/* ==========================================================================
   Contact Form Section
   ========================================================================== */

.contactform-section {
  padding: 0 var(--pad-inline) clamp(48px, 7vw, 80px);
}

.contactform-container {
  max-width: var(--container);
  margin: 0 auto;
}

/* Step indicator */

.contactform-steps {
  list-style: none;
  display: flex;
  margin: 0 0 clamp(28px, 4vw, 40px);
  padding: 0;
}

.contactform-step {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1.5vw, 16px);
  height: clamp(48px, 6vw, 60px);
  background-color: #96B6E5;
  color: var(--color-white);
  font-weight: 700;
  font-size: clamp(14px, 1.4vw, 17px);
  letter-spacing: 0.1em;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 50%, calc(100% - 22px) 100%, 0 100%, 22px 50%);
}

.contactform-step:first-child {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 50%, calc(100% - 22px) 100%, 0 100%);
}

.contactform-step:not(:first-child) {
  margin-left: -20px;
}

.contactform-step:nth-child(2) {
  background-color: #6099ED;
}

.contactform-step--active {
  background-color: var(--color-navy);
}

.contactform-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(20px, 2vw, 24px);
  height: clamp(20px, 2vw, 24px);
  background-color: #ffffff;
  color: #16264a;
  font-size: clamp(12px, 1.1vw, 14px);
  font-weight: 700;
}

/* Lead text */

.contactform-lead {
  text-align: center;
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.9;
  margin: 0 0 clamp(28px, 4vw, 40px);
}

/* Form table */

.contactform-form {
  background-color: var(--color-white);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.contactform-row {
  display: grid;
  grid-template-columns: minmax(140px, 340px) 1fr;
  border-bottom: 1px solid var(--color-bg-gray);
}

.contactform-row:last-child {
  border-bottom: none;
}

.contactform-label {
  background-color: var(--color-navy);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: clamp(20px, 2.5vw, 30px) clamp(24px, 3vw, 40px);
}

.contactform-required {
  display: inline-block;
  align-self: flex-start;
  background-color: var(--color-white);
  color: var(--color-red);
  font-size: clamp(11px, 1vw, 12px);
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 3px 8px;
}

.contactform-label-text {
  font-weight: 700;
  font-size: clamp(15px, 1.4vw, 17px);
  letter-spacing: 0.03em;
}

.contactform-field {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: clamp(20px, 2.5vw, 30px) clamp(24px, 3vw, 40px);
}

.contactform-input,
.contactform-select,
.contactform-textarea {
  width: 100%;
  box-sizing: border-box;
  background-color: var(--color-bg-gray);
  border: 1px solid var(--color-bg-gray);
  border-radius: 2px;
  color: #16264a;
  font-family: inherit;
  font-size: clamp(14px, 1.3vw, 16px);
  padding: clamp(12px, 1.6vw, 16px);
  outline: none;
}

.contactform-input::placeholder,
.contactform-textarea::placeholder {
  color: var(--color-gray);
}

.contactform-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath fill='%2316264a' d='M0 0l6 8 6-8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 11px 7px;
}

.contactform-textarea {
  min-height: clamp(140px, 16vw, 200px);
  resize: vertical;
}

.contactform-input:focus,
.contactform-select:focus,
.contactform-textarea:focus {
  border-color: var(--color-navy);
}

.contactform-hint {
  margin: 0;
  color:  var(--color-navy-light);
  font-size: clamp(12px, 1.1vw, 13px);
  font-weight: 700;
}

/* Privacy agreement */

.contactform-privacy-text {
  text-align: center;
  font-weight: 700;
  font-size: clamp(14px, 1.4vw, 17px);
  line-height: 1.9;
  margin: clamp(32px, 4.5vw, 44px) 0 clamp(20px, 3vw, 28px);
}

.contactform-privacy-link {
  color: var(--color-navy);
  text-decoration: none;
}

.contactform-privacy-link:hover {
  text-decoration: underline;
}

.contactform-checkbox {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  margin-bottom: clamp(36px, 5vw, 52px);
}

.contactform-checkbox-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.contactform-checkbox-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--color-white);
  color:  var(--color-gray);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.contactform-checkbox-input:checked + .contactform-checkbox-box {
  background-color: var(--color-navy);
  color: #ffffff;
}

.contactform-checkbox-text {
  color: #1a1a1a;
  font-weight: 700;
  font-size: clamp(15px, 1.4vw, 18px);
}

/* Submit button */

.contactform-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 2.5vw, 24px);
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  background-color: var(--color-ink);
  color:var(--color-white);
  border: none;
  cursor: pointer;
  padding: clamp(16px, 2.2vw, 20px);
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 18px);
  letter-spacing: 0.1em;
  transition: background-color 0.15s ease;
}

.contactform-submit:hover {
  background-color: var(--color-gray);
}

.contactform-submit-arrow {
  flex-shrink: 0;
}

/* ==========================================================================
   Responsive breakpoints
   ========================================================================== */

@media (width <= 1024px) {
  .contactform-row {
    grid-template-columns: minmax(120px, 260px) 1fr;
  }
}

@media (width <= 760px) {
  .contactform-steps {
    gap: 4px;
  }

  .contactform-step {
    font-size: 13px;
    gap: 6px;
  }

  .contactform-row {
    grid-template-columns: 1fr;
  }

  .contactform-label {
    padding: 16px clamp(20px, 4vw, 28px);
    flex-direction: row;
    align-items: center;
  }

  .contactform-field {
    padding: 18px clamp(20px, 4vw, 28px) 22px;
  }

  .contactform-privacy-text br {
    display: none;
  }
}

@media (width <= 420px) {
  .contactform-step-label {
    letter-spacing: 0.02em;
  }

  .contactform-step {
    font-size: 12px;
  }

  .contactform-lead {
    font-size: 14px;
  }

  .contactform-label-text {
    font-size: 14px;
  }

  .contactform-input,
  .contactform-select,
  .contactform-textarea {
    font-size: 13px;
  }

  .contactform-checkbox-text {
    font-size: 14px;
  }

  .contactform-submit {
    font-size: 14px;
  }
}

/* ==========================================================================
   追加分：確認画面・完了画面・入力エラー表示
   ========================================================================== */

/* ステップインジケータ（段階に応じて塗り分け） */
.contactform-step.is-done {
  background-color: #6099ED;
}

.contactform-step.is-active {
  background-color: var(--color-navy);
}

/* --- エラー表示 --- */

.contactform-error-summary {
  background-color: #fff;
  border-left: 5px solid var(--color-red);
  padding: clamp(18px, 2.4vw, 24px) clamp(20px, 3vw, 28px);
  margin: 0 0 clamp(24px, 3.5vw, 32px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.contactform-error-summary-title {
  color: var(--color-red);
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 17px);
  margin: 0 0 10px;
}

.contactform-error-summary ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: clamp(13px, 1.3vw, 15px);
}

.contactform-error {
  color: var(--color-red);
  font-size: clamp(12px, 1.2vw, 14px);
  font-weight: 700;
  margin: 0;
}

.contactform-input.is-error,
.contactform-select.is-error,
.contactform-textarea.is-error {
  border-color: var(--color-red);
  background-color: #fff5f3;
}

/* --- 確認画面の表示値 --- */

.contactform-confirm-value {
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 1.9;
  word-break: break-all;
  margin: 0;
}

.contactform-confirm-value--empty {
  color: var(--color-gray);
}

/* --- ボタン列（戻る／送信する） --- */

.contactform-actions {
  display: flex;
  justify-content: center;
  gap: clamp(12px, 2vw, 24px);
  margin-top: clamp(36px, 5vw, 52px);
  flex-wrap: wrap;
}

.contactform-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 20px);
  width: 100%;
  max-width: 320px;
  padding: clamp(16px, 2.2vw, 20px);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 18px);
  letter-spacing: 0.1em;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.contactform-btn--primary {
  background-color: var(--color-ink);
  color: var(--color-white);
}

.contactform-btn--primary:hover {
  background-color: var(--color-gray);
}

.contactform-btn--back {
  background-color: var(--color-white);
  color: var(--color-ink);
  box-shadow: inset 0 0 0 2px var(--color-ink);
}

.contactform-btn--back:hover {
  background-color: var(--color-gray);
}

.contactform-btn--back img {
  transform: scaleX(-1);
}

/* --- 完了画面 --- */

.contactform-complete {
  background-color: var(--color-white);
  text-align: center;
  padding: clamp(40px, 6vw, 72px) clamp(24px, 4vw, 48px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  border-top: 5px solid;
  border-image: linear-gradient(90deg, var(--color-red), var(--color-navy)) 1;
}

.contactform-complete-title {
  font-family: var(--font-title);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--color-navy);
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.contactform-complete-text {
  font-size: clamp(14px, 1.4vw, 17px);
  line-height: 2;
  margin: 0 0 clamp(28px, 4vw, 40px);
}

.contactform-complete .contactform-btn {
  margin: 0 auto;
}

@media (width <= 760px) {
  .contactform-actions {
    flex-direction: column-reverse;
    align-items: center;
  }

  .contactform-btn {
    max-width: 100%;
  }
}