/* ========================================
   タブUI コンポーネント
   ======================================== */

/* タブナビゲーション */
.tab-navigation {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* タブボタン */
.tab-btn {
  padding: 1rem 1.5rem;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  min-width: fit-content;
}

.tab-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: transparent;
  transition: left 0.5s;
}

.tab-btn:hover::before {
  left: 100%;
}

.tab-btn:hover {
  background: var(--bg-light);
  border-color: var(--theme-accent);
  color: var(--theme-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--theme-accent);
  outline-offset: 2px;
}

.tab-btn.active {
  background: var(--theme-accent);
  color: var(--text-light);
  border-color: var(--theme-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tab-btn.active:focus-visible {
  outline: 2px solid var(--text-light);
  outline-offset: 2px;
}

.tab-btn.active::before {
  display: none;
}

/* タブコンテンツ */
.tab-content {
  display: none;
  animation: fadeInUp 0.3s ease-out;
}

.tab-content.active {
  display: block;
}

/* アニメーション */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .tab-navigation {
    flex-direction: row;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
  }

  .tab-btn {
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    text-align: center;
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .tab-btn {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }
}