/* Match the article's restrained newsprint typography and compact controls. */
#preferredSourceSheet {
  box-sizing: border-box;
  position: fixed;
  inset: auto 0 24px;
  width: min(480px, calc(100% - 48px));
  max-width: 480px;
  max-height: calc(100dvh - 48px);
  margin: 0 auto;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  border: 0;
  border-radius: 8px;
  background: var(--surface, #fff);
  color: var(--ink, #14181f);
  box-shadow: 0 8px 40px rgb(0 0 0 / 15%);
  font-family: inherit;
  text-align: left;
}

#preferredSourceSheet:not([open]) { display: none; }
#preferredSourceSheet[open] { animation: preferred-source-enter 180ms ease-out; }
#preferredSourceSheet::backdrop { background: rgb(0 0 0 / 30%); }
#preferredSourceSheet * { box-sizing: border-box; }
#preferredSourceSheet .pss-handle { display: none; }
#preferredSourceSheet .pss-content { padding: 28px; }

#preferredSourceSheet .pss-close {
  position: absolute;
  top: 10px;
  right: 10px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: var(--ink-soft, #555);
  cursor: pointer;
}
#preferredSourceSheet .pss-close:hover { background: var(--paper, #f7f6f3); }

#preferredSourceSheet .pss-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 27px;
  padding-right: 24px;
}
#preferredSourceSheet .pss-brand svg { display: block; flex-shrink: 0; width: 92px; height: 24px; }
#preferredSourceSheet .pss-brand span {
  padding-left: 12px;
  border-left: 1px solid var(--line-strong, #ddd);
  color: var(--ink-faint, #777);
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}

#preferredSourceSheet h2 {
  margin: 22px 0 12px;
  color: inherit;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.035em;
  word-break: keep-all;
}
#preferredSourceSheet p {
  margin: 0;
  color: var(--ink-soft, #555);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: -.02em;
  word-break: keep-all;
}
#preferredSourceSheet .pss-actions {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line, #e5e5e5);
}
#preferredSourceSheet #preferredSourceAdd,
#preferredSourceSheet #preferredSourceDismiss {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 0;
  min-height: 44px;
  padding: 10px 8px;
  border: 1px solid var(--line-strong, #ddd);
  border-radius: 3px;
  background: var(--surface, #fff);
  color: var(--ink-soft, #555);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -.03em;
  text-decoration: none;
  cursor: pointer;
}
#preferredSourceSheet #preferredSourceAdd {
  border-color: var(--ink, #14181f);
  background: var(--ink, #14181f);
  color: var(--surface, #fff);
  font-weight: 600;
}
#preferredSourceSheet #preferredSourceAdd svg { flex-shrink: 0; }
#preferredSourceSheet #preferredSourceDismiss:hover { background: var(--paper, #f7f6f3); }
#preferredSourceSheet :is(a, button):focus-visible { outline: 2px solid var(--ink, #14181f); outline-offset: 3px; }

@media (max-width: 600px) {
  #preferredSourceSheet {
    bottom: 0;
    width: 100%;
    max-width: none;
    max-height: calc(100dvh - 16px);
    border-radius: 12px 12px 0 0;
  }
  #preferredSourceSheet .pss-content { padding: 28px 24px calc(20px + env(safe-area-inset-bottom, 0px)); }
  #preferredSourceSheet .pss-handle {
    display: block;
    position: absolute;
    top: 9px;
    left: calc(50% - 14px);
    width: 28px;
    height: 3px;
    border-radius: 3px;
    background: var(--line-strong, #ddd);
  }
  #preferredSourceSheet .pss-close { top: 19px; right: 12px; }
  #preferredSourceSheet h2 { margin-top: 22px; font-size: 23px; }
}
@media (max-width: 360px) {
  #preferredSourceSheet .pss-content { padding-left: 20px; padding-right: 20px; }
  #preferredSourceSheet .pss-brand { gap: 8px; }
  #preferredSourceSheet .pss-brand span { padding-left: 8px; font-size: 11px; }
  #preferredSourceSheet h2 { font-size: 21px; }
  #preferredSourceSheet .pss-actions { gap: 8px; }
  #preferredSourceSheet #preferredSourceAdd,
  #preferredSourceSheet #preferredSourceDismiss { font-size: 12px; gap: 4px; }
}
@media (prefers-color-scheme: dark) {
  #preferredSourceSheet { color-scheme: dark; box-shadow: 0 8px 40px rgb(0 0 0 / 40%); }
  #preferredSourceSheet::backdrop { background: rgb(0 0 0 / 45%); }
}
@media (prefers-reduced-motion: reduce) {
  #preferredSourceSheet[open] { animation: none; }
}
@media print {
  #preferredSourceSheet,
  #preferredSourceSheet::backdrop { display: none !important; }
}
@keyframes preferred-source-enter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}