/* RegExp tester */
.regex-tester-tool { padding: 1rem 0; }

.rt-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 1rem 0 2rem;
}

.rt-panel { display: flex; flex-direction: column; gap: 1rem; }
.rt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.rt-box {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.rt-mods {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    margin: 0.5rem 0 0.75rem;
}

.rt-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.rt-actions .btn { min-width: 180px; flex: 1; }

.rt-results {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.rt-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin: 0.75rem 0 1rem;
}

.rt-card {
    padding: 0.9rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.rt-card .label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.rt-card strong {
    font-family: 'Courier New', monospace;
    font-weight: 900;
    font-size: 1.05rem;
    word-break: break-word;
}

.rt-section { margin-top: 1.25rem; }
.rt-section h4 { margin: 0 0 0.6rem 0; }

.rt-pre {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem;
    overflow: auto;
    max-height: 360px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
}

.rt-details {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem;
}

.rt-item { padding: 0.5rem 0; border-bottom: 1px solid var(--border-color); }
.rt-item:last-child { border-bottom: none; }
.rt-item .k { color: var(--text-secondary); font-size: 0.9rem; }
.rt-item .v { font-family: 'Courier New', monospace; font-weight: 800; white-space: pre-wrap; }

.muted { color: var(--text-secondary); }

@media (max-width: 992px) {
    .rt-layout { grid-template-columns: 1fr; }
    .rt-grid { grid-template-columns: 1fr; }
    .rt-cards { grid-template-columns: 1fr; }
}