/* Sticker slap — more.html only. Namespaced so board .sticker links stay intact. */

@property --p {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

#slap-stage {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  cursor: none;
}

.slap-hint,
.slap-ghost,
.slap-toggle-item {
  display: none;
}

@media only screen and (min-width: 769px) {
  html[data-slap="on"] #slap-stage {
    pointer-events: auto;
  }

  .slap-hint {
    display: block;
    position: fixed;
    bottom: 16px;
    left: 50%;
    top: auto;
    transform: translateX(-50%);
    z-index: 10000;
    margin: 0;
    padding: 8px 14px;
    width: max-content;
    max-width: none;
    border: 2px solid var(--frgd, #1f2a24);
    border-radius: 8px;
    background: #fff;
    color: var(--frgd, #1f2a24);
    font-family: var(--font-meta, inherit);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.35;
    text-align: center;
    white-space: nowrap;
    box-shadow: 2px 2px 0 var(--shadow, rgba(0, 0, 0, 0.2));
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.18s ease, visibility 0.18s ease;
  }

  html[data-slap="on"] .slap-hint {
    opacity: 1;
    visibility: visible;
  }

  .slap-ghost {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 45;
    display: none;
    width: 2rem;
    height: 2rem;
    margin: 0;
    padding: 0;
    border: 0;
    object-fit: contain;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
    opacity: 0.2;
    filter: grayscale(1);
    transform: translate(-50%, -50%);
    will-change: left, top, width, height;
  }

  html[data-slap="on"] .slap-ghost.is-ready {
    display: block;
  }
}

.slap-sticker {
  position: absolute;
  user-select: none;
  pointer-events: none;
  will-change: transform, opacity;
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.16))
    drop-shadow(0 5px 10px rgba(0, 0, 0, 0.01));

  --fold: calc(var(--minp) + var(--span) * var(--p));
  --half-plane: polygon(
    calc((var(--fold) * var(--u0) + var(--big) * var(--w0)) * 1px)
      calc((var(--fold) * var(--u1) + var(--big) * var(--w1)) * 1px),
    calc((var(--fold) * var(--u0) - var(--big) * var(--w0)) * 1px)
      calc((var(--fold) * var(--u1) - var(--big) * var(--w1)) * 1px),
    calc(
        (
            var(--fold) * var(--u0) - var(--big) * var(--w0) - var(--big) *
              var(--u0)
          ) *
          1px
      )
      calc(
        (
            var(--fold) * var(--u1) - var(--big) * var(--w1) - var(--big) *
              var(--u1)
          ) *
          1px
      ),
    calc(
        (
            var(--fold) * var(--u0) + var(--big) * var(--w0) - var(--big) *
              var(--u0)
          ) *
          1px
      )
      calc(
        (
            var(--fold) * var(--u1) + var(--big) * var(--w1) - var(--big) *
              var(--u1)
          ) *
          1px
      )
  );
}

/* After slap mode is off, stickers can be peeled away. */
html[data-slap="off"] .slap-sticker,
html:not([data-slap="on"]) .slap-sticker {
  pointer-events: auto;
  cursor: pointer;
}

html[data-slap="off"] .slap-sticker:hover,
html:not([data-slap="on"]) .slap-sticker:hover {
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.2))
    drop-shadow(0 6px 12px rgba(0, 0, 0, 0.12));
}

.slap-sticker__layer {
  position: absolute;
  inset: 0;
}

.slap-sticker__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.slap-sticker__flat {
  clip-path: var(--half-plane);
}

.slap-sticker__flap-clip {
  clip-path: var(--half-plane);
}

.slap-sticker__flap-inner {
  transform-origin: 0 0;
  transform: matrix(
    var(--a),
    var(--b),
    var(--b),
    var(--d),
    calc(2 * var(--fold) * var(--u0)),
    calc(2 * var(--fold) * var(--u1))
  );
}

.slap-sticker__flap-fill {
  -webkit-mask-image: var(--src);
  mask-image: var(--src);
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  mask-mode: alpha;
  background-image: linear-gradient(
    calc(var(--ca) * 1deg),
    #cdcdcd calc(var(--p) * 100%),
    #f3f3f3 calc((var(--p) + (1 - var(--p)) * 0.1) * 100%),
    #ffffff calc((var(--p) + (1 - var(--p)) * 0.45) * 100%),
    #f0f0f0 calc((var(--p) + (1 - var(--p)) * 0.82) * 100%),
    #c6c6c6 100%
  );
}

.slap-sticker__flap-shadow {
  filter: drop-shadow(
    calc(var(--u0) * var(--s) * -0.05 * (1 - var(--p)) * 1px)
      calc((var(--u1) * -0.05 + 0.04) * var(--s) * (1 - var(--p)) * 1px)
      calc(var(--s) * 0.025 * 1px) rgba(0, 0, 0, calc(0.35 * (1 - var(--p))))
  );
}

/* Bottom-right toggle — graffiti tag as the control. */
.slap-toggle-item {
  display: none;
}

@media only screen and (min-width: 769px) {
  .slap-toggle-item {
    display: block;
    position: fixed;
    rotate: 57deg;
    bottom: -36px;
    right: 45px;
    margin: 0 !important;
    padding: 0 !important;
    z-index: 10002 !important;
    pointer-events: auto;
    transition: bottom 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .slap-toggle-item:has(.slap-toggle[aria-pressed="true"]) {
    bottom: 12px;
  }

  @media (prefers-reduced-motion: reduce) {
    .slap-toggle-item {
      transition: none;
    }
  }

  .slap-toggle {
    position: relative;
    display: block;
    width: auto;
    height: auto;
    padding: 0;
    border: 0;
    background: none;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: transform 0.2s ease;
  }

  .slap-toggle img.graffiti {
    display: block;
    position: static;
    width: auto;
    height: 88px;
    max-width: min(280px, 42vw);
    margin: 0;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
    filter: drop-shadow(0 2px 0 rgba(0, 0, 0, 0.12))
      drop-shadow(2px 4px 0 rgba(0, 0, 0, 0.08));
    transition: filter 0.2s ease;
  }

  .slap-toggle:hover,
  .slap-toggle:focus-visible {
    outline: none;
  }

  .slap-toggle:hover img.graffiti,
  .slap-toggle:focus-visible img.graffiti {
    filter: drop-shadow(0 0 2px rgba(255, 30, 30, 1))
      drop-shadow(0 0 8px rgba(220, 0, 0, 0.95))
      drop-shadow(0 0 18px rgba(255, 40, 40, 0.8))
      drop-shadow(2px 4px 0 rgba(0, 0, 0, 0.1));
  }

  .slap-toggle[aria-pressed="true"] img.graffiti {
    filter: drop-shadow(0 0 2px rgba(255, 30, 30, 1))
      drop-shadow(0 0 10px rgba(220, 0, 0, 0.95))
      drop-shadow(0 0 20px rgba(255, 40, 40, 0.75))
      drop-shadow(2px 4px 0 rgba(0, 0, 0, 0.1));
  }

  .slap-toggle:focus-visible {
    outline: 2px solid var(--frgd);
    outline-offset: 6px;
    border-radius: 4px;
  }

  /* Counter-rotate so the tip stays upright while the tag is angled. */
  .slap-toggle::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 18px + 16px);
    right: -16px;
    width: max-content;
    max-width: 240px;
    padding: 8px 12px;
    border-radius: 8px;
    border: 2px solid var(--frgd);
    background: #fff;
    color: var(--frgd);
    font-family: var(--font-meta, inherit);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: 0;
    text-align: left;
    white-space: normal;
    box-shadow: 2px 2px 0 var(--shadow);
    opacity: 0;
    visibility: hidden;
    rotate: -57deg;
    transform: translateY(4px);
    transform-origin: bottom right;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    z-index: 10000;
  }

  .slap-toggle:hover::after,
  .slap-toggle:focus-visible::after {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}