.playground-root{--pg-brand:#1de57b;--pg-brand-ink:#07130c;--pg-brand-tint:rgba(29,229,123,.1);--pg-brand-tint-strong:rgba(29,229,123,.35);--pg-bg:#fff;--pg-subtle:#f7f7f5;--pg-hover:#f1f1ef;--pg-rail:#fafbfa;--pg-rail-hover:#f4f6f5;--pg-text:#242724;--pg-secondary:#555b57;--pg-muted:#777d79;--pg-border:#e3e5e3;--pg-strong:#c9ccc9;--pg-error:#dc2626;--pg-radius:8px;--pg-radius-control:6px;--pg-font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--pg-font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;background:var(--pg-bg);color:var(--pg-text);font-family:var(--pg-font-sans);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}.pg-workspace{display:grid;grid-template-columns:208px minmax(0,1fr);height:calc(100vh - 56px);margin-top:56px;overflow:hidden}.pg-rail{background:var(--pg-rail);border-right:1px solid var(--pg-border);display:flex;flex-direction:column;min-height:0}.pg-rail-head{align-items:center;border-bottom:1px solid var(--pg-border);display:flex;height:57px;padding:0 16px}.pg-rail-head h1{font-size:20px;font-weight:600;line-height:1.2;margin:0}.pg-modes{border-bottom:1px solid var(--pg-border);padding:8px 8px 12px}.pg-mode{align-items:center;background:transparent;border:0;border-radius:var(--pg-radius-control);color:var(--pg-secondary);cursor:pointer;display:flex;gap:10px;height:44px;padding:0 10px;position:relative;text-align:left;transition:background .12s ease,color .12s ease;width:100%}.pg-mode:hover{background:var(--pg-rail-hover)}.pg-mode--active{background:transparent;color:var(--pg-text)}.pg-mode--active:before{background:var(--pg-brand);bottom:0;content:"";left:0;position:absolute;top:0;width:3px}.pg-mode-icon{border:1px solid var(--pg-strong);border-radius:4px;display:grid;font:11px var(--pg-font-mono);height:24px;place-items:center;width:24px}.pg-mode-label{font-size:14px}.pg-rail-history{display:flex;flex:1;flex-direction:column;min-height:0;overflow:hidden}.pg-rail-history-title{align-items:center;color:var(--pg-muted);display:flex;flex:0 0 36px;font-size:12px;height:36px;padding:0 16px}.pg-rail-history-groups{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:0 8px 12px}.pg-rail-history-group{border-bottom:1px solid var(--pg-border)}.pg-rail-history-group:last-child{border-bottom:0}.pg-rail-history-group summary{align-items:center;color:var(--pg-secondary);cursor:pointer;display:flex;font-size:13px;font-weight:600;gap:8px;list-style:none;min-height:40px;padding:0 8px}.pg-rail-history-group summary::-webkit-details-marker{display:none}.pg-rail-history-group summary:before{color:var(--pg-muted);content:"▶";font-size:8px;transition:transform .15s}.pg-rail-history-group[open] summary:before{transform:rotate(90deg)}.pg-rail-history-count{color:var(--pg-muted);font-size:11px;font-weight:400;margin-left:auto}.pg-rail-history-list{display:grid;gap:2px;padding:0 0 8px 16px}.pg-rail-history-item{background:transparent;border:0;border-radius:5px;color:var(--pg-secondary);cursor:pointer;font-size:12px;min-width:0;overflow:hidden;padding:8px;text-align:left;text-overflow:ellipsis;transition:background .12s ease,color .12s ease;white-space:nowrap;width:100%}.pg-rail-history-item:hover{background:var(--pg-rail-hover);color:var(--pg-text)}.pg-rail-history-clear{background:transparent;border:0;border-radius:5px;color:var(--pg-muted);cursor:pointer;font-size:12px;padding:8px;text-align:left;width:100%}.pg-rail-history-clear:hover{color:var(--pg-error)}.pg-rail-history-new{background:transparent;border:1px dashed var(--pg-strong);border-radius:5px;color:var(--pg-secondary);cursor:pointer;font-size:12px;margin-bottom:4px;padding:8px;text-align:left;width:100%}.pg-rail-history-new:hover{background:var(--pg-brand-tint);border-color:var(--pg-brand);color:var(--pg-text)}.pg-rail-history-empty{color:var(--pg-muted);font-size:12px;padding:8px}.pg-main{display:grid;grid-template-rows:57px minmax(0,1fr);min-height:0;min-width:0}.pg-toolbar{align-items:center;border-bottom:1px solid var(--pg-border);display:flex;gap:10px;padding:0 16px}.pg-task-title{font-size:15px;font-weight:600}.pg-mode-tabs-mobile{display:none}.pg-stage{background:var(--pg-bg);min-height:0;overflow:auto;position:relative}.pg-stage-panel{min-height:100%;padding:0}.pg-stage-panel--form{padding:24px}.pg-empty-mark,.pg-label,.pg-mode-icon,.pg-result-url,.pg-tab small{font-family:var(--pg-font-mono)}.pg-form-preview{align-items:start;display:grid;gap:24px;grid-template-columns:minmax(300px,400px) minmax(0,1fr)}.pg-form{background:var(--pg-bg);border:1px solid var(--pg-border);border-radius:var(--pg-radius);display:flex;flex-direction:column;gap:11px;padding:20px}.pg-label{color:var(--pg-secondary);font-size:12px;font-weight:600;letter-spacing:.12em;margin-top:4px;text-transform:uppercase}.pg-input,.pg-select,.pg-textarea{background:var(--pg-bg);border:1px solid var(--pg-strong);border-radius:var(--pg-radius-control);color:var(--pg-text);font-family:inherit;font-size:14px;padding:10px;transition:border-color .15s,box-shadow .15s;width:100%}.pg-input:focus,.pg-select:focus,.pg-textarea:focus{border-color:var(--pg-brand);box-shadow:0 0 0 3px var(--pg-brand-tint);outline:none}.pg-textarea{line-height:1.5;resize:vertical}.pg-textarea--block{width:100%}.pg-row2{display:grid;gap:10px;grid-template-columns:1fr 1fr}.pg-check{align-items:center;color:var(--pg-text);display:flex;font-size:14px;gap:8px}.pg-check input{accent-color:var(--pg-brand)}.pg-btn{background:var(--pg-bg);border:1px solid var(--pg-strong);border-radius:var(--pg-radius-control);color:var(--pg-text);cursor:pointer;font-size:14px;font-weight:600;padding:10px 16px;transition:background .15s,border-color .15s,opacity .15s,transform .05s}.pg-btn:hover:not(:disabled){background:var(--pg-brand-tint);border-color:var(--pg-brand)}.pg-btn:active:not(:disabled){transform:translateY(1px)}.pg-btn:disabled{cursor:not-allowed;opacity:.45}.pg-btn--primary{background:var(--pg-brand);border-color:var(--pg-brand);color:var(--pg-brand-ink)}.pg-btn--primary:hover:not(:disabled){background:#16d070;border-color:#16d070}.pg-btn--danger{background:transparent;border-color:var(--pg-error);color:var(--pg-error)}.pg-btn--danger:hover:not(:disabled){background:#dc262614}.pg-err{align-items:flex-start;color:var(--pg-error);display:flex;flex-direction:column;font-size:13px;gap:8px}.pg-result{background:transparent;border:1px dashed var(--pg-strong);border-radius:var(--pg-radius);justify-content:center;min-height:440px;padding:24px}.pg-result,.pg-result-state{align-items:center;display:flex;flex-direction:column;gap:12px}.pg-result-state{color:var(--pg-muted);font-size:14px;text-align:center}.pg-result-img,.pg-result-video{align-items:center;display:flex;flex-direction:column;gap:10px;width:100%}.pg-result-img img,.pg-result-video video{border:1px solid var(--pg-border);border-radius:var(--pg-radius-control);box-shadow:0 4px 16px #24272414;max-width:100%}.pg-result-url{font-size:13px;word-break:break-all}.pg-result-url a{color:var(--pg-text);text-decoration-color:var(--pg-brand);text-underline-offset:4px}.pg-result-url a:hover{text-decoration:underline}.pg-result-download{align-items:center;display:inline-flex;justify-content:center;margin-top:4px;min-height:36px;padding:0 16px;text-decoration:none}.pg-result--full{background:transparent;border:0;height:100%;justify-content:center;min-height:100%}.pg-result--full .pg-result-img img,.pg-result--full .pg-result-video video{max-height:calc(100vh - 200px);width:auto}.pg-spinner{animation:pgSpin .8s linear infinite;border:3px solid var(--pg-border);border-radius:50%;border-top-color:var(--pg-brand);height:28px;width:28px}@keyframes pgSpin{to{transform:rotate(1turn)}}.pg-chat-stage{display:flex;flex-direction:column;inset:0;min-height:0;position:absolute}.pg-messages{display:flex;flex:1;flex-direction:column;gap:22px;min-height:0;overflow-y:auto;padding:28px 24px 24px}.pg-messages.pg-empty{display:grid;overflow:hidden;padding:48px 24px 24px;place-items:center}.pg-empty-inner{text-align:center;width:min(680px,100%)}.pg-empty-mark{background:var(--pg-brand-tint);border:1px solid var(--pg-strong);border-radius:12px;display:grid;font-size:13px;height:48px;margin:0 auto 18px;place-items:center;width:48px}.pg-empty-inner h2{font-size:24px;font-weight:600;margin:0 0 8px}.pg-empty-inner p{color:var(--pg-secondary);margin:0 auto;max-width:520px}.pg-prompts{display:grid;gap:8px;grid-template-columns:repeat(3,1fr);margin-top:24px}.pg-prompt{background:var(--pg-bg);border:1px solid var(--pg-border);border-radius:var(--pg-radius);color:var(--pg-secondary);cursor:pointer;min-height:66px;padding:10px 12px;text-align:left;transition:border-color .15s,background .15s}.pg-prompt:hover{background:var(--pg-subtle);border-color:var(--pg-strong)}.pg-prompt strong{color:var(--pg-text);display:block;font-size:13px;font-weight:600;margin-bottom:3px}.pg-prompt span{display:block;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pg-msg{display:flex}.pg-msg--user{justify-content:flex-end}.pg-msg--assistant{justify-content:flex-start}.pg-msg-bubble{border-radius:var(--pg-radius-control);font-size:14px;line-height:1.6;max-width:82%;padding:10px 14px;white-space:pre-wrap;word-break:break-word}.pg-msg--user .pg-msg-bubble{background:var(--pg-brand);border:1px solid var(--pg-brand);color:var(--pg-brand-ink)}.pg-msg--assistant .pg-msg-bubble{background:var(--pg-bg);border:1px solid var(--pg-border);color:var(--pg-text)}.pg-think{background:var(--pg-subtle);border:1px solid var(--pg-border);border-radius:var(--pg-radius-control);color:var(--pg-secondary);font-size:13px;margin:0 0 8px;padding:8px 12px}.pg-think summary{color:var(--pg-secondary);cursor:pointer;font-weight:500;list-style:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.pg-think summary:before{content:"▶";display:inline-block;font-size:10px;margin-right:6px;transition:transform .15s}.pg-think[open] summary:before{transform:rotate(90deg)}.pg-think summary::-webkit-details-marker{display:none}.pg-think-body{border-top:1px solid var(--pg-border);line-height:1.55;margin-top:8px;padding-top:8px;white-space:pre-wrap}.pg-think--active summary{color:var(--pg-brand-ink)}.pg-composer-wrap{background:linear-gradient(transparent,var(--pg-bg) 28%);bottom:0;flex:none;left:0;padding:18px 24px 22px;position:sticky;right:0}.pg-composer{background:var(--pg-bg);border:1px solid var(--pg-strong);border-radius:12px;box-shadow:0 8px 24px #24272414;margin:0 auto;padding:10px;width:min(896px,100%)}.pg-composer:focus-within{border-color:var(--pg-brand)}.pg-composer-textarea{background:transparent;border:0;min-height:58px;outline:0;padding:4px 6px;resize:none;width:100%}.pg-composer-foot{align-items:center;display:flex;gap:8px}.pg-composer-model{font-size:13px;padding:0 28px 0 10px;width:168px}.pg-attach,.pg-composer-model{background:var(--pg-bg);border:1px solid var(--pg-border);border-radius:var(--pg-radius-control);height:32px}.pg-attach{align-items:center;cursor:pointer;display:inline-flex;font-size:16px;justify-content:center;transition:border-color .15s;width:38px}.pg-attach:hover:not(.pg-attach--disabled){border-color:var(--pg-brand)}.pg-attach input[type=file]{display:none}.pg-attach--disabled{cursor:not-allowed;opacity:.4}.pg-attach-preview{border:1px solid var(--pg-border);border-radius:var(--pg-radius-control);height:32px;-o-object-fit:cover;object-fit:cover;width:32px}.pg-send{background:var(--pg-brand);border:0;border-radius:var(--pg-radius-control);color:var(--pg-brand-ink);cursor:pointer;font-size:18px;height:36px;margin-left:auto;transition:filter .14s;width:36px}.pg-send:hover:not(:disabled){filter:brightness(.94)}.pg-send:disabled{cursor:not-allowed;opacity:.45}.pg-send--stop{background:var(--pg-bg);border:1px solid var(--pg-strong);color:var(--pg-text);font-size:13px;min-width:56px;width:auto}.pg-composer-err{margin:8px 24px 0}.pg-login-shell{justify-content:center;min-height:100%;padding:40px 24px}.pg-login-card,.pg-login-shell{align-items:center;background:var(--pg-bg);display:flex}.pg-login-card{border:1px solid var(--pg-border);border-radius:var(--pg-radius);flex-direction:column;gap:14px;max-width:420px;padding:36px 30px;text-align:center;width:100%}.pg-login-icon{align-items:center;background:var(--pg-brand);border:1px solid var(--pg-brand-tint-strong);border-radius:var(--pg-radius-control);color:var(--pg-brand-ink);display:inline-flex;font-size:11px;font-weight:700;height:30px;justify-content:center;letter-spacing:.12em;line-height:1;min-width:62px;padding:0 10px}.pg-login-card h3{color:var(--pg-text);font-size:18px;font-weight:700;margin:0}.pg-login-card p{color:var(--pg-secondary);font-size:14px;line-height:1.5;margin:0}.pg-login-card .pg-btn{display:inline-block;padding:10px 24px;text-decoration:none}@media(max-width:900px){.pg-workspace{grid-template-columns:56px minmax(0,1fr)}.pg-mode-label,.pg-rail-head h1,.pg-rail-history{display:none}.pg-rail-head{justify-content:center;padding:0}.pg-modes{padding:8px 6px}.pg-mode{justify-content:center;padding:0}.pg-form-preview{grid-template-columns:1fr}}@media(max-width:640px){.pg-workspace{display:block;height:auto;min-height:calc(100vh - 56px)}.pg-rail{display:none}.pg-main{grid-template-rows:auto auto minmax(0,1fr)}.pg-mode-tabs-mobile{border-bottom:1px solid var(--pg-border);display:grid;grid-template-columns:repeat(3,1fr);height:48px}.pg-mode-tabs-mobile button{background:var(--pg-bg);border:0;color:var(--pg-secondary);cursor:pointer;font-size:14px}.pg-mode-tabs-mobile button.active{box-shadow:inset 0 -2px var(--pg-brand);color:var(--pg-text);font-weight:600}.pg-stage-panel--form{padding:16px}.pg-prompts{grid-template-columns:1fr}.pg-prompt:nth-child(n+3){display:none}.pg-composer-model{flex:1;min-width:0}.pg-messages{padding:24px 16px}.pg-chat-stage,.pg-composer-wrap{position:static}}@media(prefers-reduced-motion:reduce){.pg-spinner{animation:none!important}}