.plans__card[data-tier="pioneer"]   { background: linear-gradient(160deg, rgba(140, 110, 80, 0.5) 0%, rgba(140, 110, 80, 0.12) 50%, rgba(10, 8, 18, 0.92) 100%); --tier-color: #8c6e50; box-shadow: inset 0 0 0 1px rgba(140, 110, 80, 0.25); }
.plans__card[data-tier="engineer"]   { background: linear-gradient(160deg, rgba(130, 140, 150, 0.5) 0%, rgba(130, 140, 150, 0.12) 50%, rgba(10, 8, 18, 0.92) 100%); --tier-color: #828c96; box-shadow: inset 0 0 0 1px rgba(130, 140, 150, 0.25); }
.plans__card[data-tier="architect"]   { background: linear-gradient(160deg, rgba(70, 130, 200, 0.5) 0%, rgba(70, 130, 200, 0.12) 50%, rgba(10, 8, 18, 0.92) 100%); --tier-color: #4682c8; box-shadow: inset 0 0 0 1px rgba(70, 130, 200, 0.25); }
.plans__card[data-tier="industrialist"]   { background: linear-gradient(160deg, rgba(210, 150, 50, 0.5) 0%, rgba(210, 150, 50, 0.12) 50%, rgba(10, 8, 18, 0.92) 100%); --tier-color: #d29632; box-shadow: inset 0 0 0 1px rgba(210, 150, 50, 0.25); }
.plans__card[data-tier="megafactory"]   { background: linear-gradient(160deg, rgba(220, 180, 60, 0.5) 0%, rgba(220, 180, 60, 0.12) 50%, rgba(10, 8, 18, 0.92) 100%); --tier-color: #dcb43c; box-shadow: inset 0 0 0 1px rgba(220, 180, 60, 0.25); }

.plans__card[data-tier="pioneer"] .plans__card-btn,
.plans__card[data-tier="engineer"] .plans__card-btn,
.plans__card[data-tier="architect"] .plans__card-btn,
.plans__card[data-tier="industrialist"] .plans__card-btn,
.plans__card[data-tier="megafactory"] .plans__card-btn { color: #0d0b14; }

.plans__card.plans__card--popular[data-tier="architect"] {
  overflow: visible;
  box-shadow: 0 0 0 2px var(--tier-color), 0 0 40px rgba(70, 130, 200, 0.25), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.plans__card.plans__card--popular[data-tier="architect"]:hover {
  box-shadow: 0 0 0 3px var(--tier-color), 0 0 56px rgba(70, 130, 200, 0.35), 0 20px 56px rgba(0, 0, 0, 0.5);
}

.plans__card.plans__card--popular[data-tier="architect"] .plans__card-overlay {
  border-radius: 18px;
}