.walkthrough-library, .walkthrough-tour, .walkthrough-finish { color: var(--paper); background: var(--ink); }
.sheet-walkthrough, .sheet-walkthrough-tour { height: min(920px, calc(100dvh - var(--safe-top))); }
.sheet-walkthrough .sheet-scroll, .sheet-walkthrough-tour .sheet-scroll { padding-bottom: 0; overflow-x: hidden; overscroll-behavior: contain; }
.walkthrough-library { padding: 24px clamp(18px, 5vw, 36px) 32px; }
.walkthrough-intro { padding: 8px 0 28px; }
.walkthrough-intro > span { display: block; margin-bottom: 22px; color: var(--gold); }
.walkthrough-intro > span .icon { width: 30px; height: 30px; }
.walkthrough-intro small, .walkthrough-story > small, .walkthrough-cover-copy > small, .walkthrough-finish > small { color: var(--gold); font-size: 11px; font-weight: 700; letter-spacing: .12em; line-height: 1.5; }
.walkthrough-intro h3, .walkthrough-finish h3 { margin: 12px 0 16px; font: 400 clamp(34px, 8vw, 52px)/1.07 var(--display); letter-spacing: -.02em; }
.walkthrough-intro h3 i, .walkthrough-finish h3 i { font-weight: 400; }
.walkthrough-intro p, .walkthrough-finish > p { max-width: 50ch; margin: 0; color: var(--paper-soft); font-size: 14px; line-height: 1.7; }
.walkthrough-collection { display: grid; gap: 28px; }
.walkthrough-cover { display: block; width: 100%; padding: 0 0 25px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: inherit; text-align: left; }
.walkthrough-cover-art { position: relative; display: block; aspect-ratio: 1.85; overflow: hidden; background: var(--ink-soft); border-radius: 3px; }
.walkthrough-cover-image { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.walkthrough-cover-art > b { position: absolute; top: 12px; left: 12px; padding: 8px 10px; background: #111c; color: #f5eddf; font: 400 18px var(--serif); }
.walkthrough-cover-copy { display: block; padding-top: 16px; }
.walkthrough-cover-copy > strong { display: block; margin: 7px 0 9px; font: 400 26px/1.18 var(--display); }
.walkthrough-cover-copy > em { display: block; max-width: 55ch; color: var(--paper-soft); font-size: 14px; font-style: normal; line-height: 1.6; }
.walkthrough-cover-copy > span { display: flex; min-height: 44px; margin-top: 8px; align-items: center; gap: 10px; color: var(--gold); font-size: 13px; font-weight: 600; }
.walkthrough-library .walkthrough-disclosure, .walkthrough-finish .walkthrough-disclosure { margin: 22px 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.walkthrough-tour-bar { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 18px 22px 0; font-size: 13px; }
.walkthrough-tour-bar > b { flex-shrink: 0; color: var(--gold); font-size: 12px; }
.walkthrough-progress { display: flex; padding: 0 20px; gap: 5px; }
.walkthrough-progress > button { flex: 1; min-height: 44px; padding: 0; border: 0; background: none; }
.walkthrough-progress > button > span { display: block; height: 2px; background: var(--line-strong); }
.walkthrough-progress > button.seen > span { background: var(--gold); }
.walkthrough-progress > button[aria-current] > span { height: 4px; }
.walkthrough-scene { margin: 0; }
.walkthrough-scene > button { position: relative; display: block; width: 100%; padding: 0; border: 0; aspect-ratio: 1.45; overflow: hidden; background: var(--ink-raised); }
.walkthrough-scene-image { display: block; width: 100%; height: 100%; object-fit: cover; animation: walkSceneReveal .38s ease-out both; }
.walkthrough-scene > button > span { position: absolute; right: 14px; bottom: 14px; display: flex; align-items: center; gap: 7px; min-height: 36px; padding: 7px 12px; border-radius: 30px; color: #fff6e9; background: #121511db; font-size: 12px; }
.walkthrough-scene figcaption { padding: 12px 22px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.walkthrough-story { padding: 22px; }
.walkthrough-story h3 { margin: 8px 0 12px; font: 400 clamp(29px, 6vw, 40px)/1.14 var(--display); overflow-wrap: anywhere; }
.walkthrough-story p { margin: 0; color: var(--paper-soft); font-size: 15px; line-height: 1.65; }
.walkthrough-story .button { width: 100%; margin-top: 20px; min-height: 48px; font-size: 12px; }
.walkthrough-access { display: flex; align-items: center; gap: 9px; margin-top: 18px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.walkthrough-access .icon { flex-shrink: 0; }
.walkthrough-map, .walkthrough-orientation { margin: 0 22px; padding: 16px 0; border-block: 1px solid var(--line); }
.walkthrough-map summary, .walkthrough-stop-list summary { display: flex; min-height: 44px; align-items: center; gap: 10px; cursor: pointer; font-size: 13px; line-height: 1.5; list-style: none; }
.walkthrough-map summary::-webkit-details-marker, .walkthrough-stop-list summary::-webkit-details-marker { display: none; }
.walkthrough-map summary span { flex: 1; }
.walkthrough-mini-plan { position: relative; width: min(100%, 380px); aspect-ratio: 1; margin: 8px auto; overflow: hidden; background: #101714; border-radius: 8px; }
.walkthrough-mini-plan .atlas-plan-art { width: 100%; height: 100%; }
.walkthrough-pin { position: absolute; width: 30px; height: 30px; display: grid; place-items: center; transform: translate(-50%, -50%); color: #15120e; background: #e4d4a8; border-radius: 50%; box-shadow: 0 0 0 6px #e4d4a820; }
.walkthrough-map p, .walkthrough-orientation p { color: var(--paper-soft); font-size: 13px; line-height: 1.65; }
.walkthrough-orientation { display: flex; gap: 12px; }
.walkthrough-orientation > span { color: var(--gold); }
.walkthrough-orientation small { display: block; color: var(--gold); font-size: 10px; letter-spacing: .12em; }
.walkthrough-orientation strong { display: block; margin-top: 8px; font-size: 15px; }
.walkthrough-access-toggle { display: flex; width: calc(100% - 44px); margin: 10px 22px; padding: 14px 0; align-items: center; gap: 10px; min-height: 48px; border: 0; background: none; color: var(--paper-soft); text-align: left; font-size: 13px; }
.walkthrough-access-toggle > span { flex: 1; }
.walkthrough-access-toggle b { color: var(--gold); }
.walkthrough-stop-list { margin: 0 22px 24px; }
.walkthrough-stop-list summary { justify-content: space-between; }
.walkthrough-stop-list button { display: flex; align-items: center; gap: 14px; width: 100%; padding: 15px 0; min-height: 48px; text-align: left; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--paper-soft); }
.walkthrough-stop-list button > span { color: var(--gold); font-size: 12px; }
.walkthrough-stop-list button > strong { flex: 1; font-size: 14px; font-weight: 500; }
.walkthrough-stop-list button[aria-current] > strong { color: var(--gold); }
.walkthrough-controls { position: sticky; bottom: 0; z-index: 4; display: grid; grid-template-columns: .8fr 1.2fr; gap: 10px; padding: 14px 18px max(14px, var(--safe-bottom)); border-top: 1px solid var(--line); background: var(--ink); }
.walkthrough-controls .button { min-height: 48px; font-size: 12px; letter-spacing: .025em; }
.walkthrough-finish { padding: 38px 24px; min-height: 100%; text-align: center; }
.walkthrough-fan { margin: 8px auto 32px; animation: walkStamp .8s cubic-bezier(.2,.7,.2,1) both; }
.walkthrough-finish > p { margin-inline: auto; }
.walkthrough-finish-strip { display: flex; gap: 6px; height: 100px; margin: 26px 0; overflow: hidden; }
.walkthrough-finish-image { width: 0; flex: 1; height: 100%; object-fit: cover; }
.walkthrough-finish .button { width: 100%; margin-top: 10px; min-height: 48px; font-size: 12px; }
:is(.walkthrough-library, .walkthrough-tour, .walkthrough-finish) :is(button, summary):focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
@media (hover: hover) { .walkthrough-cover:hover .walkthrough-cover-image { transform: scale(1.025); } }
@media (min-width: 700px) { .walkthrough-scene > button { aspect-ratio: 2; } .walkthrough-cover { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; } .walkthrough-cover-art { aspect-ratio: 1.2; } .walkthrough-cover-copy { padding: 0; } }
@media (max-width: 360px) { .walkthrough-tour-bar, .walkthrough-story { padding-inline: 18px; } .walkthrough-controls { padding-inline: 12px; } }
@keyframes walkSceneReveal { from { opacity: .75; transform: scale(1.015); } to { opacity: 1; transform: scale(1); } }
@keyframes walkStamp { from { opacity: 0; transform: translateY(10px) scale(.92); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .walkthrough-scene-image, .walkthrough-fan { animation: none; } .walkthrough-cover-image { transition: none; } }
.reduce-motion .walkthrough-scene-image, .reduce-motion .walkthrough-fan { animation: none; }