/* ============================================================
   component: purchase-form
   申込フォーム（purchase/index.html）専用。
   同梱の小コンポーネント: step-indicator / consent-box / checks /
   fieldset / field / alert / summary / signature-preview
   ============================================================ */

.purchase__inner { max-width: 780px; }

.purchase__lead {
  margin-top: clamp(20px, 2.4vw, 28px);
  font-size: var(--fs-lead);
  line-height: 1.95;
}

/* ---- step-indicator ---------------------------------------- */
.step-indicator {
  display: flex;
  gap: 4px;
  margin-top: clamp(32px, 4vw, 48px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.step-indicator__item {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 10px;
  padding-block: 14px;
  color: var(--c-muted);
}

.step-indicator__num {
  display: grid;
  place-items: center;
  flex: none;
  width: 24px;
  height: 24px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-en);
  font-size: var(--fs-small);
  line-height: 1;
}

.step-indicator__label {
  font-size: var(--fs-small);
  line-height: 1.4;
}

.step-indicator__item.is-current {
  color: var(--c-ink);
  font-weight: 700;
}

.step-indicator__item.is-current .step-indicator__num {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

.step-indicator__item.is-done { color: var(--c-ink-soft); }

/* ---- purchase-form ----------------------------------------- */
.purchase-form__step { margin-top: clamp(36px, 4.5vw, 56px); }

.purchase-form__step-title {
  font-family: var(--font-jp);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.45;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-accent);
}

.purchase-form__lead,
.purchase-form__required-note { margin-top: 20px; }

.purchase-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 3.5vw, 40px);
}

/* 「戻る」を左、主ボタンを右に寄せる */
.purchase-form__actions .btn--outline { margin-right: auto; }

.req {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  border-radius: 2px;
  background: #b3261e;
  color: #fff;
  font-family: var(--font-en);
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.02em;
  vertical-align: 2px;
}

/* ---- consent-box ------------------------------------------- */
.consent-box {
  height: min(460px, 60vh);
  margin-top: 24px;
  padding: clamp(20px, 2.6vw, 32px);
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--c-surface-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: var(--fs-small);
  line-height: 1.95;
}

.consent-box:focus-visible { outline: 2px solid var(--c-ink); outline-offset: 2px; }

.consent-box__intro { margin-bottom: 8px; }

.consent-box__article {
  margin-top: 22px;
  margin-bottom: 2px;
  font-family: var(--font-jp);
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.5;
}

.consent-box__note {
  margin-top: 10px;
  font-size: var(--fs-small);
  color: var(--c-muted);
}

.consent-box__note.is-cleared { color: #1e7a3c; }

/* ---- checks ------------------------------------------------ */
.checks {
  margin: 24px 0 0;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.checks[disabled] { opacity: 0.45; }

.checks__legend {
  padding-inline: 8px;
  font-family: var(--font-jp);
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--c-ink);
}

.check {
  display: flex;
  gap: 12px;
  padding-block: 10px;
  cursor: pointer;
}

.checks[disabled] .check { cursor: default; }

.check + .check { border-top: 1px solid var(--c-line-soft); }

.check input[type="checkbox"] {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--c-accent);
  cursor: inherit;
}

.check__text { line-height: 1.8; }

/* ---- fieldset / field -------------------------------------- */
.fieldset {
  margin: 28px 0 0;
  padding: 0;
  border: none;
}

.fieldset__legend {
  width: 100%;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--c-line);
  font-family: var(--font-jp);
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--c-ink);
}

.field { margin-top: 22px; }

.field--narrow { max-width: 260px; }

.field__label {
  display: block;
  margin-bottom: 7px;
  font-weight: 700;
  color: var(--c-ink-soft);
}

.field__control {
  display: block;
  width: 100%;
  min-height: 46px;
  padding: 11px 14px;
  background: var(--c-surface);
  border: 1px solid #b9bcbf;
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 1rem;          /* iOS の自動ズーム回避のため 16px 以上 */
  line-height: 1.6;
}

textarea.field__control { min-height: auto; resize: vertical; }

select.field__control {
  appearance: none;
  padding-right: 40px;
  background-image: linear-gradient(45deg, transparent 50%, var(--c-ink-soft) 50%),
                    linear-gradient(135deg, var(--c-ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.field__control:focus {
  outline: 2px solid var(--c-ink);
  outline-offset: 0;
  border-color: var(--c-ink);
}

.field__control.is-invalid { border-color: #b3261e; background: #fdf6f5; }

.field__control--signature {
  font-family: var(--font-jp);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
}

.field__help {
  margin-top: 6px;
  font-size: var(--fs-small);
  color: var(--c-muted);
  line-height: 1.75;
}

.field__error {
  margin-top: 6px;
  font-size: var(--fs-small);
  color: #b3261e;
  line-height: 1.75;
}

/* ---- price-preview ----------------------------------------- */
.price-preview {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding: 16px 20px;
  background: var(--c-surface-alt);
  border-radius: var(--radius);
}

.price-preview__label { font-weight: 700; color: var(--c-ink-soft); }

.price-preview__amount {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1;
}

/* ---- signature-preview ------------------------------------- */
.signature-preview { margin-top: 22px; }

.signature-preview__label {
  display: block;
  margin-bottom: 7px;
  font-size: var(--fs-small);
  color: var(--c-muted);
}

.signature-preview__canvas {
  width: 100%;
  max-width: 360px;
  height: auto;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

/* ---- alert -------------------------------------------------- */
.alert {
  margin-top: 22px;
  padding: 16px 20px;
  border-left: 3px solid;
  border-radius: var(--radius);
  font-size: var(--fs-small);
  line-height: 1.85;
}

.alert__title { font-weight: 700; }

.alert__list { margin: 6px 0 0; padding-left: 1.2em; list-style: disc; }

.alert--info  { background: #f1f4f7; border-color: #5b7183; }
.alert--warn  { background: #fdf6ec; border-color: #b8860b; }
.alert--error { background: #fdf3f2; border-color: #b3261e; }

/* ---- turnstile ---------------------------------------------- */
/* ウィジェットは Cloudflare が iframe で描画する。幅は固定なので
   狭い画面ではみ出さないよう、包む側で折り返しを許す。 */
.turnstile {
  margin-top: 24px;
  max-width: 100%;
  overflow-x: auto;
}

/* ---- summary ------------------------------------------------ */
.summary {
  margin: 24px 0 0;
  border-top: 1px solid var(--c-line);
}

.summary__row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 8px 20px;
  padding-block: 14px;
  border-bottom: 1px solid var(--c-line-soft);
}

.summary__key {
  margin: 0;
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--c-ink-soft);
}

.summary__val {
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.summary__val--empty { color: var(--c-muted); }

/* 送信中はフォーム全体の操作を止める */
.purchase-form.is-submitting { pointer-events: none; opacity: 0.6; }

/* ---- responsive --------------------------------------------- */
@media (max-width: 720px) {
  .step-indicator { flex-direction: column; gap: 0; }

  .step-indicator__item { padding-block: 10px; }

  .step-indicator__item + .step-indicator__item {
    border-top: 1px solid var(--c-line-soft);
  }

  .summary__row { grid-template-columns: 1fr; gap: 2px; padding-block: 12px; }

  .purchase-form__actions .btn { width: 100%; }
  .purchase-form__actions .btn--outline { margin-right: 0; order: 2; }
}