/* Authoritative HELIONYX battery data blocks — light theme */
.battery-catalog-section {
  border-block: 1px solid var(--line);
}

.battery-catalog,
.battery-tech {
  display: grid;
  gap: 28px;
}

.battery-catalog__heading,
.battery-tech__heading {
  max-width: 850px;
}

.battery-catalog__heading > p,
.battery-tech__heading > p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.battery-catalog__model-note {
  padding: 12px 16px;
  border: 1px solid #dce6f6;
  border-radius: 14px;
  background: #f7faff;
}

.battery-catalog__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.battery-catalog__columns article,
.battery-tech__grid > div,
.battery-tech__details {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(20, 54, 105, .06);
}

.battery-catalog__columns article {
  padding: 22px;
}

.battery-catalog__columns h3,
.battery-tech__details h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 18px;
}

.battery-catalog__columns ul,
.battery-tech__details ul {
  margin: 0;
  padding-left: 20px;
}

.battery-catalog__columns li,
.battery-tech__details li {
  margin: 8px 0;
  color: #35445d;
  line-height: 1.55;
}

.battery-tech__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.battery-tech__grid > div {
  padding: 18px 20px;
}

.battery-tech__grid dt {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.battery-tech__grid dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.45;
}

.battery-tech__details {
  overflow: hidden;
}

.battery-tech__details summary {
  padding: 18px 22px;
  cursor: pointer;
  color: var(--ink);
  font-weight: 750;
  list-style-position: inside;
}

.battery-tech__details[open] summary {
  border-bottom: 1px solid var(--line);
  background: #f8faff;
}

.battery-tech__details-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  padding: 22px;
}

.battery-tech__document {
  padding: 20px 22px;
}

.battery-tech__document p {
  margin: 9px 0;
  color: #35445d;
  line-height: 1.6;
}

@media (max-width: 960px) {
  .battery-catalog__columns,
  .battery-tech__grid,
  .battery-tech__details-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .battery-catalog__columns,
  .battery-tech__grid,
  .battery-tech__details-grid {
    grid-template-columns: 1fr;
  }

  .battery-catalog__columns article,
  .battery-tech__grid > div {
    padding: 18px;
  }

  .battery-tech__details summary {
    padding: 16px 18px;
  }

  .battery-tech__details-grid,
  .battery-tech__document {
    padding: 18px;
  }
}