/* Course 96525: a shared study-workspace identity. Scoped to the course and its lectures/tools. */
.qm-page {
  --q-bg: #f4f6f4;
  --q-surface: #ffffff;
  --q-text: #183238;
  --q-muted: #52666b;
  --q-line: #dce5df;
  --q-primary: #245e50;
  --q-soft: #e9f0e9;
  --q-lime: #ddf59a;
  --q-purple: #655c94;
  --q-shadow: 0 7px 25px #21382d05;
  --paper: var(--q-bg);
  --white: var(--q-surface);
  --ink: var(--q-text);
  --muted: var(--q-muted);
  --green: var(--q-primary);
  --mint: var(--q-soft);
  --line: var(--q-line);
  --accent: var(--q-primary);
  background: var(--q-bg);
  color: var(--q-text);
  font:
    15px/1.65 "Inter",
    system-ui,
    sans-serif;
}
:root[data-theme="dark"] .qm-page {
  --q-bg: #101e23;
  --q-surface: #172a30;
  --q-text: #eaf3ec;
  --q-muted: #a4bab6;
  --q-line: #30474a;
  --q-primary: #a6d3b0;
  --q-soft: #233c3c;
  --q-shadow: none;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .qm-page {
    --q-bg: #101e23;
    --q-surface: #172a30;
    --q-text: #eaf3ec;
    --q-muted: #a4bab6;
    --q-line: #30474a;
    --q-primary: #a6d3b0;
    --q-soft: #233c3c;
    --q-shadow: none;
  }
}
.qm-page main h1,
.qm-page main h2,
.qm-page main h3,
.qm-page main h4 {
  color: var(--q-text);
  font-family: "Inter", system-ui, sans-serif;
  letter-spacing: -0.035em;
  line-height: 1.2;
}
.qm-page main h1 {
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  font-weight: 650;
}
.qm-page main h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.05rem);
  font-weight: 650;
}
.qm-page main h3 {
  font-size: 1.14rem;
  font-weight: 650;
}
.qm-page main a {
  color: var(--q-primary);
}
.qm-page :focus-visible {
  outline: 3px solid #8177bf;
  outline-offset: 4px;
}
.qm-page .site-header {
  position: relative;
}
.qm-page .site-header.is-compact .header-bar {
  min-height: var(--header-height);
}
.qm-page main.container,
.qm-page main.wrap {
  max-width: 1280px;
  padding: 24px 32px 72px;
}
.qm-page main .back-link,
.qm-page .lecture-breadcrumbs {
  margin-block: 0 16px;
  font-size: 0.78rem;
}
.qm-identity {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 18px 0 26px;
  border-bottom: 1px solid var(--q-line);
  margin-bottom: 24px;
}
.qm-page .qm-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.77rem;
  letter-spacing: 0.09em;
  font-weight: 750;
  color: var(--q-text);
  text-decoration: none;
  line-height: 1.3;
}
.qm-brand small {
  display: block;
  font-size: 0.7rem;
  font-weight: 450;
  letter-spacing: 0.01em;
  color: var(--q-muted);
  margin-top: 6px;
}
.qm-mark {
  width: 43px;
  height: 43px;
  border-radius: 13px;
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 3px;
  padding: 11px;
  background: #173e36;
  flex: 0 0 auto;
}
.qm-mark i {
  width: 5px;
  height: 9px;
  background: var(--q-lime);
  border-radius: 2px;
}
.qm-mark i:nth-child(2) {
  height: 15px;
}
.qm-mark i:nth-child(3) {
  height: 21px;
}
.qm-global-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 0.79rem;
}
.qm-page .qm-global-nav a {
  color: var(--q-muted);
  text-decoration: none;
  padding: 8px 0;
}
.qm-global-nav a[aria-current] {
  color: var(--q-text);
  font-weight: 700;
  border-bottom: 2px solid var(--q-primary);
}
.qm-course-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.qm-page .qm-course-tab {
  display: block;
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--q-muted);
  font-size: 0.8rem;
  text-decoration: none;
}
.qm-page .qm-course-tab[aria-current] {
  color: var(--q-text);
  background: var(--q-surface);
  border-color: var(--q-line);
  box-shadow: var(--q-shadow);
}
.qm-course-tab.qm-library {
  margin-left: auto;
}
.qm-page .qm-course-panel {
  padding: 0;
  margin: 0;
  border: 0;
  box-shadow: none;
  background: transparent;
}
.qm-kicker {
  color: var(--q-muted);
  font-size: 0.65rem;
  letter-spacing: 0.115em;
  font-weight: 700;
  margin-block: 0 13px;
}
.qm-page .qm-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 19px;
  min-height: 44px;
  font:
    600 0.82rem/1.4 "Inter",
    system-ui,
    sans-serif;
  background: #245e50;
  color: white;
  border: 1px solid #245e50;
  border-radius: 10px;
  text-decoration: none;
  cursor: pointer;
  gap: 8px;
}
.qm-page .qm-button.qm-secondary {
  background: var(--q-surface);
  color: var(--q-text);
  border-color: var(--q-line);
}
.qm-button:hover {
  filter: brightness(0.97);
}
.qm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-block: 24px 14px;
}
.qm-page .qm-link {
  font-size: 0.83rem;
  text-decoration: none;
  font-weight: 550;
}
.qm-link:hover {
  text-decoration: underline;
}
.qm-overview-hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-block: 40px;
}
.qm-hero-copy h1 {
  margin-block: 22px 23px;
  letter-spacing: -0.07em;
  line-height: 1.07;
}
.qm-page main h1 em {
  font-style: normal;
  color: var(--q-primary);
}
.qm-hero-copy > p:not(.qm-kicker) {
  max-width: 480px;
}
.qm-lead {
  font-size: 1.1rem;
  font-weight: 550;
  color: var(--q-text);
  line-height: 1.5;
}
.qm-caption {
  font-size: 0.74rem;
  color: var(--q-muted);
  line-height: 1.65;
}
.qm-evidence {
  border-radius: 23px;
  padding: 28px;
  background: #173e36;
  color: #d0ded4;
  position: relative;
  overflow: hidden;
}
.qm-evidence:after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  border: 1px solid #ffffff0c;
  border-radius: 50%;
  right: -170px;
  top: -100px;
  pointer-events: none;
}
.qm-evidence-heading {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}
.qm-evidence .qm-kicker,
.qm-evidence .qm-caption {
  color: #c0d5c6;
}
.qm-page .qm-evidence h3 {
  color: #f8fff4;
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  margin: 12px 0;
}
.qm-evidence p {
  font-size: 0.78rem;
  line-height: 1.7;
}
.qm-live-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.63rem;
  color: #ddf59a;
}
.qm-live-dot:before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ddf59a;
}
.qm-evidence svg {
  display: block;
  width: 100%;
  height: auto;
}
.qm-evidence label {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
}
.qm-evidence input {
  width: 100%;
  accent-color: #ddf59a;
}
.qm-range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.63rem;
}
.qm-demo-results {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 16px;
  border-top: 1px solid #ffffff24;
  padding-top: 18px;
  margin-top: 18px;
}
.qm-demo-results span {
  font-size: 0.57rem;
  letter-spacing: 0.07em;
}
.qm-demo-results strong {
  display: block;
  font-size: 1.12rem;
  font-weight: 550;
  letter-spacing: -0.03em;
  color: white;
  margin-top: 6px;
}
.qm-page .qm-evidence a {
  display: inline-block;
  color: #ddf59a;
  font-size: 0.73rem;
  margin-top: 20px;
}
.qm-evidence .qm-caption {
  font-size: 0.63rem;
  margin-bottom: 0;
}
.qm-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--q-line);
  padding: 24px 0;
  margin-block: 30px 64px;
  gap: 20px;
}
.qm-metric {
  border-right: 1px solid var(--q-line);
  padding-left: 22px;
}
.qm-metric:first-child {
  padding-left: 0;
}
.qm-metric:last-child {
  border: 0;
}
.qm-metric strong {
  display: block;
  font-size: 2rem;
  line-height: 1.3;
  font-weight: 550;
  letter-spacing: -0.06em;
}
.qm-metric span {
  font-size: 0.76rem;
  color: var(--q-muted);
}
.qm-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin: 44px 0 24px;
}
.qm-section-heading p:last-child {
  max-width: 440px;
  font-size: 0.83rem;
  color: var(--q-muted);
}
.qm-section-heading h1,
.qm-section-heading h2 {
  margin: 0;
}
.qm-module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.qm-module {
  padding: 30px;
  border: 1px solid var(--q-line);
  border-radius: 18px;
  background: var(--q-surface);
  box-shadow: var(--q-shadow);
}
.qm-module h3 {
  font-size: 1.5rem;
  margin-block: 10px 16px;
}
.qm-module > p {
  font-size: 0.85rem;
  color: var(--q-muted);
}
.qm-module-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.76rem;
  padding-block: 20px;
}
.qm-availability {
  border-left: 2px solid var(--q-purple);
  padding-left: 14px;
  color: var(--q-muted);
  font-size: 0.8rem;
}
.qm-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-block: 20px;
}
.qm-tags span {
  padding: 5px 9px;
  border-radius: 6px;
  font-size: 0.65rem;
  background: var(--q-soft);
  color: var(--q-text);
}
.qm-path-preview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.qm-lessons-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-block: 24px;
}
.qm-lesson-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--q-line);
  background: var(--q-surface);
  border-radius: 16px;
  box-shadow: var(--q-shadow);
}
.qm-lesson-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  gap: 12px;
}
.qm-lesson-number {
  font-size: 1.7rem;
  font-weight: 450;
  color: var(--q-primary);
  letter-spacing: -0.06em;
}
.qm-status {
  display: inline-block;
  padding: 4px 8px;
  background: var(--q-soft);
  color: var(--q-muted);
  font-size: 0.62rem;
  border-radius: 5px;
}
.qm-status.is-read {
  color: var(--q-primary);
}
.qm-lesson-card .qm-kicker {
  margin-bottom: 8px;
}
.qm-page .qm-lesson-card h3 a {
  color: var(--q-text);
  text-decoration: none;
  font-size: inherit;
}
.qm-page .qm-lesson-card h3 a:hover {
  text-decoration: underline;
}
.qm-lesson-card h3 {
  margin: 0 0 14px;
  font-size: 1.3rem;
}
.qm-lesson-card > p:not(.qm-kicker) {
  font-size: 0.82rem;
  color: var(--q-muted);
}
.qm-lesson-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--q-line);
  margin-top: auto;
}
.qm-outcomes {
  padding-left: 19px;
  font-size: 0.81rem;
  color: var(--q-muted);
  line-height: 1.9;
  margin: 0 0 18px;
}
.qm-outcomes li::marker {
  color: var(--q-primary);
}
.qm-compact h3 {
  font-size: 1.1rem;
}
.qm-compact .qm-lesson-top {
  margin-bottom: 17px;
}
.qm-page .qm-lesson-search {
  max-width: 640px;
  display: block;
  padding: 13px 16px;
  border: 1px solid var(--q-line);
  background: var(--q-surface);
  color: var(--q-text);
  border-radius: 10px;
  font: inherit;
  width: 100%;
}
.qm-search-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 550;
  margin-bottom: 8px;
}
.qm-tool-shelf {
  margin-top: 52px;
  padding: 36px;
  border: 1px solid var(--q-line);
  border-radius: 18px;
  background: var(--q-soft);
}
.qm-tools-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}
.qm-page .qm-tool-card {
  display: block;
  border-radius: 12px;
  padding: 22px;
  background: var(--q-surface);
  border: 1px solid var(--q-line);
  text-decoration: none;
}
.qm-tool-card h3 {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 1.08rem;
}
.qm-tool-card p {
  font-size: 0.8rem;
  color: var(--q-muted);
}
.qm-course-details,
.qm-upcoming {
  padding: 24px 0;
  margin-block: 30px;
  border-block: 1px solid var(--q-line);
}
.qm-course-details summary,
.qm-upcoming summary {
  font-weight: 550;
  cursor: pointer;
}
.qm-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 28px;
}
.qm-detail-grid p {
  font-size: 0.81rem;
  color: var(--q-muted);
}
.qm-upcoming-list {
  margin-top: 22px;
}
.qm-upcoming-list > div {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--q-line);
  font-size: 0.83rem;
}
.qm-upcoming-list > div > span:first-child {
  margin-right: auto;
}
/* Lecture workspace: outcomes at the top, a reading outline, and concept checks within the guide. */
.qm-lecture-page .lecture-sequence {
  display: flex;
  gap: 8px;
  margin-block: 0 20px;
}
.qm-lecture-page .lecture-sequence a {
  background: transparent;
  border: 1px solid var(--q-line);
  border-radius: 7px;
  padding: 6px 10px;
  font-size: 0.71rem;
}
.qm-lecture-page .lecture-sequence a[aria-current] {
  background: var(--q-soft);
  color: var(--q-text);
  border-color: var(--q-primary);
}
.qm-lecture-page .lecture-toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--q-bg);
  border-block: 1px solid var(--q-line);
  padding: 12px 0;
}
.qm-lecture-page .lecture-toolbar .eyebrow {
  color: var(--q-muted);
  font-size: 0.65rem;
}
.qm-lecture-page .nav {
  gap: 6px;
  background: var(--q-surface);
  padding: 5px;
  border: 1px solid var(--q-line);
  border-radius: 10px;
}
.qm-lecture-page .nav button {
  background: transparent;
  color: var(--q-muted);
  border-radius: 6px;
  font-size: 0.73rem;
  padding: 8px 15px;
}
.qm-lecture-page .nav button[aria-current] {
  color: white;
  background: #245e50;
}
.qm-lecture-page .qm-lesson-hero,
.qm-lecture-page .qm-lesson-hero.no-visual {
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  padding: 45px 0 28px;
}
.qm-lecture-page .hero h1 {
  font-size: clamp(2rem, 3.6vw, 3.3rem);
  line-height: 1.13;
  letter-spacing: -0.05em;
  margin-bottom: 20px;
}
.qm-lecture-page .hero .eyebrow {
  font-size: 0.7rem;
  color: var(--q-muted);
  margin-block: 18px 12px;
}
.qm-lecture-page .hero .lead {
  max-width: 600px;
  color: var(--q-muted);
  font-size: 0.93rem;
  line-height: 1.75;
}
.qm-lecture-page .pill {
  background: var(--q-soft);
  color: var(--q-primary);
  border: 0;
  font-size: 0.65rem;
}
.qm-lecture-page .qm-outcome-card {
  padding: 30px;
  border: 1px solid var(--q-line);
  border-radius: 18px;
  background: var(--q-soft);
  position: relative;
}
.qm-outcome-card h2 {
  font-size: 1.25rem;
  max-width: 290px;
}
.qm-outcome-card ul {
  padding-left: 20px;
  font-size: 0.83rem;
  color: var(--q-muted);
  line-height: 1.9;
  margin-bottom: 24px;
}
.qm-outcome-card .qm-lesson-number {
  font-size: 2.5rem;
  line-height: 1;
}
.qm-lecture-page .btn {
  background: #245e50;
  color: white;
  border: 1px solid #245e50;
  border-radius: 9px;
  padding: 12px 18px;
  font:
    550 0.82rem "Inter",
    system-ui,
    sans-serif;
}
.qm-lecture-page .btn.secondary {
  background: var(--q-surface);
  color: var(--q-text);
  border-color: var(--q-line);
}
.qm-lecture-page .lecture-study-actions {
  border-block: 1px solid var(--q-line);
  background: transparent;
  padding: 18px 0;
  margin-block: 16px;
}
.qm-lecture-page .lecture-notice {
  background: transparent;
  padding: 12px 0;
  border: 0;
  font-size: 0.7rem;
  color: var(--q-muted);
}
.qm-reading-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin-block: 30px;
}
.qm-outline {
  position: sticky;
  top: 90px;
  padding-top: 28px;
}
.qm-outline summary {
  color: var(--q-text);
  font-size: 0.78rem;
  font-weight: 650;
  cursor: pointer;
  margin-bottom: 16px;
}
.qm-outline nav {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.qm-page .qm-outline-link {
  display: block;
  font-size: 0.72rem;
  padding: 8px 12px;
  border-left: 2px solid var(--q-line);
  text-decoration: none;
  color: var(--q-muted);
  line-height: 1.55;
}
.qm-outline-link:hover {
  background: var(--q-soft);
}
.qm-outline-tools {
  border-top: 1px solid var(--q-line);
  margin-top: 25px;
  padding-top: 20px;
}
.qm-outline-tools a {
  display: block;
  font-size: 0.72rem;
  margin-bottom: 12px;
}
.qm-lecture-page .section-intro {
  display: block;
  margin-top: 30px;
  scroll-margin-top: 16px;
}
.qm-lecture-page .section-intro h2 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}
.qm-lecture-page .section-intro p {
  font-size: 0.84rem;
  max-width: 640px;
  color: var(--q-muted);
}
.qm-lecture-page .card {
  padding: 24px;
  background: var(--q-surface);
  border-color: var(--q-line);
  border-radius: 14px;
  box-shadow: var(--q-shadow);
}
.qm-lecture-page .card p {
  color: var(--q-muted);
  font-size: 0.86rem;
}
.qm-lecture-page .card .badge {
  border-radius: 9px;
  background: var(--q-soft);
  color: var(--q-primary);
  font-family: "Inter", sans-serif;
}
.qm-lecture-page .concept:hover,
.qm-lecture-page .concept[aria-expanded="true"] {
  background: var(--q-soft);
}
.qm-lecture-page .grid3 {
  gap: 12px;
}
.qm-lecture-page .grid3 .card {
  padding: 19px;
}
.qm-lecture-page .card h3 {
  font-size: 1rem;
}
.qm-concept-check {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  border: 1px solid var(--q-line);
  border-left: 3px solid var(--q-primary);
  background: var(--q-soft);
  border-radius: 12px;
  padding: 19px 22px;
  margin-block: 26px;
}
.qm-concept-check .qm-kicker {
  margin-bottom: 6px;
}
.qm-concept-check p {
  font-size: 0.8rem;
  margin: 0;
}
.qm-concept-check button {
  flex-shrink: 0;
}
.qm-lesson-next {
  padding: 30px;
  margin-top: 40px;
  background: var(--q-soft);
  border-radius: 16px;
}
.qm-next-links {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 20px;
  margin-top: 24px;
  border-top: 1px solid var(--q-line);
  font-size: 0.8rem;
}
.qm-lecture-page .cta {
  background: var(--q-surface);
  border: 1px solid var(--q-line);
  border-radius: 14px;
  padding: 24px;
  margin-top: 26px;
}
.qm-lecture-page .cta h2 {
  font-size: 1.4rem;
  color: var(--q-text);
}
.qm-lecture-page .cta p {
  color: var(--q-muted);
}
.qm-lecture-page .page-head {
  margin-block: 32px;
}
.qm-lecture-page .page-head h1 {
  font-size: 2.3rem;
}
.qm-lecture-page .page-head p {
  font-size: 0.87rem;
}
.qm-lecture-page .quiz-layout {
  grid-template-columns: 240px minmax(0, 1fr);
  margin-block: 28px;
}
.qm-lecture-page .quiz-side {
  background: var(--q-surface);
  border: 1px solid var(--q-line);
  border-radius: 14px;
  top: 90px;
}
.qm-lecture-page .question-map button {
  border-radius: 6px;
  background: var(--q-soft);
  color: var(--q-text);
}
.qm-lecture-page .quiz-card {
  background: var(--q-surface);
  border: 1px solid var(--q-line);
  box-shadow: var(--q-shadow);
}
.qm-lecture-page .option {
  background: var(--q-surface);
  border-color: var(--q-line);
  border-radius: 10px;
}
.qm-lecture-page .option.correct-option {
  background: var(--q-soft);
}
.qm-lecture-page .option-letter {
  font-family: "Inter", sans-serif;
  color: var(--q-primary);
}
.qm-lecture-page .answer-feedback {
  background: var(--q-soft);
  color: var(--q-text);
  border-color: var(--q-primary);
}
.qm-lecture-page .formula {
  background: var(--q-soft);
  color: var(--q-text);
  border: 1px solid var(--q-line);
  border-radius: 9px;
}
.qm-lecture-page .note {
  color: var(--q-muted);
}
/* Study tools: stable sidebar on desktop; a compact scrolling tool switcher on phones. */
.qm-study-page .study-main {
  padding-top: 24px;
}
.qm-study-page .study-main > p:first-of-type {
  font-size: 0.74rem;
}
.qm-study-page .study-hero {
  padding: 32px 38px;
  background: var(--q-surface);
  color: var(--q-text);
  border: 1px solid var(--q-line);
  border-radius: 18px;
  position: relative;
  overflow: hidden;
  margin-block: 24px 32px;
}
.qm-study-page .study-hero:after {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border: 40px solid var(--q-soft);
  border-radius: 50%;
  right: 45px;
  top: -10px;
  opacity: 0.65;
  pointer-events: none;
}
.qm-study-page .study-hero > * {
  position: relative;
  z-index: 1;
}
.qm-study-page .study-hero h1 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  max-width: 700px;
  margin-block: 14px 18px;
}
.qm-study-page .study-hero p {
  max-width: 600px;
  color: var(--q-muted);
  font-size: 0.88rem;
}
.qm-study-page .study-hero .study-kicker {
  font-size: 0.67rem;
  letter-spacing: 0.09em;
}
.qm-study-page #study-content {
  display: grid;
  grid-template-columns: 185px minmax(0, 1fr);
  gap: 12px 32px;
  align-items: start;
}
.qm-study-context {
  grid-column: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--q-line);
  padding-bottom: 20px;
  margin-bottom: 6px;
}
.qm-study-context label {
  font-size: 0.7rem;
  font-weight: 600;
}
.qm-study-context > div {
  min-width: 220px;
}
.qm-study-context p {
  font-size: 0.74rem;
  color: var(--q-muted);
  max-width: 350px;
}
.qm-study-page .study-nav {
  grid-column: 1;
  grid-row: 1 / span 4;
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
}
.qm-study-page .study-nav a {
  background: transparent;
  color: var(--q-muted);
  border: 0;
  border-radius: 9px;
  padding: 12px 15px;
  font-size: 0.79rem;
  text-decoration: none;
}
.qm-study-page .study-nav a[aria-current] {
  background: #245e50;
  color: white;
}
.qm-study-page #study-view,
.qm-study-page #storage-warning,
.qm-study-page #session-banner {
  grid-column: 2;
  min-width: 0;
}
.qm-study-page .study-heading {
  margin-block: 18px 24px;
}
.qm-study-page .study-heading h2 {
  font-size: 1.7rem;
}
.qm-study-page .study-heading p {
  font-size: 0.84rem;
  color: var(--q-muted);
}
.qm-study-page .study-button {
  background: #245e50;
  color: white;
  border-color: #245e50;
  border-radius: 9px;
  font-size: 0.8rem;
}
.qm-study-page .study-button.secondary {
  background: var(--q-surface);
  color: var(--q-text);
  border-color: var(--q-line);
}
.qm-study-page .study-hero .study-button {
  background: #245e50;
  color: white;
}
.qm-study-page .study-card {
  background: var(--q-surface);
  border-color: var(--q-line);
  box-shadow: var(--q-shadow);
  border-radius: 14px;
  padding: 24px;
}
.qm-study-page .study-card h3 {
  font-size: 1rem;
  line-height: 1.5;
}
.qm-study-page .study-card p,
.qm-study-page .study-card li {
  font-size: 0.84rem;
  color: var(--q-muted);
}
.qm-study-page .study-stats .study-card {
  padding: 16px;
}
.qm-study-page .study-stats .study-card span {
  font-size: 0.65rem;
  line-height: 1.5;
  display: block;
}
.qm-study-page .study-number {
  font-size: 1.55rem;
  letter-spacing: -0.05em;
  font-weight: 550;
}
.qm-study-page .study-meta {
  color: var(--q-muted);
  font-size: 0.72rem;
}
.qm-study-page .study-feedback,
.qm-study-page .study-choice:has(input:checked) {
  background: var(--q-soft);
  color: var(--q-text);
}
.qm-study-page .study-notice {
  background: var(--q-soft);
  border-color: var(--q-line);
  font-size: 0.8rem;
}
.qm-study-page .study-footnote {
  margin-top: 32px;
}
.qm-study-page .study-footnote p {
  font-size: 0.73rem;
}
.qm-study-page input:not([type="checkbox"]):not([type="radio"]),
.qm-study-page select,
.qm-study-page textarea {
  background: var(--q-bg);
  color: var(--q-text);
  border-color: var(--q-line);
  font-size: 0.84rem;
}
.qm-study-page .study-choice {
  border-color: var(--q-line);
  font-size: 0.88rem;
}
.qm-study-page .study-question legend {
  font-size: 1.13rem;
  line-height: 1.65;
  letter-spacing: -0.025em;
}
.qm-study-page .study-map {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.qm-study-page .study-map button {
  background: var(--q-surface);
  border-color: var(--q-line);
  color: var(--q-text);
  padding: 18px;
  font-size: 0.8rem;
}
.qm-study-page .study-map small {
  font-size: 0.67rem;
  color: var(--q-muted);
}
.qm-study-page .study-formula,
.qm-study-page .study-card pre {
  background: var(--q-soft);
  color: var(--q-text);
  font-size: 0.86rem;
}
.qm-study-page .study-jump button {
  background: var(--q-surface);
  color: var(--q-text);
  border-color: var(--q-line);
}
.qm-study-page .study-jump button[data-answered="true"] {
  background: var(--q-soft);
}
.qm-study-page .qm-filter-empty {
  margin-block: 20px;
}
.qm-study-page .qm-filter-link {
  margin-top: 16px;
  display: inline-block;
  font-size: 0.78rem;
}
@media (max-width: 1000px) {
  .qm-overview-hero {
    gap: 32px;
  }
  .qm-identity {
    align-items: start;
  }
  .qm-global-nav {
    gap: 15px;
  }
  .qm-reading-layout {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 25px;
  }
  .qm-lecture-page .grid3 {
    grid-template-columns: 1fr;
  }
  .qm-lecture-page .qm-lesson-hero,
  .qm-lecture-page .qm-lesson-hero.no-visual {
    gap: 30px;
  }
  .qm-study-page #study-content {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 12px 20px;
  }
  .qm-study-page .study-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 800px) {
  .qm-page main.container,
  .qm-page main.wrap {
    padding: 18px 20px 50px;
  }
  .qm-identity {
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 18px;
  }
  .qm-global-nav {
    width: 100%;
    gap: 22px;
    font-size: 0.72rem;
  }
  .qm-overview-hero {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-block: 26px;
  }
  .qm-hero-copy h1 {
    font-size: 3.1rem;
  }
  .qm-hero-copy > p:not(.qm-kicker) {
    max-width: 600px;
  }
  .qm-evidence {
    padding: 26px;
  }
  .qm-metrics {
    margin-bottom: 38px;
    gap: 12px;
  }
  .qm-metric {
    padding-left: 10px;
  }
  .qm-metric strong {
    font-size: 1.55rem;
  }
  .qm-metric span {
    font-size: 0.65rem;
  }
  .qm-module-grid,
  .qm-lessons-grid {
    grid-template-columns: 1fr;
  }
  .qm-path-preview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .qm-section-heading {
    flex-direction: column;
    align-items: start;
    gap: 12px;
  }
  .qm-course-tabs {
    gap: 2px;
  }
  .qm-course-tab.qm-library {
    margin-left: 0;
  }
  .qm-reading-layout {
    display: block;
  }
  .qm-outline {
    position: static;
    border-block: 1px solid var(--q-line);
    padding-block: 16px;
    margin-bottom: 20px;
  }
  .qm-outline-tools {
    display: none;
  }
  .qm-lecture-page .qm-lesson-hero,
  .qm-lecture-page .qm-lesson-hero.no-visual {
    grid-template-columns: 1fr;
    padding-top: 28px;
    gap: 24px;
  }
  .qm-lecture-page .hero h1 {
    font-size: 2.5rem;
  }
  .qm-lecture-page .qm-outcome-card {
    padding: 24px;
  }
  .qm-outcome-card .qm-lesson-number {
    position: absolute;
    right: 24px;
    top: 20px;
    font-size: 1.5rem;
  }
  .qm-outcome-card ul {
    margin-bottom: 0;
  }
  .qm-outcome-card h2 {
    max-width: 85%;
  }
  .qm-lecture-page .lecture-toolbar {
    gap: 10px;
  }
  .qm-lecture-page .lecture-toolbar .eyebrow {
    display: none;
  }
  .qm-lecture-page .nav {
    width: 100%;
  }
  .qm-lecture-page .nav button {
    flex: 1;
    padding: 8px 10px;
  }
  .qm-concept-check {
    flex-direction: column;
    align-items: start;
    gap: 15px;
  }
  .qm-lecture-page .quiz-layout {
    grid-template-columns: 1fr;
  }
  .qm-lecture-page .quiz-side {
    position: static;
  }
  .qm-study-page #study-content {
    display: block;
  }
  .qm-study-page .study-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    position: sticky;
    top: 0;
    z-index: 25;
    padding: 10px 0;
    margin: 8px 0 18px;
    background: var(--q-bg);
    border-block: 1px solid var(--q-line);
  }
  .qm-study-page .study-nav a {
    flex-shrink: 0;
    padding: 9px 12px;
    font-size: 0.73rem;
  }
  .qm-study-context {
    gap: 12px;
  }
  .qm-study-context p {
    max-width: 250px;
  }
  .qm-study-page .study-hero {
    padding: 26px;
  }
  .qm-study-page .study-hero:after {
    right: -120px;
    opacity: 0.35;
  }
  .qm-study-page .study-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (max-width: 540px) {
  .qm-page main.container,
  .qm-page main.wrap {
    padding-inline: 16px;
  }
  .qm-global-nav {
    justify-content: space-between;
    gap: 10px;
  }
  .qm-brand {
    font-size: 0.69rem;
  }
  .qm-hero-copy h1 {
    font-size: 2.65rem;
  }
  .qm-hero-copy .qm-lead {
    font-size: 0.95rem;
  }
  .qm-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .qm-metric {
    border: 0 !important;
    padding-left: 0;
  }
  .qm-path-preview,
  .qm-tools-grid,
  .qm-detail-grid {
    grid-template-columns: 1fr;
  }
  .qm-tool-shelf,
  .qm-module {
    padding: 23px;
  }
  .qm-section-heading {
    margin-top: 34px;
  }
  .qm-page .qm-course-tab {
    font-size: 0.73rem;
    padding: 8px 10px;
  }
  .qm-upcoming-list > div {
    flex-wrap: wrap;
    gap: 10px;
  }
  .qm-module-meta {
    flex-direction: column;
    gap: 5px;
  }
  .qm-evidence-heading {
    gap: 8px;
  }
  .qm-kicker {
    font-size: 0.6rem;
  }
  .qm-evidence .qm-kicker {
    font-size: 0.58rem;
  }
  .qm-live-dot {
    font-size: 0.6rem;
  }
  .qm-demo-results strong {
    font-size: 1rem;
  }
  .qm-lecture-page .hero h1 {
    font-size: 2rem;
  }
  .qm-lecture-page .hero .lead {
    font-size: 0.86rem;
  }
  .qm-lecture-page .lecture-sequence {
    gap: 5px;
    flex-wrap: wrap;
  }
  .qm-lecture-page .lecture-sequence a {
    font-size: 0.65rem;
  }
  .qm-lecture-page .section-intro h2 {
    font-size: 1.4rem;
  }
  .qm-lecture-page .card {
    padding: 20px;
  }
  .qm-lecture-page .quiz-card {
    padding: 20px;
  }
  .qm-lecture-page .quiz-side {
    padding: 18px;
  }
  .qm-lesson-next {
    padding: 23px;
  }
  .qm-study-context {
    display: block;
  }
  .qm-study-context p {
    max-width: none;
    margin-block: 10px 0;
  }
  .qm-study-page .study-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .qm-study-page .study-card {
    padding: 20px;
  }
  .qm-study-page .study-hero h1 {
    font-size: 2.2rem;
  }
  .qm-study-page .study-map {
    grid-template-columns: 1fr;
  }
  .qm-study-page .study-heading h2 {
    font-size: 1.45rem;
  }
  .qm-study-page .study-controls > div {
    width: 100%;
  }
}
.qm-page [hidden] {
  display: none !important;
}
@media (prefers-reduced-motion: reduce) {
  .qm-page,
  .qm-page * {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

/* Match the shared Hub logo rather than inheriting the original lecture mark. */
.qm-lecture-page .site-header .brand-mark {
  background: transparent;
  color: var(--color-brand);
  box-shadow: none;
}

.qm-lecture-page #lecture-guide .card p {
  font-size: 0.94rem;
  line-height: 1.75;
}