/* Responsive overrides — small viewports up to 700px, narrow phones up to 400px. */
@media(max-width:700px){
  /* Sidebar becomes a slide-in drawer. Use a comfortable fixed width rather than
     --sw: on a phone-width viewport the desktop resize logic clamps --sw down to
     its 200px minimum, which collapses the session-name column to a few pixels. */
  #sb{
    position:fixed;top:0;left:0;
    height:100vh;height:100dvh;
    z-index:100;
    width:min(86vw,330px)!important;min-width:0!important;
    transform:translateX(-100%);
    transition:transform .22s ease;
    overflow:hidden;
  }
  #sb.mobile-open{transform:translateX(0)!important}
  #sb.collapsed{transform:translateX(-100%)!important;width:min(86vw,330px)!important;min-width:0!important}
  .sb-expand{display:none!important}
  /* No edge-resizing in the mobile drawer. */
  .sb-resizer{display:none!important}
  .mob-menu-btn{display:flex}

  /* Touch has no hover, so the per-row actions (favorite / tracker / rename /
     delete) would otherwise stay invisible yet still reserve width, squeezing
     the session title. Reveal them and let the title truncate cleanly. */
  .si-act{opacity:1}
  .si-meta{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

  /* Main fills the full screen — dvh keeps it within the actual visible area on iOS */
  #main{
    width:100vw;min-width:0;
    height:100vh;height:100dvh;  /* dvh excludes iOS browser chrome */
  }

  /* Chat area: must shrink so input bar is never pushed off screen */
  #chat{flex:1;min-height:0;overflow-y:auto}

  /* Welcome screen: don't force min-height:100% on mobile; let it scroll inside #chat */
  #welcome{min-height:auto;padding:24px 16px}

  /* Input area: always pinned at bottom; extra bottom padding for iOS home bar */
  #ia{
    flex-shrink:0;
    padding:8px 10px 14px;
    padding-bottom:calc(14px + env(safe-area-inset-bottom, 0px));
  }

  /* Toolbar */
  #tb{padding:0 10px;gap:8px}
  .tb-title{font-size:13px}
  .prov-pill{display:none}

  /* Chat messages */
  .mrow{padding:10px 12px}
  .ubub{max-width:92%}

  /* Welcome text */
  .wc-title{font-size:22px;letter-spacing:-.4px}
  .wc-sub{font-size:13.5px}
  .wc-features{gap:10px 16px}
  .wc-feat{font-size:12px}
  .ex-grid{grid-template-columns:1fr;max-width:100%}
  .wc-ic{width:60px;height:60px;margin-bottom:14px}

  /* Input hints */
  .hints{gap:4px}
  .hint{font-size:11px;padding:3px 9px}
  #mi{font-size:14px}

  /* Modals */
  .ov{align-items:flex-end}
  .modal{
    width:100vw!important;max-width:100vw!important;
    border-radius:20px 20px 0 0;
    padding:20px 16px calc(20px + env(safe-area-inset-bottom, 0px));
    max-height:92vh;max-height:92dvh;
  }
  .modal.lg{width:100vw!important;max-width:100vw!important}
  .frow{grid-template-columns:1fr!important}
  .tmpl-grid{grid-template-columns:1fr 1fr}
  .set-tabs{overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;padding-bottom:2px}
  .set-tab{white-space:nowrap;font-size:12px;padding:7px 10px}
  .ma{flex-wrap:wrap}

  /* Scores */
  .score-row{gap:5px}
  .sb2{font-size:11px;padding:3px 8px}

  /* Progress */
  .prog-panel{padding:11px 12px}
  .sname{font-size:12px}
  .snotes{font-size:11px}

  /* JSON viewer */
  .jv-tb{gap:6px;flex-direction:column}
  .jv-r{gap:4px;flex-wrap:wrap}
  .ibtn{font-size:11px;padding:3px 7px}

  /* Metrics */
  .metrics-grid{grid-template-columns:repeat(2,1fr)}

  /* Memory modal entry rows */
  .mem-date-row{flex-direction:column}
  .mem-date-row .fg{min-width:0}
}

@media(max-width:400px){
  .ex-grid{gap:8px}
  .ex-card{padding:10px 12px}
  .wc-title{font-size:19px}
  .hint{font-size:10.5px;padding:3px 7px}
  .tmpl-grid{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:1fr}
  .ibar{gap:6px}
}