/* CSS Custom Properties for theming */
:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f5f5f7;
  --color-text: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-border: #d2d2d7;
  --max-width: 800px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-bg-secondary: #1c1c1e;
    --color-text: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-accent: #2997ff;
    --color-accent-hover: #40a9ff;
    --color-border: #424245;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* Typography */
h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

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

/* Hero section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.tagline {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* Features section */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  padding: var(--spacing-lg) 0;
}

.feature {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md);
  border-radius: 12px;
}

.feature h3 {
  color: var(--color-text);
}

.feature p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Screenshots section */
.screenshots {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.screenshots-placeholder {
  color: var(--color-text-secondary);
  font-style: italic;
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border-radius: 12px;
}

/* Download section */
.download {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.store-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.store-badge img {
  height: 48px;
  transition: opacity 0.2s ease;
}

.store-badge:hover img {
  opacity: 0.8;
}

/* Privacy page */
.privacy {
  padding: var(--spacing-lg) 0;
}

.privacy h1 {
  margin-bottom: var(--spacing-xs);
}

.privacy .updated {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
}

.privacy section {
  margin-bottom: var(--spacing-md);
}

.privacy section h2 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.back-link {
  margin-top: var(--spacing-lg);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

footer a {
  color: var(--color-text-secondary);
}

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

/* Responsive */
@media (max-width: 600px) {
  h1 {
    font-size: 2.25rem;
  }

  .tagline {
    font-size: 1.25rem;
  }

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

  .hero {
    padding: var(--spacing-lg) 0;
  }
}