/* ============================================================
   newsletter.css – AI Insider section
   ============================================================ */
.nl { position: relative; overflow: hidden; }
.nl__glow {
  position: absolute; z-index: 0; pointer-events: none;
  left: -14vw; top: 10%;
  width: 54vw; height: 54vw; max-width: 760px; max-height: 760px;
  background: radial-gradient(circle, rgba(139,92,246,.16) 0%, rgba(34,211,238,.06) 45%, transparent 70%);
  filter: blur(50px);
}
.nl .section__inner { position: relative; z-index: 1; }

.nl__grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) 1.15fr;
  gap: 72px;
  align-items: start;
  margin-top: 34px;
}

/* ---------- left: the masthead ---------- */
.nl__eyebrow { color: var(--muted); margin-bottom: 18px; }

.nl__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.4vw, 4.2rem);
  font-weight: 700; letter-spacing: -.03em; line-height: .95;
  margin: 0;
  display: flex; flex-wrap: wrap; gap: .22em;
}
.nl__title-a {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nl__title-b { color: var(--text); }

.nl__sub {
  font-family: var(--font-display);
  font-size: 1.16rem; color: var(--muted);
  margin: 10px 0 0; letter-spacing: .01em;
}
.nl__desc { margin: 20px 0 0; color: var(--muted); max-width: 42ch; }

.nl__stats {
  list-style: none; margin: 30px 0 32px; padding: 0;
  display: flex; gap: 44px;
}
.nl__stats li { display: flex; flex-direction: column; gap: 6px; }
.nl__num {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.4vw, 2.5rem);
  font-weight: 700; line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nl__stats b {
  font-weight: 400; font-size: .68rem;
  letter-spacing: .14em; color: var(--muted);
}

/* ---------- right: the archive ---------- */
.nl__rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.nl__row { border-bottom: 1px solid var(--line); }
.nl__row a {
  display: grid;
  grid-template-columns: 54px 1fr auto 26px;
  align-items: baseline;
  gap: 18px;
  padding: 20px 4px;
  position: relative;
  transition: padding-left .35s cubic-bezier(.65,0,.35,1);
}
.nl__row a::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, rgba(139,92,246,.10), transparent 60%);
  opacity: 0; transition: opacity .35s;
  pointer-events: none;
}
.nl__row a:hover { padding-left: 16px; }
.nl__row a:hover::before { opacity: 1; }

.nl__no {
  font-size: .72rem; letter-spacing: .08em;
  color: var(--violet-bright);
  transition: color .3s;
}
.nl__row a:hover .nl__no { color: var(--cyan); }

.nl__ttl {
  font-size: 1.02rem; color: var(--text);
  line-height: 1.35;
  transition: color .3s;
}
.nl__date { font-size: .68rem; letter-spacing: .1em; color: var(--muted); white-space: nowrap; }
.nl__arrow {
  color: var(--muted); text-align: right;
  transform: translate(-4px, 4px); opacity: 0;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), opacity .3s, color .3s;
}
.nl__row a:hover .nl__arrow { opacity: 1; transform: translate(0, 0); color: var(--cyan); }

.nl__all {
  display: inline-block; margin-top: 24px;
  font-size: .72rem; letter-spacing: .12em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 4px;
  transition: color .3s, border-color .3s;
}
.nl__all:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .nl__grid { grid-template-columns: 1fr; gap: 46px; }
  .nl__desc { max-width: none; }
}
@media (max-width: 620px) {
  .nl__row a {
    grid-template-columns: 46px 1fr 20px;
    grid-template-areas: "no ttl arw" ".  date date";
    gap: 6px 14px;
    padding: 16px 2px;
  }
  .nl__no { grid-area: no; }
  .nl__ttl { grid-area: ttl; font-size: .96rem; }
  .nl__date { grid-area: date; }
  .nl__arrow { grid-area: arw; opacity: .5; transform: none; }
  .nl__stats { gap: 30px; }
  .nl .btn { width: 100%; }
}