/* Backtest panel */
.backtest-header {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.backtest-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.backtest-stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.backtest-stat__label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.backtest-stat__value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Sub-tabs */
.backtest-tabs {
    display: flex;
    gap: 4px;
    margin-top: 12px;
}

.backtest-tab {
    padding: 6px 14px;
    font-size: 0.8rem;
    font-family: inherit;
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.backtest-tab:hover {
    color: var(--text-primary);
}

.backtest-tab--active {
    background: var(--bg-card);
    color: var(--blue);
    border-bottom-color: var(--bg-card);
}

/* Content area */
.backtest-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 12px;
    min-height: 150px;
}

/* Tables */
.backtest-table-wrap {
    overflow-x: auto;
}

.backtest-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

.backtest-table th {
    text-align: left;
    padding: 6px 10px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
}

.backtest-table td {
    padding: 6px 10px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

.backtest-table tr:last-child td {
    border-bottom: none;
}

.backtest-pnl--pos {
    color: var(--red) !important;
    font-weight: 600;
}

.backtest-pnl--neg {
    color: var(--green) !important;
    font-weight: 600;
}

/* ── Group conditions (nested) ── */
.backtest-group {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px;
    margin: 4px 0;
    background: var(--bg-card);
}
.backtest-group .backtest-group {
    margin-left: 12px;
    border-style: dashed;
}
.backtest-group-items {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-height: 4px;
}
.backtest-group-actions {
    display: flex;
    gap: 4px;
    margin-top: 6px;
}
.backtest-group-actions button {
    font-size: 0.7rem;
    padding: 2px 8px;
    background: none;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    cursor: pointer;
}
.backtest-group-actions button:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}
.backtest-group-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0 4px;
    margin-left: auto;
}
.backtest-group-remove:hover {
    color: var(--red);
}

/* Empty state */
.backtest-empty {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 30px 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

/* Strategy cards */
.backtest-strategy-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.backtest-strategy-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.backtest-strategy-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.backtest-strategy-card__name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.backtest-strategy-card__rule {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.backtest-strategy-card__actions {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

/* Strategy form */
.backtest-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.backtest-form__row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.backtest-form__row label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    min-width: 60px;
}

.backtest-form__input {
    flex: 1;
    padding: 5px 8px;
    font-size: 0.82rem;
    font-family: inherit;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}

.backtest-form__input:focus {
    border-color: var(--blue);
}

.backtest-form__select {
    padding: 5px 8px;
    font-size: 0.8rem;
    font-family: inherit;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}

.backtest-form__select:focus {
    border-color: var(--blue);
}

.backtest-form__actions {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

.backtest-condition-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 0;
}

.backtest-condition-row .backtest-form__select {
    flex: 0 0 auto;
}

.backtest-condition-row .backtest-form__input {
    width: 70px;
    flex: none;
}

.backtest-condition-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 2px 6px;
}

.backtest-condition-remove:hover {
    color: var(--red);
}

.backtest-add-condition-btn {
    background: none;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 4px 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    font-family: inherit;
    align-self: flex-start;
}

.backtest-add-condition-btn:hover {
    border-color: var(--text-muted);
    color: var(--text-secondary);
}

/* Logic toggle (AND/OR) */
.logic-toggle {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    line-height: 1;
}

.logic-btn {
    padding: 3px 10px;
    font-size: 0.72rem;
    font-family: inherit;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.logic-btn:hover {
    color: var(--text-primary);
}

.logic-btn--active {
    background: var(--blue);
    color: #fff;
}

.logic-btn--active:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .backtest-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .backtest-stat__value {
        font-size: 0.95rem;
    }
    .backtest-table {
        font-size: 0.7rem;
    }
    .backtest-table th,
    .backtest-table td {
        padding: 4px 6px;
    }
}