:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --container-bg: #f8f9fa;
  --button-bg: #007bff;
  --button-text: #ffffff;
  --lotto-number-bg: #ffc107;
  --lotto-number-text: #000000;
}

[data-theme='dark'] {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --container-bg: #1e1e1e;
  --button-bg: #375a7f;
  --button-text: #ffffff;
  --lotto-number-bg: #fd7e14;
  --lotto-number-text: #ffffff;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  padding: 2rem 0;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  background-color: var(--container-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: background-color 0.3s;
  width: 90%;
  max-width: 600px;
}

h1 {
  margin-bottom: 1.5rem;
}

.lotto-numbers {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 1.5rem;
  min-height: 50px;
}

.number-circle {
  width: 50px;
  height: 50px;
  background-color: var(--lotto-number-bg);
  color: var(--lotto-number-text);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-size: 1.2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

button {
  padding: 10px 20px;
  font-size: 1rem;
  cursor: pointer;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 6px;
  transition: background-color 0.3s;
}

button:hover {
  opacity: 0.9;
}

#theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: 1px solid var(--text-color);
  color: var(--text-color);
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 4px;
}

.contact-section {
  margin-top: 2rem;
  text-align: left;
}

.contact-section hr {
  border: 0;
  border-top: 1px solid #ddd;
  margin: 1.5rem 0;
}

.contact-section h3 {
  margin-bottom: 1rem;
  text-align: center;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  background-color: var(--bg-color);
  color: var(--text-color);
  box-sizing: border-box;
}

.form-group textarea {
  height: 100px;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  background-color: #28a745 !important;
}