.psc{z-index:40;display:flex;flex-direction:column;align-items:center;width:36px;flex-shrink:0;padding:2px;background:var(--background-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-default);box-shadow:var(--shadow-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.psc--overlay{position:absolute;bottom:16px;right:28px}.psc--sticky{position:sticky;bottom:16px;margin-left:auto;margin-right:28px}.psc--overlay.psc--gutter{right:max(28px,calc((100% - var(--psc-column-width, var(--content-max-width))) / 2 - 52px))}.psc--sticky.psc--gutter{margin-right:max(28px,calc((100% - var(--psc-column-width, var(--content-max-width))) / 2 - 52px))}.psc-btn{position:relative;display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;background:#0000;border:none;border-radius:var(--radius-sm);color:var(--ink-secondary);cursor:pointer;transition:background var(--duration-fast) var(--ease-default),color var(--duration-fast) var(--ease-default)}.psc-btn:hover:not(:disabled){background:var(--background-hover);color:var(--ink-primary)}.psc-btn:active:not(:disabled){background:var(--background-tertiary)}.psc-btn:disabled{opacity:.4;cursor:not-allowed}.psc-btn:after{content:"";position:absolute;inset:-1px -6px}.psc-btn:first-child:after{top:-7px}.psc-btn:last-child:after{bottom:-7px}