/* FRAMEA 3D builder — mobile app layout (phones and small tablets). */
@media (max-width: 900px) {
 body.mobile-ui { overflow: hidden; }
 body.mobile-ui .studio-shell {
  height: 100dvh; min-height: 0; overflow: hidden;
  display: grid; grid-template-rows: auto minmax(0, 1fr) auto; 
 }
 body.mobile-ui .studio-header { height: 56px; padding: 0 14px; gap: 10px; }
 body.mobile-ui .header-divider, body.mobile-ui .workspace-name, body.mobile-ui .back-link { display: none; }
 body.mobile-ui .brand { font-size: 24px; }
 body.mobile-ui .header-actions { gap: 2px; }
 body.mobile-ui .header-actions button { font-size: 13px; padding: 6px 8px; }

 body.mobile-ui .workspace { display: block; position: relative; min-height: 0; height: 100%; overflow: hidden; }
 body.mobile-ui .workspace > * { display: none; }
 body.mobile-ui .workspace > .m-active { display: block; height: 100%; max-height: none; min-height: 0; border: 0; }
 body.mobile-ui .library.m-active,
 body.mobile-ui .build-panel.m-active { overflow: auto; -webkit-overflow-scrolling: touch; padding-bottom: 20px; }
 body.mobile-ui .build-panel.m-active { display: flex; flex-direction: column; }
 body.mobile-ui .viewport.m-active { display: block; }

 /* 3D scene overlays: keep everything inside the screen, tap-sized. */
 body.mobile-ui .scene-heading { inset: 14px 14px auto; }
 body.mobile-ui .scene-heading h2 { font-size: 18px; margin-top: 4px; }
 body.mobile-ui .scene-badge { display: none; }
 body.mobile-ui .scene-tools { top: auto; bottom: 14px; left: 14px; }
 body.mobile-ui .scene-tools button { min-height: 40px; padding: 4px 12px; }
 body.mobile-ui .view-tools { top: 68px; right: 10px; flex-direction: row; gap: 5px; }
 body.mobile-ui .view-tools button { min-height: 34px; padding: 5px 9px; background: #172125cc; border-radius: 16px; }
 body.mobile-ui .scene-bottom { bottom: 84px; left: 12px; right: 12px; }
 body.mobile-ui .scene-bottom > p:first-child, body.mobile-ui .scene-bottom .model-note { display: none; }
 body.mobile-ui .scene-toggles { flex-wrap: wrap; }
 body.mobile-ui .scene-toggles button { min-height: 38px; }
 body.mobile-ui .scene-toast { bottom: 120px; }

 /* Panels: bigger type, bigger touch targets. */
 body.mobile-ui .library { padding: 18px 14px; }
 body.mobile-ui .panel-intro { display: none; }
 body.mobile-ui .package-options { grid-template-columns: repeat(3, 1fr); gap: 7px; margin: 0 0 20px; }
 body.mobile-ui .package-choice { flex-direction: column; text-align: center; gap: 6px; padding: 12px 6px; }
 body.mobile-ui .package-choice img { width: 54px; height: 54px; }
 body.mobile-ui .filter-row { position: sticky; top: 0; z-index: 2; background: var(--panel); padding-top: 4px; }
 body.mobile-ui .filter-row button { min-height: 38px; font-size: 13px; padding: 6px 13px; }
 body.mobile-ui .module-card { grid-template-columns: 56px 1fr 44px; min-height: 76px; padding: 10px; }
 body.mobile-ui .module-card img { width: 56px; height: 56px; }
 body.mobile-ui .module-card h3 { font-size: 15px; }
 body.mobile-ui .module-card p, body.mobile-ui .module-card small { font-size: 13px; }
 body.mobile-ui .module-card > button { width: 44px; min-height: 44px; font-size: 24px; }
 body.mobile-ui .build-panel > section { padding: 16px 14px; overflow: auto; }
 body.mobile-ui .right-tabs button { min-height: 46px; font-size: 14px; }
 body.mobile-ui .control-field { margin: 16px 0; }
 body.mobile-ui .control-field input[type=range] { height: 32px; }
 body.mobile-ui .small-guide { display: none; }
 body.mobile-ui .checkout-dock { display: none; }

 /* Bottom navigation + always-visible checkout bar. */
 body.mobile-ui .m-bar { display: block; }
 body.mobile-ui .m-tabs {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px;
  padding: 6px 8px; background: #111719; border-top: 1px solid var(--line);
 }
 body.mobile-ui .m-tabs button {
  border: 0; min-height: 46px; font-size: 13px; border-radius: 10px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: #b6c5c9;
 }
 body.mobile-ui .m-tabs button i { font-style: normal; font-size: 17px; line-height: 1; }
 body.mobile-ui .m-tabs button[aria-pressed=true] { color: var(--accent); background: #17303699; }
 body.mobile-ui .m-tabs button b {
  font-size: 11px; background: var(--accent); color: #06232a; border-radius: 10px;
  padding: 0 6px; margin-left: 4px;
 }
 body.mobile-ui .m-checkout {
  display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 12px;
  padding: 10px 14px max(10px, env(safe-area-inset-bottom));
  background: #111719; border-top: 1px solid var(--line);
 }
 body.mobile-ui .m-checkout .m-total small { display: block; font-size: 11px; color: var(--muted); letter-spacing: .06em; }
 body.mobile-ui .m-checkout .m-total strong { font-size: 24px; letter-spacing: -.5px; }
 body.mobile-ui .m-checkout button {
  min-height: 52px; width: 100%; font-size: 16px; font-weight: 600; border: 0; border-radius: 12px;
  color: #06232a; background: var(--accent);
 }
 body.mobile-ui .m-checkout button:disabled { opacity: .6; }

 /* Dialogs full screen on phones. */
 body.mobile-ui dialog { width: 100%; max-width: 100%; max-height: 100dvh; margin: 0 auto auto; border-radius: 0; }
 body.mobile-ui .checkout-content { padding: 20px 16px calc(20px + env(safe-area-inset-bottom)); }
 body.mobile-ui .checkout-content h2 { font-size: 25px; }
 body.mobile-ui .checkout-buttons { flex-direction: column; }
 body.mobile-ui .checkout-buttons button { min-height: 50px; font-size: 15px; }
}
.m-bar { display: none; }