/* Desktop Studio: familiar three-column editor with collapsible side panels. */
@media (min-width:1025px){
  body.studio-active{overflow:hidden}
  body.studio-active .site-header{height:52px;min-height:52px;padding-inline:24px;background:#0d1113}
  body.studio-active .site-header .brand img{width:36px;height:36px}
  body.studio-active .site-header nav{gap:26px}
  body.studio-active .site-header nav a{font-size:13px}
  body.studio-active .studio-view{height:calc(100vh - 52px);min-height:0;overflow:hidden}

  .studio-topbar{height:48px;padding:0 12px 0 18px;gap:16px;background:#171c1f;border-bottom:1px solid #364044}
  .studio-topbar .project-heading{display:flex;align-items:center;min-width:220px;flex:1}
  .studio-topbar .eyebrow{display:none}
  .studio-topbar .title-input{width:min(360px,32vw);height:32px;padding:4px 8px;font-family:inherit;font-size:15px;font-weight:650;border:1px solid transparent;border-radius:4px}
  .studio-topbar .title-input:hover{border-color:#3d484c;background:#111719}
  .studio-topbar .title-input:focus{border-color:var(--sand);background:#111719}
  .studio-topbar .save-state{display:inline-flex;font-size:10px}
  .studio-topbar .toolbar{display:flex;align-items:center;gap:4px;min-width:0;overflow-x:auto;scrollbar-width:none}
  .studio-topbar .toolbar::-webkit-scrollbar{display:none}
  .studio-topbar .button,.studio-topbar .icon-button{height:30px;min-height:30px;padding-inline:10px;border-radius:4px;font-size:11px;white-space:nowrap}
  .studio-topbar .icon-button{width:30px;padding:0;font-size:16px}

  .studio-layout{height:calc(100% - 48px);min-height:0;display:grid;grid-template-columns:280px minmax(420px,1fr) 320px;grid-template-rows:minmax(0,1fr);overflow:hidden;background:#0a0e10;transition:grid-template-columns .18s ease}
  .studio-layout.palette-collapsed{grid-template-columns:0 minmax(420px,1fr) 320px}
  .studio-layout.inspector-collapsed{grid-template-columns:280px minmax(420px,1fr) 0}
  .studio-layout.palette-collapsed.inspector-collapsed{grid-template-columns:0 minmax(420px,1fr) 0}

  .studio-panel{position:relative;width:auto;height:100%;min-width:0;min-height:0;padding:0;display:grid;grid-template-rows:44px 38px minmax(0,1fr);overflow:hidden;background:#171d20;border-color:#384246;box-shadow:none}
  .palette-panel{grid-column:1;grid-row:1;border-right:1px solid #384246;border-left:0}
  .inspector-panel{grid-column:3;grid-row:1;max-height:none;overflow:hidden;border-left:1px solid #384246;border-right:0}
  .studio-layout.palette-collapsed .palette-panel,.studio-layout.inspector-collapsed .inspector-panel{display:none}

  .studio-panel>.panel-heading{height:44px;padding:0 12px;border-bottom:1px solid #384246;background:#1b2225}
  .studio-panel>.panel-heading h2{margin:0;color:#d9ddde;font-size:11px;letter-spacing:.1em}
  .studio-panel>.panel-heading .mobile-panel-close{display:inline-flex;width:26px;height:26px;min-height:26px;padding:0;border:0;border-radius:3px;background:transparent;color:#9fa9ab;font-size:16px}
  .studio-panel>.panel-heading .mobile-panel-close:hover{background:#30383b;color:#fff;transform:none}
  .palette-panel>.panel-heading .mobile-panel-close{font-size:0}
  .palette-panel>.panel-heading .mobile-panel-close::before{content:"‹";font-size:20px}
  .inspector-panel>.panel-heading .mobile-panel-close{font-size:0}
  .inspector-panel>.panel-heading .mobile-panel-close::before{content:"›";font-size:20px}

  .studio-panel>.panel-tabs{height:38px;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:0;border-bottom:1px solid #384246;border-radius:0;background:#151a1d}
  .studio-panel>.panel-tabs button{padding:0 5px;border-radius:0;border-right:1px solid #30383b;border-bottom:2px solid transparent;font-size:10px}
  .studio-panel>.panel-tabs button:last-child{border-right:0}
  .studio-panel>.panel-tabs button.active{background:#293134;border-bottom-color:var(--sand);color:#f1c75f}
  .studio-panel>.panel-page,.studio-panel>.inspector-page{height:auto;min-width:0;min-height:0;padding:13px;overflow-x:hidden;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#566165 transparent}

  .palette-panel>.panel-page[data-panel-page="pieces"]{display:block}
  .palette-panel>.panel-page[data-panel-page="pieces"]>label{margin:0 0 10px;gap:5px}
  .palette-panel label>span,.inspector-panel label>span{font-size:9px;letter-spacing:.06em}
  .palette-panel input,.palette-panel select,.inspector-panel input,.inspector-panel select,.inspector-panel textarea{min-height:34px;padding:7px 9px;border-radius:4px;font-size:11px}
  .palette-panel .piece-palette{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:14px 0 0;overflow:visible}
  .palette-panel .palette-group{display:contents}
  .palette-panel .palette-group h3{grid-column:1/-1;height:28px;margin:7px 0 0;padding:0 2px;display:flex;align-items:center;justify-content:space-between;border:0;border-bottom:1px solid #354044;color:#aab3b5;font-size:9px;white-space:normal}
  .palette-panel .palette-group h3 b{margin:0}
  .palette-panel .piece-button{width:100%;height:126px;min-height:126px;margin:0;padding:7px;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;border-radius:5px;background:#1d2528}
  .palette-panel .piece-button:hover{transform:none;background:#293235;border-color:#788589}
  .palette-panel .piece-preview{flex:0 0 87px;width:100%;height:87px;border-radius:4px}
  .palette-panel .piece-button>span:last-child{width:100%;min-width:0}
  .palette-panel .piece-button b{display:block;width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:9px}
  .palette-panel .piece-button small{display:none}
  .palette-panel>.panel-page[data-panel-page="floors"]{display:block}
  .palette-panel .floor-summary,.palette-panel .floor-stepper,.palette-panel .floor-list{margin-bottom:12px}
  .palette-panel>.panel-page[data-panel-page="plan"]{display:block}

  .inspector-panel>.inspector-page{display:block}
  .inspector-panel .empty-inspector{margin:0 0 16px;padding:22px 14px;border:1px solid #384246;border-radius:5px;background:#1b2225}
  .inspector-panel .empty-inspector .diamond-icon{font-size:32px}
  .inspector-panel .empty-inspector p{font-size:11px;line-height:1.5}
  .inspector-panel #piece-inspector{display:block}
  .inspector-panel #piece-inspector[hidden]{display:none}
  .inspector-panel .selection-title{margin:0 0 12px}
  .inspector-panel #piece-inspector>label,.inspector-panel #piece-inspector>.coordinate-grid{margin-bottom:10px}
  .inspector-panel #piece-inspector>.coordinate-grid,.inspector-panel #piece-inspector>.coordinate-grid.two{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
  .inspector-panel #piece-inspector>.coordinate-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
  .inspector-panel hr{margin:20px 0}
  .inspector-panel h3{margin:0 0 13px;font-size:10px}
  .inspector-panel label{margin:0 0 12px;gap:5px}
  .inspector-panel textarea{min-height:72px}
  .inspector-panel .checkbox{display:flex;align-items:center;gap:8px}
  .inspector-panel .checkbox input{width:15px;height:15px;min-height:15px}
  .inspector-panel .visibility-grid{display:grid;gap:6px}
  .inspector-panel .visibility-grid label{padding:8px;margin:0}
  .inspector-panel .metric-grid{grid-template-columns:repeat(2,1fr);margin-bottom:18px}
  .inspector-panel .schedule-list,.inspector-panel .validation-list{overflow:visible}

  .viewport-wrap{position:relative;grid-column:2;grid-row:1;width:auto;height:100%;min-width:0;min-height:0;border:0;background:#0b1012}
  .viewport-toolbar{z-index:12;top:10px;left:10px;right:10px;transform:none;width:auto;max-width:calc(100% - 20px);height:38px;padding:3px;gap:1px;overflow-x:auto;border-color:#3b4548;border-radius:5px;background:rgba(22,28,30,.96);scrollbar-width:none}
  .viewport-toolbar::-webkit-scrollbar{display:none}
  .viewport-toolbar .tool{flex:0 0 auto;height:30px;min-height:30px;padding:0 9px;gap:6px;border:0;border-radius:3px;background:transparent;color:#c7cdcf;font-size:11px}
  .viewport-toolbar .tool:hover{transform:none;background:#30383b;color:#fff}
  .viewport-toolbar .tool.active{background:#343d40;color:#f1c75f}
  .viewport-toolbar .tool.danger{color:#df8b82}
  .viewport-toolbar .tool kbd{display:inline-grid;min-width:20px;padding:1px 4px;place-items:center;font-size:9px}
  .viewport-toolbar [data-tool] kbd{display:none}
  .viewport-toolbar .panel-toggle{color:#f1c75f;font-weight:750}
  .studio-layout:not(.palette-collapsed) .palette-toggle{display:none}
  .studio-layout:not(.inspector-collapsed) .inspector-toggle{display:none}
  .studio-layout.palette-collapsed .palette-toggle{order:-1}
  .studio-layout.inspector-collapsed .inspector-toggle{margin-left:auto}
  .camera-menu{z-index:15;top:52px;left:auto;right:52px;transform:none;width:320px;padding:9px;border-color:#465156;border-radius:7px;background:rgba(20,26,28,.985);box-shadow:0 18px 42px rgba(0,0,0,.45)}
  .camera-menu-heading{display:flex;align-items:center;justify-content:space-between;padding:3px 3px 10px;border-bottom:1px solid #3a4448}
  .camera-menu-heading strong{font-size:12px}.camera-menu-heading span{color:#8f999b;font-size:9px}
  .camera-menu section{margin:0;padding:10px 2px;border-bottom:1px solid #333d40}
  .camera-group-label{display:block;margin:0 0 7px;color:#899496;font-size:8px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
  .camera-grid{display:grid;gap:5px}.camera-grid.two{grid-template-columns:repeat(2,1fr)}.camera-grid.four{grid-template-columns:repeat(4,1fr)}
  .camera-menu .camera-grid button{width:100%;min-width:0;height:48px;padding:5px 3px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;border:1px solid #394448;border-radius:4px;background:#1a2225;color:#cbd1d2;text-align:center}
  .camera-menu .camera-grid button:hover{background:#30393c;border-color:#667276;color:#f2c961}
  .camera-menu .camera-grid button b{color:#e5bb54;font-size:13px}.camera-menu .camera-grid button span{font-size:9px;font-weight:650}
  .camera-menu .camera-grid button b svg{display:block;width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
  .camera-menu .camera-fit{width:100%;height:48px;margin-top:9px;padding:6px 10px;display:flex;align-items:center;gap:10px;border:1px solid #394448;border-radius:4px;background:#1a2225;color:#d9dede;text-align:left}
  .camera-menu .camera-fit:hover{background:#30393c;border-color:#667276;color:#f2c961}.camera-menu .camera-fit>b{width:24px;color:#e5bb54;font-size:17px;text-align:center}.camera-menu .camera-fit>span{display:grid;gap:2px}.camera-menu .camera-fit strong{font-size:10px}.camera-menu .camera-fit small{color:#8f999b;font-size:8px}
  .north-indicator{top:62px;right:18px}
  .viewport-info{right:12px;left:auto;top:auto;bottom:12px;transform:none;z-index:11;padding:7px 11px;gap:13px;border-radius:4px;background:rgba(20,25,27,.94);font-size:10px}
  .viewport-guides{position:absolute;z-index:11;left:12px;top:58px;bottom:auto;max-width:calc(100% - 24px);display:grid;gap:4px;color:#c1c8ca;font-size:10px;pointer-events:none}
  .viewport-guides>div{min-height:28px;padding:5px 8px;display:flex;align-items:center;gap:10px;border:1px solid #3a4549;border-radius:4px;background:rgba(19,25,27,.92);box-shadow:0 5px 16px rgba(0,0,0,.18);white-space:nowrap}
  .viewport-guides strong{padding-right:10px;border-right:1px solid #455055;color:#e4bd5c;font-size:9px;letter-spacing:.08em;text-transform:uppercase}
  .viewport-guides span{display:inline-flex;align-items:center;gap:4px}
  .viewport-guides kbd{min-width:24px;padding:2px 6px;display:inline-grid;place-items:center;border:1px solid #566267;border-bottom-color:#758186;border-radius:3px;background:#20282b;color:#edf0f0;font:700 9px/1.2 inherit;box-shadow:0 1px 0 #0b0f10}
  .viewport-guides .mouse-symbol{width:11px;height:15px;border:1px solid #7d898c;border-radius:6px;position:relative}
  .viewport-guides .mouse-symbol::before{content:"";position:absolute;left:50%;top:2px;width:1px;height:4px;background:#e4bd5c}
  .viewport-guides .touch-hint{display:none}
}

@media (min-width:1025px) and (max-width:1250px){
  .studio-layout{grid-template-columns:250px minmax(360px,1fr) 290px}
  .studio-layout.palette-collapsed{grid-template-columns:0 minmax(360px,1fr) 290px}
  .studio-layout.inspector-collapsed{grid-template-columns:250px minmax(360px,1fr) 0}
  .studio-layout.palette-collapsed.inspector-collapsed{grid-template-columns:0 minmax(360px,1fr) 0}
  .studio-topbar .save-state{display:none}
  .studio-topbar .button,.studio-topbar .icon-button{padding-inline:8px;font-size:10px}
  .palette-panel .piece-palette{grid-template-columns:1fr}
  .viewport-guides>div{gap:8px}.viewport-guides{font-size:9px}.viewport-guides kbd{min-width:22px;padding-inline:5px}
}

@media (max-width:1024px){.viewport-guides{display:none}}