/* IoT Secure editorial blog — aligned with marketing site tokens */

.blog-page,
.article-page {
  --blog-navy-deep: var(--iot-navy-deep, #001d32);
  --blog-navy-rich: var(--iot-navy, #142b3f);
  --blog-blue: var(--iot-mid-blue, #2f5f82);
  --blog-electric: var(--iot-mid-blue, #2f5f82);
  --blog-ice: var(--iot-light-blue, #eaf1f6);
  --blog-surface: var(--iot-surface, #f7f9ff);
  --blog-white: var(--iot-white, #fff);
  --blog-text: var(--iot-text, #000000);
  --blog-steel: var(--iot-muted, #4f657b);
  --blog-teal: var(--iot-success, #2e9d63);
  --blog-critical: var(--iot-red);
  /* Body copy 17px; smaller tokens for meta labels only */
  --blog-text-xs: 0.875rem;
  --blog-text-sm: 1rem;
  --blog-text-base: 1.0625rem;
  --blog-text-md: 1.1875rem;
  --blog-media-ratio: 16 / 10;
  color: var(--blog-text);
  background: var(--blog-white);
  font-size: var(--blog-text-base);
}

.blog-page .site-main,
.article-page .site-main {
  background: var(--blog-white);
}

.blog-page-top {
  padding: 1.5rem 0 0.5rem;
  background: var(--blog-white);
  border-bottom: 1px solid rgba(20, 43, 63, 0.08);
}

.blog-breadcrumb {
  margin: 0;
  font-size: var(--blog-text-sm);
  font-weight: 600;
}

.blog-breadcrumb a {
  color: var(--blog-text, #000);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.blog-breadcrumb a:hover,
.blog-breadcrumb a:focus-visible {
  color: var(--blog-text, #000);
  text-decoration: underline;
}

.blog-breadcrumb span[aria-hidden="true"] {
  margin: 0 0.4rem;
  color: var(--blog-steel);
}

.blog-breadcrumb span[aria-current="page"] {
  color: var(--blog-navy-rich);
}

.blog-featured {
  padding: 1.75rem 0 0.5rem;
  background: var(--blog-white);
}

.blog-featured-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.95fr);
  gap: 2rem;
  padding: 2rem;
  background: var(--blog-white);
  border: 1px solid rgba(11, 39, 66, 0.1);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(7, 27, 42, 0.08);
}

.blog-featured-card__title {
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.2;
}

.blog-featured-card__title a {
  color: var(--blog-navy-deep);
  text-decoration: none;
}

.blog-featured-card__title a:hover {
  color: var(--blog-blue);
}

.blog-featured-card__excerpt {
  margin: 0 0 1.25rem;
  font-size: var(--blog-text-base);
  line-height: 1.6;
  color: var(--blog-text);
}

.blog-featured-card__cta {
  align-self: flex-start;
  margin-top: 0.25rem;
}

.blog-featured-card__media {
  display: block;
  aspect-ratio: var(--blog-media-ratio);
  overflow: hidden;
  border-radius: 8px;
  background: var(--blog-ice);
}

.blog-featured-card__media a {
  display: block;
  height: 100%;
}

.blog-featured-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
}

.blog-featured-card__graphic {
  width: 100%;
  height: 100%;
  min-height: 220px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blog-ice) 0%, #c5dff5 100%);
}

.blog-section-label {
  margin: 0 0 1rem;
  font-size: var(--blog-text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blog-steel);
}

.blog-listing__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.25rem;
}

.blog-listing__page-note {
  margin: 0;
  font-size: var(--blog-text-sm);
  color: var(--blog-steel);
}

.blog-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(20, 43, 63, 0.1);
}

.blog-pagination__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-pagination__num,
.blog-pagination__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  min-height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: var(--iot-radius-sm, 2px);
  border: 1px solid rgba(20, 43, 63, 0.15);
  background: var(--blog-white);
  color: var(--blog-navy-rich);
  font-size: var(--blog-text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.blog-pagination__num:hover,
.blog-pagination__btn:hover {
  background: var(--blog-ice);
  border-color: var(--blog-blue);
  color: var(--blog-navy-rich);
}

.blog-pagination__num.is-current {
  background: var(--blog-navy-rich);
  border-color: var(--blog-navy-rich);
  color: var(--blog-white);
  pointer-events: none;
}

.article-hero__graphic {
  min-height: 220px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blog-ice) 0%, #c5dff5 100%);
}

.blog-card__media {
  display: block;
  aspect-ratio: var(--blog-media-ratio);
  overflow: hidden;
  background: var(--blog-ice);
  flex-shrink: 0;
}

.blog-card__media--empty {
  background: linear-gradient(135deg, var(--blog-ice) 0%, #d8e8f4 100%);
}

.blog-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.blog-listing {
  padding: 2rem 0 3.5rem;
  background: var(--blog-white);
}

.blog-category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.blog-category-filter__btn {
  border: 1px solid rgba(19, 93, 156, 0.25);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  background: var(--blog-white);
  color: var(--blog-navy-rich);
  font-size: var(--blog-text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.blog-category-filter__btn:hover,
.blog-category-filter__btn.is-active {
  background: var(--blog-blue);
  border-color: var(--blog-blue);
  color: var(--blog-white);
}

.blog-category-filter__count {
  opacity: 0.85;
  font-weight: 500;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.blog-grid--related {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--blog-white);
  border: 1px solid rgba(11, 39, 66, 0.08);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.blog-card:hover {
  box-shadow: 0 12px 32px rgba(7, 27, 42, 0.1);
  transform: translateY(-2px);
}

.blog-card.is-hidden {
  display: none;
}

.blog-card__body {
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-category {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: var(--blog-ice);
  color: var(--blog-blue);
  font-size: var(--blog-text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.blog-card-title {
  margin: 0 0 0.65rem;
  font-size: clamp(1.0625rem, 1.5vw, 1.2rem);
  line-height: 1.35;
}

.blog-card-title a {
  color: var(--blog-navy-deep);
  text-decoration: none;
}

.blog-card-title a:hover {
  color: var(--blog-electric);
}

.blog-card-excerpt {
  margin: 0 0 1rem;
  flex: 1;
  font-size: var(--blog-text-base);
  line-height: 1.55;
  color: var(--blog-text);
}

.blog-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
  font-size: var(--blog-text-sm);
  color: var(--blog-steel);
}

.blog-card-meta--on-light {
  color: var(--blog-steel);
}

.blog-card-cta {
  font-size: var(--blog-text-sm);
  font-weight: 700;
  color: var(--blog-blue);
  text-decoration: none;
}

.blog-card-cta:hover {
  color: var(--blog-electric);
  text-decoration: underline;
}

.blog-grid-empty {
  text-align: center;
  color: var(--blog-steel);
  padding: 2rem;
}

.blog-cta-band {
  padding: 2.75rem 0;
  background: linear-gradient(90deg, var(--blog-navy-rich) 0%, var(--blog-blue) 100%);
  color: var(--blog-white);
}

.blog-cta-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.blog-cta-band__title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--blog-white);
}

.blog-cta-band__copy {
  margin: 0;
  max-width: 36rem;
  font-size: var(--iot-font-size-base, 1.0625rem);
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.5;
}

/* Reserve brand red (iot-btn-cta) for rare highlights — blog uses navy/white on bands */
.blog-cta-band .iot-btn {
  background: var(--blog-white);
  color: var(--blog-navy-deep);
  border-color: var(--blog-white);
}

.blog-cta-band .iot-btn:hover,
.blog-cta-band .iot-btn:focus-visible {
  background: var(--blog-ice);
  color: var(--blog-navy-rich);
  border-color: var(--blog-ice);
}

.article-rail-cta .iot-btn {
  background: var(--blog-white);
  color: var(--blog-navy-deep);
  border-color: rgba(255, 255, 255, 0.35);
}

.article-rail-cta .iot-btn:hover,
.article-rail-cta .iot-btn:focus-visible {
  background: var(--blog-ice);
  color: var(--blog-navy-rich);
}

/* Article */
.article-hero {
  padding: 2.5rem 0 2rem;
  background: var(--blog-surface);
  border-bottom: 1px solid rgba(11, 39, 66, 0.08);
}

.article-category {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: var(--blog-ice);
  color: var(--blog-blue);
  font-size: var(--blog-text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 4px;
}

.article-title {
  margin: 0 0 1rem;
  max-width: 20ch;
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--blog-navy-deep);
}

.article-description {
  margin: 0 0 1.25rem;
  max-width: 48rem;
  font-size: var(--blog-text-md);
  line-height: 1.55;
  color: var(--blog-text);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: var(--blog-text-sm);
  color: var(--blog-steel);
}

.article-hero__figure {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 10px;
  background: var(--blog-ice);
}

.article-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: 10px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(240px, 280px);
  gap: 3rem;
  padding: 2.5rem 1.5rem 3.5rem;
  align-items: start;
}

.article-content {
  font-size: var(--blog-text-md);
  line-height: 1.75;
  color: var(--blog-text);
}

.article-content > *:first-child {
  margin-top: 0;
}

.article-content h2 {
  margin: 2.25rem 0 1rem;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--blog-navy-deep);
}

.article-content h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blog-navy-rich);
}

.article-content h4 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.article-content p,
.article-content li {
  margin-bottom: 1rem;
}

.article-content ul,
.article-content ol {
  padding-left: 1.35rem;
}

.article-content a:not(.wp-block-button__link):not(.wp-element-button) {
  color: var(--blog-text, #000);
  font-weight: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.article-content a:not(.wp-block-button__link):not(.wp-element-button):hover,
.article-content a:not(.wp-block-button__link):not(.wp-element-button):focus-visible {
  color: var(--blog-text, #000);
  text-decoration: underline;
}

.article-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--blog-blue);
  background: var(--blog-ice);
  color: var(--blog-navy-rich);
  font-style: normal;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.article-content table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.article-content th,
.article-content td {
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(11, 39, 66, 0.12);
  text-align: left;
  vertical-align: top;
}

.article-content th {
  background: var(--blog-ice);
  font-weight: 700;
}

.article-content pre,
.article-content code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.9em;
}

.article-content pre {
  padding: 1rem;
  overflow-x: auto;
  background: var(--blog-navy-deep);
  color: var(--blog-ice);
  border-radius: 8px;
}

.article-content hr {
  border: 0;
  border-top: 1px solid rgba(11, 39, 66, 0.12);
  margin: 2rem 0;
}

.blog-callout {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  border-left: 4px solid var(--blog-blue);
  background: var(--blog-ice);
}

.blog-callout strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: var(--blog-text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.blog-callout-key {
  border-left-color: var(--blog-electric);
  background: var(--blog-ice);
}

.blog-callout-insight {
  border-left-color: var(--blog-blue);
  background: #e8f2fc;
}

.blog-callout-control {
  border-left-color: var(--blog-navy-rich);
  background: #e2ecf6;
}

.blog-callout-validation {
  border-left-color: var(--blog-teal);
  background: #e6f7f7;
}

.blog-callout-critical {
  border-left-color: var(--blog-critical);
  background: #fdeced;
}

.blog-callout-perspective {
  border-left-color: var(--blog-navy-deep);
  background: var(--blog-surface);
}

.article-rail {
  position: sticky;
  top: 6rem;
}

.article-toc--mobile {
  display: none;
  margin-bottom: 1.5rem;
}

.article-toc__label {
  margin: 0 0 0.75rem;
  font-size: var(--blog-text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blog-steel);
}

.article-toc ol {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--blog-text-sm);
  line-height: 1.5;
}

.article-toc a {
  color: var(--blog-text, #000);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.article-toc a:hover,
.article-toc a:focus-visible {
  color: var(--blog-text, #000);
  text-decoration: underline;
}

.article-toc__l3 {
  margin-left: 0.75rem;
  list-style: circle;
}

.article-share {
  margin: 1.5rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(11, 39, 66, 0.1);
}

.article-share__label {
  margin: 0 0 0.5rem;
  font-size: var(--blog-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--blog-steel);
}

.article-share a {
  display: inline-block;
  margin-right: 0.75rem;
  font-size: var(--blog-text-sm);
  font-weight: 600;
  color: var(--blog-blue);
}

.article-rail-cta {
  padding: 1.25rem;
  background: var(--blog-navy-deep);
  color: var(--blog-white);
  border-radius: 10px;
}

.article-rail-cta__title {
  margin: 0 0 0.5rem;
  font-size: var(--blog-text-base);
  font-weight: 700;
}

.article-rail-cta__copy {
  margin: 0 0 1rem;
  font-size: var(--blog-text-sm);
  line-height: 1.5;
  opacity: 0.9;
}

.iot-btn-cta--block {
  display: block;
  text-align: center;
}

.article-related {
  padding: 2.5rem 0;
  background: var(--blog-surface);
}

.article-related__title {
  margin: 0 0 1.5rem;
  font-size: 1.35rem;
  color: var(--blog-navy-deep);
}

.article-bottom-cta {
  padding: 3rem 0;
  text-align: center;
  background: linear-gradient(180deg, var(--blog-white) 0%, var(--blog-ice) 100%);
}

.article-bottom-cta h2 {
  margin: 0 0 1.25rem;
  max-width: 28ch;
  margin-left: auto;
  margin-right: auto;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  color: var(--blog-navy-deep);
}

.article-bottom-cta__back {
  margin: 1.5rem 0 0;
}

.article-bottom-cta__back a {
  color: var(--blog-text, #000);
  font-weight: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

@media (max-width: 1024px) {
  .blog-featured-card {
    grid-template-columns: 1fr;
  }

  .blog-featured-card__media {
    order: -1;
  }

  .blog-grid,
  .blog-grid--related {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .article-toc--desktop {
    display: none;
  }

  .article-toc--mobile {
    display: block;
  }

  .article-rail {
    position: static;
  }
}

@media (max-width: 640px) {
  .blog-grid,
  .blog-grid--related {
    grid-template-columns: 1fr;
  }

  .blog-page-top {
    padding: 1.25rem 0 0.5rem;
  }
}