/* q-single.css - shared styles for single-screen question pages.
   Loaded by every page in /q/ alongside style.css.
   Question pages use .ss-* class prefix to avoid clashes with the older layout. */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&display=swap');

:root {
  --bg:#eef4ff; --surface:#ffffff;
  --ink:#1a1a40; --ink-soft:#5b5b80; --ink-faint:#a0a4c2;
  --primary:#6f5af6; --primary-deep:#4c39d4; --primary-soft:#f3effe;
  --gold:#f5b400; --gold-soft:#fff6d9;
  --correct:#22c55e; --correct-soft:#dcfce7;
  --wrong:#ef4444; --wrong-soft:#fee2e2;
  --hint:#0ea5e9; --hint-soft:#e0f2fe;
  --gray:#e1e8f5;
  --shadow:0 4px 0 rgba(76,57,212,.18);
  --shadow-soft:0 2px 0 #e1e8f5;
}
.ss-page * { box-sizing: border-box; }
body.ss-body { font-family:'Fredoka',sans-serif; background:var(--bg); color:var(--ink); line-height:1.5; -webkit-font-smoothing:antialiased; min-height:100vh; margin:0; }

.ss-page { max-width:760px; margin:0 auto; padding:14px 18px 24px; display:flex; flex-direction:column; gap:12px; }

.ss-meta { display:flex; justify-content:space-between; align-items:center; gap:10px; font-size:.82rem; flex-wrap:wrap; }
.ss-topic { background:var(--surface); padding:6px 14px; border-radius:18px; font-weight:600; color:var(--primary); box-shadow:var(--shadow-soft); display:flex; gap:8px; align-items:center; }
.ss-topic .ss-badge { background:var(--primary); color:#fff; padding:2px 8px; border-radius:10px; font-size:.72rem; }
.ss-back { color:var(--ink-soft); text-decoration:none; font-weight:600; padding:6px 12px; border-radius:14px; }
.ss-back:hover { background:rgba(255,255,255,.6); }
.ss-timer { background:var(--surface); padding:6px 12px; border-radius:14px; font-weight:700; font-size:.82rem; color:var(--primary-deep); box-shadow:var(--shadow-soft); font-variant-numeric:tabular-nums; display:inline-flex; align-items:center; gap:4px; transition:color .2s, background .2s; }
.ss-timer.stopped { color:#15803d; background:var(--correct-soft); }

.ss-card { background:var(--surface); border-radius:18px; padding:24px 26px; box-shadow:var(--shadow); border-bottom:5px solid var(--primary); display:flex; flex-direction:column; gap:16px; }

.ss-question { font-size:1.45rem; font-weight:700; line-height:1.25; color:var(--ink); letter-spacing:-.01em; }
.ss-question strong { color:var(--primary); background:var(--primary-soft); padding:0 5px; border-radius:5px; }
.ss-sub { color:var(--ink-soft); font-size:.92rem; margin-top:-8px; }

/* Word puzzles where the pupil reads a pair like "boo [ ? ] ing" — each
   pair gets its own row so the brackets don't smush into the surrounding
   sentence. Used by bracket-letter pages. */
.ss-bracket-pairs { display:flex; flex-direction:column; gap:10px; margin:14px 0 6px; align-items:center; }
.ss-bracket-pair { font-size:1.6rem; font-weight:800; font-family:'Fredoka','Nunito',sans-serif; color:var(--ink); letter-spacing:.04em; display:inline-flex; align-items:center; gap:10px; background:#f5f3ff; padding:10px 22px; border-radius:12px; }
.ss-bracket-slot { color:#7c3aed; background:#fff; padding:2px 10px; border-radius:8px; border:2px dashed #c4b5fd; font-weight:900; }
@media (max-width: 480px) {
  .ss-bracket-pair { font-size:1.3rem; padding:8px 14px; }
}

.ss-options { display:grid; grid-template-columns:repeat(5,1fr); gap:8px; }
.ss-options.opts-4 { grid-template-columns:repeat(4,1fr); }
.ss-options.opts-3 { grid-template-columns:repeat(3,1fr); }
.ss-options.opts-2 { grid-template-columns:repeat(2,1fr); }
.ss-options.opts-stack { grid-template-columns:1fr; }
.ss-opt { display:flex; flex-direction:column; align-items:center; gap:4px; padding:14px 8px; border:2px solid var(--gray); border-radius:14px; background:var(--surface); font-family:inherit; cursor:pointer; transition:transform .12s, box-shadow .12s, border-color .12s; min-height:80px; justify-content:center; text-align:center; }
.ss-opt:hover { border-color:var(--primary); transform:translateY(-1px); box-shadow:0 4px 0 var(--gray); }
.ss-letter { font-size:.7rem; color:var(--ink-faint); font-weight:600; letter-spacing:.05em; }
.ss-num { font-size:1.5rem; font-weight:700; color:var(--ink); }
.ss-opt-stacked { padding:14px 18px !important; flex-direction:row !important; align-items:center !important; gap:14px !important; min-height:0 !important; }
.ss-opt-stacked .ss-num { font-size:1.05rem !important; }
.ss-opt.selected { border-color:var(--primary); background:var(--primary-soft); box-shadow:0 4px 0 var(--primary); }
.ss-opt.selected .ss-letter, .ss-opt.selected .ss-num { color:var(--primary-deep); }
.ss-opt.correct { border-color:var(--correct); background:var(--correct-soft); box-shadow:0 4px 0 #15803d; animation:ssPop .35s; }
.ss-opt.wrong { border-color:var(--wrong); background:var(--wrong-soft); box-shadow:0 4px 0 #b91c1c; animation:ssShake .4s; }
.ss-opt.previously-correct { border-color:var(--correct); background:var(--correct-soft); }
.ss-opt.previously-wrong { border-color:#fca5a5; background:#fef2f2; opacity:.85; }
@keyframes ssPop { 0%{transform:scale(1)} 40%{transform:scale(1.06)} 100%{transform:scale(1)} }
@keyframes ssShake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-5px)} 75%{transform:translateX(5px)} }

@media (max-width:560px) {
  /* Answer grid: collapse 5-column to 3+2 wrap, 4-column to 2x2 */
  .ss-options { grid-template-columns: repeat(3, 1fr); gap:5px; }
  .ss-options.opts-4 { grid-template-columns: repeat(2, 1fr); }
  .ss-options.opts-3 { grid-template-columns: repeat(3, 1fr); }
  .ss-options.opts-2 { grid-template-columns: repeat(2, 1fr); }
  .ss-opt { padding:10px 4px; min-height:62px; }
  .ss-num { font-size:1.1rem; }
  .ss-card { padding:14px 12px; }
  /* SVG picture panels: scroll horizontally if too wide */
  .ss-panel .visual-area { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .ss-panel svg { min-width: 0; }
  /* Session meta strip: stack on small screens */
  .ss-meta { flex-direction: column; align-items: flex-start; gap:6px; }
  .ss-page { padding: 8px 12px 20px; }
}

/* --- Variant: text/number input answer --- */
.ss-input-wrap { display:flex; gap:10px; align-items:center; padding:10px 14px; background:var(--bg); border-radius:14px; }
.ss-input-wrap .ss-input-prefix, .ss-input-wrap .ss-input-suffix { font-weight:700; color:var(--ink-soft); font-size:1.1rem; white-space:nowrap; }
.ss-input { flex:1; padding:14px 16px; border:2px solid var(--gray); border-radius:10px; font-family:inherit; font-size:1.2rem; font-weight:700; color:var(--ink); background:var(--surface); text-align:center; outline:none; transition:border-color .12s, box-shadow .12s; min-width:0; }
.ss-input:focus { border-color:var(--primary); box-shadow:0 0 0 4px var(--primary-soft); }
.ss-input.correct { border-color:var(--correct); background:var(--correct-soft); color:#15803d; }
.ss-input.wrong   { border-color:var(--wrong); background:var(--wrong-soft); color:#7f1d1d; animation:ssShake .4s; }

/* --- Variant: fraction input (whole + num/den) --- */
.ss-frac-row { display:flex; align-items:center; justify-content:center; gap:14px; padding:14px; background:var(--bg); border-radius:14px; flex-wrap:wrap; }
.ss-frac-mixed { display:flex; align-items:center; gap:8px; }
.ss-frac-mixed-label { font-weight:700; color:var(--ink-soft); font-size:.85rem; }
.ss-frac-stack { display:inline-flex; flex-direction:column; align-items:center; }
.ss-frac-stack .ss-input { width:72px; font-size:1.4rem; padding:8px 6px; }
.ss-frac-stack .ss-frac-line { width:80px; height:3px; background:var(--ink); border-radius:2px; margin:4px 0; }
.ss-frac-and { font-weight:700; color:var(--ink-soft); font-size:.95rem; padding:0 6px; }

/* --- Variant: NVR shape grid (4-up SVG buttons) --- */
.ss-options.opts-shape { grid-template-columns:repeat(4, 1fr); gap:10px; }
.ss-opt-shape { display:flex; flex-direction:column; align-items:center; gap:6px; padding:14px 8px; border:2px solid var(--gray); border-radius:14px; background:var(--surface); cursor:pointer; transition:transform .12s, box-shadow .12s, border-color .12s; min-height:110px; justify-content:center; font-family:inherit; font-weight:600; font-size:.85rem; color:var(--ink); }
.ss-opt-shape:hover { border-color:var(--primary); transform:translateY(-1px); box-shadow:0 4px 0 var(--gray); }
.ss-opt-shape.selected { border-color:var(--primary); background:var(--primary-soft); box-shadow:0 4px 0 var(--primary); }
.ss-opt-shape.correct { border-color:var(--correct); background:var(--correct-soft); box-shadow:0 4px 0 #15803d; animation:ssPop .35s; }
.ss-opt-shape.wrong { border-color:var(--wrong); background:var(--wrong-soft); box-shadow:0 4px 0 #b91c1c; animation:ssShake .4s; }
.ss-opt-shape.previously-correct { border-color:var(--correct); background:var(--correct-soft); }
.ss-opt-shape.previously-wrong { border-color:#fca5a5; background:#fef2f2; opacity:.85; }
.ss-opt-shape svg { display:block; max-width:60px; max-height:60px; }
.ss-opt-shape .ss-letter { font-size:.7rem; color:var(--ink-faint); }

@media (max-width:560px) {
  .ss-options.opts-shape { grid-template-columns:repeat(2, 1fr); }
}

/* --- Variant: multi-part (two word groups, pick one from each) --- */
.ss-multi-groups { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.ss-multi-group { background:var(--bg); padding:12px; border-radius:12px; }
.ss-multi-group-label { font-size:.78rem; font-weight:700; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em; margin-bottom:8px; }
.ss-multi-opts { display:flex; flex-direction:column; gap:6px; }
.ss-multi-opt { display:flex; align-items:center; gap:10px; padding:10px 12px; border:2px solid var(--gray); border-radius:10px; background:var(--surface); font-family:inherit; font-weight:600; font-size:.92rem; color:var(--ink); cursor:pointer; transition:all .12s; }
.ss-multi-opt:hover { border-color:var(--primary); }
.ss-multi-opt.selected { border-color:var(--primary); background:var(--primary-soft); }
.ss-multi-opt-letter { background:var(--gray); color:var(--ink-soft); width:24px; height:24px; border-radius:6px; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.72rem; flex-shrink:0; }
.ss-multi-opt.selected .ss-multi-opt-letter { background:var(--primary); color:#fff; }
.ss-multi-opt.correct { border-color:var(--correct); background:var(--correct-soft); }
.ss-multi-opt.wrong { border-color:var(--wrong); background:var(--wrong-soft); animation:ssShake .4s; }
.ss-multi-opt.previously-correct { border-color:var(--correct); background:var(--correct-soft); }
.ss-multi-opt.previously-wrong { border-color:#fca5a5; background:#fef2f2; opacity:.85; }

@media (max-width:560px) {
  .ss-multi-groups { grid-template-columns:1fr; }
}

/* --- Variant: cloze (fill-the-gap with chip choices per gap) --- */
.ss-cloze-passage { background:#fffbeb; border-left:5px solid var(--gold); border-radius:12px; padding:18px 22px; font-size:1.02rem; line-height:2.0; color:#5b4101; font-weight:500; }
.ss-cloze-passage p { margin-bottom:10px; }
.ss-cloze-blank { display:inline-block; min-width:96px; border-bottom:3px solid var(--primary); margin:0 4px; color:var(--primary); font-weight:800; text-align:center; padding:0 6px 2px; vertical-align:bottom; transition:color .2s, background .2s; }
.ss-cloze-blank.filled { color:var(--ink); border-bottom-color:var(--primary-deep); }
.ss-cloze-blank.correct-blank { color:#14532d; background:var(--correct-soft); border-bottom-color:var(--correct); border-radius:4px; }
.ss-cloze-blank.wrong-blank { color:#7f1d1d; background:var(--wrong-soft); border-bottom-color:var(--wrong); border-radius:4px; }
.ss-cloze-blank-num { font-size:.68rem; vertical-align:super; color:var(--ink-faint); font-weight:700; margin-right:2px; }
.ss-cloze-group { background:var(--bg); border-radius:12px; padding:12px 14px; margin-top:10px; }
.ss-cloze-group-label { font-size:.78rem; font-weight:700; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em; margin-bottom:8px; }
.ss-cloze-group-label .ss-cloze-num { color:var(--primary); font-weight:800; }
.ss-cloze-chips { display:flex; flex-wrap:wrap; gap:6px; }
.ss-cloze-chip { background:var(--surface); border:2px solid var(--gray); border-radius:10px; padding:7px 14px; font-family:inherit; font-weight:700; font-size:.92rem; color:var(--ink); cursor:pointer; transition:all .12s; }
.ss-cloze-chip:hover:not(.used) { border-color:var(--primary); background:var(--primary-soft); }
.ss-cloze-chip.selected { border-color:var(--primary); background:var(--primary); color:#fff; }
.ss-cloze-gap-fb { font-size:.85rem; font-weight:700; margin-top:6px; min-height:1.2em; }
.ss-cloze-gap-fb.ok { color:#15803d; }
.ss-cloze-gap-fb.wrong { color:var(--wrong); }

@media (max-width:560px) {
  .ss-cloze-blank { min-width:74px; }
  .ss-cloze-chip { padding:6px 10px; font-size:.85rem; }
}

/* --- Variant: comprehension passage --- */
.ss-passage { background:#fffbeb; border:1px solid #fde68a; border-left:5px solid var(--gold); border-radius:12px; padding:16px 18px; max-height:280px; overflow-y:auto; font-size:.95rem; line-height:1.7; color:#5b4101; }
.ss-passage h3 { color:#7c5e00; font-size:1rem; font-weight:700; margin-bottom:8px; }
.ss-passage p { margin-bottom:10px; }
.ss-sub-q { background:var(--bg); border-radius:12px; padding:14px 16px; margin-top:12px; }
.ss-sub-q-num { background:var(--primary); color:#fff; padding:2px 10px; border-radius:10px; font-size:.72rem; font-weight:700; display:inline-block; margin-bottom:6px; }
.ss-sub-q-prompt { font-weight:600; color:var(--ink); margin-bottom:10px; }

.ss-submit { background:var(--primary); color:#fff; border:none; padding:14px; border-radius:12px; font-family:inherit; font-weight:700; font-size:.98rem; cursor:pointer; width:100%; box-shadow:var(--shadow); text-transform:uppercase; letter-spacing:.05em; transition:transform .12s; }
.ss-submit:hover:not(:disabled) { transform:translateY(-1px); }
.ss-submit:active:not(:disabled) { transform:translateY(2px); box-shadow:none; }
.ss-submit:disabled { background:var(--gray); color:var(--ink-faint); cursor:not-allowed; box-shadow:none; }

.ss-feedback { display:none; padding:14px 16px; border-radius:12px; align-items:flex-start; gap:12px; font-size:.95rem; }
.ss-feedback.correct { display:flex; background:var(--correct-soft); border:2px solid var(--correct); color:#14532d; }
.ss-feedback.wrong { display:flex; background:var(--wrong-soft); border:2px solid var(--wrong); color:#7f1d1d; }
.ss-feedback-ico { font-size:1.5rem; line-height:1; }
.ss-feedback strong { display:block; margin-bottom:2px; }

.ss-state-banner { padding:12px 14px; border-radius:12px; display:flex; align-items:center; gap:12px; font-weight:600; font-size:.9rem; }
.ss-state-banner.mastered { background:#dcfce7; border:2px solid #22c55e; color:#15803d; }
.ss-state-banner.tried { background:#fef3c7; border:2px solid #f59e0b; color:#854d0e; }
.ss-state-banner .state-ico { font-size:1.5rem; }
.ss-state-banner .state-body { flex:1; line-height:1.35; }
.ss-state-banner .state-body small { display:block; font-weight:400; opacity:.85; font-size:.83rem; }
.ss-state-banner .try-again-btn { background:#22c55e; color:#fff; border:none; padding:8px 14px; border-radius:8px; font-family:inherit; font-weight:700; font-size:.85rem; cursor:pointer; white-space:nowrap; }
.ss-state-banner .try-again-btn:hover { background:#16a34a; }

.ss-help-strip { display:flex; gap:8px; flex-wrap:wrap; border-top:1px dashed var(--gray); padding-top:14px; }
.ss-help-btn { flex:1; min-width:120px; display:flex; align-items:center; justify-content:center; gap:6px; padding:10px 12px; border:2px solid var(--gray); background:var(--surface); border-radius:10px; font-family:inherit; font-weight:600; font-size:.85rem; color:var(--ink); cursor:pointer; transition:all .12s; position:relative; }
.ss-help-btn:hover:not(:disabled) { border-color:var(--hint); background:var(--hint-soft); color:#075985; }
.ss-help-btn.active { border-color:var(--primary); background:var(--primary-soft); color:var(--primary-deep); }
.ss-help-btn .ss-cost { position:absolute; top:-7px; right:-6px; background:var(--gold); color:#fff; border-radius:10px; padding:1px 7px; font-size:.65rem; font-weight:700; }
.ss-help-btn.locked { opacity:.55; cursor:not-allowed; border-style:dashed; }
.ss-help-btn.unlocked { border-color:var(--correct); background:var(--correct-soft); color:#15803d; }

.ss-panel { display:none; background:var(--hint-soft); border-left:4px solid var(--hint); padding:14px 16px; border-radius:8px; font-size:.92rem; line-height:1.6; animation:ssSlide .25s ease-out; }
.ss-panel.open { display:block; }
.ss-panel.ss-solution { background:var(--primary-soft); border-left-color:var(--primary); }
.ss-panel.ss-picture { background:#fff; border-left-color:var(--gold); padding:18px; }
@keyframes ssSlide { from{opacity:0; transform:translateY(-6px)} to{opacity:1; transform:translateY(0)} }
.ss-panel h4 { font-size:.95rem; margin-bottom:6px; color:var(--ink); }
.ss-panel ol { padding-left:20px; margin:8px 0; }
.ss-panel li { margin:4px 0; }
.ss-panel .ss-tip { margin-top:10px; padding-top:8px; border-top:1px dashed rgba(0,0,0,.1); font-size:.82rem; font-style:italic; color:var(--ink-soft); }
.ss-panel svg { max-width:100%; height:auto; display:block; }
.ss-panel .visual-area { margin: 0; }
.ss-panel .steps-box { background:rgba(255,255,255,.6); border-radius:8px; padding:10px 12px; margin-bottom:10px; }
.ss-panel .steps-box h3 { font-size:.92rem; margin-bottom:6px; color:var(--ink); }
.ss-panel .solution-step { display:flex; gap:10px; margin:8px 0; align-items:flex-start; }
.ss-panel .step-num { background:var(--primary); color:#fff; min-width:22px; height:22px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.78rem; flex-shrink:0; }
.ss-panel .step-content { flex:1; }
.ss-panel .solution-answer { background:var(--correct); color:#fff; padding:10px 14px; border-radius:10px; font-weight:700; margin-top:10px; }

.ss-hint-item { background:#fff; border-radius:8px; padding:10px 12px; margin-top:8px; display:flex; gap:10px; border-left:3px solid var(--hint); }
.ss-hint-num { background:var(--hint); color:#fff; width:20px; height:20px; border-radius:5px; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.72rem; flex-shrink:0; }

.ss-locked-toast { background:#fff6d9; color:#7c5e00; border:2px solid #f5b400; padding:10px 14px; border-radius:10px; font-weight:600; font-size:.88rem; margin-top:6px; animation:ssSlide .25s; }

.ss-reflect { display:none; background:var(--gold-soft); border-radius:10px; padding:12px 14px; }
.ss-reflect.show { display:block; }
.ss-reflect h4 { font-size:.85rem; margin-bottom:8px; color:#7c5e00; }
.ss-reflect-btn { display:block; width:100%; text-align:left; padding:9px 12px; margin-bottom:5px; border:1.5px solid #fde68a; background:#fff; border-radius:8px; font-family:inherit; font-size:.85rem; font-weight:500; color:var(--ink); cursor:pointer; }
.ss-reflect-btn:hover { border-color:var(--gold); background:var(--gold-soft); }
.ss-reflect-btn.right { background:var(--correct); color:#fff; border-color:var(--correct); }
.ss-reflect-btn.wrong { background:var(--wrong-soft); border-color:var(--wrong); color:#7f1d1d; animation:ssShake .35s; }
.ss-reflect-btn.dim { opacity:.45; }
.ss-reflect-btn:disabled { cursor:default; }
.ss-reflect-feedback { display:none; margin-top:10px; padding:10px 12px; border-radius:8px; font-size:.85rem; line-height:1.4; animation:ssSlide .25s; }
.ss-reflect-feedback.show { display:block; }
.ss-reflect-feedback.correct { background:var(--correct-soft); border-left:3px solid var(--correct); color:#14532d; }
.ss-reflect-feedback.wrong { background:var(--wrong-soft); border-left:3px solid var(--wrong); color:#7f1d1d; }

.ss-nav { display:flex; justify-content:space-between; align-items:center; margin-top:14px; padding:12px 14px; background:var(--surface); border-radius:12px; box-shadow:var(--shadow-soft); gap:10px; }
.ss-nav-btn { flex:0 0 auto; padding:9px 16px; border-radius:10px; text-decoration:none; font-weight:600; font-size:.88rem; background:var(--primary); color:#fff !important; box-shadow:var(--shadow); transition:transform .12s; max-width:42%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.ss-nav-btn:link, .ss-nav-btn:visited, .ss-nav-btn:hover, .ss-nav-btn:active, .ss-nav-btn:focus { color:#fff; }
.ss-nav-btn:hover { transform:translateY(-1px); background:var(--primary-deep); }
.ss-nav-btn.prev { background:var(--bg); color:var(--ink) !important; box-shadow:var(--shadow-soft); }
.ss-nav-btn.prev:link, .ss-nav-btn.prev:visited, .ss-nav-btn.prev:hover, .ss-nav-btn.prev:active, .ss-nav-btn.prev:focus { color:var(--ink); }
.ss-nav-btn.prev:hover { background:var(--gray); }
.ss-nav-btn.disabled { opacity:.4; pointer-events:none; }
.ss-nav-pos { flex:1; text-align:center; font-size:.85rem; color:var(--ink-soft); font-weight:600; }

/* Question stem: the visual content (shape series, pair brackets, chart, etc.)
   that the pupil reads BEFORE choosing an answer. Always visible — never
   gated behind the picture panel. */
.ss-stem { margin:6px 0 8px; padding:14px 16px; background:#f8fafc; border-radius:12px; display:flex; flex-direction:column; align-items:center; gap:8px; }
.ss-stem .visual-area, .ss-stem .series-row { width:100%; display:flex; gap:12px; justify-content:center; flex-wrap:wrap; align-items:center; }
.ss-stem .series-cell { display:flex; flex-direction:column; align-items:center; gap:4px; }
.ss-stem .series-arrow { font-size:1.4rem; color:#7c3aed; font-weight:900; display:flex; align-items:center; }
@media (max-width:480px){ .ss-stem { padding:10px 8px; } }

/* Stem-internal classes lifted from the original per-page <style> blocks so the
   recovered visual stems render correctly inside .ss-stem. */
.ss-stem .series-cell { background:#f5f0ff; border-radius:10px; border:2px solid #d1c4e9; width:80px; height:80px; padding:6px; }
.ss-stem .series-cell.missing { background:#fff9e6; border:2px dashed #f59e0b; }
.ss-stem .series-arrow { color:#9ca3af; }
.ss-stem .analogy-row { display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:center; }
.ss-stem .analogy-sep { font-size:1.4rem; color:#9ca3af; font-weight:900; }
.ss-stem .analogy-label { font-weight:800; color:#5b21b6; font-size:0.85rem; margin-top:4px; }
.ss-stem .example-box { display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:center; background:#f5f0ff; border:2px solid #d1c4e9; border-radius:12px; padding:12px 16px; }
.ss-stem .example-label { font-size:0.82rem; color:#5b21b6; font-weight:700; margin-top:4px; }
.ss-stem .code-table { border-collapse:separate; border-spacing:8px; margin:0 auto; }
.ss-stem .code-table td { background:#f5f0ff; border:2px solid #d1c4e9; border-radius:10px; padding:6px; text-align:center; min-width:60px; }
.ss-stem .code-table .code-row td { font-weight:900; color:#4c1d95; font-size:1.1rem; }
.ss-stem .mystery-box { display:flex; align-items:center; justify-content:center; gap:12px; background:#fff9e6; border:2px dashed #f59e0b; border-radius:12px; padding:10px 14px; margin-top:12px; }