:root{--bg: #0b1419;--bg-elev: #111b21;--sidebar: #0d1a20;--sidebar-hover: #15252e;--border: rgba(255, 255, 255, .08);--text: #e8eef2;--muted: #8aa0ad;--accent: #14b8a6;--accent-dim: #0d9488;--accent-ink: #042f2e;--user-bubble: linear-gradient(135deg, #0f766e, #14b8a6);--bot-bubble: #1a2830;--danger: #ef4444;--radius: 14px;--sidebar-w: 280px;--font: "DM Sans", system-ui, sans-serif;--display: "Fraunces", Georgia, serif;--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px);--safe-l: env(safe-area-inset-left, 0px);--safe-r: env(safe-area-inset-right, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;height:100dvh}body{font-family:var(--font);background:var(--bg);color:var(--text);overflow:hidden;-webkit-font-smoothing:antialiased}button,textarea{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none}.app{display:flex;height:100%;background:radial-gradient(ellipse 70% 50% at 20% -10%,rgba(20,184,166,.12),transparent 55%),var(--bg)}.backdrop{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:20}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:calc(12px + var(--safe-t)) 12px calc(12px + var(--safe-b));z-index:30;transition:margin .2s ease,transform .2s ease}.app.sidebar-collapsed .sidebar{margin-left:calc(-1 * var(--sidebar-w));pointer-events:none}.sidebar-head{display:flex;align-items:center;gap:10px;padding:8px 8px 16px}.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(145deg,var(--accent),var(--accent-dim));color:var(--accent-ink);font-family:var(--display);font-weight:600;font-size:1.15rem;display:grid;place-items:center}.brand-text{display:flex;flex-direction:column;min-width:0}.brand-text strong{font-family:var(--display);font-size:1.1rem;font-weight:600}.brand-text span{font-size:.72rem;color:var(--muted)}.sidebar-close{display:none!important}.btn-new{width:100%;padding:12px 14px;border-radius:12px;background:#14b8a626;color:var(--accent);font-weight:600;text-align:left;border:1px solid rgba(20,184,166,.25);transition:background .15s}.btn-new:hover{background:#14b8a640}.chat-list{flex:1;overflow-y:auto;margin-top:16px;display:flex;flex-direction:column;gap:4px}.chat-list-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:4px 10px 8px}.chat-item{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;border-radius:10px;text-align:left;color:var(--text);transition:background .12s}.chat-item.generating .chat-item-title{color:var(--accent)}.chat-item-spinner{width:12px;height:12px;border-radius:50%;border:2px solid rgba(20,184,166,.25);border-top-color:var(--accent);animation:chat-spin .7s linear infinite;flex-shrink:0}@keyframes chat-spin{to{transform:rotate(360deg)}}.chat-item:hover{background:var(--sidebar-hover)}.chat-item.on{background:var(--sidebar-hover);outline:1px solid var(--border)}.chat-item-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.9rem}.chat-item-del{opacity:0;font-size:1.1rem;color:var(--muted);padding:0 4px;line-height:1}.chat-item:hover .chat-item-del,.chat-item.on .chat-item-del{opacity:1}.chat-item-del:hover{color:var(--danger)}.main{flex:1;min-width:0;display:flex;flex-direction:column;position:relative}.main-top{display:flex;align-items:center;gap:12px;padding:calc(12px + var(--safe-t)) 20px 12px;border-bottom:1px solid var(--border);background:#0b1419d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.menu-btn{display:grid}.icon-btn{width:36px;height:36px;border-radius:10px;font-size:1.2rem;color:var(--muted);display:grid;place-items:center}.icon-btn:hover{background:var(--sidebar-hover);color:var(--text)}.main-title{flex:1;min-width:0}.main-title h1{font-family:var(--display);font-size:1.15rem;font-weight:600;line-height:1.2}.main-title p{font-size:.78rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status-pill{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;font-size:.75rem;color:var(--muted);background:var(--bg-elev);border:1px solid var(--border)}.status-pill .dot{width:7px;height:7px;border-radius:50%;background:var(--muted)}.status-pill.ok .dot{background:#22c55e}.status-pill.bad .dot{background:var(--danger)}.messages-shell{flex:1;min-height:0;position:relative;display:flex}.messages{flex:1;overflow-y:auto;padding:20px 28px 20px 16px;scrollbar-width:thin;scrollbar-color:rgba(20,184,166,.45) transparent}.messages::-webkit-scrollbar{width:8px}.messages::-webkit-scrollbar-track{background:transparent}.messages::-webkit-scrollbar-thumb{background:#14b8a659;border-radius:999px;border:2px solid transparent;background-clip:padding-box}.messages::-webkit-scrollbar-thumb:hover{background:#14b8a68c;background-clip:padding-box}.messages-inner{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.msg-rail{position:absolute;top:12px;right:4px;bottom:12px;width:18px;z-index:5;display:flex;align-items:stretch;pointer-events:none}.msg-rail-track{flex:1;display:flex;flex-direction:column;justify-content:space-between;align-items:center;padding:4px 0;pointer-events:auto}.msg-tick{width:12px;height:3px;border-radius:2px;border:none;padding:0;background:#8aa0ad73;cursor:pointer;transition:background .12s,transform .12s,width .12s;flex-shrink:0}.msg-tick.user{background:#14b8a673}.msg-tick.assistant{background:#94a3b880}.msg-tick:hover,.msg-tick.on{width:14px;transform:scaleY(1.4);background:var(--accent)}.bubble{max-width:92%;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.bubble.user{align-self:flex-end}.bubble.assistant{align-self:flex-start}.bubble-label{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:.68rem;color:var(--muted);margin-bottom:4px;padding:0 4px}.bubble.user .bubble-label{flex-direction:row-reverse}.bubble-time{font-size:.65rem;color:var(--muted);opacity:.85;white-space:nowrap;font-variant-numeric:tabular-nums}.bubble-body{padding:12px 14px;border-radius:var(--radius);line-height:1.55;font-size:.95rem;word-break:break-word}.bubble.user .bubble-body{background:var(--user-bubble);color:#fff;border-bottom-right-radius:4px}.bubble.assistant .bubble-body{background:var(--bot-bubble);border:1px solid var(--border);border-bottom-left-radius:4px}.md-body{display:flex;flex-direction:column;gap:.65rem}.md-p{margin:0;line-height:1.65;color:inherit}.md-h{margin:.35rem 0 .1rem;font-weight:700;line-height:1.35;color:#f1f5f9}.md-h1{font-size:1.2rem}.md-h2{font-size:1.08rem}.md-h3,.md-h4{font-size:1rem;color:#ccfbf1}.md-ul,.md-ol{margin:.15rem 0 .25rem;padding-left:1.25rem;display:flex;flex-direction:column;gap:.35rem}.md-ul li,.md-ol li{line-height:1.55;padding-left:.15rem}.md-ul{list-style:disc}.md-ol{list-style:decimal}.bubble-body code{font-family:ui-monospace,monospace;font-size:.88em;background:#00000040;padding:.1em .35em;border-radius:4px}.code-block{margin:4px 0 8px;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.1);background:#070d12;box-shadow:inset 0 1px #ffffff0a}.code-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;background:#ffffff0a;border-bottom:1px solid rgba(255,255,255,.08)}.code-toolbar .lang{font-size:.7rem;color:var(--muted);text-transform:lowercase;letter-spacing:.04em}.code-toolbar .copy-code{font-size:.72rem;padding:4px 10px;border-radius:8px;color:var(--muted);border:1px solid var(--border);background:transparent}.code-toolbar .copy-code:hover{color:var(--accent);border-color:#14b8a666}.code-toolbar .copy-code.copied{color:#22c55e}.code-block pre{margin:0;padding:14px 16px;overflow-x:auto;max-height:420px}.code-block pre code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82rem;line-height:1.55;white-space:pre;background:transparent;padding:0;color:#e2e8f0}.bubble-body .line{margin-bottom:.35em}.bubble-body .line:last-child{margin-bottom:0}.bubble-body .bullet{padding-left:1em;position:relative}.bubble-body .bullet:before{content:"•";position:absolute;left:0;color:var(--accent)}.caret{display:inline-block;width:2px;height:1em;margin-left:2px;background:var(--accent);vertical-align:text-bottom;animation:blink .8s step-end infinite}@keyframes blink{50%{opacity:0}}.banner.error{max-width:720px;margin:0 auto 8px;padding:10px 14px;border-radius:10px;background:#ef44441f;border:1px solid rgba(239,68,68,.35);color:#fca5a5;font-size:.85rem}.composer-wrap{padding:8px 16px calc(16px + var(--safe-b));border-top:1px solid var(--border);background:#0b1419eb}.composer{max-width:720px;margin:0 auto;display:flex;gap:10px;align-items:flex-end;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:8px 8px 8px 14px}.composer:focus-within{border-color:#14b8a673}.composer textarea{flex:1;resize:none;border:none;outline:none;background:transparent;min-height:24px;max-height:120px;line-height:1.45;font-size:16px;padding:6px 0}.composer button[type=submit]{flex-shrink:0;padding:10px 18px;border-radius:12px;background:var(--accent);color:var(--accent-ink);font-weight:600;transition:opacity .12s}.composer button[type=submit]:disabled{opacity:.45;cursor:not-allowed}.composer button[type=submit]:not(:disabled):hover{background:#2dd4bf}.btn-pause{flex-shrink:0;width:44px;height:44px;border-radius:12px;background:#ef4444;color:#fff;display:grid;place-items:center;transition:background .12s}.btn-pause:hover{background:#dc2626}.pause-icon{width:12px;height:12px;box-shadow:inset 3px 0 #fff,inset -3px 0 #fff;background:transparent;border-left:3px solid transparent;border-right:3px solid transparent;background-clip:content-box;position:relative}.pause-icon:before,.pause-icon:after{content:"";position:absolute;top:0;width:3.5px;height:12px;background:#fff;border-radius:1px}.pause-icon:before{left:1px}.pause-icon:after{right:1px}.footnote{max-width:720px;margin:8px auto 0;font-size:.7rem;color:var(--muted);text-align:center}.sidebar-user{margin-top:auto;padding-top:12px;border-top:1px solid var(--border)}.user-chip{display:flex;gap:10px;align-items:center;padding:8px;margin-bottom:8px}.user-chip-btn{width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:12px;color:inherit;cursor:pointer}.user-chip-btn:hover{border-color:var(--border);background:#ffffff08}.user-chip .dot{width:34px;height:34px;border-radius:10px;background:#14b8a640;color:var(--accent);display:grid;place-items:center;font-weight:700}.user-chip .who{display:flex;flex-direction:column;min-width:0;font-size:.78rem}.user-chip .who strong{font-size:.88rem}.user-chip .who span{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.token-meta{font-size:.7rem!important}.btn-logout{width:100%;padding:10px;border-radius:10px;color:var(--muted);border:1px solid var(--border)}.btn-logout:hover{color:var(--danger);border-color:#ef444459}.title-click{cursor:pointer}.title-click:hover{color:var(--accent)}.title-edit input{width:100%;max-width:280px;background:var(--bg-elev);border:1px solid var(--border);border-radius:8px;padding:4px 8px;color:var(--text);font-size:.78rem}.auth-gate{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(20,184,166,.22),transparent 55%),linear-gradient(165deg,#071018,#0c2a36,#0a1f2a)}.auth-card{width:100%;max-width:400px;background:var(--bg-elev);border:1px solid var(--border);border-radius:20px;padding:28px 24px;display:flex;flex-direction:column;gap:12px;align-items:stretch}.auth-card h1{font-family:var(--display);text-align:center;font-size:1.6rem}.auth-sub{text-align:center;color:var(--muted);font-size:.85rem;margin-top:-6px}.brand-mark.lg{width:48px;height:48px;font-size:1.4rem;margin:0 auto 4px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:8px 0 4px}.auth-tabs button{padding:8px;border-radius:10px;background:var(--bg);color:var(--muted);border:1px solid var(--border)}.auth-tabs button.on{background:#14b8a633;color:var(--accent);border-color:#14b8a659}.field{padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--bg);font-size:16px}.auth-submit{margin-top:4px;padding:12px;border-radius:12px;background:var(--accent);color:var(--accent-ink);font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px}.auth-submit.loading{opacity:.85}.btn-spinner{width:16px;height:16px;border:2px solid rgba(4,47,46,.25);border-top-color:var(--accent-ink);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.demo-users{margin:8px 0 4px;padding:12px;border-radius:12px;background:#14b8a614;border:1px solid rgba(20,184,166,.2)}.demo-label{font-size:.72rem;color:var(--muted);margin-bottom:8px}.demo-row{display:flex;flex-wrap:wrap;gap:6px}.demo-chip{padding:8px 12px;border-radius:999px;background:var(--bg);border:1px solid var(--border);font-size:.82rem;color:var(--text)}.demo-chip:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.demo-hint{font-size:.68rem;color:var(--muted);margin-top:8px}.muted{color:var(--muted)}@media (max-width: 860px){.sidebar{position:fixed;inset:0 auto 0 0;margin-left:0;transform:translate(-105%);transition:transform .2s ease;box-shadow:8px 0 32px #00000059;pointer-events:auto}.app.sidebar-collapsed .sidebar{margin-left:0;transform:translate(-105%);pointer-events:none}.app.sidebar-open .sidebar{transform:translate(0);pointer-events:auto}.app.sidebar-open .backdrop{display:block}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;background:#0000008c;display:grid;place-items:center;padding:20px}.modal-card{width:min(420px,100%);background:var(--panel, #111827);border:1px solid var(--border);border-radius:16px;padding:18px 18px 16px;box-shadow:0 24px 64px #00000073}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.modal-head h2{margin:0;font-size:1.15rem}.modal-close{width:32px;height:32px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--muted);font-size:1.2rem;line-height:1}.modal-form{display:flex;flex-direction:column;gap:12px}.modal-form label{display:flex;flex-direction:column;gap:6px;font-size:.82rem;color:var(--muted)}.modal-form input{border-radius:10px;border:1px solid var(--border);background:#ffffff08;color:inherit;padding:10px 12px;font-size:.92rem}.modal-error{margin:0;color:var(--danger, #ef4444);font-size:.85rem}.modal-ok{margin:0;color:var(--accent);font-size:.85rem}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:4px}.modal-actions .btn-ghost{padding:10px 14px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--muted)}.modal-actions .btn-primary{padding:10px 14px;border-radius:10px;border:none;background:var(--accent);color:#042f2e;font-weight:600}.modal-actions .btn-primary:disabled{opacity:.6}