display: none;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none;
  }
}

/* Loading animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

/* Focus states for accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

button:focus,
a:focus {
  outline-color: var(--primary-color);
}

/* Smooth transitions for interactive elements */
button,
.btn,
.service-card,
.pricing-card,
.step-icon,
.nav-link {
  transition: all var(--transition-normal);
}

/* Print styles */
@media print {
  .navbar,
  .footer,
  .hero-actions {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}