/* =========================================================
   Form（入力フォーム共通パーツ）
========================================================= */

.form-group + .form-group {
  margin-top: 64px;
}

/* 項目のまとまりの見出し */
.form-group__title {
  padding-bottom: 16px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--color-accent);
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.form-field + .form-field {
  margin-top: 32px;
}

/* 横2列（氏名とふりがな など）。スマホでは1列 */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 24px;
}

.form-row + .form-field,
.form-field + .form-row,
.form-row + .form-row {
  margin-top: 32px;
}

/* 横並びの中では縦の余白をかけない（右側の項目が下にずれるのを防ぐ） */
.form-row > .form-field + .form-field {
  margin-top: 0;
}

/* ---------- Label ---------- */
.form-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

.form-badge {
  flex-shrink: 0;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.form-badge--required {
  background: var(--color-primary);
  color: var(--color-white);
}

.form-badge--optional {
  background: var(--color-sub);
  color: var(--color-text-sub);
}

.form-help {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-sub);
}

/* ---------- Input ---------- */
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  height: 54px;
  padding: 0 18px;
  border: 1px solid var(--color-input-border);
  border-radius: 12px;
  background: var(--color-white);
  color: var(--color-text);
  font: inherit;
  font-size: 16px; /* iOSで拡大されないよう16px以上 */
  letter-spacing: 0.04em;
  transition: border-color var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #9AA4AF;
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-accent);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(12, 67, 136, 0.12);
}

.form-textarea {
  height: 160px;
  padding: 14px 18px;
  line-height: 1.8;
  resize: vertical;
}

/* select：独自の矢印 */
.form-select {
  padding-right: 48px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 6l5 5 5-5' fill='none' stroke='%230C4388' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  background-size: 14px;
  cursor: pointer;
}

.form-select:invalid {
  color: #9AA4AF;
}

.form-select option {
  color: var(--color-text);
}

/* 年齢など短い入力 */
.form-input--short {
  max-width: 160px;
}

/* 文字数カウンター */
.form-counter {
  margin-top: 6px;
  font-size: 12px;
  text-align: right;
  color: var(--color-text-sub);
}

/* ---------- Checkbox ---------- */
.form-check {
  display: inline-flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  line-height: 1.7;
  cursor: pointer;
}

.form-check input {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin: 2px 0 0;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-check a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Error ---------- */
.form-error {
  display: none;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-error);
}

.form-field.is-invalid .form-error {
  display: block;
}

.form-field.is-invalid .form-input,
.form-field.is-invalid .form-select,
.form-field.is-invalid .form-textarea {
  border-color: var(--color-error);
}

.form-field.is-invalid .form-input:focus,
.form-field.is-invalid .form-select:focus,
.form-field.is-invalid .form-textarea:focus {
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
}

@media (max-width: 767px) {
  .form-group + .form-group {
    margin-top: 52px;
  }

  .form-group__title {
    margin-bottom: 28px;
    font-size: 19px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .form-field + .form-field,
  .form-row + .form-field,
  .form-field + .form-row,
  .form-row + .form-row {
    margin-top: 28px;
  }

  .form-input,
  .form-select {
    height: 52px;
  }
}