.model-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 110px 24px;
}

.model-intro,
.benefits-heading {
  display: grid;
  grid-template-columns: 220px 1fr;
  align-items: start;
}

.model-intro {
  margin-bottom: 46px;
}

.model-intro .eyebrow,
.benefits-heading .eyebrow {
  padding-top: 13px;
}

.model-lead {
  max-width: 780px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 21px;
}

.definitions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.definition {
  padding: 30px 28px;
  border-right: 1px solid var(--line);
}

.definition:last-child {
  border-right: 0;
}

.definition dt {
  color: var(--blue);
  font-size: 22px;
  font-weight: 700;
}

.definition dd {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.test-purpose {
  margin: 0 0 60px;
  padding: 17px 24px;
  color: #fff;
  background: var(--navy);
  border-left: 7px solid var(--gold);
  font-size: 20px;
}

.model-figure {
  margin-bottom: 44px;
}

.model-caption {
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .015em;
}

.model-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) 158px;
  gap: 14px;
  align-items: start;
}

.model-flow::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 40px;
  left: -12px;
  right: 74px;
  height: 8px;
  background: var(--green);
}

.driver-block,
.model-result {
  position: relative;
  z-index: 1;
}

.driver-block h3 {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 88px;
  margin: 0;
  padding: 12px 8px;
  color: #fff;
  background: var(--navy);
  font-size: 18px;
  text-align: center;
}

.driver-block ul {
  margin: 15px 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink);
  font-size: 14px;
}

.driver-block li {
  margin: 5px 0;
}

.model-result {
  display: flex;
  width: 154px;
  height: 154px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: -33px;
  padding: 18px;
  color: var(--navy);
  background: #fff;
  border: 3px solid #43536c;
  border-radius: 50%;
  text-align: center;
}

.model-result strong {
  font-size: 17px;
}

.model-result span {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.35;
}

.concept-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0 0 100px;
}

.concept-contrast article {
  padding: 30px 34px;
}

.concept-contrast article:first-child {
  color: #fff;
  background: var(--blue);
}

.concept-contrast article:last-child {
  color: var(--navy);
  background: #edf4e9;
  border-right: 1px solid #ccddc5;
}

.concept-contrast span {
  display: block;
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.concept-contrast article:last-child span {
  color: var(--green);
}

.concept-contrast strong {
  display: block;
  font-size: 23px;
}

.concept-contrast p {
  margin: 8px 0 0;
  opacity: .88;
  font-size: 16px;
}

.benefits-heading {
  margin-bottom: 55px;
}

@media (max-width: 900px) {
  .model-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .model-flow::before {
    display: none;
  }

  .model-result {
    grid-column: 1 / -1;
    width: auto;
    height: auto;
    min-height: 110px;
    margin-top: 10px;
    border-radius: 4px;
  }
}

@media (max-width: 850px) {
  .model-intro,
  .benefits-heading,
  .definitions,
  .concept-contrast {
    grid-template-columns: 1fr;
  }

  .model-intro .eyebrow,
  .benefits-heading .eyebrow {
    padding-top: 0;
  }

  .definition {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .definition:last-child {
    border-bottom: 0;
  }

  .concept-contrast {
    margin-bottom: 76px;
  }
}

@media (max-width: 560px) {
  .model-section {
    padding: 75px 18px;
  }

  .model-flow {
    grid-template-columns: 1fr;
  }

  .model-result {
    grid-column: auto;
  }

  .test-purpose {
    margin-bottom: 48px;
    font-size: 18px;
  }

  .concept-contrast article {
    padding: 25px 22px;
  }
}