:root{--bg-0:#0a0a0d;--bg-1:#101014;--bg-2:#17171d;--bg-3:#1f1f27;--border:#26262f;--border-soft:#1c1c23;--text-hi:#f2f1f6;--text-mid:#9c9ba8;--text-low:#605f6c;--accent-a:#7c6bff;--accent-b:#00d9c6;--accent-grad:linear-gradient(120deg,#7c6bff,#4f7bff 45%,#00d9c6);--danger:#ff6b6b;--radius-s:8px;--radius-m:12px;--radius-l:18px}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;background:var(--bg-0);color:var(--text-hi);font-family:Inter,-apple-system,sans-serif;overflow:hidden}body{background-image:radial-gradient(circle at 15% 0,rgba(124,107,255,.08),transparent 40%),radial-gradient(circle at 85% 100%,rgba(0,217,198,.06),transparent 45%)}.app{display:flex;height:100vh}.sidebar{width:264px;flex-shrink:0;background:var(--bg-1);border-right:1px solid var(--border-soft);display:flex;flex-direction:column;padding:20px 14px}.brand{display:flex;align-items:center;gap:10px;padding:4px 6px 22px}.brand-mark{width:30px;height:30px;border-radius:9px;object-fit:cover}Ss .brand-name{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:16.5px;letter-spacing:-.02em}.brand-name span{color:var(--accent-b)}.new-chat-btn{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-s);color:var(--text-hi);font-size:13.5px;font-weight:500;cursor:pointer;transition:border-color .15s ease,background .15s ease;margin-bottom:22px}.new-chat-btn:hover{background:var(--bg-3);border-color:#34343f}.new-chat-btn svg{flex-shrink:0}.side-label{font-size:11px;color:var(--text-low);font-weight:600;letter-spacing:.03em;padding:0 8px 8px}.chat-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto;flex:1 1}.chat-item{padding:9px 10px;border-radius:var(--radius-s);font-size:13px;color:var(--text-mid);cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .15s ease,color .15s ease}.chat-item:hover{background:var(--bg-2);color:var(--text-hi)}.chat-item.active{background:var(--bg-3);color:var(--text-hi)}.sidebar-foot{border-top:1px solid var(--border-soft);padding-top:12px;margin-top:10px}.account-row{display:flex;align-items:center;gap:10px;padding:8px;border-radius:var(--radius-s);cursor:pointer;transition:background .15s ease}.account-row:hover{background:var(--bg-2)}.avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,#7c6bff,#00d9c6);display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--bg-0);flex-shrink:0}.account-info{display:flex;flex-direction:column;gap:1px;overflow:hidden}.account-email{font-size:12.5px;color:var(--text-hi);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.account-plan{font-size:11px;color:var(--text-low)}.main{flex:1 1;display:flex;flex-direction:column;min-width:0}.topbar{height:60px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 22px;border-bottom:1px solid var(--border-soft)}.model-picker{position:relative}.model-trigger{display:flex;align-items:center;gap:9px;background:var(--bg-2);border:1px solid var(--border);padding:7px 12px 7px 8px;border-radius:999px;cursor:pointer;transition:border-color .15s ease}.model-trigger:hover{border-color:#3a3a46}.model-dot{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;flex-shrink:0}.model-dot svg{width:11px;height:11px}.model-trigger-text{display:flex;flex-direction:column;line-height:1.15}.model-trigger-name{font-size:13px;font-weight:600}.model-trigger-sub{font-size:10.5px;color:var(--text-low)}.chev{color:var(--text-low);margin-left:2px}.model-menu{position:absolute;top:calc(100% + 8px);left:0;width:280px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-m);box-shadow:0 20px 40px -8px rgba(0,0,0,.55);padding:8px;display:none;z-index:20}.model-menu.open{display:block}.model-option{display:flex;align-items:center;gap:11px;padding:9px 10px;border-radius:var(--radius-s);cursor:pointer;transition:background .15s ease}.model-option:hover{background:var(--bg-3)}.model-option.selected{background:rgba(124,107,255,.1)}.model-option-dot{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex-shrink:0}.model-option-dot svg{width:15px;height:15px}.model-option-body{flex:1 1;min-width:0}.model-option-name{font-size:13.5px;font-weight:600;color:var(--text-hi)}.model-option-desc{font-size:11.5px;color:var(--text-low);margin-top:1px}.model-check{color:var(--accent-b);flex-shrink:0;opacity:0}.model-option.selected .model-check{opacity:1}.topbar-right{gap:10px}.pill,.topbar-right{display:flex;align-items:center}.pill{font-size:11.5px;padding:5px 11px;border-radius:999px;border:1px solid var(--border);color:var(--text-mid);gap:6px}.pill .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-b);box-shadow:0 0 6px var(--accent-b)}.chat-area{flex:1 1;overflow-y:auto;display:flex;justify-content:center}.chat-inner{width:100%;max-width:720px;padding:0 24px;display:flex;flex-direction:column}.empty-state{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:70vh;gap:18px}.empty-mark{width:52px;height:52px;border-radius:16px;background:var(--accent-grad);position:relative;display:grid;place-items:center;animation:rise .6s cubic-bezier(.22,1,.36,1)}.empty-mark:after{content:"";width:18px;height:18px;background:var(--bg-0);border-radius:5px;transform:rotate(45deg)}@keyframes rise{0%{opacity:0;transform:translateY(10px) scale(.92)}to{opacity:1;transform:translateY(0) scale(1)}}.empty-title{font-family:Space Grotesk,sans-serif;font-size:24px;font-weight:600;letter-spacing:-.01em}.empty-sub{font-size:14px;color:var(--text-mid);max-width:320px;line-height:1.5}.suggestions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;max-width:480px;margin-top:4px}.suggestion-chip{font-size:12.5px;color:var(--text-mid);border:1px solid var(--border);padding:8px 14px;border-radius:999px;cursor:pointer;transition:border-color .15s ease,color .15s ease}.suggestion-chip:hover{border-color:var(--accent-a);color:var(--text-hi)}.messages{display:flex;flex-direction:column;gap:22px;padding:26px 0 10px}.msg{display:flex;gap:12px;max-width:100%}.msg.user{flex-direction:row-reverse}.msg-avatar{width:26px;height:26px;border-radius:7px;flex-shrink:0;display:grid;place-items:center;font-size:11px;font-weight:700;margin-top:2px}.msg.ai .msg-avatar{background:var(--accent-grad);color:#0a0a0d}.msg.user .msg-avatar{background:var(--bg-3);color:var(--text-mid)}.msg-bubble{font-size:14.5px;line-height:1.6;padding:11px 15px;border-radius:var(--radius-m);max-width:78%}.msg.ai .msg-bubble{background:var(--bg-2);border:1px solid var(--border-soft);border-top-left-radius:4px}.msg.user .msg-bubble{background:rgba(124,107,255,.12);border:1px solid rgba(124,107,255,.25);border-top-right-radius:4px}.composer-wrap{display:flex;justify-content:center;padding:14px 24px 20px}.composer{width:100%;max-width:720px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-l);padding:6px 6px 6px 16px;display:flex;align-items:flex-end;gap:8px;transition:border-color .15s ease}.composer:focus-within{border-color:var(--accent-a)}.composer textarea{flex:1 1;background:transparent;border:none;outline:none;resize:none;color:var(--text-hi);font-family:inherit;font-size:14px;line-height:1.5;padding:10px 0;max-height:160px}.composer textarea::placeholder{color:var(--text-low)}.composer-actions{display:flex;align-items:center;gap:4px}.icon-btn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:var(--text-mid);cursor:pointer;border:none;background:transparent;transition:background .15s ease,color .15s ease}.icon-btn:hover{background:var(--bg-3);color:var(--text-hi)}.send-btn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:var(--accent-grad);color:#0a0a0d;cursor:pointer;border:none;flex-shrink:0}.composer-foot{text-align:center;font-size:11px;color:var(--text-low);padding-top:10px;max-width:720px;margin:0 auto}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:4px}::-webkit-scrollbar-track{background:transparent}@media (max-width:760px){.sidebar{display:none}}.logout-btn{background:none;border:none;color:var(--text-low);font-size:11px;cursor:pointer;padding:0;margin-top:2px;text-align:left}.logout-btn:hover{color:var(--text-hi)}.msg-bubble.typing{color:var(--text-low);font-style:italic}.msg-bubble.error-bubble{background:hsla(0,100%,71%,.08);border-color:hsla(0,100%,71%,.25);color:var(--danger)}