/* deckhaus — 06 Selected work: the tunnel.
   Scroll moves the camera forward through the work in three chapters. */
.tun{position:relative;background:#0A0A0B;color:var(--paper)}
.tun__pin{position:sticky;top:var(--tun-top,0px);height:calc(100vh - var(--tun-top,0px));height:calc(100svh - var(--tun-top,0px));overflow:hidden;isolation:isolate}
.tun__grid{position:absolute;inset:0;background-image:linear-gradient(rgba(244,244,239,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(244,244,239,.04) 1px,transparent 1px);background-size:80px 80px;pointer-events:none}
.tun__3d{position:absolute;inset:0;z-index:1;perspective:900px;perspective-origin:50% 50%;overflow:hidden}
.tun__world{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d}
.tun .it{position:absolute;left:0;top:0;width:clamp(300px,34vw,560px);aspect-ratio:16/9;margin:0;border-radius:10px;overflow:hidden;border:1px solid rgba(244,244,239,.18);background:#111114;cursor:zoom-in;visibility:hidden;opacity:0;backface-visibility:hidden;will-change:transform,opacity;transition:border-color .3s ease,box-shadow .3s ease}
.tun .it img{display:block;width:100%;height:100%;object-fit:cover}
.tun .it figcaption{position:absolute;left:0;bottom:0;padding:8px 11px;font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--paper);background:rgba(10,10,11,.84);border-top-right-radius:6px;transition:background .3s ease,color .3s ease}
.tun .it:hover,.tun .it.focus{border-color:var(--lime-500)}
.tun .it.focus{box-shadow:0 50px 110px -40px rgba(0,0,0,1)}
.tun .it.focus figcaption{background:var(--lime-500);color:#0A0A0B}
.tun .it:focus-visible{outline:none;box-shadow:var(--ring-focus)}
.tun .ch{position:absolute;left:0;top:0;width:min(1100px,86vw);text-align:center;pointer-events:none;visibility:hidden;opacity:0;backface-visibility:hidden;will-change:transform,opacity}
.tun .ch__k{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--lime-500);margin-bottom:18px}
.tun .ch__w{display:block;font-family:var(--font-display);font-weight:400;letter-spacing:0;font-size:clamp(84px,13vw,220px);line-height:1;color:var(--paper)}
.tun__intro,.tun__outro{position:absolute;inset:0;z-index:10;transform:translateZ(0);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 var(--page-margin);pointer-events:none}
.tun__intro h2{font-family:var(--font-display);font-weight:400;letter-spacing:0;font-size:clamp(44px,6.4vw,108px);line-height:1.06;max-width:14ch;margin:24px 0 0;color:var(--paper);text-wrap:balance}
.tun__intro h2 span{color:var(--lime-500)}
.tun__hint{margin-top:28px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:#8E8E96}
.tun__outro{opacity:0}
.tun__box{pointer-events:auto;background:#0A0A0B;border:1px solid rgba(244,244,239,.16);border-radius:12px;padding:clamp(28px,3vw,44px);max-width:560px}
.tun__box .k{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--lime-500)}
.tun__box h3{font-family:var(--font-display);font-weight:400;letter-spacing:0;font-size:clamp(30px,3.2vw,48px);line-height:1.1;margin:18px 0 24px;color:var(--paper)}
.tun__acts{display:flex;gap:18px;flex-wrap:wrap;align-items:center;justify-content:center}
.tun__hud{position:absolute;left:var(--page-margin);right:var(--page-margin);bottom:clamp(18px,2.4vw,32px);z-index:11;display:grid;grid-template-columns:minmax(190px,auto) minmax(0,1fr) auto;gap:clamp(20px,3vw,48px);align-items:end}
.tun__read{display:flex;flex-direction:column;gap:6px;min-width:0}
.tun__count{display:flex;align-items:baseline;gap:10px;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.tun__count b{font-family:var(--font-display);font-weight:400;font-size:clamp(30px,2.6vw,40px);line-height:1;color:var(--paper)}
.tun__count span{font-size:12px;letter-spacing:.14em;color:#8E8E96}
.tun__sub{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#9A9AA2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34ch}
.tun__segs{display:flex;gap:6px;min-width:0}
.seg{flex:1 1 auto;min-width:max-content;appearance:none;background:none;border:0;padding:0 0 4px;cursor:pointer;display:flex;flex-direction:column;gap:11px;text-align:left;color:#8E8E96;transition:color .25s ease}
.seg__l{min-width:max-content;display:flex;align-items:baseline;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;white-space:nowrap;overflow:hidden}
.seg__l em{font-style:normal;color:inherit;font-variant-numeric:tabular-nums}
.seg__l i{font-style:normal;margin-left:auto;opacity:.7;font-variant-numeric:tabular-nums}
.seg__t{position:relative;display:block;height:2px;background:rgba(244,244,239,.14);border-radius:2px;overflow:hidden;transition:height .2s ease}
.seg__t s{position:absolute;inset:0;background:var(--paper);transform:scaleX(0);transform-origin:0 50%;text-decoration:none}
.seg:hover{color:#D2D2D8}
.seg:hover .seg__t{height:4px}
.seg.done{color:#B4B4BB}
.seg.done .seg__t s{background:rgba(244,244,239,.55)}
.seg.on{color:var(--paper)}
.seg.on .seg__l em{color:var(--lime-500)}
.seg.on .seg__t s{background:var(--lime-500)}
.seg:focus-visible{outline:none;box-shadow:var(--ring-focus);border-radius:4px}
@media (max-width:760px){
  .tun .it{width:78vw}
  .tun__hud{grid-template-columns:1fr auto;bottom:14px;gap:12px 16px}
  .tun__segs{grid-column:1/-1;grid-row:2}
  .seg__l i{display:none}
  .tun__sub{max-width:22ch}
  .tun .ch__w{font-size:clamp(64px,18vw,120px)}
}

/* ways in: every chapter opens its own page */
.tun .ch__go{pointer-events:auto;display:inline-flex;align-items:center;gap:10px;margin-top:26px;height:48px;padding:0 22px;border-radius:8px;border:1px solid rgba(244,244,239,.3);font-size:16px;color:var(--paper);background:rgba(10,10,11,.72);transition:background .2s,border-color .2s,color .2s}
.tun .ch__go:hover{background:var(--paper);color:#0A0A0B;border-color:var(--paper)}
.tun .ch__go:focus-visible{outline:none;box-shadow:var(--ring-focus)}
.tun__enter{display:inline-flex;align-items:center;gap:10px;height:42px;padding:0 18px;border-radius:8px;background:var(--lime-500);color:#0A0A0B;font-size:15px;white-space:nowrap;opacity:0;pointer-events:none;transform:translateY(6px);transition:opacity .25s ease,transform .3s cubic-bezier(.16,1,.3,1),background .2s}
.tun__enter.on{opacity:1;pointer-events:auto;transform:none}
.tun__enter:hover{background:var(--lime-400);color:#0A0A0B}
.tun__enter:focus-visible{outline:none;box-shadow:var(--ring-focus)}
.tun__doors{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:0 0 22px}
.tun__doors a{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:14px 14px 13px;border:1px solid rgba(244,244,239,.16);border-radius:8px;color:var(--paper);font-size:15px;text-align:left;transition:border-color .2s,transform .2s cubic-bezier(.16,1,.3,1)}
.tun__doors a span{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--lime-500)}
.tun__doors a:hover{border-color:rgba(244,244,239,.5);transform:translateY(-2px);color:var(--paper)}
.tun__doors a:focus-visible{outline:none;box-shadow:var(--ring-focus)}


@media (max-width:1100px){.seg__l i{display:none}}