:root {
    --arena-bg: #f4f6f9;
    --arena-surface: #ffffff;
    --arena-surface-muted: #f8f9fa;
    --arena-border: #dee2e6;
    --arena-text: #212529;
    --arena-text-muted: #6c757d;
    --arena-navbar-bg: #121a24;
    --arena-navbar-border: rgba(255, 255, 255, 0.06);
    --arena-accent: #4f8cff;
    --arena-accent-2: #7c5cff;
    --arena-shadow: 0 0.25rem 1rem rgba(15, 23, 42, 0.06);
}

[data-theme="dark"] {
    --arena-bg: #0b1017;
    --arena-surface: #151d2b;
    --arena-surface-muted: #1c2638;
    --arena-border: #2a3548;
    --arena-text: #e8edf5;
    --arena-text-muted: #9aa8bc;
    --arena-navbar-bg: #080d14;
    --arena-navbar-border: rgba(255, 255, 255, 0.05);
    --arena-shadow: 0 0.35rem 1.25rem rgba(0, 0, 0, 0.35);
}

body.arena-app {
    background: var(--arena-bg);
    color: var(--arena-text);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.arena-navbar {
    background: var(--arena-navbar-bg) !important;
    border-bottom: 1px solid var(--arena-navbar-border);
    box-shadow: var(--arena-shadow);
}

.arena-brand {
    color: #fff !important;
    text-decoration: none;
}

.arena-brand:hover {
    color: #fff !important;
    opacity: 0.92;
}

.arena-logo {
    flex: 0 0 auto;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(79, 140, 255, 0.35);
}

.arena-brand-text {
    letter-spacing: 0.01em;
}

.arena-theme-toggle {
    min-width: 2.5rem;
    line-height: 1.1;
    padding: 0.25rem 0.5rem;
}

[data-theme="dark"] .card,
[data-theme="dark"] .list-group-item,
[data-theme="dark"] .accordion-item {
    background-color: var(--arena-surface);
    color: var(--arena-text);
    border-color: var(--arena-border);
}

[data-theme="dark"] .card-header,
[data-theme="dark"] .card-footer,
[data-theme="dark"] .accordion-button {
    background-color: var(--arena-surface-muted);
    color: var(--arena-text);
    border-color: var(--arena-border);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    background-color: var(--arena-surface-muted);
    color: var(--arena-text);
}

[data-theme="dark"] .accordion-button::after {
    filter: invert(0.85);
}

[data-theme="dark"] .table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--arena-text);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.03);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.05);
    border-color: var(--arena-border);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select,
[data-theme="dark"] .input-group-text {
    background-color: var(--arena-surface-muted);
    border-color: var(--arena-border);
    color: var(--arena-text);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--arena-surface-muted);
    color: var(--arena-text);
}

[data-theme="dark"] .text-muted,
[data-theme="dark"] .form-text {
    color: var(--arena-text-muted) !important;
}

[data-theme="dark"] .border,
[data-theme="dark"] .border-top,
[data-theme="dark"] .border-bottom,
[data-theme="dark"] .model-check {
    border-color: var(--arena-border) !important;
}

[data-theme="dark"] .model-check:has(input:checked) {
    background: rgba(79, 140, 255, 0.12);
    border-color: var(--arena-accent) !important;
}

[data-theme="dark"] .bg-light,
[data-theme="dark"] .bg-white {
    background-color: var(--arena-surface-muted) !important;
}

[data-theme="dark"] .alert-secondary {
    background-color: var(--arena-surface-muted);
    border-color: var(--arena-border);
    color: var(--arena-text);
}

[data-theme="dark"] .alert-light {
    background-color: var(--arena-surface-muted);
    border-color: var(--arena-border);
    color: var(--arena-text);
}

[data-theme="dark"] .btn-link.text-dark {
    color: var(--arena-text) !important;
}

[data-theme="dark"] .navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.82);
}

[data-theme="dark"] .navbar-dark .navbar-nav .nav-link:hover {
    color: #fff;
}

[data-theme="dark"] .arena-col,
[data-theme="dark"] .vote-bar {
    background: var(--arena-surface);
    border-color: var(--arena-border);
}

[data-theme="dark"] .arena-col-header,
[data-theme="dark"] .arena-col-footer {
    background: var(--arena-surface-muted);
    border-color: var(--arena-border);
}

[data-theme="dark"] .markdown-body pre {
    background: #0f1623;
    color: #e2e8f0;
}

[data-theme="dark"] .arena-cost-detail {
    border-top-color: var(--arena-border);
}

[data-theme="dark"] .arena-cost-note {
    color: var(--arena-text-muted);
}

[data-theme="dark"] .full-bench-response-preview,
[data-theme="dark"] .fb-domain-card,
[data-theme="dark"] .fb-share-card {
    background: var(--arena-surface-muted);
    border-color: var(--arena-border) !important;
}

[data-theme="dark"] .fb-podium-1,
[data-theme="dark"] .fb-podium-2,
[data-theme="dark"] .fb-podium-3 {
    background: var(--arena-surface);
}

[data-theme="dark"] details.cost-explainer,
[data-theme="dark"] details.elo-explainer {
    color: var(--arena-text-muted);
}

[data-theme="dark"] .list-group-item-action:hover {
    background-color: var(--arena-surface-muted);
    color: var(--arena-text);
}

[data-theme="dark"] .arena-footer {
    background-color: var(--arena-surface);
}

[data-theme="dark"] .arena-footer summary:hover {
    color: #fff !important;
}

/* ——— Admin tabs ——— */
.arena-admin-tabs {
    border-bottom: 2px solid var(--arena-border);
    gap: 0.25rem;
    padding-left: 0;
}

.arena-admin-tabs .nav-item {
    margin-bottom: 0;
}

.arena-admin-tabs .nav-link {
    color: var(--arena-text-muted);
    border: 1px solid transparent;
    border-radius: 0.5rem 0.5rem 0 0;
    padding: 0.6rem 1.1rem;
    font-weight: 500;
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.arena-admin-tabs .nav-link:hover {
    color: var(--arena-text);
    background-color: var(--arena-surface-muted);
    border-color: var(--arena-border) var(--arena-border) transparent;
}

.arena-admin-tabs .nav-link.active {
    color: var(--arena-accent);
    background-color: var(--arena-surface);
    border-color: var(--arena-border);
    border-bottom-color: var(--arena-surface);
}

[data-theme="dark"] .arena-admin-tabs .nav-link {
    color: var(--arena-text-muted);
}

[data-theme="dark"] .arena-admin-tabs .nav-link:hover {
    color: #fff;
    background-color: var(--arena-surface-muted);
}

[data-theme="dark"] .arena-admin-tabs .nav-link.active {
    color: #fff;
    background-color: var(--arena-surface);
}

/* ——— Admin card tweaks ——— */
.arena-admin-tabs + .card {
    border-radius: 0 0 0.5rem 0.5rem;
}

.arena-prompt-bar {
    background: linear-gradient(135deg, #0d6efd 0%, #6610f2 100%);
    color: #fff;
    border-radius: 0.5rem;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.arena-columns {
    display: grid;
    gap: 1rem;
    align-items: stretch;
}

.arena-col {
    background: var(--arena-surface);
    border: 1px solid var(--arena-border);
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    min-height: 320px;
    overflow: hidden;
}

.arena-col-header {
    background: var(--arena-surface-muted);
    border-bottom: 1px solid var(--arena-border);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
}

.arena-col-body {
    padding: 1rem;
    flex: 1;
    overflow: auto;
    max-height: 480px;
}

.arena-col-footer {
    border-top: 1px solid var(--arena-border);
    padding: 0.75rem 1rem;
    background: var(--arena-surface-muted);
    font-size: 0.875rem;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 { font-size: 1.1rem; margin-top: 0.75rem; }
.markdown-body pre { background: #f1f3f5; padding: 0.75rem; border-radius: 0.375rem; overflow-x: auto; }
.markdown-body code { font-size: 0.85em; }
.markdown-body p:last-child { margin-bottom: 0; }

.model-check:has(input:checked) {
    border-color: #0d6efd !important;
    background: rgba(13, 110, 253, 0.06);
}

.model-check {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.model-check .form-check-input {
    flex: 0 0 auto;
}

.model-card-body {
    flex: 1 1 auto;
    position: relative;
    padding-right: 2rem;
    min-width: 0;
}

.model-info-btn {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 0.85rem;
    line-height: 1.2;
    padding: 0.1rem 0.35rem;
}

.vote-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--arena-surface);
    border: 1px dashed var(--arena-border);
    border-radius: 0.5rem;
}

.vote-bar.voted {
    border-style: solid;
    border-color: #198754;
    background: rgba(25, 135, 84, 0.08);
}

.history-entry .markdown-body {
    max-height: 200px;
    overflow: hidden;
}

.arena-cost-detail {
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px dashed var(--arena-border);
    font-size: 0.8rem;
    line-height: 1.45;
}

.arena-cost-total {
    margin-bottom: 0.35rem;
}

.arena-cost-lines {
    margin: 0;
    padding-left: 1.1rem;
}

.arena-cost-formula {
    margin: 0.35rem 0;
}

.arena-cost-formula code {
    font-size: 0.75rem;
    word-break: break-word;
}

.arena-cost-note {
    font-size: 0.72rem;
    color: var(--arena-text-muted);
}

.full-bench-prompts-table {
    max-height: 280px;
    overflow-y: auto;
}

.full-bench-metrics-table th,
.full-bench-metrics-table td {
    white-space: nowrap;
}

.full-bench-response-preview {
    background: #f8f9fa;
    border-radius: 0.375rem;
    padding: 0.5rem;
    max-height: 200px;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ——— Benchmark complet : rapport & graphiques ——— */
.fb-report-hero {
    background: linear-gradient(135deg, #0d6efd 0%, #6610f2 55%, #6f42c1 100%);
}

.fb-report-hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.25rem 0.65rem;
    border-radius: 2rem;
}

.fb-kpi-card .card-body {
    padding: 1.25rem 0.75rem;
}

.fb-kpi-icon {
    font-size: 1.5rem;
    margin-bottom: 0.35rem;
}

.fb-kpi-value {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.2;
}

.fb-kpi-label {
    font-size: 0.8rem;
    color: var(--arena-text-muted);
    margin-top: 0.25rem;
}

.fb-podium-1 {
    background: linear-gradient(180deg, #fff9e6 0%, #fff 100%);
    border: 2px solid #ffc107;
}

.fb-podium-2 {
    background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
    border: 2px solid #adb5bd;
}

.fb-podium-3 {
    background: linear-gradient(180deg, #fff4ed 0%, #fff 100%);
    border: 2px solid #fd7e14;
}

.fb-podium-medal {
    font-size: 2rem;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.fb-domain-card {
    background: var(--arena-surface-muted);
}

.fb-domain-progress .progress-bar {
    background: linear-gradient(90deg, #0d6efd, #6610f2);
}

.fb-share-card {
    background: linear-gradient(180deg, rgba(79, 140, 255, 0.08) 0%, var(--arena-surface) 100%);
    border: 1px solid rgba(79, 140, 255, 0.25) !important;
}

.fb-report-page main .card {
    border-radius: 0.65rem;
}

/* ——— Footer ——— */
.arena-footer {
    border-top: 1px solid var(--arena-border);
    padding: 2rem 0 1.5rem;
    margin-top: 2rem;
    background: var(--arena-surface);
}

.arena-footer-heading {
    letter-spacing: 0.06em;
}

.arena-footer a {
    transition: color 0.15s ease;
}

.arena-footer a:hover {
    color: var(--arena-accent) !important;
}

.arena-footer-detail summary {
    cursor: pointer;
    user-select: none;
    padding: 0.15rem 0;
}

.arena-footer-detail summary:hover {
    color: var(--arena-text) !important;
}

.arena-footer-list {
    padding-left: 1.1rem;
    margin: 0;
}

.arena-footer-list li {
    margin-bottom: 0.15rem;
}

.arena-footer-version {
    display: flex;
    align-items: baseline;
}

.arena-footer-bottom {
    border-top: 1px solid var(--arena-border);
}