/* Era Museum: halls, lobby, timeline, colophon and the primitives shared by the four exhibits.
   Same tokens as site.css (era colours come from data-era / data-era-of). No inline styles, no external requests. */

.museum { max-width: var(--wrap); margin: 0 auto; padding: clamp(16px, 3vw, 36px) var(--gutter) 0; }
.museum .crumbs { margin-bottom: 18px; }
.museum .crumbs span[aria-current] { color: var(--ink-2); }

/* page head: text + a framed era still */
.m-head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(20px, 4vw, 52px); align-items: center; padding-bottom: clamp(24px, 4vw, 48px); }
.m-head-lobby { grid-template-columns: minmax(0, 52rem); }
.m-head .lede { margin-top: 14px; }
.m-head h1 { margin: 6px 0 0; text-wrap: balance; }
.m-fig { margin: 0; padding: 10px; border-radius: var(--r-l); background: linear-gradient(180deg, #17151c, #0a090c); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), 0 30px 60px -30px rgba(0, 0, 0, .9), 0 0 80px -40px var(--c, var(--era)); }
.m-fig img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 10px; background: #000; }
.m-fig figcaption { padding: 8px 4px 2px; font: 500 .7rem var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }
.m-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 0; }
.m-progress { margin: 18px 0 0; font: 500 .8rem var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }

/* hall layout */
.m-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.m-toc { position: sticky; top: 16px; padding: 14px 16px; border: 1px solid var(--rule); border-radius: var(--r-m); background: var(--room-2); }
.m-toc-title { margin: 0 0 8px; font: 500 .7rem var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.m-toc ol { margin: 0; padding: 0; list-style: none; counter-reset: toc; }
.m-toc li { counter-increment: toc; }
.m-toc a { display: flex; gap: 10px; align-items: baseline; min-height: 36px; padding: 6px 0; color: var(--ink-2); text-decoration: none; font: 500 .95rem/1.25 var(--f-display); letter-spacing: .02em; }
.m-toc a::before { content: counter(toc, decimal-leading-zero); font: 400 .72rem var(--f-mono); color: var(--c, var(--era)); }
.m-toc a:hover { color: var(--ink); }

.m-body { min-width: 0; max-width: 46rem; }
.m-body-solo { max-width: 46rem; }
.m-body p, .m-body li { color: var(--ink-2); max-width: 68ch; }
.m-body p { margin: 0 0 1.05em; text-wrap: pretty; }
.m-body em { color: var(--ink); font-style: italic; }
.m-body strong { color: var(--ink); font-weight: 600; }
.m-sec { margin: 0 0 clamp(32px, 5vw, 56px); scroll-margin-top: 16px; }
.m-sec > h2 { margin: 0 0 .6em; padding-top: .2em; font: 700 clamp(1.5rem, 1.2rem + 1.2vw, 2rem)/1.1 var(--f-display); color: var(--ink); }
.m-sec > h2::before { content: ""; display: block; width: 36px; height: 3px; margin-bottom: 12px; border-radius: 2px; background: var(--c, var(--era)); }
.m-sec h3 { margin: 1.7em 0 .45em; font: 700 1.2rem/1.25 var(--f-display); letter-spacing: .01em; color: var(--ink); }
.m-body a { text-decoration-color: color-mix(in srgb, var(--c, var(--era)) 70%, transparent); }
.m-note { padding: 12px 14px; border: 1px solid var(--rule); border-left: 3px solid var(--c, var(--era)); border-radius: 0 var(--r-s) var(--r-s) 0; background: var(--room-2); font-size: .95rem; }
.m-note b { color: var(--ink); }
.m-try { margin: 0 0 clamp(28px, 4vw, 44px); padding: 16px 18px; border: 1px dashed var(--rule-2); border-radius: var(--r-m); }
.m-try-title { margin: 0 0 6px !important; font: 500 .7rem var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--c, var(--era)) !important; }
.m-try ul { margin: 0; padding: 0; list-style: none; }
.m-try li { margin: .35em 0; }
.m-try li a { font: 700 1.05rem var(--f-display); letter-spacing: .02em; }

/* the three ideas */
.m-ideas { margin: 0; padding: 0; list-style: none; counter-reset: idea; }
.m-idea { position: relative; margin: 0 0 16px; padding: 18px 20px 14px 20px; border: 1px solid var(--rule); border-left: 3px solid var(--c, var(--era)); border-radius: 0 var(--r-m) var(--r-m) 0; background: var(--room-2); counter-increment: idea; }
.m-idea h3 { margin: 0 0 .4em; font-size: 1.2rem; }
.m-idea h3::before { content: counter(idea) ". "; color: var(--c, var(--era)); }
.m-idea p { margin: 0 0 .7em; }
.m-idea-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 0 !important; font: 500 .9rem var(--f-display); letter-spacing: .03em; }
.m-idea-btn { min-height: 40px; padding: 0 14px; --era: var(--c); --era-ink: #0a0a0c; font-size: .85rem; }
.m-games { margin: 0 0 1em; padding: 0; list-style: none; }
.m-games li { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; min-height: 44px; padding: 6px 0; border-bottom: 1px solid var(--rule); max-width: 40rem; }
.m-games li > a:first-child { font: 700 1.05rem var(--f-display); letter-spacing: .02em; }
.m-games-meta { font: 400 .72rem var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.m-games-play { margin-left: auto; display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px; border: 1px solid var(--rule-2); border-radius: var(--r-s); font: 700 .8rem var(--f-display); letter-spacing: .08em; text-transform: uppercase; text-decoration: none !important; color: var(--c, var(--era)); }
.m-games-play:hover { background: rgba(241, 235, 223, .06); }
.m-reading { margin: 0 0 1em; padding-left: 1.1em; }
.m-reading li { margin: .5em 0; }
.m-reading li::marker { color: var(--c, var(--era)); }
.m-reading span { color: var(--ink-3); }

/* stamp */
.m-stamp { margin: 0 0 24px; padding: 22px; border: 2px dashed color-mix(in srgb, var(--c, var(--era)) 55%, transparent); border-radius: var(--r-l); background: radial-gradient(120% 120% at 100% 0%, var(--era-glow), transparent 60%), var(--room-2); }
.m-stamp h2 { margin: 0 0 .4em; font: 700 1.5rem var(--f-display); }
.m-stamp-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
.m-stamp .btn { --era: var(--c); --era-ink: #0a0a0c; }
.m-stamp .btn[aria-pressed="true"] { background: transparent; color: var(--c); border-color: var(--c); box-shadow: none; }
.m-stamp-msg { margin: 0 !important; font: 500 .85rem var(--f-mono); letter-spacing: .04em; color: var(--ink-2); }
.m-stamp-links { margin: 14px 0 0 !important; }
.m-corr { font-size: .9rem; color: var(--ink-3) !important; }

/* tour nav */
.m-tour { display: flex; justify-content: space-between; gap: 14px; margin: clamp(28px, 5vw, 56px) 0 0; padding-top: 22px; border-top: 1px solid var(--rule); }
.m-tour a { display: flex; flex-direction: column; gap: 2px; max-width: 48%; min-height: 44px; padding: 10px 14px; border: 1px solid var(--rule-2); border-radius: var(--r-m); text-decoration: none; background: var(--room-2); }
.m-tour a:hover { border-color: var(--era); background: var(--room-3); }
.m-tour-next { margin-left: auto; text-align: right; }
.m-tour-dir { font: 500 .66rem var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.m-tour-name { font: 700 1.1rem/1.15 var(--f-display); }

/* lobby */
.m-section { margin: 0 0 clamp(36px, 6vw, 72px); }
.m-sub { margin: 8px 0 22px; max-width: 60ch; color: var(--ink-2); }
.m-plan { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(12px, 2vw, 20px); margin: 0; padding: 0; list-style: none; }
.m-plan-ex { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.m-room { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 18px 18px 16px; border: 1px solid var(--rule); border-radius: var(--r-m); background: var(--room-2); transition: border-color .2s, background-color .2s; }
.m-room::before { content: ""; position: absolute; inset: 0 0 auto; height: 3px; border-radius: var(--r-m) var(--r-m) 0 0; background: var(--c, var(--era)); }
.m-room:hover { border-color: color-mix(in srgb, var(--c, var(--era)) 45%, transparent); background: var(--room-3); }
.m-room h3 { margin: 0; font: 700 1.4rem/1.1 var(--f-display); }
.m-room h3 a { text-decoration: none; }
.m-room h3 a::after { content: ""; position: absolute; inset: 0; }
.m-room h3 a:focus-visible { outline: none; }
.m-room:has(h3 a:focus-visible) { outline: 2px solid var(--c, var(--era)); outline-offset: 2px; }
.m-room p { margin: 0; color: var(--ink-2); font-size: .97rem; line-height: 1.5; }
.m-room-meta { font: 400 .7rem var(--f-mono) !important; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3) !important; }
.m-room-meta b { font-weight: 500; color: var(--c, var(--era)); }
.m-room-foot { min-height: 1.4em; }
.m-room-stamp { font: 500 .68rem var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--c, var(--era)); border: 1px solid currentColor; border-radius: 4px; padding: 2px 7px; }
.m-about p { max-width: 62ch; color: var(--ink-2); }

/* timeline */
.m-jump { position: sticky; top: 0; z-index: 4; margin: 0 calc(var(--gutter) * -1) 28px; padding: 8px var(--gutter); background: color-mix(in srgb, var(--room) 90%, transparent); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule); }
.m-jump ul { display: flex; gap: 8px; margin: 0; padding: 0; list-style: none; overflow-x: auto; scrollbar-width: none; }
.m-jump ul::-webkit-scrollbar { display: none; }
.m-jump a { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 14px; white-space: nowrap; border: 1px solid var(--rule-2); border-radius: 999px; color: var(--ink-2); text-decoration: none; font: 500 .9rem var(--f-display); letter-spacing: .04em; }
.m-jump a::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--c); }
.m-jump a span { display: none; color: var(--ink-3); }
.m-jump a:hover { color: var(--ink); background: rgba(241, 235, 223, .06); }
.m-era { margin: 0 0 clamp(36px, 6vw, 64px); scroll-margin-top: 70px; }
.m-era h2 { margin: 0; font: 700 clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem)/1.1 var(--f-display); }
.m-era-years { display: block; margin-bottom: 4px; font: 500 .78rem var(--f-mono); letter-spacing: .14em; color: var(--c); }
.m-era-link { margin: 8px 0 18px; }
.m-years { margin: 0; padding: 0; list-style: none; border-left: 2px solid color-mix(in srgb, var(--c) 40%, transparent); }
.m-year { display: grid; grid-template-columns: 4.6rem minmax(0, 1fr); gap: 4px 14px; padding: 0 0 26px 18px; position: relative; scroll-margin-top: 70px; }
.m-year::before { content: ""; position: absolute; left: -7px; top: .55em; width: 12px; height: 12px; border-radius: 50%; background: var(--room); border: 2px solid var(--c); }
.m-year-n { margin: 0; font: 700 1.6rem/1.1 var(--f-display); color: var(--c); letter-spacing: .01em; }
.m-year-body h3 { margin: 0 0 .3em; font: 700 1.2rem/1.2 var(--f-display); }
.m-year-body p { margin: 0 0 .6em; max-width: 62ch; color: var(--ink-2); }
.m-year-games { font: 400 .85rem var(--f-mono); color: var(--ink-3) !important; }

/* ---------- exhibit primitives (used by the four exhibit pages) ---------- */
.ex-intro { max-width: 46rem; }
.ex-intro p { color: var(--ink-2); max-width: 66ch; }
.ex-intro h2 { margin: 1.6em 0 .4em; font: 700 1.4rem var(--f-display); }
.ex-warn { margin: 18px 0; padding: 12px 14px; border: 1px solid color-mix(in srgb, var(--e6) 50%, transparent); border-left: 3px solid var(--e6); border-radius: 0 var(--r-s) var(--r-s) 0; background: var(--room-2); color: var(--ink-2); }
.ex-warn b { color: var(--ink); }
.ex-stage { margin: 26px 0; display: grid; gap: 18px; }
.ex-panel { padding: 16px 18px; border: 1px solid var(--rule); border-radius: var(--r-m); background: var(--room-2); }
.ex-panel > h2, .ex-panel > h3 { margin: 0 0 10px; font: 500 .72rem var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.ex-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 12px 22px; }
.ex-field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.ex-field > label, .ex-label { font: 500 .85rem var(--f-display); letter-spacing: .04em; text-transform: uppercase; color: var(--ink-2); }
.ex-field output { font: 400 .8rem var(--f-mono); color: var(--ink-3); }
.ex-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.ex-field input[type="range"] { width: 100%; min-height: 44px; margin: 0; accent-color: var(--era); background: transparent; cursor: pointer; }
.ex-field select { width: 100%; }
.ex-field select, .ex-field input[type="text"], .ex-field input[type="tel"], .ex-field input[type="number"] { min-height: 44px; padding: 0 12px; border: 1px solid var(--rule-2); border-radius: var(--r-s); background: var(--room); color: var(--ink); font: 500 1rem var(--f-mono); }
.ex-field input[type="color"] { width: 64px; min-height: 44px; padding: 3px; border: 1px solid var(--rule-2); border-radius: var(--r-s); background: var(--room); cursor: pointer; }
.ex-field select:focus, .ex-field input:focus { outline: 2px solid var(--era); outline-offset: 2px; }
.ex-switch { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; cursor: pointer; color: var(--ink-2); font: 500 .95rem var(--f-display); letter-spacing: .03em; }
.ex-switch input { width: 20px; height: 20px; accent-color: var(--era); }
.btn-sm { min-height: 44px; padding: 0 14px; font-size: .85rem; }
.ex-status { margin: 0; min-height: 1.5em; font: 400 .85rem var(--f-mono); color: var(--ink-2); }
.ex-canvas { display: block; width: 100%; height: auto; background: #000; border-radius: 10px; }
.ex-frame { margin: 0; padding: 12px; border-radius: var(--r-l); background: linear-gradient(180deg, #17151c, #0a090c); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), 0 30px 60px -30px rgba(0, 0, 0, .9); }
.ex-frame figcaption { padding: 8px 4px 0; color: var(--ink-3); font-size: .85rem; }
.ex-details { margin: 18px 0; border: 1px solid var(--rule); border-radius: var(--r-m); background: var(--room-2); }
.ex-details summary { min-height: 44px; display: flex; align-items: center; padding: 0 16px; cursor: pointer; font: 700 1rem var(--f-display); letter-spacing: .04em; }
.ex-details > div { padding: 0 18px 14px; }
.ex-details p, .ex-details li { color: var(--ink-2); }
.swatch-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; }
.swatch-list li { display: flex; align-items: center; gap: 8px; min-height: 36px; font: 400 .78rem var(--f-mono); color: var(--ink-2); }
.swatch { flex: none; width: 28px; height: 28px; border-radius: 4px; border: 1px solid var(--rule-2); }

@media (max-width: 1000px) {
  .m-plan { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .m-plan-ex { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .m-head { grid-template-columns: 1fr; }
  .m-layout { grid-template-columns: 1fr; gap: 20px; }
  .m-toc { position: static; }
  .m-toc ol { display: flex; flex-wrap: wrap; gap: 0 18px; }
  .m-jump a span { display: inline; }
}
@media (max-width: 560px) {
  .m-plan, .m-plan-ex { grid-template-columns: 1fr; }
  .m-year { grid-template-columns: 1fr; padding-left: 16px; }
  .m-year-n { font-size: 1.35rem; }
  .m-tour { flex-direction: column; }
  .m-tour a { max-width: none; }
  .m-tour-next { margin-left: 0; text-align: left; }
  .m-games-play { margin-left: 0; }
  .m-jump a span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .m-room, .m-tour a { transition: none; }
}