.secure-pin-pad {
    max-width: 320px;
}

.secure-pin-display {
    border: 1px solid var(--bs-border-color);
    border-radius: .5rem;
    padding: .625rem .75rem;
    min-height: 42px;
    font-size: 1.05rem;
    letter-spacing: .2rem;
    user-select: none;
    margin-bottom: .75rem;
}

.secure-pin-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .5rem;
}

.secure-pin-btn {
    font-weight: 700;
    padding: .75rem 0;
    border-radius: .5rem;
    border: 1px solid var(--bs-border-color);
    background: var(--bs-body-bg);
}

.secure-pin-btn:hover {
    background: var(--bs-secondary-bg);
}

.secure-pin-shake {
    animation: secure-pin-shake .35s linear 1;
}

@keyframes secure-pin-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}