:root {
  --color-bg: #f5f7fb;
  --color-surface: rgba(255, 255, 255, 0.82);
  --color-surface-strong: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #667085;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.16);
  --color-accent: #2f6fed;
  --color-accent-hover: #1d4ed8;
  --color-code-bg: #f3f6fb;
  --color-soft-blue: #dbe7fb;
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 14px 36px rgba(15, 23, 42, 0.08);
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(163, 191, 250, 0.24), transparent 34%),
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.8), transparent 26%),
    linear-gradient(180deg, #f7f9fd 0%, #f4f7fb 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(247, 249, 253, 0.8);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.15rem 0;
  gap: var(--spacing-md);
}

.logo {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.78rem;
}

.logo-mark {
  height: 36px;
  width: auto;
  display: block;
}

nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.35rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

nav a:hover,
.text-link:hover,
.toc a:hover {
  color: var(--color-accent);
}

.hero {
  padding: 5.5rem 0 3rem;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.8fr);
  gap: var(--spacing-xl);
  align-items: stretch;
}

.hero-copy h1,
.hero h1 {
  font-size: clamp(2.8rem, 5vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  max-width: 10ch;
  margin-bottom: var(--spacing-md);
}

.hero-copy p,
.hero p {
  font-size: 1.14rem;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 0.75rem;
  font-weight: 700;
}

.hero-note,
.hero-spotlight,
.category-stat,
.toc,
.newsletter,
.featured-card {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
}

.hero-note {
  margin-top: var(--spacing-md);
  max-width: 680px;
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
}

.hero-spotlight {
  border-radius: calc(var(--radius-lg) + 4px);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.hero-spotlight::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(47, 111, 237, 0.18), transparent 40%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(219, 231, 251, 0.62));
  z-index: -1;
}

.spotlight-label {
  color: var(--color-accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-spotlight h2 {
  font-size: 2rem;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 0.8rem;
}

.hero-spotlight p {
  font-size: 1rem;
  margin-bottom: 1.2rem;
}

.section {
  padding: 3.2rem 0;
}

.section-tight {
  padding-top: 0;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--spacing-md);
  margin-bottom: 1.7rem;
}

.section-heading p {
  color: var(--color-text-secondary);
  max-width: 600px;
}

.split-heading {
  align-items: center;
}

.section-title {
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 0.4rem;
}

.ticker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.ticker span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 999px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.card:hover,
.category-link:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(15, 23, 42, 0.12);
  border-color: rgba(47, 111, 237, 0.2);
}

.card-visual,
.article-hero {
  position: relative;
  overflow: hidden;
  background-color: #dfe8f8;
}

.card-visual {
  min-height: 220px;
}

.card-visual::before,
.article-hero::before,
.hero-category::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(8, 15, 28, 0.12), transparent 45%),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.35), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.26), transparent 18%);
}

.card-visual::after,
.article-hero::after,
.hero-category::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: calc(var(--radius-md) - 2px);
  opacity: 0.75;
}

.card-visual-tag,
.article-hero-label {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 2;
  color: #ffffff;
  text-shadow: 0 1px 18px rgba(15, 23, 42, 0.5);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card-body {
  padding: 1.25rem 1.35rem 1.4rem;
}

.card-category {
  font-size: 0.8rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.55rem;
}

.card-title {
  font-size: 1.45rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem;
}

.card-excerpt,
.card-meta,
.category-link p,
.newsletter p,
.article-meta,
.article-intro,
.footer-links a,
footer,
.article-content p,
.toc a,
.category-stat {
  color: var(--color-text-secondary);
}

.card-excerpt {
  font-size: 0.97rem;
  margin-bottom: 1rem;
}

.card-meta {
  font-size: 0.88rem;
}

.categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.category-link {
  display: block;
  padding: 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.category-name {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.category-count {
  color: var(--color-accent);
  margin-bottom: 0.65rem;
  font-size: 0.9rem;
}

.category-stat {
  padding: 0.8rem 1rem;
}

.newsletter {
  margin: 1rem 0 4rem;
  padding: 3rem 0;
  border-radius: 28px;
  text-align: center;
}

.newsletter h2 {
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 0.8rem;
}

.newsletter-form {
  display: flex;
  max-width: 520px;
  margin: 1.2rem auto 0;
  gap: 0.8rem;
}

.newsletter-input {
  flex: 1;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.92);
  font-family: inherit;
}

.newsletter-input:focus {
  outline: none;
  border-color: rgba(47, 111, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 1.5rem;
  align-items: start;
}

.contact-card {
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-card);
  border-radius: 26px;
  padding: 1.5rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.form-field {
  display: grid;
  gap: 0.45rem;
}

.form-field span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  font: inherit;
  color: var(--color-text);
}

.form-field textarea {
  resize: vertical;
  min-height: 180px;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: rgba(47, 111, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
}

.contact-sidebar {
  display: grid;
  gap: 1rem;
}

.contact-line strong {
  display: block;
  margin-bottom: 0.3rem;
}

.contact-line p {
  color: var(--color-text-secondary);
}

.btn {
  padding: 0.95rem 1.35rem;
  background: linear-gradient(180deg, #4b84f3, #2f6fed);
  color: white;
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  font-family: inherit;
  box-shadow: 0 14px 30px rgba(47, 111, 237, 0.22);
}

.btn:hover {
  transform: translateY(-1px);
  background: linear-gradient(180deg, #4f88f5, #2563eb);
}

.text-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

footer {
  border-top: 1px solid rgba(15, 23, 42, 0.07);
  padding: 2.4rem 0 3.2rem;
  font-size: 0.92rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 1rem;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  text-decoration: none;
}

.hero-category {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  min-height: 320px;
  display: flex;
  align-items: end;
}

.hero-category .container {
  position: relative;
  z-index: 1;
  padding-top: 4rem;
  padding-bottom: 3rem;
}

.hero-category h1 {
  max-width: none;
  margin-bottom: 0.7rem;
}

.article-header {
  padding: 4.8rem 0 1.5rem;
}

.article-category {
  display: inline-block;
  color: var(--color-accent);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.75rem;
  text-decoration: none;
}

.article-title {
  font-size: clamp(2.6rem, 4.4vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
  margin-bottom: 0.9rem;
}

.article-intro {
  font-size: 1.08rem;
  max-width: 58ch;
}

.article-content {
  padding-bottom: 4.5rem;
}

.article-hero {
  min-height: 420px;
  border-radius: 30px;
  margin: 0 0 2rem;
  box-shadow: var(--shadow-soft);
}

.article-hero-overlay {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 2;
  max-width: 320px;
  padding: 1rem 1.1rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(12px);
}

.article-hero-overlay figcaption {
  color: #1f2937;
  font-size: 0.96rem;
}

.article-content h2 {
  font-size: 2rem;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-top: 2.7rem;
  margin-bottom: 1rem;
}

.article-content h3 {
  font-size: 1.35rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-top: 2rem;
  margin-bottom: 0.9rem;
}

.article-content p {
  margin-bottom: 1rem;
  line-height: 1.75;
}

.article-content a {
  color: var(--color-accent);
  text-decoration: none;
}

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

.article-content ul,
.article-content ol {
  margin-bottom: 1rem;
  padding-left: 1.3rem;
}

.article-content li {
  margin-bottom: 0.45rem;
  line-height: 1.75;
}

.article-content code {
  background: rgba(243, 246, 251, 0.9);
  padding: 0.2em 0.42em;
  border-radius: 5px;
  font-size: 0.92em;
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

.article-content pre {
  background: rgba(243, 246, 251, 0.94);
  padding: 1.15rem 1.2rem;
  border-radius: 18px;
  overflow-x: auto;
  margin-bottom: 1.1rem;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content table {
  width: 100%;
}

.toc {
  padding: 1.15rem 1.2rem;
  border-radius: 20px;
  margin-bottom: 1.8rem;
}

.toc h2 {
  font-size: 1.05rem;
  margin: 0 0 0.8rem;
}

.toc ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.toc li + li {
  margin-top: 0.45rem;
}

.toc a {
  text-decoration: none;
}

.related-articles {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  padding-top: 2rem;
  margin-top: 3rem;
}

.related-articles h2 {
  font-size: 1.5rem;
  margin-bottom: 1.1rem;
}

.visual-kubernetes {
  background:
    linear-gradient(140deg, rgba(18, 35, 69, 0.5), rgba(47, 111, 237, 0.1)),
    url("https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-database {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.48), rgba(84, 112, 198, 0.14)),
    url("https://images.unsplash.com/photo-1544383835-bda2bc66a55d?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-deployment {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.48), rgba(44, 120, 117, 0.18)),
    url("https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-observability {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.44), rgba(119, 77, 255, 0.12)),
    url("https://images.unsplash.com/photo-1460925895917-afdab827c52f?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-cloud {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.35), rgba(38, 112, 228, 0.14)),
    url("https://images.unsplash.com/photo-1535223289827-42f1e9919769?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-api {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.44), rgba(63, 131, 248, 0.1)),
    url("https://images.unsplash.com/photo-1555949963-aa79dcee981c?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-security {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.58), rgba(12, 74, 110, 0.16)),
    url("https://images.unsplash.com/photo-1510511459019-5dda7724fd87?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-load-balancing {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.42), rgba(16, 185, 129, 0.1)),
    url("https://images.unsplash.com/photo-1558494949-ef010cbdcc31?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-microservices {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.42), rgba(236, 72, 153, 0.1)),
    url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-redis {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.45), rgba(248, 113, 113, 0.12)),
    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-linkedin {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.42), rgba(47, 111, 237, 0.18)),
    url("https://images.unsplash.com/photo-1516321165247-4aa89a48be28?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-infrastructure {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.32), rgba(59, 130, 246, 0.08)),
    url("https://images.unsplash.com/photo-1516321497487-e288fb19713f?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-devops {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.36), rgba(14, 165, 233, 0.1)),
    url("https://images.unsplash.com/photo-1526379095098-d400fd0bf935?auto=format&fit=crop&w=1600&q=80") center/cover;
}

.visual-performance {
  background:
    linear-gradient(140deg, rgba(17, 24, 39, 0.38), rgba(34, 197, 94, 0.09)),
    url("https://images.unsplash.com/photo-1461749280684-dccba630e2f6?auto=format&fit=crop&w=1600&q=80") center/cover;
}

@media (max-width: 900px) {
  .hero-shell,
  .section-heading,
  .footer-content {
    grid-template-columns: 1fr;
    display: grid;
    align-items: start;
  }

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

  .section-heading {
    gap: 0.75rem;
  }

  .newsletter-form {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .hero {
    padding-top: 4.5rem;
  }

  .hero-copy h1,
  .hero h1,
  .article-title {
    max-width: none;
  }

  .grid,
  .grid-2,
  .categories {
    grid-template-columns: 1fr;
  }

  .header-content,
  nav ul {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-hero {
    min-height: 320px;
  }

  .article-hero-overlay {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    max-width: none;
  }

  .card-visual {
    min-height: 200px;
  }
}