:root {
  --background-color-light: #f4f4f4;
  --text-color-light: #333;
  --primary-color-light: #007bff;
  --primary-dark-color-light: #0056b3;
  --fortune-bg-light: #e7f3ff;
  --fortune-border-light: #007bff;
  --heading-color-light: #0056b3;

  --background-color-dark: #222;
  --text-color-dark: #eee;
  --primary-color-dark: #66b3ff;
  --primary-dark-color-dark: #3385ff;
  --fortune-bg-dark: #333;
  --fortune-border-dark: #66b3ff;
  --heading-color-dark: #66b3ff;
}

body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  background-color: var(--background-color-light);
  color: var(--text-color-light);
  transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
  background-color: var(--background-color-dark);
  color: var(--text-color-dark);
}

h1 {
  color: var(--heading-color-light);
  margin-bottom: 20px;
  transition: color 0.3s;
}

body.dark-mode h1 {
  color: var(--heading-color-dark);
}

div {
  margin-bottom: 15px;
  text-align: center;
}

label {
  margin-right: 10px;
  font-size: 1.1em;
}

input[type="date"] {
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1em;
  background-color: white; /* Ensure readability in both modes */
  color: #333; /* Ensure readability in both modes */
}

body.dark-mode input[type="date"] {
  background-color: #444;
  color: #eee;
  border-color: #666;
}

button {
  padding: 10px 20px;
  background-color: var(--primary-color-light);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1em;
  margin-left: 10px;
  transition: background-color 0.3s;
}

body.dark-mode button {
  background-color: var(--primary-color-dark);
}

button:hover {
  background-color: var(--primary-dark-color-light);
}

body.dark-mode button:hover {
  background-color: var(--primary-dark-color-dark);
}


#themeToggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: var(--primary-color-light);
  color: white;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2em;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s, transform 0.3s;
  margin-left: 0; /* Override default button margin */
}

body.dark-mode #themeToggle {
  background-color: var(--primary-color-dark);
}

#themeToggle:hover {
  transform: scale(1.1);
}

#fortuneDisplay {
  margin-top: 30px;
  padding: 20px;
  border: 1px solid var(--fortune-border-light);
  border-radius: 8px;
  background-color: var(--fortune-bg-light);
  min-height: 100px;
  width: 80%;
  max-width: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 1.2em;
  color: var(--heading-color-light);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

body.dark-mode #fortuneDisplay {
  border: 1px solid var(--fortune-border-dark);
  background-color: var(--fortune-bg-dark);
  color: var(--heading-color-dark);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}