:root {
  --bg-color: #f4f4f4;
  --container-bg: #fff;
  --text-color: #333;
  --primary-color: #e57373;
  --primary-hover: #d85c5c;
  --border-color: #ccc;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --container-bg: #2d2d2d;
  --text-color: #f4f4f4;
  --primary-color: #ff8a80;
  --primary-hover: #ff5252;
  --border-color: #444;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

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

.container {
  background-color: var(--container-bg);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: var(--shadow);
  text-align: center;
  max-width: 400px;
  width: 90%;
  position: relative;
}

.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

h1 {
  color: var(--primary-color);
}

.input-container {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input[type="date"] {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--container-bg);
  color: var(--text-color);
}

button {
  padding: 0.5rem 1rem;
  border: none;
  background-color: var(--primary-color);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

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

#fortune-result {
  margin-top: 1.5rem;
  font-size: 1.1rem;
  min-height: 50px;
  line-height: 1.5;
}