:root {
  /* Light Theme Variables */
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --input-border: #ced4da;
  --btn-bg: #007bff;
  --btn-text: #ffffff;
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  /* Dark Theme Variables */
  --bg-color: #121212;
  --text-color: #e9ecef;
  --card-bg: #1e1e1e;
  --input-bg: #2b2b2b;
  --input-border: #444444;
  --btn-bg: #375a7f;
  --btn-text: #ffffff;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100vh;
  margin: 0;
  padding-top: 80px;
}

h1 { margin-bottom: 10px; }
p { margin-bottom: 30px; color: #6c757d; }

.contact-section {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  width: 90%;
  max-width: 500px;
  transition: background-color var(--transition-speed);
}

.contact-section h2 {
  margin-top: 0;
  margin-bottom: 20px;
  text-align: center;
}

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

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 600;
}

.form-group input, 
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background-color: var(--input-bg);
  color: var(--text-color);
  box-sizing: border-box; /* Ensure padding doesn't affect width */
  font-family: inherit;
}

.submit-btn {
  width: 100%;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.submit-btn:hover {
  opacity: 0.9;
}

#theme-toggle {
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--input-border);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
}