/**
 * Udemy-inspired marketplace chrome — Phase 10
 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --mp-bg: #f7f9fa;
  --mp-surface: #ffffff;
  --mp-text: #1c1d1f;
  --mp-muted: #6a6f73;
  --mp-border: #d1d7dc;
  --mp-accent: #2d6a4f;
  --mp-accent-hover: #1b4332;
  --mp-radius: 4px;
  --mp-shadow: 0 2px 4px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.08);
  --mp-font: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

body {
  font-family: var(--mp-font);
  background: var(--mp-bg);
  color: var(--mp-text);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--mp-surface);
  border-bottom: 1px solid var(--mp-border);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: 1180px;
}

.nav-actions .nav-link {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--mp-text);
  padding: 0.35rem 0.5rem;
}

.nav-actions .nav-link:hover {
  color: var(--mp-accent);
  text-decoration: none;
}

.mp-section {
  padding: 2rem 0 3rem;
}

.loading-inline {
  text-align: center;
  color: var(--mp-muted);
  padding: 2rem;
}

.mp-section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mp-page-hero {
  background: var(--mp-surface);
  border-bottom: 1px solid var(--mp-border);
  padding: 1.5rem 0 2rem;
}

.mp-breadcrumb {
  font-size: 0.875rem;
  color: var(--mp-muted);
  margin-bottom: 0.75rem;
}

.mp-breadcrumb a {
  color: var(--mp-accent);
}

.mp-breadcrumb-sep {
  margin: 0 0.35rem;
  color: var(--mp-border);
}

.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.catalog-filter-chip {
  border: 1px solid var(--mp-border);
  background: var(--mp-surface);
  color: var(--mp-text);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.catalog-filter-chip.is-active {
  background: var(--mp-text);
  color: #fff;
  border-color: var(--mp-text);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.catalog-grid--featured {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.course-card {
  background: var(--mp-surface);
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease;
}

.course-card:hover {
  box-shadow: var(--mp-shadow);
}

.course-card-thumb {
  display: block;
  aspect-ratio: 16 / 9;
  background: var(--thumb, var(--mp-accent));
  position: relative;
  text-decoration: none;
}

.course-card-thumb:hover {
  text-decoration: none;
  opacity: 0.95;
}

.course-card-level {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
}

.course-card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.35rem;
}

.course-card-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
}

.course-card-title a {
  color: inherit;
  text-decoration: none;
}

.course-card-title a:hover {
  color: var(--mp-accent);
}

.course-card-desc {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--mp-muted);
  line-height: 1.4;
  flex: 1;
}

.course-card-meta {
  font-size: 0.75rem;
  color: var(--mp-muted);
}

.course-tag {
  display: inline-block;
  margin-left: 0.25rem;
  color: var(--mp-accent);
}

.course-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  width: fit-content;
}

.course-badge--enrolled {
  background: #e8f5e9;
  color: var(--mp-accent);
}

.course-badge--done {
  background: #d1ecf1;
  color: #0c5460;
}

.course-badge--locked {
  background: #f8f9fa;
  color: var(--mp-muted);
}

.course-card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid #f0f0f0;
}

.course-card-fee {
  font-size: 1rem;
  color: var(--mp-text);
}

.course-card-cta {
  font-size: 0.8125rem;
}

.course-card-cta--muted {
  font-size: 0.75rem;
  color: var(--mp-muted);
}

.catalog-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--mp-muted);
}

.cert-detail-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  align-items: start;
}

.cert-detail-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.cert-detail-desc {
  font-size: 1.05rem;
  color: var(--mp-muted);
  margin-bottom: 1.5rem;
}

.cert-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.75rem 0 0.75rem;
}

.cert-outcomes {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--mp-text);
}

.cert-outcomes li {
  margin-bottom: 0.35rem;
}

.syllabus-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  background: var(--mp-surface);
}

.syllabus-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--mp-border);
  font-size: 0.9rem;
}

.syllabus-item:last-child {
  border-bottom: none;
}

.syllabus-meta {
  color: var(--mp-muted);
  font-size: 0.8125rem;
}

.cert-progress {
  height: 6px;
  background: #e9ecef;
  border-radius: 3px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.cert-progress-bar {
  height: 100%;
  background: var(--mp-accent);
}

.purchase-panel-inner {
  position: sticky;
  top: 5rem;
  background: var(--mp-surface);
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  padding: 1.25rem;
  box-shadow: var(--mp-shadow);
}

.purchase-price {
  font-size: 2rem;
  font-weight: 700;
}

.purchase-fee-note {
  font-size: 0.8125rem;
  color: var(--mp-muted);
  margin: 0.25rem 0 1rem;
}

.purchase-stats {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  font-size: 0.875rem;
  color: var(--mp-muted);
}

.purchase-stats li {
  margin-bottom: 0.35rem;
}

.purchase-stats strong {
  color: var(--mp-text);
}

.purchase-trust {
  font-size: 0.75rem;
  color: var(--mp-muted);
  margin-top: 1rem;
  margin-bottom: 0;
}

.purchase-note {
  font-size: 0.875rem;
  color: var(--mp-muted);
  margin-bottom: 0.75rem;
}

.site-footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .cert-detail-grid {
    grid-template-columns: 1fr;
  }

  .purchase-panel-inner {
    position: static;
  }

  .site-footer .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .catalog-grid,
  .catalog-grid--featured {
    grid-template-columns: 1fr;
  }

  .site-footer .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Learning player */
.learn-player {
  background: var(--mp-bg);
  min-height: calc(100vh - 120px);
  padding-bottom: 4.5rem;
}

.learn-player-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

.learn-loading {
  text-align: center;
  padding: 3rem;
  color: var(--mp-muted);
}

.learn-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  align-items: start;
  margin-top: 1rem;
}

.learn-sidebar-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mp-muted);
}

.learn-lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  background: var(--mp-surface);
  max-height: 70vh;
  overflow-y: auto;
}

.learn-lesson-item a {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  padding: 0.65rem 0.75rem;
  text-decoration: none;
  color: var(--mp-text);
  font-size: 0.875rem;
  border-bottom: 1px solid var(--mp-border);
}

.learn-lesson-item:last-child a {
  border-bottom: none;
}

.learn-lesson-item.is-active a {
  background: #f0f9f4;
  font-weight: 600;
  color: var(--mp-accent);
}

.learn-lesson-item.is-done .learn-lesson-check {
  color: var(--mp-accent);
}

.learn-lesson-check {
  flex-shrink: 0;
  width: 1.1rem;
  color: var(--mp-muted);
  font-size: 0.75rem;
}

.learn-main {
  background: var(--mp-surface);
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  padding: 1.25rem 1.5rem;
}

.learn-lesson-heading {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.learn-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--mp-border);
  margin-bottom: 1rem;
}

.learn-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 0.65rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--mp-muted);
  margin-bottom: -1px;
}

.learn-tab.is-active {
  color: var(--mp-text);
  border-bottom-color: var(--mp-accent);
}

.learn-theory-prose {
  line-height: 1.65;
  font-size: 0.95rem;
}

.learn-theory-prose p {
  margin: 0 0 1rem;
}

.learn-pdf {
  margin-top: 1.25rem;
}

.learn-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0d0d0d;
  border-radius: var(--mp-radius);
  overflow: hidden;
}

.learn-video-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.learn-exam-cta {
  margin-top: 1.5rem;
  padding: 1rem;
  background: #e8f5e9;
  border-radius: var(--mp-radius);
  border: 1px solid #b7e4c7;
}

.learn-complete-bar {
  display: none;
}

.learn-mobile-select {
  display: none;
  margin: 0.75rem 0;
}

.learn-mobile-select-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--mp-muted);
}

.learn-mobile-select select {
  width: 100%;
  padding: 0.5rem;
  font-family: inherit;
  font-size: 0.9rem;
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
}

.learn-progress-wrap {
  margin-bottom: 0.5rem;
}

.learn-progress-label {
  font-size: 0.8rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  color: var(--mp-muted);
}

.continue-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.continue-card {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1rem;
  background: var(--mp-surface);
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  overflow: hidden;
}

.continue-card-thumb {
  background: var(--thumb, var(--mp-accent));
  min-height: 100%;
}

.continue-card-body {
  padding: 1rem 1rem 1rem 0;
}

.continue-card-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.dashboard-profile--compact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--mp-border);
  margin-bottom: 0.5rem;
}

.dashboard-profile--compact p {
  margin: 0;
}

@media (max-width: 768px) {
  .learn-sidebar--desktop {
    display: none;
  }

  .learn-mobile-select {
    display: block;
  }

  .learn-layout {
    grid-template-columns: 1fr;
  }

  .learn-complete-bar {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    padding: 0.75rem 1rem;
    background: var(--mp-surface);
    border-top: 1px solid var(--mp-border);
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
  }

  .learn-player {
    padding-bottom: 5rem;
  }

  .continue-card {
    grid-template-columns: 1fr;
  }

  .continue-card-thumb {
    min-height: 80px;
  }

  .continue-card-body {
    padding: 0 1rem 1rem;
  }
}

/* Pay + result — marketplace chrome */
.mp-pay-card,
.mp-result-card {
  background: var(--mp-surface);
  border: 1px solid var(--mp-border);
  border-radius: var(--mp-radius);
  padding: 1.5rem;
  max-width: 560px;
}

.result-upsell {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--mp-border);
}

.catalog-grid--upsell {
  grid-template-columns: 1fr;
  max-width: 420px;
}

.result-actions {
  margin-top: 1.25rem;
}