/* ******** 1 - paramètres **/
#supersash-filter {
  --shelf_count: 6;
  --shelf_height: calc(100dvh / var(--shelf_count));

  font-family: system-ui, sans-serif;

  /* reusable grain texture */
  --grain-opacity: 0.12; /* tweak 0.05 → 0.2 */
  --grain-size: 120px;
}

/* layout */
#shelves {
  width: 100%;
}

/* shelf */
.shelf {
  position: relative;
  isolation: isolate;
  min-height: var(--shelf_height);
  max-height: var(--shelf_height);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;

  transition: max-height 0.4s ease;

  --shelf_bg: initial;
  --drawer_color: initial;
}

/* title (critical: left+right to give it real width) */
.shelf_title {
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0; /* <-- important */
  right: 0; /* <-- important */
  height: var(--shelf_height);

  display: flex;
  align-items: center;
  justify-content: flex-end;

  padding-right: 0rem;

  font-size: calc(var(--shelf_height) * 0.75);
  line-height: 1.5;
  font-weight: 900;

  color: var(--title_color);
  white-space: nowrap;
  pointer-events: none;
  text-align: right;

  overflow: hidden; /* <-- constrain marquees */

  /* uppercase category titles only */    
  span {
    text-transform: uppercase;
    letter-spacing: 0.05em; /* optional, feels nicer */
  }
}


/* ******** 2 - grain **/

/* FILM GRAIN — SAFE BASELINE */
.shelf:not(.shelf--motd)::after {
  content: "";
  position: absolute;
  inset: -50%;
  pointer-events: none;
  z-index: 1;

  filter: url(#noiseFilter);
  opacity: 0.35;

  /* NO animation by default */
}
@supports (animation-timeline: scroll()) or (not (-webkit-touch-callout: none)) {
  .shelf:not(.shelf--motd)::after {
    animation: grain_shift 0.35s steps(1) infinite;
  }
}

@keyframes grain_shift {
  0% {
    transform: translate(0px, 0px);
  }
  10% {
    transform: translate(-8px, -6px);
  }
  20% {
    transform: translate(-12px, 6px);
  }
  30% {
    transform: translate(6px, -12px);
  }
  40% {
    transform: translate(-6px, 14px);
  }
  50% {
    transform: translate(-14px, 6px);
  }
  60% {
    transform: translate(14px, 0px);
  }
  70% {
    transform: translate(0px, 10px);
  }
  80% {
    transform: translate(-16px, 0px);
  }
  90% {
    transform: translate(10px, 6px);
  }
  100% {
    transform: translate(6px, 0px);
  }
}


/* ******** 3 - clignotement **/
/* harsh blinking text (contact only): 1s on, 1s off */
.shelf_text_flash {
  animation: contact_flash 2s steps(1, end) infinite;
}

@keyframes contact_flash {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
  100% {
    opacity: 1;
  }
}