/* ── Why Us section ──────────────────────────────────────── */
.why-us {
  padding-block: var(--section-padding-y);
  position: relative;
  overflow: hidden;
  background: var(--color-bg-secondary);
}

/* Tech grid background */
.why-us::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.why-us::after {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(0,87,217,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.why-us__inner {
  position: relative;
  z-index: 1;
}

.why-us__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

/* ── Stats grid ──────────────────────────────────────────── */
.why-us__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: border-color var(--transition-base), transform var(--transition-base),
              box-shadow var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 24px var(--color-accent-glow);
}

.stat-card__value {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--weight-extrabold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.stat-card__suffix {
  font-size: 0.6em;
  vertical-align: super;
}

.stat-card__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

/* ── Differentiator cards ────────────────────────────────── */
.why-us__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.diff-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--transition-base), transform var(--transition-base),
              box-shadow var(--transition-base);
}

.diff-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.diff-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,87,217,0.1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-accent);
  font-size: 28px;
  margin-bottom: var(--space-5);
  transition: box-shadow var(--transition-base);
}

.diff-card:hover .diff-card__icon {
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.diff-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.diff-card__description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

@media (max-width: 1024px) {
  .why-us__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .why-us__cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .why-us__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .why-us__cards {
    grid-template-columns: 1fr;
  }
}