html,body,#root{margin:0;width:100%;min-height:100%}:root{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#101828;background:#f4f6fa}*{box-sizing:border-box}body{margin:0}.container{min-height:100vh;padding:1rem}.center{display:grid;place-items:center}.card{background:#fff;border-radius:14px;border:1px solid #e5e7eb;box-shadow:0 2px 12px #1018280a;padding:1rem}.auth{width:min(420px,100%)}label{display:grid;gap:.35rem;margin-bottom:.75rem;font-size:.95rem}input,button{font:inherit}input{width:100%;padding:.65rem .75rem;border-radius:10px;border:1px solid #d0d5dd}button{border:none;border-radius:10px;padding:.6rem .85rem;cursor:pointer;background:#2563eb;color:#fff}button.secondary{background:#e5e7eb;color:#111827}button:disabled{opacity:.6;cursor:not-allowed}.row{display:flex;gap:.5rem;align-items:center}.spread{justify-content:space-between}.error{color:#b42318;margin:0 0 .5rem}.hint{color:#667085}.app-grid{display:grid;grid-template-columns:300px 1fr;gap:1rem}.sidebar{display:flex;flex-direction:column;gap:.75rem}.create-room input{flex:1}.room-list{list-style:none;margin:0;padding:0;display:grid;gap:.4rem;overflow:auto}.room{width:100%;text-align:left;background:#f8fafc;color:#111827;border:1px solid #e5e7eb;display:grid;gap:.15rem}.room.active{border-color:#2563eb;background:#eef4ff}.room span{color:#667085;font-size:.8rem}.chat{display:grid;grid-template-rows:auto 1fr auto;min-height:calc(100vh - 2rem)}.chat-header{padding-bottom:.75rem;border-bottom:1px solid #eaecf0}.messages{overflow:auto;padding:.75rem 0;display:grid;gap:.75rem}.message{border:1px solid #eaecf0;border-radius:10px;padding:.65rem .75rem;background:#fcfcfd}.message p{margin:.35rem 0 0;white-space:pre-wrap}.meta{display:flex;justify-content:space-between;gap:.5rem;font-size:.85rem;color:#667085}.message-form{padding-top:.5rem;border-top:1px solid #eaecf0}.message-form input{flex:1}@media(max-width:900px){.app-grid{grid-template-columns:1fr}.chat{min-height:65vh}}