/* Marketing Data Science Made Easy — course shell (evergreen / live) */
body.mds-course {
  background:
    radial-gradient(ellipse 70% 40% at 88% -8%, rgba(94, 231, 240, 0.1), transparent 55%),
    radial-gradient(ellipse 50% 35% at 0% 20%, rgba(26, 163, 122, 0.06), transparent 50%),
    var(--paper-2);
}

.mds-draft-banner {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #0a1221;
  color: #e8eef4;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  padding: 0.55rem 1rem;
  text-align: center;
  border-bottom: 1px solid rgba(94, 231, 240, 0.25);
}
.mds-draft-banner strong {
  color: var(--cyan);
  font-weight: 600;
}

.mds-shell {
  display: grid;
  grid-template-columns: minmax(0, 14rem) minmax(0, 1fr);
  gap: 1.5rem 2rem;
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.25rem 1.15rem 3.5rem;
}
@media (max-width: 860px) {
  .mds-shell {
    grid-template-columns: 1fr;
    padding-top: 0.75rem;
  }
}

.mds-nav {
  position: sticky;
  top: 1rem;
  align-self: start;
  padding: 1rem 0.85rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 0;
}
@media (max-width: 860px) {
  .mds-nav {
    position: static;
  }
}
.mds-nav .mds-brand {
  display: block;
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  margin-bottom: 0.35rem;
  color: var(--ink);
}
.mds-nav .mds-price {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--mute);
  margin: 0 0 0.85rem;
}
.mds-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
.mds-nav li + li {
  margin-top: 0.2rem;
}
.mds-nav a {
  display: block;
  text-decoration: none;
  font-size: 0.84rem;
  padding: 0.35rem 0.4rem;
  color: var(--mute);
  border-left: 2px solid transparent;
}
.mds-nav a:hover {
  color: var(--ink);
}
.mds-nav a.is-active {
  color: var(--ink);
  border-left-color: var(--cyan-deep);
  background: rgba(94, 231, 240, 0.08);
}
.mds-nav a.done::after {
  content: " ✓";
  color: var(--truth);
  font-size: 0.75em;
}

.mds-main {
  min-width: 0;
}
.mds-kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--mute);
  margin: 0 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.mds-main h1 {
  font-family: var(--display);
  font-size: clamp(1.65rem, 3.8vw, 2.35rem);
  letter-spacing: -0.035em;
  line-height: 1.12;
  margin: 0 0 0.65rem;
  max-width: 22ch;
}
.mds-lede {
  font-size: 1.05rem;
  color: var(--ink);
  max-width: 38rem;
  margin: 0 0 1.35rem;
}
.mds-answer {
  max-width: 40rem;
  margin: 0 0 1.5rem;
  padding: 0.95rem 1.1rem;
  border-left: 3px solid var(--cyan-deep);
  background: rgba(94, 231, 240, 0.07);
}
.mds-answer p {
  margin: 0;
  line-height: 1.5;
}
.mds-main h2 {
  font-family: var(--display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  margin: 1.75rem 0 0.5rem;
}
.mds-main h3 {
  font-size: 1rem;
  margin: 1.2rem 0 0.4rem;
}
.mds-main p,
.mds-main li {
  max-width: 40rem;
  line-height: 1.55;
  color: var(--ink);
}
.mds-main ul,
.mds-main ol {
  padding-left: 1.2rem;
}
.mds-main li + li {
  margin-top: 0.35rem;
}
.mds-formula {
  font-family: var(--mono);
  font-size: 0.92rem;
  padding: 0.85rem 1rem;
  background: rgba(10, 18, 33, 0.04);
  border-left: 3px solid var(--cyan-deep);
  margin: 0.75rem 0 1rem;
  max-width: 40rem;
}
.mds-callout {
  max-width: 40rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
  margin: 1rem 0 1.25rem;
}
.mds-callout strong {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}
.mds-refuse {
  border-left: 3px solid var(--lie);
  background: rgba(194, 69, 50, 0.06);
}
.mds-pay-strip {
  margin: 0 0 1.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid #d5e0e4;
  border-left: 4px solid #0b6e6e;
  background: #fff;
  font-size: 0.95rem;
}
.mds-pay-strip p {
  margin: 0;
  max-width: 40rem;
}
.mds-pay-strip p + p {
  margin-top: 0.55rem;
}
.mds-pay-strip .btn {
  display: inline-block;
  margin-top: 0.15rem;
}
.mds-delivery {
  max-width: 40rem;
  margin: 0 0 1.5rem;
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 4px solid #0b6e6e;
  background: #fff;
}
.mds-delivery h2 {
  margin: 0 0 0.65rem;
  font-size: 1.1rem;
}
.mds-delivery ol {
  margin: 0 0 0.75rem;
  padding-left: 1.2rem;
}
.mds-delivery-note {
  font-size: 0.9rem;
  color: var(--mute);
  margin: 0 0 0.85rem;
  max-width: 38rem;
}
.mds-pack-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.92rem;
}
.mds-outcomes {
  max-width: 40rem;
  margin: 0 0 1.35rem;
}
.mds-outcomes h2 {
  margin-top: 0;
}
.mds-outcomes ul {
  margin: 0.4rem 0 0;
}
.mds-trust {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--mute);
  margin: 0.35rem 0 1rem;
  letter-spacing: 0.02em;
  max-width: 40rem;
}
.mds-faq {
  max-width: 40rem;
  margin: 1.75rem 0 1.5rem;
}
.mds-faq h2 {
  margin-top: 0;
}
.mds-faq dl {
  margin: 0.5rem 0 0;
}
.mds-faq dl > div {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}
.mds-faq dt {
  font-family: var(--display);
  font-weight: 650;
  font-size: 0.98rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.3rem;
}
.mds-faq dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink);
  max-width: 38rem;
}
.mds-retrieve {
  max-width: 40rem;
  margin: 1.1rem 0 1.25rem;
  padding: 0.85rem 1rem;
  border: 1px dashed var(--line);
  background: rgba(10, 18, 33, 0.03);
}
.mds-retrieve strong {
  display: block;
  font-size: 0.82rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 0.35rem;
}
.mds-retrieve p {
  margin: 0;
  font-size: 0.95rem;
}
.mds-retrieve .mds-pack-hint {
  margin-top: 0.55rem;
  font-size: 0.88rem;
  color: var(--mute);
}
.mds-decision {
  max-width: 40rem;
  margin: 1rem 0 1.35rem;
  padding: 0.9rem 1rem;
  background: rgba(26, 163, 122, 0.07);
  border-left: 3px solid var(--truth);
}
.mds-decision strong {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}
.mds-main .mono,
span.mono {
  font-family: var(--mono);
  font-size: 0.88em;
}
.mds-cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.75rem;
  margin: 1.5rem 0 0.5rem;
}
.mds-cta-row a {
  font-size: 0.92rem;
}
/* Light desk surface — site .btn.ghost is dark-band; override here */
body.mds-course .mds-cta-row .btn {
  font-size: 0.88rem;
  padding: 0.68rem 1.05rem;
}
body.mds-course .mds-cta-row .btn.ghost {
  border-color: rgba(10, 18, 33, 0.16);
  color: var(--ink);
  background: #fff;
}
body.mds-course .mds-cta-row .btn.ghost:hover {
  background: rgba(94, 231, 240, 0.12);
  border-color: var(--cyan-deep);
  color: var(--ink);
}
.mds-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  max-width: 40rem;
}
.mds-pager a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--cyan-deep);
}
.mds-pager a:hover {
  text-decoration: underline;
}

/* Interactives */
.mds-lab {
  max-width: 40rem;
  margin: 1.25rem 0 1.75rem;
  padding: 1.15rem 1.2rem 1.25rem;
  background: #fff;
  border: 1px solid var(--line);
}
.mds-lab h3 {
  margin: 0 0 0.75rem;
  font-family: var(--display);
  font-size: 1.05rem;
}
.mds-lab label {
  display: block;
  font-size: 0.82rem;
  color: var(--mute);
  margin: 0.65rem 0 0.25rem;
}
.mds-lab input[type="number"],
.mds-lab input[type="text"],
.mds-lab select {
  width: 100%;
  max-width: 16rem;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
}
.mds-lab input[type="range"] {
  width: 100%;
  max-width: 20rem;
}
.mds-lab .mds-out {
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.65rem 0.75rem;
  background: rgba(10, 18, 33, 0.04);
}
.mds-lab .mds-hint {
  font-size: 0.8rem;
  color: var(--mute);
  margin: 0.5rem 0 0;
}
.mds-lab [data-mds-q] button {
  display: block;
  width: 100%;
  max-width: 28rem;
  text-align: left;
  margin: 0.35rem 0;
  font: inherit;
  font-size: 0.88rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
  cursor: pointer;
}
.mds-lab [data-mds-q] button:hover {
  border-color: var(--cyan-deep);
}

.mds-card-stack {
  display: grid;
  gap: 0.75rem;
  max-width: 40rem;
}
.mds-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.85rem 1rem;
  cursor: pointer;
  text-align: left;
  font: inherit;
  width: 100%;
}
.mds-card .term {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
}
.mds-card .def {
  display: none;
  margin-top: 0.45rem;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--ink);
}
.mds-card.is-open .def {
  display: block;
}
.mds-card.refuse-term {
  border-left: 3px solid var(--lie);
}

.mds-prompt {
  max-width: 40rem;
  margin: 0 0 1rem;
  border: 1px solid var(--line);
  background: #fff;
}
.mds-prompt header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 18, 33, 0.03);
}
.mds-prompt header h3 {
  margin: 0;
  font-size: 0.92rem;
  font-family: var(--display);
}
.mds-prompt button {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}
.mds-prompt button:hover {
  border-color: var(--cyan-deep);
}
.mds-prompt pre {
  margin: 0;
  padding: 0.85rem 1rem;
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--ink-2);
}

.mds-syllabus {
  max-width: 40rem;
  margin: 1rem 0 1.5rem;
  padding: 0;
  list-style: none;
}
.mds-syllabus li {
  margin: 0;
  border-bottom: 1px solid var(--line);
}
.mds-syllabus a {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.65rem;
  padding: 0.85rem 0;
  text-decoration: none;
  color: inherit;
}
.mds-syllabus .n {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--mute);
}
.mds-syllabus .t {
  font-family: var(--display);
  font-weight: 650;
  font-size: 1rem;
  letter-spacing: -0.02em;
}
.mds-syllabus .d {
  grid-column: 2;
  font-size: 0.88rem;
  color: var(--mute);
  margin-top: 0.15rem;
}
.mds-mark-done {
  margin-top: 1.25rem;
}
.mds-mark-done button {
  font: inherit;
  font-size: 0.88rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}
.mds-mark-done button:hover {
  border-color: var(--truth);
}