:root {
  --bg: #06111f;
  --bg-deep: #020814;
  --surface: rgba(9, 25, 45, 0.86);
  --surface-2: rgba(15, 39, 68, 0.9);
  --surface-light: rgba(245, 249, 255, 0.07);
  --text: #f5f9ff;
  --muted: #b8c7db;
  --line: rgba(180, 210, 255, 0.16);
  --primary: #4db5ff;
  --primary-dark: #8fd0ff;
  --accent: #e6f4ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --glow: 0 0 34px rgba(77, 181, 255, 0.32);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 16% 8%, rgba(77, 181, 255, 0.22), transparent 28rem),
    radial-gradient(circle at 82% 18%, rgba(143, 208, 255, 0.14), transparent 24rem),
    linear-gradient(180deg, var(--bg), var(--bg-deep) 72%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.45) 0 1px, transparent 1.5px),
    linear-gradient(rgba(77,181,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77,181,255,.035) 1px, transparent 1px);
  background-size: 120px 120px, 48px 48px, 48px 48px;
  opacity: .38;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(2, 8, 20, 0.78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.brand img { width: 150px; filter: drop-shadow(0 0 18px rgba(77,181,255,.32)); }
.nav-links { display: flex; gap: 26px; align-items: center; font-weight: 700; color: var(--muted); }
.nav-links a:hover { color: var(--accent); text-shadow: 0 0 16px rgba(77,181,255,.65); }
.menu-toggle { display: none; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span { display:block; width: 28px; height: 3px; background: var(--text); margin: 5px 0; border-radius: 999px; }

.hero {
  min-height: 78vh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: 80px clamp(20px, 5vw, 72px) 56px;
  max-width: 1280px;
  margin: 0 auto;
}
.eyebrow { font: 700 .78rem/1 JetBrains Mono, monospace; letter-spacing: .14em; text-transform: uppercase; color: var(--primary); margin-bottom: 14px; }
h1 { font-size: clamp(2.45rem, 6vw, 5.4rem); line-height: .98; letter-spacing: -0.07em; max-width: 900px; text-shadow: 0 0 34px rgba(77,181,255,.18); }
.hero-text { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.28rem); max-width: 760px; margin: 26px 0; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn, .newsletter-form button { border: 0; border-radius: 999px; padding: 13px 20px; font-weight: 800; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease; }
.btn:hover, .newsletter-form button:hover { transform: translateY(-2px); }
.btn.primary, .newsletter-form button { color: #02101f; background: linear-gradient(135deg, #f5fbff, var(--primary)); box-shadow: var(--glow); }
.btn.secondary { color: var(--text); background: rgba(255,255,255,.05); border: 1px solid var(--line); }

.featured-card, .post-card, .side-card, .category-card, .resource-grid article, .newsletter {
  background: linear-gradient(180deg, rgba(15, 39, 68, .82), rgba(7, 22, 42, .86));
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.featured-card { padding: 34px; position: relative; overflow: hidden; }
.featured-card:before { content:""; position:absolute; inset: 0 0 auto auto; width: 210px; height: 210px; background: radial-gradient(circle at 70% 20%, rgba(245,249,255,.35), rgba(77,181,255,.18), transparent 70%); border-radius: 0 28px 0 100%; }
.featured-card:after { content:""; position:absolute; inset: auto 24px 24px auto; width: 90px; height: 2px; background: linear-gradient(90deg, transparent, var(--primary), var(--accent)); box-shadow: var(--glow); }
.tag, .post-kicker { display: inline-flex; width: fit-content; font: 700 .78rem JetBrains Mono, monospace; color: #dff2ff; background: rgba(77,181,255,.14); border: 1px solid rgba(143,208,255,.22); padding: 7px 10px; border-radius: 999px; margin-bottom: 16px; }
.featured-card h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); line-height: 1.08; letter-spacing: -0.04em; margin-bottom: 16px; position: relative; }
.featured-card p { color: var(--muted); position: relative; }
.article-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; color: var(--muted); font-size: .92rem; }
.article-meta span + span:before { content:"• "; margin-right: 12px; color: rgba(245,249,255,.45); }

.section { max-width: 1280px; margin: 0 auto; padding: 58px clamp(20px, 5vw, 72px); }
.section.compact { padding-top: 28px; }
.section-heading { text-align: center; margin-bottom: 28px; }
.section-heading.left { text-align: left; }
.section-heading h2 { font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1; letter-spacing: -0.055em; }
.category-grid, .resource-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.category-card { padding: 24px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: rgba(143,208,255,.48); box-shadow: var(--shadow), var(--glow); }
.category-card strong { display: block; font-size: 1.1rem; margin-bottom: 8px; color: var(--accent); }
.category-card span, .post-card p, .side-card p, .resource-grid p, .site-footer p { color: var(--muted); }

.blog-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 28px; align-items: start; }
.content-column { max-width: 700px; }
.post-list { display: grid; gap: 18px; }
.post-card { padding: 20px; transition: transform .2s ease, border-color .2s ease; overflow: hidden; }
.post-card:hover { transform: translateY(-3px); border-color: rgba(143,208,255,.38); }
.post-card.large { padding: 24px; }
.post-card h3 { font-size: clamp(1.1rem, 1.8vw, 1.6rem); line-height: 1.16; letter-spacing: -0.035em; margin-bottom: 12px; word-wrap: break-word; overflow-wrap: break-word; word-break: break-word; }
.post-card h3 a:hover, .popular-list a:hover { color: var(--primary-dark); }
.sidebar { position: sticky; top: 96px; display: grid; gap: 18px; }
.side-card { padding: 24px; }
.side-card h3 { margin-bottom: 12px; color: var(--accent); }
.popular-list { padding-left: 20px; color: var(--muted); }
.popular-list li { margin: 12px 0; }
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tags span { background: rgba(245,249,255,.08); border: 1px solid var(--line); border-radius: 999px; padding: 7px 10px; color: #d8eaff; font-size: .9rem; }
code { font-family: JetBrains Mono, monospace; background: rgba(245,249,255,.08); padding: 2px 5px; border-radius: 6px; color: var(--accent); }

.resources { padding-top: 32px; }
.resource-grid { grid-template-columns: repeat(3, 1fr); }
.resource-grid article { padding: 28px; }
.resource-grid span { font: 800 2rem/1 JetBrains Mono, monospace; color: var(--primary); opacity: .42; }
.resource-grid h3 { margin: 16px 0 8px; color: var(--accent); }

.newsletter { max-width: 1136px; margin: 42px auto; padding: clamp(26px, 5vw, 44px); display: grid; grid-template-columns: 1fr minmax(280px, 430px); gap: 26px; align-items: center; }
.newsletter h2 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.05; letter-spacing: -0.05em; margin-bottom: 10px; }
.newsletter p { color: var(--muted); }
.newsletter-form { display: flex; gap: 10px; background: rgba(245,249,255,.08); border: 1px solid var(--line); padding: 8px; border-radius: 999px; }
.newsletter-form input { flex: 1; min-width: 0; border: 0; background: transparent; padding: 0 12px; outline: none; font: inherit; color: var(--text); }
.newsletter-form input::placeholder { color: rgba(216,234,255,.58); }

.site-footer { max-width: 1280px; margin: 32px auto 0; padding: 34px clamp(20px, 5vw, 72px); border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-weight: 700; }
.footer-links a:hover { color: var(--primary-dark); }

@media (max-width: 920px) {
  .menu-toggle { display: block; }
  .nav-links { position: absolute; inset: 74px 18px auto; display: none; flex-direction: column; align-items: stretch; padding: 18px; background: rgba(7,22,42,.97); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
  .nav-links.active { display: flex; }
  .hero, .blog-layout, .newsletter { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .resource-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 560px) {
  .brand img { width: 122px; }
  .hero { padding-top: 54px; }
  .category-grid { grid-template-columns: 1fr; }
  .newsletter-form { border-radius: 22px; flex-direction: column; }
  .newsletter-form input { padding: 12px; }
}