:root {
  color-scheme: light;
  --ink: #34275a;
  --purple: #7857e8;
  --purple-dark: #5636c7;
  --cream: #fffaf0;
  --shadow: 0 9px 0 rgba(54, 36, 112, 0.16), 0 18px 34px rgba(63, 47, 122, 0.18);
  font-family: ui-rounded, "Arial Rounded MT Bold", "Trebuchet MS", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: #8a6bea;
}

button {
  border: 0;
  font: inherit;
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
}

button:focus-visible {
  outline: 5px solid #fff;
  outline-offset: 4px;
}

button:active:not(:disabled) {
  transform: translateY(4px) scale(0.97);
  box-shadow: 0 3px 0 rgba(54, 36, 112, 0.18), 0 7px 14px rgba(63, 47, 122, 0.17);
}

button:disabled {
  filter: grayscale(0.8);
  opacity: 0.45;
  cursor: default;
}

.app-shell,
.screen {
  width: 100%;
  height: 100dvh;
  min-height: 100%;
}

.screen[hidden] {
  display: none;
}

.gallery-screen {
  position: relative;
  overflow: hidden auto;
  padding: max(20px, env(safe-area-inset-top)) clamp(16px, 4vw, 42px) max(32px, env(safe-area-inset-bottom));
  background-color: #7355d8;
  background-image:
    radial-gradient(circle at 12% 16%, rgba(255,255,255,.55) 0 3px, transparent 4px),
    radial-gradient(circle at 82% 10%, rgba(255,255,255,.7) 0 4px, transparent 5px),
    radial-gradient(circle at 70% 32%, rgba(255,255,255,.45) 0 3px, transparent 4px),
    linear-gradient(150deg, rgba(126,91,220,.34), rgba(82,56,184,.52)),
    url("./assets/backgrounds/rainbow-castle.jpg");
  background-position: center, center, center, center, center;
  background-repeat: no-repeat;
  background-size: auto, auto, auto, cover, cover;
}

.gallery-header {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 76px 1fr 76px;
  align-items: center;
  width: min(960px, 100%);
  margin: 0 auto 18px;
}

.round-button,
.tool-button {
  display: grid;
  place-items: center;
  color: #fff;
  border: 4px solid rgba(255,255,255,.86);
  box-shadow: var(--shadow);
  transition: transform .16s ease, box-shadow .16s ease, filter .16s ease;
}

.round-button {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  font-size: 31px;
}

.sound-button {
  background: linear-gradient(145deg, #43d5ce, #20b6bb);
}

.brand-mark {
  position: relative;
  width: 150px;
  height: 104px;
  justify-self: center;
}

.rainbow {
  position: absolute;
  inset: 8px 13px 27px;
  border: 14px solid #ff5f75;
  border-bottom: 0;
  border-radius: 90px 90px 0 0;
  filter: drop-shadow(0 7px 0 rgba(60,36,126,.15));
}

.rainbow i {
  position: absolute;
  border-style: solid;
  border-bottom: 0;
  border-radius: 70px 70px 0 0;
}

.rainbow i:nth-child(1) { inset: 0; border-width: 11px; border-color: #ffae42; }
.rainbow i:nth-child(2) { inset: 11px; border-width: 11px; border-color: #ffe34f; }
.rainbow i:nth-child(3) { inset: 22px; border-width: 11px; border-color: #49d890; }
.rainbow i:nth-child(4) { inset: 33px; border-width: 10px; border-color: #42b9ef; }

.paint-smile {
  position: absolute;
  left: 37px;
  bottom: 8px;
  width: 78px;
  height: 36px;
  border-radius: 10px 10px 42px 42px;
  background: #fffaf2;
  box-shadow: inset 0 -6px 0 rgba(101,67,170,.1), 0 6px 0 rgba(60,36,126,.14);
}

.paint-smile::after {
  content: "";
  position: absolute;
  left: 25px;
  bottom: 7px;
  width: 28px;
  height: 12px;
  border-bottom: 5px solid #5e40a4;
  border-radius: 50%;
}

.paint-smile span {
  position: absolute;
  top: 9px;
  width: 7px;
  height: 9px;
  border-radius: 50%;
  background: #5e40a4;
}

.paint-smile span:first-child { left: 19px; }
.paint-smile span:last-child { right: 19px; }

.brand-star {
  position: absolute;
  z-index: 2;
  color: #ffe75c;
  font-size: 30px;
  text-shadow: 0 3px 0 #e39a31;
  animation: twinkle 1.7s ease-in-out infinite alternate;
}

.brand-star--one { left: -8px; top: 16px; }
.brand-star--two { right: -7px; top: 6px; animation-delay: .5s; }

@keyframes twinkle {
  to { transform: rotate(22deg) scale(1.22); }
}

.page-gallery {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(15px, 2.4vw, 28px);
  width: min(960px, 100%);
  margin: 0 auto;
  padding-bottom: 18px;
}

.page-card {
  position: relative;
  aspect-ratio: .8;
  min-height: 150px;
  padding: 0;
  overflow: hidden;
  border: 5px solid rgba(255,255,255,.96);
  border-radius: clamp(22px, 3vw, 34px);
  background: var(--card-color, #fff);
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}

.page-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(145deg, rgba(255,255,255,.55), transparent 34%);
}

.page-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  mix-blend-mode: multiply;
}

.page-card:hover {
  transform: translateY(-5px) rotate(var(--tilt, 0deg));
}

.page-card:nth-child(3n+1) { --tilt: -1deg; }
.page-card:nth-child(3n+2) { --tilt: 1deg; }

.coloring-screen {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  background-color: #9fdfe8;
  background-image:
    linear-gradient(rgba(200,247,250,.1), rgba(108,205,218,.16)),
    var(--game-bg, linear-gradient(160deg, #b7ebf4 0%, #96dfe7 46%, #85d4df 100%));
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.top-toolbar {
  position: relative;
  z-index: 5;
  display: flex;
  justify-content: center;
  gap: clamp(8px, 2vw, 18px);
  padding: max(10px, env(safe-area-inset-top)) 12px 9px;
  min-width: 0;
}

.tool-button {
  position: relative;
  width: clamp(58px, 10vw, 76px);
  height: clamp(58px, 10vw, 76px);
  border-radius: 24px;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
}

.tool-button--home { background: linear-gradient(145deg, #ff8b61, #f06552); font-size: 49px; }
.tool-button--voice { background: linear-gradient(145deg, #ffd762, #f3af35); font-size: 30px; }
.tool-button--peek { background: linear-gradient(145deg, #56c7f0, #2f9fe0); }
.tool-button--undo { background: linear-gradient(145deg, #9d78f1, #7452dc); }
.tool-button--clear { background: linear-gradient(145deg, #ff9cca, #ef6cae); font-size: 32px; }
.tool-button--finish { background: linear-gradient(145deg, #64dc8d, #38b86a); color: #fff65f; }

/* Framed-picture pictogram (a little colored scene) for the reference button. */
.peek-glyph {
  position: relative;
  display: block;
  width: 54%;
  height: 42%;
  border: 4px solid #fff;
  border-radius: 8px;
  background: linear-gradient(180deg, #bdeeff 0 58%, #b6f0c8 58% 100%);
  overflow: hidden;
  box-shadow: inset 0 0 0 2px rgba(47,110,150,.25);
}

.peek-glyph i {
  position: absolute;
  bottom: -3px;
  border-radius: 50% 50% 0 0;
}

.peek-glyph i:nth-child(1) { left: 4%; width: 42%; height: 60%; background: #4fb96e; }
.peek-glyph i:nth-child(2) { right: 2%; width: 48%; height: 78%; background: #35a25a; }
.peek-glyph i:nth-child(3) {
  top: 10%;
  right: 12%;
  bottom: auto;
  width: 22%;
  height: 0;
  padding-top: 22%;
  border-radius: 50%;
  background: #ffe259;
}

.arm-ring {
  position: absolute;
  inset: -6px;
  border: 5px solid transparent;
  border-radius: 30px;
  pointer-events: none;
}

.tool-button--clear.is-armed {
  animation: armWiggle .5s ease-in-out infinite alternate;
}

.tool-button--clear.is-armed .arm-ring {
  border-color: #fff;
  animation: armPulse .9s ease-in-out infinite;
}

@keyframes armPulse {
  0%, 100% { opacity: .35; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}

@keyframes armWiggle {
  from { transform: rotate(-4deg); }
  to { transform: rotate(4deg); }
}

.canvas-stage {
  min-height: 0;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 4px 12px 10px;
  container-type: size;
}

.paper-frame,
.reference-frame {
  position: relative;
  flex: 0 1 auto;
  margin: 0;
  height: 100%;
  width: auto;
  aspect-ratio: 724 / 1086;
  max-width: 100%;
  overflow: hidden;
  border: 8px solid rgba(255,255,255,.95);
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 11px 0 rgba(45,120,137,.15), 0 18px 35px rgba(37,107,126,.2);
}

.paper-frame {
  display: grid;
  place-items: center;
}

.reference-frame { display: none; }

.canvas-stage.is-split .reference-frame { display: block; }

/* Size frames from the stage itself so neither direction can distort the canvas. */
@supports (height: 1cqh) {
  .paper-frame,
  .reference-frame {
    height: min(100cqh, 100cqw * 1086 / 724);
    max-width: none;
  }

  .canvas-stage.is-split .paper-frame,
  .canvas-stage.is-split .reference-frame {
    height: min(100cqh, (100cqw - 14px) / 2 * 1086 / 724);
  }
}

/* Sticker badge matching the peek button, so the child links panel and button. */
.reference-frame::after {
  content: "✦";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 20px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: linear-gradient(145deg, #56c7f0, #2f9fe0);
  box-shadow: 0 4px 10px rgba(31,98,138,.35);
}

.reference-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tool-button--peek.is-on {
  background: linear-gradient(145deg, #2f9fe0, #1e83c4);
  outline: 5px solid #ffe75c;
  outline-offset: 3px;
  transform: translateY(3px);
  box-shadow: 0 4px 0 rgba(54, 36, 112, 0.16), 0 9px 18px rgba(63, 47, 122, 0.18);
}

#paintCanvas {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  background: #fff;
  cursor: crosshair;
  touch-action: none;
}

.canvas-loader {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: rgba(255,255,255,.96);
}

.canvas-loader[hidden] { display: none; }

.canvas-loader span {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ff6c82;
  animation: bounce .65s ease-in-out infinite alternate;
}

.canvas-loader span:nth-child(2) { background: #ffd655; animation-delay: .16s; }
.canvas-loader span:nth-child(3) { background: #55d69c; animation-delay: .32s; }

@keyframes bounce { to { transform: translateY(-18px); } }

.bottom-tools {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 12px max(12px, env(safe-area-inset-bottom));
  background: rgba(255,255,255,.82);
  border-top: 4px solid rgba(255,255,255,.94);
  box-shadow: 0 -9px 24px rgba(37,107,126,.12);
  backdrop-filter: blur(12px);
  min-width: 0;
  width: 100%;
}

.brush-tools,
.color-palette {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brush-tools {
  flex: 0 0 auto;
  padding-right: 12px;
  border-right: 3px dashed rgba(72,85,130,.19);
}

.color-palette {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: min(720px, 69vw);
  padding: 5px 2px 9px;
  scrollbar-width: none;
}

.color-palette::-webkit-scrollbar { display: none; }

.color-button,
.size-button,
.eraser-button {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: #e9edf5;
  box-shadow: 0 6px 0 rgba(68,76,123,.17), 0 9px 18px rgba(72,75,116,.16);
  transition: transform .14s ease, box-shadow .14s ease;
}

.color-button {
  position: relative;
  background: var(--swatch);
}

.color-button::after {
  content: "";
  position: absolute;
  inset: 7px 9px auto;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,.38);
  transform: rotate(-16deg);
}

.color-button.is-selected,
.size-button.is-selected,
.eraser-button.is-selected {
  transform: translateY(-8px) scale(1.12);
  outline: 5px solid #7355d8;
  outline-offset: 2px;
}

.size-button { width: 48px; height: 48px; }
.size-button i { display: block; border-radius: 50%; background: #4c3e72; }
.size-button[data-size="12"] i { width: 8px; height: 8px; }
.size-button[data-size="26"] i { width: 16px; height: 16px; }
.size-button[data-size="48"] i { width: 28px; height: 28px; }

.eraser-button {
  width: 52px;
  height: 52px;
  border-radius: 17px;
}

.eraser-button span {
  width: 31px;
  height: 21px;
  border: 3px solid #ae4e7f;
  border-radius: 7px;
  background: linear-gradient(90deg, #ff98c5 0 63%, #fff 63%);
  transform: rotate(-33deg);
}

.celebration {
  position: absolute;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.confetti {
  position: absolute;
  top: -10vh;
  width: 15px;
  height: 28px;
  border-radius: 5px;
  animation: fall var(--fall-time) cubic-bezier(.14,.58,.42,.97) forwards;
  transform: rotate(var(--spin));
}

@keyframes fall {
  to { top: 110vh; transform: translateX(var(--drift)) rotate(calc(var(--spin) + 720deg)); }
}

@media (max-width: 760px) {
  .gallery-header { grid-template-columns: 66px 1fr 66px; margin-bottom: 14px; }
  .round-button { width: 62px; height: 62px; }
  .brand-mark { transform: scale(.86); }
  .page-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .top-toolbar { gap: clamp(5px, 1.6vw, 12px); }
  .tool-button { width: clamp(48px, 13.5vw, 66px); height: clamp(48px, 13.5vw, 66px); border-radius: 20px; }
  .tool-button--home { font-size: clamp(28px, 8vw, 42px); }
  .bottom-tools { flex-direction: column; gap: 8px; padding-top: 8px; overflow: hidden; }
  .brush-tools { border-right: 0; border-bottom: 3px dashed rgba(72,85,130,.19); padding: 0 0 7px; }
  .color-palette { width: 100%; max-width: 100%; justify-content: flex-start; }
  .color-button { width: 54px; height: 54px; }
  .size-button { width: 44px; height: 44px; }
  .eraser-button { width: 48px; height: 48px; }
  .canvas-stage { padding-left: 7px; padding-right: 7px; gap: 8px; }
  .paper-frame, .reference-frame { border-width: 5px; border-radius: 19px; }
  .reference-frame::after { width: 30px; height: 30px; font-size: 16px; }
}

/* Old browsers without container queries: fall back to width-bound frames on small portrait screens. */
@supports not (height: 1cqh) {
  @media (max-width: 760px) {
    .paper-frame, .reference-frame { width: 100%; height: auto; max-height: 100%; }
  }
}

/* Landscape is the home layout on tablets: tool columns on the sides, art in the middle. */
@media (orientation: landscape) {
  .coloring-screen { grid-template-columns: auto minmax(0, 1fr) auto; grid-template-rows: 1fr; }
  .top-toolbar {
    flex-direction: column;
    justify-content: center;
    gap: clamp(8px, 1.8vh, 16px);
    padding: 10px 10px 10px max(10px, env(safe-area-inset-left));
    overflow: hidden auto;
  }
  .canvas-stage { padding: 8px 6px; }
  .bottom-tools {
    flex-direction: column;
    justify-content: center;
    flex: 0 0 156px;
    width: 156px;
    max-height: none;
    min-height: 0;
    padding: 10px max(10px, env(safe-area-inset-right)) 10px 10px;
    border-top: 0;
    border-left: 4px solid rgba(255,255,255,.94);
    box-shadow: -9px 0 24px rgba(37,107,126,.12);
  }
  .brush-tools {
    display: grid;
    grid-template-columns: repeat(2, 58px);
    justify-items: center;
    justify-content: center;
    width: 132px;
    border-right: 0;
    border-bottom: 3px dashed rgba(72,85,130,.19);
    padding: 0 0 8px;
  }
  .color-palette {
    display: grid;
    grid-template-columns: repeat(2, 58px);
    grid-auto-rows: 58px;
    align-content: center;
    justify-content: center;
    min-height: 0;
    max-width: none;
    max-height: none;
    width: 132px;
    overflow: visible;
    padding: 8px;
  }
  .color-button.is-selected {
    transform: scale(1.08);
  }
}

@media (max-height: 680px) and (orientation: landscape) {
  .top-toolbar { padding: 9px; gap: 6px; }
  .tool-button { width: 54px; height: 54px; border-radius: 18px; font-size: 29px; }
  .tool-button--home { font-size: 39px; }
  .canvas-stage { padding: 7px 3px; }
  .bottom-tools { flex-basis: 128px; width: 128px; padding: 8px max(8px, env(safe-area-inset-right)) 8px 8px; }
  .brush-tools { grid-template-columns: repeat(2, 48px); width: 112px; padding: 0 0 7px; }
  .color-palette { grid-template-columns: repeat(2, 48px); grid-auto-rows: 48px; width: 112px; padding: 8px; }
  .color-button { width: 48px; height: 48px; }
  .size-button { width: 44px; height: 44px; }
  .eraser-button { width: 48px; height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}