.search-filters {
    position: relative;
}

.filters-section {
    background: var(--tests-surface);
    padding: 22px;
    border-radius: 28px;
    border: 1px solid var(--tests-border-soft);
    box-shadow: var(--tests-shadow-medium);
}

.compact-filters {
    position: sticky;
    top: 18px;
    z-index: 5;
    backdrop-filter: blur(12px);
}

.filter-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 18px;
}

.filter-header-row h3 {
    margin: 0;
}

.filter-primary-layout {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 16px;
}

.filter-search-card,
.filter-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px;
    border-radius: 22px;
    background: var(--tests-surface-soft);
    border: 1px solid var(--tests-border-soft);
}

.filter-card-compact {
    min-height: 138px;
}

.filter-panel-label,
.filter-group label {
    font-weight: 700;
    color: var(--tests-strong-text);
}

.filter-search-card {
    gap: 10px;
}

.filter-search-card input {
    font-size: 1rem;
}

.filter-quick-grid,
.filter-secondary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    align-items: stretch;
}

.filter-quick-grid > *,
.filter-secondary-grid > * {
    height: 100%;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-card-head {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
    margin-bottom: 14px;
}

.filter-card-head.compact {
    margin-bottom: 12px;
}

.filter-card-head h4 {
    margin: 0 0 4px;
    font-size: 1rem;
    color: var(--tests-strong-text);
}

.filter-card-head p {
    margin: 0;
    color: var(--tests-soft-text);
    font-size: 0.92rem;
    line-height: 1.45;
}

.filter-card-badge,
.topics-summary-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--tests-accent-surface);
    color: var(--tests-strong-text);
    font-size: 0.85rem;
    font-weight: 700;
    white-space: nowrap;
}

.filter-pill-group,
#status-selection,
#passed-selection,
#collections-selection,
#topics-selection,
#difficulty-selection {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.status-btn,
.passed-btn,
.collection-btn,
.topic-btn,
.difficulty-btn,
.favorite-filter-btn,
.solved-filter-btn,
.all-questions-btn,
.time-limit-btn,
.count-preset-btn,
.time-preset-btn {
    margin: 0;
    min-width: 96px;
    border-radius: 999px;
    padding: 10px 16px;
    font-size: 0.93rem;
    font-weight: 700;
    background: var(--tests-surface);
    color: var(--tests-strong-text);
    border: 1.5px solid var(--tests-border-soft);
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
}

.status-btn.active,
.passed-btn.active,
.collection-btn.active,
.difficulty-btn.active,
.topic-btn.active,
.favorite-filter-btn.active,
.solved-filter-btn.active,
.all-questions-btn.active,
.time-limit-btn.active,
.count-preset-btn.active,
.time-preset-btn.active {
    background: var(--primary-color);
    color: var(--btn-text-light);
    border-color: var(--primary-color);
    box-shadow: var(--btn-shadow);
}

.status-btn:hover:not(.active),
.passed-btn:hover:not(.active),
.collection-btn:hover:not(.active),
.difficulty-btn:hover:not(.active),
.topic-btn:hover:not(.active),
.favorite-filter-btn:hover:not(.active),
.solved-filter-btn:hover:not(.active),
.all-questions-btn:hover:not(.active),
.time-limit-btn:hover:not(.active),
.count-preset-btn:hover:not(.active),
.time-preset-btn:hover:not(.active) {
    background: rgba(var(--primary-color-rgb), 0.14);
    color: var(--tests-strong-text);
    border-color: rgba(var(--primary-color-rgb), 0.4);
}

.status-btn:focus-visible,
.passed-btn:focus-visible,
.collection-btn:focus-visible,
.difficulty-btn:focus-visible,
.topic-btn:focus-visible,
.favorite-filter-btn:focus-visible,
.solved-filter-btn:focus-visible,
.all-questions-btn:focus-visible,
.time-limit-btn:focus-visible,
.count-preset-btn:focus-visible,
.time-preset-btn:focus-visible {
    box-shadow: var(--btn-focus-ring);
}

.search-group input {
    width: 100%;
    min-height: 52px;
    padding: 13px 16px;
    border-radius: 16px;
    border: 1px solid var(--tests-border-soft);
    background: var(--card-bg);
    color: var(--text-color);
    box-shadow: inset 0 1px 2px rgba(var(--primary-color-rgb), 0.06);
}

.search-group input::placeholder {
    color: var(--tests-soft-text);
}

.search-group input:focus {
    outline: none;
    border-color: rgba(var(--accent-color-rgb), 0.45);
    box-shadow: var(--btn-focus-ring);
}

.topics-filter {
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
}

.topics-disclosure {
    height: 100%;
    background: var(--tests-surface-soft);
    border: 1px solid var(--tests-border-soft);
    color: var(--tests-strong-text);
    overflow: hidden;
    margin: 0;
}

.topics-disclosure summary {
    color: inherit;
}

.topics-filter-head {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
    cursor: pointer;
    list-style: none;
}

.topics-filter-head h4 {
    margin: 0 0 4px;
}

.topics-filter-head p {
    margin: 0;
    color: var(--tests-soft-text);
    font-size: 0.92rem;
    line-height: 1.45;
}

.topics-filter-head::-webkit-details-marker {
    display: none;
}

.topics-disclosure[open] {
    background: var(--tests-surface-muted);
}

.topics-disclosure[open] .topics-summary-badge {
    background: var(--primary-color);
    color: var(--btn-text-light);
}

.topics-disclosure[open] #topics-selection {
    padding-top: 4px;
}

.favorite-filter-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: auto;
}

.favorite-filter-btn {
    border-radius: 999px;
    padding: 10px 16px;
    font-weight: 700;
}

.btn-reset-filter {
    white-space: nowrap;
    border-color: var(--tests-border-soft);
    color: var(--tests-strong-text);
}

@media (max-width: 768px) {
    .compact-filters {
        position: static;
    }

    .filter-header-row,
    .topics-filter-head {
        flex-direction: column;
    }

    .filter-search-card,
    .filter-card {
        padding: 16px;
    }

    .filter-card-compact {
        min-height: auto;
    }
}