/* App shell (docs/SHELL-SPEC.md): the icon rail on every signed-in page, the app layout's list · work · stage
   columns, the focused, studio and bare layouts, drawer, modal, toasts and every responsive rule.
   Foundation-owned: areas style what is inside their columns in their own page stylesheet. */

/* ---------- Sizes ---------- */
:root{--iconrail-w:64px;--list-w:256px;--work-w:clamp(400px,34vw,500px);--sheet-w:min(560px,calc(100vw - var(--iconrail-w)))}

/* ---------- App grid (layouts/app.html): icon rail | list | work | stage ---------- */
body.shell{--topbar-h:0px}
body.shell,body.focused{height:100dvh;overflow:hidden;background:var(--bg)}
.app{display:grid;grid-template-columns:var(--iconrail-w) var(--list-w) var(--work-w) minmax(0,1fr);height:100dvh;min-height:0;position:relative}
.app > *{min-width:0;min-height:0}
body.wide .app{grid-template-columns:var(--iconrail-w) var(--list-w) minmax(0,1fr)}
body.noproj .app,body.focused .app{grid-template-columns:var(--iconrail-w) minmax(0,1fr)}
/* position:relative keeps absolutely positioned descendants (sr-only labels, overlays) inside their own
   scrolling column; without it they resolve against .app and make the whole page scroll. */
.center{position:relative;padding:20px 24px 40px;min-width:0;min-height:0;overflow-y:auto;background:var(--surface);border-right:1px solid var(--line)}
body.wide .center,body.noproj .center{border-right:0}
.center > .page{padding-top:8px}

/* ---------- Icon rail (every layout) ---------- */
.iconrail{display:flex;flex-direction:column;align-items:center;padding:12px 0 10px;gap:4px;border-right:1px solid var(--line);background:var(--surface);position:relative;z-index:46;min-height:0}
.iconrail .logo{display:block;width:34px;height:34px;margin-bottom:10px;border-radius:9px;flex:none}
.iconrail .logo img{width:34px;height:34px}
.iconrail .area{display:flex;flex-direction:column;align-items:center;gap:4px;width:52px;padding:8px 0 6px;border:0;border-radius:var(--radius-box);background:transparent;color:var(--muted);font:500 10.5px var(--ui);text-align:center;text-decoration:none;cursor:pointer;flex:none}
.iconrail .area:hover,.iconrail .railtool[open] > .area{background:var(--panel);color:var(--text)}
.iconrail .area.active,.iconrail .area[aria-current="page"]{color:var(--lime);background:var(--lime-soft)}
.iconrail .rail-toggle{display:none}
.iconrail .railtool{flex:none}
.iconrail .railtool > summary{list-style:none}
.iconrail .railtool > summary::-webkit-details-marker{display:none}
.iconrail .railmenu{top:-6px;left:calc(100% + 10px);width:300px;max-width:min(300px,calc(100vw - var(--iconrail-w) - 16px))}
.iconrail .spacer{flex:1}
.iconrail .jobs-slot{width:52px;flex:none}
.iconrail .jobs{position:relative;flex-direction:column;gap:5px;height:auto;width:52px;padding:8px 0 6px;border:0;border-radius:var(--radius-box);font-size:10.5px;color:var(--muted)}
.iconrail .jobs .pulse{width:8px;height:8px;margin:4px 0 0}
.iconrail .jobs .lbl{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.iconrail .jobs::after{content:"Jobs"}
.iconrail .jobs.active::after{content:"Running"}
.iconrail .jobs.queued::after{content:"Queued"}
.iconrail .jobs.attention::after{content:"Attention";color:var(--fail)}
.iconrail .credits{font:600 11px var(--mono);color:var(--lime);border:1px solid var(--lime-line);background:var(--lime-soft);border-radius:var(--radius-xs);padding:2px 6px;margin:6px 0 4px;white-space:nowrap}
.iconrail .dev-chip{margin:2px 0 6px}
.iconrail .account{margin-top:6px}
.iconrail .account .menu{top:auto;bottom:0;left:calc(100% + 8px);right:auto}

/* ---------- Sidebar rail + expanded panel (ui/shell/_iconrail.html, rail-panel.js; design 03) ---------- */
.iconrail[data-sidebar]{gap:2px;white-space:nowrap}
.iconrail[data-sidebar] .ph,.railpanel .ph{width:16px;height:16px;flex:none;fill:currentColor}
.iconrail[data-sidebar] .area > .ph{width:19px;height:19px}
.iconrail[data-sidebar] .area{margin-top:2px}
.iconrail[data-sidebar] .area.active,.iconrail[data-sidebar] .area[aria-current="page"]{color:var(--lime);background:var(--lime-soft)}
.iconrail[data-sidebar] :is(a,button,[tabindex]):focus-visible{outline:2px solid var(--lime);outline-offset:1px}
.iconrail[data-sidebar] .rail-tg{display:flex;align-items:center;justify-content:center;gap:3px;width:52px;margin:8px 0 4px;padding:6px 0 4px;border:0;border-top:1px solid var(--line);border-radius:0;background:transparent;font:600 9.5px var(--ui);letter-spacing:.06em;text-transform:uppercase;color:var(--text-2);cursor:pointer;flex:none}
.iconrail[data-sidebar] .rail-tg .ph{width:11px;height:11px;transition:transform var(--t-med) var(--ease)}
.iconrail[data-sidebar] .rail-tg:hover,.iconrail[data-sidebar] .rail-tg.on{color:var(--text)}
.iconrail[data-sidebar] .rail-tg[aria-expanded="false"] .ph,.railpanel .tgrp[aria-expanded="false"] .cv .ph{transform:rotate(-90deg)}
.iconrail[data-sidebar] .rail-tiles{display:flex;flex-direction:column;align-items:center;gap:2px;flex:none}
.iconrail[data-sidebar] .rail-tiles[hidden],.railpanel .sub[hidden]{display:none}
.iconrail[data-sidebar] .rt{position:relative;width:44px;height:44px;border-radius:11px;display:grid;place-items:center;border:1px solid transparent;flex:none;text-decoration:none}
.iconrail[data-sidebar] .rt .tile{width:32px;height:32px;border-radius:8px}
.iconrail[data-sidebar] .rt .tile .ph{width:17px;height:17px}
.iconrail[data-sidebar] a.rt:hover{background:var(--raised-2);border-color:var(--line-2)}
.iconrail[data-sidebar] .rt.sel{border-color:var(--lime);background:var(--lime-soft)}
.iconrail[data-sidebar] .rt.sel::before{content:"";position:absolute;left:-10px;top:12px;bottom:12px;width:3px;border-radius:2px;background:var(--lime)}
.iconrail[data-sidebar] .rt .dot{position:absolute;right:3px;top:3px;width:7px;height:7px;border-radius:50%;background:var(--violet);box-shadow:0 0 0 2px var(--surface)}
.iconrail[data-sidebar] .rail-more{display:flex;flex-direction:column;align-items:center;gap:2px;padding-top:6px;border-top:1px solid var(--line);width:52px;flex:none}
.iconrail[data-sidebar] .area.sm{width:40px;height:34px;padding:0;justify-content:center}
.iconrail[data-sidebar] .area.sm .i{width:17px;height:17px}
.iconrail[data-sidebar] .rail-xp{width:36px;height:30px;margin:6px 0 2px;border-radius:8px;display:grid;place-items:center;color:var(--text-2);border:1px solid var(--line-2);background:transparent;cursor:pointer;flex:none}
.iconrail[data-sidebar] .rail-xp:hover,.iconrail[data-sidebar] .rail-xp[aria-expanded="true"]{color:var(--text);background:var(--panel)}
.iconrail[data-sidebar] .rail-xp .ph{width:14px;height:14px}
/* tooltips on the rail icons (hover and keyboard focus) */
.iconrail[data-sidebar] [data-tip]{position:relative}
.iconrail[data-sidebar] [data-tip]:is(:hover,:focus-visible)::after{content:attr(data-tip);position:absolute;left:calc(100% + 10px);top:50%;transform:translateY(-50%);z-index:70;display:flex;align-items:center;height:28px;padding:0 10px;border-radius:7px;background:var(--raised-2);border:1px solid var(--line-2);box-shadow:var(--shadow-menu);font:600 12px var(--ui);letter-spacing:0;text-transform:none;color:var(--text);white-space:nowrap;pointer-events:none}
.iconrail[data-sidebar] .area[data-tip]:not(.sm):is(:hover,:focus-visible)::after{display:none}
body.railpanel-open .iconrail[data-sidebar] [data-tip]::after{display:none}
/* colour tiles, rail and panel */
:is(.iconrail[data-sidebar],.railpanel) .tile{display:grid;place-items:center;border-radius:6px;background:var(--c,#555);color:#0C0E14;flex:none}
:is(.iconrail[data-sidebar],.railpanel) .tile .ph{color:#0C0E14}
.tc-asset-engine{--c:#C7FF4D}
.tc-texture-studio{--c:#FF8A4C}
.tc-sprite-editor{--c:#FF5FA2}
.tc-audio-workbench{--c:#38BDF8}
.tc-rig-studio{--c:#3B82F6}
.tc-mocap-studio{--c:#2DD4BF}
.tc-particle-forge{--c:#FBBF24}
.tc-shanty{--c:#A78BFA}
/* the expanded panel floats over a dimmed stage */
.railscrim{position:fixed;top:0;right:0;bottom:0;left:var(--iconrail-w);z-index:50;background:rgba(8,10,15,.55)}
.railscrim[hidden],.railpanel[hidden]{display:none}
.railpanel{position:fixed;z-index:60;left:calc(var(--iconrail-w) + 8px);top:8px;width:272px;max-width:calc(100vw - var(--iconrail-w) - 16px);max-height:calc(100dvh - 16px);display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line-2);border-radius:12px;overflow:hidden;box-shadow:16px 12px 40px rgba(0,0,0,.5);white-space:nowrap}
.railpanel :is(a,button):focus-visible{outline:2px solid var(--lime);outline-offset:-2px}
.railpanel .rp-hd{display:flex;align-items:center;gap:9px;padding:12px 10px 10px 14px;border-bottom:1px solid var(--line);flex:none}
.railpanel .rp-hd img{width:26px;height:26px;flex:none}
.railpanel .pj{display:flex;flex-direction:column;min-width:0;flex:1;text-decoration:none}
.railpanel .pj b{font:600 13px var(--head);color:var(--text);overflow:hidden;text-overflow:ellipsis}
.railpanel .pj small{font-size:11px;color:var(--muted)}
.railpanel .rp-ib{width:28px;height:28px;border-radius:7px;display:grid;place-items:center;color:var(--text-2);border:1px solid var(--line-2);background:transparent;cursor:pointer;flex:none}
.railpanel .rp-ib:hover{color:var(--text);background:var(--panel)}
.railpanel .rp-ib .ph{width:15px;height:15px}
.railpanel .rp-body{flex:1;min-height:0;overflow-y:auto;padding:10px 8px;display:flex;flex-direction:column}
.railpanel .it{position:relative;display:flex;align-items:center;gap:9px;width:100%;height:30px;padding:0 8px;border:0;border-radius:7px;background:transparent;color:var(--text-2);font:500 12.5px var(--ui);text-align:left;text-decoration:none;cursor:pointer;flex:none}
.railpanel .it > .ph,.railpanel .it > .i{color:var(--muted)}
.railpanel a.it:hover,.railpanel button.it:hover{background:var(--raised-2);color:var(--text)}
.railpanel .it.sel{background:var(--lime-soft);color:var(--text);box-shadow:inset 0 0 0 1px var(--lime-line)}
.railpanel .it.sel > .ph,.railpanel .it.sel > .i{color:var(--lime)}
.railpanel .it .cnt{margin-left:auto;font:500 10.5px var(--mono);color:var(--muted)}
.railpanel .it.tgrp{color:var(--text);font-weight:600}
.railpanel .it.tgrp .cv{margin-left:6px;width:20px;height:20px;border-radius:5px;display:grid;place-items:center;color:var(--text-2);border:1px solid var(--line-2)}
.railpanel .it.tgrp .cv .ph{width:11px;height:11px;transition:transform var(--t-med) var(--ease)}
.railpanel .sub{position:relative;margin:2px 0 0 16px;padding-left:8px;display:flex;flex-direction:column;gap:1px}
.railpanel .sub::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:1px;background:var(--line-2)}
.railpanel .sub .it{height:28px;gap:8px;padding:0 7px}
.railpanel .sub .it.sel::before{content:"";position:absolute;left:-9px;top:6px;bottom:6px;width:3px;border-radius:2px;background:var(--lime)}
.railpanel .tile{width:20px;height:20px;border-radius:5px}
.railpanel .tile .ph{width:12px;height:12px}
.railpanel .kbd{margin-left:auto;font:500 10px var(--mono);color:var(--text);border:1px solid var(--text-2);border-radius:4px;padding:0 4px;line-height:15px;min-width:18px;text-align:center;visibility:hidden}
.railpanel .it:is(:hover,:focus-visible) .kbd{visibility:visible}
.railpanel .open{margin-left:auto;font:600 9.5px var(--ui);color:var(--violet-text,var(--text-2));border:1px solid var(--line-2);border-radius:8px;padding:0 6px;line-height:16px}
.railpanel .open + .kbd{margin-left:6px}
.railpanel .it.rc{color:var(--muted);font-size:12px}
.railpanel .it.rc span:last-child{overflow:hidden;text-overflow:ellipsis}
.railpanel .sep{height:1px;background:var(--line);margin:8px 4px;flex:none}
.railpanel .sp{flex:1;min-height:6px}
.railpanel .lbl{font:600 9.5px var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:6px 8px 4px}
.railpanel .it.sm{height:28px;font-size:12px}
/* shorter screens: tighter rail so everything still fits */
@media (max-height:860px){
  .iconrail[data-sidebar]{padding-top:8px}
  .iconrail[data-sidebar] .logo{margin-bottom:4px}
  .iconrail[data-sidebar] .area:not(.sm){padding:6px 0 4px}
  .iconrail[data-sidebar] .rail-tg{margin:4px 0 2px}
  .iconrail[data-sidebar] .rt{width:38px;height:38px;border-radius:10px}
  .iconrail[data-sidebar] .rt .tile{width:28px;height:28px;border-radius:7px}
  .iconrail[data-sidebar] .rt .tile .ph{width:15px;height:15px}
  .iconrail[data-sidebar] .rt.sel::before{left:-13px;top:10px;bottom:10px}
  .iconrail[data-sidebar] .area.sm{height:30px}
}
@media (max-height:740px){
  .iconrail[data-sidebar] .area:not(.sm){font-size:0;gap:0;padding:7px 0}
  .iconrail[data-sidebar] .area[data-tip]:not(.sm):is(:hover,:focus-visible)::after{display:flex}
  .iconrail[data-sidebar] .rt{width:34px;height:34px}
  .iconrail[data-sidebar] .rt .tile{width:26px;height:26px}
  .iconrail[data-sidebar] .rail-more{flex-direction:row;justify-content:center;width:56px}
  .iconrail[data-sidebar] .area.sm{width:26px}
}

/* ---------- Shared shell pieces ---------- */
.project-switch{display:flex;align-items:center;gap:8px;height:32px;padding:0 10px 0 8px;border:1px solid var(--line);background:var(--panel);border-radius:var(--radius-ctl);font-weight:500;color:var(--text);max-width:240px;min-width:0}
.project-switch .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.project-switch .cnt{margin-left:auto;font:500 11px var(--mono);color:var(--muted);white-space:nowrap}
.project-switch .i{width:12px;height:12px;opacity:.6;flex:none}
.pdot{width:18px;height:18px;border-radius:5px;background:linear-gradient(135deg,#C9A272,#7A4A2A);display:grid;place-items:center;font:700 9.5px var(--head);color:#1b1208;flex:none;letter-spacing:0}
.pdot.lg{width:28px;height:28px;border-radius:7px;font-size:11.5px}
.search{flex:1;display:flex;align-items:center;gap:9px;height:34px;padding:0 12px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-ctl);color:var(--muted);position:relative;min-width:0}
.search:focus-within{border-color:var(--lime-line);box-shadow:0 0 0 3px var(--lime-soft)}
.search input{flex:1;min-width:0;height:100%;background:transparent;border:0;outline:none;color:var(--text)}
.search input::placeholder{color:var(--muted)}
.search input::-webkit-search-cancel-button{display:none}
.search kbd{margin-left:auto;font:500 11px var(--mono);color:var(--muted);border:1px solid var(--line-2);border-radius:4px;padding:1px 5px}
.search > .i{flex:none}
.search-pop{position:absolute;top:calc(100% + 6px);left:0;right:0;z-index:47;border-radius:var(--radius-pop);background:var(--raised);border:1px solid var(--line-2);box-shadow:var(--shadow-menu);padding:6px;max-height:min(60vh,520px);overflow:auto;color:var(--text)}
.search-pop:empty,.search-pop.closed{display:none}
.jobs-slot{display:flex;flex:none}
.jobs{display:flex;align-items:center;gap:7px;height:32px;padding:0 10px;border-radius:var(--radius-ctl);color:var(--text-2);border:1px solid var(--line);background:transparent;white-space:nowrap;font-weight:500}
.jobs:hover{background:var(--raised);color:var(--text)}
.jobs .pulse{width:7px;height:7px;border-radius:50%;background:var(--violet);box-shadow:0 0 0 3px var(--violet-soft);flex:none}
.jobs.active .pulse{animation:xw-pulse 1.6s ease-in-out infinite}
.jobs.idle .pulse{background:var(--pass);box-shadow:0 0 0 3px var(--pass-soft)}
.jobs.attention .pulse{background:var(--fail);box-shadow:0 0 0 3px var(--fail-soft)}
.jobs.queued .pulse{background:var(--muted);box-shadow:0 0 0 3px var(--raised-2)}
.reconnecting .jobs .lbl{visibility:hidden;position:relative}
.reconnecting .jobs .lbl::after{content:"Reconnecting…";visibility:visible;position:absolute;left:0;top:0}
.dev-chip{font:600 10px var(--mono);letter-spacing:.06em;color:var(--warn);border:1px solid var(--warn-line);background:var(--warn-soft);border-radius:var(--radius-xs);padding:2px 6px;flex:none}
.avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,#8B5CF6,#4c2fa8);display:grid;place-items:center;font:600 12px var(--head);color:#fff;flex:none}
.account-menu .who{padding:8px 8px 6px}
.account-menu .who b{display:block;font-weight:600}
.account-menu .who span{color:var(--muted);font-size:12px}
.account-menu .dev-line{padding:6px 8px;font:500 10.5px var(--mono);color:var(--muted)}

/* ---------- List column (ui/shell/_list.html; areas may bring their own list) ---------- */
.listcol{display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--line);background:var(--surface)}
.listcol .lhd{display:flex;align-items:baseline;gap:8px;padding:14px 14px 8px;min-width:0}
.listcol .lhd h2{font-size:15px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.listcol .lhd .sub{font:500 11px var(--mono);color:var(--muted);white-space:nowrap}
.listcol .new-menu{display:block;margin:2px 12px 8px}
.listcol .new-menu > summary{display:flex;width:100%;justify-content:center}
.listcol .new-menu .menu{left:0;right:auto;width:300px}
.listcol .search{flex:none;margin:0 12px 8px;height:32px;padding:0 10px}
.listcol .search-pop{right:auto;width:min(440px,calc(100vw - var(--iconrail-w) - 24px))}
.listcol .lnav{display:flex;flex-direction:column;gap:2px;padding:2px 10px 12px;overflow-y:auto;min-height:0;flex:1 1 auto}
.listcol .lfoot{margin-top:auto;padding:10px 12px;border-top:1px solid var(--line)}
.listcol .lfoot .project-menu{display:block}
.listcol .lfoot .project-switch{width:100%;max-width:none;height:38px}
.listcol .lfoot .menu{left:0;right:auto;min-width:100%}
.listcol h6{font:600 10.5px var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:12px 10px 6px;margin:0}

/* The packs nav inside the default list column (#rail is re-fetched on railChanged). */
.rail{display:flex;flex-direction:column;gap:2px;padding:2px 10px 12px;overflow-y:auto;min-height:0;flex:1 1 auto}
.lookbook-btn{display:flex;flex-wrap:wrap;align-items:center;gap:6px 9px;padding:9px 10px;border:1px solid var(--line-2);background:var(--panel);border-radius:var(--radius-box);font-weight:600;margin-bottom:12px;color:var(--text);min-width:0}
.lookbook-btn:hover{border-color:var(--muted)}
.lookbook-btn.active{border-color:var(--lime-line);box-shadow:inset 0 0 0 1px var(--lime-line)}
.lookbook-btn .pill{max-width:100%;overflow:hidden;text-overflow:ellipsis}
.rail h6{font:600 10.5px var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:12px 10px 6px;margin:0}
.rail-nav{display:flex;flex-direction:column;gap:2px}
.rail-nav a{display:flex;align-items:center;gap:9px;padding:7px 10px;border-radius:var(--radius-sm);color:var(--text-2);text-decoration:none;min-width:0}
.rail-nav a:hover{background:var(--panel);color:var(--text)}
.rail-nav a .lbl{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.rail-nav a .n{margin-left:auto;font:500 11px var(--mono);color:var(--muted)}
.rail-nav a .n.warn{color:var(--warn)}
.rail-nav a.active,.rail-nav a[aria-current="page"]{background:var(--raised);color:var(--text);box-shadow:inset 0 0 0 1px var(--line-2)}
.rail-nav a.active .n{color:var(--text-2)}
.rail-nav a .i{width:14px;height:14px;opacity:.7}
.rail-nav a.add{color:var(--muted)}
/* Drag-to-move (drag-move.js): the hovered pack link says what a drop does in place of its count; the targets that
   can't take a drop dim with the reason; while a drag is on, the children stop catching dragover/dragleave. */
body.xw-dragging .rail-nav a *{pointer-events:none}
body.xw-dragging .rail-nav a[data-drop-pack],body.xw-dragging .rail-nav a[data-drop-new]{box-shadow:inset 0 0 0 1px var(--lime-line)}
.rail-nav a.drop-ok{background:var(--lime-soft);color:var(--text);box-shadow:inset 0 0 0 2px var(--lime)}
.rail-nav a.drop-no{opacity:.55;cursor:not-allowed}
.rail-nav a.drop-ok .n,.rail-nav a.drop-no .n{display:none}
.rail-nav a[data-hint]::after{content:attr(data-hint);margin-left:auto;font:500 11px var(--mono);color:var(--lime);white-space:nowrap}
.rail-nav a.drop-no[data-hint]::after{color:var(--muted)}
/* Inline rename (rail-rename.js): the link gives way to a form of the same box; the field fills the label's width. */
.rail-nav .rail-rename{display:flex;align-items:center;gap:9px;padding:4px 10px;border-radius:var(--radius-sm);background:var(--raised);color:var(--text);box-shadow:inset 0 0 0 1px var(--lime);min-width:0}
.rail-nav .rail-rename input{flex:1 1 auto;min-width:0;width:100%;padding:3px 0;margin:0;border:0;outline:0;background:transparent;font:inherit;color:inherit}
.rail-nav .rail-rename input:disabled{opacity:.6}
.rail-nav .rail-rename .n{margin-left:auto;font:500 11px var(--mono);color:var(--text-2)}

/* ---------- Stage (#inspector / #side, the right column) ---------- */
.inspector,.side{position:relative;background:var(--bg);padding:16px;display:flex;flex-direction:column;gap:14px;overflow-y:auto;min-width:0;min-height:0}
.inspector > .colbar,.side > .colbar,.inspector > .stageft,.side > .stageft{flex:none}
.sheet-close{display:none}
.inspector .preview{height:clamp(220px,38vh,420px);border-radius:var(--radius);border:1px solid var(--line);background:radial-gradient(110% 100% at 50% 20%,#3A2E24 0%,#15120F 80%);position:relative;overflow:hidden;flex:none}
.inspector .preview img{width:100%;height:100%;object-fit:contain}
.preview .tools{position:absolute;bottom:8px;right:8px;display:flex;gap:4px;z-index:1}
.preview .tools a,.preview .tools button{width:26px;height:26px;border-radius:var(--radius-seg);background:rgba(12,14,20,.75);border:1px solid var(--overlay-line);display:grid;place-items:center;color:var(--text)}
.preview .tools .i{width:13px;height:13px}
.preview .lbl{position:absolute;top:8px;left:8px}
.ins-title{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;min-width:0}
.ins-title h2{font-size:20px;line-height:1.15;overflow-wrap:anywhere}
.ins-title .tv{font:500 11.5px var(--mono);color:var(--muted);margin-top:3px}
.actions{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.actions .btn{justify-content:flex-start;height:34px;font-size:12.5px;min-width:0}

/* ---------- Column frame: work and stage columns share it (docs/SHELL-SPEC.md §3) ---------- */
.center:has(> .colbar),.inspector:has(> .colbar),.side:has(> .colbar){padding:0;gap:0}
.colbar{position:sticky;top:0;z-index:5;display:flex;flex-wrap:wrap;align-items:center;gap:8px;row-gap:8px;min-height:52px;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--surface);min-width:0}
.colbar h1,.colbar h2{font:600 15px/1.25 var(--head);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;margin:0}
.colbar .crumb,.colbar .sub{font:500 11.5px var(--mono);color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.colbar .spacer{flex:1}
.colbody{padding:16px 20px 32px;min-width:0}
.stageview{position:relative;flex:1 1 auto;min-height:320px;display:grid;place-items:center;background:var(--viewer-bg);overflow:hidden}
.stageview .frame{height:min(74%,560px);max-width:82%;aspect-ratio:1/1;border-radius:18px;overflow:hidden;background:#1a1d27;box-shadow:0 40px 80px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.06);display:grid;place-items:center}
.stageview .frame.wide{aspect-ratio:16/9;height:auto;width:min(86%,980px);max-width:none}
.stageview .frame > img,.stageview .frame > model-viewer{width:100%;height:100%;object-fit:contain}
.stageview .ov{position:absolute;display:flex;gap:6px;align-items:center;flex-wrap:wrap;z-index:2}
.stageview .ov.tl{left:16px;top:14px}
.stageview .ov.tr{right:16px;top:14px}
.stageview .ov.bl{left:16px;bottom:14px}
.stageview .ov.br{right:16px;bottom:14px;font:500 11.5px var(--mono);color:var(--muted)}
.stageft{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;padding:12px 16px;border-top:1px solid var(--line);background:var(--surface);min-width:0}
.stageft .spacer{flex:1}
.stageempty{flex:1;display:grid;place-items:center;align-content:center;gap:8px;padding:32px;color:var(--muted);text-align:center;background:var(--viewer-bg)}

/* ---------- Drawer, scrim, modal, toasts ---------- */
.drawer{position:fixed;z-index:50;top:0;right:0;bottom:0;width:min(400px,100vw);background:var(--surface);border-left:1px solid var(--line-2);box-shadow:var(--shadow-menu);padding:16px;overflow-y:auto;transform:translateX(100%);transition:transform var(--t-med) var(--ease);visibility:hidden}
.drawer.open{transform:none;visibility:visible}
.drawer:empty{display:none}
.scrim{position:fixed;inset:0;z-index:35;background:var(--scrim);backdrop-filter:blur(2px)}
#toasts{position:fixed;left:calc(var(--iconrail-w) + 16px);bottom:24px;z-index:70;display:flex;flex-direction:column;gap:8px;align-items:flex-start;pointer-events:none}

/* ---------- Focused layout (editors, wizard, Lookbook extract): icon rail | one column ---------- */
.focused-col{display:flex;flex-direction:column;min-width:0;min-height:0;overflow-y:auto;background:var(--surface)}
.lbtop{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:12px;flex:none;height:var(--topbar-h);padding:0 20px;border-bottom:1px solid var(--line);background:var(--surface);min-width:0}
.lbtop .back{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);white-space:nowrap;min-width:0;overflow:hidden;text-overflow:ellipsis}
.lbtop .back:hover{color:var(--text)}
.lbtop .state{font:500 11.5px var(--mono);color:var(--muted);white-space:nowrap}
.lbtop .r{margin-left:auto;display:flex;align-items:center;gap:8px}
.focused-main{padding:0 24px 56px;min-width:0;flex:1 0 auto}

/* ---------- Bare layout (sign-in, errors) ---------- */
.bare{min-height:100dvh;display:grid;place-items:center;padding:32px 16px}
.bare-panel{width:min(440px,100%);display:flex;flex-direction:column;gap:18px}
.bare-panel.wide{width:min(560px,100%)}
.lockup{display:flex;align-items:center;gap:10px;font:600 22px/1 var(--head);letter-spacing:-.02em}
.lockup img{width:34px;height:34px}
.bare-foot{font-size:11.5px;color:var(--muted);text-align:center}

/* ---------- Responsive (docs/SHELL-SPEC.md §5) ---------- */
@media (max-width:1279px){
  .app{grid-template-columns:var(--iconrail-w) var(--work-w) minmax(0,1fr)}
  body.wide .app{grid-template-columns:var(--iconrail-w) minmax(0,1fr)}
  .iconrail .rail-toggle{display:flex}
  .listcol{position:fixed;z-index:45;top:0;bottom:0;left:var(--iconrail-w);width:min(280px,calc(100vw - var(--iconrail-w)));transform:translateX(-100%);visibility:hidden;transition:transform var(--t-med) var(--ease),visibility var(--t-med);box-shadow:var(--shadow-menu)}
  body.rail-open .listcol{transform:none;visibility:visible}
}
@media (max-width:979px){
  .app,body.wide .app{grid-template-columns:var(--iconrail-w) minmax(0,1fr)}
  .center{border-right:0;padding:16px var(--gutter) 40px}
  .app > .inspector,.app > .side{position:fixed;z-index:44;top:0;right:0;bottom:0;width:var(--sheet-w);border-left:1px solid var(--line-2);box-shadow:var(--shadow-menu);transform:translateX(100%);visibility:hidden;transition:transform var(--t-med) var(--ease),visibility var(--t-med)}
  body.sheet-open .app > .inspector,body.sheet-open .app > .side{transform:none;visibility:visible}
  .sheet-close{display:inline-flex;align-self:flex-start}
}
@media (max-width:767px){
  .focused-main{padding:0 var(--gutter) 40px}
  .lbtop{padding:0 12px;gap:8px}
  dialog.dlg{width:100vw!important;max-width:100vw;height:100dvh;max-height:100dvh;border-radius:0;margin:0}
  .set-head h1{font-size:24px}
  #toasts{left:calc(var(--iconrail-w) + 8px);right:8px;bottom:12px}
  .drawer{width:calc(100vw - var(--iconrail-w))}
}
@media (pointer:coarse){
  .project-switch,.avatar,.search{min-height:40px}
  .avatar{width:40px;height:40px}
  .iconrail .area,.iconrail .jobs{min-height:44px}
}

/* ---------- Studio layout (chat area, CHAT-SPEC §1): icon rail 64 · threads 256 · chat 500 · stage ---------- */
body.studio{--threads-w:256px;--chat-w:500px;--agent-w:372px;height:100dvh;overflow:hidden;background:var(--bg)}
body.studio .studio{display:grid;grid-template-columns:var(--iconrail-w) var(--threads-w) var(--chat-w) minmax(0,1fr);height:100dvh;min-height:0;position:relative}
body.studio .studio > *{min-width:0;min-height:0}
body.studio .threads{display:flex;flex-direction:column;border-right:1px solid var(--line);background:var(--surface)}
body.studio .chat{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr) auto;border-right:1px solid var(--line);background:var(--surface);padding:0}
body.studio .stage{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr) auto;background:var(--bg)}
body.studio .chat > *,body.studio .stage > *,body.studio .threads > *{min-width:0}
body.studio .agent-drawer{position:absolute;top:0;right:0;bottom:0;width:min(var(--agent-w),100vw);background:var(--surface);border-left:1px solid var(--line-2);box-shadow:var(--shadow-menu);display:flex;flex-direction:column;transform:translateX(100%);transition:transform var(--t-med) var(--ease);visibility:hidden;z-index:48}
body.studio .agent-drawer.open{transform:none;visibility:visible}
body.studio .agent-drawer:empty{display:none}
@media (max-width:1279px){
  body.studio .studio{grid-template-columns:var(--iconrail-w) var(--chat-w) minmax(0,1fr)}
  body.studio .threads{display:none}
}
@media (max-width:979px){
  body.studio .studio{grid-template-columns:var(--iconrail-w) minmax(0,1fr)}
  body.studio .stage{display:none}
  body.studio .chat{border-right:0}
}

/* ---------- Work | stage splitter (#stage-split, stage-split.js sets --work-w on <html>) ---------- */
.stage-split{position:absolute;z-index:6;top:0;bottom:0;left:calc(var(--iconrail-w) + var(--list-w) + var(--work-w) - 4px);width:8px;cursor:col-resize;touch-action:none;outline:0}
.stage-split::before{content:"";position:absolute;top:0;bottom:0;left:3px;width:2px;background:transparent;transition:background var(--t-fast,.12s) ease}
.stage-split::after{content:"";position:absolute;top:50%;left:1px;width:6px;height:36px;margin-top:-18px;border-radius:3px;background:var(--line-2);opacity:0;transition:opacity var(--t-fast,.12s) ease}
.stage-split:hover::before,.stage-split:focus-visible::before{background:var(--line-2)}
.stage-split:hover::after,.stage-split:focus-visible::after{opacity:1}
.stage-split.dragging::before{background:var(--lime)}
.stage-split.dragging::after{opacity:1;background:var(--lime)}
body.splitting{cursor:col-resize;user-select:none}
body.splitting iframe,body.splitting model-viewer,body.splitting canvas{pointer-events:none}
@media (max-width:1279px){.stage-split{left:calc(var(--iconrail-w) + var(--work-w) - 4px)}}
@media (max-width:979px){.stage-split{display:none}}