:root {
    color-scheme: light dark;
}
body { font-family: sans-serif; max-width: 1200px; margin: 2rem auto; padding: 0 1rem; line-height: 1.5; }
.controls { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: end; }
.optionsRow {
    margin-top: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}
.advancedOptions {
    margin-top: 0.75rem;
}
.advancedOptions summary {
    cursor: pointer;
    font-weight: 600;
}
.advancedGrid {
    margin-top: 0.6rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0.75rem 1rem;
}
.advancedGrid label {
    margin-bottom: 0;
}
.advancedWarning {
    margin: 0.55rem 0 0;
    font-size: 0.9rem;
    color: #b45309;
}
.optionsRow label { margin: 0; font-weight: 500; }
.optionsRow input[type="checkbox"] { width: auto; margin-right: 0.35rem; }
.sizeInput {
    width: 110px;
    margin-left: 0.35rem;
}
.control-group { flex: 1 1 420px; }
label { display: inline-block; margin-bottom: 0.35rem; font-weight: 600; }
input, button { padding: 0.55rem; font-size: 1rem; }
input { width: 100%; box-sizing: border-box; }
button { cursor: pointer; }
button[disabled] { cursor: not-allowed; opacity: 0.75; }
#status { margin-top: 1rem; font-style: italic; color: #555; }
#resultContainer { margin-top: 2rem; }
.outputGrid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.pane { min-width: 0; }
textarea { width: 100%; height: 460px; font-family: monospace; font-size: 0.9rem; white-space: pre; overflow: auto; box-sizing: border-box; }
.preview {
    height: 460px;
    overflow: auto;
    border: 1px solid #8884;
    border-radius: 4px;
    padding: 0.85rem;
}
.preview h1, .preview h2, .preview h3 { margin-top: 1rem; margin-bottom: 0.5rem; }
.preview p { margin: 0.5rem 0; }
.preview ul { margin: 0.5rem 0 0.5rem 1.25rem; }
.preview ol { margin: 0.5rem 0 0.5rem 1.25rem; }
.preview blockquote {
    margin: 0.5rem 0;
    padding-left: 0.75rem;
    border-left: 3px solid #8886;
}
.preview hr {
    border: 0;
    border-top: 1px solid #8885;
    margin: 0.8rem 0;
}
.preview pre {
    margin: 0.6rem 0;
    background: #00000012;
    padding: 0.65rem;
    border-radius: 4px;
    overflow: auto;
}
.preview code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.preview a { text-decoration: underline; }
.error { color: red; }
.warning { color: orange; }
.success { color: #1f7a1f; }
.stats { margin-top: 0.5rem; font-size: 0.9rem; }
.actions { margin-top: 0.6rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.viewControls {
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.viewControls select {
    padding: 0.4rem 0.5rem;
    font-size: 0.95rem;
}
.outputGrid.mode-raw { grid-template-columns: 1fr; }
.outputGrid.mode-preview { grid-template-columns: 1fr; }
.outputGrid.mode-raw .pane.previewPane,
.outputGrid.mode-preview .pane.rawPane { display: none; }
.hidden { display: none; }
@media (max-width: 960px) {
    .outputGrid { grid-template-columns: 1fr; }
    textarea, .preview { height: 360px; }
}