/* ===== Upgrade Modal ===== */
.upgrade-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.upgrade-overlay.open {
  pointer-events: auto;
  opacity: 1;
}

/* ---- Backdrop ---- */
.upgrade-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.upgrade-overlay.open .upgrade-backdrop {
  opacity: 1;
}

/* ---- Sheet (bottom drawer) ---- */
.upgrade-sheet {
  position: relative;
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  background: var(--bg-secondary);
  border-radius: 24px 24px 0 0;
  padding: 0;
  transform: translateY(100%);
  transition: transform 0.45s cubic-bezier(0.32, 0.72, 0, 1);
  z-index: 2;
  display: flex;
  flex-direction: column;
}
.upgrade-overlay.open .upgrade-sheet {
  transform: translateY(0);
}

/* ---- Scroll wrapper ---- */
.upgrade-scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.upgrade-scroll::-webkit-scrollbar { display: none; }

/* ---- Background Glow Layer ---- */
.upgrade-bg {
  position: absolute;
  inset: 0;
  border-radius: 24px 24px 0 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.upgrade-bg-shimmer {
  position: absolute;
  inset: -50%;
  background:
    radial-gradient(ellipse 40% 60% at 30% 20%, rgba(99,102,241,.25), transparent 60%),
    radial-gradient(ellipse 35% 50% at 70% 60%, rgba(139,92,246,.2), transparent 60%),
    radial-gradient(ellipse 45% 55% at 50% 80%, rgba(167,139,250,.18), transparent 60%),
    radial-gradient(ellipse 30% 40% at 20% 90%, rgba(99,102,241,.15), transparent 50%);
  background-size: 200% 200%;
  animation: shimmer 8s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { background-position: 0% 0%; }
  25% { background-position: 100% 0%; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0% 100%; }
}

/* ---- Floating Orbs ---- */
.upgrade-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .5;
  pointer-events: none;
}
.upgrade-orb-1 {
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(99,102,241,.6), transparent);
  top: -40px; left: -30px;
  animation: orbFloat1 6s ease-in-out infinite;
}
.upgrade-orb-2 {
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(139,92,246,.5), transparent);
  top: 40%; right: -40px;
  animation: orbFloat2 7s ease-in-out infinite;
}
.upgrade-orb-3 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(167,139,250,.4), transparent);
  bottom: 10%; left: 30%;
  animation: orbFloat3 8s ease-in-out infinite;
}
@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -25px) scale(1.1); }
  66% { transform: translate(-10px, 15px) scale(.9); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-25px, 20px) scale(.85); }
  66% { transform: translate(15px, -30px) scale(1.15); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -10px) scale(1.05); }
  66% { transform: translate(-20px, -20px) scale(.9); }
}

/* ---- Content ---- */
.upgrade-content {
  position: relative;
  z-index: 1;
  padding: 32px 28px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* ---- Close Button ---- */
.upgrade-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .3s ease;
  z-index: 3;
  line-height: 1;
}
.upgrade-close:hover {
  transform: rotate(90deg);
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-secondary);
  box-shadow: 0 0 16px rgba(129,140,248,.15);
}

/* ---- Header ---- */
.upgrade-header-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 16px;
  animation: iconPulse 3s ease-in-out infinite;
  box-shadow: 0 8px 32px rgba(99,102,241,.3);
}
@keyframes iconPulse {
  0%, 100% { box-shadow: 0 8px 32px rgba(99,102,241,.3); }
  50% { box-shadow: 0 8px 48px rgba(139,92,246,.45); }
}
.upgrade-header h2 {
  font-size: 22px; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -.01em;
  margin-bottom: 6px;
}
.upgrade-header p {
  font-size: 13px; color: var(--text-muted);
  margin-bottom: 0;
}

/* ---- Price ---- */
.upgrade-price-block {
  margin: 24px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.upgrade-price-currency {
  font-size: 18px; font-weight: 600;
  color: var(--text-secondary);
}
.upgrade-price-amount {
  font-size: 48px; font-weight: 800;
  letter-spacing: -.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.upgrade-price-period {
  font-size: 14px; color: var(--text-muted);
  font-weight: 500;
}

/* ---- Divider ---- */
.upgrade-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin-bottom: 24px;
}

/* ---- Features ---- */
.upgrade-features {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}
.upgrade-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.03);
  border: 1px solid transparent;
  transition: all .25s ease;
  text-align: left;
  opacity: 0;
  transform: translateY(20px);
}
.upgrade-overlay.open .upgrade-feature {
  animation: featureIn .5s ease forwards;
}
.upgrade-feature:hover {
  background: rgba(129,140,248,.06);
  border-color: rgba(129,140,248,.15);
}
.upgrade-feature:nth-child(1) { animation-delay: .15s; }
.upgrade-feature:nth-child(2) { animation-delay: .22s; }
.upgrade-feature:nth-child(3) { animation-delay: .29s; }
.upgrade-feature:nth-child(4) { animation-delay: .36s; }
.upgrade-feature:nth-child(5) { animation-delay: .43s; }
.upgrade-feature:nth-child(6) { animation-delay: .50s; }

@keyframes featureIn {
  to { opacity: 1; transform: translateY(0); }
}

.upgrade-feature-check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
}

.upgrade-feature-text {
  flex: 1;
}
.upgrade-feature-text strong {
  display: block;
  font-size: 14px; color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 1px;
}
.upgrade-feature-text span {
  font-size: 12px; color: var(--text-muted);
}

/* ---- CTA Button ---- */
.upgrade-cta {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: 14px;
  background: var(--gradient);
  background-size: 200% 200%;
  color: #fff;
  font-size: 16px; font-weight: 700;
  cursor: pointer;
  letter-spacing: .02em;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
  animation: ctaShine 3s ease-in-out infinite;
}
@keyframes ctaShine {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.upgrade-cta::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(255,255,255,.08) 45%,
    rgba(255,255,255,.15) 50%,
    rgba(255,255,255,.08) 55%,
    transparent 60%
  );
  animation: ctaGlare 2.5s ease-in-out infinite;
}
@keyframes ctaGlare {
  0% { transform: translateX(-100%) rotate(45deg); }
  100% { transform: translateX(100%) rotate(45deg); }
}
.upgrade-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,.4), 0 2px 8px rgba(139,92,246,.3);
}
.upgrade-cta:active {
  transform: translateY(0) scale(.98);
}
.upgrade-cta.subscribed {
  background: #16a34a;
  animation: none;
  pointer-events: none;
}
.upgrade-cta.subscribed::after { display: none; }

/* ---- Footer ---- */
.upgrade-footer {
  margin-top: 16px;
  font-size: 12px; color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.upgrade-footer-dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--border);
}

/* ---- Particles (subtle sparkles) ---- */
.upgrade-sparkle {
  position: absolute;
  width: 3px; height: 3px;
  background: #fff;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
}
@keyframes sparkleUp {
  0% { opacity: 0; transform: translateY(0) scale(0); }
  20% { opacity: .8; }
  80% { opacity: .3; }
  100% { opacity: 0; transform: translateY(-120px) scale(1.5); }
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .upgrade-sheet {
    max-width: 100%;
    border-radius: 20px 20px 0 0;
  }
  .upgrade-bg {
    border-radius: 20px 20px 0 0;
  }
  .upgrade-content {
    padding: 24px 20px 32px;
  }
  .upgrade-price-amount {
    font-size: 40px;
  }
}