:root {
  --blog-bg: var(--bg-primary, #0f0f13);
  --blog-surface: var(--bg-secondary, #161824);
  --blog-text: var(--text-primary, #e9eaf0);
  --blog-muted: var(--text-muted, #a2a8b3);
  --blog-border: rgba(124, 128, 149, 0.28);
  --blog-accent: var(--accent-violet, #7c5cff);
  --blog-accent-contrast: #ffffff;
  --blog-maxw: min(72rem, 100%);
  --blog-radius: 16px;
  --blog-shadow: 0 10px 35px rgba(8, 10, 25, 0.28);
}

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

html {
  font-size: 17px;
}

body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 10% 15%, rgba(76, 141, 255, 0.06), transparent 42%),
    radial-gradient(circle at 90% 0%, rgba(127, 90, 240, 0.12), transparent 55%),
    var(--blog-bg);
  color: var(--blog-text);
  line-height: 1.65;
}

a {
  color: var(--blog-accent);
  text-decoration: none;
  transition: color 0.2s ease, filter 0.2s ease;
}

a:hover {
  text-decoration: underline;
  filter: drop-shadow(0 0 12px rgba(127, 90, 240, 0.2));
}

a:focus-visible {
  outline: 2px solid var(--blog-accent);
  outline-offset: 3px;
}

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

main {
  padding: clamp(2.5rem, 4vw, 3.5rem) 1.5rem 4rem;
}

.layout {
  margin: 0 auto;
  max-width: var(--blog-maxw);
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3rem);
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 15, 19, 0.85);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--blog-border);
}

.header-inner {
  max-width: var(--blog-maxw);
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  background: linear-gradient(120deg, var(--accent-electric, #4c8dff), var(--accent-violet, #6d5dfc));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  color: rgba(233, 234, 240, 0.85);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--blog-accent);
}

.breadcrumbs {
  margin: 0 auto;
  max-width: var(--blog-maxw);
  padding: 1.5rem 1.5rem 0;
  font-size: 0.95rem;
  color: var(--blog-muted);
}

.breadcrumbs ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.breadcrumbs li::after {
  content: "›";
  margin-left: 0.75rem;
  color: rgba(233, 234, 240, 0.5);
}

.breadcrumbs li:last-of-type::after {
  display: none;
}

.breadcrumbs a {
  color: rgba(233, 234, 240, 0.85);
}

.page-intro {
  margin: 0 auto;
  max-width: var(--blog-maxw);
  padding: 2rem 1.5rem 0;
  display: grid;
  gap: 0.75rem;
}

.page-intro h1 {
  margin: 0;
  font-size: clamp(2rem, 2.8vw + 1rem, 2.75rem);
  letter-spacing: -0.02em;
}

.page-intro p {
  margin: 0;
  max-width: 72ch;
  color: var(--blog-muted);
  font-size: 1.05rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--blog-surface);
  border: 1px solid var(--blog-border);
  border-radius: var(--blog-radius);
  padding: 1.75rem;
  display: grid;
  gap: 0.85rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(127, 90, 240, 0.5);
  box-shadow: var(--blog-shadow);
}

.card time {
  font-size: 0.9rem;
  color: var(--blog-muted);
}

.card h2 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.4;
}

.card p {
  margin: 0;
  color: rgba(233, 234, 240, 0.78);
}

.card .category {
  justify-self: flex-start;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(127, 90, 240, 0.4);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(233, 234, 240, 0.85);
  background: rgba(127, 90, 240, 0.14);
}

.sidebar {
  position: sticky;
  top: 110px;
  align-self: start;
  display: grid;
  gap: 1.25rem;
}

.sidebar-section {
  background: var(--blog-surface);
  border: 1px solid var(--blog-border);
  border-radius: var(--blog-radius);
  padding: 1.5rem;
  display: grid;
  gap: 0.75rem;
}

.sidebar-section h2 {
  margin: 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(233, 234, 240, 0.72);
}

.sidebar a {
  color: rgba(233, 234, 240, 0.88);
}

.sidebar a:hover {
  color: var(--blog-accent);
}

.resource-list {
  display: grid;
  gap: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--blog-border);
  border-radius: var(--blog-radius);
  overflow: hidden;
  margin: 1.5rem 0;
  background: var(--blog-surface);
}

table th,
table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--blog-border);
}

table tr:nth-child(even) {
  background: rgba(22, 24, 36, 0.6);
}

table th {
  font-weight: 600;
  color: rgba(233, 234, 240, 0.9);
}

footer.site-footer {
  border-top: 1px solid var(--blog-border);
  background: rgba(15, 15, 22, 0.85);
  backdrop-filter: blur(18px);
  padding: 2rem 1.5rem 2.5rem;
}

.footer-inner {
  max-width: var(--blog-maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  color: rgba(233, 234, 240, 0.7);
}

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

.footer-links a {
  color: rgba(233, 234, 240, 0.78);
}

.footer-links a:hover {
  color: var(--blog-accent);
}

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

  .sidebar {
    position: static;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  main {
    padding-inline: 1.25rem;
  }

  .card {
    padding: 1.4rem;
  }

  .page-intro {
    padding-inline: 1.25rem;
  }

  .breadcrumbs {
    padding-inline: 1.25rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}