/* GIA teaching practice. Loaded after /assets/site/shell.css; lives inside .px-card > .px-screen. */
:where(.gia-screen) *, :where(.gia-screen) *::before, :where(.gia-screen) *::after { margin: 0; padding: 0; }
.gia-screen {
  font-variant-numeric: tabular-nums;
  padding: 16px;
}
.gia-screen button { font-family: inherit; }
.gia-screen [hidden] { display: none !important; }
.gia-screen :focus-visible { outline-color: var(--g-ink); }
.gia .glyph-rot90 { transform: rotate(90deg); }
.gia .glyph-mirror { transform: scaleX(-1); }
.gia .px-lede { margin: 0 0 22px; }

.gia-about { margin-top: 36px; max-width: 46rem; }
.gia-about h2 { font: 800 1.45rem/1.25 var(--px-sans); margin: 0 0 .5rem; }
.gia-about p { margin: .8rem 0; max-width: 68ch; }
.gia-about .disc { color: var(--px-muted); }

.gia-screen .card, .gia-screen .app-header { max-width: 640px; margin-inline: auto; }

@media (min-width: 700px) { .gia-screen { padding: 28px; } }

/* Progress */
.gia .app-header { margin-bottom: 16px; }
.gia .progress-bar { height: 8px; background: #dde3da; border: 1px solid var(--g-edge); border-radius: 2px; overflow: hidden; }
.gia .progress-fill { height: 100%; width: 0%; background: var(--px-shell-lo); transition: width .4s ease; }
.gia .progress-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; font-size: 15px; color: var(--g-muted); }
.gia .score-chip b { color: var(--g-ink); }

/* Intro */
.gia .intro-rules { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 22px; }
.gia .intro-rule { background: #fff; border: 1px solid var(--g-line); border-radius: 2px; padding: 16px; }
.gia .intro-rule-title { font: 800 17px/1.3 var(--px-sans); margin-bottom: 8px; }
.gia .intro-rule-body p { font-size: 15px; color: var(--g-muted); line-height: 1.5; margin-bottom: 12px; }
.gia .intro-ex { display: flex; align-items: center; gap: 12px; background: var(--g-bg); border: 1px solid var(--g-line); border-radius: 2px; padding: 8px 12px; }
.gia .rule-mark { font-size: 15px; font-weight: 700; }

/* Question */
.gia .q-title { font: 800 22px/1.3 var(--px-sans); text-align: center; text-wrap: balance; }
.gia .q-sub { color: var(--g-muted); font-size: 16px; margin: 6px 0 4px; text-align: center; }
.gia .q-type { color: var(--g-muted); font-size: 14px; text-align: center; margin-bottom: 18px; }

.gia .glyph { display: inline-block; font: 800 44px/1 var(--px-sans); user-select: none; color: var(--g-ink); }

.gia .boxes { display: flex; justify-content: center; gap: 22px; margin-bottom: 24px; }
.gia .letter-box { border: 2px solid var(--g-edge); border-radius: 2px; width: 120px; padding: 12px 0 18px; display: flex; flex-direction: column; align-items: center; gap: 18px; background: #fff; }
.gia .box-label { font-size: 14px; font-weight: 700; color: var(--g-muted); }

.gia .options { display: flex; justify-content: center; gap: 14px; margin-bottom: 8px; }
.gia .ans-btn { width: 72px; height: 56px; font-size: 22px; font-weight: 800; border: 2px solid var(--g-edge); background: #fff; border-radius: 2px; cursor: pointer; transition: background-color .15s, border-color .15s; color: var(--g-ink); padding: 0; }
.gia .ans-btn:hover:not(:disabled) { background: var(--g-tint); border-color: var(--g-ink); }
.gia .ans-btn.is-correct { border-color: var(--g-ok); background: var(--g-ok-bg); }
.gia .ans-btn.is-wrong { border-color: var(--g-bad); background: var(--g-bad-bg); }
.gia .ans-btn:disabled { cursor: default; color: var(--g-ink); }

/* Teaching */
.gia .teaching { margin-top: 24px; border-top: 1px solid var(--g-line); padding-top: 20px; }
.gia .verdict { border-radius: 2px; padding: 12px 16px; font-size: 16px; line-height: 1.5; margin-bottom: 16px; border: 1px solid; }
.gia .verdict.ok { background: var(--g-ok-bg); border-color: var(--g-ok-line); }
.gia .verdict.bad { background: var(--g-bad-bg); border-color: var(--g-bad-line); }
.gia .banner-detail { margin-top: 4px; color: var(--g-ink); font-size: 15px; }

.gia .teach-rows { display: flex; flex-direction: column; gap: 10px; }
.gia .teach-row { display: flex; align-items: center; gap: 14px; background: #fff; border: 1px solid var(--g-line); border-radius: 2px; padding: 12px 14px; }
.gia .teach-label { flex-shrink: 0; width: 56px; font-size: 14px; font-weight: 700; color: var(--g-muted); }
.gia .teach-stage { flex-shrink: 0; display: flex; align-items: center; gap: 8px; }
.gia .mini-box { width: 56px; height: 56px; border: 1.5px solid var(--g-edge); border-radius: 2px; background: var(--g-bg); display: flex; align-items: center; justify-content: center; }
.gia .mini-box .glyph { font-size: 30px; }
.gia .mini-arrow { color: var(--g-muted); font-size: 16px; font-weight: 700; }
.gia .teach-verdict { font-size: 15px; line-height: 1.5; color: var(--g-ink); }
.gia .ok-text { color: var(--g-ok); }
.gia .bad-text { color: var(--g-bad); }

.gia .rule-card { margin-top: 16px; background: var(--g-tint); border: 1px solid var(--g-line); border-radius: 2px; padding: 14px 16px; }
.gia .rule-title { font: 800 16px/1.3 var(--px-sans); margin-bottom: 6px; }
.gia .rule-card p { font-size: 15px; line-height: 1.6; color: var(--g-ink); }
.gia .rule-examples { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }
.gia .rule-ex { display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--g-line); border-radius: 2px; padding: 6px 12px; }
.gia .rule-ex .glyph { font-size: 26px; }
.gia .replay-btn { margin-top: 14px; }

/* Buttons */
.gia .btn { border: 1px solid transparent; border-radius: 2px; padding: 10px 22px; min-height: 44px; font-size: 16px; font-weight: 700; cursor: pointer; transition: background-color .15s; }
.gia .btn-primary { background: var(--px-shell); color: var(--px-print); }
.gia .btn-primary:hover { background: var(--px-shell-lo); }
.gia .btn-ghost { background: #fff; color: var(--g-ink); border-color: var(--g-edge); }
.gia .btn-ghost:hover { background: var(--g-tint); }
.gia .btn-lg { width: 100%; padding: 14px; font-size: 17px; }
.gia .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

/* Results */
.gia .results { text-align: center; }
.gia .results h2 { font: 800 22px/1.3 var(--px-sans); margin-bottom: 14px; }
.gia .final-score { font: 400 44px/1.15 var(--px-pixel); color: var(--g-ink); }
.gia .final-pct { font-size: 20px; font-weight: 700; color: var(--g-muted); margin-top: 4px; }
.gia .final-msg { font-size: 16px; color: var(--g-ink); margin: 14px 0 20px; line-height: 1.5; }
.gia .review-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; text-align: left; }
.gia .review-row { display: flex; align-items: center; gap: 12px; background: #fff; border: 1px solid var(--g-line); border-radius: 2px; padding: 8px 14px; font-size: 16px; font-weight: 600; }
.gia .review-q { flex: 1; color: var(--g-ink); font-weight: 400; }
.gia .review-btn { padding: 6px 14px; font-size: 15px; }

@media (max-width: 600px) {
  .gia .intro-rules { grid-template-columns: 1fr; }
  .gia .teach-row { flex-wrap: wrap; }
  .gia .teach-verdict { width: 100%; }
  .gia .letter-box { width: 104px; }
  .gia .boxes { gap: 14px; }
  .gia .final-score { font-size: 36px; }
}
@media (prefers-color-scheme: dark) {
  .gia-screen { border: 2px solid #0f1810; box-shadow: 0 0 0 1px rgba(214, 245, 226, .22), 0 14px 32px -16px rgba(0, 0, 0, .75); }
}
@media (prefers-reduced-motion: reduce) { .gia .progress-fill, .gia .btn, .gia .ans-btn { transition: none; } }