:root {
  --bg: #fff7ec;
  --card: #ffffff;
  --ink: #2b2233;
  --soft: #8a7f93;
  --accent: #e8573c;
  --accent-soft: #fde2d8;
  --tricky: #7b4fd6;
  --tricky-soft: #ece4fb;
  --glow: #ffd84d;
  --line: #eadfce;
  --shadow: 0 6px 20px rgba(80, 50, 20, 0.12);
}

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

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Andika', 'Comic Sans MS', system-ui, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

/* ---------- PIN ---------- */

.pin {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 16px;
}
.pin h1 { font-size: 44px; margin: 0; }
.pin .dots { display: flex; gap: 14px; height: 24px; }
.pin .dots span {
  width: 20px; height: 20px; border-radius: 50%;
  border: 3px solid var(--accent);
}
.pin .dots span.on { background: var(--accent); }
.pin .dots.shake { animation: shake 0.4s; }
.pin .keys {
  display: grid;
  grid-template-columns: repeat(3, 80px);
  gap: 14px;
}
.pin .keys button {
  height: 80px;
  border-radius: 50%;
  background: var(--card);
  box-shadow: var(--shadow);
  font-size: 32px;
  font-weight: 700;
}
.pin .keys button:active { transform: scale(0.94); }

@keyframes shake {
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* ---------- Library ---------- */

.library { max-width: 900px; margin: 0 auto; padding: 24px 16px 48px; }
.library h1 { font-size: 40px; margin: 8px 0 24px; }
.library h2 { font-size: 24px; color: var(--soft); margin: 24px 0 12px; }
.shelf {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}
.book {
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 18px 16px;
  text-align: left;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-bottom: 8px solid var(--accent);
}
.book:active { transform: scale(0.97); }
.book .num { font-size: 18px; color: var(--soft); }
.book .title { font-size: 24px; font-weight: 700; line-height: 1.2; flex: 1; }
.book .stars { font-size: 22px; min-height: 28px; }
.grownups { margin-top: 40px; color: var(--soft); font-size: 16px; }
.grownups summary { cursor: pointer; }
.grownups .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.grownups .chips span { background: var(--card); border-radius: 10px; padding: 2px 10px; }

/* ---------- Reader ---------- */

.reader {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 16px 16px;
}
.topbar { display: flex; align-items: center; gap: 12px; }
.topbar .title { flex: 1; font-size: 20px; color: var(--soft); text-align: center; }
.round {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--card); box-shadow: var(--shadow);
  font-size: 26px; display: grid; place-items: center;
  flex-shrink: 0;
}
.round:active { transform: scale(0.93); }
.round.spacer { visibility: hidden; }

.page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 4px;
}
.text {
  font-size: clamp(32px, 6.5vw, 54px);
  line-height: 1.9;
  max-width: 22ch;
  word-spacing: 0.12em;
}
.text .w {
  border-radius: 10px;
  padding: 0 2px;
  cursor: pointer;
  transition: background 0.15s;
}
.text .w.active { background: var(--accent-soft); }

.nav { display: flex; justify-content: space-between; align-items: center; }
.nav .round { width: 72px; height: 72px; font-size: 34px; }
.nav .round[disabled] { opacity: 0.25; }
.progress { display: flex; gap: 8px; }
.progress span { width: 12px; height: 12px; border-radius: 50%; background: var(--line); }
.progress span.on { background: var(--accent); }

/* ---------- Word popover ---------- */

.pop {
  position: fixed;
  z-index: 10;
  background: var(--card);
  border-radius: 22px;
  box-shadow: 0 12px 40px rgba(60, 30, 10, 0.25);
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  animation: pop 0.15s ease-out;
}
@keyframes pop { from { transform: scale(0.85); opacity: 0; } }

.chips { display: flex; gap: 6px; }
.chip {
  font-size: 44px;
  line-height: 1;
  padding: 10px 12px 14px;
  min-width: 52px;
  border-radius: 14px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.chip .mark { height: 8px; display: flex; justify-content: center; width: 100%; }
/* Sound buttons: a dot for one letter, a line for a digraph/trigraph. */
.chip .mark::after { content: ''; background: var(--accent); border-radius: 8px; }
.chip.one .mark::after { width: 10px; height: 10px; }
.chip.many .mark::after { width: 80%; height: 7px; }
.chip.lit { background: var(--glow); }

.whole { font-size: 44px; font-weight: 700; padding: 4px 12px; }
.badge {
  font-size: 18px;
  border-radius: 10px;
  padding: 2px 12px;
  background: var(--tricky-soft);
  color: var(--tricky);
}
.pop .actions { display: flex; gap: 10px; }
.pop .actions button {
  font-size: 22px;
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 8px 16px;
}

/* ---------- The End ---------- */

.end {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 16px;
  text-align: center;
}
.end .big { font-size: 64px; font-weight: 700; }
.end .stars { font-size: 72px; animation: pop 0.5s ease-out; }
.end button.next {
  font-size: 28px;
  background: var(--accent);
  color: white;
  border-radius: 20px;
  padding: 16px 32px;
  box-shadow: var(--shadow);
}
.end button.home { font-size: 22px; color: var(--soft); }