:root{color-scheme:dark;--bg:#0c0f14;--panel:#121720;--panel2:#181f2b;--line:#273040;--text:#f5f7fb;--muted:#8e99aa;--accent:#66e3bb;--accent2:#45c99f;--danger:#ff6b78;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100dvh}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}.hidden{display:none!important}.auth-shell{min-height:100dvh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% 0,#17362f 0,transparent 42%)}.auth-card{width:min(100%,400px);padding:34px;border:1px solid var(--line);border-radius:24px;background:rgba(18,23,32,.94);box-shadow:0 24px 80px #0008;text-align:center}.brand-mark{width:62px;height:62px;margin:auto;display:grid;place-items:center;border-radius:19px;background:linear-gradient(145deg,var(--accent),#3b9fda);color:#07110e;font-weight:900;font-size:27px}.auth-card h1{margin:16px 0 4px;font-size:30px}.muted,.auth-card small{color:var(--muted)}.tabs{display:flex;margin:28px 0 20px;background:#0b0e13;border-radius:12px;padding:4px}.tab{flex:1;border:0;background:transparent;padding:9px;border-radius:9px;color:var(--muted)}.tab.active{background:var(--panel2);color:var(--text)}label{display:block;text-align:left;color:#bac2cf;font-size:13px;margin:14px 0}input,textarea{display:block;width:100%;margin-top:7px;border:1px solid var(--line);border-radius:12px;background:#0c1016;padding:13px;outline:none}input:focus,textarea:focus{border-color:var(--accent)}.primary{width:100%;border:0;border-radius:12px;background:var(--accent);color:#07110e;font-weight:800;padding:13px;margin-top:12px}.primary:hover,.send:hover{background:var(--accent2)}.security-note{color:var(--muted);font-size:12px;margin:22px 0 0}.error{color:var(--danger);font-size:13px;min-height:18px}.app{display:grid;grid-template-columns:330px 1fr;height:100dvh}.sidebar{background:var(--panel);border-right:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column}.sidebar header,.chat-header{min-height:70px;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header small{display:block;color:var(--muted);margin-top:3px}.icon-btn{border:0;background:transparent;font-size:23px;color:var(--muted)}.new-chat{margin:16px;border:1px solid #377964;background:#163a31;color:var(--accent);border-radius:12px;padding:11px}.conversation-list{overflow:auto}.conversation{width:100%;border:0;border-left:3px solid transparent;background:transparent;display:flex;gap:12px;text-align:left;padding:15px 16px}.conversation:hover,.conversation.active{background:var(--panel2);border-left-color:var(--accent)}.avatar{width:42px;height:42px;border-radius:50%;background:#293c49;display:grid;place-items:center;color:var(--accent);font-weight:800;flex:none}.conversation .meta{min-width:0}.conversation .preview{color:var(--muted);font-size:12px;margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat{min-width:0;background:linear-gradient(#10151d,#0c0f14)}.empty{height:100%;display:grid;place-content:center;text-align:center;color:var(--muted)}.empty h2{color:var(--text);margin-bottom:0}.shield{font-size:70px;color:var(--accent)}.chat-view{height:100%;display:flex;flex-direction:column}.chat-header{background:#10151d}.chat-header>div{flex:1}.danger-text{border:0;background:transparent;color:var(--danger)}.messages{flex:1;overflow:auto;padding:24px max(18px,calc((100% - 800px)/2));display:flex;flex-direction:column;gap:10px}.message{max-width:76%;align-self:flex-start}.message.mine{align-self:flex-end}.bubble{background:var(--panel2);border:1px solid var(--line);border-radius:5px 17px 17px 17px;padding:10px 13px;white-space:pre-wrap;overflow-wrap:anywhere}.mine .bubble{background:#17473a;border-color:#286a57;border-radius:17px 5px 17px 17px}.message footer{font-size:10px;color:var(--muted);margin:4px 5px}.mine footer{text-align:right}.recall{border:0;background:transparent;color:var(--muted);font-size:10px;padding:0 4px}.recalled .bubble{color:var(--muted);font-style:italic}.composer{display:flex;align-items:flex-end;gap:10px;padding:12px max(16px,calc((100% - 820px)/2));background:#10151d;border-top:1px solid var(--line);padding-bottom:max(12px,env(safe-area-inset-bottom))}.composer textarea{resize:none;max-height:130px;margin:0}.send{border:0;background:var(--accent);color:#07110e;width:44px;height:44px;border-radius:50%;font-size:22px}.shredded{padding:13px;text-align:center;color:#ffd1d5;background:#5b202755}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);background:#edf5f2;color:#111;padding:10px 16px;border-radius:10px;opacity:0;pointer-events:none;transition:.2s;z-index:9}.toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:0;padding:0;border-radius:18px;background:var(--panel);color:var(--text);width:min(92vw,440px)}dialog::backdrop{background:#000a;backdrop-filter:blur(4px)}.dialog-card{padding:20px}.dialog-card header{display:flex;justify-content:space-between;align-items:center}.search-results{max-height:330px;overflow:auto}.result{display:flex;align-items:center;gap:12px;width:100%;padding:12px;border:0;border-radius:10px;background:transparent;text-align:left}.result:hover{background:var(--panel2)}.mobile{display:none}@media(max-width:700px){.app{display:block}.sidebar{height:100%;border:0}.chat{position:fixed;inset:0;transform:translateX(100%);transition:.2s;z-index:2}.app.chat-open .chat{transform:none}.mobile{display:block}.chat-header{padding-left:8px}.message{max-width:88%}}