*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-deep:#0a0e1a;--bg-base:#111827;--bg-surface:#1a2236;--bg-raised:#222d44;
  --bg-hover:#2a3650;--border:#2d3a52;--border-light:#374766;
  --text-primary:#e8edf5;--text-secondary:#8b97b0;--text-muted:#5c6a82;
  --accent:#4f8cf7;--accent-hover:#3a7af0;--accent-glow:rgba(79,140,247,0.15);
  --green:#34d399;--green-hover:#2bc48e;--yellow:#fbbf24;--yellow-bg:rgba(251,191,36,0.12);
  --red:#f87171;--red-bg:rgba(248,113,113,0.15);
  --purple:#a78bfa;--purple-bg:rgba(167,139,250,0.12);
  --radius:8px;--radius-lg:12px;
  --font:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',sans-serif;
  --mono:ui-monospace,'Cascadia Code','SF Mono',Consolas,monospace;
  --shadow:0 2px 8px rgba(0,0,0,.3);--shadow-lg:0 8px 32px rgba(0,0,0,.5);
}
html,body{height:100%;overflow:hidden;font-family:var(--font);background:var(--bg-deep);color:var(--text-primary);font-size:14px;line-height:1.5}
[hidden]{display:none!important}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}
*{scrollbar-width:thin;scrollbar-color:var(--border) transparent}
.icon{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;display:inline-block;vertical-align:middle}
.icon-sm{width:14px;height:14px}
.icon-lg{width:26px;height:26px}
button{font:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* ---------- Auth ---------- */
.auth-screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(1100px 600px at 70% -10%,rgba(79,140,247,.12),transparent 60%),var(--bg-deep);padding:16px;z-index:9000}
.auth-card{width:100%;max-width:400px;background:var(--bg-base);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-lg)}
.auth-logo{width:48px;height:48px;border-radius:12px;background:var(--accent-glow);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.auth-card h1{font-size:20px;font-weight:700;margin-bottom:6px}
.auth-sub{font-size:12.5px;color:var(--text-secondary);margin-bottom:18px;line-height:1.6}
.auth-tabs{display:flex;gap:4px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:3px;margin-bottom:16px}
.auth-tab{flex:1;padding:7px;border:none;background:transparent;color:var(--text-secondary);border-radius:6px;cursor:pointer;font-size:12.5px;font-weight:500;transition:all .15s}
.auth-tab.active{background:var(--accent);color:#fff}
#authForm label{display:block;font-size:11px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px}
#authForm input{display:block;width:100%;margin-top:5px;padding:10px 12px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font:inherit;font-size:13px;outline:none;transition:border-color .15s}
#authForm input:focus{border-color:var(--accent)}
.auth-error{background:var(--red-bg);color:var(--red);border:1px solid rgba(248,113,113,.3);padding:8px 10px;border-radius:var(--radius);font-size:12px;margin-bottom:12px}
.auth-notice{background:var(--accent-glow);color:var(--accent);border:1px solid rgba(79,140,247,.3);padding:8px 10px;border-radius:var(--radius);font-size:12px;margin-bottom:12px}
.auth-submit{width:100%;padding:11px;background:var(--accent);border:none;border-radius:var(--radius);color:#fff;font-weight:600;font-size:13.5px;cursor:pointer;transition:background .15s}
.auth-submit:hover{background:var(--accent-hover)}
.auth-submit:disabled{opacity:.5;cursor:wait}

/* ---------- Layout ---------- */
.app{display:flex;height:100vh;width:100vw;position:relative}
.sidebar{width:260px;background:var(--bg-base);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;z-index:100;transition:margin-left .25s ease}
.sidebar.collapsed{margin-left:-260px}
.sb-header{padding:10px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:6px}
.sb-brand{font-size:12px;font-weight:600;color:var(--text-secondary);letter-spacing:.6px;text-transform:uppercase;padding:2px 4px;display:flex;align-items:center;gap:6px}
.sb-actions{display:flex;gap:4px}
.sb-actions button{padding:7px 8px;border:1px solid var(--border);background:var(--bg-surface);color:var(--text-primary);border-radius:var(--radius);cursor:pointer;font-size:12px;font-weight:500;display:flex;align-items:center;justify-content:center;gap:5px;transition:all .15s}
.sb-actions button:first-child{flex:1}
.sb-actions button:hover{background:var(--bg-hover);border-color:var(--border-light)}
.sb-actions .primary{background:var(--accent);border-color:var(--accent);color:#fff}
.sb-actions .primary:hover{background:var(--accent-hover)}
.sb-search{padding:0 2px}
.sb-search input{width:100%;padding:6px 8px 6px 28px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font:inherit;font-size:12px;outline:none;transition:border-color .15s}
.sb-search input:focus{border-color:var(--accent)}
.sb-search-wrap{position:relative}
.sb-search-wrap .icon{position:absolute;left:7px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}
.chat-list{flex:1;overflow-y:auto;padding:4px 6px}
.chat-item{padding:8px 10px;margin-bottom:2px;border-radius:var(--radius);cursor:pointer;transition:all .15s;position:relative;border:1px solid transparent}
.chat-item:hover{background:var(--bg-surface);border-color:var(--border)}
.chat-item.active{background:var(--accent-glow);border-color:var(--accent)}
.chat-item-title{font-size:12px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:28px}
.chat-item-meta{font-size:10px;color:var(--text-muted);margin-top:2px;display:flex;align-items:center;gap:6px}
.chat-item-del{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--red-bg);color:var(--red);border:none;padding:3px 5px;border-radius:4px;cursor:pointer;opacity:0;transition:opacity .15s;display:flex;align-items:center}
.chat-item:hover .chat-item-del{opacity:1}
.chat-item-del:hover{background:var(--red);color:#fff}
.thread-badge{background:var(--purple-bg);color:var(--purple);font-size:10px;padding:1px 5px;border-radius:10px;font-weight:500}
.model-chip{background:var(--bg-raised);color:var(--text-secondary);font-size:9.5px;padding:1px 5px;border-radius:8px;font-family:var(--mono);max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sb-footer{padding:8px 10px;border-top:1px solid var(--border);font-size:11px;color:var(--text-secondary);display:flex;align-items:center;gap:6px}
.sb-user{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sb-signout{background:transparent;border:1px solid var(--border);color:var(--text-secondary);border-radius:6px;padding:4px 6px;cursor:pointer;display:flex;transition:all .15s}
.sb-signout:hover{color:var(--red);border-color:var(--red)}

/* ---------- Main / toolbar ---------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.toolbar{padding:8px 12px;background:var(--bg-base);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.toolbar-btn{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-primary);padding:6px 8px;border-radius:var(--radius);cursor:pointer;font-size:12px;display:flex;align-items:center;gap:4px;transition:all .15s}
.toolbar-btn:hover{background:var(--bg-hover);border-color:var(--border-light)}
.layer-tag{background:var(--accent);color:#fff;padding:4px 10px;border-radius:12px;font-size:11px;font-weight:600;white-space:nowrap}
.model-sel{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-primary);padding:6px 10px;border-radius:var(--radius);font:inherit;font-size:12px;cursor:pointer;flex:1;max-width:300px;min-width:120px;outline:none;transition:border-color .15s}
.model-sel:focus{border-color:var(--accent)}
.toolbar-spacer{flex:1}
.sync-bar{padding:5px 14px;font-size:11px;background:var(--yellow-bg);color:var(--yellow);border-bottom:1px solid rgba(251,191,36,.25)}

/* ---------- Messages ---------- */
.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:10px 14px;border-radius:var(--radius-lg);line-height:1.65;position:relative;word-wrap:break-word}
.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px;white-space:pre-wrap}
.msg.assistant{align-self:flex-start;background:var(--bg-surface);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg-model{font-size:9.5px;font-family:var(--mono);color:var(--text-muted);margin-bottom:4px}
.msg.assistant .msg-actions{position:absolute;top:4px;right:4px;display:flex;gap:2px;opacity:0;transition:opacity .15s}
.msg.assistant:hover .msg-actions{opacity:1}
.msg-action-btn{background:var(--bg-raised);border:1px solid var(--border);color:var(--text-secondary);padding:3px;border-radius:4px;cursor:pointer;display:flex;align-items:center;transition:all .15s}
.msg-action-btn:hover{color:var(--text-primary);background:var(--bg-hover)}
.msg.error{align-self:flex-start;background:var(--red-bg);border:1px solid rgba(248,113,113,.3);color:var(--red);max-width:78%;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.msg-thread-count{display:inline-flex;align-items:center;gap:3px;background:var(--yellow-bg);color:var(--yellow);font-size:10px;font-weight:600;padding:2px 6px;border-radius:8px;margin-top:6px;cursor:pointer}
.msg-thread-count:hover{background:rgba(251,191,36,.2)}
.msg.assistant p{margin:0 0 8px}
.msg.assistant p:last-child{margin-bottom:0}
.msg.assistant strong{font-weight:600;color:#fff}
.msg.assistant em{font-style:italic;color:var(--text-secondary)}
.msg.assistant code{font-family:var(--mono);font-size:12px;background:var(--bg-deep);padding:1px 5px;border-radius:3px;color:var(--green)}
.msg.assistant pre{background:var(--bg-deep);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;overflow-x:auto;margin:8px 0;position:relative}
.msg.assistant pre code{padding:0;background:none;font-size:12px;color:var(--text-primary);line-height:1.5}
.msg.assistant ul,.msg.assistant ol{margin:6px 0;padding-left:20px}
.msg.assistant li{margin-bottom:3px}
.msg.assistant blockquote{border-left:3px solid var(--accent);padding-left:10px;margin:6px 0;color:var(--text-secondary)}
.msg.assistant h1,.msg.assistant h2,.msg.assistant h3{font-weight:600;margin:10px 0 5px;color:#fff}
.msg.assistant h1{font-size:16px}.msg.assistant h2{font-size:15px}.msg.assistant h3{font-size:14px}
.msg.assistant a{color:var(--accent)}
.copy-code-btn{position:absolute;top:6px;right:6px;background:var(--bg-raised);border:1px solid var(--border);color:var(--text-muted);padding:2px 6px;border-radius:4px;cursor:pointer;font-size:10px;font-family:var(--font);transition:all .15s}
.copy-code-btn:hover{color:var(--text-primary);background:var(--bg-hover)}
.thread-hl{background:var(--yellow-bg);cursor:pointer;border-bottom:2px solid var(--yellow);padding:1px 3px;border-radius:3px;transition:all .15s}
.thread-hl:hover{background:rgba(251,191,36,.25)}
.retry-btn{background:transparent;border:1px solid var(--red);color:var(--red);padding:3px 8px;border-radius:6px;cursor:pointer;font-size:11px;display:inline-flex;align-items:center;gap:4px}
.retry-btn:hover{background:var(--red);color:#fff}

.thread-btn{position:fixed;background:var(--green);color:#0a0e1a;border:none;padding:6px 12px;border-radius:var(--radius);cursor:pointer;font-size:12px;font-weight:700;z-index:10000;box-shadow:var(--shadow-lg);display:none;align-items:center;gap:5px;transition:transform .15s}
.thread-btn:hover{background:var(--green-hover);transform:translateY(-1px)}

/* ---------- Input ---------- */
.input-area{padding:10px 14px;background:var(--bg-base);border-top:1px solid var(--border)}
.input-wrap{display:flex;gap:8px;align-items:flex-end}
.input-box{flex:1;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;color:var(--text-primary);font:inherit;font-size:13px;resize:none;min-height:42px;max-height:140px;line-height:1.5;outline:none;transition:border-color .15s}
.input-box:focus{border-color:var(--accent)}
.send-btn{background:var(--accent);color:#fff;border:none;padding:10px 18px;border-radius:var(--radius);cursor:pointer;font-weight:600;font-size:13px;transition:all .15s;display:flex;align-items:center;gap:5px;white-space:nowrap}
.send-btn:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}
.send-btn:disabled{opacity:.4;cursor:not-allowed}
.stop-btn{background:var(--red-bg);color:var(--red);border:1px solid rgba(248,113,113,.4);padding:10px 16px;border-radius:var(--radius);cursor:pointer;font-weight:600;font-size:13px;display:flex;align-items:center;gap:5px}
.stop-btn:hover{background:var(--red);color:#fff}
.input-hint{margin-top:6px;font-size:11px;color:var(--yellow)}
.input-hint a{color:var(--accent);cursor:pointer;text-decoration:underline}

/* ---------- Empty / loading ---------- */
.empty{text-align:center;color:var(--text-muted);padding:60px 20px;font-size:13px}
.empty-icon{margin-bottom:10px;color:var(--border-light)}
.empty-note{padding:30px;text-align:center;color:var(--text-muted);font-size:12px}
.streaming-dot{display:inline-block;animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{opacity:.3}50%{opacity:1}}
.typing-indicator{display:flex;gap:4px;padding:4px 0}
.typing-indicator span{width:6px;height:6px;background:var(--text-muted);border-radius:50%;animation:bounce .6s infinite alternate}
.typing-indicator span:nth-child(2){animation-delay:.15s}
.typing-indicator span:nth-child(3){animation-delay:.3s}
@keyframes bounce{to{transform:translateY(-4px);opacity:.5}}

/* ---------- Overlays / panels ---------- */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:none;align-items:center;justify-content:center;z-index:5000;padding:12px;backdrop-filter:blur(3px)}
.overlay.open{display:flex}
.overlay-top{align-items:flex-start;padding-top:60px}
.panel{background:var(--bg-deep);border-radius:var(--radius-lg);width:92%;max-width:600px;max-height:84vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);border:1px solid var(--border);animation:modalIn .2s ease}
.panel-lg{max-width:760px;height:84vh}
@keyframes modalIn{from{opacity:0;transform:scale(.97) translateY(10px)}to{opacity:1;transform:none}}
.panel-head{padding:12px 16px;background:var(--bg-base);border-bottom:1px solid var(--border);border-radius:var(--radius-lg) var(--radius-lg) 0 0;display:flex;align-items:center;justify-content:space-between}
.panel-head h3{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px}
.panel-head-accent{background:var(--purple)}
.panel-head-accent h3{color:#fff}
.panel-body{flex:1;overflow-y:auto;padding:14px 16px}
.close-btn{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);padding:5px;border-radius:var(--radius);cursor:pointer;display:flex;transition:all .15s;margin-left:auto}
.close-btn:hover{background:var(--bg-hover);color:var(--text-primary)}

/* ---------- Thread modal ---------- */
.modal-box{background:var(--bg-deep);border-radius:var(--radius-lg);width:92%;max-width:960px;height:88vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);border:1px solid var(--border);animation:modalIn .2s ease}
.modal-head{padding:10px 14px;background:var(--bg-base);border-bottom:1px solid var(--border);border-radius:var(--radius-lg) var(--radius-lg) 0 0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.modal-head .model-sel{max-width:230px}
.thread-ctx{background:var(--yellow-bg);border-bottom:1px solid rgba(251,191,36,.3);padding:8px 14px;font-size:12px;color:var(--yellow);display:flex;align-items:center;gap:6px}
.thread-ctx-text{color:var(--text-secondary);font-style:italic;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- Tree ---------- */
.tree-node{padding:6px 8px;margin:2px 0;border-radius:var(--radius);cursor:pointer;transition:all .15s;font-size:12px;display:flex;align-items:center;gap:6px;border:1px solid transparent}
.tree-node:hover{background:var(--bg-surface);border-color:var(--border)}
.tree-node .layer-tag{font-size:9px;padding:2px 6px}
.tree-node-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tree-node-count{color:var(--text-muted);font-size:10px}
.tree-children{padding-left:16px;border-left:1px solid var(--border);margin-left:10px}

/* ---------- Search ---------- */
.search-input-wrap{padding:12px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.search-input-wrap .icon{color:var(--text-muted);flex-shrink:0}
.search-input{flex:1;background:transparent;border:none;color:var(--text-primary);font:inherit;font-size:14px;outline:none}
.search-input::placeholder{color:var(--text-muted)}
.search-results{flex:1;overflow-y:auto;padding:6px;max-height:60vh}
.search-result{padding:8px 12px;border-radius:var(--radius);cursor:pointer;transition:all .15s;margin:2px 0}
.search-result:hover{background:var(--bg-surface)}
.search-result-title{font-size:12px;font-weight:500;margin-bottom:2px}
.search-result-excerpt{font-size:11px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search-result-type{font-size:10px;color:var(--accent);font-weight:500}
.search-result mark{background:var(--yellow-bg);color:var(--yellow);border-radius:2px;padding:0 2px}

/* ---------- Settings ---------- */
.settings-tabs{display:flex;gap:2px;padding:8px 16px 0;background:var(--bg-base);border-bottom:1px solid var(--border)}
.settings-tab{padding:8px 14px;background:transparent;border:none;border-bottom:2px solid transparent;color:var(--text-secondary);cursor:pointer;font-size:12.5px;font-weight:500;transition:all .15s}
.settings-tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.settings-note{font-size:12px;color:var(--text-secondary);margin-bottom:14px;line-height:1.6}
.settings-h4{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin:16px 0 8px}
.key-form,.model-fetch-row{display:flex;gap:6px;margin-bottom:10px;flex-wrap:wrap}
.key-form input,.model-fetch-row input{flex:1;min-width:140px;padding:8px 10px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font:inherit;font-size:12px;outline:none}
.key-form input:focus,.model-fetch-row input:focus{border-color:var(--accent)}
.key-form .model-sel,.model-fetch-row .model-sel{flex:0 1 180px}
.primary-btn{background:var(--accent);border:none;color:#fff;padding:8px 12px;border-radius:var(--radius);cursor:pointer;font-size:12px;font-weight:600;display:flex;align-items:center;gap:5px;transition:background .15s}
.primary-btn:hover{background:var(--accent-hover)}
.primary-btn:disabled{opacity:.5;cursor:wait}
.ghost-btn{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-primary);padding:8px 12px;border-radius:var(--radius);cursor:pointer;font-size:12px;transition:all .15s}
.ghost-btn:hover{background:var(--bg-hover)}
.key-error{background:var(--red-bg);color:var(--red);border:1px solid rgba(248,113,113,.3);padding:8px 10px;border-radius:var(--radius);font-size:12px;margin-bottom:10px}
.key-list,.active-model-list,.catalog-list{display:flex;flex-direction:column;gap:4px}
.key-row,.am-row,.cat-row{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);font-size:12px}
.key-row .prov,.am-row .prov{background:var(--purple-bg);color:var(--purple);font-size:10px;font-weight:600;padding:2px 7px;border-radius:8px;text-transform:uppercase;letter-spacing:.4px;white-space:nowrap}
.key-row .lbl,.am-row .lbl,.cat-row .lbl{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.key-row .masked{font-family:var(--mono);color:var(--text-muted);font-size:11px}
.row-del{background:var(--red-bg);color:var(--red);border:none;padding:4px 6px;border-radius:5px;cursor:pointer;display:flex;transition:all .15s}
.row-del:hover{background:var(--red);color:#fff}
.cat-row{cursor:default}
.cat-row .mid{font-family:var(--mono);font-size:11px;color:var(--text-secondary);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cat-add{background:var(--green);color:#0a0e1a;border:none;padding:4px 10px;border-radius:5px;cursor:pointer;font-size:11px;font-weight:700}
.cat-add:disabled{background:var(--bg-raised);color:var(--text-muted);cursor:default}
.catalog-list{max-height:260px;overflow-y:auto}

/* ---------- Help ---------- */
.help-section{margin-bottom:16px}
.help-section:last-child{margin-bottom:0}
.help-section h4{font-size:13px;font-weight:600;color:var(--purple);margin-bottom:5px}
.help-section p{font-size:12px;color:var(--text-secondary);line-height:1.65}
.kbd{background:var(--bg-deep);border:1px solid var(--border);border-radius:3px;padding:1px 5px;font-family:var(--mono);font-size:11px;color:var(--yellow)}

@media(max-width:768px){
  .sidebar{position:fixed;left:0;top:0;height:100vh;box-shadow:2px 0 12px rgba(0,0,0,.4)}
  .modal-box{width:97%;height:92vh}
  .msg{max-width:92%}
  .model-sel{max-width:100%;min-width:80px}
  .toolbar{padding:6px 8px;gap:4px}
  .panel-lg{height:92vh}
}