/* ヘッダーリセットと再定義 */
.app-header {
  background-color: #67f2e2 !important;
  color: #1a2a36 !important;
  padding: 0 10px !important;
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1) !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 100 !important;
  height: 48px !important;
  box-sizing: border-box !important;
  width: 100% !important;
  margin: 0 !important;
}

/* ロゴスタイルを強制適用 */
.header-logo {
  display: flex !important;
  align-items: center !important;
  height: 100% !important;
}

.header-logo h1 {
  font-size: 1.1rem !important;
  font-weight: 900 !important;
  letter-spacing: 1px !important;
  margin: 0 !important;
  text-transform: uppercase !important;
  color: #1a2a36 !important;
}

/* ナビゲーション部分のスタイルを強制適用 */
.user-nav {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  gap: 8px !important;
  max-width: 50% !important;
  height: 100% !important;
}

/* 認証ボタンスタイルを強制適用 - 必ず横並びに */
.auth-buttons {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  gap: 6px !important;
  margin: 0 !important;
  height: 100% !important;
  min-width: 0 !important;
}

/* ユーザー名表示スタイル */
.username {
  font-size: 0.75rem !important;
  margin: 0 !important;
  font-weight: 600 !important;
  color: #1a2a36 !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  max-width: 100px !important;
}

/* ボタンスタイルを強制適用 */
.auth-btn {
  background-color: #1a2a36 !important;
  color: #ffffff !important;
  border: none !important;
  border-radius: 4px !important;
  padding: 6px 10px !important;
  font-size: 0.75rem !important;
  cursor: pointer !important;
  transition: all 0.2s ease !important;
  font-weight: 500 !important;
  letter-spacing: 0.5px !important;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1) !important;
  margin: 0 !important;
  line-height: 1 !important;
  text-decoration: none !important;
  display: inline-block !important;
}

.auth-btn:hover {
  background-color: #121e27 !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15) !important;
}

/* ソーシャルログイン */
.social-login {
  display: flex;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xs);
}

.social-btn {
  background-color: #f8f9fa;
  border: none;
  border-radius: var(--border-radius-sm);
  padding: 4px 8px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.google-btn {
  color: #4285F4;
}

.line-btn {
  color: #06C755;
}

.social-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* メディアクエリ - モバイル調整 */
@media (max-width: 600px) {
  .auth-buttons {
    flex-direction: column;
    align-items: flex-end;
  }
  
  .social-login {
    margin-top: var(--spacing-xs);
  }
}