/* 第2の見た目「パステル」。original に戻すと、このテーマの指定はすべて外れる。
   KaTeX/ruby、表示条件、ドラッグ位置、出題処理には手を入れない。 */
.pop-look-switch { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 8px; margin: -10px 0 15px; }
#pop-look-name { font-size: 12px; white-space: nowrap; }
#pop-look-toggle {
  padding: 7px 14px; min-height: 34px; border-radius: 999px; border: 1px solid #a6a0c6;
  background: #ffffff12; color: #e7e5f2; font: inherit; font-size: 12px; cursor: pointer;
}
#pop-look-toggle:focus-visible { outline: 3px solid #5de8ff; outline-offset: 3px; }

html[data-iroiro-pop="pop"] {
  --pop-ink: #583179; --pop-pink: #eb398c; --pop-purple: #7f44db;
  --pop-yellow: #ffe773; --pop-white: #fffaff; color-scheme: light;
}
html[data-iroiro-pop="pop"] body {
  position: relative; isolation: isolate; color: var(--pop-ink);
  font-family: 'Hiragino Maru Gothic ProN', 'Arial Rounded MT Bold', 'Yu Gothic', sans-serif;
  background-color: #f4deff;
  background-image: radial-gradient(ellipse at 3% 4%, #ffcce5 0, transparent 47%),
    radial-gradient(ellipse at 100% 28%, #b9f3ff 0, transparent 50%),
    radial-gradient(ellipse at 5% 80%, #e4ceff 0, transparent 45%),
    linear-gradient(180deg, #fff0f9, #dce7ff 60%, #fce5f5);
  background-size: auto;
}
html[data-iroiro-pop="pop"] .pop-app { position: relative; z-index: 1; }
html[data-iroiro-pop="pop"] h1 {
  position: relative; color: #aa35c1; background: none; -webkit-text-fill-color: currentColor;
  -webkit-text-stroke: 4px #fff; paint-order: stroke fill;
  text-shadow: 0 4px 0 #d4b1e7, 0 7px 18px #b064c526; filter: none;
  font-size: clamp(26px, 4.6vw, 38px); letter-spacing: .025em; line-height: 1.55;
  margin: 0 auto 8px; width: fit-content; max-width: 100%;
}
html[data-iroiro-pop="pop"] .h1-prefix {
  color: #8755a0; -webkit-text-stroke: 0; text-shadow: none;
  font-size: 14px; letter-spacing: .07em; margin: 0 0 7px;
}
html[data-iroiro-pop="pop"] .subtitle { color: #79598f; opacity: 1; line-height: 1.9; margin-bottom: 20px; }
html[data-iroiro-pop="pop"] #pop-look-toggle {
  color: #765385; background: #ffffffb3; border: 1px dashed #b789cd; box-shadow: none;
}
html[data-iroiro-pop="pop"] #pop-look-toggle:hover { background: #fff; }
html[data-iroiro-pop="pop"] .usage-wrap .home-btn,
html[data-iroiro-pop="pop"] .usage-wrap #sfx-toggle,
html[data-iroiro-pop="pop"] .usage-wrap #ruby-toggle {
  background: #fff4fd !important; border-color: #c89fdf !important; color: #794492 !important;
  box-shadow: 0 3px 0 #d5b5e6;
}
html[data-iroiro-pop="pop"] .grade-row { gap: 9px; margin-bottom: 18px; }
html[data-iroiro-pop="pop"] .grade-btn {
  border: 2px solid #fff; background: #fff9ff; border-radius: 16px;
  color: #835998; min-height: 42px; box-shadow: 0 4px 0 #d5b6e7;
  padding: 9px 20px; transition: background-color .18s, box-shadow .18s;
}
html[data-iroiro-pop="pop"] .grade-btn.active {
  background: #ffe775; color: #674114; border-color: #fff;
  box-shadow: 0 4px 0 #e9b647, 0 0 0 2px #f6bd47;
}
html[data-iroiro-pop="pop"] .mode-grid { gap: 13px; margin-bottom: 16px; }
html[data-iroiro-pop="pop"] .mode-btn {
  --candy-top: #f8efff; --candy-bottom: #f1e2ff; --candy-shadow: #d5a6d4;
  position: relative; color: #583179; background: linear-gradient(180deg, var(--candy-top), var(--candy-bottom));
  border: 2px solid #fff; border-radius: 21px; min-height: 66px; padding: 15px 9px;
  box-shadow: 0 5px 0 var(--candy-shadow), 0 8px 14px #9155ab1f, inset 0 3px 0 #ffffff55;
  text-shadow: none; filter: none; line-height: 1.55;
  transition: filter .15s, transform .15s;
}
html[data-iroiro-pop="pop"] .mode-btn-1 { --candy-top: #fff7e9; --candy-bottom: #ffeace; --candy-shadow: #d5a6d4; color: #865017; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn-2 { --candy-top: #f8efff; --candy-bottom: #f1e2ff; --candy-shadow: #d5a6d4; color: #583179; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn-3 { --candy-top: #fff0f7; --candy-bottom: #ffe2ed; --candy-shadow: #d5a6d4; color: #98436b; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn-4 { --candy-top: #dcf7ff; --candy-bottom: #c6f0ff; --candy-shadow: #d5a6d4; color: #316781; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn-6 { --candy-top: #e9fbf1; --candy-bottom: #dcf8e9; --candy-shadow: #d5a6d4; color: #195d40; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn-7 { --candy-top: #e7f3ff; --candy-bottom: #d7eaff; --candy-shadow: #d5a6d4; color: #345a7e; text-shadow: none; }
html[data-iroiro-pop="pop"] .mode-btn:hover { filter: brightness(1.07); transform: translateY(-2px); }
html[data-iroiro-pop="pop"] .mode-btn ruby.oj-rb rt { opacity: 1; }
html[data-iroiro-pop="pop"] .mode-btn.active {
  filter: none; box-shadow: 0 5px 0 var(--candy-shadow), 0 0 0 3px #ffce63, inset 0 3px 0 #ffffff66;
}
html[data-iroiro-pop="pop"] .mode-btn-5 {
  background: linear-gradient(180deg, #fff0ac, #ffe68a); color: #714717;
  text-shadow: none; --candy-shadow: #d5a6d4;
}
html[data-iroiro-pop="pop"] .shape-nav-prev { color: #855ba1 !important; }
html[data-iroiro-pop="pop"] .shape-nav-prev .nav-shape path { fill: #fff7ff; stroke: #cda3e3; stroke-width: 2; }
html[data-iroiro-pop="pop"] .shape-nav-current {
  color: #84589f !important; background: #fff7ff !important; border: 2px solid #cda3e3 !important;
  border-radius: 16px !important; box-shadow: 0 3px 0 #d6b7e5 !important;
}
html[data-iroiro-pop="pop"] .shape-nav-next .nav-shape path { fill: #ffcf63; stroke: white; stroke-width: 2; filter: drop-shadow(0 3px 0 #d39a36); }
html[data-iroiro-pop="pop"] .shape-nav-next { color: #704223 !important; }
html[data-iroiro-pop="pop"] .question-box {
  /* 下の操作枠に影を隠されないよう、問題枠を手前に描く。 */
  z-index: 1;
  /* 枠を密着させるJS指定より優先し、6pxの影の下にも少し背景を見せる。 */
  margin-bottom: 12px !important;
  border: 3px solid #fff; border-radius: 28px; color: var(--pop-ink);
  padding-top: 62px;
  background: linear-gradient(145deg, #fff, #fff4fb);
  box-shadow: 0 6px 0 #b399d2, 0 10px 25px #75559b20;
}
html[data-iroiro-pop="pop"] .q-text { color: var(--pop-ink); }
html[data-iroiro-pop="pop"] .q-note,
html[data-iroiro-pop="pop"] .calc-note,
html[data-iroiro-pop="pop"] .calc-note-sub { color: #795484; }
html[data-iroiro-pop="pop"] .q-hint,
html[data-iroiro-pop="pop"] .choice-wrong-hint,
html[data-iroiro-pop="pop"] #step-results { color: #865017; }
html[data-iroiro-pop="pop"] .calc-note [style*="color"] { color: var(--pop-ink) !important; }
html[data-iroiro-pop="pop"] .calc-note > [style*="color"] { color: #865017 !important; }
html[data-iroiro-pop="pop"] .hint-text { color: #865017 !important; }
/* 正誤の意味は保ち、明るい面でも読める緑・赤に合わせる。 */
html[data-iroiro-pop="pop"] .hint-text:is([style*="#6ee7b7"], [style*="110, 231, 183"]) { color: #17683f !important; }
html[data-iroiro-pop="pop"] .hint-text:is([style*="#fca5a5"], [style*="252, 165, 165"]) { color: #a83056 !important; }
html[data-iroiro-pop="pop"] .hint-text [style*="color"] { color: #865017 !important; }
/* 図の属性を変えず、時計・並び・表をパステルの明るい配色にする。 */
html[data-iroiro-pop="pop"] #figure [stroke="#e2e8f0"] { stroke: #74538e; }
html[data-iroiro-pop="pop"] #figure [fill="#e2e8f0"],
html[data-iroiro-pop="pop"] #figure text[fill="#fff"] { fill: var(--pop-ink); }
html[data-iroiro-pop="pop"] #figure [stroke="#fbbf24"] { stroke: #c9720d; }
html[data-iroiro-pop="pop"] #figure [fill="#fbbf24"],
html[data-iroiro-pop="pop"] #figure [fill="#fb923c"] { fill: #a65410; }
html[data-iroiro-pop="pop"] #figure [stroke="#fb923c"] { stroke: #a65410; }
html[data-iroiro-pop="pop"] #figure [fill="rgba(168,85,247,0.10)"],
html[data-iroiro-pop="pop"] #figure [fill="rgba(255,255,255,0.04)"] { fill: #fff; }
html[data-iroiro-pop="pop"] #figure [fill="rgba(168,85,247,0.14)"] { fill: #f2e5ff; }
html[data-iroiro-pop="pop"] #figure [fill="rgba(168,85,247,0.22)"] { fill: #e6d3fa; }
html[data-iroiro-pop="pop"] #figure [fill="rgba(251,146,60,0.55)"] { fill: #ffdcad; }
html[data-iroiro-pop="pop"] #figure [fill="rgba(251,146,60,0.30)"] { fill: #fff0d8; }
html[data-iroiro-pop="pop"] .mode-chip {
  background: #ffe68a; border: 2px solid #fff; color: #734127;
  border-radius: 12px; padding: 5px 12px; box-shadow: 0 2px 0 #bf8647;
}
html[data-iroiro-pop="pop"] .answer-btn {
  background: #ffe68a; border: 2px solid #fff; color: #714717; border-radius: 12px;
  box-shadow: 0 3px 0 #b89545;
}
html[data-iroiro-pop="pop"] .answer-input-btn,
html[data-iroiro-pop="pop"] .tool-btn {
  background: #d2f6ff; border: 2px solid #fff; color: #275c7e; border-radius: 12px;
  box-shadow: 0 3px 0 #86b8d3;
}
html[data-iroiro-pop="pop"] :is(.answer-input-btn, .tool-btn):active:not(:disabled) {
  transform: translateY(2px); box-shadow: 0 1px 0 #86b8d3;
}
html[data-iroiro-pop="pop"] :is(.answer-input-btn, .tool-btn):disabled { box-shadow: none; }
html[data-iroiro-pop="pop"] .answer-input-btn:hover,
html[data-iroiro-pop="pop"] .answer-input-btn.active,
html[data-iroiro-pop="pop"] .tool-btn:hover,
html[data-iroiro-pop="pop"] .tool-btn.active { color: #fff; background: #326c91; }
html[data-iroiro-pop="pop"] .answer-btn:hover { background: #ffdb65; }
html[data-iroiro-pop="pop"] .answer-display { color: #80501a; background: #fff7d9; border-color: #c39a42; border-radius: 14px; }
html[data-iroiro-pop="pop"] .answer-box {
  background: linear-gradient(145deg, #fff2fb, #f5eeff); color: var(--pop-ink);
  padding-top: 60px;
  border: 3px solid #fff; border-radius: 28px; box-shadow: 0 7px 0 #b399d2, 0 12px 22px #75559b24;
}
html[data-iroiro-pop="pop"] .restart-btn { border: 1px solid #aa87c8; background: #fffaff; border-radius: 11px; color: var(--pop-ink); }
html[data-iroiro-pop="pop"] .restart-btn:hover:not(:disabled) { background: #ecdafa; }
html[data-iroiro-pop="pop"] .restart-btn:disabled { opacity: .3; box-shadow: none; }
html[data-iroiro-pop="pop"] .choice-title { color: var(--pop-ink); }
html[data-iroiro-pop="pop"] .choice-btn {
  border: 2px solid #c8a7df; border-radius: 20px; background: linear-gradient(180deg, #fff, #faf2ff); color: var(--pop-ink);
  box-shadow: 0 4px 0 #c4a4d8, inset 0 2px #fff;
}
html[data-iroiro-pop="pop"] .choice-btn:hover:not(:disabled) { background: #f4ddf5; border-color: #a876c1; }
html[data-iroiro-pop="pop"] .choice-btn.correct { color: #195d40; background: #dcf8e9; border-color: #4b9b75; }
html[data-iroiro-pop="pop"] .choice-btn.wrong { color: #a83056; background: #ffe2ed; border-color: #cc668a; }
html[data-iroiro-pop="pop"] .calc-pad {
  background: linear-gradient(150deg, #fff2fb, #f5ddff 75%); border: 3px solid #fff;
  border-radius: 27px; box-shadow: 0 7px 0 #b68bcb, 0 13px 22px #27154c4d;
  padding: 10px 12px 17px;
}
html[data-iroiro-pop="pop"] .calc-grip { background: #e7c5ee; color: #9268a6; border-color: #d6abe3; border-radius: 999px; width: 70px; }
html[data-iroiro-pop="pop"] .num-display,
html[data-iroiro-pop="pop"] .direct-display {
  background: #fffcf1; color: var(--pop-ink); border: 2px solid #b996cc; border-radius: 16px;
  box-shadow: inset 0 3px 0 #ede0f2;
}
html[data-iroiro-pop="pop"] .num-unit,
html[data-iroiro-pop="pop"] .direct-unit,
html[data-iroiro-pop="pop"] .oj-tlab { color: #795484; }
html[data-iroiro-pop="pop"] .oj-tbox { border-color: #c5abe3; }
html[data-iroiro-pop="pop"] .oj-tbox.active { border-color: #b78932; background: #ffecac; box-shadow: 0 0 0 2px #edd19666; }
html[data-iroiro-pop="pop"] .num-reject { color: #a83056; }
html[data-iroiro-pop="pop"] .num-display.correct,
html[data-iroiro-pop="pop"] .direct-display.correct { color: #195d40; background: #dcf8e9; border-color: #4b9b75; }
html[data-iroiro-pop="pop"] .num-display.wrong,
html[data-iroiro-pop="pop"] .direct-display.wrong { color: #a83056; background: #ffe2ed; border-color: #cc668a; }
html[data-iroiro-pop="pop"] .num-btn {
  background: linear-gradient(#fff, #fff0f8); color: #844391; border: 2px solid #fff;
  border-radius: 16px; box-shadow: 0 4px 0 #d5a6d4, 0 5px 5px #9c62a41a;
}
html[data-iroiro-pop="pop"] .num-btn:hover:not(:disabled) { background: #ffe0f0; color: #733582; }
html[data-iroiro-pop="pop"] .num-btn:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 1px 0 #d5a6d4; }
html[data-iroiro-pop="pop"] .num-btn.op-btn { background: #c6f0ff; color: #316781; border-color: #effbff; box-shadow: 0 4px 0 #86b8d3; }
html[data-iroiro-pop="pop"] .num-btn.clr-btn { background: #ffd1e2; color: #98436b; border-color: #fff0f6; }
html[data-iroiro-pop="pop"] .oj-explain { color: var(--pop-ink); background: #fffaf0; border-color: #d4b365; border-radius: 22px; }
html[data-iroiro-pop="pop"] .oj-explain .ai-steps,
html[data-iroiro-pop="pop"] .oj-explain .ai-line .katex { color: var(--pop-ink); }
html[data-iroiro-pop="pop"] .oj-explain .ai-reason { color: #865017; }
html[data-iroiro-pop="pop"] .ai-explain-btn,
html[data-iroiro-pop="pop"] .oj-explain .oj-explain-x { color: #74458d; background: #f1e2ff; border-color: #b896cb; border-radius: 12px; }
html[data-iroiro-pop="pop"] .ai-explain-btn:hover,
html[data-iroiro-pop="pop"] .oj-explain .oj-explain-x:hover { color: var(--pop-ink); background: #e6cef7; }
html[data-iroiro-pop="pop"] .oj-explain .oj-alt-btn { color: #74458d !important; background: #f1e2ff !important; border-color: #b896cb !important; }
/* 手書きは黒・赤で表示し、描画と履歴のデータは保つ。 */
html[data-iroiro-pop="pop"] body > canvas[style*="z-index: 9998"] { filter: var(--oj-light-ink-filter); }
html[data-iroiro-pop="pop"] .solved-overlay,
html[data-iroiro-pop="pop"] .challenge-intro-overlay,
html[data-iroiro-pop="pop"] .kiroku-overlay { background: #291345b8 !important; backdrop-filter: blur(6px); }
html[data-iroiro-pop="pop"] .solved-card,
html[data-iroiro-pop="pop"] .challenge-intro-overlay > div,
html[data-iroiro-pop="pop"] .kiroku-overlay > div {
  border: 5px solid transparent !important; border-radius: 30px !important;
  background: radial-gradient(ellipse at 50% 0, #9856bb, #503581 75%) padding-box,
    linear-gradient(130deg, #ffe895, #ffb7d8, #c4baff, #a8f1f1, #ffe895) border-box !important;
  box-shadow: 0 8px 0 #311b58, 0 24px 60px #1b0c494d, 0 0 32px #ecbcff66 !important;
}
html[data-iroiro-pop="pop"] .solved-emoji { font-size: 3.5em; }
html[data-iroiro-pop="pop"] .solved-label { color: #ffe99a; font-weight: 900; font-size: 1.25em; }
html[data-iroiro-pop="pop"] .solved-ans { color: #fff2c7; text-shadow: 0 3px #6b3695; }
html[data-iroiro-pop="pop"] .solved-btn { border: 2px solid #d8baef; border-radius: 16px; background: #77529d; box-shadow: 0 4px 0 #3d2666; }
html[data-iroiro-pop="pop"] .solved-btn-primary,
html[data-iroiro-pop="pop"] .challenge-intro-start {
  background: linear-gradient(#ffe88d, #ffc763) !important; color: #6c3c23 !important;
  border: 2px solid #fff3ca !important; border-radius: 16px !important;
  box-shadow: 0 4px 0 #c0883c !important;
}
html[data-iroiro-pop="pop"] .solved-hint { color: #e6cdec; }
html[data-iroiro-pop="pop"] .challenge-bar { background: #8551b6; border: 2px solid #fff; color: #ffe893; box-shadow: 0 4px #b393d3; }
html[data-iroiro-pop="pop"] .challenge-giveup-btn { background: #fff6ff; color: #7c4a9b; border: 2px solid #fff; box-shadow: 0 3px #c5a0d9; }
html[data-iroiro-pop="pop"] .oj-kaisetsu-wrap,
html[data-iroiro-pop="pop"] .app-about {
  background: #fff7ffeb; border: 2px solid #fff; border-radius: 22px;
  color: #705382; box-shadow: 0 4px 0 #d8c0e8; position: relative;
}
html[data-iroiro-pop="pop"] .oj-kaisetsu-sum { color: #8a3c9f; padding: 15px 18px; }
html[data-iroiro-pop="pop"] .oj-kaisetsu-sum::before { color: #e36ca3; }
html[data-iroiro-pop="pop"] .oj-kaisetsu { color: #705382; }
html[data-iroiro-pop="pop"] .oj-kaisetsu h3 { color: #6e3f8e; border-left-color: #ed8cc3; }
html[data-iroiro-pop="pop"] .oj-q { color: #754790; background: #f0e0fc; }
html[data-iroiro-pop="pop"] .oj-a { color: #a5447d; }
html[data-iroiro-pop="pop"] .oj-caution { color: #ad345c; }
html[data-iroiro-pop="pop"] .app-about h2 { color: #8a3c9f; }
html[data-iroiro-pop="pop"] .related-app-btn { background: #fff8ff; color: #865197; border: 2px solid #fff; border-radius: 16px; box-shadow: 0 4px #c4aedc; }
html[data-iroiro-pop="pop"] .lock-dialog { background: linear-gradient(150deg, #735099, #463069); border: 3px solid #ead4ff; border-radius: 26px; }
html[data-iroiro-pop="pop"] .bug-report-btn { background: #fff4fd !important; border-color: #cba9db !important; color: #896399 !important; }
html[data-iroiro-pop="pop"] footer,
html[data-iroiro-pop="pop"] footer a { color: #795a8f !important; }
html[data-iroiro-pop="pop"] button:focus-visible,
html[data-iroiro-pop="pop"] a:focus-visible,
html[data-iroiro-pop="pop"] summary:focus-visible { outline: 3px solid #aa307f; outline-offset: 4px; }

@media (max-width: 600px) {
  html[data-iroiro-pop="pop"] h1 { font-size: clamp(21px, 5.5vw, 30px); -webkit-text-stroke-width: 3px; }
  html[data-iroiro-pop="pop"] .h1-prefix { display: block !important; font-size: 12px; margin: 5px 0; }
  html[data-iroiro-pop="pop"] .subtitle { margin-bottom: 17px; }
  html[data-iroiro-pop="pop"] .pop-look-switch { margin: -6px 0 14px; }
  html[data-iroiro-pop="pop"] .grade-row { gap: 7px; }
  html[data-iroiro-pop="pop"] .grade-btn { flex: 1; min-width: 0; padding: 7px 4px; border-radius: 13px; }
  html[data-iroiro-pop="pop"] .mode-btn { padding-inline: 6px; font-size: clamp(.78rem, 3.35vw, .95rem); }
  html[data-iroiro-pop="pop"] .mode-grid > #mode-challenge { grid-column: 1 / -1; }
  html[data-iroiro-pop="pop"] .nav-row { flex-wrap: nowrap; gap: 7px; }
  html[data-iroiro-pop="pop"] .shape-nav-btn {
    flex: 1; width: auto !important; min-width: 0 !important;
    font-size: .76em !important; padding: 8px 6px !important;
  }
  html[data-iroiro-pop="pop"] body.sp-ui .sp-mode-bar { padding: 6px 4px 12px; gap: 12px; }
  html[data-iroiro-pop="pop"] body.sp-ui .sp-mode-bar .mode-btn { border-radius: 19px !important; border-width: 2px; }
  html[data-iroiro-pop="pop"] .question-box, html[data-iroiro-pop="pop"] .answer-box { border-radius: 23px; }
  html[data-iroiro-pop="pop"] body.sp-ui .question-box { padding-top: 62px; }
  html[data-iroiro-pop="pop"] .q-text { padding-inline: 4px; }
  html[data-iroiro-pop="pop"] .q-text .q-text-line { max-width: 100%; white-space: normal; overflow-wrap: anywhere; }
  html[data-iroiro-pop="pop"] .oj-explain .oj-prose-line { white-space: normal; overflow-wrap: anywhere; }
  html[data-iroiro-pop="pop"] .choices { grid-template-columns: minmax(0, 1fr); }
  html[data-iroiro-pop="pop"] .calc-pad { max-width: 290px; }
  html[data-iroiro-pop="pop"] .num-display,
  html[data-iroiro-pop="pop"] .direct-display { padding-inline: 8px; }
  html[data-iroiro-pop="pop"] .choice-btn { border-radius: 17px; }
  html[data-iroiro-pop="pop"] .solved-card { padding: 28px 18px; }
}
@media (max-width: 360px) {
  html[data-iroiro-pop="pop"] .grade-row { gap: 4px; }
  html[data-iroiro-pop="pop"] .grade-btn { padding-inline: 1px; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  html[data-iroiro-pop="pop"] .mode-btn { transition: none; }
}

/* 色の丸も実際の線と同じ黒・赤。黒が見えるようボタンの内側は白にする。 */
html:is([data-iroiro-pop="game"], [data-iroiro-pop="pop"], [data-iroiro-pop="simple"]) button[aria-label="手書き色を切り替え"] {
  background: #fff !important; border-color: #a6a0b2 !important; box-shadow: none !important;
}
html:is([data-iroiro-pop="game"], [data-iroiro-pop="pop"], [data-iroiro-pop="simple"]) button[aria-label="手書き色を切り替え"] > span { filter: var(--oj-light-ink-filter); }

/* 5問チャレンジは、暗いインライン配色を明るいキャンディ調へ置き換える。 */
html[data-iroiro-pop="pop"] .challenge-intro-overlay > div {
  color: var(--pop-ink) !important;
  background: linear-gradient(155deg, #fffaff, #f5e9ff 58%, #ffeaf5) !important;
  border: 4px solid #fff !important; border-radius: 28px !important;
  box-shadow: 0 6px 0 #bca3d2, 0 22px 60px #2913454d !important;
}
html[data-iroiro-pop="pop"] .challenge-intro-overlay > div > div:first-child {
  color: #8a3c9f !important; letter-spacing: .025em; text-shadow: 0 2px 0 #fff;
}
html[data-iroiro-pop="pop"] .challenge-intro-overlay > div > div:nth-child(2) { color: #6f507f !important; }
html[data-iroiro-pop="pop"] .challenge-intro-overlay > div > div:nth-child(3) { color: #9b427c !important; }
html[data-iroiro-pop="pop"] .challenge-intro-grid { gap: 10px !important; margin-top: 11px !important; }
html[data-iroiro-pop="pop"] .challenge-intro-kind {
  color: #432b53 !important;
  background-image: linear-gradient(180deg, #ffffff73, #ffffff26) !important;
  border: 2px solid #fff !important; border-radius: 16px !important;
  box-shadow: 0 4px 0 #b28bc9, inset 0 2px #ffffff8c !important;
  text-shadow: 0 1px #fff9;
}
html[data-iroiro-pop="pop"] .challenge-intro-start {
  color: #6c3c23 !important; background: linear-gradient(#ffe88d, #ffc763) !important;
  border: 2px solid #fff3ca !important; border-radius: 16px !important;
  box-shadow: 0 4px 0 #c0883c, inset 0 2px #fff8 !important;
  text-shadow: 0 1px #fff8;
}
html[data-iroiro-pop="pop"] .challenge-intro-kiroku {
  color: #6e3f8e !important; background: #ead9f8 !important;
  border: 2px solid #b896cb !important; border-radius: 14px !important;
  box-shadow: 0 3px 0 #c4a4d8 !important;
}
html[data-iroiro-pop="pop"] .challenge-intro-no {
  color: #795484 !important; background: #fffaff !important;
  border: 2px solid #c8a7df !important; border-radius: 14px !important;
  box-shadow: 0 3px 0 #d5b6e7 !important;
}
html[data-iroiro-pop="pop"] :is(.challenge-intro-kind, .challenge-intro-start, .challenge-intro-kiroku, .challenge-intro-no):hover {
  filter: brightness(1.04);
}
/* 比の図（2：1＝x：5）は svg に color:#fff の直書き。明るい紙では字色に（2026-09-25） */
html[data-iroiro-pop="pop"] #direct-fig .oj-eqfig { color: var(--pop-ink) !important; }
/* 比の図の「×？」など、svg の中の黄色い字は明るい紙で読めないので、文字 x と同じ濃い橙に（2026-09-25） */
html[data-iroiro-pop="pop"] svg text[fill="#fbbf24"] { fill: #a65410; }

/* パステル：手書き（えんぴつ）の入口と道具の帯を、暗い紺の丸から明るい面にする（2026-10-12 本人「直す」。シンプルと同じ形）。
   書いているあいだのえんぴつは、薄い黄色で「書ける」状態が分かるようにする。線の色は上の oj-light-ink がもう受けもっている */
html[data-iroiro-pop="pop"] .sp-hw-tray {
  background: var(--pop-white); border-color: #d8c5ee; box-shadow: 0 3px 12px #7f44db22;
}
html[data-iroiro-pop="pop"] :is(.sp-hw-main, .sp-hw-tool) {
  color: var(--pop-ink) !important; background: #fff !important;
  border-color: #d8c5ee !important; box-shadow: none !important;
}
html[data-iroiro-pop="pop"] body.sp-hw-on .sp-hw-main { background: #fff2b3 !important; border-color: var(--pop-purple) !important; }
html[data-iroiro-pop="pop"] .sp-hw-clear::before { filter: brightness(0); opacity: .65; }
/* OJ-TITLE-RING-START 見出し（◯◯マスター）の白いふちは、ふち取り（-webkit-text-stroke）でなく白い影を8方向に重ねて描く（2026-10-15）。
   ⚠️ 学校の電子黒板など古めのブラウザは「ふちを先に描いて字を上に重ねる」（paint-order: stroke fill）を文字に使えず、
      白いふちが字の上に乗って字の内側を削り、字が細く見えていた（本人が電子黒板で確かめて「なおった」）。影なら、どのブラウザでも字の外側にだけ付く。
   ⚠️ ファイルの最後に置く（上の @media の -webkit-text-stroke-width より後ろにしないと、ふち取りがもどる）。ふちの太さは、もとのふち取りの外側の半分。 */
html[data-iroiro-pop="pop"] h1 { -webkit-text-stroke: 0; paint-order: normal; text-shadow: 2px 0 0 #fff, -2px 0 0 #fff, 0 2px 0 #fff, 0 -2px 0 #fff, 1.41px 1.41px 0 #fff, -1.41px 1.41px 0 #fff, 1.41px -1.41px 0 #fff, -1.41px -1.41px 0 #fff, 0 4px 0 #d4b1e7, 0 7px 18px #b064c526; }
html[data-iroiro-pop="pop"] .h1-prefix { text-shadow: none; }
@media (max-width: 600px) {
  html[data-iroiro-pop="pop"] h1 { text-shadow: 1.5px 0 0 #fff, -1.5px 0 0 #fff, 0 1.5px 0 #fff, 0 -1.5px 0 #fff, 1.06px 1.06px 0 #fff, -1.06px 1.06px 0 #fff, 1.06px -1.06px 0 #fff, -1.06px -1.06px 0 #fff, 0 4px 0 #d4b1e7, 0 7px 18px #b064c526; }
}
/* OJ-TITLE-RING-END */