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ease}.canvas__node:hover{background:var(--surface-strong)}.canvas__node--active{border-color:var(--accent);background:var(--surface-strong)}.canvas__node-title{flex:1;min-width:0;padding:8px 4px;font-size:.88rem;color:var(--text);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.canvas__pin-mark{display:inline-flex;margin-right:4px;vertical-align:-1px;color:var(--text-muted)}.canvas__rename-input{flex:1;min-width:0;background:var(--surface-strong);border:1px solid var(--text-muted);color:var(--text);border-radius:8px;padding:8px 10px;font-size:.88rem;margin:1px}.canvas__node-actions{display:flex;gap:2px;opacity:0;pointer-events:none;transition:opacity .15s ease;flex-shrink:0}.canvas__node:hover .canvas__node-actions{opacity:1;pointer-events:auto}.canvas__node-actions button{display:flex;align-items:center;justify-content:center;background:none;border:none;color:var(--text-muted);cursor:pointer;padding:5px;border-radius:6px;line-height:1}.canvas__node-actions 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button{display:inline-flex;align-items:center;gap:4px;background:none;border:none;color:var(--text-muted);font-size:.78rem;padding:3px 8px;border-radius:6px;cursor:pointer;transition:background-color .2s ease,color .2s ease}.chat__message-actions button:disabled{cursor:default;opacity:.6}.chat__message-actions button:hover{background:var(--surface-strong);color:var(--text)}.model-select{position:relative;flex-shrink:0;min-width:0}.model-select__trigger{display:flex;align-items:center;gap:4px;max-width:150px;background:transparent;border:none;border-right:1px solid var(--surface-border);color:var(--text-muted);padding:8px 10px 8px 12px;margin-right:4px;font-size:.8rem;cursor:pointer;transition:color .2s ease}.model-select__trigger-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.model-select__trigger:hover{color:var(--text)}.model-select__menu{position:absolute;bottom:calc(100% + 8px);left:0;display:flex;flex-direction:column;gap:2px;min-width:210px;max-height:340px;overflow-y:auto;padding:6px;background:var(--surface-strong);border:1px solid var(--surface-border);border-radius:14px;box-shadow:0 12px 28px var(--shadow);z-index:10;animation:fadeInUp .15s ease both}.model-select__group+.model-select__group{margin-top:4px;padding-top:4px;border-top:1px solid var(--surface-border)}.model-select__group-label{padding:4px 10px 2px;font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.model-select__option{background:none;border:1px solid transparent;color:var(--text-muted);text-align:left;padding:8px 10px;border-radius:8px;font-size:.85rem;cursor:pointer;white-space:nowrap;transition:background-color .15s ease,color .15s ease,border-color .15s ease}.model-select__option:hover{background:var(--surface-border);color:var(--text)}.model-select__option--active{color:var(--text);border-color:var(--accent)}.chat__typing{display:inline-flex;gap:6px;padding:4px 2px}.chat__typing span{width:8px;height:8px;border-radius:50%;background:var(--text-muted);animation:typingDot 1.2s infinite ease-in-out}.chat__typing span:nth-child(2){animation-delay:.2s}.chat__typing span:nth-child(3){animation-delay:.4s}.chat__form-wrap{max-width:760px;width:calc(100% - 48px);margin:0 auto 24px;display:flex;flex-direction:column;gap:8px}.chat__form{display:flex;align-items:flex-end;gap:8px;padding:8px 8px 8px 16px;background:var(--surface-strong);border:1px solid var(--surface-border);border-radius:22px;box-shadow:0 12px 28px var(--shadow)}.chat__form textarea{flex:1;min-width:0;background:transparent;border:none;padding:10px 0;margin:0;resize:none;max-height:200px;overflow-y:auto;font-family:inherit;font-size:1rem;line-height:1.4;color:var(--text)}.chat__form textarea::placeholder{color:var(--text-muted)}.chat__form textarea:focus{outline:none}.chat__attach-button{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:32px;height:32px;background:none;border:none;color:var(--text-muted);border-radius:50%;cursor:pointer;transition:background-color .2s ease,color .2s ease}.chat__attach-button:hover:not(:disabled){background:var(--surface-border);color:var(--text)}.chat__attach-button:disabled{opacity:.4;cursor:not-allowed}.chat__attachments{display:flex;gap:8px;flex-wrap:wrap;padding:0 4px}.chat__attachment{position:relative;width:56px;height:56px;border-radius:10px;overflow:hidden;border:1px solid var(--surface-border)}.chat__attachment img{width:100%;height:100%;object-fit:cover}.chat__attachment button{position:absolute;top:2px;right:2px;width:18px;height:18px;display:flex;align-items:center;justify-content:center;background:#0009;color:#fff;border:none;border-radius:50%;cursor:pointer;padding:0}.chat__form .button-primary{width:40px;height:40px;padding:0;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:1.2rem;line-height:1}.markdown p{margin:0 0 10px}.markdown p:last-child{margin-bottom:0}.markdown pre{background:#00000040;padding:12px 14px;border-radius:10px;overflow-x:auto;font-size:.85rem}.markdown code{background:var(--surface-strong);padding:2px 6px;border-radius:4px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.markdown pre code{background:none;padding:0}.markdown ul,.markdown ol{margin:8px 0;padding-left:20px}.markdown a{color:var(--text)}.markdown h1,.markdown h2,.markdown h3{font-family:var(--font-display);margin:14px 0 6px}.markdown blockquote{border-left:3px solid var(--text-muted);margin:8px 0;padding-left:12px;color:var(--text-muted)}.onboarding{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:24px;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeInUp .25s ease both}.onboarding__card{position:relative;width:100%;max-width:440px;background:var(--surface);border:1px solid var(--surface-border);border-radius:20px;padding:36px 32px 28px;box-shadow:0 24px 60px var(--shadow);text-align:center}.onboarding__close{position:absolute;top:14px;right:14px;display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:none;border:none;border-radius:8px;color:var(--text-muted);cursor:pointer;transition:background-color .2s ease,color .2s ease}.onboarding__close:hover{background:var(--surface-strong);color:var(--text)}.onboarding__icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;margin-bottom:18px;border-radius:16px;background:var(--surface-strong);border:1px solid var(--surface-border);color:var(--text)}.onboarding__title{font-family:var(--font-display);font-size:1.4rem;font-weight:700;margin:0 0 10px;color:var(--text)}.onboarding__body{margin:0 auto;max-width:360px;font-size:.95rem;line-height:1.5;color:var(--text-muted)}.onboarding__dots{display:flex;justify-content:center;gap:8px;margin:24px 0 20px}.onboarding__dot{width:8px;height:8px;border-radius:50%;background:var(--surface-border);cursor:pointer;transition:background-color .2s ease,transform .2s ease}.onboarding__dot--active{background:var(--text);transform:scale(1.15)}.onboarding__actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.onboarding__ghost{background:none;border:none;color:var(--text-muted);font-size:.9rem;padding:10px 14px;border-radius:10px;cursor:pointer;transition:color .2s ease}.onboarding__ghost:hover{color:var(--text)}.onboarding__primary{background:var(--text);color:var(--accent-contrast);border:none;font-size:.9rem;font-weight:600;padding:10px 22px;border-radius:10px;cursor:pointer;transition:opacity .2s ease}.onboarding__primary:hover{opacity:.88}.app-shell--mobile{flex-direction:column;min-height:0}.mobile-bar{display:flex;align-items:center;gap:8px;flex-shrink:0;padding:8px 10px;border-bottom:1px solid var(--surface-border);background:var(--surface)}.mobile-bar__menu,.mobile-bar__new{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:36px;height:36px;background:none;border:none;color:var(--text-muted);border-radius:9px;cursor:pointer}.mobile-bar__menu:hover,.mobile-bar__new:hover{background:var(--surface-strong);color:var(--text)}.mobile-bar__crumbs{flex:1;min-width:0;display:flex;align-items:center;gap:4px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}.mobile-bar__crumbs::-webkit-scrollbar{display:none}.mobile-bar__crumb{background:none;border:none;color:var(--text-muted);font-size:.85rem;padding:4px 2px;cursor:pointer;max-width:160px;overflow:hidden;text-overflow:ellipsis}.mobile-bar__crumb--current{color:var(--text);font-weight:600;cursor:default}.mobile-bar__sep{color:var(--text-muted);opacity:.6;font-size:.85rem}.app-shell--mobile .chat{flex:1;width:100%;border-left:none}.chat__branch-chips{display:flex;flex-wrap:wrap;gap:6px;align-self:flex-start;max-width:85%;margin:2px 0 4px 8px;padding-left:10px;border-left:2px solid var(--surface-border)}.chat__branch-chip{display:inline-flex;align-items:center;gap:5px;max-width:220px;background:var(--surface-strong);border:1px solid var(--surface-border);color:var(--text-muted);font-size:.8rem;padding:5px 10px;border-radius:14px;cursor:pointer;transition:border-color .15s ease,color .15s ease}.chat__branch-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat__branch-chip:hover{color:var(--text);border-color:var(--text-muted)}.chat__branch-orphans{display:flex;flex-direction:column;gap:6px;margin-top:8px;padding-top:10px;border-top:1px dashed var(--surface-border)}.chat__branch-orphans-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.chat__branch-orphans .chat__branch-chips{border-left:none;padding-left:0;margin-left:0;max-width:100%}.sidebar-drawer{position:fixed;top:0;left:0;bottom:0;z-index:60;transform:translate(-100%);transition:transform .25s ease;box-shadow:0 0 40px var(--shadow)}.sidebar-drawer--open{transform:translate(0)}.sidebar-drawer .sidebar{height:100%}.drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#00000073;animation:fadeInUp .2s ease both}.app-shell--mobile .chat__form-wrap{width:calc(100% - 24px);margin-bottom:12px}.app-shell--mobile .chat__log{padding:8px 14px}.site-footer{background:transparent;border-top:1px solid var(--surface-border);color:var(--text-muted);padding:32px 24px}.site-footer__inner{max-width:var(--container-width);margin:0 auto;display:flex;align-items:center;gap:12px;font-size:.9rem}.site-footer__contact{margin-left:auto;color:var(--text-muted);text-decoration:none;transition:color .2s ease}.site-footer__contact:hover{color:var(--text)}@media (max-width: 900px){.hero{grid-template-columns:1fr;gap:56px;padding-top:120px}.hero__content{max-width:none}.hero__manifesto{justify-self:stretch;max-width:none}}@media (max-width: 640px){.site-nav__links>a:not(.site-nav__cta){display:none}}