/* ═══════════════════════════════════════════════════════════════════════════
   AI BOSS COURSES — shared course styles
   Used by ai-boss-courses.html and every page in courses/.
   Depends on style.css tokens (--blue, --cyan, --magenta, --orange, --teal,
   --yellow, --dark, --font-display, --font-body).
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── CATALOG HERO ────────────────────────────────────────────────────────── */
.crs-hero {
  background: var(--dark);
  color: var(--white);
  padding: 150px 0 70px;
  position: relative;
  overflow: hidden;
}
.crs-hero::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(38,198,218,0.28), transparent 65%);
  pointer-events: none;
}
.crs-hero__eyebrow {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}
.crs-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.02;
  margin-bottom: 18px;
}
.crs-hero__sub {
  max-width: 640px;
  font-size: 1.06rem;
  font-weight: 300;
  color: rgba(255,255,255,0.82);
  margin-bottom: 28px;
}
.crs-hero__badges { display: flex; flex-wrap: wrap; gap: 10px; }
.crs-badge {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid rgba(255,255,255,0.35);
  color: rgba(255,255,255,0.9);
}
.crs-badge--solid { background: var(--yellow); border-color: var(--yellow); color: var(--black); font-weight: 600; }

/* ─── CATALOG GRID ────────────────────────────────────────────────────────── */
.crs-catalog { padding: 70px 0 40px; background: var(--grey); }
.crs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}
.crs-card {
  background: var(--white);
  border: 1px solid var(--mid-grey);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.crs-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(0,0,0,0.12); }
.crs-card__banner {
  height: 150px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.crs-card__banner--llm  { background: linear-gradient(120deg, var(--blue), var(--cyan)); }
.crs-card__banner--dif  { background: linear-gradient(120deg, var(--magenta), var(--orange)); }
.crs-card__banner--safe { background: linear-gradient(120deg, var(--teal), var(--dark)); }
.crs-card__banner svg { width: 84%; height: 84%; opacity: 0.95; }
.crs-card__logo {
  position: absolute;
  top: 10px; right: 10px;
  width: 46px; height: 46px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  padding: 5px;
}
.crs-card__body { padding: 22px 22px 18px; display: flex; flex-direction: column; flex: 1; }
.crs-card__kicker {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.crs-card__title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1.15;
  margin-bottom: 10px;
}
.crs-card__desc { font-size: 0.94rem; color: var(--text-dim); margin-bottom: 16px; flex: 1; }
.crs-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid var(--mid-grey);
  padding-top: 14px;
  margin-bottom: 16px;
}
.crs-card__meta strong { color: var(--text); font-weight: 600; }
.crs-card__skills { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.crs-skill {
  font-size: 0.72rem;
  padding: 4px 10px;
  background: var(--grey);
  border: 1px solid var(--mid-grey);
  color: var(--text-dim);
}
.crs-card .btn { text-align: center; }

/* ─── COURSE PAGE HERO ────────────────────────────────────────────────────── */
.cpg-hero { background: var(--dark); color: var(--white); padding: 140px 0 0; }
.cpg-hero--llm  { background: linear-gradient(135deg, #0d2b52 0%, var(--dark) 70%); }
.cpg-hero--dif  { background: linear-gradient(135deg, #4a0f2b 0%, var(--dark) 70%); }
.cpg-hero--safe { background: linear-gradient(135deg, #043c36 0%, var(--dark) 70%); }
.cpg-hero__crumb {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: 20px;
}
.cpg-hero__crumb a { color: var(--cyan); }
.cpg-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 16px;
  max-width: 900px;
}
.cpg-hero__sub { max-width: 700px; font-weight: 300; font-size: 1.08rem; color: rgba(255,255,255,0.85); margin-bottom: 26px; }
.cpg-hero__actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 34px; }
.cpg-hero__enrolled { font-size: 0.9rem; color: var(--cyan); }
.cpg-hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  border-top: 1px solid rgba(255,255,255,0.18);
}
.cpg-hero__meta-item { padding: 18px 18px 22px; border-right: 1px solid rgba(255,255,255,0.12); }
.cpg-hero__meta-item:last-child { border-right: none; }
.cpg-hero__meta-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--yellow);
}
.cpg-hero__meta-label { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.6); }

/* ─── SECTION SHELLS ─────────────────────────────────────────────────────── */
.cpg-section { padding: 64px 0; }
.cpg-section--grey { background: var(--grey); }
.cpg-section--dark { background: var(--dark); color: var(--white); }
.cpg-eyebrow {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--magenta);
  margin-bottom: 10px;
}
.cpg-section--dark .cpg-eyebrow { color: var(--cyan); }
.cpg-heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 18px;
}
.cpg-lede { max-width: 760px; font-size: 1.02rem; color: var(--text-dim); margin-bottom: 30px; }
.cpg-section--dark .cpg-lede { color: rgba(255,255,255,0.78); }

/* ─── LEARN CHECKLIST ─────────────────────────────────────────────────────── */
.cpg-learn {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px 28px;
}
.cpg-learn li {
  position: relative;
  padding-left: 30px;
  font-size: 0.96rem;
}
.cpg-learn li::before {
  content: "\2713";
  position: absolute;
  left: 0; top: 1px;
  width: 20px; height: 20px;
  background: var(--teal);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── RESEARCH STAT STRIP ─────────────────────────────────────────────────── */
.cpg-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.cpg-stat { background: var(--white); border-top: 4px solid var(--blue); padding: 22px; }
.cpg-stat:nth-child(2) { border-top-color: var(--magenta); }
.cpg-stat:nth-child(3) { border-top-color: var(--orange); }
.cpg-stat:nth-child(4) { border-top-color: var(--teal); }
.cpg-stat__num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}
.cpg-stat__text { font-size: 0.88rem; color: var(--text-dim); }
.cpg-stat__src { display: block; margin-top: 10px; font-size: 0.72rem; color: #999; }

/* ─── LESSON PAGES (one lecture on screen at a time) ─────────────────────── */
.mod { border: 1px solid var(--mid-grey); background: var(--white); margin-bottom: 14px; }
.course-paged .mod { display: none; }
.course-paged .mod.mod--active { display: block; }
.mod__head {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 22px;
}
.mod__num {
  flex: 0 0 auto;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--dark);
  color: var(--white);
}
.mod--done .mod__num { background: var(--teal); }
.mod__titles { flex: 1; min-width: 0; }
.mod__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1.2;
}
.mod__sub { font-size: 0.83rem; color: var(--text-dim); margin-top: 2px; }
.mod__body { padding: 6px 24px 30px; border-top: 1px solid var(--mid-grey); }
.mod__body > p, .mod__body > ul, .mod__body > ol { max-width: 800px; margin: 16px 0; }
.mod__body ul, .mod__body ol { padding-left: 22px; }
.mod__body ul li, .mod__body ol li { margin-bottom: 8px; list-style: disc; }
.mod__body ol li { list-style: decimal; }
.mod__body h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 30px 0 8px;
  color: var(--blue);
}
.mod__complete { margin-top: 26px; }
.mod__complete .btn--done { background: var(--teal); border-color: var(--teal); color: var(--white); pointer-events: none; }

/* Course player: Coursera-style sidebar + content pane */
.player {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  border: 1px solid var(--mid-grey);
  background: var(--white);
}
.player__side {
  background: var(--grey);
  border-right: 1px solid var(--mid-grey);
  position: sticky;
  top: 64px;
  align-self: start;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}
.player__side-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--mid-grey);
}
.pring { flex: 0 0 auto; }
#pringFill { transition: stroke-dashoffset 0.6s var(--ease); }
.player__side-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.player__side-sub { font-size: 0.76rem; color: var(--text-dim); margin-top: 2px; }
.player__list { padding: 8px 0 16px; }
.side-item {
  display: flex;
  width: 100%;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  background: none;
  border: none;
  border-left: 3px solid transparent;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  transition: background 0.15s;
}
.side-item:hover { background: rgba(0,0,0,0.05); }
.side-item--active { background: var(--white); border-left-color: var(--blue); }
.side-item__check {
  flex: 0 0 auto;
  width: 22px; height: 22px;
  border: 2px solid var(--mid-grey);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: transparent;
  background: var(--white);
  transition: all 0.25s;
}
.side-item--done .side-item__check {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
  animation: popCheck 0.35s var(--ease);
}
.side-item__kicker {
  display: block;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #999;
}
.side-item__name {
  display: block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1.25;
}
.side-item--exam { border-top: 1px solid var(--mid-grey); margin-top: 8px; }
.side-item--exam .side-item__check { color: var(--yellow); border-color: var(--yellow); }
.player__topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 22px;
  background: var(--grey);
  border-bottom: 1px solid var(--mid-grey);
}
.player__menu {
  display: none;
  background: var(--dark);
  color: var(--white);
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 14px;
}
.player__count {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.course-paged .mod { display: none; border: none; margin: 0; }
.course-paged .mod.mod--active { display: block; animation: lessonIn 0.4s var(--ease); }
@keyframes lessonIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
@keyframes popCheck {
  0%   { transform: scale(0.4); }
  70%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* Prev/next bar at the bottom of each lecture */
.lesson-footbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 22px;
  border-top: 1px solid var(--mid-grey);
  margin-top: 12px;
}
.lesson-footbar .btn:disabled { opacity: 0.35; cursor: default; pointer-events: none; }

/* Voxel canvases */
.vox-canvas { display: block; max-width: 100%; }
.cpg-hero__viz {
  position: absolute;
  right: var(--gutter);
  top: 120px;
  width: 340px;
  height: 260px;
  pointer-events: none;
}
@media (max-width: 1100px) { .cpg-hero__viz { display: none; } }
@media (min-width: 1101px) {
  .cpg-hero__title, .cpg-hero__sub { max-width: min(720px, calc(100% - 380px)); }
}
.cpg-hero { position: relative; }

/* Animated progress fill shimmer */
.cpg-progress__fill {
  background-image: linear-gradient(100deg, var(--teal) 40%, #26d0aa 50%, var(--teal) 60%);
  background-size: 200% 100%;
  animation: shimmer 2.4s linear infinite;
}
@keyframes shimmer {
  from { background-position: 120% 0; }
  to   { background-position: -80% 0; }
}

/* term callout: demystify vocabulary in place */
.term {
  background: #fffbe8;
  border-left: 4px solid var(--yellow);
  padding: 14px 18px;
  margin: 18px 0;
  max-width: 800px;
  font-size: 0.92rem;
}
.term strong { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.86rem; }

/* research callout */
.evidence {
  background: #eef4fb;
  border-left: 4px solid var(--blue);
  padding: 14px 18px;
  margin: 18px 0;
  max-width: 800px;
  font-size: 0.92rem;
}
.evidence strong { color: var(--blue); }
.evidence .src { display: block; margin-top: 6px; font-size: 0.76rem; color: #778; }

/* Feynman "stop and think" prompt */
.think {
  border: 2px dashed var(--magenta);
  padding: 16px 18px;
  margin: 22px 0;
  max-width: 800px;
  font-size: 0.95rem;
}
.think strong { font-family: var(--font-display); text-transform: uppercase; color: var(--magenta); letter-spacing: 0.06em; font-size: 0.85rem; display: block; margin-bottom: 6px; }

/* ─── INTERACTIVE WIDGET SHELL ────────────────────────────────────────────── */
.lab {
  background: var(--dark);
  color: var(--white);
  padding: 24px;
  margin: 26px 0;
  border-top: 4px solid var(--cyan);
}
.lab__label {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 6px;
}
.lab__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; text-transform: uppercase; margin-bottom: 8px; }
.lab__hint { font-size: 0.88rem; color: rgba(255,255,255,0.72); margin-bottom: 18px; max-width: 720px; }
.lab__panel { background: rgba(255,255,255,0.06); padding: 18px; }
.lab__row { display: flex; flex-wrap: wrap; gap: 18px; align-items: flex-start; }
.lab__col { flex: 1 1 300px; min-width: 260px; }
.lab canvas, .lab svg.lab__viz { background: #10101c; display: block; max-width: 100%; }
.lab__controls { display: flex; flex-direction: column; gap: 12px; }
.lab__ctl label { display: flex; justify-content: space-between; font-size: 0.8rem; color: rgba(255,255,255,0.8); margin-bottom: 4px; }
.lab__ctl output { font-family: var(--font-display); color: var(--yellow); }
.lab input[type="range"] { width: 100%; accent-color: var(--cyan); }
.lab__btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.lab-btn {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 9px 18px;
  background: var(--cyan);
  color: var(--black);
  border: 2px solid var(--cyan);
  cursor: pointer;
  transition: all 0.2s;
}
.lab-btn:hover { background: transparent; color: var(--cyan); }
.lab-btn--ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.4); }
.lab-btn--ghost:hover { border-color: var(--white); color: var(--white); }
.lab-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.lab__readout {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-top: 12px;
  color: rgba(255,255,255,0.9);
}
.lab__readout .good { color: #4be3a8; }
.lab__readout .bad  { color: #ff7043; }
.lab__win {
  display: none;
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--teal);
  color: var(--white);
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.9rem;
}
.lab__win.show { display: block; }

/* ─── GAMES (choice cards) ───────────────────────────────────────────────── */
.game { background: var(--white); border: 2px solid var(--dark); padding: 24px; margin: 26px 0; }
.game__label {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 6px;
}
.game__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; text-transform: uppercase; margin-bottom: 8px; }
.game__hint { font-size: 0.88rem; color: var(--text-dim); margin-bottom: 18px; max-width: 720px; }
.game__item { font-size: 1rem; margin-bottom: 14px; padding: 14px 16px; background: var(--grey); max-width: 760px; }
.game__choices { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.game-choice {
  font-size: 0.9rem;
  padding: 10px 16px;
  background: var(--white);
  border: 2px solid var(--mid-grey);
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
}
.game-choice:hover { border-color: var(--dark); }
.game-choice.correct { background: var(--teal); border-color: var(--teal); color: var(--white); }
.game-choice.wrong { background: var(--magenta); border-color: var(--magenta); color: var(--white); }
.game-choice:disabled { cursor: default; }
.game__feedback { font-size: 0.9rem; padding: 12px 14px; margin: 10px 0; display: none; max-width: 760px; }
.game__feedback.show { display: block; }
.game__feedback--good { background: #e0f2ef; border-left: 4px solid var(--teal); }
.game__feedback--bad { background: #fde7ef; border-left: 4px solid var(--magenta); }
.game__score { font-family: var(--font-display); font-size: 1rem; text-transform: uppercase; letter-spacing: 0.06em; margin-top: 12px; }
.game__next { margin-top: 10px; }

/* ─── GLOSSARY ────────────────────────────────────────────────────────────── */
.gloss-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.gloss {
  background: var(--white);
  border: 1px solid var(--mid-grey);
  border-top: 3px solid var(--cyan);
  padding: 18px;
}
.gloss dt { font-family: var(--font-display); font-size: 1rem; font-weight: 600; text-transform: uppercase; margin-bottom: 6px; }
.gloss dd { font-size: 0.88rem; color: var(--text-dim); }

/* ─── FINAL EXAM ─────────────────────────────────────────────────────────── */
.exam { max-width: 820px; }
.exam__gate { background: var(--white); border: 2px solid var(--dark); padding: 28px; text-align: center; }
.exam__gate p { margin-bottom: 18px; color: var(--text-dim); }
.exam__progress { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.exam__progress-bar { flex: 1; height: 8px; background: var(--mid-grey); }
.exam__progress-fill { height: 100%; background: var(--blue); width: 0; transition: width 0.3s var(--ease); }
.exam__progress-label { font-family: var(--font-display); font-size: 0.9rem; white-space: nowrap; }
.exam__card { background: var(--white); border: 1px solid var(--mid-grey); padding: 28px; }
.exam__q { font-size: 1.08rem; font-weight: 500; margin-bottom: 20px; }
.exam__opts { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.exam-opt {
  text-align: left;
  font-size: 0.95rem;
  padding: 13px 16px;
  background: var(--grey);
  border: 2px solid var(--grey);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-body);
}
.exam-opt:hover { border-color: var(--blue); }
.exam-opt.selected { border-color: var(--blue); background: #e8f0fb; }
.exam__nav { display: flex; justify-content: space-between; gap: 12px; }
.exam__result { text-align: center; padding: 36px 24px; background: var(--white); border: 2px solid var(--dark); }
.exam__score-num { font-family: var(--font-display); font-size: 3.4rem; font-weight: 700; line-height: 1; }
.exam__score-num.pass { color: var(--teal); }
.exam__score-num.fail { color: var(--magenta); }
.exam__result h3 { font-family: var(--font-display); text-transform: uppercase; font-size: 1.4rem; margin: 10px 0; }
.exam__result p { color: var(--text-dim); margin-bottom: 20px; }
.exam__review { margin-top: 30px; text-align: left; }
.exam__review-item { padding: 16px; border: 1px solid var(--mid-grey); margin-bottom: 12px; background: var(--white); font-size: 0.9rem; }
.exam__review-item.good { border-left: 4px solid var(--teal); }
.exam__review-item.bad { border-left: 4px solid var(--magenta); }
.exam__review-item .exp { display: block; margin-top: 8px; color: var(--text-dim); }

/* ─── CERTIFICATE ─────────────────────────────────────────────────────────── */
.cert-wrap { max-width: 900px; margin: 0 auto; }
.cert {
  background: #fdfcf7;
  color: #1a1a2e;
  border: 3px solid var(--dark);
  outline: 1px solid var(--yellow);
  outline-offset: -12px;
  padding: clamp(24px, 6vw, 60px);
  text-align: center;
  position: relative;
}
.cert__logo { width: 96px; height: 96px; margin: 0 auto 10px; }
.cert__brand { font-family: var(--font-display); font-size: 0.95rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--magenta); margin-bottom: 26px; }
.cert__type { font-family: var(--font-display); font-size: clamp(1.4rem, 4vw, 2.1rem); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.cert__certifies { font-size: 0.92rem; color: #555; margin-bottom: 14px; }
.cert__name {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 600;
  border-bottom: 2px solid var(--dark);
  display: inline-block;
  padding: 0 30px 6px;
  margin-bottom: 18px;
}
.cert__course { font-size: 1.02rem; max-width: 560px; margin: 0 auto 6px; color: #333; }
.cert__course strong { font-family: var(--font-display); text-transform: uppercase; font-size: 1.15rem; }
.cert__score { font-size: 0.88rem; color: #555; margin-bottom: 30px; }
.cert__footer { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-top: 20px; }
.cert__sig { text-align: left; }
.cert__sig-name { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; border-top: 2px solid var(--dark); padding-top: 6px; }
.cert__sig-role { font-size: 0.76rem; color: #666; text-transform: uppercase; letter-spacing: 0.08em; }
.cert__date { text-align: right; font-size: 0.85rem; color: #444; }
.cert__code {
  margin-top: 28px;
  padding-top: 14px;
  border-top: 1px solid #d8d4c4;
  font-family: "Courier New", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: #555;
}
.cert-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 24px; }

/* ─── PROGRESS BAR (course page top of curriculum) ───────────────────────── */
.cpg-progress { display: flex; align-items: center; gap: 16px; margin-bottom: 26px; max-width: 560px; }
.cpg-progress__bar { flex: 1; height: 10px; background: var(--mid-grey); }
.cpg-progress__fill { height: 100%; background: var(--teal); width: 0; transition: width 0.4s var(--ease); }
.cpg-progress__label { font-family: var(--font-display); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; white-space: nowrap; }

/* ─── ENROLL MODAL ────────────────────────────────────────────────────────── */
.enroll-overlay {
  position: fixed; inset: 0;
  background: rgba(10,10,20,0.78);
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.enroll-overlay.show { display: flex; }
.enroll-modal { background: var(--white); max-width: 460px; width: 100%; padding: 34px; position: relative; }
.enroll-modal__close {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none;
  font-size: 1.6rem; cursor: pointer; color: var(--text-dim);
}
.enroll-modal h3 { font-family: var(--font-display); font-size: 1.5rem; text-transform: uppercase; margin-bottom: 8px; }
.enroll-modal p { font-size: 0.9rem; color: var(--text-dim); margin-bottom: 20px; }
.enroll-field { margin-bottom: 16px; }
.enroll-field label { display: block; font-family: var(--font-display); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 6px; }
.enroll-field input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--mid-grey);
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.enroll-field input:focus { outline: none; border-color: var(--blue); }
.enroll-error { color: var(--magenta); font-size: 0.84rem; margin-bottom: 12px; display: none; }
.enroll-error.show { display: block; }
.enroll-privacy { font-size: 0.74rem; color: #999; margin-top: 14px; }

/* ─── HOW IT WORKS (catalog) ─────────────────────────────────────────────── */
.crs-how { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 22px; }
.crs-how__step { background: var(--white); padding: 24px; border: 1px solid var(--mid-grey); }
.crs-how__num { font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--cyan); }
.crs-how__title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; text-transform: uppercase; margin: 8px 0 6px; }
.crs-how__text { font-size: 0.88rem; color: var(--text-dim); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .cpg-hero__meta { grid-template-columns: repeat(2, 1fr); }
  .cpg-hero__meta-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.12); }
  .mod__head { padding: 16px 14px; gap: 12px; }
  .mod__body { padding: 4px 16px 24px; }
  .lesson-footbar { padding: 16px 14px; }
  .cert__footer { flex-direction: column; align-items: center; }
  .cert__sig { text-align: center; }
  .cert__date { text-align: center; }
}

/* ─── PRINT (certificate) ─────────────────────────────────────────────────── */
@media print {
  body * { visibility: hidden; }
  .cert, .cert * { visibility: visible; }
  .cert { position: absolute; left: 0; top: 0; width: 100%; border-width: 6px; }
}

@media (max-width: 920px) {
  .player { grid-template-columns: 1fr; }
  .player__side {
    position: fixed;
    top: 60px; left: 0; bottom: 0;
    width: min(320px, 85vw);
    max-height: none;
    z-index: 350;
    transform: translateX(-105%);
    transition: transform 0.3s var(--ease);
    box-shadow: 12px 0 34px rgba(0,0,0,0.25);
  }
  .player--open .player__side { transform: none; }
  .player__menu { display: inline-block; }
}

/* Catalog hero voxel cluster */
.crs-hero .cpg-hero__viz { top: 150px; }
@media (max-width: 1100px) { .crs-hero .cpg-hero__viz { display: none; } }