/* 备课面板：外壳（左边记录、右边当前对象）、新的一节、学习路线、导出；完整教案编辑、检查结果、进度、语音、依据沿用原样式。 */

.prep-field { display: flex; flex-direction: column; gap: 6px; font: var(--t-caption); color: var(--ink-2); margin: 0 0 14px; min-width: 0; }
.prep-field input, .prep-field select, .prep-field textarea { width: 100%; font: var(--t-body); }
.prep-field textarea { white-space: pre-wrap; }
.prep-disclosure { font: var(--t-caption); color: var(--muted); }
.prep-content-preview { margin: -6px 0 14px; padding: 10px 12px; border-radius: 12px; background: var(--env); font: var(--t-control); overflow-x: auto; }
.prep-unit { border-top: 1px solid var(--line); padding: 12px 0; }
.prep-unit > summary { padding: 6px 0 10px; font: var(--t-heading); }
.prep-unit h3, .prep-block-title { font: var(--t-caption); color: var(--accent-ink); margin: 18px 0 8px; }
.prep-editor [data-readonly="true"] { background: var(--control); }
.prep-voice { flex-basis: 100%; padding: 14px 0; border-top: 1px solid var(--line); }
.prep-voice p { font: var(--t-control); color: var(--muted); }
.prep-quality { padding: 14px 16px; margin: 16px 0; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); }
.prep-quality[data-status="passed"] { box-shadow: inset 0 0 0 1.5px var(--accent-ring); }
.prep-quality h3 { font: var(--t-heading); margin: 0 0 10px; }
.prep-quality p, .prep-quality li { font: var(--t-control); line-height: 1.8; overflow-wrap: anywhere; }
.prep-quality summary { padding: 10px 0; }
.prep-progress { padding: 12px 0 20px; }
.prep-progress h3 { font: var(--t-title); margin: 6px 0 16px; }
.prep-progress-track { height: 4px; overflow: hidden; border-radius: 2px; background: var(--line-strong); }
.prep-progress-track span { display: block; width: 35%; height: 100%; background: var(--accent); border-radius: inherit; animation: prep-wait 2s ease-in-out infinite alternate; }
.prep-progress-track[data-paused="true"] span { animation-play-state: paused; background: var(--muted); }
@keyframes prep-wait { from { transform: translateX(-10%); } to { transform: translateX(200%); } }
.prep-stages { display: flex; flex-wrap: wrap; gap: 8px 20px; padding: 0; list-style: none; margin: 18px 0; }
.prep-stages li { font: var(--t-control); color: var(--muted); }
.prep-stages li[data-state="current"] { color: var(--accent-ink); font-weight: 600; }
.prep-stages li[data-state="done"] { color: var(--ink-2); }
.prep-stages li[data-state="done"]::before { content: "✓ "; color: var(--accent); }
.prep-progress-detail { font: var(--t-control); color: var(--muted); font-variant-numeric: tabular-nums; }
.prep-voice-progress { display: block; appearance: none; width: 100%; height: 4px; margin: 12px 0 18px; border: 0; border-radius: 2px; background: var(--line-strong); accent-color: var(--accent); }
.prep-voice-progress::-webkit-progress-bar { background: var(--line-strong); border-radius: 2px; }
.prep-voice-progress::-webkit-progress-value { background: var(--accent); border-radius: 2px; }
.prep-voice-progress::-moz-progress-bar { background: var(--accent); border-radius: 2px; }

.prep-state-mark { width: 26px; height: 26px; flex: none; display: inline-grid; place-items: center; color: var(--accent); }
.prep-state-mark[hidden] { display: none !important; }
.prep-state-mark svg { width: 24px; height: 24px; overflow: visible; }
.prep-state-mark circle, .prep-state-mark path { fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.prep-state-mark .prep-state-track { stroke: var(--accent-soft); }
.prep-state-mark .prep-state-orbit { transform-origin: 14px 14px; }
.prep-state-mark .prep-state-check { stroke-dasharray: 1; stroke-dashoffset: 1; opacity: 0; }
.prep-state-mark .prep-state-failure, .prep-state-mark .prep-state-review { opacity: 0; }
.prep-state-mark[data-state="failed"] { color: var(--danger); }
.prep-state-mark[data-state="failed"] .prep-state-failure, .prep-state-mark[data-state="review"] .prep-state-review { opacity: 1; }


@media (prefers-reduced-motion: reduce) { .prep-progress-track span { animation: none; } }
:root[data-motion="reduced"] .prep-progress-track span { animation: none; }





/* ---------- 这节课的依据 ---------- */
.prep-basis { border-top: 1px solid var(--line); margin: 18px 0; }
.prep-basis-head { min-height: 48px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; cursor: pointer; list-style: none; border-radius: 10px; }
.prep-basis-head::-webkit-details-marker { display: none; }
.prep-basis-head::after { content: ""; width: 8px; height: 8px; margin-left: auto; border-right: 1.6px solid var(--muted); border-bottom: 1.6px solid var(--muted); transform: rotate(45deg) translateY(-2px); transition: transform 240ms var(--ease-out); }
.prep-basis[open] > .prep-basis-head::after { transform: rotate(-135deg) translateY(-2px); }
.prep-basis-head:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.prep-basis-heading { font: var(--t-heading); color: var(--ink); }
.prep-basis-summary { font: var(--t-caption); color: var(--muted); }
.prep-basis-summary[data-state="failed"] { color: var(--danger); }
.prep-basis-body { display: grid; gap: 8px; padding: 2px 0 8px; }
.prep-basis-used { font: var(--t-caption); color: var(--accent-ink); }
@media (prefers-reduced-motion: reduce) { .prep-basis-head::after { transition: none; } }
.prep-basis-verify { margin: 0; font: var(--t-control); color: var(--ink-2); line-height: 1.7; }
.prep-basis-line { margin: 0; font: var(--t-caption); color: var(--muted); }
.prep-basis-group h5 { margin: 8px 0 4px; font: var(--t-caption); color: var(--muted); }
.prep-basis-sources { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.prep-basis-sources li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; font: var(--t-control); line-height: 1.6; overflow-wrap: anywhere; }
.prep-basis-number { flex: none; font: var(--t-caption); color: var(--muted); font-variant-numeric: tabular-nums; }
.prep-basis-title { color: var(--ink); min-width: 0; }
a.prep-basis-title { text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
.prep-basis-site { font: var(--t-caption); color: var(--muted); }
.prep-basis-pages { display: inline-flex; flex-wrap: wrap; gap: 4px; }
.prep-basis-page { min-height: 30px; padding: 0 10px; border-radius: 9px; background: var(--control); font: var(--t-caption); color: var(--ink-2); transition: background var(--d-state), transform var(--d-press); }
.prep-basis-page:active { transform: scale(.975); background: var(--control-press); }
.prep-basis-page:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (hover: hover) and (pointer: fine) { .prep-basis-page:hover { background: var(--control-hover); } }
.prep-basis-viewer { border: 0; padding: 0; border-radius: var(--r-float); box-shadow: var(--sh-float); background: var(--float); width: min(920px, calc(100vw - 32px)); max-height: calc(100vh - 32px); color: var(--ink); }
.prep-basis-viewer::backdrop { background: rgba(20, 22, 28, .2); }
.prep-basis-viewer .source-viewer-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 12px 8px 20px; }
.prep-basis-viewer .source-viewer-head h2 { margin: 0; font: var(--t-heading); }
.prep-basis-viewer .source-viewer-body { padding: 0 20px 20px; }
.prep-basis-viewer img { display: block; width: 100%; height: auto; max-height: calc(100vh - 120px); object-fit: contain; border-radius: 10px; box-shadow: inset 0 0 0 1px var(--line); }

.prep-basis-checks { margin: 2px 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 6px 16px; }
.prep-basis-checks li { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--line); font: var(--t-control); }
.prep-check-label { color: var(--ink); }
.prep-check-state { font: var(--t-caption); color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.prep-basis-checks li[data-status="passed"] .prep-check-state { color: var(--accent-ink); }
.prep-basis-checks li[data-status="passed"] .prep-check-state::before { content: "✓ "; }
.prep-basis-checks li[data-status="failed"] .prep-check-state { color: var(--danger); }
.prep-basis-page-plain { min-height: 30px; padding: 0 4px; display: inline-flex; align-items: center; font: var(--t-caption); color: var(--muted); }
.prep-basis-format { padding: 0 6px; border-radius: 6px; background: var(--control); font: var(--t-caption); color: var(--ink-2); }
.prep-basis-tier { padding: 0 6px; border-radius: 6px; font: var(--t-caption); background: var(--control); color: var(--ink-2); }
.prep-basis-tier[data-tier="authoritative"] { background: var(--accent-tint); color: var(--accent-ink); }
.prep-basis-reason { flex-basis: 100%; padding-left: 4.2em; font: var(--t-caption); color: var(--muted); }
a.prep-basis-page { display: inline-flex; align-items: center; text-decoration: none; }

/* ---------- 面板外壳：和首页同一张白纸，左栏记录、右边当前对象，中间一条细线 ---------- */
.pd {
  position: fixed; inset: 16px; margin: auto; width: min(1180px, calc(100vw - 32px)); height: min(860px, calc(100dvh - 32px)); max-width: none; max-height: none;
  padding: 0; border: 0; border-radius: var(--r-paper); background: var(--paper); color: var(--ink); box-shadow: var(--sh-float);
  display: flex; flex-direction: column; overflow: hidden; font: var(--t-body);
}
.pd::backdrop { background: rgba(27, 28, 32, .18); }
.pd-head { flex: none; display: flex; align-items: center; gap: 10px; min-height: 60px; padding: 8px 12px 4px 24px; }
.pd-head h1 { margin: 0; font: var(--t-heading); }
.pd-side-toggle { display: none; }
.pd-head .spacer { flex: 1; }
.pd-layout { position: relative; flex: 1; min-height: 0; display: flex; }
.pd-side { width: 268px; flex: none; overflow-y: auto; overscroll-behavior: contain; padding: 6px 10px 20px; border-right: 1px solid var(--line); }
.pd-side-cap { margin: 18px 0 4px 14px; font: var(--t-caption); color: var(--muted); }
.pd-records { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.pd-row {
  position: relative; width: 100%; min-height: 54px; padding: 7px 12px 7px 16px; border-radius: 12px; display: flex; align-items: center; gap: 8px;
  background: transparent; color: var(--ink-2); text-align: left; white-space: normal; justify-content: flex-start;
}
.pd-new { min-height: 46px; font: 600 15px/1.4 var(--font); color: var(--ink); }
.pd-row[aria-current="true"] { background: var(--control); color: var(--ink); }
.pd-row[aria-current="true"]::before { content: ""; position: absolute; left: 6px; top: 14px; bottom: 14px; width: 3px; border-radius: 3px; background: var(--accent); }
.pd-row-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.pd-row-title { font: var(--t-control); color: inherit; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.pd-row-meta { font: 400 12px/1.4 var(--font); color: var(--muted); }
.pd-state { flex: none; font: 400 12px/1.4 var(--font); color: var(--muted); }
.pd-state[data-state="running"] { color: var(--accent-ink); }
.pd-state[data-state="running"]::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 5px; border-radius: 50%; background: var(--accent); vertical-align: 1px; }
.pd-state[data-state="failed"], .pd-state[data-state="check"] { color: var(--danger); }
.pd-side-empty { padding: 8px 16px; font: var(--t-caption); color: var(--muted); }
.pd-backup { margin: 12px 0 0 6px; font: var(--t-caption); }
@media (hover: hover) and (pointer: fine) { .pd-row:not(:disabled):hover { background: var(--control); } }

.pd-main { flex: 1; min-width: 0; overflow-y: auto; overscroll-behavior: contain; padding: 0 40px 40px; }
.pd-body { max-width: 760px; margin: 0 auto; }
.pd-message { max-width: 760px; margin: 0 auto; min-height: 22px; font: var(--t-control); color: var(--ink-2); }
.pd-message:empty { min-height: 8px; }
.pd-loading { color: var(--muted); font: var(--t-control); }
.pd-title { margin: 4px 0 18px; font: var(--t-display); letter-spacing: -.01em; }
.pd-note { font: var(--t-caption); color: var(--muted); }

/* ---------- 新的一节 ---------- */
.pd-block { margin: 0 0 26px; }
.pd-block-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
.pd-block-head h3 { margin: 0; font: var(--t-heading); }
.pd-input { width: 100%; font: var(--t-body); }
textarea.pd-input { resize: vertical; }
.pd-carry { margin: -6px 0 22px; padding: 12px 16px; border-radius: 16px; background: var(--accent-tint); }
.pd-carry > summary { font: 600 15px/1.5 var(--font); color: var(--accent-ink); cursor: pointer; }
.pd-carry-text { margin: 8px 0 0; max-height: 240px; overflow-y: auto; white-space: pre-wrap; font: var(--t-caption); color: var(--ink-2); }
.pd-chosen { display: flex; align-items: center; gap: 12px; padding: 14px 10px 14px 18px; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); }
.pd-chosen-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.pd-chosen-text b { font: 600 17px/1.45 var(--font); overflow-wrap: anywhere; }
.pd-chosen-text small { font: var(--t-caption); color: var(--muted); }
.pd-picker { border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); padding: 10px 14px 14px; }
.pd-picker-top { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pd-subjects { margin-left: -4px; }
.pd-own { margin-left: auto; }
.pd-own-row { display: flex; gap: 8px; margin-top: 10px; }
.pd-sections { margin-top: 8px; }
.pd-book { width: 100%; font: var(--t-control); margin-bottom: 4px; }
.pd-book-one { margin: 4px 0; font: var(--t-caption); color: var(--muted); }
.pd-chapters { max-height: min(42vh, 360px); overflow-y: auto; overscroll-behavior: contain; padding-right: 4px; }
.pd-chapter h4 { margin: 12px 0 6px; font: var(--t-caption); color: var(--muted); font-weight: 400; }
.pd-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.pd-chip { min-height: 38px; padding: 0 14px; border-radius: var(--r-pill); background: var(--control); color: var(--ink); font: var(--t-control); white-space: normal; text-align: left; }
.pd-chip[aria-pressed="true"] { background: var(--accent-tint); color: var(--accent-ink); box-shadow: inset 0 0 0 1.5px var(--accent); }
.pd-kinds { display: grid; grid-template-columns: repeat(auto-fit, minmax(136px, 1fr)); gap: 10px; }
.pd-kind {
  display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: 2px; min-height: 104px; padding: 14px 16px; border-radius: 16px; text-align: left; white-space: normal;
  background: var(--paper); box-shadow: inset 0 0 0 1px var(--line); color: var(--ink);
}
.pd-kind b { font: 600 16px/1.45 var(--font); }
.pd-kind span { font: var(--t-caption); color: var(--ink-2); }
.pd-kind small { margin-top: auto; padding-top: 6px; font: 400 12px/1.4 var(--font); color: var(--muted); }
.pd-kind[aria-checked="true"] { box-shadow: inset 0 0 0 2px var(--accent); }
.pd-kind:hover, .pd-kind:active { background: var(--paper); }
.pd-kind:active { transform: scale(.975); }
.pd-kind:disabled span { color: var(--muted); }
@media (hover: hover) and (pointer: fine) { .pd-kind:not(:disabled):not([aria-checked="true"]):hover, .pd-chip:hover { box-shadow: inset 0 0 0 1px var(--line-strong), var(--sh-touch); } }
.pd-options { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 14px; }
.pd-option { display: flex; align-items: center; gap: 10px; }
.pd-option-label { font: var(--t-caption); color: var(--muted); }
.pd-seg { display: inline-flex; padding: 3px; border-radius: 14px; background: var(--control); gap: 2px; }
.pd-seg button { min-height: 38px; padding: 0 14px; border-radius: 11px; background: transparent; color: var(--ink-2); font: var(--t-control); }
.pd-seg button[aria-checked="true"] { background: var(--paper); color: var(--ink); box-shadow: var(--sh-touch), 0 0 0 1px var(--line); font-weight: 600; }
.pd-more { margin: -8px 0 24px; }
.pd-more > summary { min-height: 44px; display: flex; align-items: center; font: var(--t-control); color: var(--ink-2); cursor: pointer; }
.pd-video { margin: 8px 0 0; }
.pd-video-row { display: flex; gap: 8px; }
.pd-video-row .pd-input:first-child { flex: 1; min-width: 0; }
.pd-video-page { flex: 0 0 96px; width: 96px; }
.pd-video-note { margin: 6px 0 0; }
.pd-teachers { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.pd-teacher-names { font: var(--t-control); color: var(--ink); }
.pd-teacher { flex: 1 1 120px; width: auto; min-width: 0; }
.pd-foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding-top: 18px; border-top: 1px solid var(--line); }
.pd-foot-note { flex: 1 1 300px; margin: 0; font: var(--t-caption); color: var(--muted); }
.pd-start { min-width: 160px; min-height: 52px; font-size: 16px; }

/* 拍笔记 */
.pd-notes { margin-top: 14px; padding: 14px 16px; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); }
.pd-notes-hint { margin: 0 0 10px; font: var(--t-caption); color: var(--muted); }
.pd-notes-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pd-file { position: relative; display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: var(--r-control); background: var(--control); font: var(--t-control); color: var(--ink); cursor: pointer; }
.pd-file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.pd-file:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.pd-note-pages { display: grid; gap: 12px; margin-bottom: 12px; }
.pd-note-page { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 12px; align-items: start; }
.pd-note-page img { width: 100%; max-height: 320px; object-fit: contain; border-radius: 10px; background: var(--control); }
.pd-note-state { font: var(--t-caption); color: var(--muted); }

/* ---------- 一份备课记录 ---------- */
.pd-item-head .pd-title { margin-bottom: 6px; }
.pd-item-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0 0 22px; font: var(--t-control); color: var(--muted); }
.pd-sub { margin: 22px 0 10px; font: var(--t-heading); }
.pd-goals { margin: 0; padding-left: 20px; line-height: 1.9; }
.pd-route { list-style: none; margin: 0; padding: 0; position: relative; }
.pd-stop { position: relative; display: flex; gap: 14px; padding: 0 0 18px; }
.pd-stop::before { content: ""; position: absolute; left: 6px; top: 22px; bottom: 2px; width: 2px; background: var(--line); }
.pd-stop:last-child::before { display: none; }
.pd-stop-dot { flex: none; width: 14px; height: 14px; margin-top: 5px; border-radius: 50%; box-shadow: inset 0 0 0 2px var(--line-strong); background: var(--paper); }
.pd-stop-text { min-width: 0; }
.pd-stop-text b { font: 600 16px/1.5 var(--font); }
.pd-stop-text small { display: block; font: var(--t-caption); color: var(--muted); }
.pd-stop-text p { margin: 2px 0 0; font: var(--t-control); color: var(--ink-2); }
.pd-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 18px 0 4px; margin-top: 18px; border-top: 1px solid var(--line); }
.pd-actions > .primary { min-width: 150px; min-height: 50px; }
.pd-export { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.pd-check { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 8px; font: var(--t-caption); color: var(--ink-2); }
.pd-export-note { font: var(--t-caption); color: var(--muted); }
.pd-failed .primary { margin-top: 8px; }

@media (max-width: 860px), (orientation: portrait) {
  .pd { inset: auto 0 0 0; width: 100vw; height: calc(100dvh - 24px); border-radius: var(--r-paper) var(--r-paper) 0 0; }
  .pd-side-toggle { display: inline-flex; margin-left: -6px; }
  .pd-head { padding-left: 14px; }
  .pd-side { position: absolute; z-index: 3; top: 0; bottom: 0; left: 0; width: min(320px, 86vw); background: var(--paper); box-shadow: var(--sh-float); border-right: 0; border-radius: 0 18px 0 0; transform: translateX(-104%); transition: transform var(--d-space) var(--ease-space); }
  .pd[data-side="open"] .pd-side { transform: none; }
  .pd-main { padding: 0 20px 32px; }
  .pd-note-page { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 600px) {
  .pd-title { font: var(--t-title); }
  .pd-kinds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pd-start { flex: 1 1 100%; }
}