/* toast */
  .toast{
    position: fixed; left:50%; bottom: calc(40px + env(safe-area-inset-bottom));
    transform: translate(-50%, 12px); z-index:300;
    background: rgba(20,34,48,.92); color:#eef5fb; font-size:14px;
    padding:10px 18px; border-radius:999px;
    box-shadow: 0 14px 34px rgba(0,0,0,.28);
    opacity:0; pointer-events:none;
    transition: opacity .24s ease, transform .24s ease;
  }
  .toast.show{ opacity:1; transform: translate(-50%, 0); }

  @media (max-width: 520px){
    :root{
      --side-pad: 16px;
      --header-h: 56px;
      --avatar-size: 32px;
    }
    .peerpill{ padding: 0 44px; }
    .peerpill .name{ font-size: 18px; }
    .ys-header-left{ left:16px; top:calc(env(safe-area-inset-top) + 16px); height:32px; gap:8px; }
    .backbtn{ width: 32px; height: 32px; }
    .backbtn svg{ width: 20px; height: 20px; }
    .header-actions{ right: 16px; top: calc(env(safe-area-inset-top) + 16px); gap: 26px; height:32px; }
    .topbtn{ width:32px; height:32px; }
    .topbtn svg{ width:22px; height:22px; }
    .topbtn.more svg{ width:20px; height:20px; }
    .avatar{ right: 16px; top: calc(env(safe-area-inset-top) + 16px); }
    .row{ margin-top: 18px; }
    .row.grouped{ margin-top: 8px; }
    .row.ai{ padding-left: 42px; }
    .bubble{ max-width: min(63vw, 520px); font-size: 13.5px; line-height: 1.56; padding: 8px 13px 8px; }
    .meta{ font-size: 11px; margin-left: 8px; }
    .day{ font-size: 12px; }
    .new-divider{ font-size: 12px; margin: 14px 0 10px; }
    .composer{ gap: 5px; padding-left: 16px; padding-right: 16px; }
    .floatbtn{ width: 36px; height: 36px; }
    .floatbtn svg{ width: 20px; height: 20px; }
    .composer .field{ min-height: 42px; padding: 4px 8px 4px 12px; }
    textarea{ font-size: 15px; }
    .row.think{ padding-left: 0; padding-right: 0; }
    .think-block{ width: min(63vw, 520px); max-width: min(63vw, 520px); }
    .think-block.open{ width: min(63vw, 520px); max-width: min(63vw, 520px); }
    .row.think.think-open{ padding-left: 0; padding-right: 0; }
    .think-caption{ font-size: 12.5px; letter-spacing: .07em; }
    .think-caption-star, .think-state{ font-size: 1.2em; }
    .think-body{ margin-top: 12px; }
    .think-text{ width: min(86%, 360px); font-size: 12px; line-height: 1.66; }
  }