:root{
  --bg:#0b1220; --card:#0f1b33; --muted:#90a4c0; --txt:#eaf2ff;
  --b:#243a63; --a:#4aa3ff;
}
*{box-sizing:border-box;font-family:system-ui,Segoe UI,Roboto,Arial}
body{margin:0;background:var(--bg);color:var(--txt)}
.top{position:sticky;top:0;display:flex;justify-content:space-between;align-items:center;
  padding:12px 14px;background:#081027;border-bottom:1px solid var(--b);z-index:10}
.brand{font-weight:800;letter-spacing:.5px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
button{background:var(--a);border:0;color:#031027;font-weight:700;padding:8px 10px;border-radius:10px;cursor:pointer}
button:hover{filter:brightness(1.05)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:12px}
.panel{background:var(--card);border:1px solid var(--b);border-radius:14px;padding:12px;min-height:280px}
.panel.wide{grid-column:1 / -1;min-height:220px}
h3{margin:0 0 10px 0}
input,textarea{width:100%;background:#071026;color:var(--txt);border:1px solid #1b2f57;border-radius:12px;padding:10px}
textarea{min-height:220px;resize:vertical}
pre{background:#071026;border:1px solid #1b2f57;border-radius:12px;padding:10px;min-height:220px;overflow:auto;white-space:pre-wrap}
.hint{margin-top:8px;color:var(--muted);font-size:12px}
.chip{border:1px solid #1b2f57;border-radius:999px;padding:6px 10px;color:var(--muted)}