:root {
  --bg-color: #fff;
  --text-color: #333;
  --heading-color: #000;
  --pitch-color: #555;
  --footer-color: #999;
  --border-color: #eee;
  --btn-primary-bg: #000;
  --btn-primary-hover: #333;
  --btn-secondary-bg: #fff;
  --btn-secondary-color: #000;
  --btn-secondary-hover: #f5f5f5;
  --logo-filter: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --heading-color: #f0f6fc;
    --pitch-color: #c9d1d9;
    --footer-color: #8b949e;
    --border-color: #30363d;
    --btn-primary-bg: #f0f6fc;
    --btn-primary-hover: #c9d1d9;
    --btn-secondary-bg: transparent;
    --btn-secondary-color: #f0f6fc;
    --btn-secondary-hover: #161b22;
    --logo-filter: invert(1);
  }
}

body.dark-mode {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --heading-color: #f0f6fc;
  --pitch-color: #c9d1d9;
  --footer-color: #8b949e;
  --border-color: #30363d;
  --btn-primary-bg: #f0f6fc;
  --btn-primary-hover: #c9d1d9;
  --btn-secondary-bg: transparent;
  --btn-secondary-color: #f0f6fc;
  --btn-secondary-hover: #161b22;
  --logo-filter: invert(1);
}

body.light-mode {
  --bg-color: #fff;
  --text-color: #333;
  --heading-color: #000;
  --pitch-color: #555;
  --footer-color: #999;
  --border-color: #eee;
  --btn-primary-bg: #000;
  --btn-primary-hover: #333;
  --btn-secondary-bg: #fff;
  --btn-secondary-color: #000;
  --btn-secondary-hover: #f5f5f5;
  --logo-filter: none;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s, color 0.3s;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  position: relative;
}

.container {
  max-width: 700px;
  text-align: center;
}

.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  color: var(--heading-color);
}

.theme-toggle:hover {
  border-color: var(--heading-color);
  transform: scale(1.1);
}

.theme-toggle svg {
  transition: transform 0.2s;
}

.logo {
  width: 120px;
  height: 120px;
  margin-bottom: 1.5rem;
  filter: var(--logo-filter);
  transition: filter 0.3s;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--heading-color);
}

.pitch {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--pitch-color);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.2s;
}

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

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

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-color);
  border: 2px solid var(--btn-secondary-color);
}

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

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

@media (max-width: 640px) {
  .theme-toggle {
    top: 0.5rem;
    right: 0.5rem;
    width: 40px;
    height: 40px;
  }

  .theme-toggle svg {
    width: 18px;
    height: 18px;
  }

  .logo {
    width: 80px;
    height: 80px;
  }

  h1 {
    font-size: 2rem;
  }

  .pitch {
    font-size: 1rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}