:root {
  --blue: #0d5eaf;
  --blue-dark: #0a4a8a;
  --blue-light: #eaf3fc;
  --ink: #1b2430;
  --muted: #5b6675;
  --ok: #1f9d55;
  --err: #c53030;
  --bg: #f7f9fb;
  --card: #ffffff;
  --border: #dbe4ee;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: white;
  padding: 28px 0 22px;
}
.site-header h1 { margin: 0 0 4px; font-size: 1.7rem; }
.tagline { margin: 0; opacity: .9; }

.lesson-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 14px 20px;
  max-width: 880px;
  margin: 0 auto;
  -webkit-overflow-scrolling: touch;
}
.lesson-nav button {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.lesson-nav button.active {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}
.lesson-nav button.done::after { content: " ✓"; }
.lesson-nav button:disabled {
  opacity: .45;
  cursor: not-allowed;
}

main.wrap { padding-top: 8px; padding-bottom: 48px; min-height: 50vh; }

.speech-warning {
  background: #fff7e6;
  border: 1px solid #f0c36d;
  color: #7a5b12;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .85rem;
  margin-top: 10px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}

.stage-heading { margin: 0 0 6px; font-size: 1.3rem; }
.stage-intro { color: var(--muted); margin-top: 0; }

.letter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.letter-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  background: var(--blue-light);
}
.letter-glyphs {
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--blue-dark);
  line-height: 1;
  margin-bottom: 6px;
}
.letter-name { font-weight: 600; }
.letter-translit { color: var(--muted); font-size: .85rem; margin-bottom: 6px; }
.letter-sound { font-size: .82rem; color: var(--muted); min-height: 2.4em; }

.speak-btn {
  margin-top: 10px;
  border: none;
  background: var(--blue);
  color: white;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: .85rem;
  cursor: pointer;
  font-weight: 600;
}
.speak-btn:hover { background: var(--blue-dark); }
.speak-btn:disabled { opacity: .5; cursor: not-allowed; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

.btn {
  border: none;
  background: var(--blue);
  color: white;
  padding: 11px 20px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--blue-dark); }
.btn.secondary {
  background: transparent;
  color: var(--blue);
  border: 1px solid var(--blue);
}
.btn.secondary:hover { background: var(--blue-light); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.link-btn {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  cursor: pointer;
  font-size: .8rem;
  padding: 0;
}

/* Quiz */
.quiz-progress { color: var(--muted); font-size: .85rem; margin-bottom: 8px; }
.quiz-question {
  text-align: center;
  margin: 20px 0;
}
.quiz-question .prompt-label { color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
.quiz-choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
  max-width: 520px;
  margin: 0 auto;
}
.choice-btn {
  border: 2px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 10px;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--ink);
}
.choice-btn:hover { border-color: var(--blue); }
.choice-btn.correct { border-color: var(--ok); background: #eafaf0; }
.choice-btn.wrong { border-color: var(--err); background: #fdecec; }
.choice-btn:disabled { cursor: default; }

.score-line { text-align: center; font-weight: 600; margin-top: 14px; }

/* Word building */
.word-block { margin-bottom: 26px; padding-bottom: 22px; border-bottom: 1px dashed var(--border); }
.word-block:last-child { border-bottom: none; }
.word-meaning { color: var(--muted); margin: 2px 0 12px; }
.word-slots {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  min-height: 52px;
  margin: 10px 0;
}
.slot {
  width: 42px;
  height: 48px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--blue-dark);
  background: var(--blue-light);
}
.slot.empty { background: var(--card); }
.tile-pool { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.tile {
  width: 42px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  font-size: 1.4rem;
  font-weight: 600;
  cursor: pointer;
}
.tile:disabled { opacity: .3; cursor: default; }
.word-feedback { min-height: 1.4em; font-weight: 600; margin-top: 4px; }
.word-feedback.ok { color: var(--ok); }
.word-feedback.err { color: var(--err); }

.summary-box { text-align: center; padding: 30px 20px; }
.summary-box .big-check { font-size: 2.6rem; }

.alphabet-review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 8px;
  margin: 16px 0;
}
.alphabet-review-grid .mini-letter {
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
  padding: 8px 4px;
  font-size: 1.3rem;
  background: var(--blue-light);
  color: var(--blue-dark);
  cursor: pointer;
}

/* Hangman */
.hangman-wrap { text-align: center; }
.hangman-figure { color: var(--blue-dark); margin: 4px auto 8px; display: block; }
.hg-word {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  margin: 8px 0 4px;
}
.hg-letter-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 40px;
  border-bottom: 3px solid var(--blue);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
}
.hg-keyboard {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  max-width: 560px;
  margin: 16px auto 0;
}
.hg-key {
  width: 40px;
  height: 44px;
  padding: 0;
  font-size: 1.1rem;
}

.roadmap-list { margin: 10px 0 0; padding-left: 22px; }
.roadmap-list li { margin-bottom: 6px; }
.roadmap-ready { color: var(--ink); font-weight: 600; }
.roadmap-soon { color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .82rem;
  padding: 20px 0 40px;
}
.site-footer p { margin: 4px 0; }
.reset-line { margin-top: 10px !important; }

@media (max-width: 480px) {
  .site-header h1 { font-size: 1.4rem; }
  .letter-glyphs { font-size: 2.2rem; }
}