.fz-arr-wrapper {
    max-width: 520px;
    margin: 0 auto;
}
.fz-arr-diff-group {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.fz-arr-diff-btn {
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 0.9rem;
    border: 1.5px solid var(--bs-border-color, #dee2e6);
    background: var(--bs-body-bg, #fff);
    color: var(--bs-body-color, #212529);
    transition: all 0.15s ease;
    cursor: pointer;
}
.fz-arr-diff-btn:hover {
    border-color: var(--bs-primary, #0d6efd);
    color: var(--bs-primary, #0d6efd);
}
.fz-arr-diff-btn.active {
    background: var(--bs-primary, #0d6efd);
    border-color: var(--bs-primary, #0d6efd);
    color: #fff;
    box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
}
.fz-arr-hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bs-tertiary-bg, #f8f9fa);
    border: 1px solid var(--bs-border-color, #dee2e6);
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    margin-bottom: 0.75rem;
}
.fz-arr-tools {
    display: flex;
    justify-content: center;
    gap: 8px;
}
.fz-arr-tool-btn {
    flex: 1;
    max-width: 140px;
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 0.5rem;
    border: 1px solid var(--bs-border-color, #dee2e6);
    background: var(--bs-body-bg, #fff);
    color: var(--bs-body-color, #212529);
    cursor: pointer;
    transition: all 0.15s;
}
.fz-arr-tool-btn:hover:not(:disabled) {
    background: var(--bs-tertiary-bg, #f8f9fa);
    border-color: var(--bs-primary, #0d6efd);
}
.fz-arr-tool-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.fz-arr-maze-box {
    position: relative;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}
.fz-arr-svg-container {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 1 / 1;
}
.fz-arr-svg-container svg {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 0.5rem;
    border: 2px solid var(--bs-border-color, #dee2e6);
    background: #0f172a;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Animations */
.fz-arr-shake {
    animation: fz-arr-shake-anim 0.35s ease-in-out;
}
@keyframes fz-arr-shake-anim {
    0%, 100% { transform: translate(0, 0); }
    20% { transform: translate(-3px, 2px); }
    40% { transform: translate(3px, -2px); }
    60% { transform: translate(-2px, -2px); }
    80% { transform: translate(2px, 2px); }
}
.fz-arr-blocker-glow {
    filter: drop-shadow(0 0 10px #f43f5e) brightness(1.3);
    transition: filter 0.4s ease;
}
.fz-arr-hint {
    animation: fz-arr-hint-pulse 1s infinite alternate ease-in-out;
}
@keyframes fz-arr-hint-pulse {
    0% { filter: drop-shadow(0 0 4px #eab308) brightness(1); }
    100% { filter: drop-shadow(0 0 16px #facc15) brightness(1.5); }
}
.fz-arr-slithering {
    transition: transform 0.32s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.32s ease-in;
    pointer-events: none;
}
.fz-arr-slither-up {
    transform: translateY(-120%);
    opacity: 0;
}
.fz-arr-slither-down {
    transform: translateY(120%);
    opacity: 0;
}
.fz-arr-slither-left {
    transform: translateX(-120%);
    opacity: 0;
}
.fz-arr-slither-right {
    transform: translateX(120%);
    opacity: 0;
}