:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --btn-bg: #eeeeee;
  --btn-text: #333333;
  --transition-speed: 0.3s;
}

body.dark-mode {
  --bg-color: #1a1a1a;
  --text-color: #f0f0f0;
  --btn-bg: #333333;
  --btn-text: #f0f0f0;
}

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

button {
  padding: 10px 20px;
  cursor: pointer;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid #ccc;
  border-radius: 5px;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

#theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
}

.contact-section {
  margin-top: 40px;
  width: 100%;
  max-width: 400px;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background-color: var(--btn-bg);
}

.form-group {
  margin-bottom: 15px;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
  background-color: var(--bg-color);
  color: var(--text-color);
}

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