:root{font-family:Manrope,system-ui,sans-serif;color:#242424;background:#fff;--panel:#f8f8f7;--line:#e9e9e7;--muted:#92928e;--bubble:#f3f3f1;--bg:#fff;--ink:#242424;--accent:#50694d}*{box-sizing:border-box}body{margin:0;display:flex;height:100dvh}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,textarea:focus-visible,.attach:focus-within{outline:2px solid #7d9876;outline-offset:3px}button{border:0;background:none}aside{width:260px;flex-shrink:0;background:var(--panel);padding:32px 18px 18px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.brand{font-size:30px;letter-spacing:-1.8px;font-weight:800;color:var(--ink);text-decoration:none;padding:0 15px}.brand span{color:#8da184;font-size:10px;margin-left:5px}.new-chat{margin:36px 0 28px;background:var(--bg);box-shadow:0 2px 8px #00000006;border:1px solid var(--line);border-radius:12px;padding:13px;text-align:left;font-size:13px;font-weight:600}.new-chat span{margin-right:14px;font-size:20px}.section-label{font-size:9px;letter-spacing:1.7px;color:var(--muted);margin:0 14px 12px}nav{overflow:auto;flex:1}nav button{display:block;text-align:left;width:100%;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:12px 14px;border-radius:8px;margin:3px 0}nav button.active,nav button:hover{background:var(--line)}.sidebar-footer{border-top:1px solid var(--line);padding:20px 9px 0;display:flex;align-items:center;gap:11px;font-size:12px;font-weight:700}.avatar{background:#e4e9df;color:#52654e;border-radius:12px;width:34px;height:34px;display:grid;place-items:center;font-weight:700}.sidebar-footer small{display:block;font-size:10px;font-weight:400;color:var(--muted);margin-top:4px}#theme{margin-left:auto;font-size:20px}main{min-width:0;flex:1;display:flex;flex-direction:column}header{height:83px;display:flex;align-items:center;gap:18px;padding:0 34px;font-size:14px;font-weight:600}.muted{color:var(--muted);padding-left:8px}.header-note{margin-left:auto;font-weight:400;color:var(--muted);font-size:11px}#menu{display:none}#scroll-area{overflow:auto;flex:1;scroll-behavior:smooth}#welcome{max-width:740px;margin:clamp(35px,13vh,145px) auto 40px;padding:0 24px;text-align:center}.spark{width:56px;height:56px;margin:0 auto 28px;border-radius:18px;background:#eef2eb;color:#6a8061;font-size:37px;display:grid;place-items:center}h1{font-size:36px;letter-spacing:-1.3px;font-weight:600;margin:0 0 15px}#welcome>p{color:var(--muted);font-size:14px;line-height:1.9}.suggestions{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:44px;text-align:left}.suggestions button{background:var(--panel);border:1px solid var(--line);border-radius:15px;text-align:left;padding:18px 16px;transition:transform .2s}.suggestions button:hover{transform:translateY(-3px)}.suggestions span{display:block;font-size:22px;color:#6a8061;margin-bottom:16px}.suggestions strong{font-size:12px;font-weight:600;display:block}.suggestions small{display:block;font-size:10px;color:var(--muted);line-height:1.7;margin-top:7px}#messages{max-width:790px;margin:20px auto;padding:0 28px}.message{margin:24px 0 34px;line-height:1.8;font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere}.message.user{background:var(--bubble);border-radius:20px;padding:14px 20px;width:fit-content;max-width:86%;margin-left:auto}.message.assistant::before{content:'✳  SciBend';display:block;font-size:12px;font-weight:700;color:#7a8c71;margin-bottom:10px}.message small{display:block;color:var(--muted);font-size:11px}.message.pending{color:var(--muted)}.message.error{color:#ae5353}.composer-wrap{width:min(100%,830px);margin:0 auto;padding:15px 34px 18px}#composer{background:var(--bg);border:1px solid #dededb;border-radius:23px;padding:15px 16px 10px;box-shadow:0 5px 24px #00000004}textarea{width:100%;resize:none;border:0;outline:none;background:none;color:var(--ink);font:inherit;font-size:14px;line-height:1.7;max-height:180px;padding:2px 4px}textarea::placeholder{color:#a4a4a0}.composer-tools{display:flex;align-items:center;gap:12px;margin-top:14px}.attach{font-size:24px;cursor:pointer;display:grid;place-items:center;width:30px;height:30px;position:relative}.attach input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}#upload-hint{font-size:10px;color:var(--muted)}#send{background:#262825;color:white;border-radius:50%;height:34px;width:34px;font-size:22px;margin-left:auto}#send:disabled{opacity:.35;cursor:wait}.footnote{text-align:center;font-size:9px;color:var(--muted);margin:13px 0 0}.file-chip{display:inline-flex;align-items:center;gap:9px;background:var(--bubble);border-radius:8px;font-size:11px;padding:7px 10px;margin:0 6px 9px 0;max-width:100%;overflow-wrap:anywhere}.file-chip button{font-size:15px}#notice{font-size:12px;color:#a44c45;padding:0 6px 10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}body.dark{--bg:#20211f;--panel:#191a18;--line:#33352f;--bubble:#30322e;--ink:#eeefe9;--muted:#9b9e94;background:var(--bg);color:var(--ink)}.dark .spark{background:#303b2c}.dark #composer{border-color:#494c44}.dark #send{background:#e0e7da;color:#262825}@media(max-width:850px){aside{width:220px}.suggestions{gap:8px}.suggestions button{padding:14px 10px}header{padding:0 22px}.header-note{display:none}h1{font-size:30px}}@media(max-width:620px){aside{position:fixed;z-index:5;inset:0 auto 0 0;transform:translateX(-100%);transition:transform .2s;box-shadow:10px 0 50px #0002}body.menu-open aside{transform:none}#menu{display:block}header{height:65px;font-size:13px}.composer-wrap{padding:10px 15px 15px}#welcome{margin-top:45px}.suggestions{grid-template-columns:1fr;margin:26px auto 0;max-width:310px}.suggestions button{padding:12px 15px}.suggestions span{float:left;margin:3px 15px 0 0}.suggestions small{margin-top:3px}#messages{padding:0 20px}.message{font-size:13px}#upload-hint{font-size:9px}}
#image-mode{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:18px;padding:6px 10px;font-size:11px;white-space:nowrap}#image-mode[aria-pressed=true]{background:#e8efdf;border-color:#b5c6a8;color:#40553a}.dark #image-mode[aria-pressed=true]{background:#35472e;color:#e0ecd5}.image-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:14px;margin-top:15px;white-space:normal}.image-gallery figure{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:16px;background:var(--panel)}.image-gallery img{display:block;width:100%;height:auto;max-height:650px;object-fit:contain}.image-gallery figcaption{padding:11px 14px;font-size:12px}.image-gallery figcaption a{color:var(--accent);text-decoration:none}.dark .image-gallery figcaption a{color:#a9c496}@media(max-width:620px){#upload-hint{display:none}.composer-tools{gap:8px}}
.file-chip img{width:44px;height:44px;object-fit:cover;border-radius:6px;flex-shrink:0}#image-options{display:flex;align-items:center;gap:10px;padding:1px 4px 10px;font-size:11px;color:var(--muted)}#image-intent{max-width:100%;border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--ink);padding:6px 8px;font:inherit;font-size:11px}.image-actions{display:flex;gap:8px;margin-top:10px}.image-actions button{font-size:11px;border:1px solid var(--line);border-radius:8px;padding:6px 10px;background:var(--bg)}#composer.drag-over{border-color:#7d9876;box-shadow:0 0 0 3px #7d987633}@media(max-width:620px){#image-options{align-items:flex-start;flex-direction:column;gap:5px}}
/* SciBend brand tokens */
:root{font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif;--panel:#fff;--ink:#101416;--muted:#667075;--accent:#03b8c5;--bubble:#f3fafb;color:var(--ink)}aside{border:0;box-shadow:4px 0 24px rgba(16,20,22,.08)}.brand{font-size:26px;letter-spacing:-1px}.brand span,.suggestions span{color:var(--accent)}.spark,.avatar{background:#fff;color:var(--accent);box-shadow:0 8px 28px rgba(16,20,22,.09)}.new-chat,.suggestions button,#composer,.image-gallery figure{border:0;box-shadow:0 8px 28px rgba(16,20,22,.09)}nav button.active,nav button:hover{background:var(--bg);box-shadow:0 4px 16px rgba(16,20,22,.08)}nav button.active{border-left:3px solid var(--accent)}.message.assistant::before{content:'✳  SciBend';color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,.attach:focus-within{outline:2px solid var(--accent);outline-offset:3px}#send{background:#101416}#image-mode[aria-pressed=true]{background:#e8f9fa;color:#08757d;border-color:var(--accent)}.sidebar-footer a{font-size:11px;color:var(--muted)}body.login-page{min-height:100dvh;height:auto;display:grid;place-items:center;padding:24px;background:#fff}.login-card{width:min(100%,420px);display:block;padding:36px;border-radius:22px;box-shadow:0 18px 48px rgba(16,20,22,.12)}.login-card .brand{padding:0}.login-card .section-label{margin:32px 0 12px}.login-card h1{font-size:30px}.login-card p{color:var(--muted);line-height:1.6}.login-card label{display:block;margin:18px 0 7px;font-size:14px}.login-card input{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;font:inherit}.login-submit{display:block;width:100%;text-align:center;text-decoration:none;margin:24px 0;padding:13px;border-radius:10px;background:#101416;color:#fff;font:inherit}.login-card>a:last-child{display:inline-block;margin-top:20px;color:var(--muted);font-size:14px}
.file-downloads{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;white-space:normal}.file-downloads a{display:block;padding:10px 14px;border-radius:10px;box-shadow:0 4px 16px rgba(16,20,22,.09);color:var(--accent);text-decoration:none;font-size:13px}.message pre{padding:16px;border-radius:12px;background:var(--bubble);overflow:auto;white-space:pre;font:13px/1.6 Consolas,monospace}.message a{color:var(--accent)}