/* Nightfall — page skeleton. Task 3 core; sections filled in Tasks 4-7. */

/* ---- ground ---- */
html { scroll-behavior:smooth; }
body { background:var(--night); color:var(--cream); font:15.5px/1.8 var(--sans); margin:0; }
img { max-width:100%; display:block; }
.lbl { font:500 10.5px var(--sans); letter-spacing:.3em; text-transform:uppercase; }
.lbl-brass { color:var(--brass); } .lbl-dim { color:var(--cream-dim); }
.measure { max-width:58ch; color:rgba(242,237,227,.88); }
.sect { padding:3rem clamp(1.2rem,5vw,3.4rem); }
.sect h3 { font:500 var(--text-section) var(--serif); margin:0 0 .8rem; }
.hairtop { border-top:1px solid var(--hairline); }
:where(a,button,[tabindex]):focus-visible { outline:var(--focus-ring); outline-offset:4px; }
.skip { position:absolute; left:-9999px; } .skip:focus { left:1rem; top:1rem; z-index:99; color:var(--night); background:var(--brass); padding:.6rem 1rem; }

/* ---- nav ---- */
.nav { position:fixed; inset:0 0 auto 0; z-index:70; display:flex; align-items:center; gap:1.6rem;
  padding:1.05rem clamp(1rem,4vw,2.6rem); transition:var(--transition);
  padding-inline:max(clamp(1rem,4vw,2.6rem), env(safe-area-inset-left)) ; }
.nav.scrolled { background:rgba(10,17,30,.92); backdrop-filter:blur(8px); border-bottom:1px solid var(--hairline); padding-block:.7rem; }
.wordmark { font:500 15px var(--serif); letter-spacing:.22em; text-transform:uppercase; color:var(--cream); text-decoration:none; white-space:nowrap; }
@media (max-width:374px) { .wordmark { font-size:13px; letter-spacing:.16em; } }
.chapter-links { display:flex; gap:1.4rem; margin-left:auto; }
.chapter-link { font:500 11px var(--sans); letter-spacing:.18em; text-transform:uppercase; color:var(--cream-dim);
  text-decoration:none; padding-bottom:3px; border-bottom:1px solid transparent; }
.chapter-link.on { color:var(--cream); border-bottom-color:var(--brass); }
.ghost { display:inline-block; border:1px solid var(--brass); color:var(--brass); padding:.9rem 2.2rem;
  font:500 11px var(--sans); letter-spacing:.26em; text-transform:uppercase; text-decoration:none; background:transparent; }
.nav .ghost { padding:.55rem 1.1rem; font-size:10.5px; }

/* ---- hero ---- */
.hero { position:relative; height:100svh; min-height:560px; overflow:hidden; }
.hero .media { position:absolute; inset:0; }
.hero .media img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.hero .media iframe { position:absolute; top:50%; left:50%; width:100vw; height:56.25vw;
  min-height:100svh; min-width:177.78vh; transform:translate(-50%,-50%); border:0; pointer-events:none; }
.hero .veil { position:absolute; inset:0; background:linear-gradient(180deg,rgba(10,17,30,.6),rgba(10,17,30,.1) 45%,rgba(10,17,30,.94)); }
.hero .txt { position:absolute; inset:auto 0 0 0; text-align:center; padding:0 1rem 3.4rem; }
.hero h1 { font:500 var(--text-display) var(--serif); line-height:.98; margin:.55rem 0 .6rem; }
.hero .sub { color:var(--cream-dim); font-size:1.08rem; margin:0 0 1.7rem; }
.scrollcue { margin-top:2rem; color:var(--cream-dim); font:500 11px var(--sans); letter-spacing:.3em; text-transform:uppercase; }

/* ---- chapters + rail ---- */
.chapter { display:grid; grid-template-columns:110px 1fr; }
.rail { border-right:1px solid var(--hairline); }
.rail-in { position:sticky; top:0; min-height:60vh; padding:2rem 0; display:flex; flex-direction:column; align-items:center; gap:1rem; }
.rail-num { color:var(--brass); font:500 12px var(--sans); letter-spacing:.14em; }
.rail-line { width:1px; flex:1; min-height:80px; max-height:180px; background:linear-gradient(180deg,var(--brass),transparent); }
.rail-name { writing-mode:vertical-rl; font:500 10.5px var(--sans); letter-spacing:.34em; text-transform:uppercase; color:var(--cream-dim); }
.chbody { min-width:0; }
.plate { position:relative; }
.plate img { width:100%; height:clamp(320px,52vh,460px); object-fit:cover; opacity:.88; }
.plate .pveil { position:absolute; inset:0; background:linear-gradient(0deg,rgba(10,17,30,.9),rgba(10,17,30,.06) 60%); }
.plate .pcap { position:absolute; left:clamp(1.2rem,5vw,3.4rem); right:1rem; bottom:1.9rem; }
.plate h2 { font:500 var(--text-chapter) var(--serif); line-height:1.05; margin:.4rem 0 0; }

/* ---- facts / paper / inquiry / credits (used tasks 4+) ---- */
.facts { display:flex; flex-wrap:wrap; justify-content:center; padding:2rem 1rem; border-block:1px solid var(--hairline); }
.facts .f { padding:0 clamp(1.1rem,4vw,2.6rem); text-align:center; border-left:1px solid var(--hairline); }
.facts .f:first-child { border-left:none; }
.facts .v { font:500 1.65rem var(--serif); font-variant-numeric:tabular-nums; }
.facts .k { color:var(--cream-dim); font:500 10.5px var(--sans); letter-spacing:.24em; text-transform:uppercase; margin-top:.3rem; }
.paper { background:var(--paper); color:var(--paper-ink); margin:0 clamp(1.2rem,5vw,3.4rem) 3.4rem;
  padding:clamp(1.4rem,4vw,2.6rem); display:grid; grid-template-columns:1.15fr .85fr; gap:2rem; align-items:center; }
.paper .lbl { color:var(--paper-accent); }
.paper h3 { font:500 1.8rem var(--serif); margin:.5rem 0 .7rem; }
.paper p { font-size:14.5px; line-height:1.7; color:var(--paper-mut); margin:0 0 1.2rem; }
.inkbtn { display:inline-block; background:var(--paper-ink); color:var(--paper); padding:.8rem 1.7rem;
  font:500 10.5px var(--sans); letter-spacing:.22em; text-transform:uppercase; text-decoration:none; }
.inkbtn.line { background:transparent; color:var(--paper-ink); border:1px solid var(--paper-ink); }
.inq { text-align:center; padding:4.4rem 1rem 4rem; }
.inq h2 { font:500 clamp(2.2rem,5vw,3.2rem) var(--serif); margin:.6rem 0 .7rem; }
.inq p { color:var(--cream-dim); margin:0 0 1.8rem; }
.inq a { display:inline-block; padding:.55rem .15rem; }
.credits { border-top:1px solid var(--hairline); text-align:center; padding:2.4rem 1rem 2.8rem;
  color:var(--cream-dim); font:400 11.5px var(--sans); letter-spacing:.12em; }
.credits .wm { font:500 1rem var(--serif); color:var(--cream); letter-spacing:.28em; text-transform:uppercase; margin-bottom:.7rem; }
.credits .row { display:flex; gap:1.6rem; justify-content:center; flex-wrap:wrap; margin-top:.8rem; }
.credits a { color:var(--cream-dim); text-decoration:none; display:inline-block; padding:.55rem .1rem; }

/* ---- mobile menu sheet ---- */
.menu-btn { display:none; font:500 11px var(--sans); letter-spacing:.22em; text-transform:uppercase;
  color:var(--cream); background:none; border:0; padding:.55rem .2rem; cursor:pointer; min-height:44px; }
.menu-sheet { position:fixed; inset:0; z-index:60; background:rgba(10,17,30,.98);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:1.7rem;
  padding:calc(4.5rem + env(safe-area-inset-top)) 2rem calc(2.5rem + env(safe-area-inset-bottom)); text-align:center; }
.menu-sheet[hidden] { display:none; }
.msheet-link { font:500 1.7rem var(--serif); color:var(--cream); text-decoration:none; }
.msheet-cta { margin-top:.6rem; }
.msheet-contact { font:400 13px var(--sans); color:var(--cream-dim); letter-spacing:.06em; margin:.4rem 0 0; }
.msheet-contact a { color:inherit; text-decoration:none; }

/* ---- mobile chapter progress (inline in the nav, replaces the rail ≤820px) ---- */
.mprog { display:none; }
.still-open { display:block; width:100%; padding:0; border:0; background:none; cursor:pointer; }
#top, #residence, #grounds, #village, #book, #inquiry { scroll-margin-top:calc(var(--nav-h, 64px) + 8px); }
@media (max-width:820px) {
  .chapter { grid-template-columns:1fr; }
  .rail { display:none; }
  .chapter-links { display:none; }
  .menu-btn { display:inline-block; }
  .nav .ghost { display:none; }
  .paper { grid-template-columns:1fr; }
  .mprog { display:flex; gap:1.2rem; margin-left:auto; }
  .mprog a { font:500 11px var(--sans); letter-spacing:.2em; color:var(--cream-dim);
    text-decoration:none; padding:.5rem .45rem; min-height:44px; display:flex; align-items:center; }
  .mprog a.on { color:var(--brass); }
  .pill { min-height:44px; }
}
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } * { transition:none !important; animation:none !important; } }

.tour { position:relative; margin:0 clamp(1.2rem,5vw,3.4rem) 3rem; aspect-ratio:16/9; background:var(--ink-2); }
.tour iframe { width:100%; height:100%; border:0; }
.tour-lbl { position:absolute; left:0; bottom:-1.6rem; }
.stillrow { display:grid; grid-template-columns:repeat(3,1fr); gap:.7rem; padding:0 clamp(1.2rem,5vw,3.4rem) .7rem; }
.stillrow.two { grid-template-columns:1.5fr 1fr; }
.still { margin:0; }
.still img, .plate img { background-color:var(--ink-2); background-size:cover; background-position:center; background-repeat:no-repeat; }
.still img { aspect-ratio:4/3; object-fit:cover; width:100%; opacity:.92; }
.still figcaption { font:500 10.5px var(--sans); color:var(--cream-dim); padding:.55rem 0 .9rem; letter-spacing:.22em; text-transform:uppercase; }
.galcue { padding:0 clamp(1.2rem,5vw,3.4rem) 3rem; margin:0; }
.cue-btn { background:none; border:none; cursor:pointer; font:500 12px var(--sans); color:var(--brass); letter-spacing:.08em; padding:.9rem 0; min-height:44px; display:inline-flex; align-items:center; text-align:left; }
@media (max-width:820px) { .stillrow, .stillrow.two { grid-template-columns:1fr 1fr; padding-inline:.5rem; gap:2px; } }

.prog { display:grid; grid-template-columns:.9fr 1.3fr; gap:clamp(1.4rem,4vw,3rem); padding:3rem clamp(1.2rem,5vw,3.4rem); }
.prog-note { font-size:14px; color:var(--cream-dim); margin:0 0 .8rem; }
.programme { list-style:none; margin:.4rem 0 0; padding:0; }
.prog-row { display:flex; justify-content:space-between; align-items:center; gap:1rem; width:100%;
  min-height:44px; padding:.4rem 0;
  background:none; border:none; border-bottom:1px solid var(--hairline); cursor:pointer;
  font:400 13.5px var(--sans); color:rgba(242,237,227,.86); text-align:left; }
.prog-row .n { color:var(--brass); font-variant-numeric:tabular-nums; }
.prog-row:hover span:first-child { color:var(--cream); }
.sgrid { display:grid; grid-template-columns:1fr 1fr; gap:.7rem; }
#lightbox { position:fixed; inset:0; z-index:80; background:rgba(10,17,30,.97); display:none;
  align-items:center; justify-content:center; overscroll-behavior:contain; }
#lightbox.active { display:grid; grid-template-rows:auto 1fr; }
.lb-tabs { display:flex; gap:1.1rem; justify-content:center; flex-wrap:wrap; padding:1rem 3.4rem; }
.lb-tab { background:none; border:none; cursor:pointer; font:500 10.5px var(--sans); letter-spacing:.22em;
  text-transform:uppercase; color:var(--cream-dim); padding:.3rem 0; border-bottom:1px solid transparent; }
.lb-tab.on { color:var(--brass); border-bottom-color:var(--brass); }
.lb-fig { margin:0; display:flex; flex-direction:column; align-items:center; justify-content:center; min-height:0; padding:0 4.5rem 2rem; }
.lb-fig img { max-height:78vh; max-width:100%; object-fit:contain; transition:opacity .18s ease; }
.lb-fig figcaption { display:flex; gap:1.4rem; padding-top:.8rem; font:500 10.5px var(--sans); color:var(--cream-dim); letter-spacing:.22em; text-transform:uppercase; }
.lb-count { font-variant-numeric:tabular-nums; }
.lb-close,.lb-prev,.lb-next { position:fixed; background:rgba(10,17,30,.55); border:1px solid var(--hairline); color:var(--cream);
  cursor:pointer; width:44px; height:44px; border-radius:50%; font-size:20px; }
.lb-close { top:max(1rem, env(safe-area-inset-top)); right:max(1rem, env(safe-area-inset-right)); }
.lb-prev { left:1rem; top:50%; transform:translateY(-50%); }
.lb-next { right:1rem; top:50%; transform:translateY(-50%); }
@media (max-width:820px) {
  .prog { grid-template-columns:1fr; }
  .lb-prev { left:max(.5rem, env(safe-area-inset-left)); }
  .lb-next { right:max(.5rem, env(safe-area-inset-right)); }
  .lb-fig { padding:0 .5rem calc(1.4rem + env(safe-area-inset-bottom)); }
  .lb-tabs { flex-wrap:nowrap; overflow-x:auto; justify-content:flex-start;
    padding:calc(.9rem + env(safe-area-inset-top)) 3.6rem .9rem 1rem;
    scrollbar-width:none; -webkit-overflow-scrolling:touch; }
  .lb-tabs::-webkit-scrollbar { display:none; }
  .lb-tabs { -webkit-mask-image:linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 64px), transparent 100%);
    mask-image:linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 64px), transparent 100%); }
  .lb-tab { flex:0 0 auto; padding-block:.6rem; }
  .map-wrap { aspect-ratio:4/3; }
  .facts .f { border-left:none; }
  .facts .f:nth-child(even) { border-left:1px solid var(--hairline); }
}

.dist { display:flex; flex-wrap:wrap; gap:.6rem 2rem; padding:.4rem 0 0; }
.dist span { font:400 12px var(--sans); letter-spacing:.1em; color:var(--cream-dim); }
.dist b { color:var(--cream); font-weight:500; }
.films { display:grid; grid-template-columns:minmax(0,1.4fr) repeat(3, minmax(0,1fr)); gap:.7rem; padding:0 clamp(1.2rem,5vw,3.4rem) 1rem; }
.filmcard { position:relative; border:1px solid var(--hairline); background:var(--ink-2); aspect-ratio:16/10;
  overflow:hidden; padding:0; cursor:pointer; display:flex; align-items:center; justify-content:center; flex-direction:column; gap:.6rem; min-width:0; }
.filmcard iframe { width:100%; height:100%; border:0; }
.filmcard img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:.45; }
.filmcard .ft { position:relative; font:400 12px var(--sans); color:var(--cream-dim); padding:0 .8rem; text-align:center; }
.filmcard.featured .fmeta { position:absolute; left:.9rem; bottom:.7rem; display:flex; flex-direction:column; gap:.2rem; text-align:left; }
.miniplay { position:relative; width:34px; height:34px; border:1px solid var(--brass); border-radius:50%; }
.miniplay::after { content:""; position:absolute; left:12px; top:9px; border-style:solid; border-width:7px 0 7px 11px;
  border-color:transparent transparent transparent var(--brass); }
.mappanel { margin:1.4rem clamp(1.2rem,5vw,3.4rem) 3rem; border:1px solid var(--hairline); background:var(--ink-2);
  padding:2rem; display:grid; grid-template-columns:auto 1fr; gap:1.5rem 2rem; align-items:center; }
.mappanel .addr { font:500 1.25rem var(--serif); }
.map-wrap { grid-column:1/-1; aspect-ratio:16/8; }
.map-wrap iframe { width:100%; height:100%; border:0; }
.pills { display:flex; gap:.5rem; justify-self:end; }
.pills { flex-wrap:wrap; }
.pill { font:500 10.5px var(--sans); letter-spacing:.18em; text-transform:uppercase; padding:.5rem 1rem;
  border:1px solid var(--hairline); color:var(--cream-dim); background:none; cursor:pointer; white-space:nowrap; }
.pill.active { border-color:var(--brass); color:var(--brass); }
.pill-ext { border-style:dashed; }
@media (max-width:820px) { .films { grid-template-columns:minmax(0,1fr) minmax(0,1fr); } .filmcard.featured { grid-column:1/-1; } .mappanel { grid-template-columns:minmax(0,1fr); } .pills { justify-self:start; } }

.bookplate { background:var(--paper); color:var(--paper-ink); margin:0 clamp(1.2rem,5vw,3.4rem);
  padding:clamp(1.6rem,4vw,3rem); display:grid; grid-template-columns:auto 1fr; gap:clamp(1.4rem,4vw,3rem); align-items:center; }
.bookplate img { width:200px; box-shadow:0 18px 40px rgba(20,25,35,.35); border:1px solid rgba(28,36,49,.2); }
.bookplate .lbl { color:var(--paper-accent); }
.bookplate h3 { font:500 1.9rem var(--serif); margin:.45rem 0 .6rem; }
.bookplate p { color:var(--paper-mut); font-size:14.5px; margin:0 0 1.2rem; max-width:48ch; }
.bookplate .inkbtn + .inkbtn { margin-left:.6rem; }
@media (max-width:820px) { .bookplate { grid-template-columns:1fr; } }