/* ===== Step Form Component ===== */
/* c-step-form: マルチステップフォーム（FLOCSS Component） */

/* ---------- Progress Bar ---------- */
.c-step-form__progress {
  margin-block-end: var(--space-lg, 2rem);
  padding-block: var(--space-md, 1rem);
}

.c-step-form__progress-track {
  block-size: 4px;
  background: var(--color-border-light);
  border-radius: 2px;
  margin-block-end: var(--space-sm, 0.75rem);
  overflow: hidden;
}

.c-step-form__progress-bar {
  block-size: 100%;
  inline-size: 25%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: inline-size 0.3s ease;
}

.c-step-form__progress-labels {
  display: flex;
  justify-content: space-between;
}

.c-step-form__progress-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  font-size: clamp(0.625rem, 0.5rem + 0.5vw, 0.75rem);
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color 0.3s ease;
}

.c-step-form__progress-label.is-active {
  color: var(--color-text-main);
}

.c-step-form__progress-label.is-current {
  font-weight: 700;
}

.c-step-form__progress-num {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 1.75rem;
  block-size: 1.75rem;
  border-radius: 50%;
  background: var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  transition: background 0.3s ease, color 0.3s ease;
}

.c-step-form__progress-label.is-active .c-step-form__progress-num {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* ---------- Step Fieldset ---------- */
.c-step-form__step {
  border: none;
  padding: 0;
  margin: 0;
  min-inline-size: 0;
}

.c-step-form__legend {
  display: flex;
  align-items: center;
  gap: var(--space-xs, 0.5rem);
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  font-weight: 700;
  color: var(--color-text-main);
  padding-block-end: var(--space-sm, 0.75rem);
  margin-block-end: var(--space-md, 1.5rem);
  border-block-end: 2px solid var(--color-primary);
  inline-size: 100%;
}

.c-step-form__step-icon {
  color: var(--color-primary);
  font-size: 1.5rem;
}

/* ---------- Form Groups ---------- */
.c-step-form__group {
  margin-block-end: var(--space-md, 1.5rem);
}

.c-step-form__label {
  display: flex;
  align-items: center;
  gap: var(--space-xs, 0.5rem);
  margin-block-end: var(--space-xs, 0.5rem);
  font-weight: 600;
  color: var(--color-text-main);
}

.c-step-form__required {
  font-size: 0.625rem;
  padding: 0.1rem 0.4rem;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-radius: 3px;
  font-weight: 700;
}

/* Input styling (piggyback on existing rct-form__input class from widgets) */
.c-step-form .rct-form__input,
.c-step-form .rct-form__textarea {
  inline-size: 100%;
  padding: 0.875rem;
  border: 2px solid var(--color-border-light);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background: var(--color-surface);
}

.c-step-form .rct-form__input:focus,
.c-step-form .rct-form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.c-step-form__group--error .rct-form__input,
.c-step-form__group--error .rct-form__textarea {
  border-color: var(--color-error);
}

.c-step-form__error {
  font-size: 0.85rem;
  color: var(--color-error);
  margin-block-start: 0.25rem;
}

.c-step-form__help {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-block-start: 0.25rem;
}

/* ---------- Preview ---------- */
.c-step-form__preview {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: 0.75rem;
  padding: var(--space-md, 1.5rem);
  margin-block-end: var(--space-md, 1.5rem);
}

.c-step-form__preview-list {
  display: grid;
  gap: 0;
}

.c-step-form__preview-label {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-block-start: 0.75rem;
}

.c-step-form__preview-value {
  margin: 0;
  padding-block: 0.25rem 0.75rem;
  border-block-end: 1px solid var(--color-border-light);
  color: var(--color-text-main);
  word-break: break-all;
  white-space: pre-wrap;
}

.c-step-form__preview-value:last-child {
  border-block-end: none;
}

/* ---------- Privacy ---------- */
.c-step-form__privacy-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs, 0.5rem);
  cursor: pointer;
  font-weight: 600;
}

.c-step-form__privacy-label input[type="checkbox"] {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* ---------- Navigation ---------- */
.c-step-form__nav {
  display: flex;
  gap: var(--space-sm, 0.75rem);
  margin-block-start: var(--space-lg, 2rem);
  flex-direction: column;
}

.c-step-form__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding-block: 0.875rem;
  padding-inline: 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
  min-block-size: 3rem;
}

.c-step-form__btn--next {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  order: -1;
}

.c-step-form__btn--next:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.c-step-form__btn--prev {
  background: var(--color-surface);
  color: var(--color-text-main);
  border: 2px solid var(--color-border-light);
}

.c-step-form__btn--prev:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.c-step-form__btn--submit {
  background: var(--color-success);
  color: var(--color-text-on-primary);
  order: -1;
}

.c-step-form__btn--submit:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.c-step-form__btn .material-symbols-outlined {
  font-size: 1.25rem;
}

/* ---------- Complete (success state) ---------- */
.c-step-form__complete-info {
  margin-block-start: var(--space-md, 1.5rem);
  padding: var(--space-md, 1.5rem);
  background: var(--color-surface);
  border-radius: 0.75rem;
}

.c-step-form__complete-title {
  font-size: 1rem;
  font-weight: 700;
  margin-block-end: var(--space-sm, 0.75rem);
}

/* ---------- Wearable (≤279px) ---------- */
@media screen and (max-width: 279px) {
  .c-step-form__progress {
    display: none;
  }

  .c-step-form__fieldset {
    padding: var(--space-watch-sm, 0.25rem);
  }

  .c-step-form__nav {
    flex-direction: column;
    gap: var(--space-watch-sm, 0.25rem);
  }

  .c-step-form__btn {
    font-size: var(--font-watch-md, 0.8125rem);
    width: 100%;
  }

  .c-step-form__preview {
    font-size: var(--font-watch-sm, 0.6875rem);
  }
}

.c-step-form__complete-flow {
  padding-inline-start: 1.5rem;
  margin-block-end: var(--space-sm, 0.75rem);
  line-height: 2;
}

.c-step-form__complete-contact {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.c-step-form__complete-contact a {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: none;
}

/* ---------- Responsive ---------- */
@media (min-width: 480px) {
  .c-step-form__nav {
    flex-direction: row;
    justify-content: center;
  }

  .c-step-form__btn--next,
  .c-step-form__btn--submit {
    order: 0;
  }

  .c-step-form__btn {
    flex: 0 1 auto;
    min-inline-size: 10rem;
  }
}

@media (min-width: 768px) {
  .c-step-form__progress-num {
    inline-size: 2rem;
    block-size: 2rem;
    font-size: 0.875rem;
  }

  .c-step-form__legend {
    font-size: 1.375rem;
  }
}