body {
    background-color: #f4f6f9;
}

.badge-checked-in {
    background-color: #198754;
}

.badge-not-checked-in {
    background-color: #adb5bd;
}

/* Check-in scanner */
#scanner-flash {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #fff;
    text-align: center;
    font-size: 2rem;
}

#scanner-flash.flash-ok {
    display: flex;
    background-color: rgba(25, 135, 84, 0.96);
}

#scanner-flash.flash-already {
    display: flex;
    background-color: rgba(253, 126, 20, 0.96);
}

#scanner-flash.flash-error {
    display: flex;
    background-color: rgba(220, 53, 69, 0.96);
}

#scanner-flash i {
    font-size: 7rem;
    margin-bottom: 1rem;
}

#reader {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
}

#participant-list-panel {
    max-height: 80vh;
    overflow-y: auto;
}

.participant-row.just-updated {
    animation: highlight-row 1.5s ease-out;
}

@keyframes highlight-row {
    from { background-color: #d1e7dd; }
    to { background-color: transparent; }
}