/* ==========================================================================
   AI-Native Course — styles
   Editorial / academic feel rooted in Theme tokens.
   ========================================================================== */

* { box-sizing: border-box; }

/* ------------------------------------------------------------------
   Contrast overrides — darken the tertiary ink so muted labels
   (mod codes, section headers, edition, crumbs, durations) clear
   WCAG AA (>=4.5:1) on the light page/sidebar surfaces. The base
   token (#8A8D91) only reached ~3.3:1. #696C73 clears 4.5:1 not just
   on white but on the gray-100 (#F0F2F5) sidebar hover background and
   the blue-50 (#E7F3FF) active background too.
   ------------------------------------------------------------------ */
:root {
  --fg-3: #696C73;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-base);
  color: var(--fg-1);
  background: var(--team-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button { font-family: inherit; cursor: pointer; }

/* Visible keyboard focus across all interactive elements */
a:focus-visible,
button:focus-visible,
textarea:focus-visible,
input:focus-visible,
[role="radio"]:focus-visible,
[role="progressbar"]:focus-visible {
  outline: 2px solid var(--team-blue);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ============================================================
   Layout shell
   ============================================================ */

.course-app {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.course-app--single {
  grid-template-columns: 1fr;
}

/* ============================================================
   Sidebar
   ============================================================ */

.crs-side {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  background: #fcfcfd;
  border-right: var(--border);
  padding: 24px 0 24px 0;
  display: flex;
  flex-direction: column;
}

.crs-side__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 24px 16px;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--fg-2);
  text-decoration: none;
  transition: var(--ease);
}
.crs-side__back:hover { color: var(--team-blue); text-decoration: none; }
.crs-side__back-arrow { font-size: 13px; line-height: 1; }
.crs-side__back:hover .crs-side__back-arrow { transform: translateX(-2px); }

.crs-side__brand {
  padding: 0 24px 20px;
  border-bottom: var(--border);
  margin-bottom: 16px;
}

.crs-side__edition {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.crs-side__title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg-1);
  line-height: 1.3;
}

.crs-side__home {
  display: block;
  padding: 8px 24px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-bottom: 4px;
}

.crs-side__home:hover { color: var(--fg-1); background: var(--bg-hover); }
.crs-side__home.is-active { color: var(--team-blue-hover); border-left-color: var(--team-blue); background: var(--team-blue-50); }

.crs-side__section {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fg-3);
  text-transform: uppercase;
  padding: 14px 24px 6px;
}

.crs-side__mod {
  display: block;
  padding: 9px 24px 9px 24px;
  text-decoration: none;
  color: var(--fg-strong);
  border-left: 2px solid transparent;
  font-size: 13px;
  line-height: 1.3;
  position: relative;
}

.crs-side__mod-row {
  display: flex;
  gap: 10px;
  align-items: baseline;
}

.crs-side__mod-code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
  min-width: 28px;
}

.crs-side__mod-name {
  font-weight: 500;
}

.crs-side__mod:hover { background: var(--bg-hover); color: var(--fg-1); }
.crs-side__mod.is-active {
  color: var(--team-blue-hover);
  border-left-color: var(--team-blue);
  background: var(--team-blue-50);
}
.crs-side__mod.is-active .crs-side__mod-code { color: var(--team-blue-hover); }

.crs-side__progress {
  margin-top: auto;
  padding: 16px 24px;
  border-top: var(--border);
  font-size: 12px;
  color: var(--fg-2);
}

.crs-side__progress-bar {
  margin-top: 8px;
  height: 4px;
  background: var(--team-gray-200);
  border-radius: 2px;
  overflow: hidden;
}
.crs-side__progress-fill {
  height: 100%;
  background: var(--team-blue);
  transition: width 0.4s ease;
}

.crs-side__progress-num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--fg-1);
}

/* ============================================================
   Main content area
   ============================================================ */

.crs-main {
  min-width: 0;
  background: var(--team-white);
}

.crs-main__inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 64px 120px;
}

@media (max-width: 900px) {
  .course-app { grid-template-columns: 1fr; }
  .crs-side { position: static; height: auto; }
  .crs-main__inner { padding: 32px 24px 80px; }
}

/* ============================================================
   Course home — hero + overview
   ============================================================ */

.crs-hero {
  padding-bottom: 48px;
  border-bottom: var(--border);
  margin-bottom: 48px;
}

.crs-hero__edition {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--team-blue);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 600;
}

.crs-hero__title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  color: var(--fg-1);
}

.crs-hero__sub {
  font-size: 19px;
  line-height: 1.5;
  color: var(--fg-2);
  max-width: 640px;
  margin: 0 0 32px;
}

.crs-hero__meta {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.crs-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.crs-hero__meta-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--fg-1);
  letter-spacing: -0.02em;
}

.crs-hero__meta-label {
  font-size: 12px;
  color: var(--fg-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.crs-hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  background: var(--team-blue);
  color: var(--fg-on-blue);
  border: none;
  border-radius: var(--r-md);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  margin-top: 32px;
  transition: var(--ease);
}
.crs-hero__cta:hover { background: var(--team-blue-hover); }
.crs-hero__cta-arrow {
  font-family: var(--font-mono);
  font-weight: 400;
}

/* ============================================================
   Outcomes section
   ============================================================ */

.crs-section-h {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-2);
  text-transform: uppercase;
  margin: 0 0 16px;
  font-weight: 600;
}

.crs-section-title {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 32px;
  color: var(--fg-1);
}

.crs-outcomes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 64px;
}

.crs-outcome {
  border: var(--border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  display: flex;
  gap: 14px;
  align-items: baseline;
}

.crs-outcome__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--team-blue);
  font-weight: 600;
  flex-shrink: 0;
  letter-spacing: 0.06em;
}

.crs-outcome__txt {
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-strong);
}

@media (max-width: 700px) {
  .crs-outcomes { grid-template-columns: 1fr; }
  .crs-hero__title { font-size: 38px; }
  /* Tighten the syllabus module rows so the mono duration chips never push
     the page wider than a 320px viewport — let chips wrap and shrink gaps. */
  .crs-mod-row { grid-template-columns: 44px 1fr auto; gap: 12px; }
  .crs-mod-row__chips { flex-wrap: wrap; gap: 8px 12px; }
}

/* ============================================================
   Module grid (course home)
   ============================================================ */

.crs-mods {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: var(--border);
}

.crs-mod-row {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  border-bottom: var(--border);
  text-decoration: none;
  color: inherit;
  transition: var(--ease);
}
.crs-mod-row:hover { background: #fafbfc; }
.crs-mod-row:hover .crs-mod-row__name { color: var(--team-blue); }

.crs-mod-row__code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  font-weight: 600;
  padding-top: 4px;
}

.crs-mod-row__body { min-width: 0; }

.crs-mod-row__name {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
  color: var(--fg-1);
  transition: var(--ease);
}

.crs-mod-row__tagline {
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-2);
  margin: 0 0 12px;
  max-width: 580px;
}

.crs-mod-row__chips {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--fg-2);
  font-family: var(--font-mono);
}

.crs-mod-row__chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.04em;
}

.crs-mod-row__chip-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--team-gray-300);
}

.crs-mod-row__arrow {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--fg-3);
  padding-top: 4px;
  transition: var(--ease);
}
.crs-mod-row:hover .crs-mod-row__arrow { color: var(--team-blue); transform: translateX(4px); }

/* ============================================================
   Module page — overview + lessons
   ============================================================ */

.crs-mod-hero {
  padding-bottom: 36px;
  border-bottom: var(--border);
  margin-bottom: 40px;
}

.crs-mod-hero__crumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.crs-mod-hero__crumbs a {
  color: var(--fg-2);
  text-decoration: none;
}
.crs-mod-hero__crumbs a:hover { color: var(--team-blue); }

.crs-mod-hero__code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--team-blue);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.crs-mod-hero__title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

.crs-mod-hero__tag {
  font-size: 18px;
  line-height: 1.5;
  color: var(--fg-2);
  margin: 0 0 28px;
  max-width: 640px;
}

.crs-mod-hero__meta {
  display: flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-2);
  letter-spacing: 0.04em;
}

.crs-mod-hero__meta-strong {
  color: var(--fg-1);
  font-weight: 600;
}

/* lesson list on module page */

.crs-lessons {
  margin-top: 16px;
  border-top: var(--border);
}

.crs-lesson-row {
  display: grid;
  grid-template-columns: 60px 28px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: var(--border);
  text-decoration: none;
  color: inherit;
  transition: var(--ease);
}
.crs-lesson-row:hover { padding-left: 8px; padding-right: 8px; background: #fafbfc; border-radius: 6px; border-bottom: var(--border); }
.crs-lesson-row:hover .crs-lesson-row__title { color: var(--team-blue); }

.crs-lesson-row__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.crs-lesson-row__icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--team-gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--fg-3);
  font-weight: 600;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.crs-lesson-row__icon--reading { color: var(--fg-2); }
.crs-lesson-row__icon--lab { color: var(--team-blue); border-color: var(--team-blue); }
.crs-lesson-row__icon--quiz { color: var(--team-purple); border-color: var(--team-purple); }
.crs-lesson-row__icon--workshop { color: var(--team-orange); border-color: var(--team-orange); }
.crs-lesson-row__icon--case { color: var(--team-green); border-color: var(--team-green); }

.crs-lesson-row__title {
  font-size: 16px;
  font-weight: 500;
  color: var(--fg-1);
  letter-spacing: -0.005em;
}

.crs-lesson-row__dur {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
}

/* objectives card on module page */
.crs-obj {
  margin: 36px 0 48px;
  background: var(--team-gray-50);
  border-radius: var(--r-lg);
  padding: 28px 32px;
  border: var(--border);
}
.crs-obj__h {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-2);
  text-transform: uppercase;
  margin: 0 0 16px;
  font-weight: 600;
}
.crs-obj__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.crs-obj__item {
  display: flex;
  gap: 14px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--fg-strong);
}
.crs-obj__item-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--team-blue);
  font-weight: 600;
  flex-shrink: 0;
  padding-top: 4px;
}

/* ============================================================
   Lesson page — long-form reader
   ============================================================ */

.crs-lesson-hero {
  padding-bottom: 32px;
  border-bottom: var(--border);
  margin-bottom: 40px;
}

.crs-lesson-hero__crumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.crs-lesson-hero__crumbs a { color: var(--fg-2); text-decoration: none; }
.crs-lesson-hero__crumbs a:hover { color: var(--team-blue); }
.crs-lesson-hero__crumbs-sep { margin: 0 8px; color: var(--fg-3); }

.crs-lesson-hero__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--team-blue);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.crs-lesson-hero__title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  text-wrap: balance;
}

.crs-lesson-hero__obj {
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg-2);
  margin: 0 0 20px;
  max-width: 640px;
  font-style: italic;
}

.crs-lesson-hero__meta {
  display: flex;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-2);
  letter-spacing: 0.04em;
}

.crs-lesson-hero__kind {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--team-gray-300);
  border-radius: var(--r-pill);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

/* prose */

.crs-prose h2 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin: 40px 0 14px;
  color: var(--fg-1);
}

.crs-prose p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-1);
  margin: 0 0 18px;
  text-wrap: pretty;
}

.crs-prose p:first-child::first-letter {
  /* subtle drop cap on first paragraph of section */
}

/* ============================================================
   Callouts — quote / note / warn / spec
   ============================================================ */

.crs-callout {
  margin: 32px 0;
  border-radius: var(--r-lg);
  padding: 20px 24px;
}

.crs-callout--quote {
  border-left: 3px solid var(--team-blue);
  padding-left: 24px;
  background: transparent;
  border-radius: 0;
  margin-left: 0;
  margin-right: 0;
}
.crs-callout--quote .crs-callout__txt {
  font-size: 19px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--fg-1);
  letter-spacing: -0.01em;
}
.crs-callout--quote .crs-callout__attr {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0.06em;
  margin-top: 12px;
  text-transform: uppercase;
}

.crs-callout--note {
  background: var(--team-blue-50);
  border: 1px solid #cfe2ff;
}
.crs-callout--note .crs-callout__h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--team-blue-hover);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.crs-callout--note .crs-callout__txt {
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg-strong);
}

.crs-callout--warn {
  background: #fff8e6;
  border: 1px solid #f3d97a;
}
.crs-callout--warn .crs-callout__h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #8a5a00;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.crs-callout--warn .crs-callout__txt {
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg-strong);
}

.crs-callout--spec {
  background: var(--team-gray-900);
  color: #e6e7eb;
  padding: 20px 24px;
  border-radius: var(--r-lg);
}
.crs-callout--spec .crs-callout__h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #8a8d91;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.crs-callout--spec pre {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  color: #e6e7eb;
}
.crs-callout--spec pre .h { color: #79c0ff; }
.crs-callout--spec pre .c { color: #8b949e; font-style: italic; }

/* ============================================================
   Exercise cards
   ============================================================ */

.crs-exercise {
  margin: 40px 0;
  border: 1.5px solid var(--team-blue);
  border-radius: var(--r-lg);
  background: #fafcff;
  padding: 24px 28px;
}

.crs-exercise__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}

.crs-exercise__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--team-blue);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.crs-exercise__kind {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.crs-exercise__prompt {
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg-1);
  margin: 0 0 18px;
  font-weight: 500;
}

.crs-exercise textarea,
.crs-exercise input[type=text] {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.55;
  padding: 12px 14px;
  border: var(--border);
  border-radius: var(--r-md);
  resize: vertical;
  background: var(--team-white);
  color: var(--fg-1);
  margin-bottom: 8px;
  outline: none;
  transition: border-color 0.15s ease;
}

.crs-exercise textarea:focus,
.crs-exercise input[type=text]:focus {
  border-color: var(--team-blue);
  box-shadow: 0 0 0 3px rgba(8, 102, 255, 0.12);
}

/* self-rate */
.crs-rate-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: center;
  padding: 16px 0;
  border-bottom: var(--border);
}
.crs-rate-row:last-child { border-bottom: none; }
.crs-rate-row__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-1);
}

.crs-rate-scale {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.crs-rate-pill {
  padding: 10px 8px;
  border: var(--border);
  border-radius: var(--r-md);
  font-size: 11.5px;
  text-align: center;
  background: var(--team-white);
  cursor: pointer;
  color: var(--fg-2);
  line-height: 1.3;
  transition: var(--ease);
}
.crs-rate-pill:hover { border-color: var(--team-blue); color: var(--fg-1); }
.crs-rate-pill.is-on {
  border-color: var(--team-blue);
  background: var(--team-blue);
  color: var(--fg-on-blue);
  font-weight: 500;
}

/* matrix */
.crs-matrix-wrap {
  max-width: 100%;
}
.crs-matrix {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
.crs-matrix th, .crs-matrix td {
  text-align: center;
  padding: 10px 8px;
  border-bottom: var(--border);
  font-size: 12.5px;
}
.crs-matrix th {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--fg-2);
  text-transform: uppercase;
}
.crs-matrix th:first-child, .crs-matrix td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--fg-1);
  font-size: 13px;
  text-transform: none;
  letter-spacing: 0;
}
.crs-matrix__cell {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 50%;
  border: 1.5px solid var(--team-gray-300);
  background: var(--team-white);
  color: var(--fg-on-blue);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: var(--ease);
}
.crs-matrix__cell:hover { border-color: var(--team-blue); }
.crs-matrix__cell.is-on {
  background: var(--team-blue);
  border-color: var(--team-blue);
}

/* plays */
.crs-plays {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}
.crs-plays__row {
  display: flex;
  width: 100%;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  border: var(--border);
  border-radius: var(--r-md);
  background: var(--team-white);
  cursor: pointer;
  transition: var(--ease);
  text-align: left;
  font: inherit;
  color: inherit;
}
.crs-plays__row:hover { border-color: var(--team-blue); }
.crs-plays__row.is-on { border-color: var(--team-blue); background: #f4f8ff; }

.crs-plays__check {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1.5px solid var(--team-gray-300);
  flex-shrink: 0;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 700;
  background: white;
}
.crs-plays__row.is-on .crs-plays__check {
  background: var(--team-blue);
  border-color: var(--team-blue);
}
.crs-plays__txt {
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-1);
}

/* slot rows for fleet design / eval / ladder / review */
.crs-slot-row {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: start;
  margin-bottom: 10px;
}
.crs-slot-row__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--team-blue);
  font-weight: 600;
  letter-spacing: 0.06em;
  padding-top: 12px;
}

/* ============================================================
   Quiz
   ============================================================ */

.crs-quiz {
  margin: 0;
}

.crs-quiz__intro {
  font-size: 15px;
  color: var(--fg-2);
  margin-bottom: 32px;
  line-height: 1.55;
}

.crs-q {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: var(--border);
}
.crs-q:last-child { border-bottom: none; }

.crs-q__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 10px;
}

.crs-q__txt {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--fg-1);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

.crs-q__opts {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.crs-opt {
  display: flex;
  width: 100%;
  gap: 14px;
  padding: 14px 18px;
  border: 1.5px solid var(--team-gray-200);
  border-radius: var(--r-md);
  background: var(--team-white);
  cursor: pointer;
  transition: var(--ease);
  align-items: flex-start;
  text-align: left;
  font: inherit;
  color: inherit;
}
.crs-opt:hover:not(:disabled) { border-color: var(--team-gray-400); }
.crs-opt:disabled { cursor: default; }
.crs-opt.is-picked { border-color: var(--team-blue); background: #f4f8ff; }
.crs-opt.is-correct { border-color: var(--team-green); background: #effaf3; }
.crs-opt.is-wrong { border-color: var(--team-red); background: #fdf0f2; }

.crs-opt__letter {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  font-weight: 700;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--team-gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0;
  margin-top: 1px;
}
.crs-opt.is-picked .crs-opt__letter {
  background: var(--team-blue);
  color: white;
  border-color: var(--team-blue);
}
.crs-opt.is-correct .crs-opt__letter {
  background: var(--team-green);
  color: white;
  border-color: var(--team-green);
}
.crs-opt.is-wrong .crs-opt__letter {
  background: var(--team-red);
  color: white;
  border-color: var(--team-red);
}

.crs-opt__txt {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--fg-1);
}

.crs-quiz__actions {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.crs-btn {
  padding: 11px 20px;
  border-radius: var(--r-md);
  border: var(--border);
  background: var(--team-white);
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-1);
  cursor: pointer;
  transition: var(--ease);
}
.crs-btn:hover { background: var(--bg-hover); }
.crs-btn--primary {
  background: var(--team-blue);
  color: white;
  border-color: var(--team-blue);
}
.crs-btn--primary:hover { background: var(--team-blue-hover); }
.crs-btn--primary:disabled {
  background: var(--team-gray-200);
  border-color: var(--team-gray-200);
  color: var(--fg-2);
  cursor: not-allowed;
}

.crs-quiz__score {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-1);
  font-weight: 600;
  letter-spacing: 0.04em;
}
/* Score colors darkened so the small (13px) bold mono text clears WCAG AA
   (>=4.5:1) on the white card. The base green (#31A24C=3.28) and yellow
   (#F7B928=1.76) tokens are tuned for large/dark surfaces and fail as small
   text on white. These darker shades keep the same hue. */
.crs-quiz__score--good { color: #2A8040; }
.crs-quiz__score--mid { color: #9A6700; }
.crs-quiz__score--bad { color: var(--team-red); }

/* ============================================================
   Lesson footer nav
   ============================================================ */

.crs-lesson-foot {
  margin-top: 64px;
  padding-top: 32px;
  border-top: var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.crs-lesson-foot__btn {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 22px;
  border: var(--border);
  border-radius: var(--r-lg);
  text-decoration: none;
  color: inherit;
  transition: var(--ease);
}
.crs-lesson-foot__btn:hover { border-color: var(--team-blue); background: #fafbff; }
.crs-lesson-foot__btn--next { text-align: right; }
.crs-lesson-foot__btn--disabled {
  opacity: 0.4;
  pointer-events: none;
}

.crs-lesson-foot__dir {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
}

.crs-lesson-foot__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-1);
}

/* ============================================================
   Section divider
   ============================================================ */

.crs-syllabus-h {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin: 56px 0 24px;
}

.crs-syllabus-h__l {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-2);
  text-transform: uppercase;
  font-weight: 600;
}
.crs-syllabus-h__r {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--fg-3);
}

/* ============================================================
   Mobile exercise-widget overrides
   (placed last so they win source-order over the top-level
   widget rules defined earlier in this file)
   ============================================================ */
@media (max-width: 700px) {
  /* self-rate: stack label over scale, halve the scale columns
     so the rating pills never push the page wider than the viewport */
  .crs-rate-row {
    grid-template-columns: 1fr;
    gap: 8px;
    align-items: stretch;
  }
  .crs-rate-scale { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  /* matrix: scroll inside its own box instead of widening the page */
  .crs-matrix-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .crs-matrix { min-width: 0; }
  .crs-matrix th, .crs-matrix td { padding: 8px 6px; }
  .crs-matrix th:first-child, .crs-matrix td:first-child {
    white-space: normal;
    word-break: break-word;
  }
}