:root {
    --bg: #f7f7f8;
    --bg-card: #ffffff;
    --fg: #0a0a0a;
    --fg-soft: #3f3f46;
    --muted: #71717a;
    --muted-soft: #a1a1aa;
    --accent: #dc2626;
    --accent-soft: #fef2f2;
    --border: #e4e4e7;
    --border-soft: #f4f4f5;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "cv11", "ss01";
}

a { color: var(--accent); text-decoration: none; transition: color 0.12s; }
a:hover { text-decoration: underline; }

code {
    background: var(--border-soft);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--fg-soft);
}

/* ---------- header ---------- */
header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 36px 24px 28px;
    text-align: center;
}
header h1 {
    margin: 0 0 6px;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--fg);
}
.subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 13.5px;
    font-weight: 400;
}

/* ---------- main ---------- */
main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 20px;
}

.filters {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 18px;
}
.filters label {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.filters label span {
    font-size: 10.5px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}
.filters select {
    padding: 9px 32px 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 14px;
    -webkit-appearance: none;
    appearance: none;
    font-size: 13px;
    font-family: inherit;
    min-width: 170px;
    color: var(--fg);
    cursor: pointer;
    transition: border-color 0.12s, box-shadow 0.12s;
}
.filters select:hover { border-color: var(--muted-soft); }
.filters select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.filter-hint {
    margin: 0 0 0 auto;
    align-self: center;
    color: var(--muted);
    font-size: 12px;
}

/* ---------- DataTables refinements ---------- */
.dataTables_wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px 6px;
    box-shadow: var(--shadow);
}
.dataTables_length, .dataTables_filter {
    color: var(--muted);
    font-size: 12.5px;
    padding-bottom: 14px;
}
.dataTables_filter input {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 7px 12px;
    font-size: 13px;
    font-family: inherit;
    margin-left: 10px;
    min-width: 240px;
    transition: border-color 0.12s, box-shadow 0.12s;
}
.dataTables_filter input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.dataTables_length select {
    padding: 5px 22px 5px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-card);
    margin: 0 6px;
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 4px center;
    background-size: 12px;
}

table#leaderboard {
    width: 100% !important;
    background: var(--bg-card);
    font-variant-numeric: tabular-nums;
    border-collapse: collapse;
}
table.dataTable thead th {
    border-bottom: 1px solid var(--border) !important;
    padding: 11px 14px !important;
    font-weight: 600;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    text-align: left;
    background: var(--bg-card);
}
table.dataTable tbody td {
    padding: 11px 14px !important;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-soft) !important;
    color: var(--fg-soft);
    font-size: 13.5px;
}
table.dataTable tbody tr { transition: background-color 0.08s; }
table.dataTable tbody tr:hover { background: var(--border-soft); }
table.dataTable tbody tr:last-child td { border-bottom: 0 !important; }

/* Column-specific emphasis */
table.dataTable tbody td:nth-child(1) {              /* rank */
    color: var(--muted);
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    width: 48px;
}
table.dataTable tbody td:nth-child(2) {              /* name */
    font-weight: 600;
    color: var(--fg);
}
table.dataTable tbody td:nth-child(3) {              /* country */
    color: var(--muted);
    font-size: 12.5px;
    font-weight: 500;
    letter-spacing: 0.04em;
    width: 64px;
}
table.dataTable tbody td:nth-child(5) {              /* rating */
    font-weight: 600;
    color: var(--fg);
    font-variant-numeric: tabular-nums;
}
table.dataTable tbody td:nth-child(6) {              /* RD */
    color: var(--muted);
    font-size: 12.5px;
    font-variant-numeric: tabular-nums;
}
table.dataTable tbody td:nth-child(7),               /* games */
table.dataTable tbody td:nth-child(8) {              /* W-L-T */
    font-variant-numeric: tabular-nums;
    color: var(--muted);
    font-size: 12.5px;
}

/* Pagination */
.dataTables_info, .dataTables_paginate {
    color: var(--muted);
    font-size: 12.5px;
    padding-top: 14px;
    padding-bottom: 6px;
}
.paginate_button {
    padding: 5px 11px !important;
    border-radius: 6px !important;
    border: none !important;
    background: transparent !important;
    color: var(--fg-soft) !important;
    margin: 0 1px !important;
    transition: background 0.1s !important;
}
.paginate_button.current {
    background: var(--accent) !important;
    color: white !important;
    border: none !important;
}
.paginate_button.current:hover {
    background: var(--accent) !important;
    color: white !important;
    border: none !important;
}
.paginate_button:hover {
    background: var(--border-soft) !important;
    color: var(--fg) !important;
    border: none !important;
}
.paginate_button.disabled, .paginate_button.disabled:hover {
    color: var(--muted-soft) !important;
    background: transparent !important;
    cursor: not-allowed;
}

/* ---------- footer ---------- */
footer {
    max-width: 720px;
    margin: 56px auto 0;
    padding: 24px 20px 40px;
    color: var(--fg-soft);
    font-size: 13.5px;
    line-height: 1.65;
}
footer h2 {
    margin: 0 0 14px;
    font-size: 11px;
    font-weight: 600;
    color: var(--fg);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
footer p { margin: 0 0 12px; }
footer .muted {
    color: var(--muted);
    font-size: 12.5px;
    margin-top: 22px;
}

/* ---------- row click affordance ---------- */
table.dataTable tbody tr { cursor: pointer; }

/* ---------- modal ---------- */
body.modal-open { overflow: hidden; }

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    overflow-y: auto;
}
.modal[hidden] { display: none; }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.55);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    cursor: pointer;
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    max-width: 780px;
    width: 100%;
    padding: 32px;
    box-shadow:
        0 1px 3px rgba(0,0,0,0.05),
        0 12px 32px rgba(0,0,0,0.08),
        0 32px 64px rgba(0,0,0,0.10);
    animation: modal-in 0.18s ease-out;
}
@keyframes modal-in {
    from { opacity: 0; transform: translateY(8px) scale(0.99); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--muted);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-close:hover {
    background: var(--border-soft);
    color: var(--fg);
}

.modal-header { margin-bottom: 24px; }
.modal-header h2 {
    margin: 0 0 8px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--fg);
}
.modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    color: var(--fg-soft);
    font-size: 13.5px;
}
.modal-meta-secondary {
    color: var(--muted);
    font-size: 12.5px;
    margin-top: 4px;
}
.modal-meta-sep { color: var(--muted-soft); }
#modal-location { font-size: 12.5px; font-weight: 500; letter-spacing: 0.04em; color: var(--muted); }
#modal-rank { color: var(--muted); font-size: 13px; }
#modal-rating { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--fg); }
#modal-record { font-variant-numeric: tabular-nums; }
#modal-peak { font-variant-numeric: tabular-nums; }

.modal-chart-section,
.modal-table-section { margin-top: 26px; }
.modal-chart-section h3,
.modal-table-section h3 {
    margin: 0 0 12px;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    font-weight: 600;
}

.chart-container {
    position: relative;
    height: 240px;
    width: 100%;
}

.tournament-table-wrapper {
    max-height: 320px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

#tournament-history {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}
#tournament-history thead th {
    position: sticky;
    top: 0;
    background: var(--bg-card);
    padding: 10px 14px;
    text-align: left;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    z-index: 1;
}
#tournament-history tbody td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--border-soft);
    font-size: 13px;
    color: var(--fg-soft);
    vertical-align: middle;
}
#tournament-history tbody tr:last-child td { border-bottom: 0; }
.t-date { color: var(--muted); white-space: nowrap; font-size: 12.5px; }
.t-name { color: var(--fg); font-weight: 500; }
.t-finish { color: var(--muted); }
.t-record { color: var(--muted); }
.t-delta { font-weight: 500; }
.t-delta.delta-pos { color: #15803d; }
.t-delta.delta-neg { color: var(--accent); }
.t-rating { font-weight: 600; color: var(--fg); }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
    header { padding: 22px 14px 18px; }
    header h1 { font-size: 21px; }
    .subtitle { font-size: 12.5px; }
    main { padding: 18px 12px; }
    .filters { flex-direction: column; align-items: stretch; gap: 10px; }
    .filters select { min-width: 0; width: 100%; }
    .filter-hint { margin: 4px 0 0; align-self: flex-start; }
    .dataTables_wrapper { padding: 12px 12px 4px; }
    .dataTables_filter input { min-width: 0; width: 100%; margin-left: 0; margin-top: 6px; }
    table.dataTable thead th, table.dataTable tbody td {
        padding: 9px !important;
        font-size: 12.5px;
    }

    .modal { padding: 14px 8px; }
    .modal-content {
        padding: 22px 18px;
        border-radius: 12px;
    }
    .modal-header h2 { font-size: 19px; }
    .modal-meta { font-size: 12.5px; }
    .modal-meta-secondary { font-size: 12px; }
    .chart-container { height: 200px; }
    .tournament-table-wrapper { max-height: 280px; }
    #tournament-history thead th,
    #tournament-history tbody td {
        padding: 7px 10px;
        font-size: 12px;
    }
    .t-name { font-size: 12px; }
}