:root {
  --color-text: #2c3e50;
  --color-text-secondary: #5a6c7d;
  --color-bg: #f8f9fa;
  --color-container-bg: #ffffff;
  --color-link: #333;
  --color-link-hover: #000;
  --color-border: #e1e4e8;
  --color-shadow: rgba(0, 0, 0, 0.1);

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e4e6eb;
    --color-text-secondary: #b0b3b8;
    --color-bg: #18191a;
    --color-container-bg: #242526;
    --color-link: #e4e6eb;
    --color-link-hover: #ffffff;
    --color-border: #3a3b3c;
    --color-shadow: rgba(0, 0, 0, 0.5);

    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
    sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  width: 100%;
  min-height: 100vh;
  max-width: 800px;
  margin: 0 auto;
  margin-left: 2rem;
  background-color: var(--color-bg);
  transition: background-color 0.3s ease;
}

.nav-content {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.nav-content a {
  text-decoration: none;
  color: var(--color-link);
  transition: color 0.2s ease;
}

.nav-content a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.nav-content a.active {
  text-decoration: underline;
  font-weight: 600;
}