/* USP — 4 karty w stylu projektu (stat, icon+CTA, featured) */

.usp__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
  list-style: none;
  padding: 0;
}

@media (max-width: 1023px) { .usp__list { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .usp__list { grid-template-columns: 1fr; } }

.usp__item {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  gap: var(--space-sm);
  position: relative;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
  min-height: 420px;
}
.usp__item::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.usp__item:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
}
.usp__item:hover::before { transform: scaleX(1); }

/* Icon (standard cards) */
.usp__icon {
  align-self: flex-start;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-lg);
}
.usp__icon svg,
.usp__icon img {
  max-width: 22px;
  max-height: 22px;
}

/* Label / title */
.usp__label {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-dark);
  line-height: 1.1;
  margin: 0 0 var(--space-sm);
}

/* Description */
.usp__desc {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

/* CTA link */
.usp__cta {
  margin-top: var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  transition: gap var(--transition-fast), color var(--transition-fast);
}
.usp__cta:hover {
  color: var(--color-primary-dark);
  gap: 12px;
}

/* STAT card (big number) */
.usp__item--stat {
  align-items: flex-start;
}
.usp__stat-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-lg);
}
.usp__stat-icon svg { max-width: 22px; max-height: 22px; }

.usp__stat-number {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-6xl), 8vw, 96px);
  font-weight: 700;
  line-height: 0.85;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin: 0;
}

.usp__stat-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-dark);
  margin-top: var(--space-sm);
  margin-bottom: var(--space-md);
}

/* FEATURED card (granat + żółte akcenty) */
.usp__item--featured {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  position: relative;
  overflow: hidden;
}
.usp__item--featured::after {
  content: '%';
  position: absolute;
  bottom: -30px;
  right: -15px;
  font-family: var(--font-heading);
  font-size: 200px;
  font-weight: 700;
  color: rgba(253, 224, 71, 0.18);
  line-height: 1;
  pointer-events: none;
}
.usp__item--featured .usp__icon {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}
.usp__item--featured .usp__label,
.usp__item--featured .usp__stat-label {
  color: #fff;
}
.usp__item--featured .usp__desc {
  color: rgba(255, 255, 255, 0.85);
}
.usp__item--featured .usp__cta {
  color: var(--color-accent);
}
.usp__item--featured .usp__cta:hover {
  color: #fff;
}
.usp__item--featured .usp__stat-number {
  color: var(--color-accent);
}
.usp__item--featured:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-accent);
}

.usp__empty {
  text-align: center;
  color: var(--color-text-light);
  font-size: var(--text-sm);
  padding: var(--space-lg);
}

@media (max-width: 640px) {
  .usp__item { padding: var(--space-sm); min-height: auto; }
  .usp__icon, .usp__stat-icon { width: 40px; height: 40px; }
}