.contact-form {
  max-width: 680px;
  margin: 20px auto;
  padding: 20px;
  background: rgba(0,0,0,0);
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0);
}

.contact-form label {
  display: block;
  margin-top: 10px;
  font-weight: 600;
}

.contact-form input {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
  box-sizing: border-box;
}

.contact-form button {
  margin-top: 15px;
  padding: 10px 20px;
  background: #0073aa;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.contact-form button:hover {
  background: #005f8d;
}

.contact-message {
  margin-top: 15px;
  color: #00c853;
  font-weight: bold;
}

/* Layout */
.form-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.form-group { flex: 1 1 100%; }

.form-group.half { flex: 1 1 50%; }

.form-group.third { flex: 1 1 33%; }

.form-group.two-thirds { flex: 1 1 66%; }

/* Mobile fallback */
@media (max-width: 640px) {
  .form-row { flex-wrap: wrap; }
  .form-group.half,
  .form-group.third,
  .form-group.two-thirds { flex: 1 1 100%; }
}