/* Hero */
.marketplace-hero {
  position: relative;
  background:
    linear-gradient(110deg, rgba(255, 248, 244, 0.95) 0%, rgba(247, 249, 250, 0.88) 48%, rgba(255, 232, 222, 0.75) 100%),
    radial-gradient(ellipse at 85% 20%, rgba(255, 107, 53, 0.18), transparent 45%),
    linear-gradient(180deg, #FFF8F4 0%, #F7F9FA 100%);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 0 3rem;
  overflow: hidden;
}

.marketplace-hero::after {
  content: "";
  position: absolute;
  right: -4%;
  top: 10%;
  width: min(42vw, 420px);
  height: min(42vw, 420px);
  border-radius: 40% 60% 55% 45%;
  background:
    linear-gradient(145deg, rgba(255, 107, 53, 0.22), rgba(255, 255, 255, 0.05)),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FF6B35' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

.marketplace-hero .marketplace-container {
  position: relative;
  z-index: 1;
}

.marketplace-hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0 0 0.75rem;
  letter-spacing: -0.04em;
  color: var(--text);
}

.marketplace-hero__brand .accent {
  color: var(--brand);
}

.marketplace-hero__headline {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
  max-width: 34rem;
}

.marketplace-hero__lead {
  margin: 0 0 1.35rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 32rem;
}

.marketplace-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* Benefits strip */
.benefits-strip {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1.75rem 0;
}

.benefits-strip__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.benefit-item {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.benefit-item__icon {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  font-size: 1.05rem;
}

.benefit-item h3 {
  font-size: 0.98rem;
  font-weight: 800;
  margin: 0 0 0.2rem;
}

.benefit-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

/* Catalog page */
.catalog-page,
.my-courses-page,
.teachers-page {
  padding: 2.5rem 0 3.5rem;
}

.page-heading {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 800;
  margin: 0 0 0.35rem;
}

/* Course detail */
.course-detail {
  padding-bottom: 3.5rem;
}

.course-detail__header {
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  padding: 2rem 0 2.25rem;
}

.course-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.course-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.course-breadcrumb a:hover {
  color: var(--brand);
}

.course-breadcrumb__current {
  color: var(--text);
  font-weight: 600;
}

.course-detail__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 800;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.course-detail__summary {
  font-size: 1.1rem;
  color: var(--text);
  margin: 0 0 0.75rem;
  max-width: 42rem;
}

.course-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

.course-detail__meta .rating {
  color: var(--rating);
  font-weight: 700;
}

.course-detail__body {
  padding-top: 2rem;
}

.course-detail__section-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  margin: 0 0 1rem;
}

.teacher-card {
  display: block;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.teacher-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
  color: inherit;
}

.teacher-card__label {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--brand);
  margin: 0 0 0.25rem;
}

.buy-box {
  position: sticky;
  top: calc(var(--nav-height) + var(--cat-nav-height) + 1rem);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.buy-box__cover {
  aspect-ratio: 16 / 9;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
}

.buy-box__cover img,
.course-detail-cover__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.buy-box__placeholder,
.course-detail-cover__placeholder {
  width: 100%;
  height: 100%;
  min-height: 160px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--brand);
  background: linear-gradient(135deg, #FFE8DE, #F0F2F4);
}

.buy-box__body {
  padding: 1.25rem;
}

.buy-box__price {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  margin: 0 0 1rem;
}

.buy-box__price.is-free {
  color: var(--brand);
}

.buy-box .btn-brand,
.buy-box .cyber-button {
  width: 100%;
}

.buy-box__note {
  margin: 0.85rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

.progress-box {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-subtle);
  margin-bottom: 1rem;
}

.progress-box--complete {
  border-color: rgba(30, 138, 76, 0.35);
  background: rgba(30, 138, 76, 0.08);
}

.progress-complete {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  color: #1e8a4c;
  margin-bottom: 0.25rem;
}

.progress-box__label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.progress-box__pct {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
}

.progress-box__meta {
  margin-top: 0.45rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.progress-bar-track {
  height: 6px;
  margin-top: 0.55rem;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--brand);
}

.buy-box__cert-hint {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 0.85rem;
  line-height: 1.4;
}

/* Curriculum */
.course-curriculum__item {
  background: var(--bg);
  border: 1px solid var(--border) !important;
  margin-bottom: 0.5rem;
  border-radius: var(--radius) !important;
  overflow: hidden;
}

.course-curriculum .accordion-button {
  background: var(--bg-subtle);
  color: var(--text);
  font-weight: 700;
  box-shadow: none;
}

.course-curriculum .accordion-button:not(.collapsed) {
  background: var(--brand-soft);
  color: var(--text);
}

.course-curriculum .accordion-button:focus {
  box-shadow: 0 0 0 3px var(--brand-soft);
}

.course-curriculum .accordion-button::after {
  filter: none;
}

.course-curriculum__lesson {
  background: var(--bg) !important;
  border-color: var(--border) !important;
  color: var(--text);
}

/* Teachers directory */
.teacher-tile {
  display: block;
  height: 100%;
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.teacher-tile:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  color: inherit;
}

.teacher-tile h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0 0 0.35rem;
}

.teacher-profile-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  margin-bottom: 2rem;
}

.review-card {
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  margin-bottom: 0.85rem;
}

.review-card .rating {
  color: var(--rating);
  font-weight: 700;
}

.my-course-item {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.btn-cert-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.btn-cert-download:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.certificate-verify-page {
  padding: 2.5rem 0 4rem;
  max-width: 720px;
}

.certificate-verify__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 0.5rem;
}

.certificate-verify__lead {
  font-size: 1.05rem;
  color: var(--muted, #6A6F73);
  margin-bottom: 1.75rem;
}

.certificate-verify__details {
  display: grid;
  gap: 1rem;
  margin: 0 0 1.5rem;
}

.certificate-verify__details dt {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted, #6A6F73);
  margin-bottom: 0.2rem;
}

.certificate-verify__details dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.certificate-verify__code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.06em;
}

.certificate-verify--ok {
  border-left: 4px solid #2e9b5a;
  padding-left: 1.25rem;
}

.certificate-verify--bad {
  border-left: 4px solid #c0392b;
  padding-left: 1.25rem;
}

/* Certificate landing (public) */
.certificate-landing__hero {
  position: relative;
  padding: 3.25rem 0 2.5rem;
  background:
    linear-gradient(115deg, rgba(255, 248, 244, 0.97) 0%, rgba(247, 249, 250, 0.92) 55%, rgba(255, 236, 226, 0.88) 100%),
    radial-gradient(ellipse at 90% 10%, rgba(255, 107, 53, 0.16), transparent 42%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.certificate-landing__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2.5rem;
  align-items: center;
}

.certificate-landing__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--text);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.certificate-landing__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 3.5vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  color: var(--text);
}

.certificate-landing__lead {
  font-size: 1.08rem;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: 36rem;
}

.certificate-landing__note {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
  margin: 0 0 1.75rem;
  max-width: 36rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--brand);
  background: rgba(255, 255, 255, 0.55);
}

.certificate-landing__label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
  color: var(--muted);
}

.certificate-landing__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.certificate-landing__input {
  flex: 1 1 12rem;
  min-width: 0;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  background: #fff;
}

.certificate-landing__input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}

.certificate-landing__btn {
  flex: 0 0 auto;
  width: auto !important;
  padding-inline: 1.35rem;
}

.certificate-landing__hint {
  margin: 0.65rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.certificate-landing__preview {
  margin: 0;
  position: relative;
}

.certificate-landing__preview img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 18px 40px rgba(28, 29, 31, 0.12);
}

.certificate-landing__preview figcaption {
  margin-top: 0.65rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

.certificate-landing__steps {
  padding: 2.75rem 0 3.5rem;
}

.certificate-landing__steps-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  margin: 0 0 1.5rem;
}

.certificate-landing__steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.certificate-landing__steps-list li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.certificate-landing__step-num {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
}

.certificate-landing__steps-list strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.certificate-landing__steps-list p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Certificate mine (student view) */
.certificate-mine-page {
  padding-top: 1.5rem;
  padding-bottom: 3rem;
  max-width: 960px;
}

.certificate-mine__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.certificate-mine__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.certificate-mine__preview {
  margin: 0 0 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #111;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.certificate-mine__img {
  display: block;
  width: 100%;
  height: auto;
}

.certificate-mine__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 0 0 1rem;
}

.certificate-mine__meta dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.certificate-mine__meta dd {
  margin: 0;
  font-weight: 700;
  color: var(--text);
}

.certificate-mine__code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.04em;
}

.certificate-mine__verify {
  font-size: 0.88rem;
  word-break: break-all;
}

@media (max-width: 991.98px) {
  .buy-box {
    position: static;
    margin-bottom: 1.5rem;
  }

  .benefits-strip__grid {
    grid-template-columns: 1fr;
  }

  .marketplace-hero {
    padding: 2.5rem 0 2rem;
  }

  .certificate-landing__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .certificate-landing__hero {
    padding: 2.25rem 0 2rem;
  }

  .certificate-landing__steps-list {
    grid-template-columns: 1fr;
  }
}