/* ==========================================================================
   3D view — styles of the Signal journey (from ../VisitPageSignal/styles.css),
   scoped to <html data-mode="3d">. Header, bottom bar, dialogs and colours
   shared with the 2D view live in base.css.
   ========================================================================== */
[data-mode="3d"] summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
[data-mode="3d"] #chip-scene { position: fixed; inset: 0; width: 100%; height: 100%; }
[data-mode="3d"] .scene-shade { position: fixed; inset: 0; pointer-events: none; background: linear-gradient(90deg,#051015f7 0%,#051015d9 23%,#05101555 44%,transparent 69%),linear-gradient(0deg,#051015f2 0%,transparent 33%,transparent 80%,#0510158c 100%); }
[data-mode="3d"] .experience button, [data-mode="3d"] .experience a, [data-mode="3d"] .reading-panel { pointer-events: auto; }
[data-mode="3d"] .reading-panel { position: absolute; left: 5%; top: 27px; width: min(var(--panel-width),35vw); outline: none; z-index: 3; transition: height var(--panel-fade) ease; }
[data-mode="3d"] .section-card { position: absolute; inset: 0 0 auto; opacity: 0; transform: translateY(9px); transition: opacity var(--panel-fade) ease, transform var(--panel-fade) ease; }
[data-mode="3d"] .section-card.is-current { opacity: 1; transform: translateY(0); }
[data-mode="3d"] .section-card.is-leaving { pointer-events: none; }
[data-mode="3d"] .section-card.is-leaving * { pointer-events: none !important; }
[data-mode="3d"] .breadcrumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; min-height: 15px; margin-bottom: 17px; font-size: 9px; line-height: 1.6; color: #7f9b9e; }
[data-mode="3d"] .breadcrumbs a { color: #b5c8c6; }
[data-mode="3d"] .breadcrumbs a:hover { color: var(--accent); text-decoration: underline; }
[data-mode="3d"] .breadcrumbs [aria-current] { color: var(--accent); }
[data-mode="3d"] .eyebrow { display: flex; align-items: center; gap: 14px; font-size: 8px; letter-spacing: 1.8px; color: #b0c5c3; margin-bottom: 20px; }
[data-mode="3d"] .chapter-number { color: var(--accent); font-variant-numeric: tabular-nums; }
[data-mode="3d"] .eyebrow-line { width: 30px; height: 1px; background: #627473; }
[data-mode="3d"] h1 { font-size: clamp(37px,4vw,57px); line-height: 1.08; font-weight: 400; letter-spacing: -2px; white-space: pre-line; text-wrap: balance; margin: 0 0 20px; }
[data-mode="3d"] h1 span { color: var(--accent); }
[data-mode="3d"] body[data-route-kind=loop] h1 { font-size: clamp(32px,3.3vw,46px); }
[data-mode="3d"] .panel-intro { font-size: 12px; line-height: 1.8; max-width: 330px; color: var(--muted); margin: 0 0 21px; }
[data-mode="3d"] .intro-tags { display: flex; gap: 7px; flex-wrap: wrap; margin: 22px 0 28px; }
[data-mode="3d"] .intro-tags span { border: 1px solid var(--line); padding: 7px 9px; font-size: 9px; color: #a9bfbd; }
[data-mode="3d"] .route-options-label { font-size: 8px; letter-spacing: 1.4px; color: #839d9f; margin: 0 0 8px; }
[data-mode="3d"] .route-options { margin: 0 0 22px; max-width: 330px; }
[data-mode="3d"] .route-options a { display: flex; gap: 11px; align-items: center; min-height: 40px; padding: 9px 4px 9px 0; border-top: 1px solid var(--line); color: #d3dfdb; font-size: 12px; line-height: 1.4; transition: color .2s, background .2s; }
[data-mode="3d"] .route-options a:last-child { border-bottom: 1px solid var(--line); }
[data-mode="3d"] .route-options a:hover { color: var(--accent); background: linear-gradient(90deg,#eac88310,transparent); }
[data-mode="3d"] .option-number { font-size: 8px; color: #708f94; }
[data-mode="3d"] .option-symbol { margin-left: auto; color: var(--accent); font-size: 15px; }
[data-mode="3d"] .panel-items { margin-bottom: 23px; }
[data-mode="3d"] .panel-item { display: flex; align-items: center; gap: 10px; border-top: 1px solid var(--line); padding: 10px 0; font-size: 11px; color: #c0d2cd; }
[data-mode="3d"] .panel-item:before { content: ''; width: 3px; height: 3px; background: var(--accent); flex-shrink: 0; }
[data-mode="3d"] .loop-status { display: flex; align-items: center; gap: 12px; color: #a6c4c3; font-size: 10px; line-height: 1.6; margin: 0 0 20px; }
[data-mode="3d"] .loop-ring { width: 30px; height: 30px; border-radius: 50%; padding: 2px; flex-shrink: 0; background: conic-gradient(var(--accent) calc(var(--progress,0)*1turn),#4a717355 0); }
[data-mode="3d"] .loop-ring:before { content: '↺'; display: grid; place-items: center; width: 26px; height: 26px; background: var(--background); border-radius: 50%; color: var(--accent); font-size: 18px; }
[data-mode="3d"] .loop-status span { display: block; }
[data-mode="3d"] .loop-status small { color: #819fa2; font-size: 8px; }
[data-mode="3d"] .panel-actions { display: flex; align-items: center; gap: 11px; }
[data-mode="3d"] .primary-action { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 100%; min-height: 44px; background: var(--accent); color: #152629; border: 1px solid var(--accent); padding: 12px 16px; text-align: left; font-size: 11px; line-height: 1.4; }
[data-mode="3d"] .primary-action:hover { background: #f5dca9; }
[data-mode="3d"] .previous { width: 44px; height: 44px; border: 1px solid var(--line); background: #07141955; font-size: 18px; }
[data-mode="3d"] .prototype-note { font-size: 8px; color: #779397; letter-spacing: .3px; margin-top: 14px; }
[data-mode="3d"] .travel-status { position: absolute; top: 20px; right: 5%; width: 190px; display: grid; grid-template-columns: 1fr auto; gap: 10px 20px; font-size: 8px; letter-spacing: 1px; color: #9db5b5; }
[data-mode="3d"] .travel-status>div:first-child { display: flex; align-items: center; gap: 9px; }
[data-mode="3d"] #journey-percent { color: var(--accent); font-variant-numeric: tabular-nums; }
[data-mode="3d"] .travel-line { grid-column: 1/-1; height: 1px; background: var(--line); }
[data-mode="3d"] #travel-fill { display: block; width: 0; height: 1px; background: var(--accent); }
[data-mode="3d"] .scroll-cue { position: absolute; bottom: 108px; left: 5%; right: 5%; display: flex; align-items: center; gap: 13px; color: #a3b9b8; font-size: 10px; line-height: 1.5; }
[data-mode="3d"] .scroll-icon { font-size: 18px; color: var(--accent); }
[data-mode="3d"] .key-hint { margin-left: auto; font-size: 10px; letter-spacing: .5px; color: #6c888c; white-space: pre; }
[data-mode="3d"] .scene-media { position: fixed; inset: 0; pointer-events: none; z-index: 1; }
[data-mode="3d"] .travel-status, [data-mode="3d"] .scroll-cue { z-index: 3; }
[data-mode="3d"] .media-board { position: absolute; top: 0; left: 0; width: 340px; margin: 0; transform-origin: 50% 50%; opacity: 0; visibility: hidden; will-change: transform, opacity; }
[data-mode="3d"] .media-board button { width: 100%; padding: 0; text-align: left; border: 1px solid #98ceca66; background: #0a2228f5; box-shadow: 0 15px 45px #0005; cursor: zoom-in; }
[data-mode="3d"] .media-board button:hover { border-color: var(--accent); }
[data-mode="3d"] .media-board img { display: block; width: 100%; aspect-ratio: 1.6; object-fit: cover; }
[data-mode="3d"] .media-board figcaption { padding: 15px 18px; border-top: 1px solid #a1cbcc33; }
[data-mode="3d"] .media-board .media-kicker { font-size: 8px; letter-spacing: 1.5px; color: var(--accent); margin-bottom: 7px; }
[data-mode="3d"] .media-board strong { font-size: 18px; font-weight: 400; line-height: 1.3; display: block; }
[data-mode="3d"] .media-board .media-view { font-size: 9px; color: #8faaa9; margin-top: 10px; display: flex; justify-content: space-between; }
[data-mode="3d"] .media-board:after { content: ''; position: absolute; width: 1px; height: 40px; left: 50%; top: 100%; background: linear-gradient(#82b8b5,transparent); }
[data-mode="3d"] .branch-entrances { position: fixed; inset: 0; z-index: 2; pointer-events: none; }
[data-mode="3d"] .branch-entrance { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
[data-mode="3d"] .branch-wire { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; fill: none; stroke: var(--accent); stroke-width: 1.3; filter: drop-shadow(0 0 5px #eac88366); }
[data-mode="3d"] .branch-wire circle { fill: var(--accent); stroke: none; }
[data-mode="3d"] .branch-sign { position: absolute; left: 0; top: 0; width: 208px; padding: 12px 14px 6px; transform-origin: top left; background: #0a2027f5; border: 1px solid #eac88377; box-shadow: 0 10px 32px #0005; }
[data-mode="3d"] .branch-sign-title { color: var(--accent); font-size: 8px; letter-spacing: 1.8px; margin: 0 0 8px; display: flex; gap: 8px; align-items: center; }
[data-mode="3d"] .branch-sign-title:before { content: ''; width: 5px; height: 5px; border: 1px solid var(--accent); }
[data-mode="3d"] .branch-sign a { display: flex; justify-content: space-between; gap: 8px; align-items: center; min-height: 33px; padding: 7px 0; border-top: 1px solid var(--line); font-size: 11px; line-height: 1.4; color: #d4e0da; }
[data-mode="3d"] .branch-sign a:hover { color: var(--accent); }
[data-mode="3d"] .branch-sign a span:last-child { color: var(--accent); }
[data-mode="3d"] .branch-entrance[aria-hidden=true] a { pointer-events: none; }
[data-mode="3d"] .no-webgl .branch-entrances { display: none; }
[data-mode="3d"] .no-webgl #chip-scene { background: radial-gradient(ellipse at 70% 55%,#1c5356,transparent 55%),repeating-linear-gradient(135deg,transparent 0 40px,#24444844 41px 42px); }
html[lang=hy][data-mode="3d"] h1 { font-size: clamp(27px,2.7vw,39px); letter-spacing: -1px; line-height: 1.16; }
html[lang=hy][data-mode="3d"] body[data-route-kind=loop] h1 { font-size: clamp(26px,2.4vw,35px); }
html[lang=hy][data-mode="3d"] .eyebrow { letter-spacing: .6px; }
@media(max-height:760px) and (min-width:761px) {
[data-mode="3d"] .reading-panel { top: 12px; }
[data-mode="3d"] .breadcrumbs { margin-bottom: 13px; }
[data-mode="3d"] .eyebrow { margin-bottom: 16px; }
[data-mode="3d"] h1 { font-size: 46px; margin-bottom: 16px; }
[data-mode="3d"] .panel-intro { margin-bottom: 16px; }
[data-mode="3d"] .route-options { margin-bottom: 17px; }
[data-mode="3d"] .route-options a { min-height: 36px; padding-block: 7px; }
[data-mode="3d"] .loop-status { margin-bottom: 15px; }
}
@media(max-width:760px) {
[data-mode="3d"] .scene-shade { background: linear-gradient(0deg,#071419 0%,#071419f5 13%,#071419d9 34%,#07141944 57%,transparent 76%,#07141988 100%); }
[data-mode="3d"] .reading-panel { left: 6%; top: auto; bottom: 155px; width: 88%; }
[data-mode="3d"] .breadcrumbs { font-size: 8px; gap: 5px; margin-bottom: 10px; line-height: 1.4; }
[data-mode="3d"] .eyebrow { font-size: 7px; letter-spacing: 1px; margin-bottom: 12px; }
[data-mode="3d"] h1, [data-mode="3d"] body[data-route-kind=loop] h1 { font-size: 33px; letter-spacing: -1.3px; margin-bottom: 12px; max-width: 350px; }
[data-mode="3d"] .panel-intro { font-size: 10px; line-height: 1.65; margin-bottom: 13px; max-width: 340px; }
[data-mode="3d"] .intro-tags { margin: 13px 0 19px; }
[data-mode="3d"] .intro-tags span { font-size: 8px; padding: 5px 7px; }
[data-mode="3d"] .route-options-label { font-size: 7px; letter-spacing: 1px; margin-bottom: 5px; }
[data-mode="3d"] .route-options { display: grid; grid-template-columns: 1fr 1fr; column-gap: 14px; max-width: none; margin-bottom: 14px; }
[data-mode="3d"] .route-options a { min-height: 36px; font-size: 10px; gap: 7px; padding-block: 7px; }
[data-mode="3d"] .route-options a:last-child { border-bottom: 0; }
[data-mode="3d"] .option-number { font-size: 7px; }
[data-mode="3d"] .panel-items { display: flex; flex-wrap: wrap; gap: 6px 13px; margin-bottom: 15px; }
[data-mode="3d"] .panel-item { border: 0; padding: 3px 0; font-size: 10px; gap: 6px; }
[data-mode="3d"] .loop-status { font-size: 9px; margin-bottom: 13px; }
[data-mode="3d"] .loop-status small { font-size: 7px; }
[data-mode="3d"] .primary-action { font-size: 9px; padding: 10px 13px; min-height: 39px; gap: 15px; }
[data-mode="3d"] .previous { width: 39px; height: 39px; }
[data-mode="3d"] .prototype-note { font-size: 6px; margin-top: 10px; }
[data-mode="3d"] .travel-status { right: 6%; top: 13px; width: 155px; font-size: 7px; gap: 8px 15px; }
[data-mode="3d"] .scroll-cue { bottom: 108px; left: 6%; right: 6%; font-size: 9px; }
[data-mode="3d"] .key-hint { display: none; }
[data-mode="3d"] .media-board { width: 300px; }
[data-mode="3d"] .branch-sign { width: 176px; padding: 9px 11px 5px; }
[data-mode="3d"] .branch-sign a { font-size: 11px; min-height: 34px; padding: 7px 0; }
[data-mode="3d"] .branch-sign-title { font-size: 8px; letter-spacing: 1px; }
html[lang=hy][data-mode="3d"] h1, html[lang=hy][data-mode="3d"] body[data-route-kind=loop] h1 { font-size: 25px; }
html[lang=hy][data-mode="3d"] .route-options a { font-size: 9px; }
html[lang=hy][data-mode="3d"] .breadcrumbs { font-size: 7px; }
}
@media(max-height:680px) and (max-width:760px) {
[data-mode="3d"] .reading-panel { bottom: 127px; }
[data-mode="3d"] .breadcrumbs { margin-bottom: 7px; }
[data-mode="3d"] .eyebrow { display: none; }
[data-mode="3d"] h1, [data-mode="3d"] body[data-route-kind=loop] h1 { font-size: 28px; }
[data-mode="3d"] .panel-intro { margin-bottom: 8px; }
[data-mode="3d"] .intro-tags { display: none; }
[data-mode="3d"] .route-options { margin-bottom: 9px; }
[data-mode="3d"] .route-options a { min-height: 31px; }
[data-mode="3d"] .route-options-label, [data-mode="3d"] .prototype-note { display: none; }
[data-mode="3d"] .scroll-cue { bottom: 88px; }
[data-mode="3d"] .loop-status { margin-bottom: 10px; }
}
[data-mode="3d"] body.still-view .section-card { transition: none; transform: none; }
[data-mode="3d"] body.still-view .reading-panel { transition: none; }

/* ▸DUAL a long section card (5+ side paths) would collide with the scroll hint */
[data-mode="3d"] body[data-long-card=true] .scroll-cue{opacity:0}

/* ▸DUAL finale: partner & supporter names above their bond pads */
[data-mode="3d"] .finale-pads{position:fixed;inset:0;pointer-events:none;z-index:2;opacity:0;visibility:hidden}
[data-mode="3d"] .fp-title{position:absolute;left:0;top:0;width:min(420px,80vw);text-align:center;pointer-events:none}
[data-mode="3d"] .fp-kicker{display:block;font-size:8px;letter-spacing:2px;color:var(--accent)}
[data-mode="3d"] .fp-title strong{display:block;margin-top:6px;font-size:22px;font-weight:400;letter-spacing:-.5px}
[data-mode="3d"] .fp-title small{display:block;margin-top:6px;font-size:10px;line-height:1.5;color:var(--muted)}
[data-mode="3d"] .fp-pad{position:absolute;left:0;top:0;display:flex;flex-direction:column;align-items:center;gap:2px;padding:5px 8px;border:1px solid #eac88355;background:#0a2027e6;pointer-events:auto;white-space:nowrap;transition:border-color .25s}
[data-mode="3d"] .fp-pad.is-high{margin-top:-34px}
[data-mode="3d"] .fp-pad:hover{border-color:var(--accent)}
[data-mode="3d"] .fp-pad span{font-size:10px;color:#e8dcc0}
[data-mode="3d"] .fp-pad em{font-style:normal;font-size:7px;letter-spacing:1.2px;color:#8faaa9}
[data-mode="3d"] .fp-pad i{position:absolute;left:50%;top:100%;width:1px;height:12px;background:linear-gradient(#eac883,transparent)}
[data-mode="3d"] .fp-pad.is-high i{height:46px}
@media(max-width:760px){[data-mode="3d"] .fp-pad span{font-size:9px}[data-mode="3d"] .fp-title small{display:none}}

/* ▸MEMORY upcoming-event tags on the path and the memory board */
[data-mode="3d"] .event-layer{position:fixed;inset:0;pointer-events:none;z-index:2}
[data-mode="3d"] .event-layer>*{visibility:hidden}
[data-mode="3d"] .ev-tag{position:absolute;left:0;top:0;display:flex;flex-direction:column;gap:2px;padding:6px 9px;border:1px solid #eac88366;background:#0a2027e8;white-space:nowrap;transform-origin:50% 100%}
[data-mode="3d"] .ev-tag .d{font-size:8px;letter-spacing:1.2px;color:var(--accent)}
[data-mode="3d"] .ev-tag .t{font-size:11px;color:#e8dcc0}
[data-mode="3d"] .ev-tag i{position:absolute;left:50%;top:100%;width:1px;height:14px;background:linear-gradient(#eac883,transparent)}
[data-mode="3d"] .mem-board{position:absolute;left:0;top:0;width:210px;padding:12px 14px;border:1px solid color-mix(in srgb,var(--mem,#eac883) 50%,transparent);background:#0a2027f0;transform-origin:50% 100%}
[data-mode="3d"] .mb-kicker{margin:0;font-size:8px;letter-spacing:1.6px;color:var(--accent)}
[data-mode="3d"] .mem-board strong{display:block;margin-top:6px;font-size:18px;font-weight:400}
[data-mode="3d"] .mb-bits{display:grid;grid-template-columns:repeat(8,1fr);gap:3px;margin-top:10px}
[data-mode="3d"] .mb-bits i{height:8px;border:1px solid #a1cbcc26;background:#0b1c22}
[data-mode="3d"] .mb-bits i.on{background:var(--mem,#eac883);border-color:var(--mem,#f3d695);box-shadow:0 0 6px var(--mem,#eac883)}
[data-mode="3d"] .mem-board .mb-kicker{color:var(--mem,var(--accent))}
[data-mode="3d"] .mem-board button{color:var(--mem,var(--accent))}
[data-mode="3d"] .mem-board button{margin-top:10px;width:100%;border:1px solid #eac88366;background:none;color:var(--accent);padding:8px;font-size:11px;text-align:left}
[data-mode="3d"] .mem-board button:hover{background:#eac88314}

/* ▸free contacts in the finale: dashed, inviting */
[data-mode="3d"] .fp-pad.is-free{border-style:dashed;background:#0a2027cc}
[data-mode="3d"] .fp-pad.is-free span{color:var(--accent)}
[data-mode="3d"] .fp-pad.is-free.is-supporter{border-color:#e2a27a88}
[data-mode="3d"] .fp-pad.is-free.is-supporter span{color:#e2a27a}

/* product boards along a path: text first, click to open large */
[data-mode="3d"] .show-board { width: 330px; pointer-events: auto; }
[data-mode="3d"] .show-board .sb-card { display: flex; flex-direction: column; gap: 8px; width: 100%; padding: 16px 18px 15px; text-align: left; color: var(--ink, #f1eee6); border: 1px solid #98ceca66; background: #0a2228f5; box-shadow: 0 15px 45px #0005; cursor: pointer; transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .3s; transform-origin: 50% 100%; }
[data-mode="3d"] .show-board.is-hover .sb-card { transform: scale(1.08); border-color: var(--accent); }
[data-mode="3d"] .show-board.is-hover { z-index: 2000 !important; }
[data-mode="3d"] .sb-kicker { font-size: 8px; letter-spacing: 1.5px; color: var(--accent); }
[data-mode="3d"] .show-board strong { font-size: 19px; font-weight: 400; line-height: 1.25; }
[data-mode="3d"] .sb-intro { margin: 0; font-size: 12px; line-height: 1.55; color: #c9d8d7; }
[data-mode="3d"] .sb-thumbs { display: flex; gap: 6px; margin-top: 4px; }
[data-mode="3d"] .sb-thumbs img { width: 62px; height: 40px; object-fit: cover; object-position: top left; border: 1px solid #a1cbcc44; opacity: .85; }
[data-mode="3d"] .sb-more { margin-top: 2px; font-size: 10px; letter-spacing: .4px; color: var(--accent); }
@media (max-width: 760px) { [data-mode="3d"] .show-board { width: 260px; } }
[data-mode="3d"] .panel-text { font-size: 11.5px; line-height: 1.75; max-width: 340px; color: var(--muted); margin: -8px 0 14px; }

/* phones: the paths in one swipeable row, and a path's longer text behind "Read more" */
[data-mode="3d"] .panel-more-toggle { display: none; }
@media (max-width: 760px) {
 [data-mode="3d"] .route-options { display: flex; flex-wrap: nowrap; gap: 8px; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x proximity; margin: 0 -6% 12px 0; padding: 2px 6% 4px 0; scrollbar-width: none; }
 [data-mode="3d"] .route-options::-webkit-scrollbar { display: none; }
 [data-mode="3d"] .route-options a, [data-mode="3d"] .route-options a:last-child { flex: 0 0 auto; max-width: 64vw; min-height: 0; padding: 8px 12px; border: 1px solid #98ceca55; border-radius: 999px; background: #0a2228d9; scroll-snap-align: start; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 11px; }
 [data-mode="3d"] .route-options a > span:nth-child(2) { overflow: hidden; text-overflow: ellipsis; }
 [data-mode="3d"] .option-symbol { font-size: 12px; margin-left: 4px; }
 [data-mode="3d"] .route-options-label { display: block !important; }
 [data-mode="3d"] .panel-more { display: none; }
 [data-mode="3d"] .is-more .panel-more { display: block; max-height: 24vh; overflow: auto; padding-right: 4px; -webkit-mask: linear-gradient(#000 85%,transparent); mask: linear-gradient(#000 85%,transparent); }
 [data-mode="3d"] .section-card.is-more::before { content: ''; position: absolute; z-index: -1; inset: -14px -4% -10px; background: #071a1fe8; border-radius: 12px; }
 body:has(.is-more) .show-board { opacity: 0 !important; pointer-events: none; }
 [data-mode="3d"] .panel-more-toggle { display: inline-block; margin: -4px 0 12px; padding: 0; border: 0; background: none; color: var(--accent); font-size: 11px; }
 [data-mode="3d"] .panel-text { font-size: 10.5px; margin: 0 0 10px; }
}

/* section names on the gates */
[data-mode="3d"] .gate-name{position:absolute;left:0;top:0;display:flex;align-items:baseline;gap:10px;padding:6px 16px 7px;white-space:nowrap;border:1px solid #eac88366;background:#0a2228d9;color:#f1eee6;transform-origin:50% 50%;will-change:transform,opacity}
[data-mode="3d"] .gate-name strong{font-size:22px;font-weight:400;letter-spacing:.5px}
[data-mode="3d"] .gate-name .gn-num{font-size:11px;letter-spacing:1.5px;color:#eac883}

/* a long path text stays behind "Read more" on large screens too */
[data-mode="3d"] .has-long .panel-more-toggle { display: inline-block; margin: -4px 0 14px; padding: 0; border: 0; background: none; color: var(--accent); font-size: 11px; cursor: pointer; }
[data-mode="3d"] .has-long:not(.is-more) .panel-more { display: none; }
[data-mode="3d"] .has-long.is-more .panel-more { max-height: 36vh; overflow: auto; padding-right: 6px; }

/* large screens: a long list of paths scrolls in a fixed height, so the buttons stay above the bottom bar */
@media (min-width: 761px) {
 [data-mode="3d"] .route-options { max-height: clamp(130px, calc(100vh - 560px), 300px); overflow-y: auto; overscroll-behavior: contain; padding-right: 6px; scrollbar-width: thin; scrollbar-color: #4d6b6b transparent; }
 [data-mode="3d"] .route-options a:last-child { border-bottom: 0; }
 [data-mode="3d"] .has-long.is-more .panel-more { overscroll-behavior: contain; }
}
/* phones: a lighter panel inside a path */
@media (max-width: 760px) {
 [data-mode="3d"] .loop-status { display: none; }
 [data-mode="3d"] .primary-action { gap: 8px; min-height: 0; padding: 7px 11px; font-size: 10px; }
 [data-mode="3d"] .panel-actions .previous { width: 34px; height: 34px; min-height: 0; }
 [data-mode="3d"] body[data-route-kind=loop] h1 { font-size: 25px; margin-bottom: 8px; }
 [data-mode="3d"] body[data-long-card=true] .reading-panel { bottom: 92px; }
}
@media (max-width: 760px) { [data-mode="3d"] .panel-links { gap: 6px; margin: 8px 0 8px; } [data-mode="3d"] .panel-links a { padding: 5px 10px; font-size: 10.5px; } }
@media (min-width: 761px) and (max-height: 900px) { [data-mode="3d"] .prototype-note { display: none; } }

/* the middle sections have no scroll hint; the buttons have a fixed place, so the small copyright line is not shown here */
[data-mode="3d"] body[data-cue-text="0"] .scroll-cue .scroll-icon, [data-mode="3d"] body[data-cue-text="0"] #scroll-hint { display: none; }
@media (min-width: 761px) { [data-mode="3d"] .prototype-note { display: none; } }
@media (max-width: 760px) { [data-mode="3d"] body[data-cue-text="0"] .reading-panel { bottom: 92px; } }

/* no "Read more": a path's text always shows, scrolling inside a fixed height */
[data-mode="3d"] .panel-more, [data-mode="3d"] .has-long:not(.is-more) .panel-more { display: block; overflow-y: auto; overscroll-behavior: contain; padding-right: 6px; scrollbar-width: thin; scrollbar-color: #4d6b6b transparent; }
[data-mode="3d"] .panel-more-toggle, [data-mode="3d"] .has-long .panel-more-toggle { display: none; }
@media (max-width: 760px) { [data-mode="3d"] .panel-more { display: block; max-height: 18vh; margin-bottom: 10px; -webkit-mask: linear-gradient(#000 85%,transparent); mask: linear-gradient(#000 85%,transparent); } }
[data-mode="3d"] .panel-more { margin: 0 0 16px; }
[data-mode="3d"] .panel-more .panel-text { margin: 0 0 10px; }
[data-mode="3d"] .panel-more .panel-text:last-child { margin-bottom: 0; }

[data-mode="3d"] .gate-layer { z-index: 1; }
[data-mode="3d"] .scene-media { z-index: 2; }
@media (max-width: 760px) { [data-mode="3d"] .show-board { width: 230px; } [data-mode="3d"] .show-board strong { font-size: 16px; } }
[data-mode="3d"] .panel-next { display: flex; flex-direction: column; gap: 3px; max-width: 340px; margin: 0 0 16px; padding: 10px 12px; border-left: 2px solid var(--accent); background: #0a2228aa; font-size: 11px; color: #a9c0c0; }
[data-mode="3d"] .panel-next strong { color: #f1eee6; font-weight: 400; font-size: 13px; }