:root {
  /* Light theme. */
  --color-bg: #ffffff;
  --color-surface: #eaf3fb;
  --color-text: #1a1a1a;
  --color-border: #d0e0ef;
  --color-primary: #4a90e2;
  --color-primary-light: #4a90e222;
  --color-hover: #4a90e210;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s, color 0.3s;
}

#mainContent {
  top: 200px
}