:root{--bg-app: #faf9f5;--bg-panel: #ffffff;--bg-sidebar: #f4f1ea;--bg-input: #ffffff;--bg-subtle: #f0ede4;--line: #e5e1d6;--line-soft: #ece8dd;--accent: #c96442;--accent-hover: #b8552f;--accent-soft: rgba(201, 100, 66, .1);--accent-soft-strong: rgba(201, 100, 66, .16);--cyan: #3d8b8b;--cyan-soft: rgba(61, 139, 139, .1);--red: #c0392b;--red-soft: rgba(192, 57, 43, .08);--text-hi: #2b2820;--text-mid: #6b6656;--text-low: #9c9686;--serif: "Source Serif 4", Georgia, serif;--sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--radius-sm: 8px;--radius: 14px;--radius-lg: 20px;--shadow-sm: 0 1px 2px rgba(43, 40, 32, .06);--shadow-panel: 0 4px 16px rgba(43, 40, 32, .06), 0 1px 3px rgba(43, 40, 32, .05);--shadow-float: 0 12px 32px rgba(43, 40, 32, .12), 0 2px 8px rgba(43, 40, 32, .06)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg-app);color:var(--text-hi);font-family:var(--sans);font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}input{font-family:inherit}::selection{background:var(--accent-soft-strong);color:var(--text-hi)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--line);border-radius:8px;border:2px solid transparent;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:var(--text-low);background-clip:padding-box}@keyframes rise-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes soft-pop{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}@keyframes caret-blink{0%,49%{opacity:1}50%,to{opacity:0}}@keyframes pulse-dot{0%,to{opacity:.4;transform:scale(.8)}50%{opacity:1;transform:scale(1.1)}}.gate{min-height:100%;display:grid;place-items:center;padding:24px;background:radial-gradient(ellipse 1000px 600px at 50% 0%,var(--accent-soft),transparent 65%),var(--bg-app)}.gate__card{width:100%;max-width:400px;background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-float);padding:40px 36px 32px;animation:soft-pop .42s cubic-bezier(.16,1,.3,1) both}.gate__mark{width:40px;height:40px;border-radius:11px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-weight:600;font-size:18px;margin-bottom:18px}.gate__eyebrow{display:flex;align-items:center;gap:7px;color:var(--text-low);font-size:11px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}.gate__eyebrow .dot{width:6px;height:6px;border-radius:50%;background:#6fae6f}.gate__title{font-family:var(--serif);font-weight:600;font-size:28px;letter-spacing:-.01em;margin:0 0 6px;color:var(--text-hi)}.gate__subtitle{color:var(--text-mid);font-size:13.5px;margin:0 0 26px}.gate__field{display:flex;flex-direction:column;gap:7px;margin-bottom:20px}.gate__label{font-size:12px;font-weight:500;color:var(--text-mid)}.gate__input{background:var(--bg-input);border:1.5px solid var(--line);border-radius:var(--radius-sm);color:var(--text-hi);font-size:15px;padding:13px 15px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.gate__input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.gate__submit{width:100%;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-weight:600;font-size:14.5px;padding:13px 16px;box-shadow:var(--shadow-sm);transition:background .14s ease,transform 80ms ease,box-shadow .14s ease}.gate__submit:hover{background:var(--accent-hover);box-shadow:0 4px 12px #c9644240}.gate__submit:active{transform:scale(.98)}.gate__error{margin:16px 0 0;color:var(--red);background:var(--red-soft);border-radius:var(--radius-sm);padding:10px 13px;font-size:13px;display:flex;align-items:center;gap:7px;animation:rise-in .18s ease-out both}.app{display:flex;height:100vh;background:var(--bg-app)}.sidebar{width:272px;flex-shrink:0;background:var(--bg-sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column}.sidebar__brand{padding:20px 18px 16px}.sidebar__brand-title{font-family:var(--serif);font-weight:600;font-size:19px;color:var(--text-hi);display:flex;align-items:center;gap:9px;letter-spacing:-.01em}.sidebar__brand-title .glyph{width:26px;height:26px;border-radius:8px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:13px;flex-shrink:0}.sidebar__brand-sub{font-size:11.5px;color:var(--text-low);margin-top:4px;padding-left:35px}.sidebar__new{margin:4px 14px 14px;background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--text-hi);font-size:13px;font-weight:500;padding:10px 13px;display:flex;align-items:center;gap:8px;box-shadow:var(--shadow-sm);transition:border-color .13s ease,box-shadow .13s ease,transform 80ms ease}.sidebar__new:hover{border-color:var(--accent);box-shadow:0 2px 8px #c9644224}.sidebar__new:active{transform:scale(.99)}.sidebar__new .plus{color:var(--accent);font-size:16px;line-height:1}.sidebar__list{list-style:none;margin:0;padding:0 10px;overflow-y:auto;flex:1}.sidebar__item{width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);color:var(--text-mid);font-size:13px;padding:10px 12px;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .12s ease,color .12s ease}.sidebar__item:hover{background:var(--bg-subtle);color:var(--text-hi)}.sidebar__item[aria-current=true]{background:var(--accent-soft);color:var(--accent);font-weight:500}.sidebar__error{margin:0 18px 12px;color:var(--red);font-size:11.5px}.sidebar__empty{color:var(--text-low);font-size:12px;padding:10px 12px}.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg-app)}.empty-state{flex:1;display:grid;place-items:center}.empty-state__inner{text-align:center;animation:rise-in .32s ease-out both}.empty-state__glyph{width:52px;height:52px;border-radius:15px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:24px;margin:0 auto 18px}.empty-state__title{font-family:var(--serif);font-weight:600;font-size:24px;color:var(--text-hi);margin:0 0 6px}.empty-state__sub{font-size:13px;color:var(--text-low)}.chat{flex:1;display:flex;flex-direction:column;min-height:0}.chat__header{display:flex;align-items:center;gap:12px;padding:14px 24px;border-bottom:1px solid var(--line);background:var(--bg-app)}.chat__model{background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--text-hi);font-size:13px;font-weight:500;padding:9px 12px;outline:none;box-shadow:var(--shadow-sm);transition:border-color .13s ease}.chat__model:focus{border-color:var(--accent)}.chat__model-tag{font-size:11.5px;color:var(--text-low)}.chat__messages{flex:1;overflow-y:auto;padding:28px 24px;display:flex;flex-direction:column;gap:18px;max-width:760px;margin:0 auto;width:100%}.msg{max-width:74ch;animation:rise-in .28s cubic-bezier(.16,1,.3,1) both}.msg--user{align-self:flex-end}.msg--assistant,.msg--tool{align-self:flex-start}.msg__role{font-size:11px;font-weight:600;letter-spacing:.03em;margin-bottom:6px;display:flex;align-items:center;gap:6px;color:var(--text-low)}.msg--user .msg__role{justify-content:flex-end}.msg__bubble{border-radius:var(--radius);padding:13px 16px;font-size:14.5px;line-height:1.6;white-space:pre-wrap;word-break:break-word}.msg--user .msg__bubble{background:var(--accent);color:#fff;border-bottom-right-radius:4px;box-shadow:var(--shadow-sm)}.msg--assistant .msg__bubble{background:var(--bg-panel);border:1px solid var(--line);color:var(--text-hi);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.msg--tool .msg__bubble{background:var(--cyan-soft);border:1px solid rgba(61,139,139,.22);color:var(--text-mid);font-size:12.5px;border-radius:var(--radius-sm)}.msg__image{max-width:240px;border-radius:var(--radius-sm);border:1px solid var(--line);display:block;margin-top:8px}.msg__caret{display:inline-block;width:8px;height:15px;background:var(--accent);border-radius:1px;margin-left:2px;vertical-align:text-bottom;animation:caret-blink .9s steps(1) infinite}.tool-status{align-self:flex-start;display:flex;align-items:center;gap:9px;color:var(--cyan);font-size:12.5px;font-weight:500;padding:9px 14px;background:var(--cyan-soft);border:1px solid rgba(61,139,139,.22);border-radius:var(--radius);animation:rise-in .2s ease-out both}.tool-status .pulse{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:pulse-dot 1s ease-in-out infinite}.chat__error{color:var(--red);font-size:12.5px;border:1px solid rgba(192,57,43,.22);background:var(--red-soft);border-radius:var(--radius-sm);padding:10px 14px;max-width:760px;margin:0 auto 12px;width:calc(100% - 48px)}.chat__attachments{display:flex;gap:8px;padding:12px 24px 0;flex-wrap:wrap;max-width:760px;margin:0 auto;width:100%}.chat__attachment{position:relative}.chat__attachment img{width:58px;height:58px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--line);display:block}.chat__attachment button{position:absolute;top:-6px;right:-6px;width:19px;height:19px;border-radius:50%;background:var(--red);color:#fff;border:2px solid var(--bg-app);font-size:10px;line-height:1;display:grid;place-items:center;padding:0}.chat__composer{padding:16px 24px 22px;border-top:1px solid var(--line);background:var(--bg-app)}.chat__composer-inner{display:flex;align-items:center;gap:8px;max-width:760px;margin:0 auto;background:var(--bg-panel);border:1.5px solid var(--line);border-radius:var(--radius-lg);padding:6px 6px 6px 8px;box-shadow:var(--shadow-panel);transition:border-color .15s ease,box-shadow .15s ease}.chat__composer-inner:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.chat__attach-btn{position:relative;width:34px;height:34px;flex-shrink:0;border-radius:50%;border:none;background:transparent;color:var(--text-low);display:grid;place-items:center;font-size:17px;transition:background .12s ease,color .12s ease}.chat__attach-btn:hover:not(:disabled){background:var(--accent-soft);color:var(--accent)}.chat__attach-btn:disabled{opacity:.3;cursor:not-allowed}.chat__attach-btn input[type=file]{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.chat__attach-btn input[type=file]:disabled{cursor:not-allowed}.chat__input{flex:1;background:transparent;border:none;color:var(--text-hi);font-size:14.5px;padding:9px 6px;outline:none}.chat__input::placeholder{color:var(--text-low)}.chat__input:disabled{opacity:.5}.chat__send{flex-shrink:0;background:var(--accent);color:#fff;border:none;border-radius:50%;width:34px;height:34px;display:grid;place-items:center;font-size:15px;transition:background .12s ease,transform 80ms ease,opacity .12s ease}.chat__send:hover:not(:disabled){background:var(--accent-hover)}.chat__send:active:not(:disabled){transform:scale(.94)}.chat__send:disabled{opacity:.35;cursor:not-allowed}