:root {
  --ink: #2b2d42;
  --ink-soft: #5c5f7a;
  --paper: #ffffff;
  --cream: #fff8ec;
  --sky: #dff1ff;
  --pink: #f15bb5;
  --orange: #ff8a3d;
  --sun: #ffc53d;
  --mint: #06c48f;
  --sea: #1b98e0;
  --grape: #9b5de5;
  --coral: #ff5d73;
  --good: #06c48f;
  --bad: #ff5d73;
  --shadow: 0 10px 30px rgba(43, 45, 66, 0.12);
  --radius: 24px;
  --font: "Fredoka", "Comic Sans MS", "Trebuchet MS", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: linear-gradient(160deg, var(--cream) 0%, var(--sky) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

button { font-family: inherit; color: inherit; }

:focus-visible { outline: 4px solid var(--sea); outline-offset: 3px; }

/* Floating background blobs */
.sky { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.blob {
  position: absolute; border-radius: 50%; filter: blur(2px); opacity: 0.35;
  animation: float 14s ease-in-out infinite;
}
.b1 { width: 220px; height: 220px; background: var(--pink); top: -60px; left: -60px; }
.b2 { width: 160px; height: 160px; background: var(--sun); top: 30%; right: -50px; animation-delay: -4s; }
.b3 { width: 260px; height: 260px; background: var(--mint); bottom: -90px; left: 20%; animation-delay: -8s; }
.b4 { width: 120px; height: 120px; background: var(--grape); top: 55%; left: -30px; animation-delay: -2s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -25px) scale(1.08); }
}

#confetti { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 50; }

.app {
  position: relative; z-index: 1;
  max-width: 780px; margin: 0 auto; padding: 12px 16px 32px;
}

/* Top bar */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.brand {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 0; cursor: pointer;
  font-size: 1.5rem; font-weight: 700; color: var(--grape); padding: 6px 8px; border-radius: 14px;
}
.brand .logo { font-size: 1.6rem; }
.icon-btn {
  width: 48px; height: 48px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--paper); box-shadow: var(--shadow); font-size: 1.4rem;
}

/* Screens */
.screen { display: none; animation: pop-in 0.35s ease; }
.screen.active { display: block; }
@keyframes pop-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* Start screen */
.hero { text-align: center; margin: 8px 0 20px; }
.hero h1 { font-size: clamp(1.7rem, 5vw, 2.5rem); margin: 6px 0; line-height: 1.15; }
.hero p { font-size: 1.15rem; color: var(--ink-soft); margin: 0; }

.mascot { font-size: 2.6rem; line-height: 1; display: inline-block; }
.mascot.big { font-size: 4.5rem; }
.bob { animation: bob 2.4s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(-3deg); } 50% { transform: translateY(-8px) rotate(3deg); } }

.age-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.age-card {
  --c: var(--sea);
  position: relative; cursor: pointer; border: 0; border-radius: var(--radius);
  background: var(--paper); padding: 16px 10px 14px; text-align: center;
  box-shadow: 0 6px 0 var(--c), var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.age-card:hover { transform: translateY(-4px) rotate(-1deg); }
.age-card:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--c), var(--shadow); }
.age-card .emoji { font-size: 2.6rem; display: block; }
.age-card .age {
  display: inline-block; margin: 6px 0 2px; padding: 2px 14px; border-radius: 999px;
  background: var(--c); color: #fff; font-weight: 700; font-size: 1.25rem;
}
.age-card .name { display: block; font-weight: 600; font-size: 1.05rem; }
.age-card .best { display: block; font-size: 0.9rem; color: var(--ink-soft); margin-top: 4px; }

.how {
  list-style: none; padding: 16px 18px; margin: 22px 0 0;
  background: rgba(255, 255, 255, 0.7); border-radius: var(--radius);
  display: grid; gap: 8px; font-size: 1.05rem;
}
.how span { display: inline-block; width: 1.8em; }

/* HUD */
.hud { display: flex; align-items: center; gap: 10px; }
.lives { font-size: 1.7rem; letter-spacing: 2px; flex: 1; }
.lives .heart { display: inline-block; transition: transform 0.3s; }
.lives .heart.lost { filter: grayscale(1); opacity: 0.35; transform: scale(0.85); }
.lives .heart.pop { animation: heart-pop 0.5s ease; }
@keyframes heart-pop { 50% { transform: scale(1.5); } }
.pill {
  background: var(--paper); border-radius: 999px; padding: 8px 16px; font-size: 1.15rem;
  box-shadow: var(--shadow); white-space: nowrap;
}
.level-pill b { color: var(--grape); }
.score-pill b { color: var(--orange); }
.score-pill.bump { animation: bump 0.4s ease; }
@keyframes bump { 50% { transform: scale(1.18); } }

.progress { height: 14px; border-radius: 999px; background: rgba(255, 255, 255, 0.8); margin: 12px 0; overflow: hidden; }
.progress-fill {
  height: 100%; width: 0; border-radius: inherit;
  background: linear-gradient(90deg, var(--sun), var(--orange), var(--pink));
  transition: width 0.45s ease;
}

/* Play card */
.card {
  background: var(--paper); border-radius: 32px; box-shadow: var(--shadow);
  padding: 20px 20px 24px;
}
.speech { display: flex; align-items: center; gap: 12px; }
.bubble {
  position: relative; margin: 0; padding: 10px 16px; border-radius: 18px;
  background: var(--cream); font-size: 1.1rem; font-weight: 500; min-height: 1.5em;
}
.bubble::before {
  content: ""; position: absolute; left: -8px; top: 50%; transform: translateY(-50%);
  border: 8px solid transparent; border-right-color: var(--cream); border-left: 0;
}
.bubble.good { background: #d9fbef; color: #047857; }
.bubble.good::before { border-right-color: #d9fbef; }
.bubble.bad { background: #ffe3e7; color: #b4233a; }
.bubble.bad::before { border-right-color: #ffe3e7; }
.mascot.cheer { animation: cheer 0.6s ease; }
@keyframes cheer { 30% { transform: translateY(-14px) rotate(-10deg); } 60% { transform: translateY(0) rotate(10deg); } }

.instruction { text-align: center; font-size: clamp(1.35rem, 4vw, 1.8rem); margin: 18px 0 6px; }
.instruction em { font-style: normal; color: var(--pink); text-transform: uppercase; }

.visual { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px; font-size: 2.2rem; margin: 6px 0; min-height: 0; }
.visual:empty { display: none; }
.visual .group { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; max-width: 260px; }
.visual .op { font-size: 2rem; font-weight: 700; color: var(--grape); margin: 0 6px; }
.visual .gone { opacity: 0.25; position: relative; }
.visual .gone::after { content: "✕"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--bad); font-size: 1.6rem; opacity: 1; }
.visual .item { animation: drop 0.35s ease backwards; }
@keyframes drop { from { opacity: 0; transform: translateY(-14px) scale(0.6); } }

.question {
  text-align: center; font-weight: 700; font-size: clamp(2.4rem, 9vw, 3.6rem);
  margin: 4px 0 16px; letter-spacing: 1px;
}
.question:empty { display: none; }
.question .box {
  display: inline-block; min-width: 1.2em; padding: 0 0.15em; border-radius: 14px;
  border: 4px dashed var(--sea); color: var(--sea); line-height: 1.1;
}

.options { display: grid; grid-template-columns: repeat(var(--cols, 2), 1fr); gap: 14px; margin-top: 10px; }
.option {
  --c: var(--sea);
  position: relative; cursor: pointer; border: 0; border-radius: 22px;
  background: var(--c); color: #fff; padding: 18px 8px; min-height: 96px;
  font-size: clamp(1.9rem, 7vw, 2.6rem); font-weight: 700;
  box-shadow: 0 7px 0 rgba(0, 0, 0, 0.18);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.2s;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
}
.option:hover:not(:disabled) { transform: translateY(-3px) scale(1.03); }
.option:active:not(:disabled) { transform: translateY(5px); box-shadow: 0 2px 0 rgba(0, 0, 0, 0.18); }
.option:disabled { cursor: default; }
.option .key {
  position: absolute; top: 8px; left: 10px; font-size: 0.85rem; font-weight: 600;
  background: rgba(255, 255, 255, 0.3); border-radius: 8px; padding: 0 6px;
}
.option .caption { font-size: 1rem; font-weight: 500; opacity: 0.95; }
.option .dots { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; max-width: 110px; }
.option .dots i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.9); }
.option.correct { background: var(--good); animation: correct 0.5s ease; filter: none; }
.option.wrong { background: var(--bad); animation: shake 0.45s ease; }
.option.reveal { background: var(--good); outline: 5px solid #fff; box-shadow: 0 0 0 9px var(--good); }
.options.done .option:not(.correct):not(.wrong):not(.reveal) { filter: grayscale(0.6) opacity(0.5); }
@keyframes correct { 40% { transform: scale(1.12) rotate(-2deg); } }
@keyframes shake {
  20%, 60% { transform: translateX(-9px); }
  40%, 80% { transform: translateX(9px); }
}

.streak { text-align: center; font-size: 1.15rem; font-weight: 600; color: var(--orange); min-height: 1.6em; margin-top: 14px; }
.hint-keys { text-align: center; color: var(--ink-soft); font-size: 0.95rem; margin-top: 14px; }

/* Subject tabs */
.subject-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 18px; }
.subject-tab {
  --c: var(--sea);
  cursor: pointer; border: 3px solid transparent; border-radius: 999px; padding: 10px 12px;
  background: var(--paper); font-size: 1.15rem; font-weight: 600; box-shadow: var(--shadow);
  display: flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap;
  transition: transform 0.12s ease; flex: 0 1 auto; min-width: 128px;
}
.subject-tab:hover { transform: translateY(-2px); }
.subject-tab[aria-pressed="true"] { background: var(--c); color: #fff; box-shadow: 0 5px 0 rgba(0, 0, 0, 0.15); }
.subject-emoji { font-size: 1.4rem; }

/* Pictures, letters and words in questions */
.pic-card { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.big-pic { font-size: clamp(4rem, 14vw, 5.5rem); line-height: 1.1; animation: drop 0.35s ease; }
.word-hint { font-size: 1.6rem; font-weight: 600; letter-spacing: 3px; }
.word-hint .box { font-size: 1.4rem; padding: 0 0.2em; border-width: 3px; }
.big-letter { font-size: clamp(4rem, 15vw, 6rem); line-height: 1; color: var(--grape); }
.word-big { letter-spacing: 3px; }
.seq { letter-spacing: 0.25em; }

.say-row { display: flex; justify-content: center; }
.say-btn {
  cursor: pointer; border: 0; border-radius: 999px; padding: 8px 18px; margin: 4px 0 6px;
  background: var(--sky); color: var(--sea); font-size: 1.05rem; font-weight: 600;
  box-shadow: 0 3px 0 rgba(27, 152, 224, 0.25);
}
.say-btn:hover { background: #cde9ff; }
.say-btn[hidden] { display: none; }

.option.word .label { font-size: clamp(1.3rem, 5vw, 1.9rem); overflow-wrap: anywhere; }
.option.emoji .label { font-size: clamp(2.6rem, 10vw, 3.4rem); line-height: 1.1; }
.option.emoji .caption { font-size: 1.1rem; font-weight: 600; }

/* Shapes & space */
.shape-svg { display: block; width: 100%; height: 100%; overflow: visible; }
.shape-big { width: clamp(120px, 34vw, 160px); height: clamp(120px, 34vw, 160px); margin: 4px auto; }
.blocks { width: clamp(150px, 46vw, 220px); height: clamp(130px, 38vw, 180px); margin: 4px auto; }
.mirror-row { display: flex; align-items: center; justify-content: center; gap: 14px; }
.shape-mid { width: 110px; height: 110px; display: grid; place-items: center; }
.shape-mid.ghost { border: 4px dashed var(--sea); border-radius: 18px; color: var(--sea); font-size: 2.6rem; font-weight: 700; width: 96px; height: 96px; }
.mirror-line { width: 0; height: 120px; border-left: 4px dashed var(--grape); }
.mini-shape { display: inline-block; width: 1.05em; height: 1.05em; vertical-align: middle; margin: 0 0.06em; }
.shapes-seq .box { vertical-align: middle; }
.emoji-seq { letter-spacing: 0.08em; font-size: clamp(2rem, 8vw, 3rem); }
.grid-board {
  display: grid; grid-template-columns: repeat(var(--n), 1fr); gap: 6px; margin: 6px auto;
  width: min(100%, calc(var(--n) * 70px)); background: var(--sky); padding: 8px; border-radius: 18px;
}
.grid-board span {
  aspect-ratio: 1; display: grid; place-items: center; background: var(--paper); border-radius: 12px;
  font-size: clamp(1.6rem, 7vw, 2.3rem);
}
.row-board { display: flex; justify-content: center; gap: 10px; font-size: clamp(2.2rem, 9vw, 3rem); margin: 6px 0; }
.row-board span { background: var(--sky); border-radius: 16px; padding: 4px 8px; }
.shadow { filter: brightness(0) opacity(0.78); display: inline-block; }
.option.shape .label { width: clamp(64px, 18vw, 86px); height: clamp(64px, 18vw, 86px); }
.option.shape, .option.clock { background: var(--paper); border: 5px solid var(--c); color: var(--ink); }
.option.shape.correct, .option.clock.correct, .option.shape.reveal, .option.clock.reveal { background: #d9fbef; border-color: var(--good); }
.option.shape.wrong, .option.clock.wrong { background: #ffe3e7; border-color: var(--bad); }
.option.shape .key, .option.clock .key { background: var(--c); color: #fff; }

/* Time */
.clock-svg { display: block; width: 100%; height: 100%; }
.clock-big { width: clamp(150px, 44vw, 200px); height: clamp(150px, 44vw, 200px); margin: 4px auto; }
.option.clock .label { width: clamp(78px, 22vw, 104px); height: clamp(78px, 22vw, 104px); }
.digital {
  display: inline-block; font-family: "Courier New", monospace; font-weight: 700; letter-spacing: 2px;
  background: var(--ink); color: #7cf7b4; padding: 6px 18px; border-radius: 14px;
}

/* Memory */
.memory-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; font-size: clamp(2.2rem, 9vw, 3rem); margin: 8px 0; }
.memory-row span { background: var(--sky); border-radius: 16px; padding: 4px 8px; animation: drop 0.35s ease backwards; }
.study { display: flex; flex-direction: column; align-items: center; gap: 14px; margin: 10px 0 4px; }
.study[hidden] { display: none; }
.study-bar { width: min(100%, 360px); height: 14px; border-radius: 999px; background: var(--cream); overflow: hidden; }
.study-fill { height: 100%; width: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--mint), var(--sea)); }

/* Sticker book */
.sticker-cta { display: flex; justify-content: center; margin-top: 18px; }
.sticker-btn { background: var(--paper); box-shadow: 0 5px 0 rgba(0, 0, 0, 0.12), var(--shadow); }
.sticker-btn .count { background: var(--sun); border-radius: 999px; padding: 2px 10px; margin-left: 4px; font-size: 1rem; }
.btn.small { padding: 10px 20px; font-size: 1.05rem; }
.over-stickers { margin: 8px 0 0; }
.over-stickers p { margin: 0 0 8px; font-size: 1.15rem; font-weight: 600; }
.over-stickers .list { font-size: 2rem; vertical-align: middle; }
.stickers-card h2 { text-align: center; margin: 4px 0; font-size: 1.9rem; }
.sticker-summary { text-align: center; color: var(--ink-soft); margin: 0 0 12px; font-size: 1.1rem; }
.sticker-page h3 { margin: 16px 0 8px; font-size: 1.25rem; display: flex; justify-content: space-between; }
.sticker-page h3 span { color: var(--ink-soft); font-weight: 500; font-size: 1rem; }
.sticker-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 10px; }
.sticker {
  aspect-ratio: 1; display: grid; place-items: center; font-size: 2.3rem; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--cream)); box-shadow: 0 3px 0 rgba(0, 0, 0, 0.1);
  animation: drop 0.35s ease backwards;
}
.sticker.locked { background: #eef0f5; color: #b3b8c9; font-size: 1.5rem; font-weight: 700; box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08); }

/* Game over */
.over { text-align: center; padding-top: 28px; }
.over h2 { font-size: 2.2rem; margin: 8px 0; }
.over-sub { margin: 0 0 4px; font-size: 1.1rem; color: var(--ink-soft); font-weight: 500; }
.stars { font-size: 2.8rem; letter-spacing: 6px; margin: 6px 0 14px; }
.stars .off { filter: grayscale(1); opacity: 0.3; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 0 0 12px; }
.stats div { background: var(--cream); border-radius: 18px; padding: 12px 6px; }
.stats dt { font-size: 0.95rem; color: var(--ink-soft); }
.stats dd { margin: 2px 0 0; font-size: 1.8rem; font-weight: 700; color: var(--grape); }
.new-best { font-size: 1.3rem; font-weight: 700; color: var(--orange); margin: 6px 0; }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 16px; }
.btn {
  cursor: pointer; border: 0; border-radius: 999px; padding: 14px 28px; font-size: 1.2rem; font-weight: 600;
  background: var(--cream); box-shadow: 0 5px 0 rgba(0, 0, 0, 0.12);
  transition: transform 0.12s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(3px); }
.btn.primary { background: var(--pink); color: #fff; }

/* Level-up banner */
.banner {
  position: fixed; inset: 0; z-index: 40; display: grid; place-items: center;
  background: rgba(43, 45, 66, 0.35); padding: 16px;
}
.banner[hidden] { display: none; }
.banner-inner {
  background: var(--paper); border-radius: 32px; padding: 28px 40px; text-align: center;
  box-shadow: var(--shadow); animation: banner-in 0.5s cubic-bezier(.2, 1.6, .4, 1);
}
.banner-emoji { font-size: 4rem; }
.banner-title { font-size: 2.4rem; font-weight: 700; color: var(--grape); }
.banner-sub { font-size: 1.2rem; color: var(--ink-soft); }
@keyframes banner-in { from { transform: scale(0.3) rotate(-8deg); opacity: 0; } }

/* Phone layout */
@media (max-width: 560px) {
  .age-grid { grid-template-columns: repeat(2, 1fr); }
  .subject-tab { min-width: 0; flex: 1 1 calc(25% - 10px); flex-direction: column; gap: 0; padding: 8px 4px; font-size: 0.85rem; border-radius: 18px; }
  .subject-tabs { gap: 8px; }
  .options { --cols: 2 !important; gap: 10px; }
  .option { min-height: 84px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .card { padding: 16px 14px 20px; border-radius: 26px; }
  .brand { font-size: 1.25rem; }
  .lives { font-size: 1.4rem; }
  .pill { padding: 6px 12px; font-size: 1rem; }
  .hint-keys { display: none; }
  .visual { font-size: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  /* The memory countdown stays: it tells the child how long is left. */
  *:not(.study-fill), *::before, *::after { animation: none !important; transition: none !important; }
}