body {
  font-family: 'Be Vietnam Pro', sans-serif;
  background: #111;
  color: #fff;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Top navigation styles */
.menu {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 1200;
  display: flex;
  gap: 12px;
  background: rgba(255,255,255,0.06);
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.6);
}
.menu a {
  color: #fff;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.18s ease, background 0.18s ease;
}
.menu a:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,0.08);
}
.menu a:focus {
  outline: 2px solid rgba(255,255,255,0.12);
  outline-offset: 2px;
}

/* Small layout tune: place donate-section centered but allow some top space for menu/back button */
.donate-section { margin-top: 36px; }

.donate-section {
  background: rgba(255, 255, 255, 0.05);
  padding: 40px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  text-align: center;
}

.qr-container h2 {
  margin-bottom: 20px;
}

.qr-image {
  width: 240px;
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(255,255,255,0.2);
}

.qr-button {
  background: transparent;
  border: none;
  padding: 0;
  cursor: zoom-in;
  display: inline-block;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border-radius: 12px;
}
.qr-button:focus {
  outline: 2px solid rgba(255,255,255,0.12);
  transform: translateY(-4px) scale(1.02);
}
.qr-button:hover .qr-image {
  transform: translateY(-6px) rotate(-1deg);
  box-shadow: 0 12px 32px rgba(0,0,0,0.6), 0 0 40px rgba(255,255,255,0.06) inset;
}
.qr-image {
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

/* subtle floating animation */
.qr-container {
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
  100% { transform: translateY(0); }
}

.note {
  margin-top: 20px;
  font-size: 1rem;
  color: #aaa;
}
.back-button {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 1200;
  display: inline-block;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  transition: background 0.22s ease, transform 0.18s ease;
  font-weight: 700;
  box-shadow: 0 8px 28px rgba(0,0,0,0.6);
}

.back-button:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

/* Modal / Lightbox styles */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  opacity: 0;
  transition: opacity 200ms ease;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal[aria-hidden="false"] {
  display: flex;
  opacity: 1;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px) saturate(120%);
  transition: opacity 240ms ease;
}
.modal-content {
  position: relative;
  z-index: 1001;
  max-width: 92vw;
  max-height: 92vh;
  padding: 18px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02));
  box-shadow: 0 12px 48px rgba(0,0,0,0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.qr-zoom {
  width: min(560px, 86vw);
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
  transition: transform 200ms ease;
}
.modal-caption {
  margin-top: 12px;
  color: #cfcfcf;
  font-size: 0.95rem;
  opacity: 0.9;
}
.modal-close {
  position: absolute;
  top: 8px;
  right: 10px;
  background: transparent;
  color: #fff;
  border: none;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  padding: 6px 10px;
}
.modal-close:hover { transform: scale(1.06); }

/* small responsiveness */
@media (max-width: 480px) {
  .qr-image { width: 200px; }
  .qr-zoom { width: min(320px, 86vw); }
}

/* Additional responsive tweaks */
@media (max-width: 680px) {
  .menu { top: 12px; left: 12px; padding: 6px 8px; gap: 8px; }
  .menu a { font-size: 0.88rem; padding: 5px 8px; }
  .back-button { top: 12px; right: 12px; padding: 8px 12px; font-size: 0.95rem; }
  .donate-section { margin-top: 56px; padding: 28px; }
}

/* Donate card improvements */
.donate-section {
  max-width: 520px;
  width: calc(100% - 48px);
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
}