/* =========================================================
   3D objekty – čisté CSS 3D transformace, žádná knihovna.
   Rozměry jsou v `em`; velikost písma scény dopočítá JS
   podle šířky kontejneru, takže objekt vždy přesně sedne.
   ========================================================= */

/* ---------- 1. Univerzální kvádr ---------- */
.b3 {
  --w: 10em; --h: 10em; --d: 10em;
  --face:   #24262A;
  --face-s: #191B1E;
  --face-t: #32363B;
  --face-b: #0E0F11;
  position: absolute;
  width: var(--w);
  height: var(--h);
  transform-style: preserve-3d;
}
.b3 > span { position: absolute; display: block; box-sizing: border-box; background: var(--face); }
.b3 > .fr { inset: 0; transform: translateZ(calc(var(--d) / 2)); }
.b3 > .bk { inset: 0; transform: translateZ(calc(var(--d) / -2)) rotateY(180deg); background: var(--face-b); }
.b3 > .rt { top: 0; left: calc(50% - var(--d) / 2); width: var(--d); height: var(--h);
            transform: rotateY(90deg)  translateZ(calc(var(--w) / 2)); background: var(--face-s); }
.b3 > .lf { top: 0; left: calc(50% - var(--d) / 2); width: var(--d); height: var(--h);
            transform: rotateY(-90deg) translateZ(calc(var(--w) / 2)); background: var(--face-s); }
.b3 > .tp { left: 0; top: calc(50% - var(--d) / 2); width: var(--w); height: var(--d);
            transform: rotateX(90deg)  translateZ(calc(var(--h) / 2)); background: var(--face-t); }
.b3 > .bt { left: 0; top: calc(50% - var(--d) / 2); width: var(--w); height: var(--d);
            transform: rotateX(-90deg) translateZ(calc(var(--h) / 2)); background: var(--face-b); }

/* ---------- 2. Scéna ---------- */
.scene3d {
  position: relative;
  perspective: 1600px;
  perspective-origin: 50% 44%;
  overflow: hidden;
  width: 100%;
}
.scene3d__inner {
  position: absolute;
  left: 50%; top: 50%;
  font-size: 8px;                     /* záloha, JS ji přepíše */
  transform-style: preserve-3d;
  transform: translate(-50%, -50%) rotateX(var(--rx, 8deg)) rotateY(var(--ry, -16deg));
  transition: transform .45s cubic-bezier(.16,.84,.34,1);
}
.node { position: absolute; transform-style: preserve-3d; }

.rig  { aspect-ratio: 2 / 1;  min-height: 240px; }
.rig  .scene3d__inner { width: 96em; height: 48em; }
.mini { aspect-ratio: 5 / 4; }
.mini .scene3d__inner { width: 34em; height: 27em; }

/* podlaha */
.floor {
  position: absolute;
  left: 50%; top: 100%;
  width: 130em; height: 64em;
  margin-left: -65em;
  transform: rotateX(90deg);
  transform-origin: 50% 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.07), transparent 58%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.055) 0 1px, transparent 1px 6em),
    repeating-linear-gradient(0deg,  rgba(255,255,255,.055) 0 1px, transparent 1px 6em);
  mask-image: radial-gradient(58% 62% at 50% 10%, #000, transparent 74%);
  -webkit-mask-image: radial-gradient(58% 62% at 50% 10%, #000, transparent 74%);
  pointer-events: none;
}

/* ---------- 3. Truss ---------- */
.truss .b3 { --w: 84em; --h: 2em; --d: 2em; --face: #3D4046; --face-s: #292B2F; --face-t: #50545B; }
.truss .fr, .truss .bk {
  background-image:
    repeating-linear-gradient(58deg,  transparent 0 1.6em, rgba(0,0,0,.5) 1.6em 2em),
    repeating-linear-gradient(-58deg, transparent 0 1.6em, rgba(0,0,0,.5) 1.6em 2em);
}
.truss::before, .truss::after {
  content: ''; position: absolute; top: -2.4em; width: .45em; height: 2.4em; background: #50545B;
}
.truss::before { left: 8em; }
.truss::after  { left: 74em; }

/* ---------- 4. LED bary ---------- */
.ledbar { --led: #FFC061; }
.ledbar .b3 { --w: 1.7em; --d: 1.7em; --face: #101215; --face-s: #17191D; --face-t: #2A2D31; }
.ledbar .fr { background: #08090A; overflow: hidden; }
.ledbar .cells { position: absolute; inset: .24em; display: grid; grid-auto-rows: 1fr; gap: .16em; }
.ledbar .cells em {
  display: block; border-radius: .08em;
  background: var(--led);
  animation: barChase 2.8s linear infinite;
  animation-delay: calc(var(--i) * -.15s);
  opacity: .16;
}
@keyframes barChase {
  0%, 60%, 100% { opacity: .13; box-shadow: none; }
  16%, 33%      { opacity: 1; box-shadow: 0 0 .9em var(--led); }
}
/* závěs na trussu */
.ledbar::before {
  content: ''; position: absolute; left: .62em; top: -2.6em;
  width: .26em; height: 2.8em; background: #4A4E54;
}
/* světelný kužel pod barem */
.ledbar__beam {
  position: absolute; left: 50%; top: 1em;
  width: 13em; height: 26em; margin-left: -6.5em;
  background: linear-gradient(180deg, color-mix(in srgb, var(--led) 42%, transparent), transparent 70%);
  clip-path: polygon(44% 0, 56% 0, 100% 100%, 0 100%);
  filter: blur(1.1em);
  mix-blend-mode: screen;
  opacity: .5;
  pointer-events: none;
  animation: beamBreathe 5.5s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * -1.3s);
}
@keyframes beamBreathe { 0%,100% { opacity: .3; } 50% { opacity: .62; } }

/* ---------- 5. LED stěna ---------- */
.ledwall { transform: translateZ(-12em); }
.ledwall__panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: .36em;
  width: 52em; height: 27em;
  padding: .55em;
  background: #16181B;
  border: .4em solid #292C31;
  box-shadow: 0 0 6em rgba(90,120,190,.22);
}
.ledwall__panels i { position: relative; display: block; overflow: hidden; background: #050506; }
.ledwall__panels i::before {
  content: '';
  position: absolute; inset: -45%;
  background: conic-gradient(from 200deg,
    #1B4C8C, #2E86C4, #6E3FA0, #C24C6E, #D98A34, #1B4C8C);
  filter: blur(1.5em) saturate(1.1);
  animation: wallShift 20s linear infinite;
  animation-delay: calc(var(--i) * -1.6s);
  opacity: .8;
}
.ledwall__panels i::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg,  rgba(0,0,0,.6) 0 1px, transparent 1px .4em),
    repeating-linear-gradient(90deg, rgba(0,0,0,.6) 0 1px, transparent 1px .4em);
}
@keyframes wallShift { to { transform: rotate(360deg); } }
.ledwall::before, .ledwall::after {
  content: ''; position: absolute; top: -8.4em; width: .28em; height: 8.5em; background: #46494E;
}
.ledwall::before { left: 9em; }
.ledwall::after  { right: 9em; }

/* ---------- 6. Reproduktor na stativu ---------- */
.speaker__box { --w: 9.5em; --h: 14em; --d: 8.5em; --face: #1C1E22; --face-s: #131518; --face-t: #292C31; }
.speaker__box .fr {
  background:
    radial-gradient(circle at 50% 33%, #090A0B 0 3.3em, transparent 3.35em),
    radial-gradient(circle at 50% 33%, #2C3035 0 3.8em, transparent 3.85em),
    linear-gradient(170deg, #23262A, #15171A);
  border: .2em solid #31353A;
}
.speaker__box .fr::after {
  content: '';
  position: absolute; left: 50%; bottom: 1.7em; translate: -50% 0;
  width: 5.4em; height: 2.6em;
  background: linear-gradient(180deg, #16181B, #0A0B0C);
  clip-path: polygon(17% 0, 83% 0, 100% 100%, 0 100%);
}
.speaker__grill {
  position: absolute; inset: .2em;
  background-image: radial-gradient(rgba(255,255,255,.1) .06em, transparent .07em);
  background-size: .44em .44em;
  pointer-events: none;
}
.speaker__pole { --w: 1em; --h: 13em; --d: 1em; --face: #3E4147; --face-s: #2C2E33; --face-t: #52565C; }
.speaker__legs { position: absolute; transform-style: preserve-3d; }
.speaker__legs i {
  position: absolute; left: -.3em; top: 0;
  width: .6em; height: 8em;
  background: linear-gradient(180deg, #3E4147, #232528);
  transform-origin: 50% 0;
}
.speaker__legs i:nth-child(1) { transform: rotateY(0deg)   rotateZ(23deg) translateZ(.2em); }
.speaker__legs i:nth-child(2) { transform: rotateY(120deg) rotateZ(23deg) translateZ(.2em); }
.speaker__legs i:nth-child(3) { transform: rotateY(240deg) rotateZ(23deg) translateZ(.2em); }

/* ---------- 7. Závěsný mikrofon ---------- */
.mic { transform-origin: 50% 0; animation: micSway 8s ease-in-out infinite; }
@keyframes micSway { 0%,100% { transform: translateZ(18em) rotate(-1.6deg); } 50% { transform: translateZ(18em) rotate(1.6deg); } }
.mic__cable {
  position: absolute; left: 50%; top: 0;
  width: .34em; height: 12em; margin-left: -.17em;
  background: linear-gradient(180deg, #8A8F96, #494D53);
  box-shadow: 0 0 .5em rgba(0,0,0,.75);
}
.mic__body {
  --w: 2.4em; --h: 6.2em; --d: 2.4em;
  --face: #52575E; --face-s: #383C42; --face-t: #666C74; --face-b: #24272B;
}
.mic__head {
  position: absolute; left: 50%; translate: -50% 0;
  width: 3.4em; height: 3.4em;
  border-radius: 50%;
  background:
    radial-gradient(rgba(255,255,255,.3) .06em, transparent .07em) 0 0 / .4em .4em,
    radial-gradient(circle at 34% 28%, #8B9199, #2A2D31 74%);
  box-shadow: inset 0 0 .8em rgba(0,0,0,.8), 0 0 2em rgba(0,0,0,.75), 0 0 0 .1em rgba(255,255,255,.14);
}

/* ---------- 8. Projektor ---------- */
/* světlé tělo instalačního projektoru – lépe čitelné na tmavé scéně */
.projector__body {
  --w: 13em; --h: 5.6em; --d: 10em;
  --face: #B4B9C0; --face-s: #969CA4; --face-t: #D3D7DC; --face-b: #5F656C;
}
/* čelní panel: mírný odskok a spára */
.projector__body > .fr {
  background:
    linear-gradient(180deg, #C2C7CD 0 .5em, #ADB2B9 .5em 4.6em, #8E949B 4.6em);
  border: .12em solid #8E949B;
}
/* boční mřížky chlazení */
.projector__body > .lf, .projector__body > .rt {
  background-image:
    repeating-linear-gradient(90deg, transparent 0 .34em, rgba(0,0,0,.3) .34em .5em),
    linear-gradient(180deg, rgba(255,255,255,.16), transparent 55%);
}
/* horní kryt: spára a ovládací panel */
.projector__body > .tp {
  background-image:
    linear-gradient(90deg, transparent 0 1.1em, rgba(0,0,0,.16) 1.1em 1.25em, transparent 1.25em),
    linear-gradient(180deg, rgba(255,255,255,.28), transparent 40%);
}
/* objektiv v tubusu */
.projector__barrel {
  --w: 4.8em; --h: 4.8em; --d: 3.2em;
  --face: #2E333A; --face-s: #3A4048; --face-t: #464C55; --face-b: #23272C;
}
.projector__barrel > .fr {
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #0A0E12 0 1.5em, transparent 1.52em),
    radial-gradient(circle at 50% 50%, #4C525A 0 1.9em, transparent 1.92em),
    radial-gradient(circle at 50% 50%, #333940 0 2.4em, transparent 2.42em);
}
.projector__barrel > .lf, .projector__barrel > .rt, .projector__barrel > .tp {
  background-image: repeating-linear-gradient(90deg, transparent 0 .22em, rgba(0,0,0,.35) .22em .34em);
}
.projector__lens {
  position: absolute;
  width: 3em; height: 3em;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 36%, #F0F8FF 0 .4em, #7FB6E4 26%, #1B3D5A 60%, #060A0E 86%);
  box-shadow: inset 0 0 .5em rgba(0,0,0,.7), 0 0 2.6em .8em rgba(150,205,255,.5);
}
/* kontrolky na horním krytu */
.projector__leds { position: absolute; display: flex; gap: .5em; }
.projector__leds i { display: block; width: .42em; height: .42em; border-radius: 50%; background: #7F868E; }
.projector__leds i:first-child { background: #3FBF7E; box-shadow: 0 0 .7em #3FBF7E; }
/* Světelný kužel = dvě zkřížené plochy vedené po optické ose objektivu (+Z).
   Obě začínají v objektivu a končí přesně v rovině plátna, takže paprsek
   nemíří do strany a na plátno se trefí. */
.projector__fan {
  position: absolute;
  filter: blur(.4em);
  opacity: .8;
  animation: beamFlicker 5s ease-in-out infinite;
  pointer-events: none;
}
/* vodorovná plocha: výška elementu se rotací mapuje na osu Z */
.projector__fan--h {
  transform-origin: 50% 0;
  background: linear-gradient(180deg, rgba(178,218,255,.62), rgba(178,218,255,.14) 72%, rgba(178,218,255,.06));
  clip-path: polygon(45% 0, 55% 0, 100% 100%, 0 100%);
}
/* svislá plocha: šířka elementu se rotací mapuje na osu Z */
.projector__fan--v {
  transform-origin: 0 50%;
  background: linear-gradient(90deg, rgba(178,218,255,.5), rgba(178,218,255,.11) 72%, rgba(178,218,255,.05));
  clip-path: polygon(0 45%, 0 55%, 100% 100%, 100% 0);
}
@keyframes beamFlicker { 0%,100% { opacity: .74; } 45% { opacity: .92; } 72% { opacity: .64; } }

/* plátno – kolmo na optickou osu, ve stejné vzdálenosti jako konec kužele */
.projector__screen {
  position: absolute;
  background:
    linear-gradient(148deg, rgba(214,236,255,.5), rgba(120,170,225,.26) 58%, rgba(88,138,198,.18)),
    #0D1520;
  border: .16em solid rgba(206,232,255,.5);
  box-shadow: 0 0 3.5em rgba(140,195,255,.35);
  pointer-events: none;
}
.projector__legs { position: absolute; left: 1.4em; right: 1.4em; height: 1.2em; }
.projector__legs i { position: absolute; top: 0; width: 1em; height: 1.2em; background: #4A4F56; border-radius: 0 0 .2em .2em; }
.projector__legs i:first-child { left: 0; }
.projector__legs i:last-child  { right: 0; height: 1.6em; }

/* ---------- 9. Síťový switch ---------- */
.switch__body { --w: 28em; --h: 4em; --d: 10em; --face: #3A4048; --face-s: #23272B; --face-t: #4A5158; }
.switch__body .fr {
  background: linear-gradient(180deg, #33383E, #1E2124);
  border: .18em solid #3D4249;
}
.switch__ports {
  position: absolute; left: 1.4em; top: .58em;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: .2em;
  width: 20em; height: 2.6em;
}
.switch__ports i {
  position: relative; display: block;
  background: #0B0C0E;
  border-radius: .06em;
  box-shadow: inset 0 .1em .18em rgba(0,0,0,.95), 0 0 0 .04em rgba(255,255,255,.06);
}
.switch__ports i::after {
  content: '';
  position: absolute; left: .12em; top: .12em;
  width: .26em; height: .26em; border-radius: 50%;
  background: var(--dot, #3FBF7E);
  animation: portBlink 1.5s steps(1, end) infinite;
  animation-delay: calc(var(--i) * -.13s);
}
.switch__ports i:nth-child(5n) { --dot: #E0A63E; }
@keyframes portBlink { 0%, 52% { opacity: 1; box-shadow: 0 0 .4em var(--dot, #3FBF7E); } 53%, 100% { opacity: .1; box-shadow: none; } }
.switch__sfp { position: absolute; right: 1.3em; top: .7em; display: flex; gap: .34em; }
.switch__sfp i { display: block; width: 1.7em; height: 2.4em; background: #0B0C0E; border: .09em solid #43484F; }
.switch__ears { position: absolute; top: 0; width: 1.4em; height: 100%; background: #3D4249; }
.switch__ears--l { left: -1.4em; }
.switch__ears--r { right: -1.4em; }

/* ---------- 9b. Kamera (bullet CCTV) ---------- */
.cam__plate { --w: 1.8em; --h: 9em; --d: 9em; --face: #4A4F56; --face-s: #34383E; --face-t: #5A6068; }
.cam__arm{ --w: 6em; --h: 1.6em; --d: 1.6em; --face: #4A4F56; --face-s: #363A40; --face-t: #5C626A; }
.cam__body  { --w: 15em; --h: 6em; --d: 6em; --face: #52585F; --face-s: #3D4248; --face-t: #666D76; --face-b: #2A2D32; }
.cam__body > .rt {                     /* čelo s objektivem */
  background:
    radial-gradient(circle at 50% 50%, #0A1218 0 1.5em, transparent 1.55em),
    radial-gradient(circle at 44% 40%, #7FB6E0 0 .5em, #21506F 34%, #060A0E 62%, transparent 63%),
    radial-gradient(circle at 50% 50%, #23262A 0 2.5em, transparent 2.55em),
    #3A3F45;
}
.cam__shade { --w: 16em; --h: .8em; --d: 7em; --face: #5C626A; --face-s: #444A51; --face-t: #6E757E; }
.cam__led {
  position: absolute;
  width: .55em; height: .55em; border-radius: 50%;
  background: #E0503E;
  box-shadow: 0 0 .9em #E0503E;
  animation: portBlink 2.2s steps(1, end) infinite;
}

/* ---------- 10. Chytré žaluzie ---------- */
.blinds__frame {
  position: absolute; inset: 0;
  border: 1em solid #2E3237;
  background: linear-gradient(178deg, #6FA3C8 0%, #A8CBDF 40%, #E6DDC6 100%);
  overflow: hidden;
}
.blinds__frame::after {
  content: '';
  position: absolute; right: 16%; top: 15%;
  width: 5.5em; height: 5.5em; border-radius: 50%;
  background: radial-gradient(circle, #FFF6DC, rgba(255,224,150,.35) 55%, transparent 72%);
}
.blinds__slats {
  position: absolute; inset: 1em;
  display: flex; flex-direction: column; justify-content: space-between;
  transform-style: preserve-3d;
  perspective: 60em;
}
.blinds__slats i {
  display: block; height: 1.6em;
  background: linear-gradient(180deg, #EDEEEB, #B9BDBA);
  border-top: .06em solid rgba(255,255,255,.75);
  box-shadow: 0 .2em .55em rgba(0,0,0,.3);
  transform-origin: 50% 50%;
  transform: rotateX(var(--slat, 74deg));
  transition: transform .8s cubic-bezier(.16,.84,.34,1);
  transition-delay: calc(var(--i) * 55ms);
}
.blinds:hover .blinds__slats i,
.blinds:focus-within .blinds__slats i { --slat: 6deg; }
.blinds__rod {
  position: absolute; right: 1.7em; top: 1em;
  width: .32em; height: 62%;
  background: linear-gradient(180deg, #E0E3E1, #9DA19F);
}

/* ---------- 11. Karta s objektem ---------- */
.obj-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--stage-2);
  border: 1px solid var(--stage-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color .3s cubic-bezier(.16,.84,.34,1);
}
.obj-card:hover { border-color: rgba(255,255,255,.28); }
.obj-card .scene3d { background: radial-gradient(120% 105% at 50% 6%, #1C1F23, #0A0B0C 74%); }
.obj-card__body { padding: 22px 24px 26px; border-top: 1px solid var(--stage-line); }
.obj-card__body h3 { font-size: 1.02rem; margin-bottom: .35em; color: var(--stage-text); }
.obj-card__body p { margin: 0; font-size: .88rem; color: var(--stage-dim); }
.obj-card__kicker {
  font-family: var(--f-label);
  font-size: .62rem; letter-spacing: .16em; text-transform: uppercase;
  color: rgba(255,255,255,.44);
  display: block; margin-bottom: .9em;
}

/* rig na tmavém panelu */
.rig {
  border: 1px solid var(--stage-line);
  border-radius: var(--radius-lg);
  background: radial-gradient(110% 90% at 50% 0%, #16181C, #08090A 70%);
}

/* ---------- 12. Omezení pohybu ---------- */
@media (prefers-reduced-motion: reduce) {
  .ledbar .cells em, .ledwall__panels i::before, .switch__ports i::after,
  .projector__beam, .ledbar__beam, .mic { animation: none !important; }
  .ledbar .cells em { opacity: .6; }
  .scene3d__inner { transition: none; }
}