/* ============================================================
   ツールページ共通スタイル
   ============================================================ */
.tool-main {
  max-width: 760px;
  margin: 24px auto;
  padding: 0 16px 48px;
}

.tool-h1 {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-header-bg);
  margin: 0 0 6px;
}

.tool-desc {
  color: #666;
  font-size: 0.92rem;
  margin: 0 0 20px;
}

/* ============================================================
   ツールカード
   ============================================================ */
.tool-card {
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  margin-bottom: 20px;
}

.tool-form {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 0;
}

.tool-label {
  display: block;
  font-size: 0.85rem;
  font-weight: bold;
  color: #555;
  margin-bottom: 5px;
}

.tool-input {
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 8px 10px;
  outline: none;
  background: white;
  transition: border-color 0.15s;
}

.tool-input:focus { border-color: var(--color-header-bg); }

.tool-num-input { width: 110px; }

.tool-btn { padding: 8px 24px; font-size: 1rem; }

/* ============================================================
   タブ
   ============================================================ */
.tool-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 2px solid #ddd;
  padding-bottom: 0;
}

.tool-tab {
  padding: 7px 18px;
  font-size: 0.88rem;
  border: 1px solid #ddd;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  background: #f5f5f5;
  cursor: pointer;
  color: #666;
  transition: background 0.12s;
  margin-bottom: -2px;
}

.tool-tab.active {
  background: var(--color-header-bg);
  color: white;
  border-color: var(--color-header-bg);
}

.tool-tab:hover:not(.active) { background: #e8e8e8; }

/* ============================================================
   タブペイン
   ============================================================ */
.tool-pane {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

.tool-pane .tool-label {
  font-weight: bold;
}

.tool-radio {
  display: flex;
  gap: 16px;
  align-items: center;
  padding-bottom: 2px;
}

.tool-radio label {
  font-size: 0.9rem;
  color: #444;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================================
   結果表示
   ============================================================ */
.tool-result {
  width: 100%;
  border-top: 1px solid #eee;
  margin-top: 16px;
  padding-top: 16px;
}

/* 年齢計算 */
.age-main {
  font-size: 2.4rem;
  font-weight: bold;
  color: var(--color-header-bg);
  line-height: 1.1;
  margin-bottom: 8px;
}

.age-unit { font-size: 1.3rem; margin-left: 2px; }

.age-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 10px;
}

.age-months { font-weight: bold; }

.age-kazoe {
  color: #888;
  font-size: 0.85rem;
}

.age-next {
  font-size: 0.92rem;
  color: #444;
  background: #f5f8ff;
  padding: 9px 13px;
  border-radius: 5px;
  border-left: 3px solid var(--color-header-bg);
  line-height: 1.6;
}

/* 日数計算 */
.days-main {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--color-header-bg);
  margin-bottom: 6px;
  line-height: 1.1;
}

.days-num { font-size: 2.4rem; }
.days-unit { font-size: 1.2rem; margin-left: 3px; }

.days-sub {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 4px;
  line-height: 1.5;
}

/* ============================================================
   解説・FAQセクション
   ============================================================ */
.tool-explain {
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 18px 20px;
  margin-bottom: 20px;
}

.tool-explain h2 {
  font-size: 1.05rem;
  font-weight: bold;
  color: var(--color-header-bg);
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #eee;
}

.tool-explain h3 {
  font-size: 0.92rem;
  font-weight: bold;
  color: #444;
  margin: 12px 0 4px;
}

.tool-explain h3:first-of-type { margin-top: 4px; }

.tool-explain p {
  font-size: 0.88rem;
  color: #555;
  line-height: 1.75;
  margin: 0 0 8px;
}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 600px) {
  .tool-main { padding: 0 12px 40px; }

  .tool-form,
  .tool-pane { flex-direction: column; align-items: stretch; }

  .tool-input { width: 100%; box-sizing: border-box; }
  .tool-num-input { width: 100%; }

  .tool-btn { width: 100%; }

  .age-main { font-size: 2rem; }
  .days-num { font-size: 2rem; }
}

@media print {
  .tool-card,
  .tool-explain { display: none !important; }
}