.calc-remove { background: none; border: 1px solid #ccc; color: #999; width: 30px; height: 30px; border-radius: 50%; cursor: pointer; font-size: 18px; line-height: 1; transition: all 0.2s; }
.calc-remove:hover { border-color: #e74c3c; color: #e74c3c; }















.formula-block { background: #f8f8f8; border-left: 3px solid #0d8059; padding: 15px 20px; margin: 15px 0; border-radius: 0 6px 6px 0; }
.formula-block .formula { font-size: 16px; color: #0d8059; margin: 8px 0; font-family: 'Courier New', monospace; }

@media (max-width: 600px) {     .bk-table th, .bk-table td { padding: 6px 4px; } }

.calc-input-error {
    border-color: #e74c3c !important;
}

.calc-input-wide {
    width: 140px;
}

.roi-positive {
    background: #f0faf5;
    border: 2px solid #2ecc71;
}
.roi-positive .calc-summary-value { color: #1a9a5a; }

.roi-negative {
    background: #fdf0f0;
    border: 2px solid #e74c3c;
}
.roi-negative .calc-summary-value { color: #c0392b; }

.roi-neutral {
    background: #f8f8f8;
    border: 2px solid #ddd;
}
.roi-neutral .calc-summary-value { color: #666; }

.roi-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin: 16px 0;
}

.roi-stat-item {
    background: #f8f8f8;
    border: 1px solid #eee;
    border-radius: 8px;
    padding: 14px;
    text-align: center;
}

.roi-stat-value {
    font-size: 22px;
    font-weight: bold;
    color: #333;
}

.roi-stat-label {
    font-size: 12px;
    color: #888;
    margin-top: 4px;
}

.roi-level-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.roi-level-table th {
    background: #f5f5f5;
    padding: 10px;
    text-align: left;
    color: #666;
    font-size: 12px;
    font-weight: 600;
    border-bottom: 2px solid #ddd;
}

.roi-level-table td {
    padding: 8px 10px;
    border-bottom: 1px solid #eee;
    color: #333;
    font-size: 13px;
}

.roi-level-table tr:hover td {
    background: #f9f9f9;
}

.roi-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: bold;
}

.roi-badge.negative { background: #fde8e8; color: #c0392b; }
.roi-badge.low { background: #fef5e7; color: #c07b10; }
.roi-badge.good { background: #e8f8f0; color: #1a9a5a; }
.roi-badge.high { background: #d4f0e5; color: #0d8059; }

@media (max-width: 600px) {
    .roi-stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}