:root{--bg: #0f1115;--surface: #1a1d26;--surface-2: #242836;--border: #2e3340;--text: #e8eaed;--text-dim: #9aa0ab;--accent: #6366f1;--accent-hover: #4f46e5;--danger: #ef4444;--radius: 16px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.5;overflow:hidden;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}input,textarea{font-family:inherit;font-size:16px}.touch-target{min-height:44px;min-width:44px}.app{display:flex;flex-direction:column;height:100%;padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}.topbar{display:flex;align-items:center;gap:12px;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border)}.topbar .brand{font-weight:700;font-size:18px;letter-spacing:.5px}.topbar .tabs{display:flex;gap:4px;margin-left:12px;background:var(--surface-2);border-radius:12px;padding:4px}.topbar .tabs button{padding:8px 18px;border-radius:9px;color:var(--text-dim);font-weight:600;transition:all .15s}.topbar .tabs button.active{background:var(--accent);color:#fff}.topbar .spacer{flex:1}.topbar .user{display:flex;align-items:center;gap:10px;color:var(--text-dim);font-size:14px}.topbar .user button{color:var(--text-dim);font-size:14px;padding:6px 12px;border-radius:8px;border:1px solid var(--border)}.content{flex:1;overflow:hidden;display:flex}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:12px;font-weight:600;background:var(--accent);color:#fff;transition:background .15s,transform .1s}.btn:active{transform:scale(.97)}.btn:hover{background:var(--accent-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.ghost{background:var(--surface-2);color:var(--text)}.auth-screen{display:flex;align-items:center;justify-content:center;height:100%;width:100%}.auth-card{width:380px;max-width:90%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:36px 32px}.auth-card h1{font-size:24px;margin-bottom:6px}.auth-card p{color:var(--text-dim);margin-bottom:24px;font-size:14px}.auth-card .field{margin-bottom:16px}.auth-card label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px}.auth-card input{width:100%;padding:14px 16px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);outline:none}.auth-card input:focus{border-color:var(--accent)}.auth-card .btn{width:100%;margin-top:8px}.auth-card .switch{text-align:center;margin-top:18px;font-size:14px;color:var(--text-dim)}.auth-card .switch button{color:var(--accent);font-weight:600}.error-text{color:var(--danger);font-size:14px;margin-bottom:12px}.chat-view{display:flex;width:100%;height:100%}.chat-sidebar{width:280px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column}.chat-sidebar .new-btn{margin:16px}.conv-list{flex:1;overflow-y:auto;padding:0 12px;-webkit-overflow-scrolling:touch}.conv-item{display:flex;align-items:center;gap:8px;padding:14px;border-radius:12px;margin-bottom:4px;color:var(--text-dim);font-size:15px}.conv-item.active{background:var(--surface-2);color:var(--text)}.conv-item .title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-item .del{opacity:0;color:var(--text-dim);font-size:18px}.conv-item.active .del,.conv-item:hover .del{opacity:1}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px;-webkit-overflow-scrolling:touch}.msg{max-width:80%;padding:14px 18px;border-radius:18px;white-space:pre-wrap;word-break:break-word}.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:6px}.msg.assistant{align-self:flex-start;background:var(--surface-2);border-bottom-left-radius:6px}.composer{display:flex;gap:12px;padding:16px 24px;border-top:1px solid var(--border);background:var(--surface)}.composer textarea{flex:1;resize:none;max-height:140px;padding:14px 16px;border-radius:14px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);outline:none}.composer textarea:focus{border-color:var(--accent)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-dim);gap:8px}.empty-state .big{font-size:22px;color:var(--text)}.image-view{display:flex;flex-direction:column;width:100%;height:100%}.image-compose{padding:20px 24px;border-bottom:1px solid var(--border);background:var(--surface);display:flex;gap:12px;align-items:flex-end}.image-compose textarea{flex:1;resize:none;height:64px;padding:14px 16px;border-radius:14px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);outline:none}.image-compose textarea:focus{border-color:var(--accent)}.image-grid{flex:1;overflow-y:auto;padding:24px;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;align-content:start;-webkit-overflow-scrolling:touch}.image-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.image-card img{width:100%;aspect-ratio:1;object-fit:cover;display:block;background:var(--surface-2)}.image-card .meta{padding:12px 14px}.image-card .meta .prompt{font-size:13px;color:var(--text-dim);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.image-card .meta .tag{display:inline-block;margin-top:8px;font-size:11px;color:var(--accent);background:var(--surface-2);padding:3px 8px;border-radius:6px}.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.generating-card{display:flex;flex-direction:column;align-items:center;justify-content:center;aspect-ratio:1;background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);color:var(--text-dim);gap:10px;padding:12px;text-align:center}.generating-card.failed{border-color:var(--danger);color:var(--danger)}.generating-card.failed .fail-reason{font-size:12px;color:var(--text-dim);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.enhance-toggle{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-dim);font-weight:600;font-size:14px;cursor:pointer;-webkit-user-select:none;user-select:none}.enhance-toggle.on{background:#8b5cf6;border-color:#8b5cf6;color:#fff}.enhance-toggle input{accent-color:#8b5cf6}@media(max-width:820px){.chat-sidebar{width:220px}}.badge{font-size:11px;background:var(--accent);color:#fff;padding:2px 8px;border-radius:6px;font-weight:600}.chat-toolbar{display:flex;align-items:center;gap:12px;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--surface)}.mode-toggle{padding:8px 14px;border-radius:10px;border:1px solid var(--border);color:var(--text-dim);font-weight:600;font-size:14px}.mode-toggle.on{background:var(--accent);color:#fff;border-color:var(--accent)}.model-selector{position:relative}.model-trigger{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);font-weight:600;font-size:14px}.model-trigger .dot{width:8px;height:8px;border-radius:50%;background:#22c55e}.model-trigger .caret{color:var(--text-dim);font-size:12px}.model-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:240px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:8px;z-index:50;box-shadow:0 12px 32px #0006;max-height:60vh;overflow-y:auto}.model-group{margin-bottom:6px}.model-group-label{font-size:12px;color:var(--text-dim);padding:6px 10px 4px}.model-option{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 12px;border-radius:8px;color:var(--text);font-size:14px;text-align:left}.model-option.active,.model-option:hover{background:var(--surface-2)}.model-option .check{color:var(--accent)}.msg-content{white-space:pre-wrap;word-break:break-word}.msg-model{font-size:11px;color:var(--text-dim);margin-top:6px;opacity:.7}.msg-actions{display:flex;gap:10px;margin-top:8px;opacity:0;transition:opacity .15s}.msg:hover .msg-actions{opacity:1}.msg-actions button{font-size:12px;color:var(--text-dim)}.msg-actions button:hover{color:var(--text)}.msg.user .msg-actions button{color:#ffffffb3}.inline-gen-btn{display:inline-block;margin-top:10px;padding:8px 14px;border-radius:10px;background:var(--accent);color:#fff;font-size:13px;font-weight:600}.inline-gen-btn.selection{background:#8b5cf6}.image-msg{align-self:flex-start;max-width:60%;background:var(--surface-2);padding:10px;border-radius:16px}.image-msg img{width:100%;border-radius:12px;display:block}.image-msg-prompt{font-size:12px;color:var(--text-dim);margin-top:8px}.generating-inline{display:flex;align-items:center;justify-content:center;gap:10px;height:180px;color:var(--text-dim)}.image-mode-tabs{display:flex;gap:4px;background:var(--surface-2);border-radius:12px;padding:4px;margin-bottom:12px;width:fit-content}.image-mode-tabs button{padding:8px 20px;border-radius:9px;color:var(--text-dim);font-weight:600}.image-mode-tabs button.active{background:var(--accent);color:#fff}.img-settings-wrap{position:relative}.img-settings-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40}.img-settings-pop{position:absolute;top:calc(100% + 6px);left:0;z-index:50;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px;box-shadow:0 12px 32px #0006;min-width:260px}.img-settings-title{font-size:12px;color:var(--text-dim);margin-bottom:10px}.img-settings{display:flex;gap:8px;flex-wrap:wrap}.img-settings.compact .size-select{padding:8px 10px}.img-settings-pop.wide{min-width:340px}.conv-system-input{width:100%;resize:vertical;min-height:110px;padding:12px 14px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);outline:none;line-height:1.5}.conv-system-input:focus{border-color:var(--accent)}.conv-settings-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:12px}.sidebar-toggle{font-size:18px;padding:8px 12px}.chat-sidebar{transition:width .2s ease,opacity .2s ease;overflow:hidden}.chat-view.sidebar-collapsed .chat-sidebar{width:0;min-width:0;border-right:none;opacity:0;pointer-events:none}.ref-images{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}.ref-thumb{position:relative;width:72px;height:72px;border-radius:10px;overflow:hidden;border:1px solid var(--border)}.ref-thumb img{width:100%;height:100%;object-fit:cover}.ref-del{position:absolute;top:2px;right:2px;width:20px;height:20px;border-radius:50%;background:#0009;color:#fff;font-size:14px;line-height:1}.ref-add{width:72px;height:72px;border-radius:10px;border:1px dashed var(--border);color:var(--text-dim);font-size:12px;display:flex;align-items:center;justify-content:center}.image-compose{flex-direction:column;align-items:stretch}.image-params{display:flex;gap:12px;align-items:center}.size-select{padding:12px 14px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);color:var(--text);outline:none}.image-card .tags{display:flex;gap:6px;align-items:center;margin-top:8px;flex-wrap:wrap}.image-card .tag.chat{color:#8b5cf6}.image-card .tag.del{margin-left:auto;color:var(--danger);cursor:pointer}.image-preview-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:100;padding:24px}.image-preview{max-width:90vw;max-height:90vh;display:flex;flex-direction:column;gap:12px}.image-preview img{max-width:90vw;max-height:75vh;object-fit:contain;border-radius:12px}.image-preview-info{background:var(--surface);border-radius:12px;padding:16px}.image-preview-info .prompt{color:var(--text-dim);font-size:14px;margin-bottom:12px}.image-preview-info .actions{display:flex;gap:12px}.admin-view{width:100%;height:100%;overflow-y:auto;padding:28px 32px}.admin-view h2{margin-bottom:20px}.admin-view h3{font-size:15px;margin-bottom:12px}.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:28px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.stat-card .num{font-size:32px;font-weight:700}.stat-card .lbl{color:var(--text-dim);font-size:14px;margin-top:4px}.admin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.admin-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.admin-section.full{grid-column:1 / -1}.admin-section table{width:100%;border-collapse:collapse;font-size:14px}.admin-section th,.admin-section td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}.admin-section th{color:var(--text-dim);font-weight:600}.admin-section .dim{color:var(--text-dim);font-size:13px}.provider-row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}@media(max-width:1024px){.image-msg{max-width:80%}.msg-actions{opacity:1}}@media(hover:none){.msg-actions,.conv-item .del{opacity:1}}