#guide {
  width: min(800px, calc(100vw - 24px));
  max-height: min(860px, 90dvh);
  padding: 0;
  border: 1px solid #beccda;
  border-radius: 16px;
  background: #fff;
  color: #172f48;
  box-shadow: 0 26px 80px #122d4b33;
}
#guide[open] { display: flex; flex-direction: column; }
#guide::backdrop { background: #12233788; }
#guide .bg-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex: 0 0 auto; padding: 18px 25px;
  background: #fff; border-bottom: 1px solid #dde5ec;
}
#guide .bg-head p, #guide .bg-kicker {
  margin: 0 0 4px; font: 650 11px/1.3 var(--mono, monospace);
  text-transform: uppercase; letter-spacing: .11em;
}
#guide .bg-head p { color: #59708a; }
#guide .bg-head h2 { margin: 0; font-size: 25px; letter-spacing: -.04em; }
#guide #closeGuide { min-width: 34px; height: 34px; padding: 0; font-size: 16px; }
#guide .bg-body { overflow-y: auto; overscroll-behavior: contain; padding: 20px 25px 24px; }
#guide .bg-demo {
  display: grid; grid-template-columns: 1fr 140px; gap: 24px;
  align-items: center; padding: 20px 24px; border-radius: 10px;
  color: #eff9ff; background: #132c46;
}
#guide .bg-demo h3 { color: #fff; font-size: clamp(24px, 3.4vw, 32px); line-height: 1.08; letter-spacing: -.045em; margin: 0 0 8px; }
#guide .bg-demo .bg-kicker { color: #9fdce7; }
#guide .bg-demo p:not(.bg-kicker) { color: #dbe7f2; font-size: 14px; line-height: 1.5; margin: 0 0 12px; }
#guide .bg-demo a { color: white; font-weight: 650; text-underline-offset: 4px; }
#guide .bg-demo img { display: block; width: 100%; height: auto; border: 1px solid #628297; border-radius: 4px; image-rendering: pixelated; }
#guide .bg-nav, #guide .bg-reading { margin-top: 20px; }
#guide .bg-nav h3, #guide .bg-reading h3 { margin: 0 0 10px; font-size: 16px; }
#guide .bg-tools, #guide .bg-reading > div { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 9px; }
#guide .bg-tools button, #guide .bg-reading > div > a {
  display: flex; flex-direction: column; align-items: start; justify-content: start; gap: 5px;
  white-space: normal; height: auto; padding: 12px 13px;
  text-align: start; font-family: inherit; border: 1px solid #d2dee7;
  border-radius: 7px; color: #183958; background: #f8fafc; text-decoration: none;
}
#guide .bg-tools button:hover, #guide .bg-reading > div > a:hover { border-color: #5981a6; background: #edf4fa; }
#guide .bg-tools strong, #guide .bg-reading strong { font-size: 14px; }
#guide .bg-tools small, #guide .bg-reading small { color: #475e74; font-size: 12px; line-height: 1.45; font-weight: 400; }
#guide .bg-reading > div { grid-template-columns: repeat(2, minmax(0, 1fr)); }
#guide .bg-reading > p { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 10px 0 18px; }
#guide .bg-reading > p a { font-size: 12px; color: #244e77; text-underline-offset: 3px; }
#guide .bg-ref { border-top: 1px solid #dce5ed; padding: 9px 0; font-size: 13px; }
#guide .bg-ref summary { cursor: pointer; font-weight: 650; }
#guide .bg-ref dl { display: grid; grid-template-columns: max-content 1fr; align-items: baseline; gap: 6px 12px; }
#guide .bg-ref dt { font: 600 12px monospace; }
#guide .bg-ref dd { margin: 0; }
#guide .bg-scroll { overflow-x: auto; }
#guide :is(a,button,summary):focus-visible { outline: 3px solid #438cb6; outline-offset: 2px; }
@media (max-width: 580px) {
  #guide .bg-head { padding: 13px 15px; }
  #guide .bg-body { padding: 12px; }
  #guide .bg-demo { grid-template-columns: 1fr 80px; gap: 11px; padding: 14px; }
  #guide .bg-demo h3 { font-size: 23px; }
  #guide .bg-tools, #guide .bg-reading > div { grid-template-columns: 1fr; }
  #guide .bg-tools button { display: grid; grid-template-columns: 20px 1fr; align-items: center; gap: 3px 8px; }
  #guide .bg-tools small { grid-column: 2; }
}