:root {
  --bg: #181838;
  --bg2: #26265a;
  --panel: #303266;
  --line: #4a4c8a;
  --text: #ffffff;
  --sub: #bec4e6;
  --yellow: #ffd640;
  --green: #58d68d;
  --pink: #ff78aa;
  --blue: #5aaaff;
  --orange: #ffa046;
  --purple: #aa82ff;
  --red: #ff6363;
  --ink: #141428;
  --emoji: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", "Twemoji Mozilla", sans-serif;
  --radius: 18px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; }
body {
  background-color: var(--bg);
  background-image: radial-gradient(circle at 20% 10%, #2c2c66 0, transparent 40%),
                    radial-gradient(circle at 85% 90%, #2e2268 0, transparent 45%);
  background-attachment: fixed;
  color: var(--text);
  font-family: "Nunito", "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-weight: 700;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; touch-action: manipulation; }
button:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }

#app {
  max-width: 1040px;
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(10px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right))
           max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.emoji { font-family: var(--emoji); font-weight: 400; line-height: 1; }

/* ---------- header ---------- */
.bar { display: flex; align-items: center; gap: 10px; min-height: 52px; }
.bar h1 { flex: 1; margin: 0; font-size: clamp(20px, 4.5vw, 30px); text-align: center; line-height: 1.1; }
.bar h1 small { display: block; font-size: 13px; color: var(--sub); font-weight: 600; margin-top: 2px; }
.icon-btn {
  width: 52px; height: 48px; border-radius: 14px; background: var(--panel);
  display: grid; place-items: center; font-size: 26px; flex: none;
}
.stars { display: flex; align-items: center; gap: 4px; color: var(--yellow); font-size: 22px; min-width: 64px; justify-content: flex-end; }
.stars .emoji { font-size: 24px; }

/* ---------- big colourful buttons ---------- */
.big {
  border-radius: var(--radius);
  color: var(--ink);
  box-shadow: 0 5px 0 rgba(0, 0, 0, .35);
  transition: transform .08s ease;
}
.big:active { transform: translateY(3px); box-shadow: 0 2px 0 rgba(0, 0, 0, .35); }
/* button.c-* outranks .pill, so coloured pill buttons keep their colour */
button.c-yellow, .c-yellow { background: var(--yellow); } button.c-orange, .c-orange { background: var(--orange); }
button.c-pink, .c-pink { background: var(--pink); } button.c-purple, .c-purple { background: var(--purple); }
button.c-blue, .c-blue { background: var(--blue); } button.c-green, .c-green { background: var(--green); }
button.c-red, .c-red { background: var(--red); }
button.big { color: var(--ink); }

/* ---------- menu ---------- */
.games { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; flex: 1; align-content: center; }
.game-btn { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  padding: 18px 8px; min-height: 180px; font-size: clamp(17px, 3vw, 22px); }
.game-btn .emoji { font-size: clamp(56px, 11vw, 92px); }
@media (max-width: 640px) { .games { grid-template-columns: repeat(2, 1fr); } .game-btn { min-height: 150px; } }
.menu-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.pill { background: var(--panel); border-radius: 999px; padding: 10px 18px; font-size: 16px; display: inline-flex; align-items: center; gap: 8px; }
.note { color: var(--sub); font-size: 13px; font-weight: 600; }

/* ---------- levels ---------- */
.levels { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; flex: 1; align-content: center; }
.level-btn { min-height: 120px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 12px; font-size: 19px; }
.level-btn .emoji { font-size: 26px; letter-spacing: 2px; }
.sources { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.source { border: 2px solid var(--line); background: var(--panel); color: var(--sub); }
.source.on { background: #fff; color: var(--ink); border-color: var(--yellow); }

/* ---------- puzzle boards ---------- */
.play { flex: 1; display: flex; gap: 16px; align-items: center; justify-content: center; }
.board-wrap { width: min(86vh, 64vw); max-width: 640px; aspect-ratio: 1; }
.side { width: 220px; display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; }
.side img { width: 150px; height: 150px; border-radius: 12px; box-shadow: 0 4px 12px rgba(0,0,0,.4); }
.side .title { font-size: 22px; }
.side .meta { color: var(--sub); font-size: 15px; }
@media (orientation: portrait), (max-width: 700px) {
  .play { flex-direction: column; }
  .board-wrap { width: min(94vw, 64vh); }
  .side { width: 100%; flex-direction: row; justify-content: center; flex-wrap: wrap; }
  .side img { width: 72px; height: 72px; }
}
.board { width: 100%; height: 100%; display: grid; gap: 3px; background: #0e0e26; border-radius: 12px; overflow: hidden; padding: 3px; }
.tile { position: relative; background-repeat: no-repeat; border-radius: 4px; }
.tile.sel { outline: 5px solid var(--yellow); outline-offset: -5px; z-index: 1; }
.tile.blank { background: #0e0e26 !important; }
.badge { position: absolute; left: 5px; top: 5px; min-width: 24px; height: 24px; padding: 0 6px; border-radius: 12px;
  background: rgba(20, 20, 40, .85); color: #fff; font-size: 14px; display: grid; place-items: center; }
.board.done { gap: 0; padding: 0; }

/* ---------- memory ---------- */
.cards { flex: 1; display: grid; gap: 10px; }
.card { border-radius: 14px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--purple); box-shadow: 0 4px 0 #46288c; overflow: hidden; min-height: 54px; position: relative; }
.card .q { font-size: clamp(26px, 6vw, 46px); color: #fff; }
.card.up { background: #fff; box-shadow: 0 4px 0 #9a9ac0; }
.card.done { background: #c8f5d2; box-shadow: 0 4px 0 #6cbf84; }
.card .face { font-size: clamp(30px, 7vw, 64px); }
.card .photo { position: absolute; inset: 5px 5px 5px 5px; background-size: cover; background-position: center; border-radius: 10px; }
.card.done.labelled .photo { bottom: 24px; }
.card .label { position: absolute; bottom: 4px; left: 4px; right: 4px; font-size: 13px; color: #1e5a32;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: center; }

/* ---------- math ---------- */
.math { flex: 1; display: flex; flex-direction: column; gap: 14px; }
.stage { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; min-height: 200px; }
.story { font-size: clamp(18px, 3.5vw, 24px); color: var(--text); font-weight: 600; text-align: center; }
.rows { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.row { display: flex; gap: 6px; align-items: center; }
.row .five { width: 16px; }
.pic { font-size: var(--pic, 40px); position: relative; }
.pic.gone::after { content: ""; position: absolute; inset: 8%;
  background: linear-gradient(45deg, transparent 44%, var(--red) 44%, var(--red) 56%, transparent 56%),
              linear-gradient(-45deg, transparent 44%, var(--red) 44%, var(--red) 56%, transparent 56%); }
.plus { font-size: 34px; color: var(--sub); padding: 0 8px; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; width: 100%; }
.compare > div { background: #24265a; border-radius: 16px; padding: 16px 8px; min-height: 150px; display: grid; place-items: center; }
.eq { font-size: clamp(44px, 10vw, 80px); letter-spacing: 2px; }
.eq .ask, .cell.ask { color: var(--yellow); }
.cells { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.cell { width: clamp(62px, 13vw, 96px); height: clamp(62px, 13vw, 90px); border-radius: 14px; background: var(--panel);
  display: grid; place-items: center; font-size: clamp(28px, 6vw, 44px); }
.cell.ask { background: #463c14; outline: 3px solid var(--yellow); }
.numline { width: min(520px, 90%); height: 14px; border-bottom: 3px solid var(--line);
  background: repeating-linear-gradient(90deg, var(--line) 0 3px, transparent 3px 12.5%); background-size: 100% 12px; background-repeat: no-repeat; background-position: bottom; }
.blocks { display: flex; align-items: flex-end; gap: 8px; }
.rod { display: grid; grid-template-rows: repeat(10, 1fr); gap: 1px; width: clamp(14px, 2.6vw, 20px); height: clamp(140px, 30vh, 210px); }
.rod i, .ones i { display: block; background: var(--blue); border: 1px solid #1e3c78; border-radius: 2px; }
.ones { display: flex; gap: 4px; margin-left: 22px; }
.ones i { width: clamp(14px, 2.6vw, 20px); height: clamp(14px, 3vh, 21px); background: var(--orange); border-color: #784614; }
.frame { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.frame span { width: 46px; height: 46px; border: 2px solid var(--line); border-radius: 8px; display: grid; place-items: center; font-size: 30px; }
.hint { color: var(--sub); font-size: 14px; font-weight: 600; }
.answers { display: grid; gap: 12px; }
.answer { min-height: 76px; font-size: clamp(28px, 6vw, 42px); }
.answer.small { font-size: clamp(17px, 3.6vw, 22px); }
.answer.wrong { background: #3c3c5a; color: #8282a0; box-shadow: none; outline: 3px solid var(--red); outline-offset: -3px; }
.answer.right { background: var(--green); outline: 4px solid #fff; outline-offset: -4px; }

/* ---------- win overlay ---------- */
.overlay { position: fixed; inset: 0; background: rgba(8, 8, 24, .55); display: grid; place-items: center; padding: 16px; z-index: 10;
  animation: fade .25s ease; }
.win { width: min(460px, 100%); background: #2c2e64; border: 3px solid var(--yellow); border-radius: 22px; padding: 22px 20px;
  text-align: center; box-shadow: 0 10px 0 rgba(0,0,0,.4); animation: pop .35s cubic-bezier(.2, 1.4, .5, 1); }
.win h2 { margin: 0; font-size: 34px; }
.win .emoji { font-size: 38px; display: block; margin: 8px 0; letter-spacing: 4px; }
.win .what { color: var(--yellow); font-size: 21px; }
.win p { color: var(--text); font-weight: 600; font-size: 16px; margin: 8px 0 18px; }
.win .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.win .actions button { min-height: 56px; font-size: 19px; }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { transform: scale(.7); opacity: 0; } }

/* ---------- photos ---------- */
.photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
.photo-item { background: var(--panel); border-radius: 14px; padding: 8px; display: flex; flex-direction: column; gap: 6px; }
.photo-item img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; }
.photo-item .cap { font-size: 13px; color: var(--sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.photo-item .acts { display: flex; gap: 6px; }
.photo-item .acts button { flex: 1; background: #3c3e78; border-radius: 10px; padding: 6px; font-size: 13px; }
.add-photos { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.add-photos label { padding: 14px 20px; font-size: 18px; display: inline-flex; gap: 8px; align-items: center; cursor: pointer; }
.add-photos input { display: none; }
.empty { color: var(--sub); text-align: center; padding: 30px 10px; font-weight: 600; }
.sleepy { position: fixed; inset: 0; background: #000; z-index: 20; display: grid; place-items: end center; padding-bottom: 30px; color: #333350; }