/* Subscription and plan-selection interface. */
.upgrade-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal, 10000);
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.upgrade-overlay {
  position: absolute;
  inset: 0;
  background: rgba(3, 6, 10, 0.82);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.upgrade-content {
  position: relative;
  width: min(820px, 100%);
  max-height: min(760px, calc(100dvh - 2.5rem));
  overflow-y: auto;
  padding: 2rem;
  border: 1px solid rgba(209, 191, 150, 0.2);
  border-radius: 20px;
  background: var(--color-bg-secondary);
  box-shadow: var(--shadow-xl);
}

.upgrade-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-primary);
  font: inherit;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.upgrade-close:hover { background: rgba(255, 255, 255, 0.08); }

.upgrade-header {
  max-width: 36rem;
  margin: 0 auto 2rem;
  padding-inline: 2rem;
  text-align: center;
}

.upgrade-header h2 {
  margin: 0 0 0.5rem;
  color: var(--color-text-primary);
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: -0.025em;
}

.upgrade-header p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.tier-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.tier-card-premium {
  position: relative;
  display: flex;
  min-height: 270px;
  flex-direction: column;
  padding: 1.5rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 16px;
  background: var(--color-surface);
}

.tier-card-premium::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(209, 191, 150, 0.38), transparent);
}

.tier-featured {
  border-color: rgba(209, 191, 150, 0.45);
  background: linear-gradient(180deg, rgba(209, 191, 150, 0.09), transparent 55%), var(--color-surface);
}

.tier-card-header { margin-bottom: 1rem; }
.tier-name {
  margin: 0;
  color: var(--color-text-primary);
  font-size: 1.25rem;
  letter-spacing: -0.015em;
}

.tier-price-section {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tier-price-free { display: flex; align-items: baseline; }
.price-main {
  color: var(--color-text-primary);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
}

.tier-card-premium > p {
  margin: 0 0 1.5rem;
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.tier-card-footer { margin-top: auto; }
.tier-btn {
  width: 100%;
  min-height: 44px;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-primary);
  font: inherit;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
}

.tier-btn:hover { background: rgba(255, 255, 255, 0.09); }
.tier-btn:disabled { cursor: wait; opacity: 0.68; }
.tier-btn-upgrade {
  border-color: rgba(209, 191, 150, 0.42);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
}
.tier-btn-upgrade:hover { background: #e0cc9e; }

.upgrade-footer {
  margin: 0.75rem 0 0;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  text-align: center;
}

.upgrade-footer a { color: var(--color-text-secondary); }

@media (max-width: 680px) {
  .upgrade-modal { padding: 0; align-items: end; }
  .upgrade-content {
    width: 100%;
    max-height: calc(100dvh - env(safe-area-inset-top, 0px));
    padding: 1.5rem;
    padding-bottom: max(1.5rem, env(safe-area-inset-bottom, 0px));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 20px 20px 0 0;
  }
  .upgrade-header { padding-inline: 1.5rem; }
  .tier-comparison { grid-template-columns: 1fr; }
  .tier-card-premium { min-height: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .upgrade-overlay { -webkit-backdrop-filter: none; backdrop-filter: none; }
}