/* ==========================================================================
   Primary play: the Grade 1 alphabet board and the Grade 2 songs.

   Loaded only by the two pages that use it, so none of this weight falls on
   the rest of the site. Motion is small and slow on purpose - these pages are
   for five- to seven-year-olds, often in a classroom, and anything busy pulls
   attention away from the letter or the words.
   ========================================================================== */

/* ------------------------------------------------------------ alphabet */

/* Without the script: the whole alphabet as a readable list. */
.abc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
  gap: var(--sp-2);
}
.abc__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}
.abc__pair { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; color: var(--navy-800); }
.abc__word { color: var(--ink-700); }

/* With the script the list is replaced by the board. */
.abc--ready .abc__list { display: none; }

.abc__app {
  max-width: 34rem;
  margin: 0 auto;
  padding: var(--sp-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #f6f9fd, #fff);
  border: 1px solid var(--line);
}

.abc__toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}
.abc__case { display: flex; gap: 0.35rem; }

.abc__chip {
  min-height: 44px;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--navy-800);
  font-weight: 600;
  font-size: var(--step--1);
  cursor: pointer;
}
.abc__chip[aria-pressed="true"] {
  background: var(--navy-800);
  border-color: var(--navy-800);
  color: #fff;
}

.abc__stage {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--sp-2);
}
.abc__nav {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--navy-800);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
}

.abc__board {
  position: relative;
  width: 100%;
  max-width: 22rem;
  margin: 0 auto;
  aspect-ratio: 120 / 130;
  border-radius: var(--radius-md);
  background: #fffdf5;
  box-shadow: inset 0 0 0 1px #e8dfc6, 0 6px 18px rgba(15, 38, 71, 0.08);
  overflow: hidden;
}
.abc__svg { display: block; width: 100%; height: 100%; }

/* The copy-book lines: two firm, a dashed middle, a faint tail line. */
.abc__rule { stroke: #8fb0d6; stroke-width: 0.6; }
.abc__rule--mid { stroke-dasharray: 2 2; }
.abc__rule--base { stroke: #d98c8c; stroke-width: 0.7; }
.abc__rule--desc { stroke: #c9d8ea; }

.abc__stroke {
  fill: none;
  stroke: var(--navy-800);
  stroke-width: 5.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.is-tracing .abc__stroke {
  stroke: #b7c4d6;
  stroke-width: 4;
  stroke-dasharray: 0.1 6.5;
}

.abc__start circle { fill: #0e7c66; }
.abc__start text {
  fill: #fff;
  font: 700 5px/1 system-ui, sans-serif;
  text-anchor: middle;
}
.abc__start.is-now circle { fill: #c2913f; }

.abc__pen {
  fill: #e8704f;
  stroke: #fff;
  stroke-width: 1.2;
  opacity: 0;
}
.abc__pen.is-on { opacity: 1; }

.abc__trace {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.abc__caption {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 3.2rem;
  margin: var(--sp-3) 0;
  text-align: center;
}
.abc__cap-emoji { font-size: 2rem; }
.abc__cap-letter {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--navy-800);
}
.abc__cap-word { font-size: var(--step-1); color: var(--ink-700); }

.abc__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
}
.abc__btn {
  min-height: 44px;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--navy-800);
  font-weight: 700;
  cursor: pointer;
}
.abc__btn--main { background: #0e7c66; border-color: #0e7c66; color: #fff; }
.abc__btn[aria-pressed="true"] { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }

.abc__picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 0.35rem;
  margin-top: var(--sp-4);
}
.abc__pick {
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy-800);
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
}
.abc__pick.is-on { background: #c2913f; border-color: #c2913f; color: #fff; }


/* On a phone the arrows move under the board, so the board can use the full
   width. Tracing with a finger needs the room far more than the arrows need to
   sit beside it. */
@media (max-width: 480px) {
  .abc__app { padding: var(--sp-3); }
  .abc__stage {
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "board board" "prev next";
    row-gap: var(--sp-2);
  }
  .abc__board { grid-area: board; max-width: none; }
  .abc__nav[data-step="-1"] { grid-area: prev; justify-self: start; }
  .abc__nav[data-step="1"] { grid-area: next; justify-self: end; }
}

/* -------------------------------------------------------------- songs */

.songs { display: grid; gap: var(--sp-5); }

.songs__sound {
  min-height: 44px;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--navy-800);
  font-weight: 600;
  cursor: pointer;
  justify-self: start;
}

.songs__volume {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  justify-self: start;
  min-height: 44px;
  font-weight: 600;
  color: var(--navy-800);
}
.songs__volume select {
  min-height: 44px;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  font: inherit;
}

.song {
  position: relative;
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 4px 14px rgba(15, 38, 71, 0.06);
}

.song__head { display: flex; align-items: center; gap: var(--sp-3); }
.song__stage {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #e6f3f8);
  box-shadow: inset 0 0 0 1px #d4e6ee;
}
.song__emoji { font-size: 2.1rem; line-height: 1; }
.song__title { margin: 0; color: var(--navy-800); }
.song__meta { margin: 0.15rem 0 0; font-size: var(--step--1); color: var(--ink-700); }

.song__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin: var(--sp-3) 0;
}
.song__btn {
  min-height: 44px;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--navy-800);
  font-weight: 700;
  cursor: pointer;
}
.song__btn--play { background: #0e7c66; border-color: #0e7c66; color: #fff; }
.song__btn--stop { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }
.song__slow { display: inline-flex; align-items: center; gap: 0.35rem; min-height: 44px; font-size: var(--step--1); }

.song__verses { display: grid; gap: var(--sp-3); }
.song__verse { padding-left: 0.2rem; }
.song__line {
  margin: 0.1rem 0;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  line-height: 1.7;
  color: var(--navy-800);
  transition: background-color 0.25s ease;
}
.song__line.is-current { background: #eef5fb; }

.syl {
  display: inline-block;
  border-radius: 0.35rem;
  transition: background-color 0.12s ease, transform 0.12s ease;
}
.syl.is-on {
  background: #fbe7b5;
  transform: translateY(-2px);
}

/* A gentle nod of the picture on each note. */
.song__stage.is-bob { animation: song-bob 0.32s ease-out; }
@keyframes song-bob {
  0% { transform: translateY(0) scale(1); }
  45% { transform: translateY(-4px) scale(1.06); }
  100% { transform: translateY(0) scale(1); }
}

/* A small musical note drifting up while the tune plays. */
.song--playing .song__stage::after {
  content: "\266A";
  position: absolute;
  top: -0.2rem;
  right: -0.4rem;
  font-size: 1rem;
  color: #0e7c66;
  animation: song-note 1.8s ease-out infinite;
  pointer-events: none;
}
@keyframes song-note {
  0% { transform: translate(0, 6px); opacity: 0; }
  30% { opacity: 0.9; }
  100% { transform: translate(8px, -22px); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .syl, .song__line { transition: none; }
  .syl.is-on { transform: none; }
  .song__stage.is-bob { animation: none; }
  .song--playing .song__stage::after { animation: none; content: none; }
}

@media print {
  .abc__app, .song__controls, .songs__sound { display: none !important; }
  .abc--ready .abc__list { display: grid; }
}