/* ======================================================
   Contact ページ固有スタイル
====================================================== */

/* ---- Page Hero ---- */
.contact-hero {
  padding: 160px 0 80px;
  position: relative;
  overflow: hidden;
}
.contact-hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.contact-hero .page-hero-label {
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.1s forwards;
}
.contact-hero-en {
  font-family: var(--font-en-heading);
  font-size: clamp(52px, 6vw, 84px);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: 0.01em;
  color: var(--charcoal);
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.2s forwards;
}
.contact-hero-en em {
  font-style: italic;
  color: var(--teal);
}
.contact-hero-ja {
  font-family: var(--font-ja-heading);
  font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 400;
  color: var(--mid-gray);
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.3s forwards;
}
.contact-hero-desc {
  font-size: 17px;
  line-height: 1.85;
  color: var(--charcoal);
  max-width: 620px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.4s forwards;
}

/* ---- タブ ---- */
.contact-section {
  padding: 0 0 var(--section-gap);
}
.contact-tabs-wrap {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 72px;
  z-index: 10;
}
.contact-tabs {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.contact-tabs::-webkit-scrollbar { display: none; }
.tab-btn {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--mid-gray);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 18px 24px 15px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
  position: relative;
  bottom: -2px;
}
.tab-btn:hover { color: var(--teal); }
.tab-btn.active {
  color: var(--teal);
  border-bottom-color: var(--teal);
  font-weight: 600;
}

/* ---- タブコンテンツ ---- */
.tab-panel {
  display: none;
  max-width: 780px;
  margin: 0 auto;
  padding: 64px var(--gutter) 0;
}
.tab-panel.active { display: block; }

.tab-panel-head {
  margin-bottom: 48px;
}
.tab-panel-head h2 {
  font-family: var(--font-ja-heading);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: 12px;
}
.tab-panel-head p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--mid-gray);
  max-width: 560px;
}

/* ---- フォーム ---- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group label {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--charcoal);
}
.form-group label .req {
  display: inline-block;
  background: var(--teal);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 2px 6px;
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
}
.form-group label .opt {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--mid-gray);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 2px 6px;
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
}
.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--charcoal);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 13px 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
  line-height: 1.6;
  -webkit-appearance: none;
  appearance: none;
}
/* チェックボックスはネイティブ描画を維持（appearance:noneを上書きで無効化） */
.form-group input[type="checkbox"] {
  -webkit-appearance: checkbox;
  appearance: checkbox;
  width: auto;
  padding: 0;
  border: none;
  background: none;
  border-radius: 0;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0,128,128,0.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 140px;
}
.form-group .hint {
  font-size: 15px;
  color: var(--mid-gray);
  line-height: 1.6;
}

/* プライバシー同意 */
.privacy-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.privacy-check input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--teal);
  cursor: pointer;
}
.privacy-check label {
  font-size: 15px;
  color: var(--mid-gray);
  line-height: 1.7;
  cursor: pointer;
}
.privacy-check a {
  color: var(--teal);
  text-decoration: underline;
}

/* 送信ボタン */
.form-submit {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-submit {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--white);
  background: var(--teal);
  border: none;
  border-radius: 4px;
  padding: 16px 48px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: background 0.2s, transform 0.1s;
}
.btn-submit:hover { background: var(--deep-teal); }
.btn-submit:active { transform: scale(0.98); }
.btn-submit svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.form-note {
  font-size: 15px;
  color: var(--mid-gray);
  line-height: 1.6;
}

/* インフォカード（協賛・採用等）*/
.info-card {
  background: rgba(134,202,182,0.08);
  border: 1px solid rgba(0,128,128,0.2);
  border-radius: 8px;
  padding: 28px 32px;
  margin-bottom: 40px;
}
.info-card h3 {
  font-family: var(--font-ja-heading);
  font-size: 16px;
  font-weight: 500;
  color: var(--teal);
  margin-bottom: 12px;
}
.info-card p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--charcoal);
}
.info-card ul {
  list-style: none;
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.info-card ul li {
  font-size: 15px;
  color: var(--charcoal);
  padding-left: 20px;
  position: relative;
  line-height: 1.7;
}
.info-card ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 10px;
  width: 8px; height: 2px;
  background: var(--teal);
}

/* アニメーション */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* レスポンシブ */
@media (max-width: 767px) {
  .contact-hero { padding: 120px 0 60px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-tabs-wrap { top: 64px; }
  .tab-btn { padding: 16px 16px 13px; font-size: 15px; }
  .tab-panel { padding-top: 48px; }
  .info-card { padding: 20px 20px; }
  /* ↓↓↓ ここから追記 ↓↓↓ */

  /* タブ全体をstickyから通常フローに戻す */
  .contact-tabs-wrap {
    position: static;
    border-bottom: none;
    padding: 0 var(--gutter);
    margin-top: 24px;
  }

  /* タブを縦並びボタンリストに変更 */
  .contact-tabs {
    flex-direction: column;
    gap: 8px;
    overflow-x: visible;
    padding: 0;
  }

  /* 各タブボタンを横幅いっぱいのカード風に */
  .tab-btn {
    width: 100%;
    text-align: left;
    border: 1px solid var(--border);
    border-bottom: 1px solid var(--border); /* 上書きリセット */
    border-radius: 4px;
    padding: 14px 18px;
    font-size: 15px;
    background: var(--white);
    position: static; /* bottom:-2px を打ち消す */
  }

  /* アクティブタブは背景色をtealに */
  .tab-btn.active {
    background: var(--teal);
    color: var(--white);
    border-color: var(--teal);
    border-bottom-color: var(--teal);
  }
  .tab-btn:hover:not(.active) {
    border-color: var(--teal);
    background: rgba(0,128,128,0.05);
  }
}