* { box-sizing: border-box; }
[v-cloak] { display: none; }

:root {
  --blue: #1e3a8a;
  --bg: #f1f5f9;
  --card: #fff;
  --border: #cbd5e1;
  --good: #15803d;
  --bad: #b91c1c;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: #0f172a;
}

#app { max-width: 640px; margin: 0 auto; padding: 0 0.75rem 3rem; }

h1 { color: var(--blue); }

nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
}
nav h1 { flex: 1; margin: 0; font-size: 1.4rem; }
nav button.active { background: var(--blue); color: #fff; border-color: var(--blue); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin: 0.75rem 0;
}

input, button {
  font: inherit;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  min-height: 44px; /* touch target */
}
input { width: 100%; }
input[lang="th"], .thai { font-size: 1.4rem; }
button { cursor: pointer; }
button:active { background: #e2e8f0; }

.row { display: flex; gap: 0.5rem; }
.add { display: flex; flex-direction: column; gap: 0.5rem; }
.add > .row > button:first-child, form button[type="submit"] { flex: 1; }
.kb-toggle.active { background: var(--blue); color: #fff; border-color: var(--blue); }

/* word list */
.words { list-style: none; margin: 0; padding: 0; }
.words li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.5rem 0.75rem;
  margin: 0.5rem 0;
}
.words .txt { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.words .thai { font-size: 1.5rem; }
.words .phon { color: #64748b; font-size: 0.85rem; }
.boxes {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 0 0.4rem;
  font-size: 0.7rem;
  color: #64748b;
  line-height: 1.4;
}
.speak { border: none; background: none; font-size: 1.3rem; }
.speak.big { font-size: 1.5rem; padding: 0.75rem 1.5rem; }

/* meaning chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.center-chips { justify-content: center; margin: 0.5rem 0; }
.chip {
  padding: 0.25rem 0.6rem;
  min-height: 0;
  border-radius: 999px;
  font-size: 0.95rem;
}
.good-chip { border-color: var(--good); color: var(--good); }
.bad-chip { border-color: var(--bad); color: var(--bad); }

/* practice */
.modes { display: grid; gap: 0.5rem; }
.modes h3 { margin: 0.5rem 0 0; font-size: 0.85rem; color: #64748b; text-transform: uppercase; letter-spacing: 0.05em; }
.modes button { display: flex; flex-direction: column; align-items: flex-start; gap: 0.25rem; text-align: left; }
.modes small { color: #64748b; }
.quiz form { display: flex; flex-direction: column; gap: 0.5rem; }
.progress { color: #64748b; font-size: 0.85rem; margin-top: 0; }
.prompt { font-size: 1.6rem; text-align: center; margin: 1.5rem 0; }
.prompt.thai { font-size: 2.4rem; }
.answer { text-align: center; font-size: 1.3rem; margin: 0.5rem 0; }
.answer.thai { font-size: 2rem; }
.center { text-align: center; }
.good { color: var(--good); font-weight: 600; text-align: center; }
.bad { color: var(--bad); font-weight: 600; text-align: center; }
.good-btn, .bad-btn { flex: 1; color: #fff; border: none; }
.good-btn { background: var(--good); }
.bad-btn { background: var(--bad); }

/* tts voice picker */
.voice { display: flex; align-items: center; gap: 0.5rem; margin-top: 1rem; color: #64748b; font-size: 0.9rem; }
.voice select { font: inherit; padding: 0.4rem 0.6rem; border: 1px solid var(--border); border-radius: 8px; background: #fff; }

/* login */
.login { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 15vh; text-align: center; }
.link { border: none; background: none; color: var(--blue); text-decoration: underline; }
.logout { max-width: 9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* on-screen thai keyboard */
.kb { user-select: none; }
.kb-row { display: flex; gap: 3px; margin-bottom: 3px; }
.kb-row button {
  flex: 1;
  min-width: 0;
  min-height: 42px;
  padding: 0.4rem 0;
  font-size: 1.15rem;
  border-radius: 6px;
}
.kb-row .kb-wide { flex: 1.6; }
.kb-row .kb-space { flex: 5; }
.kb-row button.active { background: var(--blue); color: #fff; }