.gravel-workbench { grid-template-columns: minmax(440px, 1fr) minmax(310px, .7fr); }
.gravel-layer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 17px;
}
.gravel-layer {
  border: 1px solid #d4dcdf;
  border-radius: 8px;
  padding: 15px;
  background: #f8faf9;
}
.gravel-base-layer-card { border-top: 4px solid #7b684c; }
.gravel-surface-layer-card { border-top: 4px solid #596267; }
.gravel-layer-head {
  display: flex;
  min-height: 44px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.gravel-layer-head h3 { margin: 3px 0 0; font-size: 16px; }
.gravel-layer-head > div > span {
  color: #6a757b;
  font-size: 11px;
  font-weight: 850;
  text-transform: uppercase;
}
.gravel-swatch {
  width: 42px;
  height: 27px;
  flex: 0 0 auto;
  border: 1px solid rgba(0, 0, 0, .12);
  border-radius: 4px;
}
.gravel-base-swatch { background: repeating-linear-gradient(135deg, #b49c74 0, #b49c74 6px, #8f7958 6px, #8f7958 10px); }
.gravel-layer-fields { display: grid; gap: 10px; margin-top: 12px; }
.gravel-layer-fields label {
  color: #2b353a;
  font-size: 13px;
  font-weight: 800;
}
.gravel-layer-fields label > span { color: #69767d; font-size: 11px; }
.gravel-layer-fields input {
  width: 100%;
  min-height: 42px;
  box-sizing: border-box;
  border: 1px solid #bdc8cd;
  border-radius: 6px;
  padding: 9px 11px;
  background: #fff;
  color: #1f2529;
  font: inherit;
}
.gravel-layer-fields input:focus { border-color: #16735f; outline: 3px solid rgba(22, 115, 95, .12); }
.gravel-toggle {
  display: inline-flex;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 6px;
  color: #334047;
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
}
.gravel-toggle input { width: 17px; height: 17px; accent-color: #16735f; }
.gravel-layer.is-disabled { opacity: .58; }
.gravel-common-fields { margin-top: 12px; }
.gravel-profile {
  overflow: hidden;
  border: 1px solid #c9d1d4;
  border-radius: 7px;
  background: #ddd;
}
.gravel-profile > div {
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 850;
  text-align: center;
}
.gravel-profile-surface {
  min-height: 48px;
  background: repeating-linear-gradient(120deg, #616a6e 0, #616a6e 4px, #4b5458 4px, #4b5458 9px);
}
.gravel-profile-base {
  min-height: 82px;
  background: repeating-linear-gradient(135deg, #a38b64 0, #a38b64 7px, #806c4f 7px, #806c4f 12px);
}
.gravel-profile-subgrade { min-height: 42px; background: #6e5a42; }
.gravel-profile-panel .concrete-section-summary { margin-top: 17px; }
@media (max-width: 1020px) {
  .gravel-workbench { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .gravel-layer-grid { grid-template-columns: 1fr; }
}