.chat-page{display:flex;height:100vh;overflow:hidden}
.chat-sidebar{width:270px;flex:none;background:#0d1212;border-right:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;padding:24px 0}
.chat-sidebar .logo{padding:0 20px 20px;display:flex}
.chat-new{margin:0 20px 18px;background:var(--acid);color:var(--ink);border:none;padding:12px;font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:14px;cursor:pointer;border-radius:2px}
.chat-history{flex:1;overflow-y:auto;padding:0 12px}
.chat-history-item{display:block;width:100%;text-align:left;background:none;border:none;color:#c0c5bd;font-family:'Space Grotesk',sans-serif;font-size:13px;padding:11px 10px;border-radius:2px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-history-item:hover,.chat-history-item.active{background:#1b2322;color:#f0ede5}
.chat-sidebar-footer{padding:12px 20px 0;border-top:1px solid rgba(255,255,255,.1);font:11px 'DM Mono',monospace;color:#7d857f}
.chat-sidebar-footer a{color:#c0c5bd;display:block;margin-top:8px}
.chat-main{flex:1;display:flex;flex-direction:column;background:#121717;min-width:0}
.chat-topbar{display:flex;align-items:center;gap:18px;padding:16px 28px;border-bottom:1px solid rgba(255,255,255,.1)}
.chat-topbar label{font:11px 'DM Mono',monospace;color:#aab5aa;letter-spacing:.05em}
.chat-topbar select{background:#1b2322;color:#f0ede5;border:1px solid #4c5550;padding:9px 12px;font-family:'Space Grotesk',sans-serif;font-size:14px;border-radius:2px;max-width:min(52vw,430px)}
.chat-sort{display:flex;align-items:center;gap:6px;margin-left:auto}
.chat-sort span{font:11px 'DM Mono',monospace;color:#7d857f;letter-spacing:.05em;margin-right:2px}
.chat-sort-btn{background:transparent;color:#aab5aa;border:1px solid #3b443f;padding:6px 11px;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.04em;border-radius:2px;transition:color .18s,border-color .18s,background .18s}
.chat-sort-btn:hover{color:#f0ede5;border-color:#6a746d}
.chat-sort-btn.is-active{background:var(--acid);border-color:var(--acid);color:var(--ink)}
@media(max-width:700px){.chat-topbar{flex-wrap:wrap;gap:10px}.chat-sort{margin-left:0;width:100%}}
.chat-thread{flex:1;overflow-y:auto;padding:32px 10vw;display:flex;flex-direction:column;gap:22px}
.chat-empty{color:#7d857f;margin:auto;text-align:center;font-size:15px;max-width:340px}
.chat-msg{max-width:640px;padding:14px 18px;border-radius:4px;line-height:1.55;font-size:15px;white-space:pre-wrap}
.chat-msg.user{align-self:flex-end;background:var(--acid);color:var(--ink)}
.chat-msg.assistant{align-self:flex-start;background:#1b2322;color:#f0ede5;border:1px solid rgba(255,255,255,.08)}
.chat-msg-meta{font:11px 'DM Mono',monospace;color:#7d857f;margin-bottom:6px}
.chat-inputbar{display:flex;gap:14px;padding:20px 10vw 28px;border-top:1px solid rgba(255,255,255,.1)}
.chat-inputbar textarea{flex:1;resize:none;background:#1b2322;border:1px solid #4c5550;color:#f0ede5;font-family:'Space Grotesk',sans-serif;font-size:15px;padding:14px 16px;border-radius:2px;height:52px}
.chat-inputbar textarea:focus{outline:none;border-color:#d8ff51}
.chat-inputbar button{background:var(--acid);color:var(--ink);border:none;padding:0 24px;font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:14px;border-radius:2px;cursor:pointer}
.chat-inputbar button:disabled{opacity:.5;cursor:default}
@media(max-width:800px){.chat-sidebar{display:none}.chat-thread{padding:24px 5vw}.chat-inputbar{padding:16px 5vw 22px}}