:root {
  --card-bg: #ffffff;
  --card-header-bg: #f5f5f5;
  --card-text: #333;
  --btn-primary: #4a90e2;
  --btn-cancel: #e74c3c;
  --btn-text: #fff;
  --border-radius: 12px;
  --form-gap: 1.5rem;
}

html.dark {
  --card-bg: #1e1e2f;
  --card-header-bg: #2c2c3c;
  --card-text: #f0f0f0;
  --btn-primary: #3498db;
  --btn-cancel: #c0392b;
  --btn-text: #fff;
}

.form-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 2rem;
  margin: auto;
  max-width: 700px;
}

.form-card__header {
  background-color: var(--card-header-bg);
  padding: 1rem 2rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  border-bottom: 1px solid #ccc;
}

.form-card__title {
  margin: 0;
  font-size: 1.6rem;
  color: var(--card-text);
}

.form-card__body {
  padding: 2rem;
  color: var(--card-text);
}

.form__buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: var(--form-gap);
}

.form__button {
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
  color: var(--btn-text);
}

.form__button--submit {
  background-color: var(--btn-primary);
}

.form__button--submit:hover {
  background-color: #3d49f0;
}

.form__button--cancel {
  background-color: var(--btn-cancel);
}

.form__button--cancel:hover {
  background-color: #da1919;
}