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

:root {
  --bg: #0b0d14;
  --bg-2: #0f1117;
  --surface: #161a24;
  --surface-2: #1d2230;
  --border: #262a3a;
  --border-strong: #323749;
  --accent: #4f8ef7;
  --accent-2: #7a5af5;
  --accent-3: #22d3ee;
  --accent-dim: rgba(79,142,247,.12);
  --accent-strong: #6ea4ff;
  --text: #e8ecf5;
  --text-muted: #8891aa;
  --text-dim: #c0c8dc;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 22px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  padding: 0 16px 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  background-image:
    radial-gradient(1100px 500px at 80% -10%, rgba(122,90,245,.08), transparent 60%),
    radial-gradient(900px 400px at -10% 15%, rgba(79,142,247,.08), transparent 60%);
  background-attachment: fixed;
}

a { color: var(--accent); }

/* ─── Header ──────────────────────────────────────────── */
header.site {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 0 28px;
}

.app-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,.25);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 18px;
  letter-spacing: .04em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background .15s;
}

.app-tag:hover { background: rgba(79,142,247,.18); }

h1 {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.08;
  color: #fff;
  background: linear-gradient(135deg, #fff 0%, #a5b8da 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.meta {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-dim);
  max-width: 620px;
}

nav.doc-nav {
  max-width: 960px;
  margin: 26px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border);
}

nav.doc-nav a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background .15s, color .15s, border-color .15s;
}

nav.doc-nav a.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(79,142,247,.35);
}

nav.doc-nav a:not(.active) {
  background: var(--surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

nav.doc-nav a:not(.active):hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text);
}

/* ─── Main container ─────────────────────────────────── */
main {
  max-width: 960px;
  margin: 36px auto 0;
}

/* ─── Blog index ─────────────────────────────────────── */

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: block;
}

/* Featured post (first card full width) */
.post-featured {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 0;
  background: linear-gradient(135deg, rgba(79,142,247,.12), rgba(122,90,245,.08) 60%, transparent);
  border: 1px solid rgba(79,142,247,.25);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 36px;
  text-decoration: none;
  color: inherit;
  transition: transform .15s, border-color .15s, box-shadow .15s;
  position: relative;
  overflow: hidden;
}

.post-featured::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(122,90,245,.35), transparent 70%);
  pointer-events: none;
  filter: blur(20px);
}

.post-featured:hover {
  border-color: rgba(79,142,247,.5);
  transform: translateY(-2px);
  box-shadow: 0 20px 50px -20px rgba(79,142,247,.35);
}

.post-featured .featured-content { position: relative; z-index: 1; }

.post-featured .featured-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 6px;
  padding: 4px 12px;
  margin-bottom: 16px;
}

.post-featured h3 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -.015em;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 12px;
}

.post-featured p {
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 18px;
}

.post-featured .post-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.post-featured .featured-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

.featured-visual .icon-card {
  width: 160px;
  height: 200px;
  background: linear-gradient(145deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  box-shadow: 0 20px 50px -20px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.04) inset;
  transform: rotate(-4deg);
  transition: transform .2s;
}

.post-featured:hover .featured-visual .icon-card {
  transform: rotate(-2deg) translateY(-4px);
}

.featured-visual .icon-card .lock-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px -8px rgba(79,142,247,.5);
}

.featured-visual .icon-card .label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.featured-visual .icon-card .lines {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 72%;
}

.featured-visual .icon-card .lines span {
  height: 4px;
  background: var(--border-strong);
  border-radius: 999px;
}

.featured-visual .icon-card .lines span:nth-child(2) { width: 85%; }
.featured-visual .icon-card .lines span:nth-child(3) { width: 60%; }

/* Regular post grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  text-decoration: none;
  color: inherit;
  transition: transform .12s, border-color .15s, background .15s;
  min-height: 100%;
}

.post-card:hover {
  border-color: rgba(79,142,247,.45);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.post-card .post-kicker {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,.25);
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.post-card.lang-it .post-kicker {
  color: #a78bfa;
  background: rgba(167,139,250,.1);
  border-color: rgba(167,139,250,.25);
}

.post-card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: #fff;
  line-height: 1.32;
  margin-bottom: 10px;
}

.post-card p {
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.55;
  flex-grow: 1;
}

.post-card .post-meta {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.post-card .arrow {
  margin-left: auto;
  color: var(--accent);
  opacity: 0;
  transition: opacity .15s, transform .15s;
}

.post-card:hover .arrow {
  opacity: 1;
  transform: translateX(2px);
}

/* ─── Article body ───────────────────────────────────── */
article.post {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(26px, 4vw, 50px);
  margin-bottom: 20px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

article.post .kicker {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,.25);
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

article.post h1 {
  font-size: clamp(28px, 4.5vw, 40px);
  margin-bottom: 16px;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, #fff 0%, #c8d2e8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.12;
}

article.post .byline {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

article.post .lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 22px;
}

article.post h2 {
  font-size: 23px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.015em;
  margin: 40px 0 14px;
}

article.post h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin: 28px 0 10px;
}

article.post p {
  color: var(--text-dim);
  margin-bottom: 16px;
}

article.post ul,
article.post ol {
  color: var(--text-dim);
  padding-left: 24px;
  margin-bottom: 18px;
}

article.post ul li,
article.post ol li {
  margin-bottom: 8px;
}

article.post strong { color: var(--text); }

article.post a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(79,142,247,.3);
}

article.post a:hover { border-bottom-color: var(--accent); }

article.post blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  padding: 14px 18px;
  margin: 18px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
  font-size: 15px;
}

article.post .callout {
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,.25);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
  color: var(--text-dim);
  font-size: 15px;
}

article.post .callout strong { color: var(--text); }

article.post .callout.warning {
  background: rgba(247, 147, 79, .08);
  border-color: rgba(247, 147, 79, .3);
}

article.post .callout.warning strong { color: #f7b47a; }

article.post hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ─── Steps block ────────────────────────────────────── */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0 !important;
  margin: 22px 0 !important;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 16px 18px 16px 60px !important;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px !important;
  color: var(--text-dim);
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px -4px rgba(79,142,247,.4);
}

.steps li strong { color: var(--text); }

/* ─── CTA block ──────────────────────────────────────── */
.cta-block {
  background: linear-gradient(135deg, rgba(79,142,247,.18), rgba(122,90,245,.08) 70%);
  border: 1px solid rgba(79,142,247,.3);
  border-radius: var(--radius);
  padding: 30px;
  margin: 36px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(122,90,245,.25), transparent 60%);
  pointer-events: none;
}

.cta-block > * { position: relative; z-index: 1; }

.cta-block h3 {
  color: #fff !important;
  font-size: 22px !important;
  margin: 0 0 8px !important;
  letter-spacing: -.01em;
}

.cta-block p {
  color: var(--text-dim);
  margin-bottom: 20px !important;
  font-size: 15px;
}

.cta {
  display: inline-block;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff !important;
  font-weight: 600;
  font-size: 15px;
  border-radius: 12px;
  border: none !important;
  text-decoration: none !important;
  transition: filter .15s, transform .05s, box-shadow .15s;
  box-shadow: 0 10px 28px -10px rgba(79,142,247,.55);
}

.cta:hover { filter: brightness(1.08); box-shadow: 0 14px 32px -10px rgba(79,142,247,.7); }
.cta:active { transform: scale(.98); }

/* ─── Related posts ──────────────────────────────────── */
.related {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.related h2 {
  font-size: 12px !important;
  font-weight: 700 !important;
  letter-spacing: .1em !important;
  text-transform: uppercase !important;
  color: var(--text-muted) !important;
  margin: 0 0 16px !important;
  background: none !important;
  -webkit-text-fill-color: var(--text-muted) !important;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.related-grid a {
  display: block;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text) !important;
  font-size: 14px;
  line-height: 1.45;
  font-weight: 500;
  border-bottom: 1px solid var(--border) !important;
  transition: border-color .15s, background .15s;
}

.related-grid a:hover {
  border-color: rgba(79,142,247,.45) !important;
  background: var(--surface-2);
}

/* ─── TL;DR box ──────────────────────────────────────── */
.tldr {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 0 0 28px;
  font-size: 15px;
  color: var(--text-dim);
}

.tldr strong { color: var(--text); }

/* ─── Footer ─────────────────────────────────────────── */
footer {
  max-width: 960px;
  margin: 50px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

footer a { color: var(--accent); text-decoration: none; }

/* ─── Responsive ─────────────────────────────────────── */
@media (max-width: 720px) {
  body { font-size: 16px; }
  article.post .lead { font-size: 16px; }
  article.post h2 { font-size: 20px; }
  .post-card { padding: 22px; }
  .post-card h3 { font-size: 18px; }

  .post-featured {
    grid-template-columns: 1fr;
    padding: 28px 24px;
  }
  .post-featured .featured-visual {
    display: none;
  }
}