/* =========================================================
   OneByZero – Merch page
   Builds on css/main.css (tokens, nav, buttons, hero background).
   Sections: layout · header · carousel · veil + spotlight · info panel ·
   foot · responsive
   ========================================================= */

/* ---------- Layout ---------- */
.merch {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  padding: calc(var(--nav-h) + 1.25rem) 0 2rem;
  overflow: hidden;
  isolation: isolate;
}
html.merch-lock {
  overflow: hidden;
}

/* ---------- Carousel ---------- */
.carousel {
  position: relative;
  height: clamp(400px, calc(100svh - 17rem), 760px);
  margin-top: 0.25rem;
  cursor: grab;
  touch-action: pan-y;
  -webkit-user-select: none;
  user-select: none;
}
.carousel.is-dragging {
  cursor: grabbing;
}
.carousel.is-pointer {
  cursor: pointer;
}

/* Lower canvas: the carousel. Faded at both edges so tees drift in and out of view. */
#merchCanvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0,
    #000 10%,
    #000 90%,
    transparent 100%
  );
  mask-image: linear-gradient(
    to right,
    transparent 0,
    #000 10%,
    #000 90%,
    transparent 100%
  );
}
/* Upper canvas: only the tee in the spotlight (same size and camera as the lower one) */
#spotCanvas {
  position: absolute;
  inset: 0;
  z-index: 60;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.carousel__nogl {
  position: absolute;
  left: 50%;
  top: 40%;
  z-index: 5;
  width: min(90%, 30rem);
  margin: 0;
  transform: translateX(-50%);
  color: var(--muted);
  text-align: center;
}

/* ---------- Veil + spotlight ---------- */
.veil {
  position: fixed;
  inset: 0;
  z-index: 50;
  cursor: grab;
  touch-action: none;
  background: radial-gradient(
    ellipse at 50% 42%,
    rgba(34, 26, 70, 0.3),
    rgba(3, 3, 8, 0.84) 75%
  );
  -webkit-backdrop-filter: blur(16px) saturate(0.85);
  backdrop-filter: blur(16px) saturate(0.85);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease);
}
.veil:active {
  cursor: grabbing;
}
.merch.is-focused .veil {
  opacity: 1;
  pointer-events: auto;
}

/* Cone of light from above, and a pool of light on the "floor" */
.carousel__beam {
  position: absolute;
  top: -14%;
  left: 50%;
  z-index: 55;
  width: min(70%, 760px);
  height: 122%;
  transform: translateX(-50%);
  background: linear-gradient(
    to bottom,
    rgba(214, 204, 255, 0.34),
    rgba(160, 190, 255, 0.1) 55%,
    transparent 88%
  );
  clip-path: polygon(41% 0, 59% 0, 100% 100%, 0 100%);
  filter: blur(18px);
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.9s var(--ease) 0.1s;
}
.carousel::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 12%;
  z-index: 56;
  width: min(54%, 560px);
  height: 90px;
  transform: translateX(-50%);
  background: radial-gradient(
    ellipse at 50% 50%,
    rgba(160, 150, 255, 0.34),
    transparent 70%
  );
  filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.9s var(--ease) 0.1s;
}
.merch.is-focused .carousel__beam,
.merch.is-focused .carousel::after {
  opacity: 1;
}

/* ---------- Info panel (shown while a tee is in the spotlight) ---------- */
.spot {
  position: absolute;
  left: 50%;
  bottom: 0.25rem;
  z-index: 70;
  width: min(100%, 34rem);
  padding: 0 1rem;
  text-align: center;
  transform: translate(-50%, 16px);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.5s var(--ease) 0.2s,
    transform 0.7s var(--ease) 0.2s;
}
.merch.is-focused .spot {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}
.spot__kicker {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.spot__name {
  margin: 0 0 0.25rem;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.spot__note {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}
.spot__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.8rem 1rem;
}
.spot__price {
  font-size: 1rem;
  font-weight: 600;
}

.seg {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
}
.seg button {
  padding: 0.45rem 0.95rem;
  border: 0;
  border-radius: 999px;
  background: none;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.3s,
    color 0.3s;
}
.seg button:hover {
  color: #fff;
}
.seg button.is-active {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}
.seg button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.spot-close {
  position: fixed;
  top: calc(var(--nav-h) + 0.75rem);
  right: clamp(1rem, 3vw, 2rem);
  z-index: 80;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.4s,
    background 0.3s;
}
.spot-close:hover {
  background: rgba(255, 255, 255, 0.15);
}
.spot-close:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}
.merch.is-focused .spot-close {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- Footer row ---------- */
.merch__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* Keyboard / screen-reader list of designs (visible when it has focus, or if WebGL is missing) */
.merch__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.merch__list button {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: none;
  cursor: pointer;
}
.merch__list.is-plain {
  position: static !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
}

/* Footer */
.footer--slim {
  padding: 1.5rem 0;
}
.footer--slim .footer__bottom {
  margin: 0;
  padding: 0;
  border: 0;
}

.footer__credit {
  display: block;
  color: var(--muted);
  font-size: 0.48rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .carousel {
    height: clamp(320px, 52svh, 460px);
  }
  .merch__foot > span {
    display: none;
  }
  .spot__note {
    display: none;
  }
  .spot__row {
    gap: 0.6rem 0.8rem;
  }
}