.complex_form {
  margin-top: 20px;
  border-radius: 10px;
  border: 2px solid #3c3d3f;
  padding: 20px 15px;
  display: flex;
  flex-direction: column;
  background-color: #fafafa;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.complex_form .form_header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.complex_form .form_title {
  font-size: 22px;
  font-weight: bold;
  margin: 0;
  padding: 10px 20px;
  color: #fff;
  background-color: #3c3d3f;
  border-radius: 8px 8px 0 0;
}

.complex_form .form_body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 1000px;
  opacity: 1;
  overflow: hidden;
  padding: 10px 0;
  transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
  box-sizing: border-box;
}

.complex_form .form_body.minimized {
  max-height: 0;
  opacity: 0;
  padding: 0;
}

.complex_form .form_element {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: 18px;
  border-radius: 8px;
  border: 1px solid #ccc;
  box-sizing: border-box;
  margin-bottom: 10px;
}

.btn {
  border-radius: 10px;
  text-align: center;
  font-size: 18px;
  color: #3c3d3f;
  background: #ffffff;
  border: 2px solid #3c3d3f;
  padding: 10px 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  background: #3c3d3f;
  color: #ffffff;
  transform: scale(1.03);
}

.minimize_btn {
  background: #000;
  color: #fff;
  font-size: 18px;
  border: none;
  cursor: pointer;
  align-self: flex-end;
  padding: 6px 12px;
  border-radius: 6px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.minimize_btn:hover {
  background: #333;
  transform: scale(1.05);
}