/* Course syllabus + topic lessons — vertical Productly-inspired cards
   (icon + content rows, soft surfaces, bold type) — palette stays on-brand */

/* Full reading width on large screens (was 760px — felt cramped) */
.dm-learn-wrap--syllabus,
.dm-learn-wrap--topic-lessons,
.dm-learn-wrap--subject-catalog {
  max-width: min(1180px, 100%);
  margin-left: auto;
  margin-right: auto;
}

/* Syllabus section: subtle depth like Productly hero areas */
.dm-section--course-stack {
  background: var(--pl-surface, #f0f4f9);
}

.dm-syllabus-section-head {
  margin-bottom: 2.5rem;
  padding-left: clamp(0rem, 2vw, 1rem);
  padding-right: clamp(0rem, 2vw, 1rem);
  text-align: center;
}

.dm-syllabus-section-head .dm-syllabus-heading {
  margin-bottom: 0.5rem;
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.dm-syllabus-section-head .dm-syllabus-eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dm-primary);
  margin-bottom: 0.35rem;
}

.dm-syllabus-section-head .text-muted {
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.65;
  font-size: 0.9375rem;
}

/* —— Course hero stats —— */
.dm-course-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.dm-stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--dm-text-soft);
  background: var(--pl-card-bg, #fffefe);
  border: 1px solid var(--pl-card-border, rgba(0, 0, 0, 0.125));
  padding: 0.45rem 1rem;
  border-radius: 999px;
  box-shadow: var(--shadow-card, 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075));
}

.dm-stat-pill i {
  color: var(--dm-primary);
  font-size: 1.05rem;
}

/* —— Topic stack: generous vertical rhythm, full horizontal rail —— */
.dm-topic-grid {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 4vw, 2.75rem);
}

.dm-topic-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  background: var(--dm-white);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 0.25rem;
  box-shadow:
    0 4px 6px rgba(15, 23, 42, 0.04),
    0 12px 32px rgba(37, 99, 235, 0.06);
  overflow: hidden;
  position: relative;
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

@media (min-width: 576px) {
  .dm-topic-card {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dm-topic-card {
    transition: none;
  }

  .dm-topic-card:hover,
  .dm-topic-card__lesson:hover,
  .dm-lesson-card:hover,
  .dm-topic-card__link-all:hover {
    transform: none;
  }
}

.dm-topic-card:hover {
  box-shadow: var(--shadow-card-hover, 0 0.5rem 1rem rgba(0, 0, 0, 0.1));
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.22);
}

/* Left “illustration” column — Productly-style icon block */
.dm-topic-card__visual {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.75rem 1.5rem;
  min-width: 0;
}

@media (min-width: 576px) {
  .dm-topic-card__visual {
    width: 160px;
    padding: 2rem 1.35rem;
    border-right: 1px solid var(--dm-border);
  }
}

@media (min-width: 992px) {
  .dm-topic-card__visual {
    width: 200px;
    padding: 2.25rem 1.5rem;
  }

  .dm-topic-card__icon-blob {
    width: 96px;
    height: 96px;
    font-size: 2.4rem;
  }
}

.dm-topic-card__icon-blob {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.25rem;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.dm-topic-card--tone-1 .dm-topic-card__icon-blob {
  background: linear-gradient(145deg, var(--dm-tone-1-a) 0%, var(--dm-tone-1-b) 100%);
}

.dm-topic-card--tone-2 .dm-topic-card__icon-blob {
  background: linear-gradient(145deg, var(--dm-tone-2-a) 0%, var(--dm-tone-2-b) 100%);
}

.dm-topic-card--tone-3 .dm-topic-card__icon-blob {
  background: linear-gradient(145deg, var(--dm-tone-3-a) 0%, var(--dm-tone-3-b) 100%);
}

.dm-topic-card--tone-4 .dm-topic-card__icon-blob {
  background: linear-gradient(145deg, var(--dm-tone-4-a) 0%, var(--dm-tone-4-b) 100%);
}

.dm-topic-card__index {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dm-muted);
}

/* Remove thin top bar — replaced by icon column */
.dm-topic-card__accent {
  display: none;
}

.dm-topic-card__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 0 1.35rem 1.35rem;
}

@media (min-width: 576px) {
  .dm-topic-card__body {
    padding: 1.75rem 1.75rem 1.5rem 1.5rem;
  }
}

@media (min-width: 992px) {
  .dm-topic-card__body {
    padding: 2rem clamp(1.75rem, 3vw, 2.75rem) 1.75rem clamp(1.5rem, 2.5vw, 2.25rem);
  }
}

@media (max-width: 575.98px) {
  .dm-topic-card__visual {
    flex-direction: row;
    justify-content: flex-start;
    width: 100%;
    padding: 1.25rem 1.35rem;
    border-bottom: 1px solid var(--dm-border);
    gap: 1.15rem;
  }

  .dm-topic-card__icon-blob {
    width: 72px;
    height: 72px;
    font-size: 1.85rem;
  }

  .dm-topic-card__index {
    text-align: left;
    align-self: center;
  }
}

.dm-topic-card__eyebrow {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dm-primary);
  margin-bottom: 0.4rem;
}

.dm-topic-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin: 0 0 0.65rem;
}

.dm-topic-card__title a {
  color: var(--dm-text);
  text-decoration: none;
}

.dm-topic-card__title a:hover {
  color: var(--dm-primary);
}

.dm-topic-card__blurb {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--dm-muted);
  margin: 0 0 1.15rem;
}

.dm-topic-card__lessons {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1.15rem;
}

@media (min-width: 992px) {
  .dm-topic-card__lessons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem 1.25rem;
  }
}

.dm-topic-card__lesson {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.85rem clamp(0.75rem, 2vw, 1.15rem);
  padding: 0.9rem clamp(1rem, 2vw, 1.25rem);
  border-radius: 14px;
  text-decoration: none;
  color: var(--dm-text);
  font-size: 0.9375rem;
  font-weight: 600;
  background: var(--dm-cream);
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.dm-topic-card__lesson:hover {
  background: #fff;
  border-color: rgba(37, 99, 235, 0.3);
  transform: translateX(4px);
  color: var(--dm-primary-dark);
}

.dm-topic-card__lesson-ic {
  width: 2.35rem;
  height: 2.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--dm-white);
  color: var(--dm-primary);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  flex-shrink: 0;
}

/* Ordered step number (syllabus topic cards) */
.dm-topic-card__lesson-seq {
  width: 2.35rem;
  height: 2.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
  color: #fff;
  background: linear-gradient(145deg, var(--dm-tone-1-a), var(--dm-tone-1-b));
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

.dm-topic-card--tone-2 .dm-topic-card__lesson-seq {
  background: linear-gradient(145deg, var(--dm-tone-2-a), var(--dm-tone-2-b));
  box-shadow: 0 2px 10px rgba(16, 185, 129, 0.28);
}

.dm-topic-card--tone-3 .dm-topic-card__lesson-seq {
  background: linear-gradient(145deg, var(--dm-tone-3-a), var(--dm-tone-3-b));
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.28);
}

.dm-topic-card--tone-4 .dm-topic-card__lesson-seq {
  background: linear-gradient(145deg, var(--dm-tone-4-a), var(--dm-tone-4-b));
  box-shadow: 0 2px 10px rgba(139, 92, 246, 0.28);
}

.dm-topic-card__lesson-t {
  min-width: 0;
  line-height: 1.4;
}

.dm-topic-card__lesson-m {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--dm-muted);
  flex-shrink: 0;
}

.dm-topic-card__empty {
  padding: 0.5rem 0 0;
  margin: 0;
  font-size: 0.875rem;
}

.dm-topic-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 0.25rem;
}

.dm-topic-card__count {
  font-size: 0.8125rem;
  color: var(--dm-muted);
  font-weight: 600;
}

.dm-topic-card__link-all {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--google-blue) 0%, var(--google-blue-dark) 100%);
  text-decoration: none;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dm-topic-card__link-all:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.42);
}

.dm-topic-card__link-all i {
  font-size: 1rem;
}

.dm-topic-card__footer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.dm-topic-card__quiz-btn {
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
}

.dm-stat-pill--action {
  border-color: rgba(47, 87, 239, 0.35);
  background: rgba(47, 87, 239, 0.06);
  color: var(--dm-primary);
  transition:
    background 0.2s ease,
    transform 0.2s ease,
    color 0.2s ease;
}

.dm-stat-pill--action:hover {
  background: rgba(47, 87, 239, 0.12);
  color: var(--dm-primary-dark, #2446d4);
  transform: translateY(-1px);
}

.dm-stat-pill--action i {
  color: var(--dm-primary);
}

/* —— Topic page: lesson rows use full rail width —— */
.dm-lesson-grid {
  display: flex;
  flex-direction: column;
  gap: clamp(1.1rem, 2vw, 1.4rem);
}

.dm-topic-section-intro__sub {
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* Ordered list + spine: shows clear progression through a topic */
.dm-lesson-sequence {
  display: flex;
  flex-direction: column;
  gap: clamp(1.1rem, 2vw, 1.4rem);
}

.dm-lesson-sequence__item {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: clamp(0.85rem, 2vw, 1.25rem);
  list-style: none;
}

.dm-lesson-sequence__track {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 3.5rem;
  flex-shrink: 0;
}

.dm-lesson-sequence__index {
  width: 3.25rem;
  height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
  color: #fff;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  z-index: 1;
}

.dm-lesson-sequence__index--tone-1 {
  background: linear-gradient(145deg, var(--dm-tone-1-a), var(--dm-tone-1-b));
}

.dm-lesson-sequence__index--tone-2 {
  background: linear-gradient(145deg, var(--dm-tone-2-a), var(--dm-tone-2-b));
}

.dm-lesson-sequence__index--tone-3 {
  background: linear-gradient(145deg, var(--dm-tone-3-a), var(--dm-tone-3-b));
}

.dm-lesson-sequence__index--tone-4 {
  background: linear-gradient(145deg, var(--dm-tone-4-a), var(--dm-tone-4-b));
}

.dm-lesson-sequence__spine {
  flex: 1 1 auto;
  width: 3px;
  min-height: 1.25rem;
  margin-top: 0.4rem;
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    rgba(37, 99, 235, 0.5) 0%,
    rgba(6, 182, 212, 0.15) 100%
  );
}

.dm-lesson-card--in-sequence {
  flex: 1;
  min-width: 0;
}

.dm-lesson-card--in-sequence::before {
  display: none;
}

.dm-lesson-card__step {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dm-muted);
  margin: 0 0 0.35rem;
}

.dm-lesson-card {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 1.5rem);
  padding: clamp(1.25rem, 2.5vw, 1.5rem) clamp(1.35rem, 3vw, 2rem);
  background: var(--pl-card-bg, #fffefe);
  border: 1px solid var(--pl-card-border, rgba(0, 0, 0, 0.125));
  border-radius: var(--radius-card, 0.7rem);
  box-shadow: var(--shadow-card, 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075));
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

@media (prefers-reduced-motion: reduce) {
  .dm-lesson-card {
    transition: none;
  }
}

.dm-lesson-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  border-radius: var(--radius-card, 0.7rem) 0 0 var(--radius-card, 0.7rem);
}

.dm-lesson-card--tone-1::before {
  background: linear-gradient(180deg, var(--dm-tone-1-a), var(--dm-tone-1-b));
}

.dm-lesson-card--tone-2::before {
  background: linear-gradient(180deg, var(--dm-tone-2-a), var(--dm-tone-2-b));
}

.dm-lesson-card--tone-3::before {
  background: linear-gradient(180deg, var(--dm-tone-3-a), var(--dm-tone-3-b));
}

.dm-lesson-card--tone-4::before {
  background: linear-gradient(180deg, var(--dm-tone-4-a), var(--dm-tone-4-b));
}

.dm-lesson-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow-card-hover, 0 0.5rem 1rem rgba(0, 0, 0, 0.1));
  border-color: rgba(37, 99, 235, 0.25);
}

.dm-lesson-card:hover .dm-lesson-card__go {
  color: var(--dm-primary);
  transform: scale(1.12);
}

.dm-lesson-card__num {
  width: 3.25rem;
  height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: #fff;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.dm-lesson-card--tone-1 .dm-lesson-card__num {
  background: linear-gradient(145deg, var(--dm-tone-1-a), var(--dm-tone-1-b));
}

.dm-lesson-card--tone-2 .dm-lesson-card__num {
  background: linear-gradient(145deg, var(--dm-tone-2-a), var(--dm-tone-2-b));
}

.dm-lesson-card--tone-3 .dm-lesson-card__num {
  background: linear-gradient(145deg, var(--dm-tone-3-a), var(--dm-tone-3-b));
}

.dm-lesson-card--tone-4 .dm-lesson-card__num {
  background: linear-gradient(145deg, var(--dm-tone-4-a), var(--dm-tone-4-b));
}

.dm-lesson-card__body {
  flex: 1;
  min-width: 0;
}

.dm-lesson-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--dm-text);
  margin: 0 0 0.4rem;
}

.dm-lesson-card--in-sequence .dm-lesson-card__title {
  margin-bottom: 0.35rem;
}

.dm-lesson-card:hover .dm-lesson-card__title {
  color: var(--dm-primary-dark);
}

.dm-lesson-card__meta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: var(--dm-muted);
  margin: 0;
  font-weight: 600;
}

.dm-lesson-card__meta i {
  font-size: 0.95rem;
  color: var(--dm-primary);
  opacity: 0.9;
}

.dm-lesson-card__go {
  font-size: 2rem;
  color: #e8eaed;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

.dm-topic-back-wrap {
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--dm-border);
}

.dm-topic-section-intro {
  text-align: center;
  margin-bottom: 1.75rem;
}

.dm-topic-section-intro .dm-syllabus-eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dm-primary);
  margin-bottom: 0.35rem;
}

.dm-topic-section-intro h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  margin: 0;
  letter-spacing: -0.02em;
}

.dm-topic-card__lesson:focus-visible,
.dm-lesson-card:focus-visible,
.dm-topic-card__link-all:focus-visible {
  outline: 2px solid var(--dm-primary);
  outline-offset: 3px;
}

.dm-lesson-card:focus-visible {
  border-color: rgba(37, 99, 235, 0.45);
}

/* Enrollment: locked lesson rows (syllabus + topic) */
.dm-topic-card__lesson--locked {
  cursor: default;
  opacity: 0.72;
  pointer-events: none;
}

.dm-lesson-card--locked {
  cursor: default;
  opacity: 0.8;
  pointer-events: none;
}

/* Account: expandable bundle rows */
.dm-account-bundle summary {
  cursor: pointer;
  list-style: none;
}

.dm-account-bundle summary::-webkit-details-marker {
  display: none;
}