/* ======================================================
   World Cup 2026 Sticker Book — style.css
   ====================================================== */

:root {
  --book-h: 100dvh; /* overridden by JS on mobile with exact window.innerHeight */
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  background: #1a0a00;
  min-height: 100vh;
}

/* ── Wrapper ── */
.book-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  padding: 16px 20px;
  background: radial-gradient(ellipse at center, #2e1505 0%, #0e0600 100%);
}

/* ── Title ── */
.book-title {
  margin-bottom: 16px;
  text-align: center;
  line-height: 0;
}

.book-title img {
  max-height: clamp(80px, 16vw, 80px);
  width: auto;
  filter: drop-shadow(0 0 20px rgba(245, 200, 66, 0.4)) drop-shadow(2px 2px 0 #7a3d00);
}

/* ── Page indicator ── */
.page-indicator {
  font-size: 13px;
  color: #c8a060;
  letter-spacing: 2px;
  font-weight: 600;
  text-transform: uppercase;
}

/* ── Book container (turn.js sets width/height via inline styles) ── */
.book-container {
  position: relative;
}

/* ── Individual page (turn.js manages position/size) ── */
.page {
  background: #fef9f0;
  /* NOTE: overflow must NOT be hidden here — turn.js's fold/gradient
     elements extend beyond the page rect during the flip animation.   */
}


/* ── Book outer wrapper (positions mobile overlay) ── */
.book-outer {
  position: relative;
}

/* ── Mobile-only navigation overlay ── */
.mobile-nav {
  display: none; /* shown only inside mobile media query */
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  pointer-events: none;
  padding: 32px 16px 20px;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.65) 100%);
}

.mobile-nav-btn {
  pointer-events: auto;
  background: rgba(245, 200, 66, 0.2);
  border: 2px solid #f5c842;
  color: #f5c842;
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 20px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 10px 26px;
  border-radius: 4px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  font-variant-emoji: text; /* prevent iOS from substituting emoji glyphs */
}

.mobile-nav-btn:active {
  background: rgba(245, 200, 66, 0.4);
}

.mobile-nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.mobile-page-num {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 11px;
  color: #f5c842;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ── Mobile title bar (top overlay, mirrors nav gradient at bottom) ── */
.mobile-title-bar {
  display: none; /* shown only inside mobile media query */
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  pointer-events: none;
  padding: 10px 16px 16px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 8px;
  background: linear-gradient(to top, transparent 0%, rgba(0,0,0,0.65) 100%);
}

.mobile-title-bar img {
  width: auto;
  /* filter: drop-shadow(0 0 10px rgba(245, 200, 66, 0.5)) drop-shadow(2px 2px 0 #7a3d00); */
}

.mobile-title-img {
  max-height: 40px;
  justify-self: center;
}

.mobile-corner-logo {
  justify-self: start;
  pointer-events: auto;
  display: block;
}

.mobile-corner-logo img {
  max-height: 32px;
  display: block;
}

/* ── Mobile hamburger menu button ── */
.mobile-menu-btn {
  pointer-events: auto;
  justify-self: end;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
background: rgb(255 255 255 / 0%);
    border: none;
  border-radius: 6px;
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.mobile-menu-btn:active {
  background: rgba(255, 255, 255, 0.3);
}

/* ── Mobile share dropdown ── */
.mobile-share-menu {
  display: none;
  position: absolute;
  top: 54px;
  right: 16px;
  z-index: 10000;
  flex-direction: column;
  gap: 10px;
  padding: 10px;
  background: rgb(45 76 252 / 70%);
  border: none;
  border-radius: 10px;
  pointer-events: auto;
}

.mobile-share-link {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: #ffffff;
  font-size: 16px;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.mobile-share-link:active {
  background: rgba(255, 255, 255, 0.25);
}

/* ── Page content ── */
.page-content {
  width: 100%;
  height: 100%;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  container-type: inline-size;
  /*
    Bauhaus tile: 4 coloured quadrants (periwinkle / red / green / sky-blue)
    with large circles at every intersection point (lime at tile-centre,
    orange at tile-corners). The circles are large enough to arc across
    all four neighbouring cells, matching the reference pattern.
  */
  background-image: url('img/backg.png');
  background-size: 370px auto;
  background-repeat: repeat;
}


/* ── Page header row ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
  flex-shrink: 0;
}

/* On the left page of a desktop spread, mirror the header so the page
   number sits on the outer edge and the brand sits near the spine. */
.page.even .page-header {
  flex-direction: row-reverse;
}

.page.even .page-header .page-label:not(.page-brand) {
  color: #043d3b;
}

.page-label {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: #fcfcfc;
      letter-spacing: 1px;
    text-transform: uppercase;
}

.page-brand {
  color: #ffffff;
}

.page-footer-hint {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: #ffffff;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: center;
  flex-shrink: 0;
  padding: 0 4px;
  position: relative;
  top: -12px;
}

/* ── Sticker grid ── */
.sticker-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 12px;
  flex: 1;
  min-height: 0;
}

/* ── Sticker frame — gradient outer ring (background set per-player inline) ── */
.sticker-frame {
  display: block;          /* ensure <a> tag behaves as block grid item */
  text-decoration: none;   /* suppress underline when used as <a> */
  justify-self: center;
  align-self: center;
  width: 100%;
  max-height: 100%;
  aspect-ratio: 9 / 16;
  /* border-radius: 11px;   8px sticker + 3px padding */
  padding: 3px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
}

/* ── Sticker card ── */
.sticker {
  /* border-radius: 8px; */
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.9);
  width: 100%;
  height: 100%;
}

.sticker-inner {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 8px;
  position: relative;
}

/* texture overlays */
.sticker-texture {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.03) 0px,
    rgba(255, 255, 255, 0.03) 2px,
    transparent 2px,
    transparent 10px
  );
  pointer-events: none;
}

.sticker-shine {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 35%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), transparent);
  pointer-events: none;
}

.sticker-shadow {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 40%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
  pointer-events: none;
}

/* ══════════════════════════════════════════════════════
   Holo effects — all sticker cards
   ══════════════════════════════════════════════════════ */

/* Base variables (cascade to all holo layers) */
.holo-sticker {
  transition: transform 0.15s ease-out;
  --pointer-x: 50%;
  --pointer-y: 50%;
  --background-x: 50%;
  --background-y: 50%;
  --pointer-from-left: 0.5;
  --pointer-from-top: 0.5;
  --pointer-from-center: 0;
  --card-opacity: 0;

  --sunpillar-clr-1: hsl(2,   100%, 73%);
  --sunpillar-clr-2: hsl(53,  100%, 69%);
  --sunpillar-clr-3: hsl(93,  100%, 69%);
  --sunpillar-clr-4: hsl(176, 100%, 76%);
  --sunpillar-clr-5: hsl(228, 100%, 74%);
  --sunpillar-clr-6: hsl(283, 100%, 73%);

  --r-clr-1: hsl(0,   57%, 37%);
  --r-clr-2: hsl(40,  53%, 39%);
  --r-clr-3: hsl(90,  60%, 35%);
  --r-clr-4: hsl(180, 60%, 35%);
  --r-clr-5: hsl(180, 60%, 35%);
  --r-clr-6: hsl(210, 57%, 39%);
  --r-clr-7: hsl(280, 55%, 31%);

  --violet: #a040de;
  --blue:   #3d80ff;
  --green:  #40de80;
  --yellow: #ffe040;
  --red:    #ff4040;
}

/* Base layer geometry */
.holo-layer-shine,
.holo-layer-glare {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
}
.holo-layer-shine { z-index: 10; }
.holo-layer-glare { z-index: 11; }

/* Pseudo-elements used by several effects */
.holo-layer-shine::before,
.holo-layer-shine::after,
.holo-layer-glare::before,
.holo-layer-glare::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ── 1. Reverse Holo ─────────────────────────────────── */
.holo-reverse .holo-layer-shine {
  background-image:
    radial-gradient(circle at var(--pointer-x) var(--pointer-y),
      #fff 5%, #000 50%, #fff 80%),
    linear-gradient(-45deg, #000 15%, #fff, #000 85%);
  background-blend-mode: soft-light, difference;
  background-size: 120% 120%, 200% 200%;
  background-position:
    center center,
    calc(100% * var(--pointer-from-left)) calc(100% * var(--pointer-from-top));
  filter: brightness(0.45) contrast(1.2) saturate(0.8);
  mix-blend-mode: color-dodge;
  opacity: calc((0.7 * var(--card-opacity)) - (0.2 * var(--pointer-from-center)));
}
.holo-reverse .holo-layer-glare {
  background-image: radial-gradient(
    farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(0,0%,100%,0.6) 10%,
    hsla(0,0%,100%,0.3) 20%,
    hsla(0,0%,0%,0.5) 90%);
  filter: brightness(0.5) contrast(1.2);
  mix-blend-mode: overlay;
  opacity: calc(0.5 * var(--card-opacity));
}

/* ── 2. Holofoil Rare ────────────────────────────────── */
.holo-rare .holo-layer-shine {
  background-image:
    repeating-linear-gradient(110deg,
      var(--violet), var(--blue), var(--green), var(--yellow), var(--red),
      var(--violet), var(--blue), var(--green), var(--yellow), var(--red),
      var(--violet), var(--blue), var(--green), var(--yellow), var(--red)),
    repeating-linear-gradient(90deg, #000 0, #000 2px, #555 2px, #555 4px);
  background-position:
    calc(((50% - var(--background-x)) * 2.6) + 50%) calc(((50% - var(--background-y)) * 3.5) + 50%),
    center center;
  background-size: 400% 400%, cover;
  background-blend-mode: overlay;
  filter: brightness(0.7) contrast(1.1) saturate(1.2);
  mix-blend-mode: color-dodge;
  opacity: var(--card-opacity);
}
.holo-rare .holo-layer-shine::before {
  background-image:
    repeating-linear-gradient(90deg,
      #000 0%, #000 3%, rgba(100,100,100,1) 4.5%,
      rgba(100,100,100,1) 6%, #000 7.5%, #000 14%),
    repeating-linear-gradient(90deg,
      #000 0%, #000 3%, rgba(100,100,100,1) 4.5%,
      rgba(100,100,100,1) 6%, #000 7.5%, #000 10%);
  background-position:
    calc((((50% - var(--background-x)) * 1.65) + 50%) + (var(--background-y) * 0.5)) var(--background-x),
    calc((((50% - var(--background-x)) * -0.9) + 50%) - (var(--background-y) * 0.75)) var(--background-y);
  background-size: 200% 200%, 200% 200%;
  background-blend-mode: screen;
  filter: brightness(0.8) contrast(1.2);
  mix-blend-mode: hard-light;
}
.holo-rare .holo-layer-shine::after {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(0,0%,90%,0.8) 0%, hsla(0,0%,78%,0.1) 25%, hsl(0,0%,0%) 90%);
  mix-blend-mode: luminosity;
  filter: brightness(0.6) contrast(4);
}
.holo-rare .holo-layer-glare {
  opacity: calc(var(--card-opacity) * .8);
  filter: brightness(0.8) contrast(1.5);
  mix-blend-mode: overlay;
}
.holo-rare .holo-layer-glare::after {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsl(180,100%,95%) 5%, hsla(0,0%,39%,0.25) 55%, hsla(0,0%,0%,0.36) 110%);
  mix-blend-mode: overlay;
  filter: brightness(.6) contrast(3);
}

/* ── 3. Galaxy / Cosmos ──────────────────────────────── */
.holo-cosmos .holo-layer-shine {
  background-image:
    repeating-linear-gradient(82deg,
      hsl(53,65%,60%) 4%, hsl(93,56%,50%) 8%, hsl(176,54%,49%) 12%,
      hsl(228,59%,55%) 16%, hsl(283,60%,55%) 20%, hsl(326,59%,51%) 24%,
      hsl(326,59%,51%) 28%, hsl(283,60%,55%) 32%, hsl(228,59%,55%) 36%,
      hsl(176,54%,49%) 40%, hsl(93,56%,50%) 44%, hsl(53,65%,60%) 48%),
    radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
      hsla(180,100%,89%,0.5) 5%, hsla(180,14%,57%,0.3) 40%, hsl(0,0%,0%) 130%);
  background-blend-mode: color-burn, multiply;
  background-size: 400% 900%, cover;
  background-position:
    calc(10% + (var(--pointer-from-left) * 80%)) calc(10% + (var(--pointer-from-top) * 80%)),
    center center;
  filter: brightness(0.4) contrast(1) saturate(.8);
  mix-blend-mode: color-dodge;
  opacity: var(--card-opacity);
}
.holo-cosmos .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(204,100%,95%,0.8) 5%, hsla(250,15%,20%,1) 150%);
  filter: brightness(.75) contrast(2) saturate(2);
  mix-blend-mode: overlay;
  opacity: calc(var(--card-opacity) * (0.25 + var(--pointer-from-center)));
}
.holo-cosmos .holo-layer-glare::after {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsl(280,100%,96%) 5%, hsl(0,0%,10%) 60%);
  filter: brightness(.75) contrast(2.5) saturate(2);
  mix-blend-mode: soft-light;
  opacity: calc(1 - var(--pointer-from-top) * .75);
}

/* ── 4. Radiant ──────────────────────────────────────── */
.holo-radiant .holo-layer-shine {
  background-image:
    radial-gradient(farthest-corner ellipse
      at calc((var(--pointer-x) * 0.5) + 25%) calc((var(--pointer-y) * 0.5) + 25%),
      hsl(0,0%,95%) 20%, hsl(175,100%,90%) 130%),
    repeating-linear-gradient(45deg,
      hsl(0,0%,10%) 0%, hsl(0,0%,20%) 1.2%, hsl(0,0%,35%) 2.4%,
      hsl(0,0%,50%) 4.8%, hsl(0,0%,35%) 6%, hsl(0,0%,10%) 9.6%, hsl(0,0%,0%) 12%),
    repeating-linear-gradient(-45deg,
      hsl(0,0%,10%) 0%, hsl(0,0%,20%) 1.2%, hsl(0,0%,35%) 2.4%,
      hsl(0,0%,50%) 4.8%, hsl(0,0%,35%) 6%, hsl(0,0%,10%) 9.6%, hsl(0,0%,0%) 12%);
  background-size: cover, 210% 210%, 210% 210%;
  background-position:
    center,
    calc(((var(--background-x) - 50%) * 1.5) + 50%) calc(((var(--background-y) - 50%) * 1.5) + 50%),
    calc(((var(--background-x) - 50%) * 1.5) + 50%) calc(((var(--background-y) - 50%) * 1.5) + 50%);
  background-blend-mode: exclusion, darken, color-dodge;
  filter: brightness(0.5) contrast(2) saturate(1.2);
  mix-blend-mode: color-dodge;
  opacity: calc(var(--card-opacity) * 0.6);
}
.holo-radiant .holo-layer-shine::after {
  background-image: repeating-linear-gradient(55deg,
    hsl(3,95%,85%) 0px, hsl(207,100%,84%) 200px, hsl(29,100%,85%) 400px,
    hsl(160,100%,86%) 600px, hsl(309,94%,87%) 800px, hsl(188,95%,85%) 1000px,
    hsl(3,95%,85%) 1200px);
  background-size: 400% 100%;
  background-position:
    calc(((var(--background-x) - 50%) * -2.5) + 50%) calc(((var(--background-y) - 50%) * -2.5) + 50%);
  filter: brightness(.5) contrast(1.8) saturate(1.5);
  mix-blend-mode: color-dodge;
  background-blend-mode: hard-light;
}
.holo-radiant .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(0,0%,100%,0.33) 0%, hsl(0,0%,25%) 110%);
  filter: brightness(1) contrast(1.2);
  mix-blend-mode: hard-light;
  opacity: calc(var(--card-opacity) * 0.5);
}

/* ── 5. Trainer Gallery ──────────────────────────────── */
.holo-trainer .holo-layer-shine {
  mix-blend-mode: color-dodge;
  background-image: repeating-linear-gradient(-22deg,
    hsla(283,49%,60%,0.75) 5%, hsla(2,74%,59%,0.75) 10%,
    hsla(53,67%,53%,0.75) 15%, hsla(93,56%,52%,0.75) 20%,
    hsla(176,38%,50%,0.75) 25%, hsla(228,100%,77%,0.75) 30%,
    hsla(283,49%,61%,0.75) 35%);
  background-blend-mode: color-dodge;
  background-size: 300% 400%;
  background-position: 0% var(--background-y);
  filter: brightness(calc((var(--pointer-from-center)*0.3) + 0.5)) contrast(1.3) saturate(0.8);
  opacity: calc(var(--card-opacity) * 0.6);
}
.holo-trainer .holo-layer-shine::after {
  background-image: radial-gradient(farthest-corner ellipse
    at calc((var(--pointer-x) * 0.5) + 25%) calc((var(--pointer-y) * 0.5) + 25%),
    hsl(0,0%,100%) 5%, hsla(300,100%,11%,0.6) 40%, hsl(0,0%,22%) 120%);
  background-size: 400% 500%;
  filter: brightness(calc((var(--pointer-from-center)*0.2) + 0.4)) contrast(.85) saturate(1.1);
  mix-blend-mode: hard-light;
}
.holo-trainer .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(0,0%,100%,1) 10%, hsla(0,0%,100%,0.6) 35%, hsla(180,11%,35%,1) 60%);
  mix-blend-mode: soft-light;
  opacity: calc(var(--card-opacity) * 0.5);
}

/* ── 6. Rainbow Rare ─────────────────────────────────── */
.holo-rainbow .holo-layer-shine {
  mix-blend-mode: color-dodge;
  background-image:
    linear-gradient(-45deg, var(--r-clr-1), var(--r-clr-5)),
    linear-gradient(-30deg,
      var(--r-clr-1), var(--r-clr-2), var(--r-clr-3), var(--r-clr-4),
      var(--r-clr-5), var(--r-clr-6), var(--r-clr-7),
      var(--r-clr-1), var(--r-clr-2), var(--r-clr-3), var(--r-clr-4),
      var(--r-clr-5), var(--r-clr-6), var(--r-clr-7),
      var(--r-clr-1), var(--r-clr-2), var(--r-clr-3), var(--r-clr-4),
      var(--r-clr-5), var(--r-clr-6), var(--r-clr-7), var(--r-clr-1));
  background-blend-mode: luminosity;
  background-size: 200% 200%, 400% 400%;
  background-position:
    calc(25% + (50% * var(--pointer-from-left))) calc(25% + (50% * var(--pointer-from-top))),
    calc(25% + (var(--pointer-x) / 2)) calc(25% + (var(--pointer-y) / 2));
  filter: brightness(calc((var(--pointer-from-center)*0.25) + 0.6)) contrast(1.3) saturate(0.65);
  opacity: calc(var(--card-opacity) * 0.6);
}
.holo-rainbow .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsl(0,0%,80%), hsla(187,10%,85%,0.25) 30%, hsl(197,6%,25%) 120%);
  filter: brightness(.9) contrast(1.75);
  opacity: calc(var(--pointer-from-center) * var(--card-opacity) * 0.9);
  mix-blend-mode: hard-light;
}

/* ── 7. Secret Rare Gold ─────────────────────────────── */
.holo-secret .holo-layer-shine {
  background-image:
    conic-gradient(
      var(--sunpillar-clr-4), var(--sunpillar-clr-5), var(--sunpillar-clr-6),
      var(--sunpillar-clr-1), var(--sunpillar-clr-4)),
    radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
      hsla(150,0%,0%,.98) 10%, hsla(0,0%,95%,.15) 90%);
  background-size: cover, cover;
  background-position: center, center;
  background-blend-mode: soft-light, overlay;
  mix-blend-mode: color-dodge;
  filter: brightness(calc(0.4 + (var(--pointer-from-center) * 0.2))) contrast(1) saturate(2.7);
  opacity: var(--card-opacity);
}
.holo-secret .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsla(45,8%,80%,0.3) 0%, hsl(22,15%,12%) 180%);
  filter: brightness(1.3) contrast(1.5);
  mix-blend-mode: hard-light;
  opacity: var(--card-opacity);
}

/* ── 8. Pokémon V (sunpillar stripes) ────────────────── */
.holo-v .holo-layer-shine {
  mix-blend-mode: color-dodge;
  background-image:
    repeating-linear-gradient(0deg,
      var(--sunpillar-clr-1) 5%, var(--sunpillar-clr-2) 10%, var(--sunpillar-clr-3) 15%,
      var(--sunpillar-clr-4) 20%, var(--sunpillar-clr-5) 25%, var(--sunpillar-clr-6) 30%,
      var(--sunpillar-clr-1) 35%),
    repeating-linear-gradient(133deg,
      #0e152e 0%, hsl(180,10%,60%) 3.8%, hsl(180,29%,66%) 4.5%,
      hsl(180,10%,60%) 5.2%, #0e152e 10%, #0e152e 12%),
    radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
      hsla(0,0%,0%,0.1) 12%, hsla(0,0%,0%,0.15) 20%, hsla(0,0%,0%,0.25) 120%);
  background-blend-mode: screen, hue, hard-light;
  background-size: 200% 700%, 300% 100%, 200% 100%;
  background-position:
    0% var(--background-y),
    var(--background-x) var(--background-y),
    var(--background-x) var(--background-y);
  filter: brightness(.4) contrast(1.5) saturate(.85);
  opacity: calc(var(--card-opacity) * 0.6);
}
.holo-v .holo-layer-glare {
  background-image: radial-gradient(farthest-corner at var(--pointer-x) var(--pointer-y),
    hsl(0,0%,100%) 0%, hsla(210,3%,54%,0.33) 45%, hsla(0,0%,20%,0.9) 130%);
  opacity: calc(var(--card-opacity) * .3);
  mix-blend-mode: hard-light;
  filter: brightness(.9) contrast(1.2);
}

/* ── Sticker text elements ── */
.sticker-number {
  position: absolute;
  top: 5px;
  left: 7px;
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
  text-transform: uppercase;
  line-height: 1;
  z-index: 3;
  text-shadow: rgb(104 145 154) -1px -1px 0px, rgb(0, 0, 0) 1px -1px 0px, rgb(0, 0, 0) -1px 1px 0px, rgb(0, 0, 0) 1px 1px 0px;

}

.sticker-info {
  position: relative;
  z-index: 2;
  text-align: center;
  display: none;
}

.sticker-flag {
  font-size: clamp(8px, 3.5cqw, 18px);
  margin-bottom: 2px;
  display: block;
  line-height: 1;
}

.sticker-name {
  font-size: clamp(5px, 1.8cqw, 10px);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
  text-align: center;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
  letter-spacing: 0.5px;
  line-height: 1.2;
  padding: 0 4px;
  text-transform: uppercase;
  display: block;
}

.sticker-pos {
  font-size: clamp(4px, 1.3cqw, 8px);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 1px;
  text-transform: uppercase;
  display: block;
}

/* ── Spine ── */
.spine {
  position: absolute;
  left: calc(50% - 6px);
  top: 0;
  width: 12px;
  height: 100%;
  background: linear-gradient(to right, #5a2d00, #c06010, #5a2d00);
  z-index: 9999;
  pointer-events: none;
  transition: opacity 0.15s;
}

.spine.is-flipping {
  opacity: 0;
}

@media (max-width: 500px) {
  .spine { display: none; }
}

/* ── Corner logo (left of book, aligned with page baseline) ── */
.corner-logo {
  position: absolute;
  right: 100%;
  bottom: 0;
  margin-right: clamp(16px, 3vw, 48px);
  width: clamp(50px, 7vw, 130px);
  display: block;
  pointer-events: auto;
}

.corner-logo img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Book floor shadow ── */
.book-shadow {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  height: 20px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.5) 0%, transparent 70%);
  filter: blur(6px);
  pointer-events: none;
}

/* ── Navigation buttons ── */
.nav-buttons {
  display: flex;
  align-items: center;
  margin-top: 28px;
  width: 100%;
}

.nav-edge {
  flex: 1;
  display: flex;
}

.nav-edge-left  { justify-content: flex-end;   padding-right: 16px; }
.nav-edge-right { justify-content: flex-start;  padding-left:  16px; }

.nav-center {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-btn {
  background: rgba(245, 200, 66, 0.15);
  border: 1.5px solid #f5c842;
  color: #f5c842;
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 7px 18px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.nav-btn:hover:not(:disabled) {
  background: rgba(245, 200, 66, 0.3);
  transform: scale(1.05);
}

.nav-btn:active:not(:disabled) {
  transform: scale(0.97);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

/* ── Intro pages ── */
.intro-lead p:first-child,
.intro-instructions p:first-child {
  font-family: 'Blacker Pro Display', serif;
  font-weight: 400;
  font-style: normal;
}

.intro-page,
.intro-page * {
  font-family: 'Firme', serif;
    font-weight: 500;
    font-style: normal;
}

.intro-page {
  position: relative;
}

.intro-date-wrap {
  position: absolute;
  top: 58%;
  left: 0;
  right: 0;
  text-align: center;
}

.intro-date {
  font-family: 'Firme', sans-serif;
  font-weight: 900;
  font-size: clamp(10px, 2.5cqw, 16px);
  text-transform: uppercase;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.75);
  text-shadow: none;
}

.intro-logo-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 2.5cqw, 24px);
  padding: 0 16px;
  text-align: center;
}

.intro-logo-img {
  width: clamp(140px, 60cqw, 320px);
  height: auto;
  margin: 15px;
}

.intro-logo-title {
  font-family: 'Firme', sans-serif;
  font-weight: 600;
  font-size: clamp(11px, 4cqw, 22px);
  color: #ffffff;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
}

.intro-logo-subtitle {
  font-family: 'Firme', sans-serif;
  font-weight: 600;
  font-size: clamp(16px, 6.5cqw, 32px);
  line-height: 1.2;
  color: #ffffff;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
}

.intro-text-wrap {
  width: 60%;
  height: 75%;
  margin: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 32px;
  gap: 20px;
  background-color: rgba(255, 255, 255, 0.94);
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 18px,
    rgba(0, 0, 0, 0.025) 18px,
    rgba(0, 0, 0, 0.025) 19px
  );
  border: 4px solid #8b0000;
  border-radius: 8px;
}

.intro-lead p:first-child {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: clamp(13px, 5cqw, 28px);
  color: #2d1000;
  text-shadow: none;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: center;
}

.intro-lead p {
    font-family: 'Firme', sans-serif;
    font-weight: 500;
    font-size: clamp(17px, 3.2cqw, 36px);
    /* line-height: 25px; */
    color: rgba(40, 20, 0, 0.80);
    text-align: center;
    line-height: 1.3;
    text-transform: unset;
    text-shadow: none;
  }

.intro-instructions p:first-child {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: clamp(12px, 4cqw, 24px);
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: center;
}

.intro-instructions p {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: clamp(9px, 2.2cqw, 13px);
  color: rgba(255, 255, 255, 0.82);
  text-align: center;
  line-height: 1.7;
  text-transform: uppercase;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* ── Last page — credits ── */
.last-page {
  display: flex;
  align-items: center;
  justify-content: center;
}

.credits-frame {
  display: flex;
  flex-direction: column;
  min-height: 0;
  width: min(100%, 380px);
  padding: 10px;
  border-radius: 22px;
  /* background-image: repeating-conic-gradient(
    from 0deg,
    #a040de 0deg 90deg,
    #ff4040 90deg 180deg,
    #40de80 180deg 270deg,
    #3d80ff 270deg 360deg
  );
  background-size: 24px 24px; */
}

.credits-wrap {
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(4px, 1.6cqw, 14px);
  padding: clamp(10px, 4cqw, 32px) clamp(10px, 4cqw, 28px);
  text-align: center;
  background-color: rgba(255, 255, 255, 0.95);
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 18px,
    rgba(0, 0, 0, 0.025) 18px,
    rgba(0, 0, 0, 0.025) 19px
  );
  border: 3px solid #cc2200;
  border-radius: 14px;
  justify-content: center;
}

/* Subdued foil — reuses the Rainbow Rare holo layers/JS, but the
   color-dodge/hard-light blends those rely on are invisible against this
   light card, so swap to `multiply` at low opacity and drop the
   pointer-tilt transform from holoUpdate(). */
.credits-wrap.holo-sticker {
  transform: none !important;
}

.credits-wrap.holo-rainbow .holo-layer-shine {
  mix-blend-mode: multiply;
  opacity: calc(0.05 + (var(--card-opacity) * 0.07));
}

.credits-wrap.holo-rainbow .holo-layer-glare {
  mix-blend-mode: multiply;
  opacity: calc(var(--card-opacity) * 0.08);
}

.credits-wrap .holo-layer-shine,
.credits-wrap .holo-layer-glare {
  border-radius: inherit;
}

.credits-title {
 font-family: 'Firme', sans-serif;
  font-weight: 900;
  font-size: clamp(14px, 4cqw, 28px);
  text-transform: uppercase;
  letter-spacing: 5px;
  color: #cc2200;
  text-shadow: none;
  letter-spacing: 1px;
  padding-bottom: clamp(4px, 1.5cqw, 14px);
}

.credits-section {
  display: flex;
  flex-direction: column;
  gap: clamp(2px, 0.6cqw, 6px);
}

.credits-label {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: clamp(8px, 3.6cqw, 14px);
  text-transform: none;
  letter-spacing: 1px;
  color: rgba(30, 10, 0, 0.55);
  text-shadow: none;
}

.credits-names {
  font-family: 'Firme', sans-serif;
  font-weight: 900;
  font-size: clamp(9px, 3.2cqw, 16px);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(30, 10, 0, 0.9);
  line-height: 1.35;
  text-shadow: none;
}

/* ── In-page mobile nav (rendered inside each page on mobile) ── */
.page-nav {
  display: none;
  flex-shrink: 0;
  height: 60px;
  justify-content: space-between;
  align-items: center;
  padding: 0 12px;
}

.page-nav-btn {
  background: rgba(245, 200, 66, 0.2);
  border: 1.5px solid #f5c842;
  color: #f5c842;
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  font-variant-emoji: text;
}

.page-nav-btn:active  { background: rgba(245, 200, 66, 0.4); }
.page-nav-btn:disabled { opacity: 0.3; cursor: default; }

.page-nav-num {
  font-family: 'Firme', sans-serif;
  font-weight: 500;
  font-size: 11px;
  color: #f5c842;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin: 0 12px;
}

/* ══════════════════════════════════════════════════════
   Compact desktop — narrower screens up to 1399px
   ══════════════════════════════════════════════════════ */
@media (max-width: 1399px) and (min-width: 501px) {
  .nav-buttons { margin-top: 14px; }

  .nav-btn {
    font-size: 10px;
    letter-spacing: 1px;
    padding: 5px 12px;
  }

  .nav-edge-left  { padding-right: 10px; }
  .nav-edge-right { padding-left:  10px; }
  .nav-center     { gap: 10px; }
}

/* ══════════════════════════════════════════════════════
   Mobile — full-screen book, nav lives inside each page
   ══════════════════════════════════════════════════════ */
@media (max-width: 500px) {
  /* Prevent body/html from scrolling — everything must fit in the viewport */
  html, body { overflow: hidden; height: 100%; }

  /* Kill all external chrome */
  .book-title,
  .page-indicator,
  .nav-buttons,
  .book-shadow,
  .corner-logo {
    display: none;
  }

  /* Both wrapper and outer use dvh so they match window.innerHeight exactly */
  .book-wrapper {
    height: 100dvh;
    padding: 0;
    justify-content: flex-start;
    overflow: hidden;
  }

  .book-outer {
    width: 100vw;
    height: 100dvh;
    overflow: hidden;
  }

  /* Hide the in-page header and the old overlay nav */
  .page-header  { display: none; }
  .mobile-nav   { display: none; }

  /* Show logo title bar overlay and in-page nav */
  .mobile-title-bar { display: grid; }
  .page-nav         { display: flex; }

  .mobile-share-menu.open { display: flex; }

  /* Top padding clears the title-bar overlay (66px); no bottom overlay needed */
  .page-content {
    padding: 68px 10px 8px;
    gap: 6px;
    overflow: hidden;
    background-size: 100vw auto;
    background-size: 100vw 100vh;
    background-repeat: repeat-y;
  }

  /* Single sticker per page.
     --book-h = window.innerHeight (set from JS).
     Grid height = book_h minus: top-pad(68) + gap(6) + page-nav(60) + bot-pad(8) = 142px.
     Sticker is height-driven: height fills the grid cell, aspect-ratio derives the width.
     max-width: 100% prevents it being wider than the page on very tall devices. */
  .sticker-grid {
    grid-template-columns: 1fr !important;
    grid-template-rows: 1fr !important;
    height: calc(var(--book-h) - 142px);
  }

  .sticker-frame {
    width: auto;
    height: 90%;
    max-width: 100%;
    max-height: none;
  }

  /* White buttons and labels on mobile */
  .page-nav-btn {
    color: #ffffff;
    border-color: #acd337         ;
    background: rgba(255, 255, 255, 0.15);
  }
  .page-nav-btn:active { background: rgba(255, 255, 255, 0.3); }
  .page-nav-num { color: #ffffff; }

  /* Last page: keep page-nav pinned to the bottom, same as every other page */
  .last-page {
    align-items: stretch;
    justify-content: flex-start;
  }

  .last-page .credits-frame {
    flex: 1;
    min-height: 0;
    align-self: center;
  }

  .last-page .credits-wrap {
    flex: 1;
    min-height: 0;
  }

  /* Spine hidden — no spine in single-page mode */
  .spine { display: none; }

  /* Larger text on the full-screen sticker card */
  .sticker-flag   { font-size: 36px; }
  .sticker-name   { font-size: 16px; }
  .sticker-pos    { font-size: 10px; }
  .sticker-number { display: none; }

  .intro-text-wrap {
    width: 80%;
  }
}