.donation-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  margin-top: var(--section-subtitle-margin-bottom, 1.75rem);
}

.donate-card {
  display: flex;
  flex-direction: column;
  background: var(--background-color-card);
  border-left: 5px solid var(--primary-color);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

.donate-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--card-shadow-hover);
}

.donate-card-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.donate-card-header .fab {
  font-size: 1.8rem;
}
.donate-card-header .fa-bitcoin { color: var(--btc-color); }
.donate-card-header .fa-ethereum { color: var(--eth-color); }
.donate-card-header .fa-dollar-sign { color: var(--usdt-color); }

.donate-currency-name {
  font-size: 1.5rem;
  color: var(--text-color-primary);
  font-weight: 600;
  margin: 0;
}
.donate-currency-name span {
  font-size: 1rem;
  color: var(--text-color-secondary);
  font-weight: 400;
}

.qr-code-wrapper {
  margin-bottom: 1.5rem;
}
.qr-code-image {
  width: 150px;
  height: 150px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color-soft);
  display: inline-block;
  padding: 4px;
  background-color: #fff;
}

.address-wrapper {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color-input);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: var(--background-color-input-group);
  margin-top: auto;
}

.address-text {
  flex-grow: 1;
  padding: 0.75rem 1rem;
  font-family: var(--font-family-monospace);
  font-size: 0.9rem;
  color: var(--text-color-secondary);
  background: transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: left;
}

.copy-address-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--primary-color);
  color: var(--text-color-light);
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-size: 1rem;
  min-width: 90px;
}
.copy-address-btn:hover {
  background: var(--primary-color-dark);
}
.copy-address-btn .copy-feedback {
  display: none;
  font-weight: 600;
  font-size: 0.9rem;
}
.copy-address-btn.copied {
  background-color: var(--usdt-color);
}
.copy-address-btn.copied .copy-icon {
  display: none;
}
.copy-address-btn.copied .copy-feedback {
  display: inline;
}

@media (max-width: 768px) {
  .donation-grid { gap: 1.5rem; }
  .donate-card { padding: 1.5rem; }
}