/*
 * theme.css — Little Math Stars.
 *
 * Direction: a bright, chunky picture-book game for six-year-olds, in the
 * spirit of Khan Academy Kids — a pale sky ground, one grape-purple action
 * colour, a gold star as the reward, and six toy colours (the chart tokens)
 * for the things a child counts. Dark mode is a night sky with a lavender
 * accent, not the day palette inverted.
 *
 * Own tokens (--x-*): --x-star / --x-star-edge (the reward star), --x-shine
 * (the highlight on a toy), --x-stem (an apple's stem, a balloon's string),
 * --x-eye (a fish's eye).
 */

:root {
  --canvas: #F2F6FF;
  --surface: #FFFFFF;
  --surface-2: #E5EDFC;
  --border: #D3DDF0;
  --border-strong: #A9B8D6;
  --ink: #1E2347;
  --muted: #555E80;
  --accent: #6A3DE8;
  --accent-hover: #5A2ED6;
  --accent-ink: #FFFFFF;
  --accent-text: #5A2ED6;
  --accent-strong: #4521A8;
  --accent-soft: #ECE5FF;
  --accent-border: #C9B8FA;
  --success: #16834A;
  --success-ink: #FFFFFF;
  --success-soft: #DCF5E6;
  --success-strong: #11663A;
  --warning: #B95A08;
  --warning-ink: #FFFFFF;
  --warning-soft: #FFEEDB;
  --warning-strong: #8A4306;
  --danger: #CC3434;
  --danger-ink: #FFFFFF;
  --danger-soft: #FDE3E3;
  --danger-strong: #A12020;
  --chart-1: #6A3DE8;
  --chart-2: #FF8A1F;
  --chart-3: #E8453C;
  --chart-4: #2FAE5B;
  --chart-5: #2F8CEB;
  --chart-6: #F0569B;

  --x-star: #FFC531;
  --x-star-edge: #E59B00;
  --x-shine: #FFFFFF;
  --x-stem: #7A4A21;
  --x-eye: #1E2347;

  --font-display: "Baloo 2", "Nunito", ui-rounded, system-ui, sans-serif;
  --font-body: "Nunito", ui-rounded, system-ui, sans-serif;
  --font-sans: "Nunito", ui-rounded, system-ui, sans-serif;
  --font-mono: "JetBrains Mono Variable", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --display-weight: 800;
  --display-tracking: -0.01em;
  --eyebrow-tracking: 0.04em;

  --radius-btn: 1.25rem;
  --radius-card: 2rem;
  --radius-input: 1rem;
  --border-w: 2px;
  --border-strong-w: 2px;
  --btn-weight: 800;
  --shadow-btn: 0 4px 0 color-mix(in srgb, var(--accent) 55%, black);
  --shadow-card: 0 6px 0 var(--border);
  --shadow-raised: 0 18px 40px color-mix(in srgb, var(--ink) 18%, transparent);
  --card-pad: 1.5rem;
}

html[data-theme="dark"] {
  --canvas: #141633;
  --surface: #1E2148;
  --surface-2: #292D5C;
  --border: #353A6E;
  --border-strong: #545A95;
  --ink: #F3F4FF;
  --muted: #AEB3D8;
  --accent: #A98CFF;
  --accent-hover: #BBA4FF;
  --accent-ink: #1A1240;
  --accent-text: #B9A2FF;
  --accent-strong: #D8CCFF;
  --accent-soft: #2E2766;
  --accent-border: #5B4BB0;
  --success: #3CCB7F;
  --success-ink: #06281A;
  --success-soft: #133A28;
  --success-strong: #7FE3AA;
  --warning: #FFB45C;
  --warning-ink: #2E1A00;
  --warning-soft: #3A2A14;
  --warning-strong: #FFC985;
  --danger: #FF7A7A;
  --danger-ink: #2E0606;
  --danger-soft: #3F1A22;
  --danger-strong: #FF9E9E;
  --chart-1: #A98CFF;
  --chart-2: #FFA24D;
  --chart-3: #FF6B61;
  --chart-4: #4BD07E;
  --chart-5: #5AAEFF;
  --chart-6: #FF7AB6;

  --x-star: #FFD34D;
  --x-star-edge: #F0A800;
  --x-shine: #FFFFFF;
  --x-stem: #C99266;
  --x-eye: #141633;

  --shadow-btn: 0 4px 0 color-mix(in srgb, var(--accent) 45%, black);
  --shadow-card: 0 6px 0 color-mix(in srgb, black 35%, transparent);
  --shadow-raised: 0 18px 40px color-mix(in srgb, black 50%, transparent);
}

/*
 * app.css — Little Math Stars: the play surface. The ground, the toys, the
 * ten-frame, the chunky answer buttons, the progress stars and the one moment
 * that moves — a star flying up to the score when a child gets it right.
 * Tokens only; black appears solely as shadow depth.
 */

/* ---- Ground ------------------------------------------------------------- */
.sky-ground {
  font-family: var(--font-body);
  background-color: var(--canvas);
  background-image: radial-gradient(color-mix(in srgb, var(--accent) 12%, transparent) 1.5px, transparent 1.75px);
  background-size: 1.75rem 1.75rem;
}

.logo-badge {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.875rem;
  background: var(--accent-soft);
  border: 2px solid var(--accent-border);
}

/* ---- Toys (views/art.ts) ------------------------------------------------- */
.thing { display: block; overflow: visible; }
.reward-star { display: block; flex-shrink: 0; overflow: visible; }
.f-red { fill: var(--chart-3); }
.f-leaf { fill: var(--chart-4); }
.f-blue { fill: var(--chart-5); }
.f-pink { fill: var(--chart-6); }
.f-orange { fill: var(--chart-2); }
.f-orange-deep { fill: color-mix(in srgb, var(--chart-2) 72%, black); }
.f-purple { fill: var(--chart-1); }
.f-star { fill: var(--x-star); stroke: var(--x-star-edge); }
.f-shine { fill: var(--x-shine); opacity: 0.42; }
.s-shine { stroke: var(--x-shine); opacity: 0.55; }
.s-stem { stroke: var(--x-stem); }
.f-eye { fill: var(--x-eye); }

/* ---- Bar ----------------------------------------------------------------- */
.star-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  height: 2.5rem;
  padding: 0 0.875rem 0 0.5rem;
  border-radius: 999px;
  background: var(--surface);
  border: 2px solid var(--border);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--ink);
}
.star-pill.is-bumped { animation: lms-bump 480ms ease-out; }

.when-sound-on, .when-sound-off { display: inline-flex; }
.when-sound-off { display: none; }
html.sound-off .when-sound-on { display: none; }
html.sound-off .when-sound-off { display: inline-flex; }

/* ---- Home ------------------------------------------------------------------ */
.hero-title {
  font-size: clamp(2.75rem, 9vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: var(--display-tracking);
}
.hero-word { display: inline-block; color: var(--accent-text); }

.game-tile {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: 0 8px 0 var(--border);
  color: var(--ink);
  text-decoration: none;
  transition: transform 160ms ease-out, box-shadow 160ms ease-out;
}
.game-tile:hover { transform: translateY(-4px); box-shadow: 0 12px 0 var(--border); text-decoration: none; }
.game-tile:active { transform: translateY(4px); box-shadow: 0 4px 0 var(--border); }
.game-tile:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.tile-art {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 11rem;
  padding: 1.5rem;
}
.tile-count .tile-art { background: color-mix(in srgb, var(--chart-3) 15%, var(--surface)); }
.tile-add .tile-art { background: color-mix(in srgb, var(--chart-5) 15%, var(--surface)); }
.tile-compare .tile-art { background: color-mix(in srgb, var(--chart-4) 17%, var(--surface)); }

.tile-numeral {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--ink);
}
.tile-numeral-big { font-size: 6rem; color: var(--accent-text); }
.tile-numeral-small { font-size: 3.25rem; color: var(--muted); }
.tile-op { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--muted); }

.tile-go {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  align-self: flex-start;
  height: 2.75rem;
  padding: 0 1.25rem;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  box-shadow: var(--shadow-btn);
}
.game-tile:hover .tile-go { background: var(--accent-hover); }

.grown-ups {
  padding: 1.5rem;
  border-radius: var(--radius-card);
  background: var(--surface-2);
  border: 2px solid var(--border);
}

/* ---- Progress -------------------------------------------------------------- */
.progress-row {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 0.375rem;
  max-width: 30rem;
  margin: 0.25rem auto 1.25rem;
  padding: 0;
  list-style: none;
}
.pdot {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border-radius: 999px;
  background: var(--surface);
  border: 2px dashed var(--border-strong);
  transition: border-color 200ms ease, background-color 200ms ease;
}
.pdot-star { display: none; width: 78%; height: 78%; }
.pdot.is-current { border-style: solid; border-color: var(--accent); background: var(--accent-soft); }
.pdot.is-star { border-style: solid; border-color: var(--x-star-edge); background: var(--surface); }
.pdot.is-star .pdot-star { display: block; animation: lms-star-in 520ms ease-out; }
.pdot.is-done { border-style: solid; border-color: var(--success); background: var(--success-soft); }

/* ---- The stage and a question ------------------------------------------------ */
.stage {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
}
@media (min-width: 640px) { .stage { padding: 2rem; } }

.round { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.round.is-entering { animation: lms-enter 340ms ease-out; }

.prompt { display: flex; align-items: center; justify-content: center; gap: 0.75rem; width: 100%; }
.prompt-text {
  font-size: clamp(1.625rem, 5.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.1;
  text-align: center;
  text-wrap: balance;
}
.prompt-word { color: var(--accent-text); }

.say-btn {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border: 2px solid var(--accent-border);
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}
.say-btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.say-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.say-btn .icon { width: 1.5rem; height: 1.5rem; }
.say-btn.is-inviting { animation: lms-ring 1.6s ease-in-out 3; }
html.sound-off .say-btn, html.no-speech .say-btn { display: none; }

/* Count: a ten-frame */
.ten-frame {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
  width: 100%;
  max-width: 28rem;
  padding: 0.625rem;
  border-radius: 1.25rem;
  background: var(--surface-2);
}
.frame-cell {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border-radius: 0.875rem;
  background: var(--surface);
  border: 2px dashed var(--border);
}
.frame-cell.is-full { border-style: solid; }
.frame-thing { width: 80%; height: 80%; }

/* Add: two groups and the sum */
.add-board { display: flex; align-items: center; justify-content: center; gap: 0.75rem; width: 100%; }
.add-group {
  display: grid;
  gap: 0.25rem;
  padding: 0.625rem;
  border-radius: 1.25rem;
  background: var(--surface-2);
}
.g-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.g-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.add-thing { width: 2.5rem; height: 2.5rem; }
@media (min-width: 640px) { .add-thing { width: 3.5rem; height: 3.5rem; } }
.add-op { font-family: var(--font-display); font-weight: 800; font-size: 2.5rem; line-height: 1; color: var(--muted); }

.equation {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: clamp(2.25rem, 8vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
}
.eq-op { color: var(--muted); }
.eq-q {
  display: grid;
  place-items: center;
  min-width: 1.5em;
  height: 1.5em;
  padding: 0 0.25em;
  border-radius: 0.875rem;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border: 2px dashed var(--accent-border);
}
.eq-q.is-solved { background: var(--success-soft); color: var(--success-strong); border-style: solid; border-color: var(--success); animation: lms-pop 420ms ease-out; }

/* Bigger or smaller */
.compare-hint {
  display: grid;
  place-items: center;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

/* ---- Answer buttons ------------------------------------------------------------ */
.answers { width: 100%; max-width: 30rem; }
.answer {
  display: grid;
  place-items: center;
  min-width: 0;
  height: 5.5rem;
  border-radius: 1.5rem;
  background: var(--surface);
  border: 3px solid var(--border-strong);
  box-shadow: 0 6px 0 var(--border-strong);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3rem;
  line-height: 1;
  color: var(--ink);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform 120ms ease-out, box-shadow 120ms ease-out, background-color 150ms ease, border-color 150ms ease;
}
.answer:hover { border-color: var(--accent); box-shadow: 0 6px 0 var(--accent); }
.answer:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--border-strong); }
.answer:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.answer:disabled { cursor: default; }
.answer-big { height: 9rem; font-size: 5rem; }
@media (min-width: 640px) {
  .answer { height: 6.5rem; font-size: 3.5rem; }
  .answer-big { height: 11rem; font-size: 6.5rem; }
}
.answer.is-right {
  background: var(--success);
  color: var(--success-ink);
  border-color: var(--success);
  box-shadow: 0 6px 0 color-mix(in srgb, var(--success) 60%, black);
  animation: lms-pop 420ms ease-out;
}
.answer.is-wrong {
  background: var(--danger-soft);
  color: var(--danger-strong);
  border-color: var(--danger);
  box-shadow: 0 2px 0 var(--danger);
  transform: translateY(4px);
  animation: lms-shake 420ms ease-in-out;
}

.cheer {
  min-height: 2.5rem;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  color: var(--success-strong);
}
.cheer.is-try { color: var(--danger-strong); }
.cheer .btn { font-family: var(--font-body); }

/* ---- The reward ------------------------------------------------------------------ */
.flying-star {
  position: fixed;
  z-index: 60;
  width: 3.5rem;
  height: 3.5rem;
  pointer-events: none;
}

.celebrate { width: min(28rem, calc(100vw - 2rem)); }
.celebrate-stars { display: flex; align-items: flex-end; gap: 0.5rem; }
.celebrate-stars .reward-star { width: 3.5rem; height: 3.5rem; }
.celebrate-stars .cs-2 { width: 5rem; height: 5rem; }
.celebrate[open] .cs-1 { animation: lms-star-in 600ms ease-out 100ms both; }
.celebrate[open] .cs-2 { animation: lms-star-in 600ms ease-out 250ms both; }
.celebrate[open] .cs-3 { animation: lms-star-in 600ms ease-out 400ms both; }

/* ---- Motion ------------------------------------------------------------------------ */
@keyframes lms-enter { from { transform: translateY(0.75rem) scale(0.98); } to { transform: none; } }
@keyframes lms-pop { 0% { transform: scale(1); } 40% { transform: scale(1.12); } 100% { transform: scale(1); } }
@keyframes lms-bump { 0% { transform: scale(1); } 35% { transform: scale(1.25); } 100% { transform: scale(1); } }
@keyframes lms-star-in { 0% { transform: scale(0.3) rotate(-40deg); } 70% { transform: scale(1.15) rotate(8deg); } 100% { transform: none; } }
@keyframes lms-shake {
  0%, 100% { transform: translate(0, 4px); }
  20% { transform: translate(-0.5rem, 4px); }
  40% { transform: translate(0.5rem, 4px); }
  60% { transform: translate(-0.375rem, 4px); }
  80% { transform: translate(0.375rem, 4px); }
}
@keyframes lms-ring {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent); }
  50% { box-shadow: 0 0 0 0.625rem color-mix(in srgb, var(--accent) 0%, transparent); }
}

html.reduced-motion .round.is-entering,
html.reduced-motion .answer.is-right,
html.reduced-motion .answer.is-wrong,
html.reduced-motion .eq-q.is-solved,
html.reduced-motion .pdot-star,
html.reduced-motion .star-pill.is-bumped,
html.reduced-motion .say-btn.is-inviting,
html.reduced-motion .celebrate .reward-star { animation: none; }
html.reduced-motion .game-tile { transition: none; }