/* 
 * johndoe.ai - Main Stylesheet
 * Modern, responsive design for an AI technology company
 */

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

/* ===== CSS Variables ===== */
:root {
  /* Color Scheme - Tech-Forward Blue Scheme from design_notes.md */
  --primary: #0A2342;
  --secondary: #2A7DE1;
  --accent: #23C9CF;
  --background: #F5F7FA;
  --text: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --white: #FFFFFF;
  --light-gray: #EEEEEE;
  --border-color: #E0E0E0;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --overlay: rgba(10, 35, 66, 0.7);
  
  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-md: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Spacing */
  --space-xs: 0.25rem;        /* 4px */
  --space-sm: 0.5rem;         /* 8px */
  --space-md: 1rem;           /* 16px */
  --space-lg: 1.5rem;         /* 24px */
  --space-xl: 2rem;           /* 32px */
  --space-2xl: 3rem;          /* 48px */
  --space-3xl: 4rem;          /* 64px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;       /* 4px */
  --radius-md: 0.5rem;        /* 8px */
  --radius-lg: 1rem;          /* 16px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container Width */
  --container-max-width: 1200px;
  --container-padding: 1.5rem;
  
  /* Z-index layers */
  --z-nav: 100;
  --z-modal: 200;
}

/* ===== Global Styles ===== */
html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: var(--line-height-base);
  color: var(--text);
  background-color: var(--background);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

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

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

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

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

ul, ol {
  list-style-position: inside;
  margin-bottom: var(--space-md);
}

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

/* ===== Section Styles ===== */
section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-light);
  margin-top: var(--space-sm);
}

/* ===== Button Styles ===== */
.primary-button, 
.secondary-button, 
.submit-button,
.service-cta,
.case-study-cta {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-family: var(--font-primary);
  font-size: var(--font-size-md);
}

.primary-button {
  background-color: var(--secondary);
  color: var(--white);
}

.primary-button:hover {
  background-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

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

.secondary-button:hover {
  background-color: var(--secondary);
  color: var(--white);
  transform: translateY(-2px);
}

.submit-button {
  background-color: var(--secondary);
  color: var(--white);
  width: 100%;
  padding: 1rem;
}

.submit-button:hover {
  background-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

/* ===== Header & Navigation ===== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: var(--z-nav);
  transition: all var(--transition-normal);
}

#header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem var(--container-padding);
}

.logo a {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

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

.nav-menu a {
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
  position: relative;
  padding: 0.5rem 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary);
  transition: width var(--transition-normal);
}

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

.nav-menu .cta-button a {
  background-color: var(--secondary);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-menu .cta-button a:hover {
  background-color: var(--primary);
  transform: translateY(-2px);
}

.nav-menu .cta-button a::after {
  display: none;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--primary);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px; /* Account for fixed header */
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.3);
}

.hero-section .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  color: var(--white);
  max-width: 600px;
}

.animated-headline {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-lg);
  color: var(--white);
}

.highlight {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xl);
  color: var(--white);
  opacity: 0.9;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.hero-image {
  flex: 1;
  max-width: 500px;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
  100% {
    transform: translateY(0px);
  }
}

.client-logos {
  background-color: rgba(255, 255, 255, 0.05);
  padding: var(--space-xl) 0;
  margin-top: var(--space-2xl);
  backdrop-filter: blur(5px);
}

.client-logos h3 {
  text-align: center;
  color: var(--white);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-lg);
  font-weight: 500;
}

.logo-grid {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.client-logo {
  color: var(--white);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.client-logo:hover {
  opacity: 1;
}

/* ===== Benefits Section ===== */
.benefits-section {
  background-color: var(--white);
  text-align: center;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.benefit-card {
  background-color: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
}

.benefit-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.benefit-icon {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: var(--space-md);
}

.benefit-card h3 {
  margin-bottom: var(--space-md);
}

/* ===== About Section ===== */
.about-section {
  background-color: var(--background);
}

.split-content {
  display: flex;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  align-items: center;
}

.about-text {
  flex: 1;
}

.about-image {
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px var(--shadow-color);
}

.company-values {
  margin-bottom: var(--space-2xl);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.value-item {
  background-color: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.value-item h4 {
  color: var(--secondary);
  margin-bottom: var(--space-sm);
}

.timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 6px;
  background-color: var(--light-gray);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -3px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  width: 50%;
  box-sizing: border-box;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: var(--white);
  border: 4px solid var(--secondary);
  border-radius: 50%;
  top: 15px;
  z-index: 1;
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item:nth-child(odd)::after {
  right: -10px;
}

.timeline-item:nth-child(even)::after {
  left: -10px;
}

.timeline-content {
  padding: var(--space-md);
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.timeline-date {
  font-weight: bold;
  color: var(--secondary);
  margin-bottom: var(--space-xs);
}

/* ===== Services Section ===== */
.services-section {
  background-color: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.service-card {
  background-color: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(42, 125, 225, 0.1);
}

.service-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.service-card h3 {
  margin-bottom: var(--space-md);
  text-align: center;
}

.service-card p {
  margin-bottom: var(--space-lg);
}

.service-features {
  list-style-type: none;
  margin-bottom: var(--space-lg);
  padding-left: 0;
}

.service-features li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--space-sm);
}

.service-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: bold;
}

.service-cta {
  margin-top: auto;
  align-self: center;
  background-color: var(--secondary);
  color: var(--white);
}

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

/* ===== Case Studies Section ===== */
.case-studies-section {
  background-color: var(--background);
}

.case-studies-slider {
  position: relative;
  overflow: hidden;
}

.case-study {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 5px 15px var(--shadow-color);
  margin-bottom: var(--space-lg);
}

.case-study-content {
  padding: var(--space-xl);
}

.case-study-client {
  color: var(--text-light);
  margin-bottom: var(--space-md);
}

.case-study-results {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.result-item {
  text-align: center;
}

.result-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--secondary);
}

.result-label {
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

.case-study-description {
  margin-bottom: var(--space-lg);
}

.case-study-cta {
  display: inline-block;
  color: var(--secondary);
  font-weight: 600;
}

.slider-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: var(--space-lg);
}

.prev-slide,
.next-slide {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
}

.prev-slide:hover,
.next-slide:hover {
  background-color: rgba(42, 125, 225, 0.1);
}

.slider-dots {
  display: flex;
  gap: 8px;
  margin: 0 var(--space-md);
}

/* ===== Testimonials Section ===== */
.testimonials-section {
  background-color: var(--white);
}

.testimonials-carousel {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.testimonial {
  flex: 1;
  min-width: 300px;
}

.testimonial-content {
  background-color: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  box-shadow: 0 5px 15px var(--shadow-color);
}

.testimonial-content::before {
  content: '"';
  position: absolute;
  top: 10px;
  left: 20px;
  font-size: 5rem;
  color: rgba(42, 125, 225, 0.1);
  font-family: serif;
  line-height: 1;
}

.testimonial-text {
  position: relative;
  z-index: 1;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  margin-top: var(--space-md);
}

.author-info h4 {
  margin-bottom: 0;
}

.author-info p {
  color: var(--text-light);
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

/* ===== Contact Section ===== */
.contact-section {
  background-color: var(--background);
}

.contact-container {
  display: flex;
  gap: var(--space-2xl);
}

.contact-form-container {
  flex: 1;
}

.contact-form {
  background-color: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-md);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(42, 125, 225, 0.1);
}

.contact-info {
  flex: 1;
}

.info-item {
  display: flex;
  margin-bottom: var(--space-lg);
  background-color: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.info-icon {
  margin-right: var(--space-md);
  color: var(--secondary);
  font-size: 1.5rem;
}

.info-content h4 {
  margin-bottom: var(--space-xs);
}

.info-content p {
  color: var(--text-light);
  margin-bottom: 0;
}

.social-links {
  background-color: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.social-icons {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--light-gray);
  color: var(--primary);
  transition: all var(--transition-fast);
}

.social-icon:hover {
  background-color: var(--secondary);
  color: var(--white);
  transform: translateY(-3px);
}

/* ===== FAQ Section ===== */
.faq-section {
  background-color: var(--white);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 10px var(--shadow-color);
}

.faq-question {
  background-color: var(--background);
  padding: var(--space-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question h3 {
  margin-bottom: 0;
  font-size: var(--font-size-lg);
}

.faq-toggle {
  width: 20px;
  height: 20px;
  position: relative;
}

.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  background-color: var(--secondary);
  transition: transform var(--transition-fast);
}

.faq-toggle::before {
  width: 100%;
  height: 2px;
  top: 50%;
  transform: translateY(-50%);
}

.faq-toggle::after {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
}

.faq-item.active .faq-toggle::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.faq-answer {
  background-color: var(--white);
  padding: 0 var(--space-lg);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: var(--space-lg);
}

/* ===== Footer ===== */
.footer {
  background-color: var(--primary);
  color: var(--white);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-logo {
  flex: 1;
  min-width: 250px;
}

.footer-logo a {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.footer-links {
  flex: 2;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.footer-column {
  flex: 1;
  min-width: 150px;
}

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

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: var(--space-sm);
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

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

.legal-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Responsive Styles ===== */

/* Tablets (768px - 1024px) */
@media screen and (max-width: 1024px) {
  :root {
    --container-padding: 1rem;
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  .hero-section .container {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-content {
    max-width: 100%;
    margin-bottom: var(--space-xl);
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .hero-image {
    max-width: 400px;
  }
  
  .split-content {
    flex-direction: column;
  }
  
  .about-image {
    order: -1;
    margin-bottom: var(--space-lg);
  }
  
  .timeline::after {
    left: 31px;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  
  .timeline-item:nth-child(even) {
    left: 0;
  }
  
  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after {
    left: 21px;
  }
  
  .contact-container {
    flex-direction: column;
  }
}

/* Mobile devices (< 768px) */
@media screen and (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
    --space-2xl: 2rem;
  }
  
  h1 {
    font-size: var(--font-size-2xl);
  }
  
  h2 {
    font-size: var(--font-size-xl);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) 0;
    box-shadow: 0 5px 10px var(--shadow-color);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 99;
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  .nav-menu li {
    margin: var(--space-sm) 0;
  }
  
  .hero-cta {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .hero-image {
    max-width: 300px;
  }
  
  .benefits-grid,
  .services-grid,
  .values-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-carousel {
    flex-direction: column;
  }
  
  .footer-content {
    flex-direction: column;
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* ===== Icon Styles ===== */
/* These are placeholders for the icons mentioned in the HTML */
[class^="icon-"] {
  display: inline-block;
  width: 1em;
  height: 1em;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

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

.animated {
  animation: fadeIn 0.8s ease forwards;
}

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

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

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

.hidden {
  display: none !important;
}

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