:root{--bg:#fff;--bg-sidebar:#f7f7f8;--bg-hover:#ececed;--bg-active:#e3e3e5;--bg-input:#fff;--bg-user-bubble:#f0f0f2;--border:#e4e4e7;--border-strong:#d4d4d8;--text:#1f1f23;--text-secondary:#6b6b73;--text-tertiary:#9a9aa3;--accent:#1a73e8;--accent-hover:#1765cc;--danger:#d93025;--radius:12px;--radius-sm:8px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace}@media(prefers-color-scheme:dark){:root{--bg:#1e1e20;--bg-sidebar:#171719;--bg-hover:#2a2a2d;--bg-active:#323236;--bg-input:#2a2a2d;--bg-user-bubble:#2d2d31;--border:#303033;--border-strong:#3d3d42;--text:#ececee;--text-secondary:#a0a0a8;--text-tertiary:#6e6e76;--accent:#8ab4f8;--accent-hover:#a6c6fa;--danger:#f28b82}}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;font-family:var(--font);font-size:14px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}body{display:flex;overflow:hidden;background:var(--bg-sidebar)}#__nuxt{display:flex;width:100%}.sidebar{width:260px;flex-shrink:0;background:var(--bg-sidebar);display:flex;flex-direction:column;height:100vh;height:100dvh}.sidebar-header{padding:14px 12px 10px}.brand{display:flex;align-items:center;gap:8px;padding:4px 8px 12px;font-weight:600;font-size:15px;letter-spacing:-.01em}.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}.new-chat-btn{width:100%;display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text);border-radius:var(--radius-sm);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:background .12s ease,border-color .12s ease}.new-chat-btn:hover{background:var(--bg-hover)}.new-chat-btn svg{width:16px;height:16px}.tools{flex-shrink:0;padding:6px 8px 20px}.tool-item{width:100%;display:flex;align-items:center;gap:10px;padding:9px 10px;border:none;background:transparent;color:var(--text-secondary);border-radius:var(--radius-sm);font-family:inherit;font-size:13.5px;font-weight:500;cursor:pointer;transition:background .1s ease}.tool-item:hover{background:var(--bg-hover)}.tool-item.active{background:var(--bg-active);color:var(--text)}.tool-item svg{width:16px;height:16px;flex-shrink:0}.history{flex:1;overflow-y:auto;padding:6px 8px 12px}.history-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary);padding:10px 8px 6px}.thread{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);position:relative;transition:background .1s ease}.thread:hover{background:var(--bg-hover)}.thread.active{background:var(--bg-active);color:var(--text)}.thread-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13.5px;padding-right:22px}.thread-delete{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:24px;height:24px;display:none;align-items:center;justify-content:center;border:none;background:transparent;color:var(--text-tertiary);border-radius:6px;cursor:pointer}.thread:hover .thread-delete{display:flex}.thread-delete:hover{background:var(--border-strong);color:var(--danger)}.thread-delete svg{width:15px;height:15px}.history-empty{padding:16px 10px;color:var(--text-tertiary);font-size:13px;line-height:1.5}.main{flex:1;display:flex;flex-direction:column;height:calc(100vh - 16px);height:calc(100dvh - 16px);min-width:0;margin:8px 8px 8px 0;background:var(--bg);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:0 1px 3px #0000000d}.topbar{height:52px;flex-shrink:0;display:flex;padding:0 20px;gap:10px}.menu-btn,.topbar{align-items:center}.menu-btn{display:none;width:34px;height:34px;margin-left:-6px;border:none;background:transparent;color:var(--text);border-radius:8px;cursor:pointer;justify-content:center}.menu-btn:hover{background:var(--bg-hover)}.menu-btn svg{width:20px;height:20px}.overlay{display:none;position:fixed;inset:0;background:#0006;z-index:40;opacity:0;transition:opacity .2s ease}.topbar-title{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.status-pill{margin-left:auto;font-size:11.5px;color:var(--text-secondary);display:flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--border);border-radius:999px;cursor:pointer;transition:background .12s ease,border-color .12s ease}.status-pill:hover{background:var(--bg-hover);border-color:var(--border-strong)}.status-pill .dot{width:7px;height:7px;border-radius:50%;background:var(--text-tertiary)}.status-pill.ready .dot{background:#1e8e3e}.status-pill.error .dot{background:var(--danger)}.messages{flex:1;overflow-y:auto;padding:28px 0 12px}.messages-inner{max-width:720px;margin:0 auto;padding:0 24px}.msg{display:flex;gap:14px;margin-bottom:26px;animation:fade .18s ease}@keyframes fade{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.avatar{width:28px;height:28px;flex-shrink:0;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;margin-top:1px}.msg.user .avatar{background:var(--bg-user-bubble);color:var(--text-secondary)}.msg.assistant .avatar{background:var(--accent);color:#fff}@media(prefers-color-scheme:dark){.msg.assistant .avatar{color:#1e1e20}}.bubble{flex:1;min-width:0;padding-top:3px;line-height:1.65;font-size:14.5px;word-wrap:break-word}.bubble p{margin:0 0 10px}.bubble p:last-child{margin-bottom:0}.bubble ol,.bubble ul{margin:0 0 10px;padding-left:22px}.bubble li{margin-bottom:3px}.bubble code{font-family:var(--mono);font-size:.88em;padding:1.5px 5px;border-radius:5px}.bubble code,.bubble pre{background:var(--bg-hover)}.bubble pre{border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;overflow-x:auto;margin:0 0 12px}.bubble pre code{background:none;padding:0;font-size:13px}.bubble strong{font-weight:600}.bubble h1,.bubble h2,.bubble h3{font-size:1.05em;margin:14px 0 8px;font-weight:600}.cursor-blink:after{content:"";display:inline-block;width:7px;height:15px;background:var(--text-secondary);margin-left:2px;border-radius:1px;vertical-align:text-bottom;animation:blink 1s steps(2) infinite}@keyframes blink{50%{opacity:0}}.main.welcome .messages{flex:1 1 0;overflow:visible;padding:0;display:flex;flex-direction:column;justify-content:flex-end}.main.welcome .empty-state{height:auto;padding:12px 24px 16px}.main.welcome .composer-wrap{flex:1 1 0;padding-top:0}.empty-state{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;gap:8px}.empty-state .logo{width:56px;height:56px;border-radius:14px;display:block;margin-bottom:8px}.empty-state h1{font-size:22px;font-weight:600;letter-spacing:-.02em}.empty-state p{color:var(--text-secondary);font-size:14px;max-width:380px;line-height:1.55}.composer-wrap{flex-shrink:0;padding:8px 0 18px}.composer{max-width:720px;margin:0 auto;padding:0 24px}.input-box{display:flex;align-items:flex-end;gap:8px;border:1px solid var(--border-strong);background:var(--bg-input);border-radius:var(--radius);padding:8px 8px 8px 16px;transition:border-color .12s ease,box-shadow .12s ease}.input-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}textarea{flex:1;border:none;outline:none;resize:none;background:transparent;color:var(--text);font-family:inherit;font-size:14.5px;line-height:1.5;max-height:200px;padding:6px 0}textarea::-moz-placeholder{color:var(--text-tertiary)}textarea::placeholder{color:var(--text-tertiary)}.send-btn{flex-shrink:0;width:34px;height:34px;border:none;border-radius:9px;background:var(--accent);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s ease,opacity .12s ease}@media(prefers-color-scheme:dark){.send-btn{color:#1e1e20}}.send-btn:hover{background:var(--accent-hover)}.send-btn:disabled{opacity:.4;cursor:default}.send-btn svg{width:17px;height:17px}.composer-hint{text-align:center;color:var(--text-tertiary);font-size:11.5px;margin-top:8px}.banner{max-width:720px;margin:0 auto 10px;padding:0 24px}.banner-inner{background:color-mix(in srgb,var(--danger) 10%,transparent);border:1px solid color-mix(in srgb,var(--danger) 35%,transparent);color:var(--danger);border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;line-height:1.5}.banner-inner b{font-weight:600}.translate-body{flex:1;display:flex;flex-direction:column;justify-content:center;min-height:0;max-width:920px;width:100%;margin:0 auto;padding:8px 24px 18px}.lang-bar{display:flex;align-items:center;gap:10px;padding:6px 0 14px}.lang-select{flex:1;min-width:0;padding:9px 12px;border:1px solid var(--border-strong);background:var(--bg-input);color:var(--text);border-radius:var(--radius-sm);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:border-color .12s ease,box-shadow .12s ease}.lang-select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}.swap-btn{flex-shrink:0;width:36px;height:36px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s ease,color .12s ease}.swap-btn:hover:not(:disabled){background:var(--bg-hover);color:var(--text)}.swap-btn:disabled{opacity:.4;cursor:default}.swap-btn svg{width:16px;height:16px}.translate-panes{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:stretch}.pane{position:relative;display:flex;border:1px solid var(--border-strong);background:var(--bg-input);border-radius:var(--radius);overflow:hidden}.pane:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}.translate-input{flex:1;border:none;outline:none;resize:none;overflow-y:auto;background:transparent;color:var(--text);font-family:inherit;font-size:15px;line-height:1.6;padding:16px;max-height:360px}.translate-input::-moz-placeholder{color:var(--text-tertiary)}.translate-input::placeholder{color:var(--text-tertiary)}.output-pane{background:var(--bg-user-bubble)}.translate-output{flex:1;overflow-y:auto;max-height:360px;padding:16px;font-size:15px;line-height:1.6;white-space:pre-wrap;word-wrap:break-word}.translate-output.placeholder{color:var(--text-tertiary)}.output-error{color:var(--danger)}.stream-cursor:after{content:"";display:inline-block;width:7px;height:15px;background:var(--text-secondary);margin-left:2px;border-radius:1px;vertical-align:text-bottom;animation:blink 1s steps(2) infinite}.copy-btn{position:absolute;top:10px;right:10px;width:30px;height:30px;border:1px solid var(--border);background:var(--bg);color:var(--text-secondary);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s ease,color .12s ease}.copy-btn:hover{background:var(--bg-hover);color:var(--text)}.copy-btn svg{width:15px;height:15px}.copy-btn.copied{color:#1e8e3e;border-color:color-mix(in srgb,#1e8e3e 45%,var(--border))}@media(prefers-color-scheme:dark){.copy-btn.copied{color:#81c995}}.translate-foot{display:flex;align-items:center;justify-content:center;gap:8px;padding-top:14px}.translate-btn{padding:11px 22px;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-family:inherit;font-size:14.5px;font-weight:600;cursor:pointer;transition:background .12s ease,opacity .12s ease}@media(prefers-color-scheme:dark){.translate-btn{color:#1e1e20}}.translate-btn:hover:not(:disabled){background:var(--accent-hover)}.translate-btn:disabled{opacity:.4;cursor:default}.translate-hint{display:inline-flex;align-items:center;gap:7px;text-align:center;color:var(--text-tertiary);font-size:12px}.translate-hint.active{color:var(--text-secondary)}.translate-spinner{width:12px;height:12px;border:2px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}.translate-dots{display:inline-flex;align-items:center;gap:5px}.translate-dots span{width:7px;height:7px;border-radius:50%;background:var(--text-tertiary);animation:dot-pulse 1.2s ease-in-out infinite}.translate-dots span:nth-child(2){animation-delay:.18s}.translate-dots span:nth-child(3){animation-delay:.36s}@keyframes dot-pulse{0%,60%,to{opacity:.3;transform:scale(.85)}30%{opacity:1;transform:scale(1)}}.tools{max-height:46vh;overflow-y:auto}.translate-body.wide{max-width:980px;justify-content:flex-start;overflow-y:auto}.tool-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:6px 0 14px}.tool-controls .translate-btn{margin-left:auto}.tool-lead{font-size:13px;color:var(--text-secondary)}.seg{display:inline-flex;gap:4px;padding:3px;background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--radius-sm)}.seg-btn{border:none;background:transparent;color:var(--text-secondary);font-family:inherit;font-size:13px;font-weight:500;padding:6px 12px;border-radius:6px;cursor:pointer;transition:background .12s ease,color .12s ease}.seg-btn.active,.seg-btn:hover{color:var(--text)}.seg-btn.active{background:var(--bg);box-shadow:0 1px 2px #00000014}.field{padding-bottom:12px}.field-label{display:block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary);padding:0 2px 6px}.result-area{padding-top:16px}.result-loading{display:flex;justify-content:center;padding:28px 0}.result-empty{text-align:center;color:var(--text-tertiary);font-size:13.5px;padding:28px 0}.tool-error{color:var(--danger);background:color-mix(in srgb,var(--danger) 10%,transparent);border:1px solid color-mix(in srgb,var(--danger) 35%,transparent);border-radius:var(--radius-sm);padding:12px 14px;font-size:13.5px;line-height:1.5}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}.flashcard{display:flex;flex-direction:column;justify-content:center;gap:10px;min-height:120px;text-align:left;padding:16px;border:1px solid var(--border-strong);background:var(--bg-input);border-radius:var(--radius);cursor:pointer;font-family:inherit;color:var(--text);transition:border-color .12s ease,background .12s ease,transform .08s ease}.flashcard:hover{border-color:var(--accent)}.flashcard:active{transform:scale(.99)}.flashcard.flipped{background:var(--bg-user-bubble)}.flashcard-side{font-size:14.5px;line-height:1.5}.flashcard-tag{font-size:11px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.04em}.quiz-list{display:flex;flex-direction:column;gap:18px}.quiz-q{font-size:14.5px;font-weight:600;margin-bottom:10px;line-height:1.45}.quiz-options{display:flex;flex-direction:column;gap:8px}.quiz-option{text-align:left;padding:11px 14px;border:1px solid var(--border-strong);background:var(--bg-input);color:var(--text);border-radius:var(--radius-sm);font-family:inherit;font-size:14px;cursor:pointer;transition:border-color .12s ease,background .12s ease,opacity .12s ease}.quiz-option:hover:not(:disabled){border-color:var(--accent)}.quiz-option:disabled{cursor:default}.quiz-option.correct{border-color:#1e8e3e;background:color-mix(in srgb,#1e8e3e 14%,var(--bg-input));color:var(--text)}.quiz-option.wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 12%,var(--bg-input))}.quiz-option.dim{opacity:.5}.idea-list{display:flex;flex-direction:column;gap:8px;list-style:none}.idea-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border:1px solid var(--border-strong);background:var(--bg-input);border-radius:var(--radius-sm);cursor:pointer;transition:border-color .12s ease,background .12s ease}.idea-item:hover{border-color:var(--accent)}.idea-text{font-size:14.5px;line-height:1.45}.idea-copy{flex-shrink:0;font-size:12px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.04em}.idea-copy.copied{color:#1e8e3e}@media(prefers-color-scheme:dark){.idea-copy.copied{color:#81c995}.quiz-option.correct{color:#ececee}}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:6px;border:3px solid transparent;background-clip:content-box}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary);background-clip:content-box}.startup{position:fixed;inset:0;z-index:200;background:var(--bg-sidebar);display:flex;align-items:center;justify-content:center;padding:20px}.startup.hidden{display:none}.startup-card{display:none;width:100%;max-width:440px;background:var(--bg);border:1px solid var(--border);border-radius:16px;padding:28px 26px 24px;box-shadow:0 8px 30px #0000001f}.startup.problems .startup-card{display:block}.startup-logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14px;color:var(--text-secondary);margin-bottom:16px}.startup-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}.startup-card h2{font-size:19px;font-weight:600;letter-spacing:-.01em}.startup-sub{font-size:13.5px;color:var(--text-secondary);margin:6px 0 20px;line-height:1.5}.check-list{list-style:none;display:flex;flex-direction:column;gap:2px}.check-row{display:flex;align-items:flex-start;gap:11px;padding:9px 4px}.check-ico{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-top:1px}.check-ico svg{width:13px;height:13px}.check-ico.pass{background:#e6f4ea;color:#1e8e3e}.check-ico.fail{background:#fce8e6;color:#d93025}.check-ico.warn{background:#fef7e0;color:#b06000}@media(prefers-color-scheme:dark){.check-ico.pass{background:#1e8e3e38;color:#81c995}.check-ico.fail{background:#d9302538;color:#f28b82}.check-ico.warn{background:#b0600042;color:#fdd663}}.check-ico.pending{background:transparent}.spin{width:14px;height:14px;border:2px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.check-body{display:flex;flex-direction:column;gap:1px;min-width:0}.check-label{font-size:14px;font-weight:500}.check-detail{font-size:12.5px;color:var(--text-secondary);line-height:1.45}.startup-foot{margin-top:18px}.startup-btn{width:100%;padding:12px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-family:inherit;font-size:14.5px;font-weight:600;cursor:pointer;transition:background .12s ease}@media(prefers-color-scheme:dark){.startup-btn{color:#1e1e20}}.startup-btn:hover{background:var(--accent-hover)}.startup-note{font-size:13px;line-height:1.55;color:var(--text-secondary);background:var(--bg-hover);border-radius:10px;padding:12px 14px;margin-bottom:12px}.startup-note b{color:var(--text);font-weight:600}.startup-note code{font-family:var(--mono);font-size:.9em;background:var(--bg);border:1px solid var(--border);padding:1px 5px;border-radius:5px}.startup-link{display:block;margin:0 auto;border:none;background:transparent;color:var(--text-tertiary);font-family:inherit;font-size:13px;cursor:pointer;padding:6px;text-decoration:underline}.startup-link:hover{color:var(--text-secondary)}.modal-overlay{display:none;position:fixed;inset:0;z-index:100;background:#0000006b;align-items:center;justify-content:center;padding:20px;animation:fade .16s ease}.modal-overlay.open{display:flex}.modal{position:relative;background:var(--bg);border:1px solid var(--border);border-radius:16px;max-width:460px;width:100%;max-height:86vh;overflow-y:auto;padding:28px 28px 24px;box-shadow:0 12px 40px #00000038;animation:pop .18s ease}@keyframes pop{0%{opacity:0;transform:translateY(8px) scale(.985)}to{opacity:1;transform:none}}.modal-close{position:absolute;top:14px;right:14px;width:32px;height:32px;border:none;background:transparent;color:var(--text-tertiary);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center}.modal-close:hover{background:var(--bg-hover);color:var(--text)}.modal-close svg{width:18px;height:18px}.modal-logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14px;color:var(--text-secondary);margin-bottom:10px}.modal-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}.modal h2{font-size:19px;font-weight:600;letter-spacing:-.01em;line-height:1.3;margin-bottom:18px}.modal h3{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary);margin:18px 0 7px}.modal p{font-size:14px;line-height:1.6;color:var(--text-secondary);margin-bottom:10px}.modal p:last-child{margin-bottom:0}.modal code{font-family:var(--mono);font-size:.85em;background:var(--bg-hover);padding:1.5px 5px;border-radius:5px;color:var(--text)}.modal a{color:var(--accent);text-decoration:none}.modal a:hover{text-decoration:underline}@media(max-width:720px){.menu-btn{display:flex}.sidebar{position:fixed;top:0;left:0;bottom:0;z-index:50;width:82%;max-width:300px;transform:translate(-100%);transition:transform .24s ease;box-shadow:2px 0 16px #0000002e}body.sidebar-open .sidebar{transform:translate(0)}body.sidebar-open .overlay{display:block;opacity:1}.thread-delete{display:flex}.banner,.composer,.messages-inner{padding-left:16px;padding-right:16px}.main{margin:8px;height:calc(100dvh - 16px)}.topbar{padding:0 14px}.status-pill{padding:7px;gap:0}.status-pill .status-text{display:none}.empty-state h1{font-size:20px}.bubble{font-size:15px}.thread{padding:11px 10px}.send-btn{width:38px;height:38px}.translate-body{padding:8px 14px 16px}.translate-panes{grid-template-columns:1fr}}
