:root{--bg: #0a0e17;--bg-elevated: #111827;--bg-hover: #1a2234;--border: rgba(255, 255, 255, .08);--text: #e5e7eb;--text-muted: #9ca3af;--accent: #6366f1;--accent-soft: rgba(99, 102, 241, .15);--danger: #f87171;--font: "Inter", system-ui, sans-serif;--sidebar-w: 288px;--topbar-h: 52px}*{box-sizing:border-box}html{height:100%;height:-webkit-fill-available}html.menu-open{overflow:hidden}html,body,#root{margin:0;height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);overscroll-behavior:none;-webkit-text-size-adjust:100%}button,input,select,textarea{font:inherit;-webkit-tap-highlight-color:transparent}.app-loading{display:grid;place-items:center;height:100dvh;color:var(--text-muted)}.login-screen{min-height:100dvh;display:grid;place-items:center;padding:24px;padding-bottom:max(24px,env(safe-area-inset-bottom))}.login-card{width:100%;max-width:380px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:16px;padding:28px}.login-brand{font-size:1.5rem;font-weight:600;letter-spacing:-.02em}.login-sub{margin:4px 0 24px;color:var(--text-muted);font-size:.875rem}.login-form label{display:block;margin-bottom:14px;font-size:.8rem;color:var(--text-muted)}.login-form input{display:block;width:100%;margin-top:6px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text)}.btn-primary{width:100%;margin-top:8px;padding:11px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-weight:500;cursor:pointer}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.login-switch{width:100%;margin-top:16px;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.85rem}.login-error{color:var(--danger);font-size:.85rem;margin:8px 0}.login-info{color:#86efac;font-size:.85rem;margin:8px 0}.app-root{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.chat-pane{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;width:100%}.side-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:900;background:#0000008c;opacity:0;pointer-events:none;transition:opacity .22s ease}.side-scrim--visible{opacity:1;pointer-events:auto}.side-nav{position:fixed;z-index:910;top:0;left:0;bottom:0;width:min(var(--sidebar-w),88vw);display:flex;flex-direction:column;background:var(--bg-elevated);border-right:1px solid var(--border);transform:translate(-102%);transition:transform .24s ease;pointer-events:none}.side-nav--open{transform:translate(0);pointer-events:auto}.side-nav-head{flex-shrink:0;padding:max(12px,env(safe-area-inset-top)) 14px 14px;border-bottom:1px solid var(--border)}.side-nav-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.side-nav-brand{font-weight:600;font-size:1rem}.side-nav-close{width:36px;height:36px;border:none;border-radius:8px;background:var(--bg-hover);color:var(--text);font-size:1.4rem;line-height:1;cursor:pointer}.side-nav-foot{flex-shrink:0;padding:12px 14px max(14px,env(safe-area-inset-bottom));border-top:1px solid var(--border)}.btn-new{width:100%;padding:10px;border-radius:10px;border:1px dashed var(--border);background:transparent;color:var(--text);cursor:pointer}.btn-new:active{background:var(--bg-hover)}.session-list{flex:1;min-height:0;overflow-y:auto;padding:8px;-webkit-overflow-scrolling:touch}.session-empty{padding:12px;font-size:.85rem;color:var(--text-muted)}.session-item{display:flex;align-items:center;gap:4px;border-radius:8px;margin-bottom:4px}.session-item--active{background:var(--accent-soft)}.session-title{flex:1;text-align:left;padding:10px;border:none;background:transparent;color:var(--text);cursor:pointer;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.session-delete{border:none;background:transparent;color:var(--text-muted);cursor:pointer;padding:4px 10px;font-size:1.1rem}.btn-ghost{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.85rem}.btn-logout{width:100%;text-align:left;padding:10px 4px}.chat-topbar{flex-shrink:0;display:flex;align-items:center;gap:8px;min-height:var(--topbar-h);padding:env(safe-area-inset-top) 10px 0;border-bottom:1px solid var(--border);background:var(--bg-elevated)}.chat-topbar-title{flex:1;min-width:0}.chat-topbar-sub{display:block;font-size:.95rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.icon-btn{flex-shrink:0;width:40px;height:40px;border:none;border-radius:10px;background:transparent;color:var(--text);cursor:pointer;display:grid;place-items:center}.icon-btn:active{background:var(--bg-hover)}.icon-btn--menu{display:flex;flex-direction:column;justify-content:center;gap:4px;padding:10px}.icon-btn--menu span{display:block;width:18px;height:2px;background:currentColor;border-radius:1px}.icon-btn--accent{background:var(--accent-soft);color:#c7d2fe;font-size:1.5rem;font-weight:300;line-height:1}.chat-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:14px 12px 8px}.chat-welcome{max-width:420px;margin:10vh auto 0;text-align:center;padding:0 12px}.chat-welcome h1{font-size:1.4rem;margin:0 0 8px}.chat-welcome p{color:var(--text-muted);line-height:1.5;font-size:.9rem}.msg{display:flex;margin-bottom:12px}.msg--user{justify-content:flex-end}.msg--assistant{justify-content:flex-start}.msg-bubble{max-width:min(720px,94%);padding:11px 13px;border-radius:14px;line-height:1.55;font-size:.95rem}.msg-text{white-space:pre-wrap;word-break:break-word}.msg--user .msg-bubble{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.msg--assistant .msg-bubble{background:var(--bg-elevated);border:1px solid var(--border);border-bottom-left-radius:4px;color:var(--text)}.msg-attachments{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}.msg-image{max-width:100%;max-height:240px;border-radius:8px;object-fit:contain}.msg-file{padding:8px 10px;border-radius:8px;background:#0003;font-size:.82rem}.msg--user .msg-file{background:#ffffff1f}.msg-file-name{font-weight:500;display:block;margin-bottom:4px}.msg-file-preview{margin:0;white-space:pre-wrap;word-break:break-word;font-family:JetBrains Mono,ui-monospace,monospace;font-size:.75rem;opacity:.9;max-height:120px;overflow:hidden}.msg-bubble--stream{border-color:#6366f159;white-space:pre-wrap;word-break:break-word}.msg-bubble--typing{display:flex;gap:5px;padding:14px 18px}.msg-bubble--typing span{width:7px;height:7px;border-radius:50%;background:var(--text-muted);animation:pulse 1.2s infinite ease-in-out}.msg-bubble--typing span:nth-child(2){animation-delay:.15s}.msg-bubble--typing span:nth-child(3){animation-delay:.3s}@keyframes pulse{0%,80%,to{opacity:.3;transform:scale(.85)}40%{opacity:1;transform:scale(1)}}.chat-error{flex-shrink:0;margin:0 10px 6px;padding:10px 12px;border-radius:8px;background:#f871711f;color:var(--danger);font-size:.85rem}.composer-box{flex-shrink:0;margin:0 8px max(8px,env(safe-area-inset-bottom));border:1px solid var(--border);border-radius:16px;background:var(--bg-elevated);overflow:hidden}.composer-attachments{display:flex;flex-wrap:wrap;gap:6px;padding:8px 8px 0}.attach-chip{display:flex;align-items:center;gap:6px;max-width:100%;padding:4px 8px 4px 4px;border-radius:8px;background:var(--bg);border:1px solid var(--border);font-size:.75rem}.attach-chip-thumb{width:28px;height:28px;border-radius:4px;object-fit:cover}.attach-chip-icon{font-size:.9rem}.attach-chip-name{max-width:120px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.attach-chip-size{color:var(--text-muted);flex-shrink:0}.attach-chip-remove{border:none;background:transparent;color:var(--text-muted);cursor:pointer;font-size:1rem;line-height:1;padding:0 2px}.composer-input{display:block;width:100%;resize:none;min-height:44px;max-height:140px;padding:12px 14px 8px;border:none;background:transparent;color:var(--text);outline:none}.composer-bar{display:flex;align-items:flex-end;gap:6px;padding:6px 8px 8px;border-top:1px solid var(--border)}.composer-attach{flex-shrink:0;width:36px;height:36px;border:none;border-radius:8px;background:var(--bg);cursor:pointer;font-size:1rem}.composer-attach:disabled{opacity:.35;cursor:not-allowed}.composer-file-input{display:none}.composer-model-wrap{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.composer-model{width:100%;padding:7px 28px 7px 10px;border-radius:8px;border:1px solid transparent;background:var(--bg);color:var(--text);font-size:.8rem;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca3af' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 6.646a.5.5 0 0 1 .708 0L8 9.293l2.646-2.647a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}.composer-model-hint{display:none;font-size:.68rem;color:var(--text-muted);padding-left:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.composer-send{flex-shrink:0;width:40px;height:40px;border-radius:10px;border:none;background:var(--accent);color:#fff;font-size:1.15rem;cursor:pointer}.composer-send:disabled{opacity:.35;cursor:not-allowed}@media (min-width: 900px){.app-root{position:static;height:100dvh;display:grid;grid-template-columns:var(--sidebar-w) 1fr}.side-scrim{display:none}.side-nav{position:static;transform:none;pointer-events:auto;width:auto;z-index:1}.side-nav--open{transform:none}.side-nav-close,.icon-btn--menu{display:none}.composer-model-hint{display:block}}