/* Product-specific guide cards; no changes to the shared site palette. */
.letrunio-guides { margin-top: 80px; padding-top: 52px; border-top: 1px solid var(--line); scroll-margin-top: 30px; }
.letrunio-guides-heading { max-width: 670px; margin-bottom: 32px; }
.letrunio-guides-heading .eyebrow { color: var(--lime); }
.letrunio-guides-heading h2 { margin-top: 16px; font-size: clamp(30px, 3.4vw, 46px); font-weight: 550; letter-spacing: -.045em; line-height: 1.2; }
.letrunio-guides-heading p { margin-top: 16px; color: var(--muted); font-size: 16px; line-height: 1.8; }
.letrunio-guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.letrunio-guide-card { display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); color: var(--ink); transition: border-color .2s, transform .2s; }
.letrunio-guide-card:hover { border-color: var(--lime); transform: translateY(-4px); }
.letrunio-guide-card:focus-visible { outline: 3px solid var(--lime); outline-offset: 5px; }
.letrunio-guide-image { display: block; position: relative; height: 218px; overflow: hidden; background: #20352b; border-bottom: 1px solid var(--line); }
.letrunio-guide-image img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 52%; }
.letrunio-guide-number { position: absolute; left: 18px; top: 18px; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; background: #10191c; color: var(--lime); border: 1px solid #b3c87955; font: 13px var(--mono, monospace); }
.letrunio-guide-copy { display: flex; flex-direction: column; flex: 1; padding: 27px; }
.letrunio-guide-topic { color: var(--lime); font-size: 11px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.letrunio-guide-copy h3 { margin-top: 14px; font-size: 22px; font-weight: 600; line-height: 1.35; letter-spacing: -.025em; }
.letrunio-guide-description { margin: 15px 0 28px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.letrunio-guide-read { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); color: var(--lime); font-size: 13px; font-weight: 650; }
.letrunio-guide-read .icon { width: 20px; height: 20px; }
@media (max-width: 1000px) and (min-width: 741px) {
  .letrunio-guide-grid { gap: 16px; }
  .letrunio-guide-copy { padding: 22px; }
  .letrunio-guide-copy h3 { font-size: 20px; }
}
@media (max-width: 740px) {
  .letrunio-guides { margin-top: 52px; padding-top: 36px; }
  .letrunio-guide-grid { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; gap: 24px; }
  .letrunio-guide-image { height: 225px; }
  .letrunio-guide-copy { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .letrunio-guide-card { transition: none; }
  .letrunio-guide-card:hover { transform: none; }
}