/* CSS Variables for Theme Customization */
:root {
  /* Color Palette */
  --primary-color: #4F46E5;
  --primary-hover: #4338CA;
  --secondary-color: #10B981;
  --secondary-hover: #0D946E;
  --neutral-light: #F3F4F6;
  --neutral-dark: #1F2937;
  --body-bg: #FFFFFF;
  --text-color: #111827;
  --link-color: #2563EB;
  --link-hover: #1D4ED8;

  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Roboto Slab', serif;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing & Layout */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --section-padding: 3rem;

  /* Effects */
  --radius-btn: 0.375rem;
  --radius-card: 0.5rem;
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition-base: all 0.2s ease-in-out;
}

/* Base Styles */
body {
  font-family: var(--font-primary);
  color: var(--text-color);
  background-color: var(--body-bg);
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

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

a {
  color: var(--link-color);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-btn);
  font-weight: 600;
  text-align: center;
  transition: var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

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

/* Cards */
.card {
  background-color: white;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

.card-body {
  padding: var(--spacing-md);
}

/* Slider Component */
.slider {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
}

.slider-track {
  display: flex;
  transition: transform 0.5s ease;
}

.slider-slide {
  min-width: 100%;
}

.slider-nav {
  position: absolute;
  top: 50%;
  width: 100%;
  display: flex;
  justify-content: space-between;
  transform: translateY(-50%);
  padding: 0 var(--spacing-md);
}

.slider-btn {
  background-color: rgba(255, 255, 255, 0.7);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-base);
}

.slider-btn:hover {
  background-color: white;
}

/* Accordion Component */
.accordion {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.accordion-item {
  border-bottom: 1px solid var(--neutral-light);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  padding: var(--spacing-md);
  background-color: var(--neutral-light);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-base);
}

.accordion-header:hover {
  background-color: #E5E7EB;
}

.accordion-content {
  padding: var(--spacing-md);
  background-color: white;
  display: none;
}

.accordion-item.active .accordion-content {
  display: block;
}

/* Header Styles */
.header {
  background-color: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary-color);
  text-decoration: none;
}

/* Footer Styles */
.footer {
  background-color: var(--neutral-dark);
  color: white;
  padding: var(--section-padding) 0;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: var(--text-xl);
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
  padding: 0;
}

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

.footer-link a {
  color: #D1D5DB;
}

.footer-link a:hover {
  color: white;
  text-decoration: none;
}

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

.social-link {
  color: white;
  font-size: var(--text-lg);
}

.copyright {
  text-align: center;
  color: #9CA3AF;
  padding-top: var(--spacing-md);
  border-top: 1px solid #374151;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --text-base: 0.875rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;
    --text-4xl: 1.75rem;
    --section-padding: 2rem;
  }

  .header-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Animation Enhancements */
@media (prefers-reduced-motion: no-preference) {
  .btn, .card, .accordion-header {
    transition: var(--transition-base);
  }
}