/* 豆豆 · 衔接诊断「课本竖式」作答样式 v1（与新课复习课本版作答区同一套 .dtb-* 样式） */
/* =====================================================================
 * 13. 课本竖式格子（配合 division-textbook-ui.js）
 *     每一位数字占一格，和被除数的数位上下对齐；原来的输入框藏起来，只负责保存。
 * ===================================================================== */
.dtb-pad {
  --dtb-cell: 42px;
  --dtb-row: 50px;
  --dtb-font: 34px;
  --dtb-ink: var(--dv-ink, #24332c);
  --dtb-green: var(--dv-green, #2f8f5b);
  --dtb-red: var(--dv-red, #cf3f2c);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 8px auto 4px;
  max-width: 100%;
  color: var(--dtb-ink, #24332c);
}
.dtb-host { display: none !important; }
.dtb-pad[hidden] { display: none; }


.dtb-tip {
  margin: 0;
  padding: 8px 14px;
  border-radius: 12px;
  background: #fff6dc;
  color: #7a5a12;
  font: 500 15px/1.5 var(--dv-sans, system-ui, sans-serif);
  text-align: center;
}
.dtb-tip.done { background: var(--dv-green-soft, #e8f5ed); color: #23704a; }

.dtb-sheet {
  display: grid;
  grid-auto-rows: var(--dtb-row);
  align-items: center;
  justify-items: center;
  font: 500 var(--dtb-font)/1 var(--dv-mono, ui-monospace, Menlo, monospace);
  font-variant-numeric: tabular-nums;
  max-width: 100%;
  overflow-x: auto;
  padding: 2px 2px 6px;
}
/* 画横线的那一行只要一点点高 */
.dtb-sheet > .dtb-rule { align-self: center; justify-self: stretch; height: 2.5px; border-radius: 2px; background: var(--dtb-ink, #24332c); }

/* 除数、厂、被除数 */
.dtb-divisor { position: relative; display: inline-flex; justify-self: end; padding: 0 2px 0 6px; }
span.dtb-num { position: relative; display: inline-flex; align-items: center; justify-content: center; width: var(--dtb-cell); height: var(--dtb-row); }
span.dtb-num.child { color: #2e6fb0; }
span.dtb-num.blank { pointer-events: auto; }
.dtb-curve { justify-self: stretch; align-self: stretch; }
.dtb-curve svg { display: block; width: 100%; height: 100%; overflow: visible; }
.dtb-curve path { fill: none; stroke: var(--dtb-ink, #24332c); stroke-width: 2.5; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.dtb-sheet > .dtb-topline { align-self: start; justify-self: stretch; height: 0; border-top: 2.5px solid var(--dtb-ink, #24332c); margin-left: 5px; }

/* 小数点：写在两位数字之间、靠下 */
.dtb-dot {
  position: absolute;
  right: -4px;
  bottom: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--dtb-ink, #24332c);
  pointer-events: none;
}
/* 划掉的旧小数点 */
.dtb-dot.old { background: #9aa7a0; }
.dtb-dot.old::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 2px;
  width: 15px;
  height: 2px;
  background: var(--dtb-red, #cf3f2c);
  transform: rotate(-55deg);
}
/* 商的小数点（可点掉） */
.dtb-sheet > .dtb-dot.as-button {
  position: relative;
  right: auto;
  bottom: auto;
  justify-self: end;
  align-self: end;
  margin: 0 -8px 10px 0;
  padding: 0;
  border: 0;
  width: 9px;
  height: 9px;
  z-index: 2;
  pointer-events: auto;
  cursor: pointer;
  box-shadow: 0 0 0 5px transparent;
}
.dtb-sheet > .dtb-dot.as-button.lead { justify-self: start; margin: 0 0 10px -8px; }
.dtb-sheet > .dtb-dot.as-button:disabled { cursor: default; }

/* 移动小数点的弧线 */
.dtb-arc {
  position: absolute;
  bottom: 2px;
  height: 9px;
  border: 2px solid var(--dtb-red, #cf3f2c);
  border-top: 0;
  border-radius: 0 0 12px 12px;
  pointer-events: none;
  box-sizing: border-box;
}
.dtb-divisor > .dtb-arc { margin-left: 6px; }
.dtb-sheet > .dtb-arc.in-grid { position: relative; align-self: end; justify-self: stretch; margin: 0 calc(var(--dtb-cell) / -2) 2px calc(var(--dtb-cell) / 2); }

/* 点小数点位置的透明按钮：盖在两个数字中间 */
.dtb-gap {
  position: absolute;
  top: 0;
  left: 50%;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  z-index: 1;
}
.dtb-gap:hover, .dtb-gap:focus-visible { background: rgba(47, 143, 91, .10); outline: none; }

/* 写数字的格子：没写时是浅浅的虚线格，写上后就像印在本子上 */
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell {
  box-sizing: border-box;
  width: calc(var(--dtb-cell) - 6px);
  height: calc(var(--dtb-row) - 8px);
  margin: 0;
  padding: 0;
  border: 1.5px dashed #cfe0d6;
  border-radius: 8px;
  background: transparent;
  color: var(--dtb-ink, #24332c);
  font: inherit;
  text-align: center;
  caret-color: transparent;
  outline: none;
  box-shadow: none;
  min-height: 0;
  -webkit-appearance: none;
  appearance: none;
}
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell.filled { border-color: transparent; }
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell:focus { border: 2px solid var(--dtb-green, #2f8f5b); background: #eaf6ef; box-shadow: 0 0 0 4px rgba(58, 158, 104, .14); }
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell:disabled { border-color: transparent; background: transparent; color: var(--dtb-ink, #24332c); -webkit-text-fill-color: var(--dtb-ink, #24332c); opacity: 1; }
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell.wrong.filled { color: var(--dtb-red, #cf3f2c); -webkit-text-fill-color: var(--dtb-red, #cf3f2c); border: 2px solid var(--dtb-red, #cf3f2c); border-radius: 50%; background: #fff3f1; }
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell.wrong:not(.filled) { border: 1.5px dashed #f0b8ae; background: transparent; box-shadow: none; }
.dtb-locked input.dtb-cell.dtb-cell.dtb-cell.dtb-cell:not(.filled) { visibility: hidden; }

.dtb-remove {
  justify-self: start;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1.5px solid #e2e9e5;
  border-radius: 50%;
  background: #fff;
  color: #8a9a92;
  font: 500 18px/1 var(--dv-sans, system-ui, sans-serif);
  cursor: pointer;
}
.dtb-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.dtb-action {
  min-height: 44px;
  padding: 0 18px;
  border: 1.5px solid #cfe0d6;
  border-radius: 999px;
  background: #fff;
  color: #23704a;
  font: 700 16px/1 var(--dv-sans, system-ui, sans-serif);
  cursor: pointer;
}
.dtb-action::before { content: "+ "; }
.dtb-action:disabled { opacity: .45; cursor: default; }

/* 循环小数：数字上面的小圆圈，点一下变成循环点 */
.dtb-repeat-wrap { display: inline-flex; flex-direction: column; gap: 6px; }
.dtb-repeat { display: inline-flex; font: 500 32px/1 var(--dv-mono, ui-monospace, Menlo, monospace); color: var(--dv-ink, #24332c); }
.dtb-repeat-slot { position: relative; display: inline-flex; flex-direction: column; align-items: center; width: 40px; }
.dtb-repeat-slot input.dtb-cell.dtb-cell.dtb-cell.dtb-cell { width: 34px; height: 44px; }
.dtb-repeat-slot .dtb-dot { right: -4px; bottom: 8px; }
.dtb-ring {
  width: 28px;
  height: 28px;
  margin: 0 0 2px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.dtb-ring::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  border: 2px dashed #9dbdab;
}
.dtb-ring.on::after { inset: 9px; border: 0; background: var(--dv-ink, #24332c); }
.dtb-ring.off { visibility: hidden; }
.dtb-repeat-tail { align-self: end; padding: 0 0 10px 2px; }
.dtb-repeat-tail[hidden] { display: none; }
.dtb-ring:disabled { cursor: default; }
.dtb-ring:disabled:not(.on)::after { border-color: transparent; }
.dtb-repeat-hint { color: #5d7a6c; font: 500 13px/1.5 var(--dv-sans, system-ui, sans-serif); }
.dtb-hidden-input { display: none !important; }
.review-fill-row.dtb-repeat-row { align-items: end; }

@media (max-width: 520px) {
  .dtb-pad { --dtb-cell: 32px; --dtb-row: 42px; --dtb-font: 27px; }
  .dtb-dot { bottom: 8px; width: 6px; height: 6px; right: -3px; }
  .dtb-repeat { font-size: 26px; }
  .dtb-repeat-slot { width: 31px; }
  .dtb-repeat-slot input.dtb-cell.dtb-cell.dtb-cell.dtb-cell { width: 28px; height: 38px; }
}

/* 页面原有的“作答行里的 span 变成小灰字”样式，不要带进课本格子 */
:is(.dtb-pad, .dtb-repeat-wrap) span:not(.dtb-repeat-hint) { min-width: 0; font: inherit; color: inherit; }
:is(.dtb-pad, .dtb-repeat-wrap) span.dtb-num.child { color: #2e6fb0; }
/* 循环小数那一行：格子一排放得下 */
.review-fill-row.dtb-repeat-row.dtb-repeat-row.dtb-repeat-row.dtb-repeat-row { grid-template-columns: minmax(96px, auto) 1fr; }
.dtb-repeat-wrap span.dtb-repeat.dtb-repeat { font: 500 32px/1 var(--dv-mono, ui-monospace, Menlo, monospace); color: var(--dv-ink, #24332c); }
.dtb-repeat-wrap span.dtb-repeat-slot.dtb-repeat-slot { width: 40px; flex: none; }
.dtb-repeat-slot input.dtb-cell.dtb-cell.dtb-cell.dtb-cell { width: 34px; min-width: 0; height: 44px; padding: 0; flex: none; font: inherit; }
@media (max-width: 520px) {
  .review-fill-row.dtb-repeat-row.dtb-repeat-row.dtb-repeat-row.dtb-repeat-row { grid-template-columns: 1fr; }
  .dtb-repeat-wrap span.dtb-repeat.dtb-repeat { font-size: 26px; }
  .dtb-repeat-wrap span.dtb-repeat-slot.dtb-repeat-slot { width: 33px; }
  .dtb-repeat-slot input.dtb-cell.dtb-cell.dtb-cell.dtb-cell { width: 29px; height: 38px; }
}

/* ===== 开发包 A：除数是小数（孩子自己移小数点） ===== */
/* 能点的小数点位置：常显一个虚线小圈（不靠悬停才看得见） */
.dtb-pad.dtb-shift .dtb-gap::after {
  content: "";
  position: absolute;
  left: calc(50% - 5px);
  bottom: 7px;
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  border: 1.5px dashed #8fb7a0;
  border-radius: 50%;
}
.dtb-pad.dtb-shift .dtb-gap.on::after, .dtb-pad.dtb-shift .dtb-gap.orig::after { border-color: transparent; }
.dtb-pad.dtb-shift .dtb-gap:focus-visible { box-shadow: inset 0 0 0 2px #ee913b; }
/* 孩子选的新小数点让前面的 0 成为多余的 0：划去（只是显示孩子自己这个数的写法） */
span.dtb-num.struck { color: #9aa7a0; }
span.dtb-num.struck::before {
  content: "";
  position: absolute;
  left: 22%;
  right: 22%;
  top: 50%;
  height: 2px;
  background: var(--dtb-red, #cf3f2c);
  transform: rotate(-35deg);
  pointer-events: none;
}
/* 提交后标出不对的地方（移位或某一步） */
.dtb-divisor.dtb-flag, span.dtb-num.dtb-flag { background: #fff0ed; box-shadow: 0 0 0 2px #e77769 inset; border-radius: 8px; }
input.dtb-cell.dtb-cell.dtb-cell.dtb-cell.dtb-flag { border: 2px solid #e77769; background: #fff0ed; }
.dtb-restore { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; }
.dtb-restore-note { color: #7b8f84; font-size: 13px; font-weight: 600; }
/* 仍然放不下时在格子区域内横向滚动，从左边开始（不会裁掉除数） */
.dtb-pad.dtb-shift > .dtb-sheet { align-self: stretch; justify-content: safe center; }
.dtb-restore .dtb-action::before { content: "↶ "; }