:root {
  --nfc-teal: #24a687;
  --nfc-ink: #0f2c2a;
  --nfc-card-bg: rgba(255, 255, 255, 0.96);
  --nfc-shadow: 0 24px 60px rgba(15, 44, 42, 0.2);
}

.nfc-scan-button {
  position: fixed;
  right: clamp(16px, 4vw, 32px);
  bottom: clamp(18px, 4vw, 32px);
  padding: 12px 18px;
  border-radius: 999px;
  border: 2px solid var(--nfc-ink);
  background: var(--nfc-card-bg);
  color: var(--nfc-ink);
  font-weight: 800;
  box-shadow: 0 6px 0 rgba(15, 44, 42, 0.2);
  z-index: 1500;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.nfc-scan-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 rgba(15, 44, 42, 0.22);
}

.nfc-scan-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.nfc-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 2000;
}

.nfc-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.nfc-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 24, 23, 0.55);
}

.nfc-card {
  position: relative;
  margin-top: clamp(16px, 7vh, 48px);
  max-width: min(720px, 92vw);
  width: 100%;
  background: var(--nfc-card-bg);
  color: var(--nfc-ink);
  border-radius: 26px;
  border: 3px solid var(--nfc-ink);
  padding: clamp(18px, 4vw, 32px);
  box-shadow: var(--nfc-shadow);
  transform: translateY(-32px);
  transition: transform 0.35s ease;
}

.nfc-overlay.is-active .nfc-card {
  transform: translateY(0);
}

.nfc-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.nfc-card__title {
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  margin: 0;
}

.nfc-card__close {
  border: 2px solid var(--nfc-ink);
  background: transparent;
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 800;
  cursor: pointer;
}

.nfc-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(36, 166, 135, 0.15);
  font-weight: 700;
  margin: 12px 0 18px;
}

.nfc-grid {
  display: grid;
  gap: 16px;
}

.nfc-grid.two-column {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.nfc-section {
  background: rgba(15, 44, 42, 0.04);
  border-radius: 18px;
  padding: 14px 16px;
}

.nfc-section h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.nfc-label {
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}

.nfc-select,
.nfc-input {
  width: 100%;
  padding: 8px 10px;
  border-radius: 12px;
  border: 2px solid rgba(15, 44, 42, 0.2);
  font-family: inherit;
}

.nfc-history {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 8px;
}

.nfc-history li {
  background: #fff;
  border-radius: 12px;
  padding: 8px 10px;
  border: 1px solid rgba(15, 44, 42, 0.15);
  font-size: 0.92rem;
}

.nfc-log-btn {
  margin-top: 10px;
  border-radius: 12px;
  border: 2px solid var(--nfc-ink);
  background: var(--nfc-teal);
  color: #fff;
  font-weight: 800;
  padding: 8px 12px;
  cursor: pointer;
}

.nfc-encoding {
  font-size: 0.9rem;
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  border: 1px dashed rgba(15, 44, 42, 0.25);
}

.nfc-encoding code {
  display: block;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  white-space: pre-wrap;
  font-size: 0.82rem;
}

@media (max-width: 600px) {
  .nfc-card {
    margin-top: 0;
    border-radius: 20px 20px 0 0;
    min-height: 70vh;
  }
}