/* Full-screen download guide (js/download-guide.js): sharp corners and the app's own greys. */
.download-guide-dialog {
  position: fixed; inset: 0; width: 100%; height: 100dvh; max-width: none; max-height: none; margin: 0; padding: 0;
  border: 0; border-radius: 0; background: var(--a-frame); color: var(--a-heading); color-scheme: dark;
}
.download-guide-dialog[open] { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; }
.download-guide-dialog::backdrop { background: #000; }
.download-guide-dialog [hidden] { display: none !important; }

.dg-bar { display: flex; align-items: center; gap: 16px; height: 52px; padding: 0 12px 0 20px; border-bottom: 1px solid var(--a-border-3); }
.dg-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text); }
.dg-brand > span { padding-left: 12px; border-left: 1px solid var(--a-border-3); color: var(--a-text-3); font-size: 13px; }
.dg-position { margin-left: auto; font: 12px var(--mono); color: var(--a-text-3); }
.dg-close { width: 36px; height: 36px; border: 1px solid var(--a-border-3); border-radius: 0; background: transparent; font-size: 22px; line-height: 1; }
.dg-close:hover { background: var(--a-panel); }

.dg-body { min-height: 0; display: grid; }
.dg-page { min-height: 0; display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(360px, 1fr); }
.dg-page[data-guide-install] { grid-template-columns: minmax(0, 1.9fr) minmax(380px, 1fr); }

/* The picture is the page: the system's own dialog, large, on its own desktop. */
.dg-stage { position: relative; min-height: 0; overflow: hidden; background: #000; border-right: 1px solid var(--a-border-3); }
.dg-stage .demo-mount { position: absolute; inset: 0; }
.dg-stage .cam { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; margin: 0; aspect-ratio: auto; border-radius: 0; box-shadow: none; background: #000; }
/* The walkthrough shows the whole 16:9 desktop, never cropped; the warning picture is zoomed in on purpose. */
.dg-page[data-guide-install] .dg-stage { display: grid; place-items: center; }
.dg-page[data-guide-install] .demo-mount { position: relative; inset: auto; width: min(100%, calc((100dvh - 140px) * 16 / 9)); aspect-ratio: 16 / 9; }
.dg-stage .hot { outline: 2px solid #fff; outline-offset: 5px; animation: dg-hot 1.4s ease-in-out infinite; }
@keyframes dg-hot { 50% { outline-color: rgba(255, 255, 255, 0.3); } }

.dg-copy { min-height: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 24px; padding: clamp(28px, 4vw, 56px); }
/* auto margins centre short content but never clip tall content, which justify-content would */
.dg-copy > :first-child { margin-top: auto; }
.dg-copy > :last-child { margin-bottom: auto; }
.dg-tag { display: block; margin-bottom: 12px; font: 11px var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--a-text-3); }
.dg-copy h2 { font-size: clamp(28px, 3.1vw, 46px); line-height: 1.06; letter-spacing: -0.04em; color: var(--text); }
.dg-copy h2:focus { outline: none; }
.dg-lead { max-width: 54ch; color: var(--muted); font-size: 15px; line-height: 1.6; }
.dg-lead:empty { display: none; }

.dg-facts { margin: 0; border-top: 1px solid var(--a-border-3); }
.dg-facts > div { display: grid; grid-template-columns: 124px minmax(0, 1fr); gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--a-border-3); font-size: 14px; }
.dg-facts dt { padding-top: 2px; font: 11px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--a-text-3); }
.dg-facts dd { margin: 0; color: var(--a-heading); }
.dg-copy a { text-decoration: underline; text-underline-offset: 3px; }

.dg-path { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.dg-path li { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--text); }
.dg-path b { display: grid; place-items: center; flex: none; width: 24px; height: 24px; border: 1px solid var(--a-border-3); font: 500 12px var(--mono); color: var(--a-text-2); }
.dg-links { display: flex; flex-wrap: wrap; gap: 6px 22px; font-size: 13px; color: var(--muted); }

/* Walkthrough page */
.dg-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--a-border-3); }
.dg-steps button { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 14px; width: 100%; padding: 13px 12px; border: 0; border-bottom: 1px solid var(--a-border-3); border-radius: 0; background: transparent; text-align: left; font-size: 15px; color: var(--a-text-2); }
.dg-steps b { font: 500 12px var(--mono); padding-top: 3px; color: var(--a-text-3); }
.dg-steps small { display: block; margin-top: 2px; font-size: 13px; color: var(--a-text-3); }
.dg-steps button:hover { background: var(--a-side); }
.dg-steps li.active button { background: var(--a-panel); color: var(--text); box-shadow: inset 2px 0 0 var(--text); }
.dg-steps li.done button { color: var(--a-text-3); }
.dg-steps li.done b { color: var(--a-ok); }

.dg-file { padding: 18px 20px; border: 1px solid var(--a-border-3); background: var(--a-side); }
.dg-file h3 { font: 500 17px var(--mono); letter-spacing: 0; -webkit-text-stroke: 0; overflow-wrap: anywhere; color: var(--text); }
.dg-file > p { margin-top: 4px; font-size: 13px; color: var(--a-text-3); }
.dg-file details { margin-top: 14px; font-size: 13px; }
.dg-file summary { cursor: pointer; color: var(--a-text-2); }
.dg-file details p { margin-top: 10px; color: var(--a-text-3); }
.dg-file code { display: block; margin-top: 10px; padding: 11px 12px; background: var(--a-frame); color: var(--a-heading); font: 11px/1.7 var(--mono); overflow-wrap: anywhere; white-space: pre-wrap; }
.dg-file small { display: block; margin-top: 14px; color: var(--a-text-3); font-size: 11px; }
.dg-file .dg-btn { margin-top: 12px; height: 34px; font-size: 12px; }
.dg-copy-status { display: block; margin-top: 8px; font-size: 12px; color: var(--a-text-2); }
.dg-request { margin-top: 14px; padding: 11px 12px; border: 1px solid var(--a-border-3); background: var(--a-panel); font-size: 13px; }
.dg-caution { font-size: 12px; line-height: 1.6; color: var(--a-text-3); }
.dg-caution b { color: var(--a-text-2); font-weight: 500; }

/* Footer: the choice of computer and file comes last, next to the way forward. */
.dg-foot { display: flex; align-items: center; gap: 24px; padding: 14px 20px; border-top: 1px solid var(--a-border-3); background: var(--a-side); }
.dg-choose { display: flex; gap: 12px; }
.dg-choose label { display: grid; gap: 4px; min-width: 190px; font-size: 11px; color: var(--a-text-3); }
.dg-choose select { width: 100%; height: 38px; padding: 0 10px; border: 1px solid var(--a-border-3); border-radius: 0; background: var(--a-panel); color: var(--text); font: 14px var(--font); color-scheme: dark; }
.dg-status { flex: 1; min-width: 0; font-size: 13px; color: var(--a-warn); }
.dg-status[data-tone="note"] { color: var(--a-text-3); }
.dg-actions { display: flex; gap: 10px; margin-left: auto; }
.dg-btn { display: inline-flex; align-items: center; justify-content: center; height: 42px; padding: 0 20px; border: 1px solid var(--a-border-3); border-radius: 0; background: transparent; color: var(--text); font: 500 14px var(--font); text-decoration: none; transition: background 0.2s; }
.dg-btn:hover { background: var(--a-panel); }
.dg-primary { border-color: var(--text); background: var(--text); color: #111; }
.dg-primary:hover { background: #fff; }
.dg-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.download-guide-dialog :is(a, button, select, summary):focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

.download-signing-note { margin-top: 10px; font-size: 12px; color: var(--muted); }
.download-signing-note a { text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 860px) {
  .dg-body { overflow-y: auto; display: block; }
  .dg-page { display: block; }
  .dg-stage { height: min(52dvh, 120vw); border-right: 0; border-bottom: 1px solid var(--a-border-3); }
  .dg-page[data-guide-install] .dg-stage { height: auto; }
  .dg-copy { overflow: visible; padding: 24px 20px 32px; gap: 20px; }
  .dg-copy > :first-child, .dg-copy > :last-child { margin-block: 0; }
  .dg-foot { flex-wrap: wrap; gap: 10px 12px; padding: 12px 16px; }
  .dg-choose { width: 100%; }
  .dg-choose label { flex: 1; min-width: 0; }
  .dg-status { flex-basis: 100%; order: 3; }
  .dg-actions { width: 100%; }
  .dg-actions .dg-btn { flex: 1; padding: 0 12px; }
  .dg-brand > span { display: none; }
}
@media (prefers-reduced-motion: reduce) { .dg-stage .hot { animation: none; } }