:root {
  /* Backgrounds */
  --color-background:        #0D0D0D;
  --color-surface:           #1A1A1A;
  --color-surface-elevated:  #242424;

  /* Accent */
  --color-accent:            #5B8FA8;
  --color-accent-hover:      #6BA0B9;

  /* Text */
  --color-primary-text:      #F0F0F0;
  --color-secondary-text:    #A0A0A0;
  --color-muted-text:        #666666;

  /* Typography */
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;

  /* Spacing */
  --spacing-xs:   0.5rem;
  --spacing-sm:   1rem;
  --spacing-md:   1.5rem;
  --spacing-lg:   2rem;
  --spacing-xl:   3rem;
  --spacing-2xl:  5rem;

  --max-width:     1200px;
  --content-width: 800px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-background);
  color: var(--color-primary-text);
  line-height: 1.6;
  font-size: 1.125rem;
}

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

.content-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
}

.nav-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-links a {
  color: var(--color-secondary-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  background: rgba(91, 143, 168, 0.2);
}

.lang-btn.active {
  background: var(--color-accent);
  color: var(--color-background);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(80px + var(--spacing-2xl)) var(--spacing-lg) var(--spacing-2xl);
  text-align: center;
}

.hero-content {
  max-width: 700px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--color-secondary-text);
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--color-accent);
  color: var(--color-background);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s ease;
}

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

.cta-button svg {
  width: 24px;
  height: 24px;
}

/* Features Section */
.features {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--color-surface);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  background: var(--color-surface-elevated);
  padding: var(--spacing-xl);
  border-radius: 16px;
  text-align: center;
}

.feature-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--color-secondary-text);
  font-size: 1rem;
}

/* Privacy Highlight */
.privacy-highlight {
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
}

.privacy-content {
  max-width: 600px;
  margin: 0 auto;
}

.privacy-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

.privacy-highlight h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin-bottom: var(--spacing-md);
}

.privacy-highlight p {
  color: var(--color-secondary-text);
  font-size: 1.125rem;
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--color-surface);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-surface-elevated);
  padding: var(--spacing-xl);
  border-radius: 16px;
  text-align: center;
}

.pricing-card.featured {
  border: 2px solid var(--color-accent);
}

.pricing-label {
  font-size: 0.875rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.pricing-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-secondary-text);
}

.pricing-features {
  list-style: none;
  margin-top: var(--spacing-md);
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-xs) 0;
  color: var(--color-secondary-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: bold;
}

/* Download Section */
.download {
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
}

.download h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin-bottom: var(--spacing-md);
}

.download p {
  color: var(--color-secondary-text);
  margin-bottom: var(--spacing-lg);
}

/* Footer */
footer {
  background: var(--color-surface);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
}

.footer-links {
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--color-secondary-text);
  text-decoration: none;
  margin: 0 var(--spacing-md);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.copyright {
  color: var(--color-muted-text);
  font-size: 0.875rem;
}

/* Page Header (for support/privacy) */
.page-header {
  padding: calc(80px + var(--spacing-xl)) var(--spacing-lg) var(--spacing-xl);
  text-align: center;
  background: var(--color-surface);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  color: var(--color-secondary-text);
}

/* Content Sections (for support/privacy) */
.content-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.policy-section {
  max-width: var(--content-width);
  margin: 0 auto var(--spacing-xl);
}

.policy-section h2 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.policy-section p {
  color: var(--color-secondary-text);
  line-height: 1.7;
}

/* FAQ Section */
.faq-section {
  max-width: var(--content-width);
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface-elevated);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.faq-item h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

.faq-item p {
  color: var(--color-secondary-text);
}

/* Contact Section */
.contact-section {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  background: var(--color-surface);
}

.contact-section h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.contact-email {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1.25rem;
}

.contact-email:hover {
  text-decoration: underline;
}

/* Last Updated */
.last-updated {
  text-align: center;
  color: var(--color-muted-text);
  font-size: 0.875rem;
  padding: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    font-size: 1rem;
  }

  .hero {
    flex-direction: column;
    text-align: center;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-links {
    display: none;
  }

  .feature-card h3 {
    font-size: 1.125rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.875rem;
  }

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

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

  .lang-btn {
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
  }
}