/* Words Scroll · Lectures (beta) · V6.7.0 — scoped under #view-lectures (+ .ws-lect-modal on body). Theme tokens only. */

/* beta gate: :not(#…) lifts specificity to (1,2,2) so it beats the inline
   "html body nav:not(.ws-v4-mobile-nav):not([data-ws-mobile-nav]) button[data-tab]{display:flex!important}" (0,3,4) */
body.ws-lectures-off nav button[data-tab="lectures"]:not(#wsLecturesNeverMatches){display:none!important;}
/* desktop nav icon slot; the visible label is the button text itself (desktop ::after is content:none!important site-wide) */
@media(min-width:769px){
  nav button[data-tab="lectures"]:before{content:"▤";}
}

/* readable text variants: pastel themes (cute-pink accent #e27ea5 on #ffe1eb ≈ 2.2:1) need the accent pulled toward ink for small text;
   dark themes mix toward a light ink so they stay light on dark. --solid-text is the site's own "text on accent fill" token. */
#view-lectures{color:var(--ink);--lx-accent-ink:color-mix(in srgb,var(--accent) 62%,var(--ink));--lx-amber-ink:color-mix(in srgb,var(--amber) 62%,var(--ink));--lx-on-accent:var(--solid-text,#fff);}
#view-lectures .lx{max-width:980px;margin:0 auto;display:grid;gap:16px;font-family:var(--cjk);}
#view-lectures .lx *{box-sizing:border-box;}
#view-lectures .lx-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:2px 2px 0;}
#view-lectures .lx-crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--ink-soft);}
#view-lectures .lx-crumb{background:none;border:0;padding:4px 6px;border-radius:8px;color:var(--ink-soft);font:inherit;font-size:14px;cursor:pointer;}
#view-lectures .lx-crumb:hover{background:var(--accent-soft);color:var(--accent);}
#view-lectures .lx-crumb.current{color:var(--ink);font-weight:800;cursor:default;font-size:20px;}
#view-lectures .lx-crumbs .lx-crumb:first-child{font-weight:800;color:var(--ink);}
#view-lectures .lx-sep{color:var(--ink-faint);}
#view-lectures .lx-quota{font-size:12px;color:var(--ink-faint);}

/* surfaces */
#view-lectures .lx-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 20px;box-shadow:var(--shadow);}
#view-lectures .lx-two{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
#view-lectures .lx-sec{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:4px;}
#view-lectures .lx-sec.tight{margin:0 0 10px;align-items:flex-start;}
#view-lectures .lx-sec h3{margin:0;font-size:15px;font-weight:800;letter-spacing:.02em;color:var(--ink);}
#view-lectures .lx-sec h3 small{font-weight:600;color:var(--ink-faint);margin-left:6px;}
#view-lectures .lx-label{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint);}
#view-lectures .lx-label small{text-transform:none;letter-spacing:0;font-weight:600;margin-left:6px;}
#view-lectures .lx-muted{color:var(--ink-soft);line-height:1.55;}
#view-lectures .lx-muted.small,#view-lectures .small{font-size:13px;}
#view-lectures .lx-muted.bad,#view-lectures .bad{color:var(--rose);}
#view-lectures .lx-center{text-align:center;padding:34px 24px;}
#view-lectures .lx-big{font-size:26px;font-weight:800;line-height:1.25;margin:6px 0 8px;}
#view-lectures .lx-big small{display:block;font-size:14px;font-weight:600;color:var(--ink-soft);margin-top:4px;}
#view-lectures p{margin:6px 0 10px;}
#view-lectures .center{text-align:center;justify-content:center;}
#view-lectures .lx-grow{flex:1;}

/* buttons */
#view-lectures .lx-btn{appearance:none;border:1px solid var(--line-strong);background:var(--card);color:var(--ink);border-radius:12px;padding:9px 16px;font:inherit;font-size:14px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:8px;line-height:1.2;transition:background .15s,transform .08s,border-color .15s;}
#view-lectures .lx-btn:hover{border-color:var(--accent);color:var(--accent);}
#view-lectures .lx-btn:active{transform:translateY(1px);}
#view-lectures .lx-btn:disabled{opacity:.5;cursor:not-allowed;}
#view-lectures .lx-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--lx-on-accent);}
#view-lectures .lx-btn.primary:hover{filter:brightness(1.06);color:var(--lx-on-accent);}
#view-lectures .lx-btn.ghost{background:transparent;border-color:transparent;color:var(--ink-soft);}
#view-lectures .lx-btn.ghost:hover{background:var(--accent-soft);color:var(--accent);}
#view-lectures .lx-btn.lx-danger{color:var(--rose);}
#view-lectures .lx-btn.lx-danger:hover{background:color-mix(in srgb,var(--rose) 12%,transparent);border-color:var(--rose);color:var(--rose);}
#view-lectures .lx-btn.small{padding:6px 12px;font-size:13px;border-radius:10px;}
#view-lectures .lx-btn.big{padding:14px 28px;font-size:17px;border-radius:14px;}
#view-lectures .lx-btn small{font-weight:600;opacity:.75;}
#view-lectures .lx-btn kbd{font:inherit;font-size:11px;font-weight:700;padding:1px 6px;border-radius:6px;border:1px solid currentColor;opacity:.6;}
#view-lectures .lx-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px;}
#view-lectures .lx-add{width:100%;justify-content:center;min-height:100%;}

/* inputs */
#view-lectures input:not([type=checkbox]),#view-lectures textarea,#view-lectures select{font:inherit;font-size:14px;color:var(--ink);background:color-mix(in srgb,var(--card) 80%,var(--paper));border:1px solid var(--line);border-radius:10px;padding:8px 10px;width:100%;}
#view-lectures input:focus,#view-lectures textarea:focus,#view-lectures select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
#view-lectures textarea{resize:vertical;line-height:1.5;min-height:60px;}
#view-lectures textarea.saved,#view-lectures input.saved{border-color:var(--accent);}
#view-lectures .lx-form{display:grid;gap:10px;}
#view-lectures .lx-form label{display:grid;gap:4px;font-size:12px;font-weight:700;color:var(--ink-faint);}
#view-lectures .lx-form.inline{padding:16px 18px;}
#view-lectures .lx-form-row{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end;}
#view-lectures .lx-check{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--ink-faint);cursor:pointer;}
#view-lectures .lx-check input{width:16px;height:16px;accent-color:var(--accent);}
#view-lectures .lx-fields{display:flex;gap:10px;flex:1;min-width:0;flex-wrap:wrap;}
#view-lectures .lx-title-input{font-size:20px;font-weight:800;flex:1 1 280px;background:transparent;border-color:transparent;padding:6px 8px;}
#view-lectures .lx-title-input:hover{border-color:var(--line);}
#view-lectures .lx-code-input{flex:0 1 160px;}
#view-lectures input[type=date]{flex:0 1 170px;width:auto;}

/* dashboard */
#view-lectures .lx-due{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start;}
#view-lectures .lx-due-n{font-size:56px;font-weight:900;line-height:1;color:color-mix(in srgb,var(--accent) 80%,var(--ink));margin:4px 0;font-family:var(--serif);}
#view-lectures .lx-forecast{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:8px;align-items:end;}
#view-lectures .lx-fc-col{display:grid;justify-items:center;gap:3px;font-size:11px;color:var(--ink-faint);}
#view-lectures .lx-fc-col b{color:var(--ink-soft);font-size:12px;}
#view-lectures .lx-fc-bar{height:46px;display:flex;align-items:flex-end;width:100%;}
#view-lectures .lx-fc-bar i{display:block;width:100%;border-radius:6px 6px 2px 2px;background:var(--accent-soft);border-top:2px solid var(--accent);}
#view-lectures .lx-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;}
#view-lectures .lx-course{position:relative;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 18px 16px 22px;box-shadow:var(--shadow);cursor:pointer;font:inherit;color:var(--ink);display:grid;gap:8px;transition:border-color .15s,transform .12s;}
#view-lectures .lx-course:hover{border-color:var(--accent);transform:translateY(-1px);}
#view-lectures .lx-course.add{border-style:dashed;box-shadow:none;background:transparent;cursor:default;padding:14px;}
#view-lectures .lx-course.add:hover{transform:none;border-color:var(--line-strong);}
#view-lectures .lx-course b{font-size:17px;font-weight:800;line-height:1.3;}
#view-lectures .lx-course small{color:var(--ink-faint);font-weight:600;margin-top:-6px;}
#view-lectures .lx-dot{position:absolute;left:0;top:18px;bottom:18px;width:5px;border-radius:0 4px 4px 0;background:var(--accent);}
#view-lectures .lx-dot.big{position:static;width:14px;height:14px;border-radius:50%;flex:0 0 14px;margin-top:14px;}
#view-lectures .lx-meta{font-size:13px;color:var(--ink-soft);}
#view-lectures .lx-meta em{font-style:normal;color:var(--accent);font-weight:800;}
#view-lectures .lx-intro{padding:24px 26px;}

/* chips & badges */
#view-lectures .lx-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px;}
#view-lectures .lx-chip{font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--accent-soft);color:var(--lx-accent-ink);white-space:nowrap;}
#view-lectures .lx-chip.soon{background:color-mix(in srgb,var(--amber) 18%,transparent);color:var(--lx-amber-ink);}
#view-lectures .lx-chip.past{background:color-mix(in srgb,var(--ink-faint) 16%,transparent);color:var(--ink-faint);text-decoration:line-through;}
#view-lectures .lx-chip.faint{background:color-mix(in srgb,var(--ink-faint) 12%,transparent);color:var(--ink-soft);}
#view-lectures .lx-chip.star{background:color-mix(in srgb,var(--amber) 20%,transparent);color:var(--lx-amber-ink);}
#view-lectures .lx-badge{font-size:11px;font-weight:800;letter-spacing:.04em;padding:2px 8px;border-radius:7px;background:color-mix(in srgb,var(--ink-faint) 14%,transparent);color:var(--ink-soft);border:0;font-family:inherit;}
#view-lectures .lx-badge.ok{background:var(--accent-soft);color:var(--lx-accent-ink);}
#view-lectures .lx-badge.key{background:color-mix(in srgb,var(--amber) 18%,transparent);color:var(--lx-amber-ink);}
#view-lectures .lx-badge.faint{opacity:.8;}
#view-lectures .lx-badge.link{cursor:pointer;background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--lx-accent-ink);}
#view-lectures .lx-badge.link:hover{background:var(--accent);color:var(--lx-on-accent);}
#view-lectures .lx-badge.exam{background:var(--terra);color:var(--lx-on-accent);letter-spacing:.12em;padding:3px 10px;}

/* course */
#view-lectures .lx-course-head{display:flex;align-items:flex-start;gap:14px;}
#view-lectures .lx-exam-rows{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0;}
#view-lectures .lx-exam-rows label{display:grid;gap:4px;font-size:12px;font-weight:700;color:var(--ink-faint);}
#view-lectures .lx-exam-rows input[type=date]{width:100%;}
#view-lectures .lx-list{display:grid;gap:8px;}
#view-lectures .lx-row{display:flex;align-items:center;justify-content:space-between;gap:14px;width:100%;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 16px;font:inherit;color:var(--ink);cursor:pointer;transition:border-color .15s;}
#view-lectures .lx-row:hover{border-color:var(--accent);}
#view-lectures .lx-row-main{display:grid;gap:2px;min-width:0;}
#view-lectures .lx-row-main b{font-size:15px;font-weight:800;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
#view-lectures .lx-row-main small{color:var(--ink-faint);font-size:12px;}
#view-lectures .lx-row-meta{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;font-size:12px;font-weight:700;color:var(--ink-soft);}
#view-lectures .lx-row-meta span{padding:2px 8px;border-radius:7px;background:color-mix(in srgb,var(--ink-faint) 12%,transparent);}
#view-lectures .lx-row-meta .warn{background:color-mix(in srgb,var(--amber) 18%,transparent);color:var(--amber);}
#view-lectures .lx-row-meta .due{background:var(--accent-soft);color:var(--accent);}
#view-lectures .lx-row-meta .bad{background:color-mix(in srgb,var(--rose) 14%,transparent);color:var(--rose);}
#view-lectures .lx-row-meta .faint{opacity:.7;}

/* lecture */
#view-lectures .lx-lec-head{display:flex;align-items:flex-start;gap:14px;}
#view-lectures .lx-drop{display:grid;justify-items:center;gap:4px;padding:26px 16px;border:2px dashed var(--line-strong);border-radius:14px;background:color-mix(in srgb,var(--paper) 60%,var(--card));cursor:pointer;text-align:center;transition:border-color .15s,background .15s;}
#view-lectures .lx-drop:hover,#view-lectures .lx-drop.over{border-color:var(--accent);background:var(--accent-soft);}
#view-lectures .lx-drop-ico{font-size:26px;color:var(--accent);line-height:1;}
#view-lectures .lx-drop b{font-size:15px;}
#view-lectures .lx-drop small{color:var(--ink-faint);font-size:12px;}
#view-lectures .lx-progress{display:grid;grid-template-columns:auto 1fr;gap:6px 10px;align-items:center;margin-top:12px;font-size:13px;color:var(--ink-soft);}
#view-lectures .lx-progress .lx-bar{grid-column:1/-1;}
#view-lectures .lx-bar{height:8px;border-radius:999px;background:color-mix(in srgb,var(--ink-faint) 16%,transparent);overflow:hidden;}
#view-lectures .lx-bar i{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .25s;}
#view-lectures .lx-bar.thin{height:4px;margin-top:8px;}
#view-lectures .lx-thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin-top:14px;}
#view-lectures .lx-thumbs.small{grid-template-columns:repeat(auto-fill,minmax(90px,1fr));}
#view-lectures .lx-thumb{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--paper-2);padding:0;cursor:zoom-in;aspect-ratio:4/3;display:block;}
#view-lectures .lx-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
#view-lectures .lx-thumb span{position:absolute;left:6px;bottom:6px;font-size:11px;font-weight:800;padding:1px 7px;border-radius:6px;background:rgba(0,0,0,.55);color:#fff;}
#view-lectures .lx-x{appearance:none;border:0;background:color-mix(in srgb,var(--ink-faint) 14%,transparent);color:var(--ink-soft);width:26px;height:26px;border-radius:8px;font-size:18px;line-height:1;cursor:pointer;display:grid;place-items:center;}
#view-lectures .lx-x:hover{background:var(--rose);color:var(--lx-on-accent);}
#view-lectures .lx-thumb .lx-x{position:absolute;right:4px;top:4px;}
#view-lectures #lxNotes{min-height:150px;margin-top:8px;}
#view-lectures .lx-notes-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:8px;flex-wrap:wrap;}
#view-lectures .lx-notes-btns{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
#view-lectures .lx-loading{display:flex;align-items:center;gap:12px;color:var(--ink-soft);font-size:15px;justify-content:center;padding:28px;}
#view-lectures .lx-loading.inline{padding:6px 0;justify-content:flex-start;}
#view-lectures .lx-spin{width:18px;height:18px;border-radius:50%;border:2px solid var(--accent-soft);border-top-color:var(--accent);animation:lxspin .8s linear infinite;flex:0 0 18px;}
@keyframes lxspin{to{transform:rotate(360deg);}}

/* review */
/* --lx-top = measured height of the site's sticky .desktop-topbar (z-index 45) so the bar never slides underneath it */
#view-lectures .lx-sticky{position:sticky;top:calc(var(--lx-top,0px) + 8px);z-index:5;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:color-mix(in srgb,var(--card) 92%,var(--paper));backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:14px;padding:10px 14px;box-shadow:var(--shadow);font-size:14px;color:var(--ink-soft);}
#view-lectures .lx-sticky .lx-actions{margin:0;}
/* V6.7.12：抽卡密度选择器 / 考后保温状态芯片 */
#view-lectures .lx-density{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--ink-faint);}
#view-lectures .lx-density select{width:auto;padding:6px 8px;font-size:13px;}
/* 审查修：cute-pink 上 amber-ink 只有 3.3:1，改成 45% 琥珀 + 墨色（≈5:1）；.lx-chip 本身无边框，所以要写完整 border */
#view-lectures .lx-chip.maint{background:color-mix(in srgb,var(--amber) 18%,var(--card));color:color-mix(in srgb,var(--amber) 45%,var(--ink));border:1px solid color-mix(in srgb,var(--amber) 50%,var(--line));}
#view-lectures .lx-maint{margin-top:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
#view-lectures .lx-sticky-spacer{display:none;}   /* V6.7.11：只在手机上（.lx-sticky 变 fixed 时）才占位 */
#view-lectures .lx-rlist{display:grid;gap:10px;}
#view-lectures .lx-rcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px 14px 12px;display:grid;gap:8px;box-shadow:var(--shadow);}
#view-lectures .lx-rcard.starred{border-color:color-mix(in srgb,var(--amber) 55%,var(--line));}
#view-lectures .lx-rcard.approved{background:color-mix(in srgb,var(--card) 88%,var(--accent-soft));}
#view-lectures .lx-rcard-top{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
#view-lectures .lx-type,#view-lectures .lx-page{width:auto;padding:4px 8px;font-size:12px;font-weight:700;border-radius:8px;}
/* the control the "a figure card needs a slide page" toast points at — flashes so the user sees where to look */
#view-lectures .lx-need{border-color:var(--amber)!important;box-shadow:0 0 0 3px color-mix(in srgb,var(--amber) 26%,transparent)!important;}
#view-lectures .lx-star{appearance:none;border:0;background:transparent;font-size:22px;line-height:1;color:var(--ink-faint);cursor:pointer;padding:0 4px;}
#view-lectures .lx-star.on,#view-lectures .lx-star:hover{color:var(--lx-amber-ink);}
#view-lectures textarea.lx-q{font-size:17px;font-weight:700;line-height:1.4;min-height:44px;font-family:var(--serif);}
#view-lectures textarea.lx-a{font-size:14px;min-height:56px;}
#view-lectures .lx-hint{font-size:13px;color:var(--ink-soft);}
#view-lectures .lx-why{font-size:12px;color:var(--ink-faint);line-height:1.5;}

/* session */
#view-lectures .lx-session{display:grid;gap:14px;max-width:820px;margin:0 auto;width:100%;}
#view-lectures .lx-sess-top{display:grid;gap:6px;}
#view-lectures .lx-sess-prog{font-size:14px;color:var(--ink-soft);display:flex;align-items:center;gap:8px;}
#view-lectures .lx-sess-prog b{font-size:22px;color:var(--ink);}
#view-lectures .lx-sess-where{font-size:13px;color:var(--ink-faint);}
#view-lectures .lx-qcard{padding:30px 32px 26px;display:grid;gap:18px;}
#view-lectures .lx-question{font-family:var(--serif);font-size:28px;line-height:1.35;font-weight:600;color:var(--ink);letter-spacing:-.005em;}
#view-lectures .lx-figure,#view-lectures .lx-pagethumb{appearance:none;border:1px solid var(--line);border-radius:12px;background:var(--paper-2);padding:0;overflow:hidden;cursor:zoom-in;display:grid;justify-items:center;}
#view-lectures .lx-figure img{max-width:100%;max-height:440px;display:block;}
#view-lectures .lx-figure span,#view-lectures .lx-pagethumb span{font-size:12px;color:var(--ink-faint);padding:6px;}
#view-lectures .lx-pagethumb{width:180px;margin-top:10px;}
#view-lectures .lx-pagethumb img{width:100%;display:block;}
#view-lectures .lx-answer{border-top:1px dashed var(--line-strong);padding-top:16px;display:grid;gap:8px;}
#view-lectures .lx-answer-text{font-size:19px;line-height:1.55;color:var(--ink);}
#view-lectures .lx-hintline{font-size:14px;color:var(--ink-soft);line-height:1.5;}
#view-lectures .lx-hintline b{color:var(--ink-faint);font-size:12px;letter-spacing:.06em;text-transform:uppercase;margin-right:6px;}
#view-lectures .lx-typed{display:grid;gap:8px;border:1px solid color-mix(in srgb,var(--amber) 45%,var(--line));border-radius:14px;padding:12px 14px;background:color-mix(in srgb,var(--amber) 6%,var(--card));}
#view-lectures .lx-typed.lx-typed-done{background:transparent;border-color:var(--line);}
#view-lectures .lx-typed textarea{background:var(--card);}
#view-lectures .lx-typed-text{font-size:15px;line-height:1.5;color:var(--ink-soft);white-space:pre-wrap;}
#view-lectures .lx-grade{border-radius:12px;padding:10px 12px;font-size:14px;line-height:1.5;display:grid;gap:4px;background:color-mix(in srgb,var(--ink-faint) 10%,transparent);}
#view-lectures .lx-grade.correct{background:var(--accent-soft);color:var(--ink);}
#view-lectures .lx-grade.partial{background:color-mix(in srgb,var(--amber) 16%,transparent);}
#view-lectures .lx-grade.incorrect{background:color-mix(in srgb,var(--rose) 12%,transparent);}
#view-lectures .lx-grade-head{display:flex;justify-content:space-between;font-weight:800;}
#view-lectures .lx-grade ul{margin:2px 0 0 18px;padding:0;}
#view-lectures .lx-rate{display:grid;gap:10px;border-top:1px dashed var(--line-strong);padding-top:14px;}
#view-lectures .lx-rate-btns{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
#view-lectures .lx-btn.rate{justify-content:center;padding:14px 10px;font-size:16px;border-radius:14px;border-width:2px;}
#view-lectures .lx-btn.rate.forgot{border-color:color-mix(in srgb,var(--rose) 45%,var(--line));color:var(--rose);}
#view-lectures .lx-btn.rate.fuzzy{border-color:color-mix(in srgb,var(--amber) 55%,var(--line));color:var(--amber);}
#view-lectures .lx-btn.rate.got{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));color:var(--accent);}
#view-lectures .lx-btn.rate.forgot:hover,#view-lectures .lx-btn.rate.forgot.pre{background:var(--rose);border-color:var(--rose);color:var(--lx-on-accent);}
#view-lectures .lx-btn.rate.fuzzy:hover,#view-lectures .lx-btn.rate.fuzzy.pre{background:var(--amber);border-color:var(--amber);color:var(--lx-on-accent);}
#view-lectures .lx-btn.rate.got:hover,#view-lectures .lx-btn.rate.got.pre{background:var(--accent);border-color:var(--accent);color:var(--lx-on-accent);}
#view-lectures .lx-session.exam .lx-qcard{border-color:color-mix(in srgb,var(--terra) 45%,var(--line));}
#view-lectures .lx-exam-n{font-size:22px;margin:8px 0 4px;}
#view-lectures .lx-exam-n b{font-size:34px;color:var(--terra);font-family:var(--serif);}
#view-lectures .lx-tally{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:420px;margin:18px auto 8px;}
#view-lectures .lx-tally div{border-radius:14px;padding:12px;display:grid;gap:2px;border:1px solid var(--line);}
#view-lectures .lx-tally b{font-size:28px;font-family:var(--serif);}
#view-lectures .lx-tally span{font-size:12px;font-weight:700;color:var(--ink-soft);}
#view-lectures .lx-tally .got b{color:var(--accent);}
#view-lectures .lx-tally .fuzzy b{color:var(--amber);}
#view-lectures .lx-tally .forgot b{color:var(--rose);}

/* image modal (appended to body) */
.ws-lect-modal{position:fixed;inset:0;z-index:var(--ws-z-modal,12010);background:rgba(14,12,10,.72);display:grid;place-items:center;padding:24px;cursor:zoom-out;backdrop-filter:blur(3px);}
.ws-lect-modal-box{position:relative;max-width:min(1200px,96vw);max-height:92vh;display:grid;gap:8px;justify-items:center;}
.ws-lect-modal-box img{max-width:100%;max-height:84vh;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.45);background:#fff;}
.ws-lect-modal-cap{color:#fff;font-size:13px;font-weight:700;}
.ws-lect-modal-cap span{opacity:.6;font-weight:500;}
.ws-lect-modal-close{position:absolute;right:-6px;top:-14px;width:34px;height:34px;border-radius:50%;border:0;background:#fff;color:#222;font-size:22px;line-height:1;cursor:pointer;}

/* keyboard hints are noise on a phone (and they made "Got it" wrap to two lines at 390 px) */
@media(pointer:coarse){
  #view-lectures kbd{display:none!important;}
}

/* responsive — 768 px is the site's own phone breakpoint (switchTab uses innerWidth<=768) */
@media(max-width:768px){
  #view-lectures .lx-two,#view-lectures .lx-due,#view-lectures .lx-exam-rows,#view-lectures .lx-form-row{grid-template-columns:1fr;}
  #view-lectures .lx-qcard{padding:20px 18px;}
  #view-lectures .lx-question{font-size:22px;}
  #view-lectures .lx-crumb.current{font-size:16px;}
  #view-lectures .lx-row{flex-direction:column;align-items:flex-start;}
  #view-lectures .lx-row-meta{justify-content:flex-start;}

  /* `.lx` is a grid: an auto track is at least as wide as its widest item's min-content, so one long crumb or an
     unbreakable AI string would push every card past the viewport (measured: a 450 px track in a 346 px column).
     min-width:0 lets the tracks take the available width and the content shrink instead. */
  #view-lectures .lx,#view-lectures .lx>*,#view-lectures .lx-rlist>*,#view-lectures .lx-list>*{min-width:0;}

  /* header: breadcrumbs above the quota line instead of side by side */
  #view-lectures .lx-head{flex-direction:column;align-items:flex-start;gap:2px;}
  #view-lectures .lx-crumbs{width:100%;}
  #view-lectures .lx-crumb{min-height:36px;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  #view-lectures .lx-quota{font-size:11px;}

  /* touch targets */
  #view-lectures .lx-btn{min-height:44px;}
  #view-lectures .lx-btn.small{min-height:44px;padding:8px 14px;}
  #view-lectures .lx-x{width:44px;height:44px;min-height:44px;}
  #view-lectures .lx-thumb .lx-x{width:32px;height:32px;min-height:32px;}
  #view-lectures .lx-star{min-width:44px;min-height:44px;}

  /* iOS zooms into any focused field under 16 px */
  #view-lectures input:not([type=checkbox]),#view-lectures textarea,#view-lectures select{font-size:16px;min-height:44px;}
  #view-lectures textarea{min-height:56px;}
  #view-lectures .lx-type,#view-lectures .lx-page{padding:6px 8px;}

  /* density */
  #view-lectures .lx-due-n{font-size:44px;}
  #view-lectures .lx-grid{grid-template-columns:1fr;}
  #view-lectures .lx-thumbs{grid-template-columns:repeat(auto-fill,minmax(84px,1fr));}
  #view-lectures .lx-figure img{max-height:46vh;}
  #view-lectures .lx-course-head,#view-lectures .lx-lec-head{flex-wrap:wrap;}
  #view-lectures .lx-sticky{padding:8px 10px;gap:8px;font-size:13px;}
  .ws-lect-modal{padding:10px;}
  .ws-lect-modal-close{right:4px;top:4px;}

  /* recall session: the rating bar stays on screen while the question card scrolls.
     `fixed`, not `sticky`: index.html (~38109 / ~42491) sets `html,body{overflow-x:hidden!important}`, which promotes
     body's overflow-y to `auto`; body then is a scrollport whose height equals its content, so it never scrolls and
     every position:sticky descendant is inert on phones (measured — html is the real scroller). A fixed box is laid
     out against the viewport and is unaffected. --lx-bot is measured from the site's fixed tab bar by
     setStickyOffset(); the fallback covers a 64 px bar plus the safe area. */
  /* V6.7.2 修#4: the bar reaches the bottom EDGE of the viewport and keeps the tab-bar clearance in its own padding.
     Parking it at `bottom:var(--lx-bot)` left an uncovered full-width band between the bar and the site's inset tab
     pill, through which the answer text kept scrolling (measured 8 px at 390x844) — it read as a rendering glitch. */
  #view-lectures .lx-session .lx-rate{
    position:fixed;left:0;right:0;bottom:0;z-index:6;
    margin:0;border-top:1px solid var(--line);border-radius:0;gap:8px;
    padding:10px max(12px,env(safe-area-inset-right)) calc(var(--lx-bot,calc(80px + env(safe-area-inset-bottom,0px))) + 12px) max(12px,env(safe-area-inset-left));
    background:color-mix(in srgb,var(--card) 94%,var(--paper));
    backdrop-filter:blur(8px);box-shadow:0 -6px 18px rgba(0,0,0,.10);
  }
  #view-lectures .lx-session .lx-rate>*{width:100%;max-width:430px;margin-left:auto;margin-right:auto;}
  /* V6.7.11：审核页那条 .lx-sticky 犯的是同一个错 —— 它还是 position:sticky，而上面那段注释已经
     说明：手机上 html,body{overflow-x:hidden} 让 body 变成自身高度的滚动容器、从不滚动，
     于是 body 的 sticky 后代**全部失效**。实测 375×812 下滚动 1000px，这条 bar 从 top:18px
     跑到 -982px，把「Approve all / Approve selected (N)」一起带出了屏幕，用户在手机上根本批不了卡。
     照 .lx-rate 的成熟写法改成 fixed，贴顶（审核页没有底部评分条，顶部不与 tab bar 冲突）。 */
  #view-lectures .lx-sticky{
    position:fixed;left:0;right:0;top:var(--lx-top,0px);z-index:7;
    margin:0;border-radius:0;border-left:0;border-right:0;border-top:0;
    padding:10px max(12px,env(safe-area-inset-right)) 10px max(12px,env(safe-area-inset-left));
    box-shadow:0 6px 18px rgba(0,0,0,.10);
  }
  /* fixed 之后它不再占据文档流，用等高占位块把第一张卡让出来（渲染时插在 bar 后面） */
  #view-lectures .lx-sticky-spacer{display:block;height:60px;}
  /* V6.7.11：站点给每个 .view 都加了 `animation:rise .4s`，其 from 帧带 translateY(10px)。
     只要 transform 不是 none，#view-lectures 就成了 fixed 后代的包含块 —— 于是进入课堂后的
     前 400ms 里，评分条是相对这个 view 定位而不是相对视口的，实测落到折线下方 304px，
     用户在这段时间里看不到「记得/模糊/忘了」。课堂页不需要这个入场动画，关掉。 */
  #view-lectures.active{animation:none;}
  /* the static curve/exam explainer under the buttons — it would double the height of a permanently visible bar */
  #view-lectures .lx-session .lx-rate>.lx-muted:last-child{display:none;}
  /* room for the fixed bar; the class is set by renderSession() only while the answer is revealed.
     The bar now runs to the viewport bottom, so its occupied height is --lx-bot + ~102 px (10 top pad + 80 content
     + 12 bottom pad); 126 keeps the same ~24 px of breathing room the flat value used to give. */
  #view-lectures .lx-session.revealed{padding-bottom:calc(var(--lx-bot,80px) + 126px);}
}

/* V6.7.4 当天新学巩固（first pass）—— 用户拍板「上传后的当天应该就安排一次新学巩固，像背单词一样」。
   与 .lx-due 同一套视觉语言，但用 accent-soft 底色区分「今天新学」和「到期复习」。 */
#view-lectures .lx-fresh{display:grid;grid-template-columns:minmax(180px,240px) 1fr;gap:18px;align-items:center;background:var(--lx-accent-soft,var(--accent-soft));border-color:var(--lx-accent-line,var(--line));}
#view-lectures .lx-fresh .lx-due-n{color:var(--lx-accent-ink,var(--accent));}
#view-lectures .lx-fresh-right{min-width:0;}
#view-lectures .lx-fresh-right p{margin:0 0 10px;}
#view-lectures .lx-badge.first{background:var(--lx-accent-ink,var(--accent));color:#fff;}
@media(max-width:768px){
  #view-lectures .lx-fresh{grid-template-columns:1fr;gap:12px;}
}

/* V6.7.7 复习时就地改卡：Answer 标签右侧一个低调的 Edit，点开变成三个输入框。 */
#view-lectures .lx-answer .lx-label{display:flex;align-items:center;justify-content:space-between;gap:10px;}
#view-lectures .lx-edit-btn{border:1px solid var(--line);background:transparent;color:var(--ink-soft);font:inherit;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:999px;cursor:pointer;letter-spacing:.02em;}
#view-lectures .lx-edit-btn:hover{color:var(--lx-accent-ink,var(--accent));border-color:var(--lx-accent-ink,var(--accent));}
#view-lectures .lx-editing .lx-elab{display:block;margin:12px 0 0;font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);}
#view-lectures .lx-editing .lx-elab small{text-transform:none;letter-spacing:0;font-weight:600;opacity:.75;}
#view-lectures .lx-editing textarea{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font:inherit;font-size:15px;line-height:1.55;resize:vertical;}
#view-lectures .lx-editing textarea:focus{outline:none;border-color:var(--lx-accent-ink,var(--accent));}
#view-lectures .lx-editing .lx-actions{margin-top:14px;}
@media(max-width:768px){
  #view-lectures .lx-edit-btn{min-height:32px;padding:6px 12px;}
  #view-lectures .lx-editing textarea{font-size:16px;} /* iOS 下 <16px 会触发自动放大 */
}