.chat-layout{display:grid;grid-template-columns:240px 1fr;gap:1rem;height:calc(100vh - 140px);min-height:400px}.chat-rail{display:flex;flex-direction:column;gap:.5rem;border-right:1px solid #e5e7eb;padding-right:.75rem;overflow:hidden}.chat-newbtn{padding:.5rem .75rem;border:1px solid #d1d5db;border-radius:6px;background:#f9fafb;cursor:pointer;font-weight:600}.chat-newbtn:hover:not(:disabled){background:#f3f4f6}.chat-threadlist{overflow-y:auto;display:flex;flex-direction:column;gap:2px}.chat-thread{display:flex;align-items:center;border-radius:6px}.chat-thread-active{background:#eef2ff}.chat-thread-open{flex:1;text-align:left;padding:.4rem .5rem;border:none;background:transparent;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.9rem}.chat-thread-del{padding:0 .4rem;font-size:1.1rem;line-height:1;color:#9ca3af}.chat-empty-rail{font-size:.85rem;padding:.4rem .5rem}.chat-main{display:flex;flex-direction:column;min-height:0}.chat-scroll{flex:1;overflow-y:auto;padding:.5rem}.chat-welcome{max-width:640px;margin:2rem auto}.chat-suggestions{display:grid;gap:.5rem;margin-top:1rem}.chat-suggestion{text-align:left;padding:.6rem .8rem;border:1px solid #e5e7eb;border-radius:8px;background:#fff;cursor:pointer}.chat-suggestion:hover{background:#f9fafb}.chat-transcript{display:flex;flex-direction:column;gap:.75rem;max-width:820px;margin:0 auto}.chat-row{display:flex}.chat-row-user{justify-content:flex-end}.chat-row-assistant,.chat-row-tool{justify-content:flex-start}.chat-row-tool{padding-left:.25rem}.chat-bubble{border-radius:12px;padding:.5rem .85rem;max-width:85%}.chat-bubble-user{background:#4f46e5;color:#fff;white-space:pre-wrap}.chat-bubble-assistant{background:#f3f4f6;color:#111827}.chat-tools{font-size:.8rem;font-style:italic}.chat-composer{display:flex;gap:.5rem;padding-top:.5rem;border-top:1px solid #e5e7eb}.chat-input{flex:1;resize:vertical;padding:.5rem .75rem;border:1px solid #d1d5db;border-radius:8px;font:inherit}.chat-send{padding:0 1.1rem;border:none;border-radius:8px;background:#4f46e5;color:#fff;font-weight:600;cursor:pointer}.chat-send:disabled{opacity:.5;cursor:default}.chat-error{color:#b91c1c;margin-top:.5rem}.chat-notice{max-width:560px;margin:2rem auto}.chat-md>:first-child{margin-top:0}.chat-md>:last-child{margin-bottom:0}.chat-p{margin:.4rem 0;line-height:1.5}.chat-h{margin:.6rem 0 .3rem}.chat-code{background:rgba(0,0,0,.06);padding:.1em .3em;border-radius:4px;font-size:.9em}.chat-pre{background:#1f2937;color:#f9fafb;padding:.75rem;border-radius:8px;overflow-x:auto}.chat-pre code{background:none;color:inherit}.chat-table{border-collapse:collapse;margin:.5rem 0;font-size:.9rem}.chat-table td,.chat-table th{border:1px solid #d1d5db;padding:.3rem .6rem;text-align:left}.chat-table th{background:#e5e7eb}