/* Shared add-ons for the four 2026-10-08 intro pages (stacklink, retrace, sourcescore, stillery).
   Builds on product-intro.css: same glass (.g), same accent tokens (--ac, --ac-hi). Only these four pages load it. */
.b4-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.b4-cards.four{grid-template-columns:repeat(4,1fr)}
.b4-cards.two{grid-template-columns:repeat(2,1fr)}
.b4-card{padding:24px 22px;text-align:left}
.b4-card .n{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:10px;font-size:13px;font-weight:800;
  color:var(--ac-hi);background:color-mix(in srgb,var(--ac) 14%,transparent);border:1px solid color-mix(in srgb,var(--ac) 40%,transparent)}
.b4-card h3{margin:14px 0 0;font-size:18px;font-weight:700;letter-spacing:-.01em;color:#fff}
.b4-card p{margin:8px 0 0;font-size:14.5px;line-height:1.55;color:var(--mut)}
.b4-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:26px auto 0;max-width:820px;padding:0;list-style:none}
.b4-tags li{font-size:13px;font-weight:600;color:#e8eefc;padding:8px 14px;border-radius:999px;border:1px solid var(--edge);background:rgba(255,255,255,.035)}
.b4-tags li em{font-style:normal;color:rgba(226,234,250,.55);font-weight:500}

/* pricing */
.b4-plans{display:grid;grid-template-columns:repeat(var(--cols,3),minmax(0,1fr));gap:14px;align-items:stretch}
.b4-plan{display:flex;flex-direction:column;padding:24px 20px 22px;text-align:left}
.b4-plan.hl{border-color:color-mix(in srgb,var(--ac) 55%,transparent);box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 26px 60px -30px color-mix(in srgb,var(--ac) 70%,transparent)}
.b4-plan .k{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--ac-hi)}
.b4-plan h3{margin:8px 0 0;font-size:19px;font-weight:700;color:#fff;letter-spacing:-.01em}
.b4-plan .pr{margin:12px 0 0;display:flex;align-items:baseline;flex-wrap:wrap;gap:6px}
.b4-plan .pr b{font-size:34px;font-weight:800;letter-spacing:-.03em;color:#fff;line-height:1}
.b4-plan .pr span{font-size:13.5px;font-weight:600;color:rgba(226,234,250,.62)}
.b4-plan .alt{margin:6px 0 0;font-size:13px;color:rgba(226,234,250,.7)}
.b4-plan ul{margin:16px 0 0;padding:0;list-style:none;display:grid;gap:8px}
.b4-plan li{position:relative;padding-left:20px;font-size:14px;line-height:1.45;color:#dfe6f6}
.b4-plan li::before{content:"";position:absolute;left:2px;top:.5em;width:7px;height:7px;border-radius:50%;background:var(--ac);box-shadow:0 0 8px color-mix(in srgb,var(--ac) 70%,transparent)}
.b4-note{margin:22px auto 0;max-width:760px;text-align:center;font-size:13.5px;line-height:1.6;color:rgba(226,234,250,.62)}
.b4-note a{color:var(--ac-hi)}
.b4-mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.6;color:#dfe6f6;white-space:pre;overflow-x:auto;
  margin:0;padding:22px;border-radius:21px;-webkit-overflow-scrolling:touch}
.b4-split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}
.b4-split .txt{text-align:left}
.b4-split .txt h3{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.1;letter-spacing:-.02em;font-weight:800;color:#fff}
.b4-split .txt p{margin:14px 0 0;font-size:16px;line-height:1.6;color:var(--mut)}

@media (max-width:1020px){
  .b4-cards.four{grid-template-columns:repeat(2,1fr)}
  .b4-plans{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .b4-cards,.b4-cards.four,.b4-cards.two,.b4-plans,.b4-split{grid-template-columns:1fr}
  .b4-card{padding:20px 18px}
  .b4-plan .pr b{font-size:30px}
}