:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --accent-color: #000000;
  --secondary-bg: #f5f5f5;
  --border-color: #e0e0e0;
}

[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --accent-color: #ffffff;
  --secondary-bg: #1e1e1e;
  --border-color: #333333;
}

* {
  box-sizing: border-box;
  transition: background-color 0.3s, color 0.3s;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

header {
  padding: 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background-color: var(--bg-color);
  z-index: 10;
}

h1 {
  font-size: 1.5rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.5px;
}

button.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.9rem;
}

button.theme-toggle:hover {
  background-color: var(--secondary-bg);
}

main {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 2rem;
}

section {
  margin-bottom: 4rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  color: var(--text-color);
  opacity: 0.9;
}

.code-placeholder {
  background-color: var(--secondary-bg);
  padding: 2rem;
  border-radius: 8px;
  border: 1px dashed var(--border-color);
  text-align: center;
  margin: 3rem 0;
}

.status-badge {
  display: inline-block;
  padding: 4px 8px;
  background-color: #e3f2fd;
  color: #0d47a1;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  opacity: 0.6;
}