body {
    background-color: #f8f9fa;
    padding-bottom: 20px;
}

.main-container {
    max-width: 960px;
    margin: 20px auto;
}

.text-area,
.mono-input,
.mono-output {
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.tool-subtitle {
    color: #64748b;
    font-size: 0.9rem;
}

.stats-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.stats-row .text-muted {
    min-height: 20px;
}

.toolbar-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.mini-card {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #fff;
    padding: 14px;
}

.mini-card h6 {
    margin-bottom: 6px;
}

.summary-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}

.summary-chip {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 12px 14px;
}

.summary-chip strong {
    display: block;
    color: #1e293b;
    font-size: 1.05rem;
}

.summary-chip span {
    color: #64748b;
    font-size: 0.85rem;
}

.result-panel {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #fff;
}

.result-panel pre {
    margin: 0;
    padding: 16px;
    max-height: 420px;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.65;
}

.result-list {
    max-height: 420px;
    overflow: auto;
}

.result-list .list-group-item {
    border-left: 0;
    border-right: 0;
}

.result-list .list-group-item:first-child {
    border-top: 0;
}

.result-list .list-group-item:last-child {
    border-bottom: 0;
}

@media (max-width: 767px) {
    .option-grid {
        grid-template-columns: 1fr;
    }
}