:root {
  /* Vibrant Indigo and Coral Theme */
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-indigo-500: #4B0082;
  --color-indigo-600: #3F0071;
  --color-indigo-700: #311B92;
  --color-coral-500: #FF6F61;
  --color-coral-600: #F05447;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #E0E0E0;
  --color-gray-300: #BDBDBD;
  --color-gray-700: #424242;
  --color-green-500: #4CAF50;
  --color-red-500: #EF5350;

  /* RGB for Opacity */
  --color-indigo-500-rgb: 75, 0, 130;
  --color-coral-500-rgb: 255, 111, 97;
  --color-gray-700-rgb: 66, 66, 66;

  /* Backgrounds */
  --color-bg-1: rgba(75, 0, 130, 0.1);
  --color-bg-2: rgba(255, 111, 97, 0.1);
  --color-bg-3: rgba(33, 150, 243, 0.1);
  --color-bg-4: rgba(76, 175, 80, 0.1);

  /* Semantic Colors */
  --color-background: var(--color-gray-100);
  --color-surface: var(--color-white);
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-primary: var(--color-indigo-500);
  --color-primary-hover: var(--color-indigo-600);
  --color-secondary: var(--color-coral-500);
  --color-secondary-hover: var(--color-coral-600);
  --color-border: rgba(var(--color-gray-700-rgb), 0.2);
  --color-btn-primary-text: var(--color-white);
  --color-card-border: rgba(var(--color-gray-700-rgb), 0.1);
  --color-success: var(--color-green-500);
  --color-error: var(--color-red-500);

  /* Typography */
  --font-family-base: 'Inter', sans-serif;
  --font-family-heading: 'Poppins', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --font-size-2xl: 2.5rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Spacing */
  --space-4: 0.25rem;
  --space-8: 0.5rem;
  --space-12: 0.75rem;
  --space-16: 1rem;
  --space-24: 1.5rem;
  --space-32: 2rem;
  --space-48: 3rem;

  /* Radius and Shadows */
  --radius-sm: 0.25rem;
  --radius-base: 0.5rem;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --duration-fast: 200ms;
  --ease-standard: ease-in-out;
}

/* Global Styles */
body {
  font-family: var(--font-family-base);
  background-color: var(--color-background);
  color: var(--color-text);
  margin: 0;
  line-height: 1.6;
  font-size: var(--font-size-base);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-16);
}

.btn {
  padding: var(--space-12) var(--space-24);
  border-radius: var(--radius-base);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  border: none;
  display: inline-flex;
  align-items: center;
}

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

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

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

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

.icon {
  margin-right: var(--space-8);
}

.large-icon {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
}

/* Header */
.header {
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: fixed;
  width: 100%;
  z-index: 1000;
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-16) 0;
}

.header__logo h1 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  margin: 0;
  color: var(--color-primary);
  display: flex;
  align-items: center;
}

.header__nav {
  display: flex;
  gap: var(--space-24);
}

.nav-link {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

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

.nav-link.active::after {
  content: '';
  display: block;
  height: 2px;
  background: var(--color-primary);
  margin-top: var(--space-4);
}

.header__search {
  display: flex;
  gap: var(--space-8);
}

.search-input {
  padding: var(--space-8) var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.search-btn {
  padding: var(--space-8) var(--space-12);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--duration-fast) var(--ease-standard);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-indigo-500), var(--color-coral-500));
  color: var(--color-white);
  padding: 120px 0 80px;
  text-align: center;
}

.hero__content h2 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
}

.hero__content p {
  font-size: var(--font-size-md);
  max-width: 600px;
  margin: 0 auto var(--space-24);
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-32);
  margin-bottom: var(--space-24);
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
}

.stat__label {
  font-size: var(--font-size-sm);
}

.hero__cta {
  display: flex;
  justify-content: center;
  gap: var(--space-16);
}

/* Sections */
.section {
  padding: var(--space-48) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-32);
}

.section__header h2 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.section__header p {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

.categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-24);
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-24);
  transition: transform var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}

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

.category-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-12);
}

.category-card__header h3 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-md);
  display: flex;
  align-items: center;
}

.category-card__count {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.category-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.category-card__items {
  display: none;
  flex-direction: column;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.category-card__items.expanded {
  display: flex;
}

/* This is the CSS for the individual item boxes */
.item {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4); /* Reduced padding for a smaller box size */
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.item:hover {
  background: var(--color-bg-2);
  border-color: var(--color-secondary);
}

.item__name {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.item__description {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

/* About Section */
.about__content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about__content h2 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
}

.about__features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-24);
}

.feature {
  background: var(--color-surface);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-sm);
}

/* Footer */
.footer {
  background: var(--color-indigo-700);
  color: var(--color-gray-200);
  padding: var(--space-32) 0;
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, min-content);
  gap: var(--space-24);
}

.footer__section h3, .footer__section h4 {
  font-family: var(--font-family-heading);
  margin-bottom: var(--space-12);
}

.footer__section h3 {
  color: var(--color-coral-500);
}

.footer__section a {
  color: var(--color-gray-200);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.footer__section a:hover {
  color: var(--color-coral-500);
}

.newsletter-form {
  display: flex;
  gap: var(--space-8);
}

.newsletter-form input {
  padding: var(--space-8);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.hidden {
  opacity: 0;
  visibility: hidden;
}

.modal__content {
  background: var(--color-surface);
  border-radius: var(--radius-base);
  max-width: 600px;
  width: 90%;
  padding: var(--space-24);
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  transform: translateY(0);
  transition: transform 0.3s ease;
}

.modal.hidden .modal__content {
  transform: translateY(-20px);
}

.modal__header {
  padding-bottom: var(--space-16);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal__close {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  color: var(--color-text);
}

.modal__body {
  padding-top: var(--space-16);
}

.search-result {
  padding: var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-8);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.search-result:hover {
  background: var(--color-bg-2);
  border-color: var(--color-secondary);
}

.loading-overlay {
  background: rgba(0, 0, 0, 0.8);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-coral-500);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ---------- Responsive Design Tweaks ---------- */

/* Medium screens (Laptops/Tablets) */
@media (max-width: 1024px) {
  .categories {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

/* Tablets & Small Laptops */
@media (max-width: 768px) {
  .header__nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: var(--space-16);
    box-shadow: var(--shadow-sm);
  }

  .header__nav.mobile-open {
    display: flex;
  }

  .nav-link {
    font-size: var(--font-size-base);
    padding: var(--space-8) 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .nav-link.active::after {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 1001; /* Ensure button is above the mobile menu */
  }
  
  .hero__stats,
  .hero__cta {
    flex-direction: column;
    gap: var(--space-16);
    align-items: center;
  }

  .categories,
  .about__features {
    grid-template-columns: 1fr;
  }

  .newsletter-form {
    flex-direction: column;
  }
  
  .footer__content {
      grid-template-columns: 1fr;
      text-align: center;
  }
}

/* Mobile Phones */
@media (max-width: 480px) {
  .header__content {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  
  .header__logo {
    order: 1;
  }
  
  .mobile-menu-btn {
    order: 2;
  }
  
  .header__search {
    order: 3;
    flex: 1 1 100%;
    margin-top: var(--space-16);
  }
  
  .header__nav {
      top: 100px;
  }

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

  .hero__content p {
    font-size: var(--font-size-base);
  }

  .footer__section {
    padding-bottom: var(--space-24);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .footer__section:last-child {
    border-bottom: none;
  }

  .footer__social {
    display: flex;
    justify-content: center;
    gap: var(--space-16);
  }
}