*{box-sizing:border-box}body{margin:0}code{background:#e5e7eb;border-radius:4px;padding:.1rem .3rem}:root{color:#111827;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}body{background:#eef2f7;margin:0}.container{max-width:1200px;margin:0 auto;padding:1rem}.topbar{justify-content:space-between;align-items:center;margin-bottom:.75rem;display:flex}.topbar-right{align-items:center;gap:.5rem;display:flex}.topbar h1{margin:0;font-size:1.5rem}.status{color:#475569;margin:0;font-size:.9rem}.logout-btn{background:#0f172a;padding:.45rem .65rem;font-size:.85rem}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:1rem}form{gap:.5rem;display:grid}input{border:1px solid #d1d5db;border-radius:8px;padding:.55rem .65rem}button{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:8px;padding:.6rem .9rem}.chat-layout{grid-template-columns:320px 1fr;gap:1rem;margin-top:1rem;display:grid}.chats{flex-direction:column;gap:.75rem;max-height:76vh;display:flex}.chats-header{justify-content:space-between;align-items:center;display:flex}.chats-header h2{margin:0}.new-chat-btn{border-radius:999px;width:36px;height:36px;padding:0;font-size:1.2rem;line-height:1}.chat-search{width:100%;margin-bottom:.25rem}.chats ul{gap:.4rem;margin:0;padding:0;list-style:none;display:grid;overflow:auto}.chats button{text-align:left;color:#111827;background:#f3f4f6;border:1px solid #e5e7eb;flex-direction:column;align-items:flex-start;gap:.2rem;width:100%;display:flex}.thread-title{font-weight:600}.thread-sub{color:#6b7280;font-size:.8rem}.chats button.active{color:#0f172a;background:#dbeafe;border-color:#93c5fd}.messages{min-height:76vh}.messages ol{max-height:56vh;margin:.8rem 0;padding-left:1.2rem;overflow:auto}.row{grid-template-columns:1fr auto;gap:.5rem;display:grid}@media (width<=900px){.chat-layout{grid-template-columns:1fr}.messages,.chats{min-height:auto;max-height:none}}