.filter-circle {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    border-radius: 999px;
    background: var(--surface-strong);
    color: var(--text);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    z-index: 21;
    transition: transform 0.28s ease, box-shadow 0.28s ease, background-color 0.28s ease;
}

.filter-circle:hover {
    transform: translateY(-3px);
    background: #fff;
    box-shadow: var(--shadow-card);
}

.filter-options {
    position: fixed;
    right: 20px;
    bottom: 92px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(18px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 21;
}

.filter-options.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.filter-options button {
    width: 50px;
    height: 50px;
    border-radius: 999px;
    background: var(--cta);
    color: #fff;
    box-shadow: 0 16px 28px rgba(35, 24, 31, 0.2);
    transition: transform 0.25s ease, background-color 0.25s ease;
}

.filter-options button:hover {
    transform: translateY(-2px);
    background: var(--cta-hover);
}

@media (max-width: 640px) {
    .filter-circle {
        width: 52px;
        height: 52px;
        right: 14px;
        bottom: 14px;
    }

    .filter-options {
        right: 14px;
        bottom: 78px;
    }

    .filter-options button {
        width: 46px;
        height: 46px;
    }
}