.intro-banner > .intro-stack {
  display: flex;
  justify-content: flex-end;
  align-items: stretch;
  width: 50%;
}

.mk-deck,
.mk-deck .mk-ph {
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
}

.mk-deck .mk-ph {
  pointer-events: none;
}

/* variant 1 — stacked deck */
.mk-deck.mk-v1 {
  --size: 1.25;
  --u: var(--size);
  --deck-span: calc(320px * 9 / 16);
  --gap: 1;
  position: relative;
  isolation: isolate;
  width: calc(320px * var(--u));
  aspect-ratio: 16 / 9;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  padding-right: 36px;
}

.mk-deck.mk-v1 .mk-card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(198px * var(--u));
  height: calc(128px * var(--u));
  margin: calc((-64px - 26px) * var(--u)) 0 0 calc(-99px * var(--u));
  border-radius: calc(8px * var(--u));
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 20px -14px rgba(0, 0, 0, .28);
  transform:
    translate(calc(var(--k, 0) * 17px * var(--u) * var(--gap)), calc(var(--k, 0) * 13px * var(--u) * var(--gap))) rotate(var(--r, 0deg)) scale(calc(1 - var(--k, 0) * 0.045));
  z-index: calc(100 - var(--k, 0));
  transition: transform .58s cubic-bezier(.34, 1.16, .5, 1), box-shadow .4s;
  will-change: transform;
}

.mk-deck.mk-v1 .mk-ph,
.mk-deck.mk-v4 .mk-ph,
.mk-deck.mk-v2 .mk-ph,
.mk-deck.mk-v3 .mk-ph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.mk-deck.mk-v1 .mk-card.is-front {
  box-shadow: 0 16px 32px -16px rgba(0, 0, 0, .34);
}

@media (min-width:992px) {
  .mk-deck.mk-v1:hover {
    --gap: 1.5;
  }

  .mk-deck.mk-v1:hover .mk-card:not(:hover) {
    transition-delay: calc(var(--k, 0) * 28ms);
  }

  .mk-deck.mk-v1 .mk-card:hover {
    z-index: 200;
    box-shadow: 0 18px 34px -16px rgba(0, 0, 0, .36);
    transform:
      translate(calc(var(--k, 0) * 17px * var(--u) * var(--gap)), calc(var(--k, 0) * 13px * var(--u) * var(--gap) - 12px * var(--u))) rotate(var(--r, 0deg)) scale(calc(1 - var(--k, 0) * 0.045 + 0.04));
    transition: transform .3s cubic-bezier(.22, .61, .36, 1), box-shadow .3s ease;
  }
}

.mk-deck.mk-v1 .mk-card.dealing {
  transform: translate(calc(-48px * var(--u)), calc(-58px * var(--u))) rotate(-7deg) scale(1.05);
  z-index: 99;
  box-shadow: 0 32px 56px -22px rgba(0, 0, 0, .42);
  transition: transform .3s cubic-bezier(.4, 0, .2, 1), box-shadow .3s;
}

/* variant 2 — diagonal cascade */
.mk-deck.mk-v4 {
  --size: 1.2;
  --u: var(--size);
  --dx: 34px;
  --dy: 44px;
  --deck-span: 331px;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  box-sizing: border-box;
  width: calc(360px * var(--u));
  height: calc(var(--deck-span) * var(--u));
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.mk-deck.mk-v4 .mk-card {
  position: absolute;
  left: calc(50% - (83px + 2.5 * var(--dx)) * var(--u));
  top: 0;
  width: calc(166px * var(--u));
  height: calc(111px * var(--u));
  border-radius: calc(8px * var(--u));
  overflow: hidden;
  background: #fff;
  box-shadow: 0 6px 18px -10px rgba(0, 0, 0, .26);
  transform:
    translate(calc(var(--k, 0) * var(--dx) * var(--u)), calc(var(--k, 0) * var(--dy) * var(--u))) scale(calc(0.875 + var(--k, 0) * 0.025));
  z-index: calc(10 + var(--k, 0));
  transition: transform .58s cubic-bezier(.34, 1.16, .5, 1), box-shadow .4s;
  will-change: transform;
}

.mk-deck.mk-v4 .mk-card.is-front {
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .34);
}

@media (min-width:992px) {
  .mk-deck.mk-v4 .mk-card:hover {
    z-index: 200;
    transform:
      translate(calc(var(--k, 0) * var(--dx) * var(--u) - 4px * var(--u)), calc(var(--k, 0) * var(--dy) * var(--u) - 8px * var(--u))) scale(calc(0.875 + var(--k, 0) * 0.025 + 0.02));
    transition: transform .35s cubic-bezier(.34, 1.04, .5, 1), box-shadow .35s;
  }
}

.mk-deck.mk-v4 .mk-card.exiting {
  transform:
    translate(calc((var(--k, 0) + 2) * var(--dx) * var(--u)), calc((var(--k, 0) + 2) * var(--dy) * var(--u))) scale(calc((0.875 + var(--k, 0) * 0.025) * 0.95));
  transition: transform .3s cubic-bezier(.4, 0, 1, 1);
}

/* variant 3 — mixed scatter */
.mk-deck.mk-v2 {
  --size: 1.2;
  --u: var(--size);
  --deck-span: 300px;
  position: relative;
  isolation: isolate;
  width: calc(300px * var(--u));
  aspect-ratio: 1 / 1;
  -webkit-tap-highlight-color: transparent;
}

.mk-deck.mk-v2 .mk-card {
  --cw: calc(168px * var(--u));
  --ch: calc(112px * var(--u));
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--cw);
  height: var(--ch);
  margin: calc(var(--ch) / -2) 0 0 calc(var(--cw) / -2);
  border-radius: calc(8px * var(--u));
  overflow: hidden;
  background: #fff;
  box-shadow: none;
  transform:
    translate(calc(var(--k, 0) * 8px * var(--u) + var(--ox, 0px)),
      calc(var(--k, 0) * 6px * var(--u) + var(--oy, 0px))) scale(calc(1 - var(--k, 0) * 0.04));
  z-index: var(--z, calc(100 - var(--k, 0)));
  transition: transform .62s cubic-bezier(.34, 1.12, .5, 1), box-shadow .4s;
  will-change: transform;
}

.mk-deck.mk-v2 .mk-card.mk-p {
  --cw: calc(88px * var(--u));
  --ch: calc(128px * var(--u));
}

.mk-deck.mk-v2 .mk-card.is-front {
  --cw: calc(220px * var(--u));
  --ch: calc(147px * var(--u));
  box-shadow: none;
}

@media (min-width:992px) {
  .mk-deck.mk-v2 .mk-card {
    transition: transform .5s cubic-bezier(.34, 1.08, .5, 1), filter .4s;
  }

  .mk-deck.mk-v2 .mk-card:hover {
    z-index: 200;
    filter: brightness(1.04);
    transform:
      translate(calc(var(--k, 0) * 8px * var(--u) + var(--ox, 0px)),
        calc(var(--k, 0) * 6px * var(--u) + var(--oy, 0px) - 8px * var(--u))) scale(1.03);
    transition: transform .28s cubic-bezier(.22, .61, .36, 1), filter .28s;
  }
}

/* variant 4 — asymmetric scatter */
.mk-deck.mk-v3 {
  --size: 1.2;
  --u: var(--size);
  --deck-span: 300px;
  position: relative;
  isolation: isolate;
  width: calc(300px * var(--u));
  aspect-ratio: 1 / 1;
  -webkit-tap-highlight-color: transparent;
}

.mk-deck.mk-v3 .mk-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  --cw: calc(168px * var(--u));
  --ch: calc(112px * var(--u));
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--cw);
  height: var(--ch);
  margin: calc(var(--ch) / -2) 0 0 calc(var(--cw) / -2);
  border-radius: calc(8px * var(--u));
  overflow: hidden;
  background: #fff;
  box-shadow: none;
  transform:
    translate(calc(var(--k, 0) * 8px * var(--u) + var(--ox, 0px)),
      calc(var(--k, 0) * 6px * var(--u) + var(--oy, 0px))) scale(calc(1 - var(--k, 0) * 0.04));
  z-index: var(--z, calc(100 - var(--k, 0)));
  transition: transform .62s cubic-bezier(.34, 1.12, .5, 1), box-shadow .4s;
  will-change: transform;
}

.mk-deck.mk-v3 .mk-card.is-front {
  --cw: calc(220px * var(--u));
  --ch: calc(147px * var(--u));
  box-shadow: none;
}

@media (min-width:992px) {
  .mk-deck.mk-v3 .mk-card {
    transition: transform .5s cubic-bezier(.34, 1.08, .5, 1), box-shadow .4s, filter .4s;
  }

  .mk-deck.mk-v3 .mk-card:hover {
    z-index: 200;
    filter: brightness(1.04);
    box-shadow: none;
    transform:
      translate(calc(var(--k, 0) * 8px * var(--u) + var(--ox, 0px)),
        calc(var(--k, 0) * 6px * var(--u) + var(--oy, 0px) - 8px * var(--u))) scale(1.03);
    transition: transform .28s cubic-bezier(.22, .61, .36, 1), box-shadow .28s, filter .28s;
  }
}

/* shared responsive scaling */
@media (max-width:991px) {
  .mk-deck.mk-v1,
  .mk-deck.mk-v2,
  .mk-deck.mk-v3,
  .mk-deck.mk-v4 {
    --u: calc(var(--size) * .9);
  }
}

@media (max-width:767px) {
  .mk-deck.mk-v1,
  .mk-deck.mk-v2,
  .mk-deck.mk-v3,
  .mk-deck.mk-v4 {
    --u: calc(var(--size) * .8);
  }
}

@media (max-width:479px) {
  .mk-deck.mk-v1,
  .mk-deck.mk-v2,
  .mk-deck.mk-v3,
  .mk-deck.mk-v4 {
    --u: calc(var(--size) * .66);
  }
}

@media (min-width:992px) {
  .intro-banner {
    align-items: stretch;
  }

  .intro-banner > .intro-stack {
    align-self: stretch;
    align-items: stretch;
    min-height: 0;
  }

  .intro-banner > .intro-stack .mk-deck {
    height: 100%;
    min-height: 0;
  }
}

/* tablet strip layout */
@media (max-width:991px) {
  .intro-banner > .intro-stack {
    width: 100%;
    justify-content: center;
  }

  .mk-deck.mk-v1,
  .mk-deck.mk-v2,
  .mk-deck.mk-v3,
  .mk-deck.mk-v4 {
    width: 100%;
    min-width: min(520px, 88vw);
    margin: 0 auto;
    padding: 0;
    aspect-ratio: 7 / 2;
    height: auto;
    min-height: 0;
    overflow: hidden;
    cursor: default;
    --u: calc(var(--size) * .9);
  }

  .mk-deck.mk-v4 {
    padding-top: 0;
  }

  .mk-deck.mk-v1 .mk-card,
  .mk-deck.mk-v2 .mk-card,
  .mk-deck.mk-v3 .mk-card,
  .mk-deck.mk-v4 .mk-card {
    width: 28%;
    height: auto;
    aspect-ratio: 3 / 2;
    margin: 0;
    top: 50%;
    left: calc(50% + (var(--k, 0) - 2) * 40%);
    transform: translate(-50%, -50%) rotate(var(--cr, 2deg));
    z-index: calc(10 - max(var(--k, 0) - 2, 2 - var(--k, 0)));
    transition: left .6s cubic-bezier(.34, 1.04, .5, 1),
      transform .6s cubic-bezier(.34, 1.04, .5, 1),
      box-shadow .3s;
  }

  .mk-deck.mk-v4 .mk-card {
    left: calc(50% + (var(--k, 0) - 2) * 36%);
  }

  .mk-deck.mk-v1 .mk-card.is-front,
  .mk-deck.mk-v3 .mk-card.is-front {
    box-shadow: 0 8px 20px -14px rgba(0, 0, 0, .28);
  }

  .mk-deck.mk-v1 .mk-card.dealing,
  .mk-deck.mk-v3 .mk-card.dealing {
    transform: translate(-50%, -50%) rotate(var(--cr, 0deg));
    box-shadow: 0 8px 20px -14px rgba(0, 0, 0, .28);
  }

  .mk-deck.mk-v2 .mk-card.is-front {
    box-shadow: none;
  }
}

@media (prefers-reduced-motion:reduce) {
  .mk-deck .mk-card,
  .mk-deck .mk-card.dealing,
  .mk-deck .mk-card.exiting {
    transition: none !important;
  }
}