/* The bottom panel is for mobile; desktop keeps its original side drawer. */
@container atelier-viewport (max-width:900px){
  .app-frame{--header-height:54px;--drawer-height:min(380px,62cqh)}
  .header{padding:0 18px}
  .header-tab{display:none}
  .configuration{inset:auto 0 0;width:100%;height:var(--drawer-height);padding:14px 20px;border-left:0;border-top:1px solid var(--line);border-radius:16px 16px 0 0;transform:translateY(105%);box-shadow:0 -10px 36px #5b49351c}
  .configuration.is-open{transform:translate(0,0)}
  .atelier[data-config-open=true] #viewer{bottom:var(--drawer-height)}
  .configuration-heading .eyebrow,.configuration-heading .intro{display:none}
  .configuration-heading h2{font-size:26px;line-height:1.15;letter-spacing:-.7px;margin:0}
  .configuration-tabs{margin:8px 0 12px;padding-right:0;gap:4px}
  .configuration-tabs button{min-height:34px;font-size:11px}
  .configuration-footer{padding-top:9px}
  .configuration-footer .primary-button{min-height:38px;font-size:14px;padding:0 14px}
  .creation-summary,.save-note{display:none}
  .drawer-close{right:13px;top:10px}
  .customize-button{right:50%;transform:translateX(50%);bottom:61px;min-height:39px;padding:0 24px;font-size:15px}
  .stage-heading{top:12px}
  .stage-heading h1{font-size:27px;margin-top:4px}
  .stage-heading .eyebrow{font-size:7px;letter-spacing:1.6px}
  .reset-camera{top:8px;right:12px}
  .viewer-controls{bottom:12px;gap:7px}
  .atelier:not([data-config-open=true]) .viewer-controls{left:0;right:0}
  .viewer-controls .pill{min-width:93px;height:32px;padding:0 11px;font-size:10px;gap:6px}
  .atelier[data-config-open=true] .stage-heading{right:0}
  .atelier[data-config-open=true] .viewer-controls{left:0;right:0;bottom:calc(var(--drawer-height) + 12px)}
  .atelier[data-config-open=true] .reset-camera{right:12px}
  .section-title{margin-bottom:12px}
  .section-title h3,.section-title label{font-size:20px}
  .option-section,.option-section:first-child,.option-section:nth-child(2){padding-bottom:0}
  .sample{width:38px;height:38px}
  .swatch{font-size:10px;gap:7px}
  .swatches:not(.metal-swatches){gap:12px 8px}
  .metal-swatches .sample{width:40px;height:40px}
  .segmented button{height:36px;font-size:11px}
  .option-note{font-size:10px;margin-top:10px}
  .initials-section>.section-title{position:absolute;width:1px;height:1px;padding:0;margin:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
  .initials-input{height:35px}
  .initials-input input{font-size:16px}
  .initials-section>.option-note{display:none}
  .marking-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:14px;row-gap:3px;margin-top:7px;padding-top:7px}
  .marking-location{grid-column:1/-1;margin:0 0 3px;font-size:10px;gap:8px}
  .marking-location select{max-width:160px;padding:5px 18px 5px 7px;font-size:10px}
  .placement-heading{grid-column:1/-1;margin:0;font-size:10px;min-height:18px}
  .range-label{flex-direction:column;gap:3px;margin:2px 0 0;font-size:9px}
  .range-label output{font-size:8px}
  .range-label[for=marking-x]{grid-column:1;grid-row:3}
  .range-label[for=marking-y]{grid-column:2;grid-row:3}
  .range-label[for=marking-scale]{grid-column:3;grid-row:3}
  #marking-x{grid-column:1;grid-row:4}
  #marking-y{grid-column:2;grid-row:4}
  #marking-scale{grid-column:3;grid-row:4}
  .placement-range{margin:9px 0 7px}
  .marking-controls>.option-note{display:none}
  .marking-view{grid-column:1/-1;padding:4px 0;margin:0;font-size:10px}
  .initials-keyboard{bottom:8px;width:calc(100% - 16px);padding:8px}
  .initials-keyboard-row{gap:4px}
  .initials-keyboard-key{height:38px;font-size:12px}
  .initials-keyboard-action{font-size:10px}
}
@container atelier-viewport (max-width:559px) and (max-height:740px){
  .app-frame{--drawer-height:min(330px,52cqh)}
  .configuration-heading{display:none}
  .configuration-tabs{margin-top:0;padding-right:29px;gap:1px}
  .configuration{padding-top:12px;padding-bottom:12px}
  .atelier[data-config-open=true] .stage-heading{opacity:0}
}
@container atelier-viewport (max-width:900px) and (max-height:600px){
  .app-frame{--drawer-height:min(330px,52cqh)}
  .configuration-heading{display:none}
  .configuration-tabs{margin-top:0;padding-right:29px;gap:1px}
  .atelier[data-config-open=true] .stage-heading{opacity:0}
}