.session-map {
  background: #e9efeb;
}

.session-grid,
.relay-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.session-grid article,
.relay-grid article {
  min-width: 0;
  padding: 18px;
  border-top: 4px solid var(--green);
  background: #fff;
}

.session-grid h3,
.relay-grid h3 {
  margin: 8px 0;
}

.session-grid p,
.relay-grid p {
  margin-bottom: 0;
}

.session-rule {
  margin-top: 18px;
  padding: 16px;
  border-left: 5px solid var(--yellow);
  background: #fff;
}

.envelope-demo {
  display: grid;
  grid-template-columns: minmax(320px, .9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: center;
  margin-bottom: 28px;
}

.envelope-sketch {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  border: 2px solid var(--ink);
  background-color: #fff;
  background-image:
    linear-gradient(#dfe5e1 1px, transparent 1px),
    linear-gradient(90deg, #dfe5e1 1px, transparent 1px);
  background-size: 26px 26px;
}

.envelope-sketch span {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: .78rem;
  font-weight: 800;
}

.envelope-sketch .handle-sweep {
  inset: 24px 13%;
  border: 3px dashed var(--red);
  background: rgba(248,236,234,.7);
  color: #7a2c26;
}

.envelope-sketch .bike-size {
  z-index: 2;
  inset: 65px 24%;
  border: 5px solid var(--blue);
  background: rgba(237,243,247,.92);
  color: #244c69;
}

.envelope-sketch .base {
  z-index: 3;
  inset: 112px 35%;
  border: 7px solid var(--green);
  background: #fff;
  color: var(--green-dark);
}

.envelope-sketch .access {
  right: 2%;
  bottom: 14px;
  left: 2%;
  height: 38px;
  border-top: 5px solid var(--yellow);
  color: #6c4e10;
}

.household-relay {
  background: #fff;
}

.product-details {
  background: #f4f6f5;
}

.product-details-wrap table {
  min-width: 1120px;
  table-layout: fixed;
}

.product-details-wrap th:first-child {
  width: 170px;
}

.product-details-wrap th,
.product-details-wrap td {
  vertical-align: top;
}

.product-details-wrap td {
  font-size: .9rem;
  line-height: 1.48;
}

.relay-grid article {
  border-color: var(--red);
}

.relay-grid article > span {
  color: var(--red);
  font: 700 2rem/1 Georgia, serif;
}

@media (max-width: 900px) {
  .session-grid,
  .relay-grid {
    grid-template-columns: 1fr 1fr;
  }

  .envelope-demo {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .session-grid,
  .relay-grid {
    grid-template-columns: 1fr;
  }

  .envelope-sketch {
    min-height: 320px;
  }

  .product-details-wrap table {
    min-width: 980px;
  }
}