:root{--bg: #0d1117;--bg-surface: #161b22;--bg-hover: #21262d;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--accent-hover: #79c0ff;--success: #3fb950;--warning: #d29922;--danger: #f85149;--user-bg: #1c2128;--assistant-bg: #161b22;--code-bg: #0d1117;--tool-running: #d29922;--tool-complete: #3fb950;--tool-error: #f85149;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.4)}[data-theme=light]{--bg: #f6f8fa;--bg-surface: #ffffff;--bg-hover: #f3f4f6;--border: #d0d7de;--text: #1f2328;--text-muted: #636c76;--accent: #0969da;--accent-hover: #0550ae;--success: #1a7f37;--warning: #9a6700;--danger: #d1242f;--user-bg: #ddf4ff;--assistant-bg: #ffffff;--code-bg: #f6f8fa}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);height:100dvh;overflow:hidden}#root{height:100%}.app{display:grid;grid-template-columns:240px 1fr;grid-template-rows:48px 1fr;height:100%}.header{grid-column:1 / -1;display:flex;align-items:center;gap:12px;padding:0 16px;background:var(--bg-surface);border-bottom:1px solid var(--border)}.header__title{font-weight:600;font-size:15px;flex:1}.header__subtitle{font-size:12px;color:var(--text-muted)}.header__actions{display:flex;align-items:center;gap:8px}.btn-logout{background:none;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-muted);cursor:pointer;font-size:14px;padding:4px 8px;line-height:1}.btn-logout:hover{border-color:var(--danger);color:var(--danger)}.app-loading{height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.app-loading__spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.login-screen{height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:12px;padding:40px;width:320px;box-shadow:0 8px 32px #00000040;display:flex;flex-direction:column;align-items:center;gap:8px}.login-logo{font-size:40px}.login-title{font-size:20px;font-weight:700;margin:0}.login-subtitle{font-size:12px;color:var(--text-muted);margin:0 0 12px}.login-form{width:100%;display:flex;flex-direction:column;gap:10px}.login-input{width:100%;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:14px;box-sizing:border-box}.login-input:focus{outline:none;border-color:var(--accent)}.login-error{color:var(--danger);font-size:13px;margin:0;text-align:center}.login-btn{width:100%;padding:10px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer}.login-btn:hover:not(:disabled){background:var(--accent-hover)}.login-btn:disabled{opacity:.5;cursor:not-allowed}.sidebar{background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar__header{display:flex;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border);font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.sidebar__title{flex:1}.sidebar__list{flex:1;overflow-y:auto;list-style:none}.sidebar__empty{padding:16px 12px;font-size:13px;color:var(--text-muted);text-align:center}.sidebar__item{position:relative;padding:10px 12px;cursor:pointer;border-bottom:1px solid var(--border);transition:background .1s}.sidebar__item:hover{background:var(--bg-hover)}.sidebar__item--active{background:var(--bg-hover);border-left:2px solid var(--accent)}.sidebar__item-summary{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-right:20px}.sidebar__item-time{font-size:11px;color:var(--text-muted);margin-top:2px}.sidebar__item-delete{position:absolute;top:8px;right:8px;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:16px;opacity:0;transition:opacity .15s}.sidebar__item:hover .sidebar__item-delete{opacity:1}.sidebar__item-delete:hover{color:var(--danger)}.main{display:flex;flex-direction:column;overflow:hidden}.chat-window{flex:1;overflow-y:auto;padding:24px 16px;display:flex;flex-direction:column;gap:16px}.chat-window--empty{justify-content:center;align-items:center}.chat-window__welcome{text-align:center;max-width:480px}.chat-window__welcome-icon{font-size:48px;margin-bottom:12px}.chat-window__welcome h2{font-size:20px;margin-bottom:8px}.chat-window__welcome p{font-size:14px;color:var(--text-muted);margin-bottom:20px}.chat-window__suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.suggestion{background:var(--bg-surface);border:1px solid var(--border);border-radius:20px;padding:6px 14px;font-size:13px;color:var(--text);cursor:pointer;transition:border-color .15s,background .15s}.suggestion:hover{border-color:var(--accent);background:var(--bg-hover)}.message{display:flex;gap:12px;max-width:860px;width:100%;margin:0 auto}.message--user{flex-direction:row-reverse}.message__avatar{width:32px;height:32px;border-radius:50%;background:var(--bg-surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.message__body{flex:1;min-width:0}.message--user .message__body{align-items:flex-end;display:flex;flex-direction:column}.message__content{background:var(--assistant-bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;font-size:14px;line-height:1.6;word-wrap:break-word;box-shadow:var(--shadow)}.message--user .message__content{background:var(--user-bg)}.message__text{margin-bottom:8px}.message__text:last-child{margin-bottom:0}.message__text:empty{display:none}.message__content p{margin:0 0 8px}.message__content p:last-child{margin-bottom:0}.message__content h1,.message__content h2,.message__content h3,.message__content h4,.message__content h5,.message__content h6{margin:12px 0 6px;font-weight:600;line-height:1.3}.message__content h1{font-size:1.3em}.message__content h2{font-size:1.15em}.message__content h3{font-size:1.05em}.message__content ul,.message__content ol{margin:6px 0 8px;padding-left:22px}.message__content li{margin:2px 0}.message__content li>p{margin:0}.message__content blockquote{border-left:3px solid var(--accent);margin:8px 0;padding:4px 12px;color:var(--text-muted);font-style:italic}.message__content hr{border:none;border-top:1px solid var(--border);margin:12px 0}.message__content a{color:var(--accent);text-decoration:underline}.message__content a:hover{color:var(--accent-hover)}.message__content strong{font-weight:600}.message__content em{font-style:italic}.message__content table{border-collapse:collapse;width:100%;margin:10px 0;font-size:13px}.message__content th,.message__content td{border:1px solid var(--border);padding:6px 10px;text-align:left}.message__content th{background:var(--code-bg);font-weight:600}.message__content tr:nth-child(2n) td{background:color-mix(in srgb,var(--code-bg) 50%,transparent)}.message__content input[type=checkbox]{margin-right:6px}.message__inline-code{background:var(--code-bg);border:1px solid var(--border);border-radius:3px;padding:1px 5px;font-family:SF Mono,Menlo,Consolas,monospace;font-size:.88em}.message__code{background:var(--code-bg);border:1px solid var(--border);border-radius:6px;padding:12px;overflow-x:auto;font-family:SF Mono,Menlo,Consolas,monospace;font-size:13px;margin:8px 0;white-space:pre}.message__thinking{color:var(--text-muted);font-style:italic}.message__cursor{animation:blink 1s step-end infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.message__time{font-size:11px;color:var(--text-muted);margin-top:4px;padding:0 4px}.message--user .message__time{text-align:right}.message__tools{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.tool-call{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;font-size:12px;border:1px solid}.tool-call--running{border-color:var(--tool-running);color:var(--tool-running);background:color-mix(in srgb,var(--tool-running) 10%,transparent)}.tool-call--complete{border-color:var(--tool-complete);color:var(--tool-complete);background:color-mix(in srgb,var(--tool-complete) 10%,transparent)}.tool-call--error{border-color:var(--tool-error);color:var(--tool-error);background:color-mix(in srgb,var(--tool-error) 10%,transparent)}.tool-call__spinner{width:10px;height:10px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.tool-call-wrap{position:relative;display:inline-flex}.tool-call--hoverable{cursor:pointer}.tool-call--hoverable:hover{filter:brightness(1.15)}.tool-popover{position:absolute;bottom:calc(100% + 8px);left:0;z-index:100;min-width:260px;max-width:420px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px #00000059;padding:10px 12px;font-size:12px}.tool-popover__title{font-weight:600;font-family:SF Mono,Menlo,Consolas,monospace;margin-bottom:8px;color:var(--accent)}.tool-popover__section{margin-top:6px}.tool-popover__label{font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:3px}.tool-popover__code{background:var(--code-bg);border:1px solid var(--border);border-radius:4px;padding:6px 8px;margin:0;font-family:SF Mono,Menlo,Consolas,monospace;font-size:11px;white-space:pre-wrap;word-break:break-all;max-height:200px;overflow-y:auto}.message-input{padding:12px 16px;border-top:1px solid var(--border);background:var(--bg-surface);display:flex;gap:8px;align-items:flex-end}.message-input__textarea{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:inherit;font-size:14px;line-height:1.5;padding:8px 12px;resize:none;outline:none;transition:border-color .15s;max-height:200px;overflow-y:auto}.message-input__textarea:focus{border-color:var(--accent)}.message-input__actions{display:flex;gap:6px}.btn{border:1px solid var(--border);border-radius:var(--radius);padding:7px 14px;font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,border-color .15s;background:var(--bg-surface);color:var(--text)}.btn--send{background:var(--accent);border-color:var(--accent);color:#fff}.btn--send:hover:not(:disabled){background:var(--accent-hover)}.btn--send:disabled{opacity:.5;cursor:not-allowed}.btn--cancel{border-color:var(--danger);color:var(--danger)}.btn--cancel:hover{background:color-mix(in srgb,var(--danger) 10%,transparent)}.btn--new{background:none;border:none;color:var(--accent);font-size:18px;padding:0 4px;cursor:pointer}.btn--new:hover{color:var(--accent-hover)}.theme-toggle{background:none;border:none;font-size:18px;cursor:pointer;padding:2px;border-radius:4px;transition:background .15s}.theme-toggle:hover{background:var(--bg-hover)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}