/* Responsive Demo (nur diese Seite) */
.rwd-controls{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:16px; }
.rwd-controls .tu-copy[aria-pressed="true"]{ background:var(--red); border-color:var(--red); color:var(--white); }
.rwd-stage{ max-width:100%; margin:0 auto; transition:max-width .4s ease; }
.rwd-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
.rwd-stage[data-mode="tablet"] .rwd-grid{ grid-template-columns:repeat(2,1fr); }
.rwd-stage[data-mode="mobile"] .rwd-grid{ grid-template-columns:1fr; }