:root {
  --color-ink: #17212b;
  --color-muted: #66717d;
  --color-light: #f5f8fa;
  --color-border: #dce4e9;
  --color-brand: #146c94;
  --color-brand-dark: #0d3f5c;
  --color-accent: #e6a23c;
  --color-accent-light: #fff4df;
  --color-white: #ffffff;

  --radius-small: 0.5rem;
  --radius-medium: 1rem;
  --radius-large: 1.5rem;

  --shadow-soft: 0 0.75rem 2rem rgba(20, 45, 65, 0.08);
  --shadow-card: 0 1rem 3rem rgba(20, 45, 65, 0.1);

  --content-width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-white);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.articles-shell {
  width: min(100% - 3rem, var(--content-width));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid rgba(220, 228, 233, 0.7);
  background: var(--color-white);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: min(100% - 3rem, var(--content-width));
  min-height: 5.25rem;
  margin-inline: auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-brand-dark);
  font-size: 1rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.site-logo__image {
  display: block;
  width: auto;
  height: 3.0rem; /* 36px, matching the original logo mark */
}
/*
.site-logo__mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.7rem;
  color: var(--color-white);
  background: var(--color-brand-dark);
  font-size: 1.1rem;
}*/

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.site-nav a {
  text-decoration: none;
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav__active {
  color: var(--color-brand);
}

/* Typography */

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--color-brand);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  line-height: 1.3;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.3rem);
}

h3 {
  margin-bottom: 0.8rem;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
}

/* Buttons and links */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button--small {
  min-height: 2.55rem;
  padding: 0.6rem 1rem;
  font-size: 0.82rem;
}

.button--dark {
  color: var(--color-white);
  background: var(--color-brand-dark);
}

.button--dark:hover,
.button--dark:focus-visible {
  background: var(--color-brand);
}

.button--light {
  color: var(--color-brand-dark);
  background: var(--color-white);
}

.button--light:hover,
.button--light:focus-visible {
  color: var(--color-white);
  background: var(--color-brand);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-brand);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--color-brand-dark);
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.text-link--light {
  color: rgba(255, 255, 255, 0.88);
}

.text-link--light:hover,
.text-link--light:focus-visible {
  color: var(--color-white);
}

/* Hero */

.articles-hero {
  position: relative;
  overflow: hidden;
  color: var(--color-white);
  background:
    linear-gradient(120deg, rgba(8, 42, 64, 0.98), rgba(20, 108, 148, 0.9)),
    url("/images/network-hero.webp") center / cover;
}

.articles-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  align-items: center;
  gap: 5rem;
  min-height: 31rem;
  padding-top: clamp(4rem, 9vw, 7rem);
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

.articles-hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.articles-hero .eyebrow {
  color: #a9e4ff;
}

.articles-hero h1 {
  max-width: 760px;
  margin-bottom: 1.4rem;
  font-size: clamp(2.7rem, 7vw, 5.8rem);
  line-height: 1;
}

.articles-hero__intro {
  max-width: 620px;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.83);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.articles-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

.articles-hero__glow {
  position: absolute;
  width: 24rem;
  height: 24rem;
  border-radius: 50%;
  opacity: 0.18;
  filter: blur(8px);
  pointer-events: none;
}

.articles-hero__glow--one {
  top: -12rem;
  right: 7%;
  background: #67c8f0;
}

.articles-hero__glow--two {
  bottom: -16rem;
  left: 35%;
  background: var(--color-accent);
}

.hero-stat-card {
  position: relative;
  z-index: 1;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.hero-stat-card__icon {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  margin-bottom: 2rem;
  border-radius: 50%;
  color: var(--color-brand-dark);
  background: var(--color-accent);
  font-size: 1.3rem;
}

.hero-stat-card__label {
  margin-bottom: 0.35rem;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-stat-card__number {
  margin-bottom: 0.3rem;
  color: var(--color-white);
  font-size: 3.7rem;
  font-weight: 850;
  line-height: 1;
}

.hero-stat-card__text {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.92rem;
}

/* Introduction */

.articles-introduction {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: 5rem;
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.articles-introduction h2 {
  max-width: 480px;
  margin-bottom: 0;
}

.articles-introduction > p {
  max-width: 560px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 1.12rem;
}

/* Section headings */

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.75rem;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading__rule {
  flex: 1;
  height: 1px;
  margin-bottom: 0.55rem;
  background: var(--color-border);
}

/* Featured article */

.featured-section {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.featured-card {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  overflow: hidden;
  border-radius: var(--radius-large);
  background: var(--color-light);
  box-shadow: var(--shadow-soft);
}

.featured-card__image {
  position: relative;
  min-height: 25rem;
}

.featured-card__image::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(135deg, rgba(13, 63, 92, 0.05), rgba(13, 63, 92, 0.5));
}

.featured-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-card__badge {
  position: absolute;
  z-index: 1;
  top: 1.5rem;
  left: 1.5rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--color-brand-dark);
  background: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.featured-card__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(2rem, 6vw, 4.5rem);
}

.featured-card__content h3 {
  max-width: 520px;
  margin-bottom: 1rem;
  font-size: clamp(1.8rem, 3.5vw, 3rem);
}

.featured-card__content h3 a,
.article-card h3 a {
  text-decoration: none;
}

.featured-card__content h3 a:hover,
.featured-card__content h3 a:focus-visible,
.article-card h3 a:hover,
.article-card h3 a:focus-visible {
  color: var(--color-brand);
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.featured-card__content > p {
  max-width: 480px;
  margin-bottom: 1.75rem;
  color: var(--color-muted);
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.3rem;
  color: var(--color-brand);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.article-card__meta span + span::before {
  margin-right: 0.5rem;
  color: var(--color-border);
  content: "•";
}


/* Article cards */

.article-library {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.section-heading--library {
  align-items: center;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.article-card {
  display: flex;
  min-height: 22rem;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-soft);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
}

.article-card--blue {
  color: var(--color-white);
  background: var(--color-brand);
  border-color: var(--color-brand);
}

.article-card--gold {
  background: var(--color-accent-light);
  border-color: #f1d39b;
}

.article-card--dark {
  color: var(--color-white);
  background: var(--color-brand-dark);
  border-color: var(--color-brand-dark);
}

.article-card--light {
  background: var(--color-light);
}

.article-card__top,
.article-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.article-card__number {
  color: var(--color-accent);
  font-size: 1.25rem;
  font-weight: 850;
}

.article-card__category {
  padding: 0.4rem 0.7rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  opacity: 0.78;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-card h3 {
  max-width: 430px;
  margin-top: 2.5rem;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
}

.article-card p {
  max-width: 430px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.article-card--blue p,
.article-card--dark p {
  color: rgba(255, 255, 255, 0.76);
}

.article-card__footer {
  margin-top: 2.5rem;
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.article-card--blue .article-card__footer,
.article-card--dark .article-card__footer {
  color: rgba(255, 255, 255, 0.72);
}

.article-card__arrow {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  color: var(--color-brand-dark);
  background: var(--color-white);
  font-size: 1.2rem;
  text-decoration: none;
  transition: transform 160ms ease;
}

.article-card__arrow:hover,
.article-card__arrow:focus-visible {
  transform: translateX(4px);
}

/* ADDED article-card IMAGE -- NOTE SURE THAT I NEED -- BG-Image Below */
.article-card--image {
  padding: 0;
  overflow: hidden;
}

.article-card__image {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.article-card__image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 220ms ease;
}

.article-card--image:hover .article-card__image img {
  transform: scale(1.04);
}

.article-card__body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-height: 290px;
  padding: 1.5rem;
}

.article-card__body .article-card__footer {
  margin-top: auto;
}


/* BG-Image for article-card */

.article-card--image-bg {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-height: 360px;
  overflow: hidden;
  color: #fff;
  background-image: var(--card-image);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

/* Overlay improves text contrast */
.article-card--image-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(
      180deg,
      rgba(8, 15, 30, 0.35) 0%,
      rgba(8, 15, 30, 0.72) 62%,
      rgba(8, 15, 30, 0.94) 100%
    );
}

.article-card--image-bg .article-card__top,
.article-card--image-bg .article-card__content,
.article-card--image-bg .article-card__footer {
  position: relative;
  z-index: 1;
}

.article-card--image-bg .article-card__content {
  margin-top: auto;
}

.article-card--image-bg h3,
.article-card--image-bg h3 a,
.article-card--image-bg p,
.article-card--image-bg .article-card__footer {
  color: #fff;
}

.article-card--image-bg h3 a:hover {
  color: #fff;
  text-decoration: underline;
}

.article-card--image-bg:hover {
  background-position: center;
}

.article-card--image-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255, 255, 255, 0);
  transition: background 220ms ease;
}

.article-card--image-bg:hover::after {
  background: rgba(255, 255, 255, 0.06);
}

/* END of BG-Image */



/* Topics */

.topics-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 5rem;
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.topics-section__content p:last-child {
  max-width: 420px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
}

.topic-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-brand-dark);
  font-weight: 750;
  text-decoration: none;
  transition:
    color 160ms ease,
    padding 160ms ease;
}

.topic-link:nth-child(odd) {
  margin-right: 1.5rem;
}

.topic-link:hover,
.topic-link:focus-visible {
  padding-right: 0.5rem;
  color: var(--color-brand);
}

/* CTA */

.articles-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 6vw, 4.5rem);
  border-radius: var(--radius-large);
  color: var(--color-white);
  background:
    linear-gradient(135deg, rgba(13, 63, 92, 0.98), rgba(20, 108, 148, 0.94)),
    url("/images/security-pattern.webp") center / cover;
}

.articles-cta .eyebrow {
  color: #a9e4ff;
}

.articles-cta h2 {
  margin-bottom: 0.65rem;
  color: var(--color-white);
}

.articles-cta p:last-child {
  max-width: 540px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-light);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 6rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer a {
  color: var(--color-brand-dark);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-brand);
  text-decoration: underline;
}

/* Accessibility */

.articles-page a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* Responsive layout */

@media (max-width: 850px) {
  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .articles-hero__inner,
  .articles-introduction,
  .topics-section {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .articles-hero__inner {
    min-height: auto;
  }

  .hero-stat-card {
    max-width: 22rem;
  }

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

  .featured-card__image {
    min-height: 18rem;
  }
}

@media (max-width: 620px) {
  .articles-shell,
  .site-header__inner {
    width: min(100% - 2rem, var(--content-width));
  }

  .site-nav {
    gap: 1rem;
    font-size: 0.8rem;
  }

  .site-nav .button {
    display: none;
  }

  .articles-hero h1 {
    font-size: clamp(2.5rem, 13vw, 4rem);
  }

  .articles-hero__actions,
  .articles-cta {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  .section-heading__rule {
    width: 100%;
  }

  .featured-card__content {
    padding: 2rem 1.5rem;
  }

  .article-grid,
  .topic-list {
    grid-template-columns: 1fr;
  }

  .topic-link:nth-child(odd) {
    margin-right: 0;
  }

  .site-footer__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
  }
}

.article-library__intro {
  max-width: 680px;
  margin: -1rem 0 4rem;
  color: var(--color-muted, #667085);
}

.article-topic + .article-topic {
  margin-top: 6rem;
}

.article-topic__heading {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.article-topic__heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.2;
}

.article-topic__heading .eyebrow {
  margin: 0;
}

/*
.article-topic__heading h3 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2rem);
}*/

.article-card h4 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.2;
}

.article-card h4 a {
  color: inherit;
  text-decoration: none;
}

.article-card h4 a:hover {
  text-decoration: underline;
}

@media (max-width: 700px) {
  .article-topic__heading {
    display: block;
  }

/*
  .article-topic__heading h3 {
    margin-top: 0.5rem;
  }*/
}