:root {
  --bg-color: #f8f9fa;
  --text-color: #333;
  --text-color-light: #555;
  --text-color-lighter: #777;
  --logo-color: #4285F4;
  --link-color: #007bff;
  --card-bg: #ffffff;
  --card-border: #dfe1e5;
  --menu-bg: #ffffff;
  --menu-border: #dfe1e5;
  --menu-shadow: rgba(0, 0, 0, 0.1);
  --menu-shadow-hover: rgba(0, 0, 0, 0.15);
  --modal-bg: #ffffff;
  --modal-border: #ccc;
  --modal-shadow: rgba(0, 0, 0, 0.2);
  --sidebar-bg: #f8f9fa;
  --sidebar-link-hover: #e9ecef;
  
  --form-input-bg: #fff;
  --form-input-border: #ccc;
  --form-input-focus-border: #007bff;
  --button-bg: #007bff;
  --button-text: #fff;
  --button-hover-bg: #0056b3;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-color-light: #bbb;
    --text-color-lighter: #888;
    --logo-color: #5a9bff;
    --link-color: #5a9bff;
    --card-bg: #2a2a2a;
    --card-border: #444;
    --menu-bg: #2a2a2a;
    --menu-border: #444;
    --menu-shadow: rgba(0, 0, 0, 0.3);
    --menu-shadow-hover: rgba(0, 0, 0, 0.4);
    --modal-bg: #333;
    --modal-border: #555;
    --modal-shadow: rgba(0, 0, 0, 0.4);
    --sidebar-bg: #1a1a1a;
    --sidebar-link-hover: #343a40;
    --form-input-bg: #333;
    --form-input-border: #555;
    --form-input-focus-border: #5a9bff;
    --button-bg: #5a9bff;
    --button-text: #1a1a1a;
    --button-hover-bg: #7aaeff;
  }
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --text-color-light: #bbb;
  --text-color-lighter: #888;
  --logo-color: #5a9bff;
  --link-color: #5a9bff;
  --card-bg: #2a2a2a;
  --card-border: #444;
  --menu-bg: #2a2a2a;
  --menu-border: #444;
  --menu-shadow: rgba(0, 0, 0, 0.3);
  --menu-shadow-hover: rgba(0, 0, 0, 0.4);
  --modal-bg: #333;
  --modal-border: #555;
  --modal-shadow: rgba(0, 0, 0, 0.4);
  --sidebar-bg: #1a1a1a;
  --sidebar-link-hover: #343a40;
  --form-input-bg: #333;
  --form-input-border: #555;
  --form-input-focus-border: #5a9bff;
  --button-bg: #5a9bff;
  --button-text: #1a1a1a;
  --button-hover-bg: #7aaeff;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;

  transition: background-color 0.2s, color 0.2s;
}