/* ==========================================================================
   HKEMS-STMO · Article / content pages
   ========================================================================== */

.article-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 72ch);
  justify-content: center;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
  padding-block: clamp(20px, 3vw, 40px) clamp(40px, 6vw, 72px);
}

@media (max-width: 1020px) {
  .article-layout {
    grid-template-columns: minmax(0, 72ch);
  }
}

/* table of contents */
.toc {
  position: sticky;
  top: calc(var(--app-bar-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: 20px;
  border-radius: var(--shape-xl);
}

.toc__title {
  font: var(--font-label-md);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
  margin-bottom: 4px;
}

.toc__link {
  display: block;
  padding: 6px 10px;
  border-radius: var(--shape-sm);
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
  border-left: 2px solid transparent;
  transition:
    color var(--dur-short3) var(--ease-standard),
    background-color var(--dur-short3) var(--ease-standard),
    border-color var(--dur-short3) var(--ease-standard);
}

.toc__link:hover {
  color: var(--md-on-surface);
  background: color-mix(in srgb, var(--md-on-surface) 6%, transparent);
}

.toc__link.is-active {
  color: var(--md-primary);
  border-left-color: var(--md-primary);
  background: color-mix(in srgb, var(--md-primary) 9%, transparent);
}

@media (max-width: 1020px) {
  .toc {
    display: none;
  }
}

/* prose */
.article {
  max-width: 72ch;
  margin-inline: 0;
}

.article > * + * {
  margin-top: var(--space-4);
}

.article h2 {
  margin-top: clamp(28px, 5vw, 48px);
  font: var(--font-headline-sm);
  letter-spacing: var(--tracking-tight);
  scroll-margin-top: calc(var(--app-bar-height) + 24px);
}

.article h3 {
  margin-top: var(--space-7);
  font: var(--font-title-lg);
  scroll-margin-top: calc(var(--app-bar-height) + 24px);
}

.article p {
  font: var(--font-body-lg);
  color: var(--md-on-surface-variant);
}

.article strong {
  color: var(--md-on-surface);
  font-weight: 600;
}

.article ul,
.article ol {
  padding-left: 1.3em;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--md-on-surface-variant);
  font: var(--font-body-lg);
}

.article li::marker {
  color: var(--md-primary);
}

.article blockquote {
  padding: 18px 22px;
  border-left: 3px solid var(--md-primary);
  border-radius: 0 var(--shape-md) var(--shape-md) 0;
  background: color-mix(in srgb, var(--md-primary) 7%, transparent);
  color: var(--md-on-surface);
  font: var(--font-title-md);
}

.article figure {
  margin: clamp(24px, 4vw, 40px) 0;
}

.article figure img,
.article figure video {
  width: 100%;
  border-radius: var(--shape-xl);
  border: 1px solid var(--glass-border-soft);
  box-shadow: var(--elev-2);
  background: var(--md-surface-container-high);
}

.article figcaption {
  margin-top: 10px;
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
  text-align: center;
}

.article__divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: clamp(32px, 5vw, 56px) 0;
  color: var(--md-outline);
}

.article__divider::before,
.article__divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--md-outline-variant);
}

/* article header */
.article-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-bottom: clamp(16px, 3vw, 28px);
  margin-bottom: clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--md-outline-variant);
}

.article-head__kicker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.article-head__title {
  font: var(--font-display-sm);
  letter-spacing: var(--tracking-tight);
  max-width: 24ch;
}

.article-head__lead {
  font: var(--font-body-lg);
  color: var(--md-on-surface-variant);
  max-width: 68ch;
}

.article-head__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  font: var(--font-label-md);
  color: var(--md-on-surface-variant);
}

.article-head__meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-head__meta .icon {
  width: 16px;
  height: 16px;
}

/* product / merch grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 24px);
  margin: clamp(24px, 3vw, 36px) 0;
}

@media (max-width: 700px) {
  .product-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.product {
  display: flex;
  flex-direction: column;
  border-radius: var(--shape-xl);
  overflow: hidden;
}

.product__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--md-surface-container-high);
  overflow: hidden;
}

.product__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-long2) var(--ease-emphasized-decel);
}

.product:hover .product__media img {
  transform: scale(1.05);
}

.product__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 22px 24px;
}

.product__name {
  font: var(--font-title-lg);
}

.product__spec {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
}

.product__price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font: var(--font-headline-sm);
  color: var(--md-primary);
  font-variant-numeric: tabular-nums;
}

.product__price small {
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
}

.product__note {
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
  padding-top: 10px;
  border-top: 1px dashed var(--md-outline-variant);
}

.product--video .product__media {
  aspect-ratio: 16 / 9;
}

.product--video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* download card */
.download-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 20px 24px;
  border-radius: var(--shape-xl);
  color: var(--md-on-surface);
  transition:
    transform var(--dur-medium1) var(--ease-standard),
    box-shadow var(--dur-medium1) var(--ease-standard);
}

.download-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--elev-3);
  color: var(--md-on-surface);
}

.download-card__icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: var(--shape-md);
  background: color-mix(in srgb, var(--md-primary) 14%, transparent);
  color: var(--md-primary);
}

.download-card__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.download-card__text strong {
  font: var(--font-title-md);
}

.download-card__text span {
  font: var(--font-body-sm);
  color: var(--md-on-surface-variant);
}

/* article footer nav */
.article-foot {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: clamp(32px, 5vw, 56px);
}

@media (max-width: 640px) {
  .article-foot {
    grid-template-columns: minmax(0, 1fr);
  }
}

.article-foot a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border-radius: var(--shape-lg);
  color: var(--md-on-surface);
}

.article-foot a span {
  font: var(--font-label-md);
  color: var(--md-on-surface-variant);
}

.article-foot a strong {
  font: var(--font-title-sm);
}

.article-foot a:hover {
  color: var(--md-primary);
}

/* related list */
.related {
  margin-top: clamp(40px, 6vw, 72px);
}

.related__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (max-width: 860px) {
  .related__grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* photo collage inside article */
.photo-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 20px);
  margin: clamp(24px, 4vw, 40px) 0;
}

@media (max-width: 560px) {
  .photo-row {
    grid-template-columns: minmax(0, 1fr);
  }
}

.photo-row figure {
  margin: 0;
}

.photo-row img {
  width: 100%;
  border-radius: var(--shape-lg);
  border: 1px solid var(--glass-border-soft);
  box-shadow: var(--elev-1);
}

/* video embed (click to load) */
.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--shape-xl);
  overflow: hidden;
  background: var(--md-surface-container-high);
  border: 1px solid var(--glass-border-soft);
}

.video-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.video-embed__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
  color: var(--md-on-surface);
  background: var(--md-surface-container-high);
}

.video-embed__placeholder .icon {
  width: 44px;
  height: 44px;
  color: var(--md-primary);
}

.video-embed__placeholder small {
  font: var(--font-label-md);
  color: var(--md-on-surface-variant);
}