/* /duo/ landing rework (27.10.2026, build-duo-landing.py + inject-duo-science.py). Dark site theme from site.css;
   the diagram's colours are variables here, so it follows the theme. */
.duopage {
  --d-ok: #3fd6a2; --d-diff: #ff9f43; --d-bad: #ff5d6c; --d-match: #9c9cf5; --d-q: #9fb0ff;
  --d-panel: rgb(255 255 255 / .05); --d-ink: #0b1a14;
}

/* hero */
.duopage .d-hero .lead { margin-bottom: 20px; }
.duopage .d-hero .btns.dl { margin-top: 0; }
/* second round (27.10.2026): three blocks; desktop — text left (top + bottom), video right; phone — the video right
   under the button */
.duopage .d-hero2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); grid-template-areas: "top vid" "top qr" "bot qr"; column-gap: 36px; row-gap: 0; align-items: start; }
.duopage .d-hero2 .d-h-top { grid-area: top; align-self: end; }
.duopage .d-hero2 > .yt-lite { grid-area: vid; align-self: end; }
.duopage .d-hero2 > .d-qr { grid-area: qr; }
.duopage .d-hero2 .d-h-bot { grid-area: bot; }
.duopage .d-hero2 [hidden] { display: none; }
@media (max-width: 800px) {
  .duopage .d-hero2 { grid-template-columns: minmax(0, 1fr); grid-template-areas: "top" "vid" "qr" "bot"; row-gap: 18px; }
  .duopage .d-hero2 .lead { margin-bottom: 16px; }
}
.duopage details.d-how { margin-top: 10px; color: var(--muted); font-size: .9rem; }
.duopage details.d-how summary { cursor: pointer; color: var(--text); font-weight: 600; }
.duopage details.d-how .under { margin-top: 8px; }
.duopage .d-trust { margin-top: 18px; font-size: .95rem; line-height: 1.45; }
.duopage main p.d-trust a { display: inline-block; color: var(--text); text-decoration: none; border: 1px solid rgb(63 214 162 / .45); background: rgb(63 214 162 / .1); border-radius: 14px; padding: 10px 14px; }
.duopage main p.d-trust a:hover { background: rgb(63 214 162 / .18); }
/* third round (27.10.2026): on a computer (#dl marked "desktop" by duo-landing.js) a QR to the same iCloud link, so the
   iPhone button is not a dead end on a laptop; phones and no-JS never see it. Anything marked [data-line] that the
   script hid (the other device's trust line, "Good to know" on Android) stays hidden wherever it sits. */
.duopage [data-line][hidden] { display: none; }
.duopage .d-qr { display: none; align-items: center; gap: 14px; margin: 16px 0 0; }
.duopage .d-hero2:has(#dl[data-device="desktop"]) > .d-qr { display: flex; margin-top: 18px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; }
.duopage .d-qr svg { flex: none; border-radius: 10px; width: 132px; height: 132px; }
.duopage .d-qr figcaption { max-width: 26ch; color: var(--muted); font-size: .9rem; line-height: 1.4; }
.duopage .d-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; list-style: none; padding: 0; }
.duopage .d-chips li { font-size: .78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }

/* modes: three shown, all twelve folded */
.duopage .d-top3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; list-style: none; padding: 0; }
.duopage .d-top3 li { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; background: rgb(255 255 255 / .04); color: var(--muted); font-size: .92rem; }
.duopage .d-top3 li:first-child { outline: 2px solid var(--d-ok); }
.duopage .d-top3 li b { color: var(--text); }
.duopage .d-top3 li > span { min-width: 0; overflow-wrap: anywhere; }
.duopage .d-top3 li em { font-style: normal; font-weight: 800; color: var(--text); text-align: right; white-space: nowrap; }
.duopage .d-top3 li em small { display: block; font-size: .6rem; color: var(--muted); font-weight: 600; }
.duopage .d-top3 li .em { display: inline-grid; place-items: center; width: 1.7em; height: 1.7em; margin-right: 4px; border-radius: 8px; background: #f3efe6; font-size: .95rem; line-height: 1; vertical-align: middle; }
.duopage details.d-more { margin-top: 16px; border: 1px solid var(--line); border-radius: 16px; padding: 12px 16px; }
.duopage details.d-more > summary { cursor: pointer; font-weight: 700; color: var(--link); }
.duopage details.d-more[open] > summary { margin-bottom: 14px; }
.duopage .rail.sm { margin-top: 14px; font-size: .95rem; } .duopage .rail.sm b { font-size: 1.2rem; }
.duopage .d-pw { display: block; color: var(--pink); letter-spacing: 3px; text-transform: uppercase; font-size: .78rem; font-weight: 700; margin-bottom: 6px; }

/* science block */
.duopage .d-sci-sec .d-sci-p { font-size: 1.05rem; line-height: 1.6; max-width: 72ch; }
.duopage .d-sci-sec .d-sci-p + .d-sci-p { margin-top: 12px; }
.duopage .d-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 22px; }
.duopage .d-tile { border-radius: 18px; padding: 18px; border: 1px solid var(--line); background: var(--d-panel); display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.duopage .d-tile b { font-size: 2.4rem; line-height: 1; font-weight: 900; color: var(--d-ok); }
.duopage .d-tile b small { font-size: 1.1rem; font-weight: 700; color: var(--muted); margin-left: 2px; }
.duopage .d-tile span { color: var(--text); font-size: .92rem; line-height: 1.4; overflow-wrap: anywhere; }
.duopage .d-tile.t-ok { background: rgb(63 214 162 / .1); }
.duopage .d-tile.t-zero { background: rgb(156 156 245 / .12); } .duopage .d-tile.t-zero b { color: var(--d-match); }
.duopage .d-sci-cap { color: var(--muted); font-size: .82rem; margin-top: 10px; }
.duopage details.d-sci-more { margin-top: 20px; border: 1px solid var(--line); border-radius: 18px; padding: 14px 18px; background: rgb(255 255 255 / .02); }
.duopage details.d-sci-more > summary { cursor: pointer; font-weight: 700; color: var(--link); }
.duopage details.d-sci-more[open] > summary { margin-bottom: 16px; }
.duopage details.d-sci-more h3 { font-size: 1.05rem; margin: 22px 0 6px; }
.duopage details.d-sci-more p { line-height: 1.6; max-width: 72ch; }
.duopage details.d-sci-more h3 + p + p { margin-top: 12px; } /* the $20 pair and the Android pair, own paragraph */
.duopage .d-sci-art { margin-top: 10px; font-weight: 600; }
.duopage .d-sci-lim { margin-top: 18px; }
.duopage .d-sci-btns { margin-top: 18px; }
.duopage .d-sci-btns .btn { flex: 1 1 220px; justify-content: center; text-align: center; }

/* the diagram "Two blind answers, one signal" */
.duopage .d-fig { margin: 0; }
.duopage .d-fig figcaption { font-weight: 800; font-size: 1.1rem; margin-bottom: 12px; }
.duopage .d-fig-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.duopage .d-fig svg { display: block; width: 100%; height: auto; max-width: 420px; margin: 0 auto; }
.duopage .d-fig-gt { color: var(--muted); font-size: .85rem; text-align: center; margin-bottom: 8px; }
.duopage .d-fig-gridbox svg { max-width: 300px; }
.duopage .d-fig-legend { list-style: none; padding: 0; margin: 12px auto 0; display: grid; gap: 6px; font-size: .9rem; max-width: 300px; }
.duopage .d-fig-legend li { display: flex; align-items: center; gap: 8px; }
.duopage .d-fig-legend i { flex: none; width: 14px; height: 14px; border-radius: 50%; }
.duopage .d-fig-legend .k-ok { background: var(--d-ok); }
.duopage .d-fig-legend .k-wrong { border: 2px solid var(--d-ok); position: relative; }
.duopage .d-fig-legend .k-wrong::after { content: "\00d7"; position: absolute; inset: -4px 0 0; text-align: center; color: var(--d-bad); font-weight: 900; font-size: 14px; font-style: normal; }
.duopage .d-fig-legend .k-diff { background: var(--d-diff); }
.duopage .d-fig-line { margin-top: 14px; font-weight: 700; text-align: center; }
.duopage .df-box { fill: var(--d-panel); stroke: var(--line); stroke-width: 1.5; }
.duopage .df-q { stroke: var(--d-q); }
.duopage .df-gpt, .duopage .df-ok { stroke: var(--d-ok); fill: rgb(63 214 162 / .1); }
.duopage .df-cl, .duopage .df-diff { stroke: var(--d-diff); fill: rgb(255 159 67 / .1); }
.duopage .df-match { stroke: var(--d-match); fill: rgb(156 156 245 / .12); }
.duopage .df-t { fill: var(--text); font-family: Montserrat, system-ui, sans-serif; }
.duopage .df-b { font-weight: 700; }
.duopage .df-m { fill: var(--muted); }
.duopage .df-i { font-style: italic; }
.duopage .df-cg { fill: var(--d-ok); } .duopage .df-cc { fill: var(--d-diff); }
.duopage .df-ar { stroke: var(--muted); stroke-width: 1.6; fill: none; }
.duopage .df-hd { fill: var(--muted); }
.duopage .df-sep { stroke: var(--muted); stroke-width: 1.2; stroke-dasharray: 4 4; opacity: .7; }
.duopage .df-lock rect { fill: var(--muted); } .duopage .df-lock path { stroke: var(--muted); stroke-width: 2; }
.duopage .dg-ok { fill: var(--d-ok); }
.duopage .dg-tick { stroke: var(--d-ink); stroke-width: 2.2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.duopage .dg-wrong { fill: none; stroke: var(--d-ok); stroke-width: 1.8; }
.duopage .dg-x { stroke: var(--d-bad); stroke-width: 2.4; stroke-linecap: round; }
.duopage .dg-diff { fill: var(--d-diff); }
.duopage .dg-q { fill: var(--d-ink); font-weight: 800; font-family: Montserrat, system-ui, sans-serif; }

/* final call and FAQ */
.duopage .d-cta { margin-top: 56px; border: 1px solid rgb(63 214 162 / .35); border-radius: 22px; padding: 28px 24px; background: linear-gradient(135deg, rgb(63 214 162 / .1), rgb(255 159 67 / .08)); }
.duopage main > section.d-cta { padding-top: 28px; }
.duopage .d-cta h2 { margin-bottom: 8px; }
.duopage .d-cta-p { color: var(--muted); font-size: 1.05rem; margin-bottom: 16px; }
.duopage .d-cta .btns.dl { margin-top: 0; }
.duopage .d-cta-app { margin-top: 16px; font-size: .9rem; color: var(--muted); }
.duopage .d-faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.duopage .d-faq details:first-of-type { border-top: 1px solid var(--line); }
.duopage .d-faq summary { cursor: pointer; font-weight: 700; font-size: 1.02rem; }
.duopage .d-faq details p { margin-top: 8px; color: var(--muted); line-height: 1.6; max-width: 72ch; }

@media (max-width: 800px) {
  .duopage .d-hero .lead { font-size: 1rem; line-height: 1.5; margin-bottom: 16px; }
  .duopage .d-hero h1 { font-size: 1.9rem; }
  .duopage .d-top3, .duopage .d-tiles, .duopage .d-fig-row { grid-template-columns: minmax(0, 1fr); }
  .duopage .d-tile { flex-direction: row; align-items: center; gap: 14px; padding: 14px 16px; }
  .duopage .d-tile b { font-size: 2rem; flex: none; min-width: 4.6rem; }
  .duopage details.d-sci-more { padding: 12px 14px; }
  .duopage .d-cta { padding: 22px 16px; }
}
/* fourth round (28.10.2026): "install Claude and sign in" under the iPhone buttons; the install steps as a short list;
   the limits of the science block as a list instead of one grey paragraph; the "not money" note under the modes */
.duopage p.d-need { margin-top: 8px; }
.duopage p.d-need a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; white-space: nowrap; }
.duopage .d-cta p.d-need { color: var(--muted); font-size: .9rem; margin-top: 12px; }
.duopage ol.d-how-steps { margin: 8px 0 0; padding-left: 1.3em; }
.duopage ol.d-how-steps li + li { margin-top: 6px; }
.duopage ul.d-sci-lim { padding-left: 1.1em; }
.duopage ul.d-sci-lim li + li { margin-top: 6px; }
.duopage .d-msgs { margin-top: 10px; font-size: .9rem; }
/* Korean: break between words, not inside them (the H1 split "함께" across lines at 390 px) */
html[lang="ko"] body.duopage { word-break: keep-all; overflow-wrap: anywhere; }
.duopage p.d-first, .duopage p.d-play { margin-top: 6px; }
.duopage .d-cta p.d-first { color: var(--muted); font-size: .9rem; margin-top: 6px; }

/* conversion audit item 4: one conditions line and the three-block example under the button; the rest is in "How to install" */
.duopage p.d-cond { margin-top: 8px; font-size: .88rem; line-height: 1.4; }
.duopage .d-ex { margin-top: 14px; }
.duopage .d-ex .d-ex-cap { margin: 0 0 4px; color: var(--muted); font-size: .85rem; }
.duopage .d-ex .d-q { margin: 0 0 8px; font-size: .9rem; }
.duopage .d-ex .cards { gap: 8px; }
.duopage .d-ex .card { padding: 10px 12px; }
.duopage .d-ex .card h3 { font-size: .85rem; margin: 0 0 4px; }
.duopage .d-ex .card p { font-size: .82rem; line-height: 1.4; margin: 0; }
@media (max-width: 800px) { .duopage .d-ex .cards { grid-template-columns: minmax(0, 1fr); } }
.duopage p.d-how-intro { margin: 8px 0 0; }
.duopage .d-firstrun { margin-top: 10px; padding: 10px 12px; border: 1px solid var(--border, #d0d7de); border-left: 4px solid var(--link); border-radius: 8px; background: color-mix(in srgb, var(--link) 7%, transparent); }
.duopage .d-firstrun p { margin: 0; }
.duopage .d-firstrun .d-fr-h { font-weight: 700; color: var(--text); }
.duopage .d-firstrun .d-fr-p { margin-top: 4px; color: var(--muted); font-size: .9rem; }
.duopage details.d-trouble { margin-top: 6px; font-size: .9rem; color: var(--muted); }
.duopage details.d-trouble summary { cursor: pointer; color: var(--text); font-weight: 600; }
.duopage details.d-trouble ul { margin: 6px 0 0; padding-left: 1.2em; }
.duopage details.d-trouble li + li { margin-top: 4px; }
.duopage .d-forum { margin-top: 28px; }
.duopage .fx { max-width: 680px; margin-top: 14px; border: 1px solid rgba(120,170,255,.22); border-radius: 16px; overflow: hidden; background: #0a1226; color: #eef2ff; font-size: .93rem; line-height: 1.5; }
.duopage .fx a { color: #8adcff; overflow-wrap: anywhere; }
.duopage .fx p { margin: 0; }
.duopage .fx-bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: #0e1936; border-bottom: 1px solid rgba(120,170,255,.14); }
.duopage .fx-bar small { display: block; color: #9fb0d8; font-size: .75rem; }
.duopage .fx-logo { flex: none; width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg,#3b82f6,#8adcff); color: #050a18; font-weight: 800; display: grid; place-items: center; }
.duopage .fx-title { margin: 12px 14px 4px; font-size: 1.05rem; line-height: 1.3; color: #fff; }
.duopage .fx-meta, .duopage .fx-note { color: #9fb0d8; font-size: .8rem; }
.duopage .fx p.fx-meta { margin: 0 14px 8px; }
.duopage .fx-post { display: flex; gap: 10px; padding: 12px 14px; border-top: 1px solid rgba(120,170,255,.14); }
.duopage .fx-post.fx-author { background: rgba(138,220,255,.06); border-left: 3px solid #8adcff; padding-left: 11px; }
.duopage .fx-av { flex: none; width: 34px; height: 34px; border-radius: 50%; background: #1d2f63; color: #8adcff; font-weight: 700; display: grid; place-items: center; }
.duopage .fx-main { min-width: 0; flex: 1; }
.duopage .fx-who { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; }
.duopage .fx-date { margin-left: auto; color: #9fb0d8; font-size: .75rem; }
.duopage .fx-badge { background: #8adcff; color: #050a18; border-radius: 99px; padding: 0 8px; font-size: .7rem; font-weight: 700; }
.duopage .fx-body p + p { margin-top: .6em; }
.duopage .fx-mod { margin-top: 8px; padding: 6px 10px; border-left: 3px solid #f0b429; background: rgba(240,180,41,.08); font-size: .85rem; }
.duopage .fx details > summary { list-style: none; cursor: pointer; padding: 10px 14px; text-align: center; font-weight: 700; color: #8adcff; border-top: 1px solid rgba(120,170,255,.14); background: #0e1936; }
.duopage .fx details > summary::-webkit-details-marker { display: none; }
.duopage .fx details > summary:hover { background: #14224a; }
.duopage .fx details .fx-s-close, .duopage .fx details[open] .fx-s-open { display: none; }
.duopage .fx details[open] .fx-s-close { display: inline; }
.duopage .fx-body details > summary { margin-top: 6px; padding: 4px 0; border: 0; background: none; text-align: left; }
.duopage .fx-foot { padding: 10px 14px; border-top: 1px solid rgba(120,170,255,.14); font-weight: 600; }
.duopage .fx-rd { background: #0b1416; border-color: rgba(255,255,255,.14); }
.duopage .fx-rd .fx-bar { background: #1a282d; }
.duopage .fx-rd .fx-logo { background: #ff4500; color: #fff; }
.duopage .fx-rd a { color: #ff8b60; }
.duopage .fx-rd details > summary { background: none; color: #ff8b60; }
.duopage .fx-rpost { padding: 10px 14px 4px; }
.duopage .fx-rwho { color: #9fb0d8; font-size: .8rem; }
.duopage .fx-rwho b { color: #eef2ff; }
.duopage .fx-rd .fx-title { margin: 4px 0 8px; }
.duopage .fx-rcom { margin: 0 14px 10px 22px; padding: 6px 0 6px 12px; border-left: 2px solid rgba(255,255,255,.2); }