/* DentaCare Modern Website - Pure CSS Framework */

@import url("https://fonts.googleapis.com/css?family=Inter:wght@300;400;500;600;700&display=swap");

/* CSS Variables for Easy Theming */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --text-dark: #1f2937;
  --text-medium: #374151;
  --text-light: #4b5563;
  --text-white: #ffffff;
  --bg-white: #ffffff;
  --bg-light: #f9fafb;
  --bg-gray: #f3f4f6;
  --bg-page: #e9edf5;
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: all 0.15s ease;
  --transition-normal: all 0.3s ease;
  --transition-slow: all 0.5s ease;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

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

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

bigger {
  font-size: 130%;
}

/* Layout Components */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-sm { padding: var(--spacing-lg) 0; }
.section-lg { padding: var(--spacing-2xl) var(--spacing-md); }

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive Grid */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--spacing-sm); }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Header and Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}


.logo {
  display: block;
  transition: var(--transition-normal);
  object-fit: contain;
}

.logo img {
  height: 48px;
  width: auto;
  display: block;
}

.logo:hover {
  transform: scale(1.03);
}

.nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  font-size: 0.95rem;
  white-space: nowrap;
  position: relative;
  transition: var(--transition-fast);
}

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

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

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  margin: 2px 0;
  transition: var(--transition-normal);
  border-radius: var(--radius-sm);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: clamp(520px, 80vh, 760px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-white);
  overflow: hidden;
  padding: clamp(6rem, 12vw, 8rem) 0 var(--spacing-2xl);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  pointer-events: none;
  z-index: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.82) saturate(0.95);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: min(720px, 92vw);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.hero-title {
  font-size: clamp(2.25rem, 5.6vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 0;
  color: #FFFFFF;
  text-shadow: 0 18px 38px rgba(0, 0, 0, 0.45);
  animation: fadeInUp 0.9s ease both;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2.6vw, 1.375rem);
  margin: 0;
  color: #FFFFFF;
  line-height: 1.6;
  text-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
  animation: fadeInUp 0.9s ease 0.15s both;
}

.hero--compact {
  min-height: clamp(420px, 70vh, 600px);
  padding: clamp(4.5rem, 10vw, 6rem) 0 var(--spacing-xl);
}

/* Stats Section */
.hero-stats {
  width: 100%;
  display: flex;
  justify-content: center;
  flex-wrap: nowrap;
  gap: clamp(0.8rem, 1.5vw, 1.2rem);
  margin: 0;
  animation: fadeInUp 0.9s ease 0.3s both;
}

.stat-item {
  text-align: center;
  padding: clamp(0.8rem, 1.5vw, 1.2rem) clamp(0.8rem, 1.5vw, 1.2rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: var(--shadow-lg);
  background: var(--bg-white);
  transition: var(--transition-normal);
  min-width: 0;
  flex: 1;
  max-width: 220px;
  min-width: 170px;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 32px -12px rgba(15, 23, 42, 0.25);
}

.hero .stat-item {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 24px 48px -20px rgba(2, 6, 23, 0.55);
  backdrop-filter: blur(16px);
}

.stat-number {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  display: block;
  color: var(--primary-color);
  letter-spacing: -0.01em;
}

.hero .stat-number {
  color: #FFFFFF;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-medium);
  font-weight: 600;
}

.hero .stat-label {
  color: #FFFFFF;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-md) clamp(1.8rem, 4vw, 2.5rem);
  border: none;
  border-radius: 999px;
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

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

.btn-primary {
  background: var(--primary-color);
  color: var(--text-white);
  box-shadow: 0 18px 36px -18px rgba(37, 99, 235, 0.8);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 26px 40px -18px rgba(30, 64, 175, 0.55);
  text-decoration: none;
}

.btn-primary:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  color: var(--text-white);
  border: 2px solid var(--text-white);
}

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

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

/* Cards */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: var(--transition-normal);
}

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

.card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  transition: var(--transition-normal);
}

.card:hover .card-img {
  transform: scale(1.05);
}

.card-body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

.card-text {
  color: var(--text-medium);
  margin-bottom: 0;
  line-height: 1.6;
  max-width: 65ch;
}

.card-body .btn {
  align-self: flex-start;
  margin-top: var(--spacing-sm);
}

.process-grid {
  gap: var(--spacing-lg);
}

.process-card .card-body {
  align-items: flex-start;
  text-align: left;
  gap: var(--spacing-md);
}

.process-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-color);
  font-size: 1.75rem;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.25);
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.impact-grid .stat-item {
  background: var(--bg-white);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: var(--shadow-md);
}

/* Image Gallery Slideshow */
.slideshow {
  position: relative;
  max-width: 100%;
  margin: var(--spacing-xl) auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.slideshow-container {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
}

.slides {
  position: absolute;
  inset: 0;
  display: none;
  width: 100%;
  height: 100%;
}

.slides::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.55) 60%, rgba(15, 23, 42, 0.78) 100%);
  pointer-events: none;
}

.slides img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.78) saturate(0.95);
}

/* Navigation buttons */
.slideshow-nav {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: 44px;
  height: 44px;
  margin-top: -22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--text-white);
  font-size: 1.35rem;
  transition: var(--transition-fast);
  user-select: none;
  background: rgba(6, 16, 31, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 12px 24px -16px rgba(15, 23, 42, 0.6);
  z-index: 10;
}

.slideshow-nav:hover {
  background: rgba(37, 99, 235, 0.75);
  border-color: rgba(255, 255, 255, 0.35);
}

.prev { left: clamp(0.75rem, 2vw, 1.5rem); }
.next { right: clamp(0.75rem, 2vw, 1.5rem); }

/* Caption Text */
.slideshow-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: clamp(1.5rem, 3vw, 2.6rem) clamp(1.4rem, 4vw, 3rem);
  color: var(--text-white);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
  text-align: left;
  z-index: 2;
}

/* Dots indicator */
.dots-container {
  text-align: center;
  padding: var(--spacing-md) 0;
  background: var(--bg-light);
}

.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 8px;
  background-color: var(--border-color);
  border-radius: 50%;
  display: inline-block;
  transition: var(--transition-fast);
}

.dot.active,
.dot:hover {
  background-color: var(--primary-color);
}

/* Fading animation */
.fade {
  animation-name: fade;
  animation-duration: 1.5s;
}

@keyframes fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Team Section */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.team-member {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.team-member:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.team-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--spacing-md);
  border: 4px solid var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.team-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-dark);
}

.team-role {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.team-bio {
  color: var(--text-medium);
  line-height: 1.6;
}

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: var(--transition-normal);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: var(--spacing-lg);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: var(--transition-normal);
}

.faq-question.active::after {
  content: '−';
}

.faq-answer {
  padding: 0 var(--spacing-lg);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
  color: var(--text-medium);
  line-height: 1.6;
}

.faq-question.active + .faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  max-height: 500px;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-dark);
}

.form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition-normal);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: #FFFFFF;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

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

.footer-section h3 {
  margin-bottom: var(--spacing-md);
  color: #FFFFFF;
  font-size: 1.25rem;
}

.footer-section p {
  color: #FFFFFF;
}

/* Icon Classes */
.icon-feature {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.icon-contact {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

/* Container Classes */
.container-narrow {
  max-width: 800px;
  margin: 0 auto;
}

/* Card Icon Standardization */
.card-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

/* Text alignment with margins */
.text-center-margin {
  text-align: center;
}

/* List styling for team members */
.list-feature {
  text-align: left;
  color: var(--text-medium);
  line-height: 1.8;
}

/* Custom utility classes */
.section-hero-padding {
  padding-top: 100px;
}

/* Large icon for special emphasis */
.icon-large {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

/* List styling for contact page */
.list-features {
  color: var(--text-medium);
  line-height: 1.6;
}

.list-features-margin {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: #FFFFFF;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile Navigation Fixes */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border-color);
  }
  
  .nav.active {
    display: flex;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .logo img {
    height: 40px;
  }
  
  .hero {
    min-height: clamp(480px, 82vh, 620px);
    padding: clamp(5rem, 12vw, 6rem) 0 var(--spacing-xl);
  }

  .hero::before {
    background-color: rgba(0, 0, 0, 0.5);
  }

  .hero-content {
    padding: 0 var(--spacing-sm);
    gap: var(--spacing-lg);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .stat-item {
    max-width: none;
    flex: none;
  }

  .slideshow-container {
    height: 360px;
  }

  .slideshow-caption {
    font-size: 1rem;
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-bottom p {
    white-space: nowrap; /* Prevent text wrapping */
  }
}

/* Responsive Navigation */
@media (max-width: 480px) {
  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
  }

  .slideshow-container {
    height: 280px;
  }

  .slideshow-caption {
    padding: var(--spacing-md);
    font-size: 0.95rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .slideshow-nav {
    padding: var(--spacing-sm);
    font-size: 1.25rem;
  }
  
  .prev, .next {
    font-size: 1rem;
    padding: var(--spacing-sm);
  }
}

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

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

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

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.hidden-visually {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 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 styles for accessibility */
.btn:focus,
.form-control:focus,
.nav-link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}