/* ===========================
 * Contact Page — Base
 * =========================== */
.contact-main {
  background: var(--color-white);
}

.contact-section {
  padding: 80px 0;
}

.contact-section:nth-child(even) {
  background: var(--color-bg);
}

/* ===========================
 * Lead Message
 * =========================== */
.contact-lead {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 24px 0;
}

.contact-lead__text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* ===========================
 * Form Section
 * =========================== */
.contact-section.contact-form-section {
  background: var(--color-white);
}

/* ===========================
 * Form Card
 * =========================== */
.form-card {
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 48px;
  max-width: 780px;
  margin: 0 auto;
  animation: fadeSlideUp 0.5s ease both;
}

.form-card__note {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}

/* ===========================
 * Form Elements（共通）
 * =========================== */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 0;
}

.form-group {
  margin-bottom: 24px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-required {
  color: #d32f2f;
  font-size: 0.85rem;
  font-weight: 700;
}

.form-optional {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  letter-spacing: 0.04em;
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem; /* iOS Safariの自動ズーム防止: 16px以上が必要 */
  font-family: var(--font-body);
  color: var(--color-text);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(var(--color-secondary-rgb), 0.12);
}

.form-input--error,
.form-select.form-input--error,
.form-textarea.form-input--error {
  border-color: #d32f2f;
  box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.1);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23777' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-textarea {
  resize: vertical;
  min-height: 160px;
  line-height: 1.8;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 6px;
  line-height: 1.6;
}

.form-field-error {
  display: block;
  font-size: 0.8rem;
  color: #d32f2f;
  margin-top: 6px;
  line-height: 1.5;
}

/* ラジオボタングループ */
.form-fieldset {
  border: none;
  padding: 0;
  margin: 0 0 24px;
}

.form-fieldset .form-label {
  margin-bottom: 12px;
}

.form-hint--lead {
  margin-top: -4px;
  margin-bottom: 12px;
}

.form-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-radio-group--grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.form-radio {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--color-text);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.form-radio:hover {
  border-color: rgba(var(--color-secondary-rgb), 0.5);
  background: rgba(var(--color-secondary-rgb), 0.03);
}

.form-radio input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: border-color 0.2s, background 0.2s;
}

.form-radio input[type="radio"]:checked {
  border-color: var(--color-secondary);
}

.form-radio input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  transform: translate(-50%, -50%);
}

.form-radio input[type="radio"]:focus-visible {
  outline: 2px solid rgba(var(--color-secondary-rgb), 0.4);
  outline-offset: 2px;
}

.form-radio:has(input[type="radio"]:checked) {
  border-color: var(--color-secondary);
  background: rgba(var(--color-secondary-rgb), 0.06);
}

.form-fieldset--error .form-radio {
  border-color: rgba(211, 47, 47, 0.4);
}

.form-fieldset--error .form-label {
  color: #d32f2f;
}

/* チェックボックス */
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text);
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  background: #fff;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}

.form-checkbox input[type="checkbox"]:checked {
  border-color: var(--color-secondary);
  background: var(--color-secondary);
}

.form-checkbox input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 8px;
  height: 12px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg);
}

.form-checkbox a {
  color: var(--color-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-checkbox a:hover {
  opacity: 0.8;
}

/* プライバシーポリシー */
.form-group--privacy {
  padding: 20px;
  background: rgba(var(--color-primary-rgb), 0.03);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

/* 送信ボタン */
.form-group--submit {
  text-align: center;
  margin-top: 8px;
}

.form-group--submit .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 260px;
}

.form-group--submit .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===========================
 * Form Notice
 * =========================== */
.form-notice {
  padding: 20px 24px;
  border-radius: var(--radius);
  margin-bottom: 28px;
}

.form-notice--success {
  background: rgba(var(--color-secondary-rgb), 0.08);
  border: 1px solid rgba(var(--color-secondary-rgb), 0.3);
}

.form-notice--error {
  background: rgba(211, 47, 47, 0.06);
  border: 1px solid rgba(211, 47, 47, 0.3);
}


.form-notice__title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 8px;
}

.form-notice--success .form-notice__title {
  color: var(--color-secondary);
}

.form-notice--error .form-notice__title {
  color: #d32f2f;
}

.form-notice__text {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-text);
}

.form-notice__text small {
  font-size: 0.82rem;
  color: var(--color-text-light);
  display: block;
  margin-top: 8px;
}

.form-notice__list {
  list-style: disc;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 2;
}

/* ===========================
 * Animation
 * =========================== */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===========================
 * Responsive
 * =========================== */
@media (max-width: 768px) {
  .form-card {
    padding: 32px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-radio-group--grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .contact-section {
    padding: 56px 0;
  }

  .form-card {
    padding: 24px 16px;
  }

  .form-radio-group--grid {
    grid-template-columns: 1fr;
  }

  .form-group--submit .btn {
    width: 100%;
    min-width: unset;
  }
}