:root {
  --ink: #17152b;
  --muted: #656174;
  --paper: #ffffff;
  --bg: #faf8ff;
  --line: #e6e0f2;
  --purple: #6c3ce9;
  --purple-dark: #2a2050;
  --purple-soft: #f0eafd;
  --orange: #ff7847;
  --green: #168447;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 17px/1.75 "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; height: auto; }
a { color: var(--purple); }
a:hover { color: var(--purple-dark); }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(23, 21, 43, .96);
  backdrop-filter: blur(12px);
  color: #fff;
}
.site-nav .wrap {
  max-width: 1080px;
  min-height: 58px;
  margin: 0 auto;
  padding: .65rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 850;
  letter-spacing: -.02em;
}
.nav-links { display: flex; flex-wrap: wrap; gap: .85rem; }
.nav-links a { color: #ded8f5; text-decoration: none; font-size: .83rem; font-weight: 700; }
.nav-links a:hover { color: #fff; }

.article-hero {
  color: #fff;
  background:
    radial-gradient(circle at 85% 10%, rgba(139, 92, 246, .65), transparent 30%),
    linear-gradient(145deg, #17152b, #2a2050 65%, #5a32c7);
  padding: clamp(3rem, 8vw, 6rem) 1.1rem;
}
.article-hero .inner { max-width: 840px; margin: 0 auto; }
.eyebrow {
  margin: 0 0 .7rem;
  color: #ffb499;
  font-size: .75rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.article-hero h1 {
  max-width: 18ch;
  margin: 0 0 1rem;
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}
.article-hero .lead {
  max-width: 680px;
  margin: 0;
  color: #ded8f5;
  font-size: clamp(1rem, 2.3vw, 1.2rem);
}
.meta { margin-top: 1rem; color: #bdb4df; font-size: .82rem; }

.article-layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.4rem 1.1rem 4.5rem;
  display: grid;
  grid-template-columns: minmax(0, 720px) minmax(230px, 1fr);
  gap: 2.5rem;
  align-items: start;
}
.article {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(1.2rem, 4vw, 2.4rem);
  box-shadow: 0 10px 35px rgba(42, 32, 80, .07);
}
.article h2 {
  margin: 2.3rem 0 .7rem;
  color: var(--purple-dark);
  font-size: clamp(1.45rem, 4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -.025em;
}
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 1.6rem 0 .35rem; line-height: 1.35; }
.article p { margin: .6rem 0 1rem; }
.article li { margin-bottom: .5rem; }
.article strong { color: var(--purple-dark); }
.article blockquote {
  margin: 1.3rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--orange);
  background: #fff4ef;
  border-radius: 0 12px 12px 0;
  font-weight: 700;
}
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: .85rem 1rem .85rem 3.6rem;
  margin-bottom: .7rem;
  background: var(--purple-soft);
  border-radius: 13px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: .9rem;
  top: .72rem;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--purple);
  font-size: .85rem;
  font-weight: 850;
}
.example {
  margin: .8rem 0;
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fcfbff;
}
.example b { display: block; color: var(--purple); font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; }
.note {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid #aee3c2;
  border-radius: 13px;
  background: #effbf4;
  color: #155f36;
}

.side-card {
  position: sticky;
  top: 78px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: 0 10px 35px rgba(42, 32, 80, .08);
}
.side-card img { display: block; width: 100%; aspect-ratio: 2 / 1; object-fit: cover; }
.side-card .body { padding: 1rem; }
.side-card h2 { margin: 0 0 .5rem; font-size: 1.15rem; line-height: 1.3; }
.side-card p { margin: 0 0 .9rem; color: var(--muted); font-size: .9rem; line-height: 1.55; }
.button {
  display: inline-block;
  width: 100%;
  padding: .75rem 1rem;
  color: #fff;
  background: var(--orange);
  border-radius: 999px;
  text-align: center;
  text-decoration: none;
  font-weight: 850;
}
.button:hover { color: #fff; filter: brightness(.96); }

.related {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.related h2 { margin-top: 0; font-size: 1.25rem; }
.related a { display: block; margin: .55rem 0; font-weight: 750; }

.site-footer {
  padding: 2rem 1.1rem;
  color: #cfc8e7;
  background: var(--ink);
  text-align: center;
  font-size: .82rem;
}
.site-footer a { color: #fff; }

@media (max-width: 820px) {
  .article-layout { grid-template-columns: 1fr; }
  .side-card { position: static; }
  .side-card { display: grid; grid-template-columns: 150px 1fr; }
  .side-card img { height: 100%; aspect-ratio: auto; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .site-nav .wrap { align-items: flex-start; flex-direction: column; }
  .nav-links { gap: .55rem .85rem; }
  .article-hero { padding-top: 2.6rem; }
  .side-card { display: block; }
  .side-card img { aspect-ratio: 2 / 1; }
}