/* 课程页 Mixly iframe 编程区 */
.code-lab {
  margin: 0.85em 0 0.5em;
  padding: 10px 12px;
  background: #f3f7f4;
  border: 1px solid #c5d4c9;
  border-radius: 16px;
}

.lab-picker {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.45rem 0.65rem;
  margin-bottom: 0.28rem; /* 原 0.55rem 的一半 */
  width: 100%;
}

.lab-picker label {
  font-weight: 600;
  color: #1f5c4a;
  font-size: 0.92rem;
  flex: 0 0 auto;
  white-space: nowrap;
}

.lab-select {
  flex: 1 1 auto;
  min-width: 0;
  max-width: none;
  width: auto;
  height: 36px;
  box-sizing: border-box;
  padding: 0 0.65rem;
  border: 1px solid #b7c9bc;
  border-radius: 10px;
  background: #fff;
  font: inherit;
  font-size: 0.9rem;
  line-height: 1.2;
}

/* 运行/检查/重置：右对齐，高度与下拉一致 */
.lab-picker .lab-actions {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 0 auto;
  flex: 0 0 auto;
}

.lab-picker .lab-actions .code-run,
.lab-picker .lab-actions .code-check,
.lab-picker .lab-actions .code-reset,
.lab-picker .lab-actions .code-load,
.lab-picker .lab-actions .code-save-image {
  height: 36px;
  box-sizing: border-box;
  margin: 0;
  padding: 0 14px;
  font-size: 0.88rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid #b9d5ca;
  background: #e7f5ef;
  color: #1f5c4a;
  white-space: nowrap;
}

.lab-picker .lab-actions .code-load {
  background: #1f5c4a;
  border-color: #1f5c4a;
  color: #e7f5ef;
  font-weight: 600;
}

.lab-picker .lab-actions .code-load:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.lab-picker .lab-actions .code-run.is-running {
  background: #fde8e6;
  border-color: #d48a84;
  color: #8b2e28;
  font-weight: 600;
}

.lab-picker .lab-actions .code-check {
  background: #fff4df;
  border-color: #e0c08a;
}

.lab-picker .lab-actions .code-save-image {
  background: #e8f0ff;
  border-color: #9bb6e0;
  color: #1f3f7a;
}

/* 选题行下方不再显示 hint，Mixly 紧贴其上 */
.lab-hint {
  display: none !important;
}

@media (max-width: 1024px) {
  .lab-picker {
    flex-wrap: wrap;
  }
  .lab-picker .lab-actions {
    margin-left: 0;
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  .lab-select,
  .lab-picker .lab-actions .code-run,
  .lab-picker .lab-actions .code-check,
  .lab-picker .lab-actions .code-reset,
  .lab-picker .lab-actions .code-load,
  .lab-picker .lab-actions .code-save-image,
  .code-lab .lab-actions .code-maximize.lab-max-toolbar {
    min-height: 44px;
    height: auto;
    padding: 10px 14px;
    touch-action: manipulation;
  }
}

@media (pointer: coarse) {
  .lab-select,
  .lab-picker .lab-actions .code-run,
  .lab-picker .lab-actions .code-check,
  .lab-picker .lab-actions .code-reset,
  .lab-picker .lab-actions .code-load,
  .lab-picker .lab-actions .code-save-image {
    min-height: 44px;
    height: auto;
    touch-action: manipulation;
  }
}

.lab-title {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: #1f5c4a;
}

.lab-ref {
  display: none !important;
}

.lab-ref:not([open]) {
  padding-bottom: 0.35rem;
}

.lab-ref summary {
  cursor: pointer;
  font-weight: 600;
  color: #1f5c4a;
  padding: 0.35rem 0;
  user-select: none;
  list-style: none;
}

.lab-ref summary::-webkit-details-marker {
  display: none;
}

.lab-ref summary::before {
  content: "▶ ";
  font-size: 0.75em;
  color: #5a7a6a;
}

.lab-ref[open] summary::before {
  content: "▼ ";
}

.lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0.5rem;
}

/* 已并入 lab-picker 时，不再单独占一行的外边距 */
.lab-picker > .lab-actions {
  margin: 0;
  display: inline-flex !important;
}

/* 禁止按钮留在编程区下方再出一行 */
.code-lab > .lab-actions {
  display: none !important;
}

.lab-actions .code-run,
.lab-actions .code-check,
.lab-actions .code-reset {
  cursor: pointer;
}

.code-output,
.code-check-result {
  margin: 0.4rem 0 0;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: 1px solid #c5d4c9;
  background: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  min-height: 2.2em;
}

/* 检查结果：放在 Mixly 下方；显示时由 fit 压缩 iframe，整体高度不变 */
.code-lab .code-check-result {
  box-sizing: border-box;
  height: auto;
  max-height: 120px;
  min-height: 2.2em;
  overflow-x: hidden;
  overflow-y: auto;
  flex: 0 0 auto;
  -webkit-overflow-scrolling: touch;
  margin: 6px 0 0;
}
.code-lab .code-check-result[hidden] {
  display: none !important;
  height: 0;
  max-height: 0;
  min-height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  flex: 0 0 0;
}
.code-lab .code-check-result.is-flash {
  animation: xlab-check-flash 0.85s ease;
}
@keyframes xlab-check-flash {
  0% { box-shadow: 0 0 0 0 rgba(31, 92, 74, 0.45); }
  40% { box-shadow: 0 0 0 4px rgba(31, 92, 74, 0.28); }
  100% { box-shadow: 0 0 0 0 rgba(31, 92, 74, 0); }
}

/* Mixly 课：程序输出只在 iframe 底部，隐藏外侧运行输出框 */
.code-lab:has(iframe.mixly-iframe) > .code-output,
.code-lab:has(.mixly-iframe-wrap) > .code-output {
  display: none !important;
}

.code-check-result.is-correct {
  border-color: #3d8b6e;
  background: #eef8f3;
  color: #1f5c4a;
}

.code-check-result.is-wrong {
  border-color: #c47a6a;
  background: #fff5f2;
  color: #7a2e22;
}

.lab-ref-code {
  margin: 0.35rem 0 0;
  padding: 0.75rem 0.85rem;
  overflow: auto;
  max-height: 220px;
  background: #f7faf8;
  border-radius: 8px;
  border: 1px solid #e0eae3;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre;
}

.lab-ref-code code {
  font: inherit;
  color: #24352e;
}

.mixly-iframe-wrap {
  position: relative;
  width: 100%;
  /* 高度一律由 mixly-lab-fit.js 设定（静态预览与载入后同一规则）；此处仅作脚本未跑时的兜底 */
  flex: 1 1 auto;
  height: auto;
  min-height: 360px;
  max-height: none;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #b7c9bc;
  /* idle/loading 预览底色与 Mixly 顶栏接近，避免露白边 */
  background: #152822;
  box-shadow: 0 8px 24px rgba(31, 92, 74, 0.08);
}

/* JS 设定精确高度后，取消 CSS 兜底，避免把 lab 撑出留白。
   idle 保留 min-height：软翻页停车场 early-return 若漏 fit，预览 absolute 不占高，会塌成一条线 */
.code-lab.mixly-ready .mixly-iframe-wrap,
.code-lab.mixly-active .mixly-iframe-wrap,
.code-lab.mixly-loading .mixly-iframe-wrap,
.code-lab.is-maximized .mixly-iframe-wrap {
  min-height: 0;
}
.code-lab.mixly-idle .mixly-iframe-wrap {
  min-height: 360px;
  /* idle 高度由 CSS 固定，避免 JS fit↔resize 互激闪烁 */
  height: min(48vh, 440px);
  max-height: none;
}
.code-lab.mixly-idle:not(.is-maximized) {
  height: auto;
  max-height: none;
}

/* 未载入：完整静态预览（含仿真区），点击或点「载入」后再露出真实 Mixly */
.mixly-preview {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: block;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  cursor: pointer;
  background: #152822;
  overflow: hidden;
}
.mixly-preview[hidden] {
  display: none !important;
}
/* idle / loading：永远右图完整首屏静态预览，绝不露出半载入 iframe（避免灰边半成品） */
.code-lab.mixly-idle .mixly-preview,
.code-lab.mixly-loading .mixly-preview {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  z-index: 5;
}
/* 闲置时「点击载入」必须可点，不必等 Loaded basthon */
.code-lab.mixly-idle:not(.mixly-loading) .mixly-preview {
  pointer-events: auto !important;
  cursor: pointer !important;
}
.code-lab.mixly-idle .mixly-iframe,
.code-lab.mixly-loading .mixly-iframe {
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
  z-index: 0 !important;
}
/* 换题/翻页注入：遮住 iframe，禁止露出上一题积木或空白闪屏 */
.code-lab.mixly-switching .mixly-iframe {
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}
.code-lab.mixly-switching .mixly-load-modal {
  background: rgba(22, 48, 38, 0.92);
}
.code-lab.mixly-loading .mixly-preview {
  pointer-events: none !important;
}
.code-lab.mixly-loading .mixly-preview-cta {
  display: none !important;
}
.code-lab.mixly-loading .mixly-preview-mask {
  background: rgba(15, 40, 34, 0.38);
}
.mixly-preview-img {
  display: block;
  width: 100%;
  height: 100%;
  /* 裁剪铺满：无黑边；预览图本身已去掉外围 letterbox */
  object-fit: cover;
  object-position: center center;
  background: #152822;
  filter: none;
}
.mixly-preview-mask {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    180deg,
    rgba(15, 40, 34, 0.06) 0%,
    rgba(15, 40, 34, 0.4) 100%
  );
  pointer-events: none;
}
.mixly-preview-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  background: #1f5c4a;
  color: #e7f5ef;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 28px rgba(15, 40, 34, 0.35);
}
.mixly-preview-icon {
  display: inline-block;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  background: center / contain no-repeat
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='10' stroke='%23e7f5ef' stroke-width='2'/%3E%3Cpath d='M10 8.5v7l6-3.5-6-3.5z' fill='%23e7f5ef'/%3E%3C/svg%3E");
}
.mixly-preview-cta-text {
  line-height: 1;
}
.code-lab.mixly-active:not(.mixly-idle):not(.mixly-loading) .mixly-preview {
  display: none !important;
}

.code-load {
  border: 1px solid #1f5c4a;
  background: #1f5c4a;
  color: #e7f5ef;
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: inherit;
  margin-right: 8px;
  font-weight: 600;
}
.code-load:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.code-lab:has(.mixly-iframe-wrap) {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  /* 未载入靠 wrap min-height；载入后 JS 设精确高度。勿用 100dvh 把页面撑破 */
  min-height: 0;
  margin-top: 0;
  margin-bottom: 0;
}

/* 旧版浮层放大钮：一律隐藏（改由 lab-actions 工具条统一放置） */
.mixly-iframe-wrap > .code-maximize,
.mixly-iframe-wrap > .code-maximize.mixly-max-overlay {
  display: none !important;
}

/* 工具条「最大化」：与载入／检查／重置同排，不遮挡 Mixly 顶栏 */
.code-lab .lab-actions .code-maximize.lab-max-toolbar {
  display: none;
  position: static;
  align-items: center;
  gap: 4px;
  width: auto;
  height: auto;
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid #c47b2d;
  border-radius: 8px;
  background: #fff8eb;
  color: #8a5a12;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  box-shadow: none;
}
.code-lab.mixly-active:not(.mixly-idle):not(.mixly-loading) .lab-actions .code-maximize.lab-max-toolbar {
  display: inline-flex !important;
}
.code-lab .lab-actions .code-maximize.lab-max-toolbar svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}
.code-lab .lab-actions .code-maximize.lab-max-toolbar.is-maximized {
  background: #eef8f3;
  border-color: #3d8b6e;
  color: #0f766e;
}

.lab-ref,
.lab-ref-code {
  display: none !important;
}

.mixly-iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

/* MixNT：iframe 绝对铺满 wrap，避免露出 #152822 深绿底块 */
.code-lab.mixly-ready .mixly-iframe-wrap,
.code-lab.mixly-active .mixly-iframe-wrap {
  background: #f8f9fa;
}
.mixly-iframe-wrap > iframe.mixly-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
}
.code-lab.mixly-idle .mixly-iframe-wrap > iframe.mixly-iframe,
.code-lab.mixly-loading .mixly-iframe-wrap > iframe.mixly-iframe {
  z-index: 0;
}

/* Mixly 载入模态进度 */
.mixly-load-modal {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(22, 48, 38, 0.55);
  backdrop-filter: blur(2px);
  transition: opacity 0.35s ease;
}

.mixly-load-modal[hidden] {
  display: none !important;
}

.mixly-load-modal.is-leaving {
  opacity: 0;
  pointer-events: none;
}

.mixly-load-card {
  width: min(100%, 380px);
  padding: 1.35rem 1.4rem 1.25rem;
  border-radius: 16px;
  background: #fffef9;
  border: 1px solid #c5d4c9;
  box-shadow: 0 16px 40px rgba(16, 40, 30, 0.28);
  color: #1f5c4a;
  text-align: center;
}

.mixly-load-title {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.mixly-load-tip {
  margin: 0 0 1rem;
  min-height: 2.6em;
  color: #3a5a4c;
  font-size: 0.92rem;
  line-height: 1.45;
}
/* 换题遮罩：单行提示，不堆两行文案 */
.mixly-load-modal.is-switch .mixly-load-tip {
  display: none !important;
  min-height: 0 !important;
  margin: 0 !important;
}
.mixly-load-modal.is-switch .mixly-load-title {
  margin: 0 0 0.9rem;
}
.mixly-load-modal.is-quick-switch .mixly-load-time {
  display: none !important;
}
.mixly-load-modal.is-quick-switch .mixly-load-meta {
  justify-content: center;
}

.mixly-load-track {
  height: 10px;
  border-radius: 999px;
  background: #e0eae3;
  overflow: hidden;
}

.mixly-load-bar {
  height: 100%;
  width: 8%;
  border-radius: inherit;
  background: linear-gradient(90deg, #3d8b6e, #5cb88a 55%, #7ed0a4);
  transition: width 0.45s ease;
}

.mixly-load-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.55rem;
  color: #5a7a6a;
  font-size: 0.8rem;
}

.mixly-load-modal.is-error .mixly-load-card {
  border-color: #e0a090;
  background: #fff8f5;
}

.mixly-load-modal.is-error .mixly-load-bar {
  background: #c47a6a;
  width: 100% !important;
}

.code-lab.mixly-idle .code-maximize.lab-max-toolbar,
.code-lab.mixly-loading .code-maximize.lab-max-toolbar {
  display: none !important;
}

.code-lab.is-maximized .mixly-iframe-wrap {
  flex: 1 1 auto;
  height: auto !important;
  min-height: 0;
  max-height: none;
}

.code-lab.is-maximized .lab-ref,
.code-lab.is-maximized .lab-hint,
.code-lab.is-maximized .code-note {
  display: none;
}

.code-lab.is-maximized .lab-picker {
  flex: 0 0 auto;
  margin-bottom: 0.35rem;
}

/* 最大化时仍保留题目栏操作（含「还原」），仅隐藏输出区等 */
.code-lab.is-maximized .code-output,
.code-lab.is-maximized .code-check-result,
.code-lab.is-maximized .lab-progress {
  flex: 0 0 auto;
}
.code-lab.is-maximized .code-check-result:not([hidden]) {
  flex: 0 0 120px;
  height: 120px;
  max-height: 120px;
}

@media (max-width: 1024px) {
  .mixly-iframe-wrap {
    min-height: 320px;
  }
  .code-lab.mixly-ready .mixly-iframe-wrap,
  .code-lab.mixly-active .mixly-iframe-wrap,
  .code-lab.mixly-loading .mixly-iframe-wrap,
  .code-lab.is-maximized .mixly-iframe-wrap {
    min-height: 0;
  }
  .code-lab.mixly-idle .mixly-iframe-wrap {
    min-height: 320px;
    height: min(46vh, 400px);
  }
}

/* 保存格式选择 */
.mixly-save-format-mask {
  position: fixed;
  inset: 0;
  z-index: 10050;
  background: rgba(20, 36, 48, 0.42);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
}

.mixly-save-format-dialog {
  width: min(420px, 100%);
  background: #fff;
  border-radius: 16px;
  border: 1px solid #c5d4c9;
  box-shadow: 0 16px 40px rgba(20, 40, 30, 0.18);
  padding: 1.1rem 1.15rem 1rem;
  font-family: inherit;
  color: #1a2e28;
}

.mixly-save-format-dialog h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  color: #1f5c4a;
}

.mixly-save-format-hint {
  margin: 0 0 0.85rem;
  font-size: 0.92rem;
  color: #4a635a;
}

.mixly-save-format-opts {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.mixly-save-fmt-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  width: 100%;
  text-align: left;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  border: 1.5px solid #b7c9bc;
  background: #f7faf8;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.mixly-save-fmt-btn strong {
  font-size: 1rem;
  color: #1f3f7a;
}

.mixly-save-fmt-btn span {
  font-size: 0.84rem;
  color: #5a6f66;
  line-height: 1.35;
}

.mixly-save-fmt-btn:hover,
.mixly-save-fmt-btn:focus-visible {
  border-color: #6a9ad4;
  background: #eef4ff;
  outline: none;
}

.mixly-save-fmt-btn.is-last {
  border-color: #6a9ad4;
  background: #e8f0ff;
}

.mixly-save-fmt-btn[data-fmt="svg"] strong {
  color: #1f5c4a;
}

.mixly-save-fmt-cancel {
  margin-top: 0.75rem;
  width: 100%;
  height: 36px;
  border-radius: 999px;
  border: 1px solid #c5d0c9;
  background: #fff;
  color: #4a635a;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
}

@media (max-width: 1024px), (pointer: coarse) {
  .mixly-save-fmt-btn,
  .mixly-save-fmt-cancel {
    min-height: 44px;
    height: auto;
    padding: 10px 14px;
    touch-action: manipulation;
  }
  .mixly-preview-cta {
    min-height: 48px;
    padding: 16px 28px;
  }
}

/* 课页摄像头 FAB：与翻页错开，触控友好 */
.ailessons-cam-fab {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  max-width: 280px;
}
.ailessons-cam-fab-btn {
  min-height: 44px;
  touch-action: manipulation;
}


.mixly-save-fmt-cancel:hover {
  background: #f3f7f4;
}