:root {
  --color-bg: #faf9f7;
  --color-text: #2c2c2c;
  --color-text-muted: #666;
  --color-accent: #4a6741;
  --color-accent-hover: #3d5636;
  --color-border: #e0ddd8;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-text: #e8e6e3;
    --color-text-muted: #a0a0a0;
    --color-accent: #7fa376;
    --color-accent-hover: #9ab893;
    --color-border: #333;
  }
}

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

html {
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

main {
  flex: 1;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  width: 100%;
}

.feature {
  margin-bottom: 2.5rem;
}

.feature h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

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

.steps {
  list-style: none;
  counter-reset: step;
}

.steps li {
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  padding-left: 0;
}

.steps li strong {
  color: var(--color-text);
}

.download {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: 1rem;
}

.download h2 {
  margin-bottom: 1.25rem;
}

.app-store-button {
  display: inline-block;
  background-color: var(--color-accent);
  color: #fff;
  padding: 0.875rem 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.app-store-button:hover {
  background-color: var(--color-accent-hover);
}

.placeholder-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

footer a {
  color: var(--color-accent);
  text-decoration: none;
  margin-left: 1rem;
}

footer a:hover {
  text-decoration: underline;
}

@media (min-width: 640px) {
  header {
    padding: 4rem 2rem 3rem;
  }

  header h1 {
    font-size: 2.5rem;
  }

  .tagline {
    font-size: 1.25rem;
  }

  main {
    padding: 0 2rem 4rem;
  }

  .feature h2 {
    font-size: 1.375rem;
  }
}