/* =============================================
   管理画面専用スタイル
   ============================================= */

/* 管理画面ヘッダー */
.admin-header {
    background: linear-gradient(135deg, #374151, #1F2937);
    color: white;
    padding: 100px 0 60px;
    margin-top: 70px;
    text-align: center;
}

.admin-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.admin-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 管理画面コンテンツ */
.admin-content {
    padding: 3rem 0 5rem;
    background-color: var(--bg-light);
    min-height: 70vh;
}

/* タブ */
.admin-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 200px;
    padding: 1.2rem 2rem;
    background-color: white;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tab-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.tab-btn i {
    font-size: 1.3rem;
}

/* データパネル */
.data-panel {
    background-color: white;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.panel-header {
    padding: 2rem;
    background-color: var(--bg-light);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.panel-title h2 {
    font-size: 1.8rem;
    color: var(--text-dark);
}

.data-count {
    padding: 0.4rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.panel-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* テーブルコンテナ */
.table-container {
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.admin-table thead {
    position: sticky;
    top: 0;
    background-color: var(--bg-light);
    z-index: 10;
}

.admin-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 700;
    color: var(--text-dark);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.admin-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-table tbody tr {
    transition: background-color 0.2s ease;
}

.admin-table tbody tr:hover {
    background-color: #F9FAFB;
}

.admin-table td.wrap {
    white-space: normal;
    word-break: break-word;
}

.timestamp {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ページネーション */
.pagination {
    padding: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* 空データメッセージ */
.empty-message {
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-light);
}

.empty-message i {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 1rem;
}

.empty-message h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.empty-message p {
    font-size: 1.1rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .admin-header {
        padding: 80px 0 40px;
    }

    .admin-header h1 {
        font-size: 2rem;
    }

    .admin-tabs {
        flex-direction: column;
    }

    .tab-btn {
        min-width: 100%;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .panel-actions {
        width: 100%;
    }

    .panel-actions button {
        flex: 1;
    }

    .admin-table {
        font-size: 0.85rem;
    }

    .admin-table th,
    .admin-table td {
        padding: 0.75rem 0.5rem;
    }
}