/* Base styles and variables */
:root {
  --color-primary: #ffcc00;
  --color-primary-dark: #e6b800;
  --color-primary-light: #fff9c2;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-alt: #f9f9f9;
  --color-border: #eeeeee;
  --color-white: #ffffff;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --transition: all 0.3s ease;
  --container-width: 1200px;
}

/* Dark mode colors */
.dark-mode {
  --color-primary: #ffcc00;
  --color-primary-dark: #cc9900;
  --color-primary-light: #664d00;
  --color-text: #e1e1e1;
  --color-text-light: #a0a0a0;
  --color-bg: #111827;
  --color-bg-alt: #1f2937;
  --color-border: #374151;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

ul {
  list-style: none;
}

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hidden {
  display: none !important;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 0.5em;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

.section-subtitle {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Navigation */
#main-nav {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.dark-mode #main-nav {
  background-color: var(--color-bg-alt);
}

#main-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
}

.globe-icon {
  color: var(--color-primary);
  margin-right: 0.5rem;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-text);
}

.dark-mode .logo-text {
  color: var(--color-white);
}

.nav-items {
  display: flex;
  align-items: center;
}

.dark-mode-toggle {
  margin-right: 1.5rem;
  background-color: var(--color-primary-light);
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.dark-mode-toggle:hover {
  background-color: var(--color-primary);
}

.moon-icon, .sun-icon {
  color: var(--color-text);
}

.dark-mode .moon-icon {
  display: none;
}

.dark-mode .sun-icon {
  display: block;
  color: var(--color-bg);
}

.sun-icon {
  display: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

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

.dark-mode .nav-link {
  color: var(--color-text);
}

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

/* Page styling */
.page {
  display: none;
  padding: 2rem 0;
}

.page.active {
  display: block;
}

/* Hero Section */
.hero-section {
  padding: 4rem 0;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.hero-text {
  max-width: 600px;
}

.hero-text h1 {
  margin-bottom: 1.5rem;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.download-btn svg {
  margin-right: 0.5rem;
}

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

.version-info {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.hero-image {
  width: 100%;
  max-width: 500px;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Features Section */
.features-section {
  background-color: var(--color-bg-alt);
  padding: 5rem 0;
}

.dark-mode .features-section {
  background-color: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.dark-mode .feature-card {
  background-color: var(--color-bg-alt);
}

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

.feature-icon {
  width: 3rem;
  height: 3rem;
  background-color: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  color: var(--color-primary-dark);
}

.dark-mode .feature-icon {
  background-color: var(--color-primary-dark);
}

.dark-mode .feature-icon svg {
  color: var(--color-primary-light);
}

/* Download Section */
.download-section {
  padding: 5rem 0;
}

.download-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.download-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-md);
}

.dark-mode .download-card {
  background-color: var(--color-bg-alt);
}

.download-info {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.download-icon {
  margin-right: 1rem;
}

.download-icon svg {
  color: var(--color-primary);
}

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

.download-details h3 {
  margin-bottom: 0.25rem;
}

.download-apk-btn {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
}

.download-apk-btn svg {
  margin-right: 0.5rem;
}

.download-apk-btn:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.download-terms {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.terms-link, .privacy-link {
  text-decoration: underline;
}

/* Why Choose UC Section */
.why-choose-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 5rem 0;
  text-align: center;
}

.dark-mode .why-choose-section {
  background-color: #664d00;
}

.why-choose-section h2, 
.why-choose-section p {
  color: var(--color-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.stat-card {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

/* FAQ Section */
.faq-section {
  background-color: var(--color-bg-alt);
  padding: 5rem 0;
}

.dark-mode .faq-section {
  background-color: var(--color-bg);
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 800px;
  margin: 3rem auto 0;
}

.faq-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.dark-mode .faq-card {
  background-color: var(--color-bg-alt);
}

/* Privacy and Terms Pages */
.policy-container {
  max-width: 800px;
  margin: 2rem auto;
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem;
}

.dark-mode .policy-container {
  background-color: var(--color-bg-alt);
}

.policy-header {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}

.policy-icon {
  margin-right: 1rem;
  color: var(--color-primary);
}

.policy-date {
  margin-bottom: 2rem;
  color: var(--color-text-light);
}

.policy-section {
  margin-bottom: 2.5rem;
}

.policy-section h2 {
  font-size: 1.5rem;
  text-align: left;
  margin-bottom: 1rem;
}

.policy-section h3 {
  color: var(--color-primary-dark);
  margin-top: 1.5rem;
  margin-bottom: 1rem;
}

.dark-mode .policy-section h3 {
  color: var(--color-primary);
}

.policy-section ul {
  list-style-type: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.policy-section li {
  margin-bottom: 0.5rem;
  color: var(--color-text-light);
}

.contact-info {
  background-color: var(--color-bg-alt);
  padding: 1.5rem;
  border-radius: var(--radius-md);
}

.dark-mode .contact-info {
  background-color: var(--color-bg);
}

/* Footer */
footer {
  background-color: #111827;
  color: #a0a0a0;
  padding: 3rem 0 1.5rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
}

.footer-logo svg {
  color: var(--color-primary);
  margin-right: 0.75rem;
}

.footer-logo span {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-white);
}

.footer-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.footer-link {
  color: #a0a0a0;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-top: 1.5rem;
  text-align: center;
}

/* Media Queries */
@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }
  
  .hero-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .hero-text {
    flex: 1;
  }
  
  .hero-image {
    flex: 1;
  }
  
  .download-card {
    flex-direction: row;
  }
  
  .download-info {
    margin-bottom: 0;
  }
  
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (max-width: 767px) {
  .nav-links {
    display: none;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .policy-container {
    padding: 1.5rem;
  }
}