/* ===== D4: ПОЧЕМУ МЫ — Social Proof ===== */
.why-us {
  padding: 80px 0;
  background: white;
  position: relative;
}
.why-us::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 4px;
  background: var(--brand-teal);
  border-radius: 2px;
}
.why-us h2 {
  text-align: center;
  font-family: 'LatoWebHeavy', 'Lato', Arial, sans-serif;
  font-size: 30px;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.why-us__subtitle {
  text-align: center;
  color: var(--brand-gray);
  font-size: 16px;
  margin-bottom: 50px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.why-us__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.why-us__item {
  text-align: center;
  padding: 36px 24px 32px;
  background: var(--brand-light-gray);
  border-radius: 16px;
  border: 1px solid #eef2f3;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  position: relative;
}
.why-us__item:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px color-mix(in srgb, var(--brand-teal), transparent 85%);
  border-color: var(--brand-teal);
}
.why-us__icon {
  width: 80px; height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--brand-teal) 0%, color-mix(in srgb, var(--brand-teal), black 14%) 100%);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--brand-teal), transparent 70%);
  transition: transform 0.3s;
}
.why-us__item:hover .why-us__icon {
  transform: scale(1.08) rotate(-3deg);
}
.why-us__icon svg { width: 36px; height: 36px; stroke: white; fill: none; stroke-width: 1.8; }
.why-us__title {
  font-family: 'LatoWebHeavy', 'Lato', Arial, sans-serif;
  font-size: 17px;
  font-weight: 900;
  margin-bottom: 10px;
  color: var(--brand-dark);
  letter-spacing: 0.2px;
}
.why-us__desc {
  font-size: 14px;
  font-weight: 500;
  color: #6B7B82;
  line-height: 1.6;
}
.why-us__number {
  display: block;
  font-family: 'LatoWebHeavy', 'Lato', Arial, sans-serif;
  font-size: 32px;
  font-weight: 900;
  color: var(--brand-teal);
  margin-bottom: 4px;
  line-height: 1;
}