*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

/* ログイン画面 */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.login-card {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

.login-card h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #1a1a1a;
}

/* フォーム */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 600;
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.875rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #4a90d9;
  box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.2);
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  font-size: 0.875rem;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: #4a90d9;
  color: #fff;
}

.btn-primary:hover {
  background: #357abd;
}

.btn-secondary {
  background: #e0e0e0;
  color: #333;
}

.btn-secondary:hover {
  background: #d0d0d0;
}

.btn-danger {
  background: #d9534f;
  color: #fff;
}

.btn-danger:hover {
  background: #c9302c;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.btn-full {
  width: 100%;
}

/* エラーメッセージ */
.error-message {
  color: #d9534f;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  background: #fdf2f2;
  border-radius: 4px;
}

/* ヘッダー */
.header {
  background: #fff;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header h1 {
  font-size: 1.25rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#adminUser {
  font-size: 0.875rem;
  color: #666;
}

/* メイン */
.main {
  padding: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* ツールバー */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filters {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.filters select,
.filters input {
  padding: 0.4rem 0.6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.825rem;
}

/* テーブル */
.table-wrapper {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid #eee;
  font-size: 0.85rem;
  white-space: nowrap;
}

th {
  background: #f9f9f9;
  font-weight: 600;
  position: sticky;
  top: 0;
}

tr:hover {
  background: #f5f9ff;
}

.empty-message {
  padding: 2rem;
  text-align: center;
  color: #999;
}

/* ステータスバッジ */
.status-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-active {
  background: #d4edda;
  color: #155724;
}

.status-expired {
  background: #fff3cd;
  color: #856404;
}

.status-revoked {
  background: #f8d7da;
  color: #721c24;
}

/* ダイアログ */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.dialog-overlay[hidden] {
  display: none;
}

.dialog {
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 480px;
}

.dialog h2 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ライセンスキー表示 */
.license-key {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.85rem;
  user-select: all;
}

/* アクションボタン群 */
.action-buttons {
  display: flex;
  gap: 0.25rem;
}

/* タブナビゲーション */
.tab-nav {
  display: flex;
  background: #fff;
  border-bottom: 2px solid #e0e0e0;
  padding: 0 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: #666;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tab-btn:hover {
  color: #4a90d9;
}

.tab-btn.active {
  color: #4a90d9;
  border-bottom-color: #4a90d9;
}

/* タブコンテンツ */
.tab-content {
  display: none;
}

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

/* ページネーション */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
}

.page-info {
  font-size: 0.85rem;
  color: #666;
}