:root {
    --border:#ddd;
    --muted:#666;
    --accent:#0b72ff;
    --bg:#fafafa;
}
body {
    font-family: Arial, sans-serif;
    margin:0;
    background:var(--bg);
    color:#111;
}
header {
    padding:1rem 1.25rem;
    background:#fff;
    border-bottom:1px solid var(--border);
}
h1 {
    margin:0;
    font-size:1.2rem;
}
.sub {
    color:var(--muted);
    font-size:.95rem;
    margin-top:.25rem;
}
.wrap {
    /*max-width: 980px;*/
    margin: 0 auto;
    padding: 1rem 1.25rem 2rem;
}

.tabs {
    display:flex;
    gap:.5rem;
    flex-wrap:wrap;
    margin:.75rem 0 1rem;
}
.tab-btn {
    border:1px solid var(--border);
    background:#fff;
    padding:.55rem .9rem;
    border-radius:.5rem;
    cursor:pointer;
    font-weight:600;
}
.tab-btn[aria-selected="true"] {
    border-color:var(--accent);
    color:#fff;
    background:var(--accent);
}

.panel {
    display:none;
    background:#fff;
    border:1px solid var(--border);
    border-radius:.75rem;
    padding:1rem;
}
.panel.active {
    display:block;
}

/* --- Split layout dla wszystkich paneli --- */
.panel--split {
  display:none;              /* <-- poprawka: domyślnie ukryte */
  background:#fff;
  border:1px solid var(--border);
  border-radius:.75rem;
  padding:1rem;

  gap: 1rem;
  height: calc(100vh - 140px);
  min-height: 420px;
}
.panel--split.active {
  display:flex;              /* <-- tylko aktywny panel jest flex */
}

.split-left {
  flex: 0 0 75%;   /* zajmuje 75% szerokości */
  width: 75%;      /* na wszelki wypadek */
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.split-right {
  flex: 1;         /* reszta, czyli ~25% */
  min-width: 0;
  /*display: flex;*/
}
.preview-card {
  border:1px solid var(--border);
  background:#fff;
  border-radius:.75rem;
  padding:.75rem;
  display:flex;
  flex-direction:column;
  width:100%;
    aspect-ratio: 1 / 1;   /* zawsze kwadrat */
}
.preview-card h3 { margin:.2rem 0 .75rem; font-size:1.05rem; }
.preview-frame {
  border: 1px solid var(--border);
  border-radius: .5rem;
  width: 100%;
  height: 100%;
  min-height: 300px;
  pointer-events: none; /* podgląd „tylko do oglądania” */
}
@media (max-width: 980px){
  .panel--split { flex-direction: column; height: auto; }
  .split-left { width:100%; flex: 0 0 auto; }
  .split-right { height: 50vh; }
}

.row {
    margin:.75rem 0;
    display:flex;
    align-items:center;
    gap:.75rem;
    flex-wrap:wrap;
}
label {
    font-weight:600;
}
select, button {
    padding:.6rem .8rem;
    font-size:1rem;
    border:1px solid var(--border);
    border-radius:.5rem;
    background:#fff;
}
button.primary {
    background:var(--accent);
    color:#fff;
    border-color:var(--accent);
}
button.warn {
    background:#c00;
    color:#fff;
    border-color:#a00;
}
button.ghost {
    background:#fff;
}
button:disabled {
    opacity:.6;
    cursor:not-allowed;
}

.grid2 {
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:1rem;
}
@media (max-width:860px){
    .grid2{
        grid-template-columns:1fr;
    }
}
.card {
    border:1px solid var(--border);
    border-radius:.6rem;
    padding:1rem;
}
.card h3 {
    margin:.2rem 0 1rem;
    font-size:1.05rem;
}
.meter {
    width:100%;
    height:12px;
    background:#eee;
    border-radius:999px;
    overflow:hidden;
}
.meter>div {
    height:100%;
    width:0%;
    background:#22b573;
    transition:width .08s linear;
}
.kv {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
.muted {
    color:#666;
}
.hint {
    color:#666;
    font-size:.95rem;
    margin-top:.4rem;
}
.kbd {
    background:#f3f3f3;
    border:1px solid #ddd;
    border-bottom-width:2px;
    border-radius:4px;
    padding:0 .35rem;
}
.sep {
    height:1px;
    background:var(--border);
    margin:1rem 0;
}
.kbd-flash {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}