:root{--paper:#f5f3ee;--surface:#fbfaf7;--ink:#1d2527;--muted:#656d6c;--line:#d7d9d2;--accent:#b94b2b;--green:#dbe7df;--display:"Songti SC","Noto Serif CJK SC","SimSun",serif;--body:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;--mono:Menlo,monospace}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:14px/1.6 var(--body);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button:disabled{opacity:.45;cursor:wait}button[hidden],[hidden]{display:none!important}p{text-wrap:pretty}button{transition:background .16s,border-color .16s}button:active{transform:translateY(1px)}.demo-notice{min-height:34px;padding:7px 24px;background:#e9e5db;color:#625e54;font-size:11px;display:flex;justify-content:center;gap:24px}.demo-notice a{text-decoration:underline;text-underline-offset:3px}.app-shell{display:grid;grid-template-columns:216px minmax(0,1fr);min-height:calc(100vh - 34px)}.sidebar{padding:28px 20px;background:#edece6;border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.app-brand{font-size:25px;font-weight:600;letter-spacing:-1px;line-height:1.2}.app-brand span{display:block;font-size:10px;font-weight:400;letter-spacing:.06em;color:var(--muted);margin-top:9px}.project-label{margin-top:42px;font-size:10px;color:var(--muted);display:flex;align-items:center;gap:7px}.scope-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#4c7864;flex-shrink:0}.project-title{font:600 22px/1.5 var(--display);margin:8px 0 26px}.side-nav{display:grid;gap:6px}.side-nav button,.side-nav a{border:0;background:transparent;border-radius:5px;display:flex;justify-content:space-between;align-items:center;width:100%;padding:11px 12px;text-align:left;font-size:12px;color:var(--muted);min-height:42px}.side-nav button.active{background:#fff;color:var(--ink)}.side-nav a:hover,.side-nav button:hover{background:#f8f7f2;color:var(--ink)}.side-nav span{font:10px var(--mono);color:var(--muted)}.session-heading{margin:34px 10px 12px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:10px}.session-heading button{border:0;background:transparent;font-size:21px;line-height:1;width:30px;height:30px}.session-item{width:100%;border:0;text-align:left;background:transparent;border-radius:4px;padding:10px 11px;font-size:11px;color:var(--muted);display:block;overflow-wrap:anywhere}.session-item.active{background:#e2e2d9;color:var(--ink)}.scope-note{margin-top:auto;padding-top:60px;font-size:10px;color:var(--muted)}.scope-note strong{font-weight:500;margin-left:6px}.scope-note p{margin:10px 0;line-height:1.8}.scope-note a{border-bottom:1px solid var(--line)}.app-main{min-width:0}.workspace-header{min-height:110px;border-bottom:1px solid var(--line);padding:24px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.overline{font:9px var(--mono);letter-spacing:.12em;color:var(--muted);margin:0 0 8px;display:block}.workspace-header h1{font-size:22px;font-weight:500;margin:0;letter-spacing:-.02em}.header-actions{display:flex;align-items:center;gap:18px}.prototype-tag{font-size:10px;padding:5px 9px;background:var(--green);border-radius:4px;color:#3d5a4b}.text-button{background:none;border:0;padding:5px 0;font-size:11px;color:var(--muted)}.text-button:hover{color:var(--accent)}.editor-layout{display:grid;grid-template-columns:minmax(320px,390px) minmax(0,1fr);min-height:calc(100vh - 144px)}.compose-column{padding:28px;border-right:1px solid var(--line);background:var(--surface);min-width:0}.intro h2{font:600 32px/1.3 var(--display);margin:0 0 12px;letter-spacing:-.04em}.intro p{font-size:12px;color:var(--muted);margin:0 0 28px;line-height:1.8}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:13px}.panel-heading h3{font-size:12px;font-weight:500;margin:0}.drop-zone{border:1px dashed #b6bdb4;border-radius:6px;text-align:center;padding:22px 14px;background:#f6f5ef}.drop-zone.dragover{border-color:var(--accent);background:#f3e4dc}.upload-plus{display:block;font-size:24px;line-height:1;margin-bottom:9px;color:var(--muted)}.drop-zone strong{display:block;font-size:12px;font-weight:500}.drop-zone p{font-size:10px;margin:4px 0 13px;color:var(--muted)}.outline-button{background:transparent;border:1px solid #bcc2b9;border-radius:5px;padding:9px 13px;font-size:11px;min-height:36px}.outline-button:hover{border-color:var(--ink);background:#eceee7}.primary-button{background:var(--ink);color:#f5f3ee;border:1px solid var(--ink);border-radius:5px;padding:11px 15px;font-size:12px;font-weight:500;display:inline-flex;justify-content:center;align-items:center;gap:20px;min-height:40px}.primary-button:hover{background:#354b43;border-color:#354b43}.attachment-list{display:grid;gap:6px;margin-top:10px}.attachment{display:flex;align-items:center;gap:9px;padding:9px 10px;background:#eeeee7;border-radius:4px;min-width:0}.attachment>span{font:8px var(--mono);color:var(--muted);flex-shrink:0}.attachment>div{flex:1;min-width:0}.attachment strong{font-size:10px;font-weight:500;display:block;overflow-wrap:anywhere}.attachment small{font-size:9px;color:var(--muted)}.attachment button{border:0;background:none;color:var(--muted);padding:3px 6px;font-size:17px}.small-note{font-size:10px;color:var(--muted);line-height:1.7;margin:10px 0 0}.brief-section{margin-top:26px}.brief-section>label{display:block;font-size:12px;font-weight:500;margin-bottom:10px}textarea{display:block;width:100%;resize:vertical;min-height:140px;padding:14px;border:1px solid var(--line);border-radius:6px;background:#fff;font-size:12px;line-height:1.85}textarea:focus{border-color:var(--accent)}.prompt-presets{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 17px}.prompt-presets button{background:none;border:1px solid var(--line);border-radius:4px;padding:5px 8px;font-size:9px;color:var(--muted)}.prompt-presets button:hover{border-color:var(--muted)}.brief-section .checkbox-label{font-size:10px;font-weight:400;color:var(--muted);display:flex;align-items:center;gap:6px;margin:0 0 18px}.checkbox-label input{accent-color:#355e4b;width:13px;height:13px}.run-actions{display:flex;gap:8px;flex-wrap:wrap}.run-actions .primary-button{flex:1}.input-error{font-size:11px;color:#a63c22;background:#f4e6de;padding:10px 12px;border-radius:4px;margin:12px 0}.run-panel{margin-top:25px;padding:17px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.run-caption{font-size:9px;color:var(--muted)}#run-steps{list-style:none;padding:0;margin:0;display:grid;gap:9px}#run-steps li{display:flex;gap:11px;align-items:center;color:var(--muted);font-size:11px}#run-steps li:before{content:"";width:7px;height:7px;display:block;border:1px solid #b7c1b6;border-radius:50%}#run-steps li.done:before{background:#4c7864;border-color:#4c7864}#run-steps li.active{color:var(--ink)}#run-steps li.active:before{border:2px solid var(--accent);box-shadow:0 0 0 3px #b94b2b15}.conversation-section{margin-top:28px}.empty-conversation{font-size:11px;color:var(--muted);padding:10px 0;line-height:1.8}.message{font-size:11px;line-height:1.8;padding:13px 0;border-top:1px solid var(--line)}.message strong{font-size:10px;color:var(--muted);display:block;margin-bottom:7px;font-weight:500}.message p{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.message.assistant p{color:#3c5e4d}.preview-column{padding:24px;min-width:0}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:18px}.preview-toolbar strong{font-size:13px;font-weight:500}.preview-actions{display:flex;gap:14px;align-items:center;font-size:10px;color:var(--muted)}.preview-actions a:hover{color:var(--accent)}.preview-options{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.preview-options select{font-size:11px;border:0;background:transparent;min-width:0;padding:7px 0;max-width:170px}.segmented{display:flex;padding:3px;background:#e7e7df;border-radius:5px}.segmented button{background:none;border:0;padding:6px 10px;font-size:10px;color:var(--muted);border-radius:3px;white-space:nowrap}.segmented button.selected{background:#fff;color:var(--ink);box-shadow:0 1px 3px #1d252710}.placement{font-size:10px;display:flex;gap:12px;margin-bottom:14px;align-items:center;flex-wrap:wrap;color:var(--muted)}.placement strong{font-weight:400;color:var(--ink)}.preview-canvas{background:#e2e4dd;border:1px solid var(--line);border-radius:6px;padding:12px;overflow:hidden;display:flex;justify-content:center;min-height:650px}.preview-canvas iframe{width:100%;height:calc(100vh - 290px);min-height:630px;border:0;background:#f5f3ee;box-shadow:0 2px 10px #1d25270b}.preview-canvas.mobile iframe{width:390px;max-width:100%}.draft-actions{margin-top:15px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.draft-actions>span{font-size:11px;color:var(--muted);margin-right:auto}.draft-actions .primary-button{padding:8px 12px;min-height:36px;font-size:11px}.data-view{padding:35px;max-width:1300px}.section-intro h2{font:600 34px var(--display);margin:0 0 15px}.section-intro p{font-size:13px;color:var(--muted);max-width:650px;margin:0 0 35px}.table-toolbar{display:flex;gap:12px;align-items:center;margin-bottom:24px;flex-wrap:wrap}.table-toolbar input{border:1px solid var(--line);border-radius:5px;background:var(--surface);padding:10px 13px;min-width:180px;flex:1;font-size:12px}.table-toolbar select{font-size:11px;border:1px solid var(--line);border-radius:5px;background:none;padding:10px}.asset-table{border-collapse:collapse;width:100%;font-size:12px}.asset-table th{text-align:left;font-size:10px;font-weight:400;color:var(--muted);border-bottom:1px solid var(--ink);padding:12px 15px}.asset-table td{padding:19px 15px;border-bottom:1px solid var(--line);vertical-align:middle}.asset-table td:first-child{overflow-wrap:anywhere;max-width:420px}.asset-table td small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.asset-table td .outline-button{white-space:nowrap}.file-status{font-size:10px;padding:5px 8px;background:var(--green);color:#3d5a4b;white-space:nowrap}.file-status.private{background:#e9e7df;color:#6b685f}.file-help{border-top:1px solid var(--ink);padding-top:22px;margin-top:50px;max-width:650px}.file-help h3{font:600 23px var(--display)}.file-help p{font-size:12px;color:var(--muted)}.empty-state{padding:55px 25px;text-align:center;border:1px dashed #b8bfb5;color:var(--muted)}.empty-state h3{font:600 24px var(--display);color:var(--ink);margin-top:0}.empty-state p{font-size:12px}.revision{display:grid;grid-template-columns:110px 1fr auto;gap:25px;border-top:1px solid var(--line);padding:28px 0;align-items:start}.revision:first-child{border-top:1px solid var(--ink)}.revision .rev-number{font:20px var(--mono)}.revision .rev-number small{display:block;font:10px var(--body);margin-top:9px;color:var(--muted)}.revision h3{font:600 22px var(--display);margin:0 0 10px}.revision p{font-size:12px;color:var(--muted);margin:6px 0}.revision .revision-actions{display:flex;gap:8px;flex-wrap:wrap}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);font-size:12px;line-height:1.6;padding:13px 22px;border-radius:6px;box-shadow:0 6px 22px #0002;z-index:100;max-width:calc(100% - 40px);text-align:center}
/* Style selection shares the workbench's vocabulary. */
.style-page{max-width:1500px;margin:auto;padding:28px 38px}.style-top{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:24px}.style-top h1{font:600 34px var(--display);margin:0}.style-top p{font-size:12px;color:var(--muted);margin:8px 0 0}.back-link{font-size:12px;color:var(--muted)}.type-tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);padding-top:15px;margin-bottom:26px}.type-tabs button{border:0;border-bottom:2px solid transparent;padding:15px 0;background:none;color:var(--muted);font-size:13px}.type-tabs button.active{color:var(--ink);border-bottom-color:var(--accent)}.style-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.style-option{border:1px solid var(--line);background:var(--surface);padding:12px;text-align:left;border-radius:6px}.style-option.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.thumbnail-shell{height:240px;position:relative;overflow:hidden;pointer-events:none;background:#eee}.thumbnail-shell iframe{width:850px;height:750px;border:0;transform:scale(.42);transform-origin:top left}.option-copy{padding:17px 8px 8px}.option-copy h2{font:600 24px var(--display);margin:0 0 8px;display:flex;justify-content:space-between}.option-copy h2 small{font:10px var(--mono);align-self:center;color:var(--muted)}.option-copy p{font-size:11px;color:var(--muted);margin:0}.style-detail-toolbar{display:flex;align-items:center;gap:18px;justify-content:space-between;margin:30px 0 16px}.style-detail-toolbar>p{font-size:12px;color:var(--muted);margin:0}.style-detail-toolbar .actions{display:flex;gap:10px;align-items:center}.style-large-preview{display:flex;justify-content:center;border:1px solid var(--line);padding:20px;background:#e2e4dd;min-height:800px}.style-large-preview iframe{width:100%;height:900px;max-width:1100px;border:0}.style-large-preview.mobile iframe{width:390px;max-width:100%}.saved-choices{display:flex;gap:16px;margin-top:20px;flex-wrap:wrap;color:var(--muted);font-size:11px}.style-count{font:11px var(--mono);color:var(--muted)}
@media(min-width:1700px){.editor-layout{grid-template-columns:460px minmax(0,1fr)}.compose-column{padding:36px}.preview-column{padding:30px}.intro h2{font-size:38px}}
@media(max-width:1150px){.app-shell{grid-template-columns:180px minmax(0,1fr)}.sidebar{padding:24px 15px}.project-title{font-size:20px}.editor-layout{grid-template-columns:minmax(290px,360px) minmax(0,1fr)}.compose-column{padding:22px}.preview-column{padding:18px}.preview-toolbar{align-items:flex-start}.preview-actions{flex-direction:column;align-items:flex-end;gap:7px}.preview-options{flex-wrap:wrap}.preview-canvas{padding:8px}.workspace-header{padding:24px}.thumbnail-shell iframe{transform:scale(.33)}.thumbnail-shell{height:210px}}
@media(max-width:950px){.editor-layout{grid-template-columns:1fr}.compose-column{border-right:0;border-bottom:1px solid var(--line)}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px}.intro p{margin:0 0 20px}.upload-section,.brief-section{max-width:none}.preview-canvas iframe{height:760px}.preview-options{flex-wrap:nowrap}.preview-actions{flex-direction:row;align-items:center}.style-grid{gap:10px}.thumbnail-shell{height:170px}.thumbnail-shell iframe{transform:scale(.25)}.style-page{padding:25px}.option-copy h2{font-size:21px;flex-wrap:wrap;gap:5px}.revision{grid-template-columns:70px 1fr}.revision-actions{grid-column:2}.data-view{padding:25px}.asset-table td,.asset-table th{padding:15px 8px}.asset-table td{font-size:11px}}
@media(max-width:650px){.demo-notice{font-size:9px;display:block;padding:8px 15px;line-height:1.6}.demo-notice a{margin-left:10px;white-space:nowrap}.app-shell{display:block}.sidebar{padding:18px;border-right:0;border-bottom:1px solid var(--line)}.app-brand{font-size:21px;display:flex;align-items:center;gap:14px}.app-brand span{margin:0;font-size:9px}.project-label,.project-title,.scope-note{display:none}.side-nav{display:flex;gap:4px;margin-top:18px;overflow-x:auto}.side-nav button,.side-nav a{font-size:10px;white-space:nowrap;padding:8px;min-height:36px;width:auto;flex-shrink:0;gap:10px}.side-nav span{display:none}.session-heading{margin:14px 0 5px}.session-item{padding:6px 9px;max-width:200px;display:inline-block}.workspace-header{min-height:88px;padding:19px}.workspace-header h1{font-size:20px}.header-actions{gap:10px}.prototype-tag{font-size:8px;padding:4px}.header-actions .text-button{font-size:10px}.compose-column{padding:23px 19px}.intro{display:block}.intro h2{font-size:33px}.intro p{font-size:11px}.intro p br{display:none}.preview-column{padding:20px 12px}.preview-toolbar{padding:0 6px}.preview-actions{gap:10px;font-size:9px}.preview-actions button{font-size:9px}.preview-options{gap:4px}.preview-options select{font-size:10px;max-width:130px}.segmented button{padding:7px 8px;font-size:9px}.preview-canvas{min-height:600px;padding:0}.preview-canvas iframe{min-height:600px;height:700px}.placement{padding:0 6px;font-size:9px}.draft-actions{padding-inline:5px}.draft-actions>span{width:100%}.data-view{padding:25px 18px}.section-intro h2{font-size:30px}.section-intro p{font-size:12px}.table-toolbar{gap:7px}.table-toolbar input{width:100%;flex-basis:100%}.asset-table td,.asset-table th{padding:14px 5px}.asset-table th:nth-child(2),.asset-table td:nth-child(2){display:none}.asset-table td .outline-button{font-size:10px;padding:7px 9px}.file-status{font-size:8px;padding:4px}.asset-table td:first-child{max-width:140px}.revision{gap:15px;grid-template-columns:55px 1fr}.revision h3{font-size:20px}.style-page{padding:22px 15px}.style-top{align-items:flex-start}.style-top h1{font-size:29px}.style-top p{font-size:11px}.back-link{font-size:10px;white-space:nowrap}.type-tabs{justify-content:space-between;gap:10px}.type-tabs button{font-size:11px}.style-grid{grid-template-columns:1fr}.style-option{display:grid;grid-template-columns:120px 1fr;gap:15px;padding:8px}.thumbnail-shell{height:110px}.thumbnail-shell iframe{transform:scale(.15)}.option-copy{padding:6px 0}.option-copy h2{font-size:23px;margin-bottom:10px;display:block}.option-copy h2 small{display:block;margin-top:5px}.option-copy p{font-size:10px}.style-detail-toolbar{flex-wrap:wrap;gap:15px}.style-detail-toolbar .actions{width:100%;justify-content:space-between}.style-large-preview{padding:0;min-height:700px}.style-large-preview iframe{height:850px}.style-count{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* Keep thumbnail iframe intrinsic widths out of grid sizing. */
.style-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.style-option{min-width:0;overflow:hidden}.thumbnail-shell{width:100%}.thumbnail-shell iframe{position:absolute;top:0;left:0}.option-copy{min-width:0}
@media(max-width:650px){.style-grid{grid-template-columns:minmax(0,1fr)}}
.mixed-demo-entry{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 0 5px}.mixed-demo-entry button{font-size:11px;background:#e1e7dd}.mixed-demo-entry a{font-size:10px;color:var(--muted)}