React + Web API SPF example (tanstack table)

App.css

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Archivo+Black&display=swap');

:root {
    --bg: #050914;
    --bg-elevated: #0c1220;
    --surface: #10182c;
    --surface-hover: #182238;
    --border: #23304a;
    --text: #f4f6fb;
    --text-muted: #8b96b3;
    --primary: #e60a3e;
    --primary-hover: #ff1f52;
    --accent: #004d98;
    --accent-light: #2f7bff;
    --violet: #3d0e5e;
    --gold: #ffc72c;
    --success: #00e28a;
    --danger: #ff4d5e;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: radial-gradient(1200px 600px at 15% -10%, rgba(0, 77, 152, 0.35), transparent 60%), radial-gradient(1000px 500px at 110% 0%, rgba(230, 10, 62, 0.25), transparent 55%), var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background: linear-gradient(120deg, #050914 0%, #10182c 45%, #3d0e5e 100%);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-soft);
}

.header-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 32px;
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-icon {
    font-size: 2.1rem;
    filter: drop-shadow(0 4px 10px rgba(230, 10, 62, 0.5));
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-family: 'Archivo Black', 'Inter', sans-serif;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    color: #fff;
    text-transform: uppercase;
}

.brand-sub {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2.5px;
    color: var(--gold);
    font-weight: 700;
    margin-top: 2px;
}

.nav {
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.04);
    padding: 6px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-btn {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.65);
    padding: 11px 26px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.25s ease;
}

    .nav-btn:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.08);
    }

    .nav-btn.active {
        background: linear-gradient(135deg, var(--primary), #b3002f);
        color: #fff;
        box-shadow: 0 8px 20px rgba(230, 10, 62, 0.45);
    }

.main {
    flex: 1;
    max-width: 1320px;
    width: 100%;
    margin: 0 auto;
    padding: 48px 32px;
}

.alert {
    background: rgba(255, 77, 94, 0.12);
    border: 1px solid rgba(255, 77, 94, 0.4);
    color: #ff9aa5;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 28px;
    font-weight: 500;
    backdrop-filter: blur(6px);
}

.layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 32px;
}

@media (max-width: 960px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

.panel {
    background: linear-gradient(180deg, var(--surface) 0%, rgba(16, 24, 44, 0.7) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 26px;
    background: linear-gradient(90deg, rgba(0, 77, 152, 0.5) 0%, transparent 100%);
    border-bottom: 1px solid var(--border);
}

    .panel-head h2 {
        font-size: 1.15rem;
        font-weight: 800;
        color: #fff;
        letter-spacing: -0.2px;
    }

.count {
    font-size: 0.78rem;
    color: #1a1a1a;
    font-weight: 800;
    background: var(--gold);
    padding: 5px 12px;
    border-radius: 999px;
}

.form {
    padding: 26px;
}

.field {
    margin-bottom: 18px;
}

    .field label {
        display: block;
        font-size: 0.75rem;
        font-weight: 700;
        color: var(--text-muted);
        margin-bottom: 8px;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .field input {
        width: 100%;
        padding: 13px 16px;
        background: var(--bg-elevated);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        color: var(--text);
        font-size: 0.95rem;
        outline: none;
        transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    }

        .field input:focus {
            border-color: var(--accent-light);
            background: rgba(47, 123, 255, 0.06);
            box-shadow: 0 0 0 4px rgba(47, 123, 255, 0.18);
        }

        .field input::placeholder {
            color: #4d5a78;
        }

    .field select {
        width: 100%;
        padding: 13px 40px 13px 16px;
        background-color: var(--bg-elevated);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        color: var(--text);
        font-size: 0.95rem;
        outline: none;
        cursor: pointer;
        appearance: none;
        -webkit-appearance: none;
        background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b96b3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>");
        background-repeat: no-repeat;
        background-position: right 14px center;
        background-size: 16px;
        transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
    }

        .field select:hover {
            border-color: var(--accent-light);
        }

        .field select:focus {
            border-color: var(--accent-light);
            background-color: rgba(47, 123, 255, 0.06);
            box-shadow: 0 0 0 4px rgba(47, 123, 255, 0.18);
        }

        .field select option {
            background: var(--bg-elevated);
            color: var(--text);
        }

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 10px;
}

.btn {
    padding: 13px 22px;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #ff2f61 100%);
    color: #fff;
    flex: 1;
    box-shadow: 0 10px 24px rgba(230, 10, 62, 0.4);
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 14px 30px rgba(230, 10, 62, 0.55);
    }

    .btn-primary:active {
        transform: translateY(0);
    }

.btn-ghost {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

    .btn-ghost:hover {
        background: var(--surface-hover);
        color: #fff;
        border-color: var(--accent-light);
    }

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #c9182c 100%);
    color: #fff;
    box-shadow: 0 10px 24px rgba(255, 77, 94, 0.35);
}

    .btn-danger:hover {
        transform: translateY(-2px);
        box-shadow: 0 14px 30px rgba(255, 77, 94, 0.5);
    }

    .btn-danger:active {
        transform: translateY(0);
    }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 5, 12, 0.72);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    animation: overlay-fade 0.2s ease;
}

@keyframes overlay-fade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal {
    width: 100%;
    max-width: 420px;
    background: linear-gradient(180deg, var(--surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
    text-align: center;
    animation: modal-pop 0.25s cubic-bezier(0.2, 0.9, 0.3, 1.3);
}

@keyframes modal-pop {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.96);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: rgba(255, 77, 94, 0.14);
    border: 1px solid rgba(255, 77, 94, 0.35);
    color: var(--danger);
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 10px;
    letter-spacing: -0.2px;
}

.modal-text {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
    margin-bottom: 26px;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

    .modal-actions .btn {
        flex: 1;
    }

.list-panel {
    display: flex;
    flex-direction: column;
}

.table-wrap {
    overflow-x: auto;
    flex: 1;
}

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

th {
    text-align: left;
    padding: 16px 22px;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

td {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border);
    font-size: 0.92rem;
}

tbody tr {
    transition: background 0.2s ease;
}

    tbody tr:hover {
        background: var(--surface-hover);
    }

.th-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sortable {
    cursor: pointer;
    user-select: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.15s ease;
}

    .sortable:hover {
        color: #fff;
    }

.sort-arrow {
    font-size: 0.65rem;
    color: var(--gold);
}

.filter-input {
    width: 100%;
    padding: 7px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 500;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

    .filter-input:focus {
        border-color: var(--accent-light);
        box-shadow: 0 0 0 3px rgba(47, 123, 255, 0.15);
    }

    .filter-input::placeholder {
        color: #4d5a78;
        font-weight: 400;
    }

.id {
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
}

.name {
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.1px;
}

.team-name {
    color: var(--gold);
    font-weight: 700;
}

.coach {
    color: var(--text-muted);
}

.badge {
    display: inline-block;
    background: rgba(47, 123, 255, 0.16);
    color: var(--accent-light);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    border: 1px solid rgba(47, 123, 255, 0.3);
}

.actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

    .icon-btn.edit {
        background: rgba(47, 123, 255, 0.14);
        color: var(--accent-light);
    }

        .icon-btn.edit:hover {
            background: var(--accent-light);
            color: #fff;
            transform: translateY(-1px);
        }

    .icon-btn.delete {
        background: rgba(255, 77, 94, 0.14);
        color: var(--danger);
    }

        .icon-btn.delete:hover {
            background: var(--danger);
            color: #fff;
            transform: translateY(-1px);
        }

.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 64px 18px !important;
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    padding: 80px 20px;
    color: var(--text-muted);
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 18px 22px;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
}

.pagination-btn {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

    .pagination-btn:hover:not(:disabled) {
        background: var(--surface-hover);
        border-color: var(--accent-light);
        color: #fff;
        transform: translateY(-1px);
    }

    .pagination-btn:disabled {
        opacity: 0.35;
        cursor: not-allowed;
    }

.pagination-info {
    font-size: 0.88rem;
    color: var(--text-muted);
    padding: 0 8px;
    min-width: 120px;
    text-align: center;
}

    .pagination-info strong {
        color: #fff;
        font-weight: 800;
    }

.pagination-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-left: 12px;
    padding: 5px 12px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 999px;
    border: 1px solid var(--border);
}

.footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
    padding: 28px 32px;
}

.footer-inner {
    max-width: 1320px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.footer-copy {
    font-size: 0.75rem;
    opacity: 0.7;
}

App.jsx

import { useState, useEffect, useCallback, useMemo } from 'react';
import {
    useTable,
    tableFeatures,
    rowSortingFeature,
    createSortedRowModel,
    rowPaginationFeature,
    createPaginatedRowModel,
    columnFilteringFeature,
    createFilteredRowModel,
    createColumnHelper,
    filterFn_includesString,
} from '@tanstack/react-table';

import './App.css';

const API_BASE_URL = '/api';

const columnHelper = createColumnHelper();

const playersTableFeatures = tableFeatures({
    columnFilteringFeature,
    filteredRowModel: createFilteredRowModel(),
    filterFns: {
        includesString: filterFn_includesString,
    },
    rowSortingFeature,
    sortedRowModel: createSortedRowModel(),
    rowPaginationFeature,
    paginatedRowModel: createPaginatedRowModel(),
});

export default function App() {
    const [activeTab, setActiveTab] = useState('players');
    const [players, setPlayers] = useState([]);
    const [teams, setTeams] = useState([]);
    const [teamOptions, setTeamOptions] = useState([]);
    const [loading, setLoading] = useState(false);
    const [error, setError] = useState(null);
    const [playerForm, setPlayerForm] = useState({ id: 0, name: '', age: '', position: '', teamId: '' });
    const [teamForm, setTeamForm] = useState({ id: 0, name: '', coach: '' });
    const [isEditing, setIsEditing] = useState(false);

    const playersColumns = useMemo(
        () => [
            columnHelper.accessor('id', {
                header: 'ID',
                filterFn: 'includesString',
            }),
            columnHelper.accessor('name', {
                header: "Ім'я",
                filterFn: 'includesString',
            }),
            columnHelper.accessor('age', {
                header: 'Вік',
                filterFn: 'includesString',
            }),
            columnHelper.accessor('position', {
                header: 'Позиція',
                filterFn: 'includesString',
            }),
            columnHelper.accessor('team', {
                header: 'Команда',
                filterFn: 'includesString',
            }),
        ],
        []
    );

    const [sorting, setSorting] = useState([]);
    const [columnFilters, setColumnFilters] = useState([]);
    const [pagination, setPagination] = useState({
        pageIndex: 0,
        pageSize: 5,
    });

    const playersTable = useTable({
        features: playersTableFeatures,
        data: players,
        columns: playersColumns,
        state: { sorting, columnFilters, pagination },
        onSortingChange: setSorting,
        onColumnFiltersChange: setColumnFilters,
        onPaginationChange: setPagination,
    });

    const displayPlayers = playersTable.getRowModel().rows.map((row) => row.original);

    const getSortHandler = (key) => playersTable.getColumn(key)?.getToggleSortingHandler();

    const renderSortIcon = (key) => {
        const direction = playersTable.getColumn(key)?.getIsSorted();
        if (!direction) return null;
        return <span className="sort-arrow">{direction === 'asc' ? '▲' : '▼'}</span>;
    };

    const resetForm = useCallback(() => {
        setPlayerForm({ id: 0, name: '', age: '', position: '', teamId: '' });
        setTeamForm({ id: 0, name: '', coach: '' });
        setIsEditing(false);
    }, []);

    const refreshTeamOptions = async () => {
        try {
            const response = await fetch(`${API_BASE_URL}/teams`);
            if (!response.ok) return;
            const data = await response.json();
            setTeamOptions(data);
        } catch {
            setTeamOptions([]);
        }
    };

    const fetchData = useCallback(async () => {
        setLoading(true);
        setError(null);
        try {
            const endpoint = activeTab === 'players' ? 'players' : 'teams';
            const response = await fetch(`${API_BASE_URL}/${endpoint}`);
            if (!response.ok) throw new Error(`Помилка завантаження: ${response.statusText}`);
            const data = await response.json();
            if (activeTab === 'players') setPlayers(data);
            else setTeams(data);
        } catch (err) {
            setError(err.message);
        } finally {
            setLoading(false);
        }
    }, [activeTab]);

    useEffect(() => {
        let ignore = false;
        const load = async () => {
            resetForm();
            setSorting([]);
            setColumnFilters([]);
            setPagination((prev) => ({ ...prev, pageIndex: 0 }));
            setLoading(true);
            setError(null);
            try {
                const endpoint = activeTab === 'players' ? 'players' : 'teams';
                const response = await fetch(`${API_BASE_URL}/${endpoint}`);
                if (!response.ok) throw new Error(`Помилка завантаження: ${response.statusText}`);
                const data = await response.json();

                if (activeTab === 'players') {
                    const teamsResponse = await fetch(`${API_BASE_URL}/teams`);
                    const teamsData = teamsResponse.ok ? await teamsResponse.json() : [];
                    if (!ignore) {
                        setPlayers(data);
                        setTeamOptions(teamsData);
                    }
                } else {
                    if (!ignore) {
                        setTeams(data);
                        setTeamOptions(data);
                    }
                }
            } catch (err) {
                if (!ignore) setError(err.message);
            } finally {
                if (!ignore) setLoading(false);
            }
        };
        load();
        return () => { ignore = true; };
    }, [activeTab, resetForm]);

    const handleSubmit = async (e) => {
        e.preventDefault();
        const isPlayer = activeTab === 'players';
        const endpoint = isPlayer ? 'players' : 'teams';
        const formData = isPlayer
            ? { ...playerForm, age: Number(playerForm.age), teamId: playerForm.teamId ? Number(playerForm.teamId) : null }
            : teamForm;
        const url = isEditing ? `${API_BASE_URL}/${endpoint}/${formData.id}` : `${API_BASE_URL}/${endpoint}`;
        const method = isEditing ? 'PUT' : 'POST';

        try {
            const response = await fetch(url, {
                method,
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(formData),
            });
            if (!response.ok) throw new Error('Не вдалося зберегти дані');
            resetForm();
            fetchData();
            if (!isPlayer) refreshTeamOptions();
        } catch (err) {
            setError(err.message);
        }
    };

    const handleEdit = (item) => {
        setIsEditing(true);
        if (activeTab === 'players') {
            setPlayerForm({
                id: item.id,
                name: item.name || '',
                age: item.age ?? '',
                position: item.position || '',
                teamId: item.teamId ?? '',
            });
        } else {
            setTeamForm({
                id: item.id,
                name: item.name || '',
                coach: item.coach || '',
            });
        }
    };

    const [confirmDialog, setConfirmDialog] = useState(null);

    const requestDelete = (id, name) => {
        setConfirmDialog({ id, name });
    };

    const cancelDelete = () => {
        setConfirmDialog(null);
    };

    const confirmDelete = async () => {
        if (!confirmDialog) return;
        const id = confirmDialog.id;
        setConfirmDialog(null);
        const endpoint = activeTab === 'players' ? 'players' : 'teams';
        try {
            const response = await fetch(`${API_BASE_URL}/${endpoint}/${id}`, { method: 'DELETE' });
            if (!response.ok) throw new Error('Помилка при видаленні');
            fetchData();
            if (activeTab === 'teams') refreshTeamOptions();
        } catch (err) {
            setError(err.message);
        }
    };

    return (
        <div className="app">
            <header className="header">
                <div className="header-inner">
                    <div className="brand">
                        <span className="brand-icon">⚽</span>
                        <div className="brand-text">
                            <span className="brand-title">Футбольна ліга</span>
                            <span className="brand-sub">Менеджер гравців та команд</span>
                        </div>
                    </div>
                    <nav className="nav">
                        <button
                            className={`nav-btn ${activeTab === 'players' ? 'active' : ''}`}
                            onClick={() => setActiveTab('players')}
                        >
                            Гравці
                        </button>
                        <button
                            className={`nav-btn ${activeTab === 'teams' ? 'active' : ''}`}
                            onClick={() => setActiveTab('teams')}
                        >
                            Команди
                        </button>
                    </nav>
                </div>
            </header>

            <main className="main">
                {error && <div className="alert">{error}</div>}

                <div className="layout">
                    <section className="panel form-panel">
                        <div className="panel-head">
                            <h2>{isEditing ? 'Редагувати' : 'Додати'} {activeTab === 'players' ? 'гравця' : 'команду'}</h2>
                        </div>
                        <form onSubmit={handleSubmit} className="form">
                            {activeTab === 'players' ? (
                                <>
                                    <div className="field">
                                        <label>Ім'я</label>
                                        <input
                                            type="text"
                                            required
                                            value={playerForm.name}
                                            onChange={(e) => setPlayerForm({ ...playerForm, name: e.target.value })}
                                            placeholder="Ім'я гравця"
                                        />
                                    </div>
                                    <div className="field">
                                        <label>Вік</label>
                                        <input
                                            type="number"
                                            required
                                            min="16"
                                            max="50"
                                            value={playerForm.age}
                                            onChange={(e) => setPlayerForm({ ...playerForm, age: e.target.value })}
                                            placeholder="Вік"
                                        />
                                    </div>
                                    <div className="field">
                                        <label>Позиція</label>
                                        <input
                                            type="text"
                                            required
                                            value={playerForm.position}
                                            onChange={(e) => setPlayerForm({ ...playerForm, position: e.target.value })}
                                            placeholder="Позиція"
                                        />
                                    </div>
                                    <div className="field">
                                        <label>Команда</label>
                                        <select
                                            value={playerForm.teamId}
                                            onChange={(e) => setPlayerForm({ ...playerForm, teamId: e.target.value })}
                                        >
                                            <option value="">Без команди</option>
                                            {teamOptions.map((t) => (
                                                <option key={t.id} value={t.id}>
                                                    {t.name}
                                                </option>
                                            ))}
                                        </select>
                                    </div>
                                </>
                            ) : (
                                <>
                                    <div className="field">
                                        <label>Назва команди</label>
                                        <input
                                            type="text"
                                            required
                                            value={teamForm.name}
                                            onChange={(e) => setTeamForm({ ...teamForm, name: e.target.value })}
                                            placeholder="Назва команди"
                                        />
                                    </div>
                                    <div className="field">
                                        <label>Тренер</label>
                                        <input
                                            type="text"
                                            required
                                            value={teamForm.coach}
                                            onChange={(e) => setTeamForm({ ...teamForm, coach: e.target.value })}
                                            placeholder="Ім'я тренера"
                                        />
                                    </div>
                                </>
                            )}
                            <div className="form-actions">
                                <button type="submit" className="btn btn-primary">
                                    {isEditing ? 'Зберегти' : 'Додати'}
                                </button>
                                {isEditing && (
                                    <button type="button" className="btn btn-ghost" onClick={resetForm}>
                                        Скасувати
                                    </button>
                                )}
                            </div>
                        </form>
                    </section>

                    <section className="panel list-panel">
                        <div className="panel-head">
                            <h2>{activeTab === 'players' ? 'Гравці' : 'Команди'}</h2>
                            <span className="count">
                                {(activeTab === 'players' ? players : teams).length} записів
                            </span>
                        </div>

                        {loading ? (
                            <div className="loader">
                                <div className="spinner" />
                                <span>Завантаження...</span>
                            </div>
                        ) : (
                            <>
                                <div className="table-wrap">
                                    <table>
                                        <thead>
                                            <tr>
                                                {activeTab === 'players' ? (
                                                    <>
                                                        <th>
                                                            <div className="th-content">
                                                                <span className="sortable" onClick={getSortHandler('id')}>
                                                                    ID{renderSortIcon('id')}
                                                                </span>
                                                                <input
                                                                    className="filter-input"
                                                                    placeholder="Фільтр..."
                                                                    value={playersTable.getColumn('id')?.getFilterValue() ?? ''}
                                                                    onChange={(e) =>
                                                                        playersTable.getColumn('id')?.setFilterValue(e.target.value)
                                                                    }
                                                                />
                                                            </div>
                                                        </th>
                                                        <th>
                                                            <div className="th-content">
                                                                <span className="sortable" onClick={getSortHandler('name')}>
                                                                    Ім'я{renderSortIcon('name')}
                                                                </span>
                                                                <input
                                                                    className="filter-input"
                                                                    placeholder="Фільтр..."
                                                                    value={playersTable.getColumn('name')?.getFilterValue() ?? ''}
                                                                    onChange={(e) =>
                                                                        playersTable.getColumn('name')?.setFilterValue(e.target.value)
                                                                    }
                                                                />
                                                            </div>
                                                        </th>
                                                        <th>
                                                            <div className="th-content">
                                                                <span className="sortable" onClick={getSortHandler('age')}>
                                                                    Вік{renderSortIcon('age')}
                                                                </span>
                                                                <input
                                                                    className="filter-input"
                                                                    placeholder="Фільтр..."
                                                                    value={playersTable.getColumn('age')?.getFilterValue() ?? ''}
                                                                    onChange={(e) =>
                                                                        playersTable.getColumn('age')?.setFilterValue(e.target.value)
                                                                    }
                                                                />
                                                            </div>
                                                        </th>
                                                        <th>
                                                            <div className="th-content">
                                                                <span className="sortable" onClick={getSortHandler('position')}>
                                                                    Позиція{renderSortIcon('position')}
                                                                </span>
                                                                <input
                                                                    className="filter-input"
                                                                    placeholder="Фільтр..."
                                                                    value={playersTable.getColumn('position')?.getFilterValue() ?? ''}
                                                                    onChange={(e) =>
                                                                        playersTable.getColumn('position')?.setFilterValue(e.target.value)
                                                                    }
                                                                />
                                                            </div>
                                                        </th>
                                                        <th>
                                                            <div className="th-content">
                                                                <span className="sortable" onClick={getSortHandler('team')}>
                                                                    Команда{renderSortIcon('team')}
                                                                </span>
                                                                <input
                                                                    className="filter-input"
                                                                    placeholder="Фільтр..."
                                                                    value={playersTable.getColumn('team')?.getFilterValue() ?? ''}
                                                                    onChange={(e) =>
                                                                        playersTable.getColumn('team')?.setFilterValue(e.target.value)
                                                                    }
                                                                />
                                                            </div>
                                                        </th>
                                                    </>
                                                ) : (
                                                    <>
                                                        <th>ID</th>
                                                        <th>Команда</th>
                                                        <th>Тренер</th>
                                                    </>
                                                )}
                                                <th>Дії</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            {(activeTab === 'players' ? displayPlayers : teams).length === 0 ? (
                                                <tr>
                                                    <td colSpan={activeTab === 'players' ? 6 : 4} className="empty">
                                                        Дані відсутні
                                                    </td>
                                                </tr>
                                            ) : activeTab === 'players' ? (
                                                displayPlayers.map((item) => (
                                                    <tr key={item.id}>
                                                        <td className="id">{item.id}</td>
                                                        <td className="name">{item.name}</td>
                                                        <td>{item.age}</td>
                                                        <td>
                                                            <span className="badge">{item.position}</span>
                                                        </td>
                                                        <td className="team-name">{item.team || '—'}</td>
                                                        <td>
                                                            <div className="actions">
                                                                <button
                                                                    className="icon-btn edit"
                                                                    onClick={() => handleEdit(item)}
                                                                    title="Редагувати"
                                                                >
                                                                    ✎
                                                                </button>
                                                                <button
                                                                    className="icon-btn delete"
                                                                    onClick={() => requestDelete(item.id, item.name)}
                                                                    title="Видалити"
                                                                >
                                                                    ✕
                                                                </button>
                                                            </div>
                                                        </td>
                                                    </tr>
                                                ))
                                            ) : (
                                                teams.map((item) => (
                                                    <tr key={item.id}>
                                                        <td className="id">{item.id}</td>
                                                        <td className="name">{item.name}</td>
                                                        <td className="coach">{item.coach}</td>
                                                        <td>
                                                            <div className="actions">
                                                                <button
                                                                    className="icon-btn edit"
                                                                    onClick={() => handleEdit(item)}
                                                                    title="Редагувати"
                                                                >
                                                                    ✎
                                                                </button>
                                                                <button
                                                                    className="icon-btn delete"
                                                                    onClick={() => requestDelete(item.id, item.name)}
                                                                    title="Видалити"
                                                                >
                                                                    ✕
                                                                </button>
                                                            </div>
                                                        </td>
                                                    </tr>
                                                ))
                                            )}
                                        </tbody>
                                    </table>
                                </div>

                                    {activeTab === 'players' && players.length > 0 && (
                                        <div className="pagination">
                                            <button
                                                className="pagination-btn"
                                                onClick={() => playersTable.setPageIndex(0)}
                                                disabled={!playersTable.getCanPreviousPage()}
                                                title="Перша сторінка"
                                            >
                                                «
                                            </button>
                                            <button
                                                className="pagination-btn"
                                                onClick={() => playersTable.previousPage()}
                                                disabled={!playersTable.getCanPreviousPage()}
                                                title="Попередня"
                                            >
                                                ‹
                                            </button>

                                            <span className="pagination-info">
                                                Сторінка <strong>{playersTable.state.pagination.pageIndex + 1}</strong> з{' '}
                                                <strong>{playersTable.getPageCount() || 1}</strong>
                                            </span>

                                            <button
                                                className="pagination-btn"
                                                onClick={() => playersTable.nextPage()}
                                                disabled={!playersTable.getCanNextPage()}
                                                title="Наступна"
                                            >
                                                ›
                                            </button>
                                            <button
                                                className="pagination-btn"
                                                onClick={() => playersTable.setPageIndex(playersTable.getPageCount() - 1)}
                                                disabled={!playersTable.getCanNextPage()}
                                                title="Остання сторінка"
                                            >
                                                »
                                            </button>

                                            <span className="pagination-meta">
                                                {displayPlayers.length} з {players.length} гравців
                                            </span>
                                        </div>
                                    )}
                            </>
                        )}
                    </section>
                </div>
            </main>

            <footer className="footer">
                <div className="footer-inner">
                    <div className="footer-brand">
                        <span className="brand-icon">⚽</span>
                        <span>Футбольна ліга</span>
                    </div>
                    <p>Приклад: сортування + пагінація + фільтрація (TanStack Table)</p>
                    <p className="footer-copy">© {new Date().toLocaleString('uk-UA')}</p>
                </div>
            </footer>

            {confirmDialog && (
                <div className="modal-overlay" onClick={cancelDelete}>
                    <div className="modal" onClick={(e) => e.stopPropagation()}>
                        <div className="modal-icon">⚠</div>
                        <h3 className="modal-title">Видалити запис?</h3>
                        <p className="modal-text">
                            {activeTab === 'players' ? 'Гравця' : 'Команду'} «{confirmDialog.name}» буде видалено назавжди. Цю дію неможливо скасувати.
                        </p>
                        <div className="modal-actions">
                            <button className="btn btn-ghost" onClick={cancelDelete}>
                                Скасувати
                            </button>
                            <button className="btn btn-danger" onClick={confirmDelete}>
                                Видалити
                            </button>
                        </div>
                    </div>
                </div>
            )}
        </div>
    );
}