/* StudentSaver AI - Main Stylesheet
   Version: 1.0
   Last Updated: August 15, 2025
*/

/* ===== GLOBAL STYLES ===== */
:root {
  /* Primary Color Palette */
  --primary-color: #4a6bff;
  --primary-dark: #3451d1;
  --primary-light: #7c8fff;
  
  /* Secondary Color Palette */
  --secondary-color: #764ba2;
  --secondary-dark: #5c3b7e;
  --secondary-light: #9170c7;
  
  /* Accent Colors */
  --accent-color: #22c55e;
  --accent-dark: #15803d;
  --accent-light: #4ade80;
  
  /* Neutral Colors */
  --dark: #1e293b;
  --medium-dark: #334155;
  --medium: #64748b;
  --medium-light: #94a3b8;
  --light: #e2e8f0;
  --very-light: #f8fafc;
  
  /* Alert Colors */
  --success: #22c55e;
  --warning: #eab308;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-secondary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Roboto Mono', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  
  /* 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: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* 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);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark Mode Colors */
@media (prefers-color-scheme: dark) {
  :root {
    --dark: #f8fafc;
    --medium-dark: #e2e8f0;
    --medium: #94a3b8;
    --medium-light: #64748b;
    --light: #334155;
    --very-light: #1e293b;
  }
}

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

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--very-light);
  overflow-x: hidden;
}

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

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

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

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

h1 {
  font-size: 2.5rem;
}

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);
}

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

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

/* ===== HEADER STYLES ===== */
header {
  background-color: var(--very-light);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-md) 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-family: var(--font-secondary);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
}

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

nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav ul li {
  margin-left: var(--spacing-lg);
}

nav ul li a {
  color: var(--dark);
  font-weight: 500;
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

nav ul li a:hover, nav ul li a.active {
  color: var(--primary-color);
  background-color: rgba(74, 107, 255, 0.1);
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--dark);
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--very-light);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: 200;
  }
  
  nav.active {
    transform: translateX(0);
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
  }
  
  nav ul li {
    margin: var(--spacing-md) 0;
  }
  
  nav ul li a {
    font-size: 1.25rem;
  }
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: white;
}

.hero p {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.125rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
}

/* ===== DEAL CARDS ===== */
.deals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.deal-card {
  background-color: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.deal-image {
  height: 200px;
  background-color: var(--light);
  overflow: hidden;
}

.deal-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

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

.deal-content {
  padding: var(--spacing-lg);
}

.deal-retailer {
  font-size: 0.875rem;
  color: var(--medium);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
}

.deal-retailer img {
  width: 16px;
  height: 16px;
  margin-right: var(--spacing-xs);
}

.deal-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.deal-price {
  display: flex;
  align-items: baseline;
  margin-bottom: var(--spacing-md);
}

.current-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
}

.original-price {
  font-size: 1rem;
  color: var(--medium);
  text-decoration: line-through;
  margin-left: var(--spacing-sm);
}

.discount-badge {
  background-color: var(--accent-color);
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  margin-left: var(--spacing-sm);
}

.deal-description {
  color: var(--medium-dark);
  margin-bottom: var(--spacing-md);
}

.deal-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--medium);
}

.deal-rating {
  display: flex;
  align-items: center;
}

.deal-rating .stars {
  color: var(--warning);
  margin-right: var(--spacing-xs);
}

.deal-expires {
  display: flex;
  align-items: center;
}

.deal-expires .icon {
  margin-right: var(--spacing-xs);
}

.deal-actions {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-md);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: white;
  text-decoration: none;
}

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

.btn-secondary:hover {
  background-color: var(--secondary-dark);
  color: white;
  text-decoration: none;
}

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

.btn-outline:hover {
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

.btn-full {
  width: 100%;
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title h2 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-sm);
}

.section-title p {
  font-size: 1.125rem;
  color: var(--medium);
  max-width: 800px;
  margin: 0 auto;
}

/* ===== CATEGORIES ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.category-card {
  background-color: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-align: center;
  padding: var(--spacing-lg);
}

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

.category-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.category-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.category-count {
  color: var(--medium);
  font-size: 0.875rem;
}

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.feature-card {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-description {
  color: var(--medium-dark);
}

/* ===== TESTIMONIALS ===== */
.testimonials-section {
  background-color: var(--light);
  padding: var(--spacing-3xl) 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.testimonial-card {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.testimonial-content {
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.testimonial-content::before {
  content: '"';
  font-size: 4rem;
  color: var(--light);
  position: absolute;
  top: -20px;
  left: -10px;
  z-index: 0;
}

.testimonial-author {
  display: flex;
  align-items: center;
}

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  overflow: hidden;
  margin-right: var(--spacing-md);
}

.testimonial-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.testimonial-info h4 {
  margin-bottom: var(--spacing-xs);
}

.testimonial-info p {
  color: var(--medium);
  font-size: 0.875rem;
  margin: 0;
}

/* ===== NEWSLETTER ===== */
.newsletter-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.newsletter-section h2 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.newsletter-section p {
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

.newsletter-form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
}

.newsletter-form input {
  flex: 1;
  padding: var(--spacing-md);
  border: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  font-size: 1rem;
}

.newsletter-form button {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.newsletter-form button:hover {
  background-color: var(--accent-dark);
}

@media (max-width: 768px) {
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-form input {
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }
  
  .newsletter-form button {
    border-radius: var(--radius-md);
  }
}

/* ===== FOOTER ===== */
footer {
  background-color: var(--dark);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

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

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

.footer-section p {
  color: var(--medium-light);
  margin-bottom: var(--spacing-md);
}

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

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

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

.footer-section ul li a:hover {
  color: white;
  text-decoration: none;
}

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

.social-icon {
  color: var(--medium-light);
  transition: color var(--transition-fast);
}

.social-icon:hover {
  color: white;
  text-decoration: none;
}

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

.footer-bottom p {
  color: var(--medium-light);
  font-size: 0.875rem;
  margin: 0;
}

/* ===== LEGAL PAGES ===== */
.legal-document {
  max-width: 800px;
  margin: var(--spacing-2xl) auto;
  background-color: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.legal-document h1 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.last-updated {
  text-align: center;
  color: var(--medium);
  margin-bottom: var(--spacing-xl);
}

.toc {
  background-color: var(--light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xl);
}

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

.toc ol {
  margin-bottom: 0;
}

.toc ol li {
  margin-bottom: var(--spacing-xs);
}

.legal-document section {
  margin-bottom: var(--spacing-2xl);
}

.legal-document h2 {
  border-bottom: 1px solid var(--light);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.legal-document h3 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.legal-document ul, .legal-document ol {
  margin-bottom: var(--spacing-lg);
}

.legal-document li {
  margin-bottom: var(--spacing-xs);
}

.contact-info {
  margin-top: var(--spacing-lg);
}

.contact-info li {
  margin-bottom: var(--spacing-sm);
}

/* ===== CONTACT PAGE ===== */
.contact-hero {
  text-align: center;
  margin: var(--spacing-2xl) 0;
}

.contact-hero .subtitle {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  color: var(--medium);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-form-section, .contact-info-section {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: grid;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

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

.form-group input, .form-group select, .form-group textarea {
  padding: var(--spacing-md);
  border: 1px solid var(--light);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-primary);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.2);
}

.contact-info {
  display: grid;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: flex-start;
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-right: var(--spacing-md);
}

.contact-details h3 {
  margin-bottom: var(--spacing-xs);
}

.contact-details p {
  margin-bottom: var(--spacing-xs);
}

.response-time {
  font-size: 0.875rem;
  color: var(--medium);
}

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

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

.faq-section {
  margin-bottom: var(--spacing-2xl);
}

.faq-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.faq-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .faq-container {
    grid-template-columns: 1fr;
  }
}

.faq-item {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.faq-item h3 {
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.faq-item p {
  margin-bottom: 0;
}

.community-guidelines {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-2xl);
}

.community-guidelines h2 {
  margin-bottom: var(--spacing-md);
}

.community-guidelines ul {
  margin-bottom: 0;
}

.support-info {
  margin-bottom: var(--spacing-2xl);
}

.support-info h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

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

@media (max-width: 768px) {
  .support-grid {
    grid-template-columns: 1fr;
  }
}

.support-item {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.support-item h3 {
  margin-bottom: var(--spacing-md);
}

.support-item ul {
  margin-bottom: 0;
}

/* ===== ABOUT PAGE ===== */
.about-hero {
  text-align: center;
  margin: var(--spacing-2xl) 0;
}

.about-hero .subtitle {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  color: var(--medium);
}

.about-section {
  margin-bottom: var(--spacing-2xl);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

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

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

.team-section {
  margin-bottom: var(--spacing-2xl);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.team-member {
  background-color: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.team-photo {
  height: 250px;
  overflow: hidden;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-info {
  padding: var(--spacing-lg);
}

.team-info h3 {
  margin-bottom: var(--spacing-xs);
}

.team-role {
  color: var(--medium);
  margin-bottom: var(--spacing-md);
}

.team-bio {
  font-size: 0.875rem;
}

.timeline-section {
  margin-bottom: var(--spacing-2xl);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 4px;
  background-color: var(--light);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -2px;
}

.timeline-item {
  padding: var(--spacing-lg) 0;
  position: relative;
}

.timeline-content {
  position: relative;
  width: 45%;
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

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

.timeline-item:nth-child(even) .timeline-content {
  left: 55%;
}

.timeline-date {
  color: var(--medium);
  margin-bottom: var(--spacing-sm);
}

.timeline-title {
  margin-bottom: var(--spacing-sm);
}

.timeline-description {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .timeline::after {
    left: 31px;
  }
  
  .timeline-content {
    width: calc(100% - 80px);
    left: 80px !important;
  }
}

/* ===== CATEGORIES PAGE ===== */
.categories-hero {
  text-align: center;
  margin: var(--spacing-2xl) 0;
}

.categories-hero .subtitle {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  color: var(--medium);
}

.category-section {
  margin-bottom: var(--spacing-2xl);
}

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

.category-header h2 {
  margin-bottom: 0;
}

.category-filters {
  display: flex;
  gap: var(--spacing-md);
}

.filter-dropdown {
  position: relative;
}

.filter-dropdown select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--light);
  border-radius: var(--radius-md);
  background-color: white;
  font-size: 0.875rem;
  appearance: none;
  padding-right: var(--spacing-xl);
  cursor: pointer;
}

.filter-dropdown::after {
  content: '▼';
  font-size: 0.75rem;
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.category-description {
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
}

.buying-guide {
  background-color: var(--light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.buying-guide h3 {
  margin-bottom: var(--spacing-md);
}

.buying-guide-tips {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.buying-tip {
  background-color: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.buying-tip h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.buying-tip p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* ===== AD CONTAINERS ===== */
.ad-container {
  margin: var(--spacing-xl) 0;
  text-align: center;
  background-color: var(--light);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

.ad-container::before {
  content: 'Advertisement';
  display: block;
  text-align: center;
  font-size: 0.75rem;
  color: var(--medium);
  margin-bottom: var(--spacing-xs);
}

/* ===== LOADING ANIMATIONS ===== */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl) 0;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(74, 107, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

.loading-pulse {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.8);
    opacity: 0.8;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(0.8);
    opacity: 0.8;
  }
}

/* ===== DARK MODE STYLES ===== */
@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--very-light);
  }
  
  header {
    background-color: var(--very-light);
  }
  
  .deal-card, .category-card, .feature-card, .testimonial-card,
  .contact-form-section, .contact-info-section, .faq-item,
  .community-guidelines, .support-item, .team-member,
  .timeline-content, .category-description, .buying-tip,
  .legal-document {
    background-color: var(--medium-dark);
  }
  
  .toc, .buying-guide {
    background-color: var(--light);
  }
  
  .form-group input, .form-group select, .form-group textarea {
    background-color: var(--medium-dark);
    border-color: var(--medium);
    color: var(--very-light);
  }
  
  .filter-dropdown select {
    background-color: var(--medium-dark);
    border-color: var(--medium);
    color: var(--very-light);
  }
  
  .ad-container {
    background-color: var(--medium-dark);
  }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

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

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

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mt-5 {
  margin-top: var(--spacing-2xl);
}

.mb-5 {
  margin-bottom: var(--spacing-2xl);
}

.hidden {
  display: none;
}

.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;
}

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