/* The frame and header share one geometry across source modes. */
html{scrollbar-gutter:stable}
.app-shell,.app-shell.is-custom{width:100%;max-width:1920px;margin:0 auto;padding:24px 28px;gap:18px}
.topbar{display:grid;grid-template-columns:max-content minmax(0,1fr) max-content;gap:26px;min-height:76px;flex:0 0 auto;align-items:center;padding-bottom:18px;border-color:var(--border)}
.brand-block{min-width:0}.topbar h1{font-size:clamp(20px,1.7vw,25px);margin:0;white-space:nowrap}
.topbar .source-tabs-row{min-width:0;margin:0}.source-tabs-shell{display:flex;align-items:center}.source-tabs{flex-shrink:0}
.topbar-actions{margin:0;gap:10px;flex-wrap:nowrap}.theme-toggle{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;min-height:34px;padding:6px 11px}.theme-toggle i{font-size:18px}
.panel,.modal-card{border-color:var(--border)}
.panel-heading>.muted{max-width:100%;overflow-wrap:anywhere}.plan-card>div{color:var(--text)}.plan-card.active{background:var(--accent)}
.plan-card small{color:var(--muted)}.plan-card p{margin:9px 0}.plan-card>span{font-size:11px;line-height:1.7;color:var(--muted)}
.style-preview{height:auto!important;padding:0;background:none!important;aspect-ratio:8/5}.style-preview::after{display:none}.style-preview img{display:block;width:100%;height:100%;object-fit:contain}
.style-card h3{font-size:12px;margin:8px 5px 4px;color:var(--text)}.style-card p{display:block;font-size:10px;line-height:1.5;margin:0 5px 6px;color:var(--muted)}
.is-custom .settings-stack>div:has(#styleGrid){display:block}.is-custom #styleGrid{display:grid}.is-custom .compact-style-select{display:none}.is-custom .style-example{display:none}
.style-note{font-size:11px;line-height:1.6;color:var(--muted);margin:8px 0 0}
:root{--on-primary:#f5f3ed;--editor:#f7f5ef;--preview:#e8ebe3}
:root[data-theme=dark]{color-scheme:dark;--bg:#17231f;--surface:#202e27;--surface-2:#26372d;--text:#e3e8dc;--muted:#afbdad;--text-muted:#afbdad;--border:#3d5144;--border-light:#34463b;--primary:#a0c6ab;--accent:#304b3b;--strong:#e2eddd;--focus:#b5d5ad;--on-primary:#17281d;--editor:#1c2b23;--preview:#24382b;--warning-bg:#403a24;--warning-text:#e3d3a2;--pastel-pink:#3b2e35;--pastel-blue:#293b44;--pastel-yellow:#423f2a;--pastel-green:#2d4536;--shadow-flat-lg:0 16px 50px #0005}
.primary-button{color:var(--on-primary)}
input,select,textarea,#pageEditor input,#pageEditor textarea{background:var(--editor);color:var(--text)}
.content-policy-row{background:var(--surface-2);border-color:var(--border)}.content-policy-row select,#pageTextMode{background:var(--editor);color:var(--text);border-color:var(--border)}
.draft-actions span{color:var(--muted)}.page-list-item[aria-current=true]{background:var(--accent)}.page-number{color:var(--muted)}
.content-draft-dialog,.bulk-dialog{background:var(--surface);color:var(--text);border-color:var(--border)}.content-draft-dialog textarea,.content-draft-dialog select,.custom-module-body input,.custom-module-body textarea{background:var(--editor);border-color:var(--border);color:var(--text)}.content-draft-dialog fieldset{border-color:var(--border)}
.topic-shortcuts button{background:var(--accent);border-color:var(--border);color:var(--strong)}.list-toolbar .text-button{color:var(--primary)}
:root[data-theme=dark] .item-row{background:var(--surface);border-color:var(--border)}:root[data-theme=dark] .item-row:has(input:checked){background:var(--accent);border-color:var(--primary)}
:root[data-theme=dark] .ratio-button,:root[data-theme=dark] .resolution-button{background:var(--surface);color:var(--text)}:root[data-theme=dark] .ratio-button.active,:root[data-theme=dark] .resolution-button.active{background:var(--accent);border-color:var(--primary);color:var(--text)}
:root[data-theme=dark] .preview-empty,:root[data-theme=dark] .preview-card,:root[data-theme=dark] .history-card{background:var(--surface-2);border-color:var(--border);color:var(--text)}
:root[data-theme=dark] #userQuota{color:var(--primary)!important}:root[data-theme=dark] .outline-landscape{opacity:.65;mix-blend-mode:screen}:root[data-theme=dark] .mobile-nav-bar{border-color:var(--border);background:var(--surface)}
:root[data-theme=dark] ::-webkit-scrollbar-thumb{background:#516454}:root[data-theme=dark] input::placeholder,:root[data-theme=dark] textarea::placeholder{color:#9baa9c}
.app-shell[data-mobile-tab] .topbar .source-tabs-row{display:block!important}
@media(max-width:1100px){.topbar{grid-template-columns:minmax(0,1fr) auto;gap:14px}.topbar .source-tabs-row{grid-column:1/-1;grid-row:2;order:initial}.topbar-actions{margin:0}.source-tabs{width:auto;gap:10px}.source-tab{padding:0 18px}.topbar h1{font-size:21px}}
@media(max-width:760px){.app-shell,.app-shell.is-custom{padding:16px 14px 88px;gap:18px}.topbar{grid-template-columns:minmax(0,1fr) auto;min-height:110px;padding-bottom:14px}.topbar h1{font-size:18px}.brand-mark{font-size:25px;margin-right:6px}.source-tabs{width:100%}.source-tab{flex:1}.topbar-actions{gap:5px}.theme-toggle{padding:6px 8px}.theme-toggle span{display:none}.user-profile-widget #userInfo{gap:4px!important}.user-name-span{max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-actions .compact{padding-left:6px!important;padding-right:6px!important}.is-custom .settings-stack>div:has(#styleGrid){display:block}.style-preview{height:auto!important}.content-policy-row label{display:block;max-width:100%}}
@media(prefers-reduced-motion:no-preference){body,.panel,.source-tab,button,input,select,textarea{transition:background-color .15s,color .15s,border-color .15s}}