/* ============== SE Speed Drill — scoped styles ==============
   Every rule is scoped under #screen-speeddrill so it can't clash with the
   V-Breadth app's global classes (.btn, .card, .badge, .timer, .screen,
   .progress-bar, .stat-card, etc.). CSS variables are renamed --sd-*. */

#screen-speeddrill {
  --sd-bg: #1a1a2e;
  --sd-bg2: #16213e;
  --sd-bg3: #0f3460;
  --sd-fg: #e8e8e8;
  --sd-fg2: #a0a0b0;
  --sd-accent: #e94560;
  --sd-green: #2ecc71;
  --sd-yellow: #f1c40f;
  --sd-red: #e74c3c;
  --sd-radius: 8px;
  background: var(--sd-bg);
  color: var(--sd-fg);
}
#screen-speeddrill.active { display: flex; flex-direction: column; height: 100dvh; }
#sd-root { flex: 1; min-height: 0; display: flex; flex-direction: column; }

/* Panes: home / result / summary scroll; drilling / review fill height */
#screen-speeddrill .sd-pane { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; }
#screen-speeddrill .sd-flex { flex: 1; min-height: 0; display: flex; flex-direction: column; }

#screen-speeddrill button { font: inherit; cursor: pointer; border: none; }
#screen-speeddrill input, #screen-speeddrill select { font: inherit; }

/* Buttons */
#screen-speeddrill .btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 10px 18px; border-radius: var(--sd-radius); font-weight: 600;
  transition: opacity 0.15s; -webkit-tap-highlight-color: transparent; color: var(--sd-fg);
}
#screen-speeddrill .btn:active { opacity: 0.7; }
#screen-speeddrill .btn--primary { background: var(--sd-accent); color: #fff; }
#screen-speeddrill .btn--secondary { background: var(--sd-bg3); color: var(--sd-fg); }
#screen-speeddrill .btn--lg { padding: 14px 24px; font-size: 1.1rem; width: 100%; }
#screen-speeddrill .btn--sm { padding: 6px 12px; font-size: 0.85rem; }
#screen-speeddrill .btn--ghost { background: transparent; color: var(--sd-fg2); text-decoration: underline; }

/* Cards / badges */
#screen-speeddrill .badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; font-weight: 700; }
#screen-speeddrill .badge--green { background: var(--sd-green); color: #000; }
#screen-speeddrill .badge--yellow { background: var(--sd-yellow); color: #000; }
#screen-speeddrill .badge--red { background: var(--sd-red); color: #fff; }
#screen-speeddrill .badge--info { background: var(--sd-bg3); color: var(--sd-fg); }

/* Home */
#screen-speeddrill .home { padding: 20px 16px; text-align: center; }
#screen-speeddrill .home h1 { font-size: 1.6rem; margin-bottom: 4px; }
#screen-speeddrill .home .subtitle { color: var(--sd-fg2); margin-bottom: 20px; }
#screen-speeddrill .home__logo { font-size: 3rem; margin-bottom: 8px; }
#screen-speeddrill .setup-section { text-align: left; margin: 16px 0; }
#screen-speeddrill .setup-section label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--sd-fg2); font-size: 0.9rem; }
#screen-speeddrill .setup-section select {
  width: 100%; padding: 10px 12px; border-radius: var(--sd-radius);
  background: var(--sd-bg2); color: var(--sd-fg); border: 1px solid var(--sd-bg3);
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a0a0b0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
#screen-speeddrill .count-btns { display: flex; gap: 8px; margin-top: 4px; }
#screen-speeddrill .count-btns .btn { flex: 1; background: var(--sd-bg3); }
#screen-speeddrill .count-btns .btn.active { background: var(--sd-accent); color: #fff; }

/* Stats */
#screen-speeddrill .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0; }
#screen-speeddrill .stat-card { background: var(--sd-bg2); border-radius: var(--sd-radius); padding: 12px 8px; text-align: center; }
#screen-speeddrill .stat-card__val { font-size: 1.4rem; font-weight: 700; }
#screen-speeddrill .stat-card__label { font-size: 0.75rem; color: var(--sd-fg2); display: block; margin-top: 2px; }
#screen-speeddrill .book-stats { margin: 16px 0; text-align: left; }
#screen-speeddrill .book-stat-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; background: var(--sd-bg2); border-radius: var(--sd-radius); margin-bottom: 4px; }
#screen-speeddrill .book-stat-row__name { font-weight: 600; font-size: 0.9rem; }
#screen-speeddrill .book-stat-row__vals { display: flex; gap: 12px; font-size: 0.8rem; color: var(--sd-fg2); }

/* Drill header */
#screen-speeddrill .drill-header { background: var(--sd-bg2); padding: 8px 12px; border-bottom: 1px solid var(--sd-bg3); flex-shrink: 0; }
#screen-speeddrill .drill-header__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
#screen-speeddrill .drill-header__prompt { font-size: 1.05rem; line-height: 1.45; padding: 6px 0; max-height: 4.35em; overflow: hidden; }
#screen-speeddrill .drill-header__prompt.expanded { max-height: none; }
#screen-speeddrill .timer { font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }
#screen-speeddrill .timer--green { color: var(--sd-green); }
#screen-speeddrill .timer--yellow { color: var(--sd-yellow); }
#screen-speeddrill .timer--red { color: var(--sd-red); }

/* Progress bar */
#screen-speeddrill .progress-bar { display: flex; gap: 2px; height: 4px; margin-bottom: 6px; }
#screen-speeddrill .progress-seg { flex: 1; border-radius: 2px; background: var(--sd-bg3); }
#screen-speeddrill .progress-seg--green { background: var(--sd-green); }
#screen-speeddrill .progress-seg--yellow { background: var(--sd-yellow); }
#screen-speeddrill .progress-seg--red { background: var(--sd-red); }

/* Book list */
#screen-speeddrill .book-list { padding: 8px; }
#screen-speeddrill .book-btn { display: flex; align-items: center; gap: 12px; width: 100%; padding: 14px 12px; background: var(--sd-bg2); border-radius: var(--sd-radius); color: var(--sd-fg); margin-bottom: 6px; text-align: left; }
#screen-speeddrill .book-btn__icon { font-size: 1.5rem; width: 40px; text-align: center; flex-shrink: 0; }
#screen-speeddrill .book-btn__name { font-weight: 600; font-size: 1rem; }
#screen-speeddrill .book-btn__pages { font-size: 0.8rem; color: var(--sd-fg2); }

/* Book viewer */
#screen-speeddrill .book-viewer { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#screen-speeddrill .toc-drawer { background: var(--sd-bg2); max-height: 40vh; overflow-y: auto; border-bottom: 1px solid var(--sd-bg3); transition: max-height 0.3s; flex-shrink: 0; }
#screen-speeddrill .toc-drawer.collapsed { max-height: 0; overflow: hidden; }
#screen-speeddrill .toc-toggle { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--sd-bg3); color: var(--sd-fg); width: 100%; font-weight: 600; font-size: 0.85rem; flex-shrink: 0; }
#screen-speeddrill .toc-toggle svg { transition: transform 0.2s; }
#screen-speeddrill .toc-toggle.open svg { transform: rotate(180deg); }
#screen-speeddrill .toc-search { display: flex; align-items: center; gap: 6px; padding: 6px 10px; background: var(--sd-bg); margin: 6px 8px; border-radius: var(--sd-radius); }
#screen-speeddrill .toc-search input { flex: 1; background: transparent; border: none; color: var(--sd-fg); outline: none; font-size: 0.85rem; }
#screen-speeddrill .toc-item { display: block; width: 100%; text-align: left; padding: 6px 10px; background: transparent; color: var(--sd-fg); font-size: 0.8rem; border-bottom: 1px solid rgba(255,255,255,0.05); -webkit-tap-highlight-color: transparent; }
#screen-speeddrill .toc-item:active { background: var(--sd-bg3); }
#screen-speeddrill .toc-item.active { background: var(--sd-accent); color: #fff; }
#screen-speeddrill .toc-item__num { color: var(--sd-fg2); margin-right: 4px; font-weight: 600; }
#screen-speeddrill .toc-item.active .toc-item__num { color: #fff; }
#screen-speeddrill .toc-row { display: flex; align-items: stretch; border-bottom: 1px solid rgba(255,255,255,0.05); }
#screen-speeddrill .toc-row.active { background: var(--sd-accent); }
#screen-speeddrill .toc-row.active .toc-row__label,
#screen-speeddrill .toc-row.active .toc-item__num,
#screen-speeddrill .toc-row.active .toc-chev { color: #fff; }
#screen-speeddrill .toc-chev { flex-shrink: 0; width: 28px; display: flex; align-items: center; justify-content: center; background: transparent; color: var(--sd-fg2); -webkit-tap-highlight-color: transparent; }
#screen-speeddrill .toc-chev:active { background: var(--sd-bg3); }
#screen-speeddrill .toc-chev-spacer { flex-shrink: 0; width: 28px; }
#screen-speeddrill .toc-row__label { flex: 1; min-width: 0; text-align: left; padding: 6px 10px 6px 0; background: transparent; color: var(--sd-fg); font-size: 0.8rem; -webkit-tap-highlight-color: transparent; white-space: normal; word-break: break-word; }
#screen-speeddrill .toc-row__label:active { background: var(--sd-bg3); }

/* Page viewer */
#screen-speeddrill .page-viewer { flex: 1 1 0; min-height: 0; overflow: hidden; position: relative; background: #222; touch-action: none; }
#screen-speeddrill .page-viewer img { display: block; position: absolute; left: 50%; top: 50%; max-width: 100%; max-height: 100%; width: auto; height: auto; transform: translate(-50%, -50%); transform-origin: center center; user-select: none; -webkit-user-select: none; will-change: transform; }
#screen-speeddrill .page-viewer__loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--sd-fg2); font-size: 0.95rem; }
#screen-speeddrill .page-viewer__hint { position: absolute; bottom: 6px; right: 8px; font-size: 0.7rem; color: #ffffff99; pointer-events: none; background: #00000055; padding: 2px 6px; border-radius: 10px; }

/* Page nav */
#screen-speeddrill .page-nav { display: flex; align-items: center; gap: 6px; padding: 8px 10px; background: var(--sd-bg2); border-top: 1px solid var(--sd-bg3); flex-shrink: 0; }
#screen-speeddrill .page-nav .btn { padding: 10px 14px; font-size: 1rem; background: var(--sd-bg3); }
#screen-speeddrill .page-nav__input { width: 64px; text-align: center; padding: 8px 4px; background: var(--sd-bg); color: var(--sd-fg); border: 1px solid var(--sd-bg3); border-radius: var(--sd-radius); font-size: 1rem; font-weight: 600; }
#screen-speeddrill .page-nav__total { font-size: 0.9rem; color: var(--sd-fg2); }
#screen-speeddrill .page-nav__spacer { flex: 1; }

/* Found It */
#screen-speeddrill .found-btn { display: block; width: calc(100% - 16px); margin: 0 8px 8px; padding: 16px; background: var(--sd-green); color: #fff; font-size: 1.15rem; font-weight: 700; border-radius: var(--sd-radius); -webkit-tap-highlight-color: transparent; flex-shrink: 0; max-height: 60px; }
#screen-speeddrill .found-btn:active { opacity: 0.7; }

@media (max-height: 500px) and (orientation: landscape) {
  #screen-speeddrill .toc-toggle { padding: 6px 10px; }
  #screen-speeddrill .drill-header { padding: 4px 10px; }
  #screen-speeddrill .drill-header__prompt { font-size: 0.85rem; max-height: 2.4em; padding: 2px 0; }
  #screen-speeddrill .page-nav { padding: 4px 8px; }
  #screen-speeddrill .page-nav .btn { padding: 6px 10px; }
  #screen-speeddrill .page-nav__input { padding: 4px; width: 56px; }
  #screen-speeddrill .found-btn { padding: 10px; font-size: 1rem; margin: 0 8px 4px; max-height: 44px; }
}

/* Result */
#screen-speeddrill .result { padding: 16px; text-align: center; }
#screen-speeddrill .result__icon { font-size: 3rem; margin-bottom: 8px; }
#screen-speeddrill .result__title { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }
#screen-speeddrill .result__answer { background: var(--sd-bg2); border-radius: var(--sd-radius); padding: 12px; margin: 12px 0; text-align: left; }
#screen-speeddrill .result__answer-book { font-weight: 700; color: var(--sd-accent); }
#screen-speeddrill .result__answer-section { color: var(--sd-fg2); font-size: 0.9rem; }
#screen-speeddrill .result--correct .result__title { color: var(--sd-green); }
#screen-speeddrill .result--wrong .result__title { color: var(--sd-red); }

/* Review */
#screen-speeddrill .review-banner { background: var(--sd-bg2); padding: 8px 12px; border-bottom: 1px solid var(--sd-bg3); border-left: 4px solid var(--sd-red); flex-shrink: 0; }
#screen-speeddrill .review-banner__top { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; }
#screen-speeddrill .review-banner__pos { font-size: 0.8rem; color: var(--sd-fg2); font-variant-numeric: tabular-nums; white-space: nowrap; }
#screen-speeddrill .review-banner__answer { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; margin-bottom: 6px; font-size: 0.85rem; line-height: 1.35; }
#screen-speeddrill .review-banner__book { font-weight: 700; color: var(--sd-accent); }
#screen-speeddrill .review-banner__sect { color: var(--sd-fg); }
#screen-speeddrill .review-banner__pages { color: var(--sd-fg2); font-size: 0.8rem; }
#screen-speeddrill .review-banner__nav { display: flex; gap: 6px; }
#screen-speeddrill .review-banner__nav .btn { flex: 1; }
#screen-speeddrill .review-banner__nav .btn:disabled { opacity: 0.35; }
#screen-speeddrill .review-continue { display: block; width: calc(100% - 16px); margin: 8px; padding: 14px; background: var(--sd-accent); color: #fff; font-size: 1.05rem; font-weight: 700; border-radius: var(--sd-radius); -webkit-tap-highlight-color: transparent; flex-shrink: 0; }
#screen-speeddrill .review-continue:active { opacity: 0.7; }

/* Summary */
#screen-speeddrill .summary { padding: 16px; text-align: center; }
#screen-speeddrill .summary h2 { margin-bottom: 12px; }
#screen-speeddrill .color-bar { display: flex; height: 20px; border-radius: var(--sd-radius); overflow: hidden; margin: 12px 0; }
#screen-speeddrill .color-bar__seg { display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; }
#screen-speeddrill .color-bar__seg--green { background: var(--sd-green); color: #000; }
#screen-speeddrill .color-bar__seg--yellow { background: var(--sd-yellow); color: #000; }
#screen-speeddrill .color-bar__seg--red { background: var(--sd-red); color: #fff; }
#screen-speeddrill .summary-drills { text-align: left; margin: 16px 0; }
#screen-speeddrill .summary-drill { display: flex; align-items: center; gap: 8px; padding: 8px; background: var(--sd-bg2); border-radius: var(--sd-radius); margin-bottom: 4px; }
#screen-speeddrill .summary-drill__dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
#screen-speeddrill .summary-drill__text { flex: 1; font-size: 0.8rem; line-height: 1.3; }
#screen-speeddrill .summary-drill__time { font-size: 0.85rem; font-weight: 700; white-space: nowrap; }

/* ── Question recall on reveal (so you re-read what was asked) ── */
#screen-speeddrill .sd-qrecall {
  background: var(--sd-bg3); color: var(--sd-fg); border-radius: var(--sd-radius);
  padding: 10px 12px; margin: 10px 0; font-size: 0.95rem; line-height: 1.4;
  text-align: left; word-break: break-word;
}
#screen-speeddrill .sd-qrecall--review { margin: 6px 0; font-size: 0.85rem; padding: 8px 10px; }

/* ── Teaching block (what / why / memorize / traps) ── */
#screen-speeddrill .sd-teach {
  text-align: left; background: var(--sd-bg2); border-left: 3px solid var(--sd-accent);
  border-radius: 0 var(--sd-radius) var(--sd-radius) 0; padding: 10px 12px; margin: 10px 0;
}
#screen-speeddrill .sd-teach-row { margin-bottom: 8px; }
#screen-speeddrill .sd-teach-row:last-child { margin-bottom: 0; }
#screen-speeddrill .sd-teach-label {
  display: inline-block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--sd-accent); margin-bottom: 2px;
}
#screen-speeddrill .sd-teach-text { font-size: 0.88rem; line-height: 1.45; color: var(--sd-fg); }

/* ── Flag bar (short list / drop / note) on reveals ── */
#screen-speeddrill .sd-flagbar { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px; }
#screen-speeddrill .sd-flagbtn {
  padding: 7px 12px; border-radius: 8px; font-size: 0.8rem; font-weight: 600;
  background: var(--sd-bg2); color: var(--sd-fg); border: 1px solid var(--sd-bg3);
}
#screen-speeddrill .sd-flagbtn:active { opacity: 0.7; }
#screen-speeddrill .sd-short.on { background: #3a2f15; border-color: #e3b341; color: #f2cc60; }
#screen-speeddrill .sd-drop.on { background: #3a1d1d; border-color: var(--sd-red); color: #ff9a8d; }
#screen-speeddrill .sd-notepanel { text-align: left; margin-top: 8px; }
#screen-speeddrill .sd-notetext {
  width: 100%; background: var(--sd-bg); color: var(--sd-fg); border: 1px solid var(--sd-bg3);
  border-radius: var(--sd-radius); padding: 8px; font-size: 0.9rem; resize: vertical;
}
#screen-speeddrill .sd-noteactions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 6px; }
#screen-speeddrill .sd-notelist { margin-top: 8px; }
#screen-speeddrill .sd-noteitem {
  background: var(--sd-bg2); border-radius: var(--sd-radius); padding: 8px 10px;
  font-size: 0.85rem; line-height: 1.4; margin-bottom: 4px; white-space: pre-wrap;
}
#screen-speeddrill .sd-notecard {
  text-align: left; background: var(--sd-bg2); border-radius: var(--sd-radius);
  padding: 10px 12px; margin-bottom: 8px;
}
#screen-speeddrill .sd-notecard-q { font-size: 0.78rem; color: var(--sd-fg2); margin-bottom: 6px; }

/* ── Reveal page-view: thin top bar with the verdict + "back to answer"
      toggle, plus a maximize mode that hides the chrome for a big page. ── */
#screen-speeddrill .sd-reveal-pagebar {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 6px 10px; background: var(--sd-bg2); border-bottom: 1px solid var(--sd-bg3); flex-shrink: 0;
}
#screen-speeddrill .sd-pagemax .sd-reveal-pagebar,
#screen-speeddrill .sd-pagemax .review-continue { display: none; }

/* ── Portrait overflow fix: long prompts wrap + the expanded prompt scrolls
      instead of pushing the book list / viewer off-screen. ── */
#screen-speeddrill .drill-header__prompt { word-break: break-word; overflow-wrap: anywhere; }
#screen-speeddrill .drill-header__prompt.expanded { max-height: 30vh; overflow-y: auto; }