.checkin {
  max-width: 480px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* Header */
.checkin__header {
  margin-bottom: 1.5rem;
}

.checkin__title {
  font-size: 1.75rem;
  color: var(--espresso);
  margin: 0 0 0.75rem;
}

.checkin__date-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.checkin__date-label {
  font-size: 0.875rem;
  color: var(--muted);
  white-space: nowrap;
}

.checkin__date-input {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.35rem 0.6rem;
  font-size: 0.9rem;
  color: var(--espresso);
  background: var(--cream);
  font-family: inherit;
}

.checkin__date-input:focus {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}

/* Scanner viewport */
.checkin__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--espresso);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.checkin__viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Flash overlay */
.checkin__flash {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 8px;
}

@keyframes flash-success {
  0%   { box-shadow: inset 0 0 0 4px #22c55e; opacity: 1; }
  100% { box-shadow: inset 0 0 0 4px #22c55e; opacity: 0; }
}

@keyframes flash-duplicate {
  0%   { box-shadow: inset 0 0 0 4px var(--amber); opacity: 1; }
  100% { box-shadow: inset 0 0 0 4px var(--amber); opacity: 0; }
}

.checkin__flash--success {
  animation: flash-success 0.6s ease-out forwards;
}

.checkin__flash--duplicate {
  animation: flash-duplicate 0.6s ease-out forwards;
}

/* Controls */
.checkin__controls {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.checkin__btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: 4px;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s;
}

.checkin__btn:active {
  opacity: 0.8;
}

.checkin__btn--primary {
  background: var(--espresso);
  color: var(--cream);
}

.checkin__btn--ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--rule);
}

.checkin__btn--amber {
  background: var(--amber);
  color: #fff;
}

/* Toast */
.checkin__toast {
  min-height: 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--espresso);
  opacity: 0;
  transition: opacity 0.15s;
  padding: 0.1rem 0;
}

.checkin__toast--visible {
  opacity: 1;
}

.checkin__toast--success {
  color: #15803d;
}

.checkin__toast--duplicate {
  color: var(--amber);
}

.checkin__toast--error {
  color: #b91c1c;
}

/* Session list */
.checkin__session {
  margin-top: 2rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
}

.checkin__session-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--brown);
  margin: 0 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkin__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.35rem;
  border-radius: 999px;
  background: var(--espresso);
  color: var(--cream);
  font-size: 0.8rem;
  font-weight: 700;
}

.checkin__list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.checkin__list-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.6rem 0.85rem;
}

.checkin__list-name {
  font-weight: 500;
  color: var(--espresso);
}

.checkin__list-slug {
  font-size: 0.8rem;
  color: var(--muted);
  font-family: monospace;
}

.checkin__export-note {
  font-size: 0.85rem;
  color: #15803d;
  margin: 0.5rem 0 0;
}