/* Chapter 05, the Dojo: a training hall drawn in ink.
   The hall: one sumi-e painting of a dojo (media/dojo/hall.webp, made on Higgsfield) with a film playing in its open doorway.
   Its shoji doors are cut from the painting's own side screens, so closed, the hall reads as one shoji wall; they slide into
   the posts when the hall comes into view, and close and reopen when a name tag (nafuda) below picks another film.
   The practice wall: one window per experiment under a beam and posts cut from the same painting, with the same doors.
   Night swaps in a night painting (lantern light behind the shoji, a moonlit garden), made ahead of time, not filtered live.
   Positions are measured on the 2016x864 painting: the doorway is x 606-1419, y 153-640. */
#lab{--dj-art:url(../media/dojo/hall.webp);--dj-dl:url(../media/dojo/door-l.webp);--dj-dr:url(../media/dojo/door-r.webp);
  --dj-post:url(../media/dojo/post.webp);--dj-beam:url(../media/dojo/beam.webp);
  --dj-track:#2b2824;--dj-door:#efe7d8;--dj-wood:#ecdfc6;--dj-wood-2:#e2d1b2;--dj-edge:rgba(65,48,27,.3);--dj-cord:#8d7550}
.is-night #lab{--dj-art:url(../media/dojo/hall-n.webp);--dj-dl:url(../media/dojo/door-l-n.webp);--dj-dr:url(../media/dojo/door-r-n.webp);
  --dj-post:url(../media/dojo/post-n.webp);--dj-beam:url(../media/dojo/beam-n.webp);
  --dj-track:#141313;--dj-door:#9a7650;--dj-wood:#e3cfa8;--dj-wood-2:#d2b88c;--dj-edge:rgba(20,14,6,.45);--dj-cord:#b08a55}
/* the art waits until the Dojo is near (dojo.js drops .far), so it never competes with the top of the page */
#lab.far .dj-art,#lab.far .dj-door{background-image:none}
#lab.far .dj-board::before,#lab.far .dj-sash::before,#lab.far .dj-bay:last-child .dj-sash::after{background:var(--dj-track)}

.dj-in{display:flex;flex-direction:column;gap:clamp(64px,8vw,112px)}

/* ── the hall ── */
.dj-hall{position:relative;width:100%;max-width:1240px;margin:0 auto}
.dj-stage{--ol:30.06%;--ow:40.33%;--ot:17.71%;--oh:56.37%;position:relative;aspect-ratio:2016/864;container-type:inline-size}
/* no frame: the painting's edges dissolve into the page, like the testimonials' pines */
.dj-art{position:absolute;inset:0;background:var(--dj-art) center/100% 100% no-repeat;pointer-events:none;
  -webkit-mask:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent),linear-gradient(transparent,#000 6%,#000 80%,transparent);-webkit-mask-composite:source-in;
  mask:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent),linear-gradient(transparent,#000 6%,#000 80%,transparent);mask-composite:intersect}
/* morning light through the side screens: three soft beams that lean across the tatami and breathe very slowly.
   Plain gradients, no blend modes or blur, so they cost nothing on phones */
.dj-light{position:absolute;inset:0;overflow:hidden;pointer-events:none;
  -webkit-mask:linear-gradient(transparent 35%,#000 62%,#000 82%,transparent);mask:linear-gradient(transparent 35%,#000 62%,#000 82%,transparent)}
.dj-light i{position:absolute;top:-10%;height:130%;width:9%;background:linear-gradient(to right,transparent,rgba(255,252,240,.55) 45%,rgba(255,252,240,.55) 55%,transparent);
  transform:skewX(-34deg);opacity:.0;animation:djBreathe 11s ease-in-out infinite alternate}
.dj-light i:nth-child(1){left:12%;animation-delay:-3s}
.dj-light i:nth-child(2){left:22%;width:5%;animation-duration:14s}
.dj-light i:nth-child(3){left:80%;width:7%;transform:skewX(34deg);animation-duration:13s;animation-delay:-6s}
@keyframes djBreathe{from{opacity:.25;translate:-1.5% 0}to{opacity:.85;translate:1.5% 0}}
.is-night .dj-light i{background:linear-gradient(to right,transparent,rgba(255,176,92,.16) 45%,rgba(255,176,92,.16) 55%,transparent)}
#lab:not(.awake) .dj-light i{animation-play-state:paused}

/* the doorway: the film sits full width; the slim gaps above and below it are the dark door tracks (the painted
   doorway is a touch taller than 16:9), drawn as the screen's own outline and clipped to the doorway */
.dj-way{position:absolute;left:var(--ol);top:var(--ot);width:var(--ow);height:var(--oh);overflow:hidden;display:grid;align-items:center}
.dj-screen{position:relative;width:100%;aspect-ratio:16/9;background:#0b0b0b;outline:3cqw solid var(--dj-track);opacity:0;transition:opacity .25s linear .6s}
.dj-screen video{display:block;width:100%;height:100%;object-fit:cover}
/* as the doors part, the misty garden shows for a moment, then the film comes up out of it */
.dj-hall.open .dj-screen{opacity:1;transition:opacity .8s ease .5s}
.dj-door{position:absolute;top:0;bottom:0;z-index:3;width:50.4%;background:var(--dj-door) var(--dj-dl) 0 0/100% 100% no-repeat;
  transition:transform 1.3s cubic-bezier(.7,0,.18,1);will-change:transform}
.dj-door.l{left:0}
.dj-door.r{right:0;background-image:var(--dj-dr)}
/* a hairline of shade where the two doors meet */
.dj-door.l::after{content:"";position:absolute;top:0;bottom:0;right:0;width:4px;background:linear-gradient(to left,rgba(40,28,14,.18),transparent)}
.dj-hall.open .dj-way .dj-door.l{transform:translateX(-101%)}
.dj-hall.open .dj-way .dj-door.r{transform:translateX(101%)}
/* changing films is quicker than the first arrival */
.dj-hall.swap .dj-way .dj-door{transition-duration:.55s;transition-timing-function:cubic-bezier(.55,0,.3,1)}
.dj-hall.swap.open .dj-way .dj-door{transition-duration:.9s;transition-timing-function:cubic-bezier(.3,.6,.2,1)}
.dj-hall.swap.open .dj-screen{transition-delay:.2s}

.dj-expand{position:absolute;inset:0;z-index:2;display:flex;align-items:flex-end;justify-content:flex-end;padding:10px;border:0;background:linear-gradient(transparent 60%,rgba(0,0,0,.35));cursor:zoom-in;opacity:0;transition:opacity .25s}
.dj-screen:hover .dj-expand,.dj-expand:focus-visible{opacity:1}
.dj-expand:focus-visible{outline:2px solid var(--marker);outline-offset:-4px}
.dj-expand span{font:500 10.5px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:#141413;background:#f6f1e7 url(../media/washi.webp) center/cover;padding:7px 9px;box-shadow:inset 0 0 0 1px rgba(65,48,27,.25)}
@media (hover:none){.dj-expand{opacity:1;background:none}}

/* ── under the doorway: the name board and what's showing ── */
.dj-under{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:26px;margin-top:-4.6%}
/* nafudakake: wooden name tags hung from a short rail, the way a dojo lists its members. The one showing hangs lower,
   on a red cord. They're real buttons; the board is a group, so Tab and Enter work as usual */
.dj-board{position:relative;display:flex;gap:clamp(16px,1.8vw,24px);padding:22px 18px 0}
.dj-board::before{content:"";position:absolute;left:4px;right:4px;top:0;height:5px;border-radius:3px;background:var(--dj-beam) center/100% 100%,var(--dj-track)}
.dj-tag{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:10px;width:54px;height:156px;padding:22px 0 12px;
  border:0;border-radius:3px;cursor:pointer;color:#141413;-webkit-tap-highlight-color:transparent;
  background:repeating-linear-gradient(90deg,rgba(122,90,52,.07) 0 1px,transparent 1px 6px),linear-gradient(var(--dj-wood),var(--dj-wood-2));
  box-shadow:inset 0 0 0 1px var(--dj-edge);opacity:.58;transform-origin:50% -22px;
  transition:opacity .3s,translate .45s cubic-bezier(.3,1.4,.4,1)}
/* the cord up to the rail, and the hole it's threaded through */
.dj-tag::before{content:"";position:absolute;left:50%;top:-22px;width:1.5px;height:30px;margin-left:-.75px;background:var(--dj-cord)}
.dj-tag::after{content:"";position:absolute;left:50%;top:6px;width:6px;height:6px;margin-left:-3px;border-radius:50%;box-shadow:0 0 0 1.5px var(--dj-cord);background:rgba(65,48,27,.2)}
.dj-tag span{writing-mode:vertical-rl;font:400 22px/1 "Bangers",sans-serif;letter-spacing:.08em}
.dj-tag small{font:500 10px/1 var(--f-mono);letter-spacing:.04em;color:#5f5e5a}
.dj-tag:hover{opacity:.9;animation:djSwing 1.1s ease-in-out}
.dj-tag[aria-pressed="true"]{opacity:1;translate:0 8px}
.dj-tag[aria-pressed="true"]::before,.dj-tag[aria-pressed="true"]::after{background:#b3261e;box-shadow:0 0 0 1.5px #b3261e}
.dj-tag:focus-visible{outline:2px solid var(--marker);outline-offset:4px}
@keyframes djSwing{0%,100%{rotate:0deg}25%{rotate:3deg}60%{rotate:-2deg}85%{rotate:.8deg}}
.is-night .dj-tag{box-shadow:inset 0 0 0 1px var(--dj-edge),0 0 22px -6px rgba(255,170,80,.45)}

.dj-cap{position:relative;display:flex;flex-direction:column;align-items:center;gap:10px;max-width:600px;text-align:center;transition:opacity .3s}
.dj-cap.out{opacity:0}
.dj-cap h3{font:400 clamp(28px,2.4vw,36px)/1 "Bangers",sans-serif;letter-spacing:.03em;color:var(--ink)}
.dj-cap .dj-line{font-size:15px;max-width:52ch}
.dj-cap .mbtn{margin-top:8px}

/* shared bits: the experiment number on a small wooden tag, one true line, the credit line, a brush note on a paper slip */
#lab .dj-no{display:inline-block;padding:5px 8px 4px;border-radius:2px;font:500 10px/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:#141413;white-space:nowrap;
  background:repeating-linear-gradient(90deg,rgba(122,90,52,.07) 0 1px,transparent 1px 6px),var(--dj-wood);box-shadow:inset 0 0 0 1px var(--dj-edge);rotate:-2deg}
#lab .dj-line{line-height:1.5;color:var(--ink-2);text-wrap:pretty}
#lab .dj-kit{font:500 10px/1.6 var(--f-mono);letter-spacing:.07em;text-transform:uppercase;color:var(--ink-2)}
#lab .dj-kit b{margin-right:4px;font-weight:500;color:var(--marker)}
#lab .dj-note{position:absolute;z-index:4;right:10px;bottom:-15px;padding:2px 9px 3px;font:500 18px/1 var(--f-hand);color:var(--marker);white-space:nowrap;
  background:#f6f1e7 url(../media/washi.webp) center/cover;box-shadow:inset 0 0 0 1px rgba(65,48,27,.16);rotate:-4deg;pointer-events:none}
#lab .dj-stage > .dj-note{right:calc(100% - var(--ol) - var(--ow) + 8px);bottom:auto;top:calc(var(--ot) + var(--oh) - 16px);font-size:clamp(17px,1.5vw,21px);opacity:0;transition:opacity .3s}
#lab .dj-hall.open .dj-stage > .dj-note{opacity:1;transition:opacity .5s ease 1.1s}
.is-night #lab .dj-note{background:#5d5747 url(../media/washi-dark.webp) center/240px;color:#ff8a4c;box-shadow:inset 0 0 0 1px rgba(242,239,231,.14)}

/* ── the practice wall ── */
/* five windows in a row under one beam, split by posts; the beam, posts and doors are all cut from the hall painting */
.dj-wall{position:relative;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));max-width:1240px;width:100%;margin:0 auto}
.dj-bay{position:relative;display:flex;flex-direction:column;min-width:0}
.dj-sash{--kumiko:rgba(43,40,36,.13);position:relative;padding:20px clamp(12px,1.2vw,18px) 16px;
  background:var(--dj-beam) 0 0/auto 8px repeat-x,linear-gradient(var(--dj-track),var(--dj-track)) 0 100%/100% 2px no-repeat,
    linear-gradient(90deg,var(--kumiko) 1px,transparent 1px) -1px 8px/25% 100%,linear-gradient(var(--kumiko) 1px,transparent 1px) 0 8px/100% 22px,var(--dj-paper,linear-gradient(#f3eee4,#f3eee4))}
#lab.far .dj-sash{background:var(--dj-paper,linear-gradient(#f3eee4,#f3eee4))}
.dj-sash::before,.dj-bay:last-child .dj-sash::after{content:"";position:absolute;top:0;bottom:0;left:-3px;width:7px;z-index:1;background:var(--dj-post) center/100% 100%,var(--dj-track)}
.dj-bay:last-child .dj-sash::after{left:auto;right:-3px}
/* at night the paper round each window glows like the hall's screens, lamp-lit from behind */
.is-night .dj-sash{--kumiko:rgba(24,14,4,.42);--dj-paper:radial-gradient(120% 90% at 50% 55%,#8d6a43,#5b4129)}
.dj-win{position:relative;margin:0;aspect-ratio:16/10;overflow:hidden;background:#e9e3d6;box-shadow:inset 0 0 0 1px rgba(43,40,36,.35)}
.dj-win[data-run]{cursor:pointer}
.dj-win img,.dj-win video{display:block;width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.dj-bay:hover .dj-win img,.dj-bay:hover .dj-win video{transform:scale(1.04)}
.dj-win .dj-door{transition-duration:1.1s;transition-delay:calc(var(--i,0) * .14s + .1s)}
.dj-wall.open .dj-door.l,.dj-win.open .dj-door.l{transform:translateX(-101%)}
.dj-wall.open .dj-door.r,.dj-win.open .dj-door.r{transform:translateX(101%)}
.dj-txt{display:flex;flex-direction:column;gap:9px;flex:1;padding:22px clamp(12px,1.2vw,18px) 0}
.dj-row{display:flex;justify-content:space-between;align-items:center;gap:8px}
.dj-row .mbtn{padding:7px 9px 6px 11px;font-size:10px;letter-spacing:.12em}
.dj-txt h3{font:400 clamp(20px,1.6vw,24px)/1 "Bangers",sans-serif;letter-spacing:.03em;color:var(--ink)}
.dj-txt .dj-line{font-size:13.5px}
.dj-txt .dj-kit{margin-top:auto;padding-top:9px;border-top:1px dashed color-mix(in srgb,var(--ink) 22%,transparent)}

/* below a laptop the wall becomes a corridor you swipe along */
@media (max-width:1099px){
  .dj-wall{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:clamp(20px,3vw,44px);max-width:none;margin:0 calc(clamp(20px,3vw,44px) * -1);padding:0 clamp(20px,3vw,44px) 26px;scrollbar-width:none}
  .dj-wall::-webkit-scrollbar{display:none}
  .dj-bay{flex:0 0 min(78vw,320px);scroll-snap-align:start}
  .dj-win .dj-door{transition-delay:.05s}
  /* a brush note says the wall carries on sideways, and fades once it has been swiped */
  .dj-swipe{display:block;align-self:flex-end;margin:-6px 0 0;font:500 19px/1 var(--f-hand);color:var(--marker);rotate:-3deg;transition:opacity .4s}
  .dj-swipe::after{content:" →"}
  .dj-wall.swiped + .dj-swipe{opacity:0}
  .dj-in{gap:clamp(56px,8vw,112px)}
  .dj-wall + .dj-swipe{margin-top:calc(-1 * clamp(56px,8vw,112px) + 4px)}
}
.dj-swipe{display:none}
/* phones: the painting crops to the doorway and its posts, so the film keeps its size */
@media (max-width:700px){
  #lab{--dj-art:url(../media/dojo/hall-s.webp)}
  .is-night #lab{--dj-art:url(../media/dojo/hall-n-s.webp)}
  /* the hall runs to the screen edges here, so the film gets the most width */
  .dj-stage{aspect-ratio:968/720;--ol:8.06%;--ow:83.99%;--ot:15.69%;--oh:67.64%;margin:0 calc(clamp(20px,3vw,44px) * -1)}
  .dj-art{-webkit-mask:linear-gradient(to right,transparent,#000 5%,#000 95%,transparent),linear-gradient(transparent,#000 5%,#000 82%,transparent);-webkit-mask-composite:source-in;
    mask:linear-gradient(to right,transparent,#000 5%,#000 95%,transparent),linear-gradient(transparent,#000 5%,#000 82%,transparent);mask-composite:intersect}
  .dj-light i:nth-child(1){left:-6%}.dj-light i:nth-child(2){left:6%}.dj-light i:nth-child(3){left:92%}
  /* at night the crop loses the lamp-lit screens either side, so their light spills in from the edges */
  .is-night .dj-stage::after{content:"";position:absolute;inset:8% 0 12%;z-index:1;pointer-events:none;
    background:radial-gradient(34% 55% at 0 42%,rgba(255,168,88,.30),transparent 72%),radial-gradient(34% 55% at 100% 42%,rgba(255,168,88,.30),transparent 72%),
      radial-gradient(60% 30% at 50% 96%,rgba(255,168,88,.16),transparent 75%)}
  .dj-way,#lab .dj-stage > .dj-note{z-index:2}
  .dj-under{margin-top:-6%;gap:22px}
  .dj-board{gap:14px;padding-top:20px}
  .dj-tag{width:46px;height:132px;padding:20px 0 10px}
  .dj-tag span{font-size:19px}
}
@media (prefers-reduced-motion:reduce){
  .dj-door,.dj-screen,.dj-cap,.dj-tag,.dj-win img,.dj-win video{transition:none!important}
  .dj-light i{animation:none;opacity:.55}
  .dj-tag:hover{animation:none}
  .dj-bay:hover .dj-win img,.dj-bay:hover .dj-win video{transform:none}
}