/**
 * FilterPanel — компактный редизайн панели фильтров задач.
 * Современные подходы: focus-visible, reduced-motion, micro-interactions, smooth accordion.
 *
 * Breakpoints:
 * - ≥1024px: 3 колонки primary, adaptive advanced grid
 * - 768–1023px: 2 колонки primary
 * - <768px: 1 колонка, stacked, advanced accordion
 */

/* ===== DESIGN TOKENS ===== */
.filter-panel {
    --fp-radius: 8px;
    --fp-radius-sm: 6px;
    --fp-gap: 8px;
    --fp-gap-sm: 6px;
    --fp-pad: 10px 12px;
    --fp-pad-sm: 8px 10px;
    --fp-input-h: 32px;
    --fp-input-radius: 6px;
    --fp-border: 1px solid #e5e7eb;
    --fp-bg: #fff;
    --fp-bg-subtle: #f9fafb;
    --fp-color-text: #111827;
    --fp-color-muted: #6b7280;
    --fp-primary: #6366f1;
    --fp-primary-hover: #4f46e5;
    --fp-primary-bg: #eef2ff;
    --fp-focus-ring: 0 0 0 2px var(--fp-bg), 0 0 0 4px var(--fp-primary);
    --fp-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --fp-transition-fast: 0.15s ease;
}

/* ===== CONTAINER ===== */
.filter-panel {
    background: var(--fp-bg);
    border: var(--fp-border);
    border-radius: var(--fp-radius);
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
}

/* ===== HEADER ===== */
.filter-panel__header {
    padding: var(--fp-pad-sm) var(--fp-pad);
    background: var(--fp-bg-subtle);
    border-bottom: var(--fp-border);
}

.filter-panel__header-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--fp-gap);
}

.filter-panel__title-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-panel__toggle {
    width: 28px;
    height: 28px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--fp-color-muted);
    border-radius: var(--fp-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--fp-transition), color var(--fp-transition);
}

.filter-panel__toggle:hover {
    background: #e5e7eb;
    color: var(--fp-color-text);
}

.filter-panel__toggle:focus-visible {
    outline: none;
    box-shadow: var(--fp-focus-ring);
}

.filter-panel__label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--fp-color-text);
}

.filter-panel__label i {
    color: var(--fp-primary);
}

.filter-panel__count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: #fff;
    background: var(--fp-primary);
    border-radius: 9px;
}

.filter-panel__count:empty,
.filter-panel__count[aria-hidden="true"] {
    display: none !important;
}

.filter-panel__chips-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.filter-panel__chips-label {
    font-size: 0.75rem;
    color: var(--fp-color-muted);
}

.filter-panel__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

/* Quick toggles (filter pills in header) */
.filter-panel__quick {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.filter-pill.filter-pill--icon {
    width: 28px;
    height: 28px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e5e7eb;
    background: var(--fp-bg);
    border-radius: var(--fp-radius-sm);
    color: var(--fp-color-muted);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all var(--fp-transition);
}

.filter-pill.filter-pill--icon:hover,
.filter-pill.filter-pill--icon[aria-pressed="true"],
.filter-pill.filter-pill--icon.active {
    border-color: var(--fp-primary);
    color: var(--fp-primary);
    background: var(--fp-primary-bg);
}

.filter-pill.filter-pill--icon:active {
    transform: scale(0.96);
}

.filter-pill.filter-pill--icon:focus-visible {
    outline: none;
    box-shadow: var(--fp-focus-ring);
}

/* Actions: Apply (primary), Reset (secondary), Save/Load (icon) */
.filter-panel__actions {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.filter-panel__btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--fp-radius-sm);
    cursor: pointer;
    transition: all var(--fp-transition), transform var(--fp-transition-fast);
}

.filter-panel__btn--apply {
    background: var(--fp-primary);
    border: 1px solid var(--fp-primary);
    color: #fff;
}

.filter-panel__btn--apply:hover {
    background: var(--fp-primary-hover);
    border-color: var(--fp-primary-hover);
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.25);
}

.filter-panel__btn--apply:active {
    transform: translateY(1px);
}

.filter-panel__btn--apply:focus-visible,
.filter-panel__btn--reset:focus-visible,
.filter-panel__btn--icon:focus-visible {
    outline: none;
    box-shadow: var(--fp-focus-ring);
}

.filter-panel__btn--reset {
    background: transparent;
    border: 1px solid #d1d5db;
    color: var(--fp-color-text);
}

.filter-panel__btn--reset:hover {
    border-color: #9ca3af;
    background: var(--fp-bg-subtle);
}

.filter-panel__btn--icon {
    padding: 6px 10px;
}

.filter-panel__btn-text {
    white-space: nowrap;
}

/* ===== COMPACT ROW (when panel collapsed) ===== */
.filter-panel__compact {
    padding: var(--fp-pad-sm) var(--fp-pad);
    border-top: var(--fp-border);
    background: var(--fp-bg);
}

.filter-panel__compact-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 12px;
}

.filter-panel__compact-row .filter-group {
    min-width: 120px;
}

.filter-panel__metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.6875rem;
    color: var(--fp-color-muted);
    margin-left: auto;
}

/* ===== PRIMARY FILTERS (expanded content) ===== */
.filter-panel__content {
    padding: var(--fp-pad);
    border-top: var(--fp-border);
    width: 100%;
    box-sizing: border-box;
}

.filter-panel__primary {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--fp-gap);
    align-items: start;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0 !important; /* переопределяет filters-ultra-modern min-width: 140px */
    width: 100%;
}

.filter-group__label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--fp-color-muted);
    text-transform: none;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 4px;
}

.filter-group__label i {
    width: 12px;
    text-align: center;
    color: #9ca3af;
}

/* Override filters-ultra-modern !important */
.filter-panel .filter-group__control,
.filter-panel .filter-group .filters-v2__input,
.filter-panel .filter-group select,
.filter-panel .filter-group input {
    height: var(--fp-input-h) !important;
    min-height: var(--fp-input-h) !important;
    padding: 5px 10px !important;
    font-size: 0.8125rem !important;
    border: 1px solid #e5e7eb;
    border-radius: var(--fp-input-radius);
    background: var(--fp-bg);
    color: var(--fp-color-text);
    width: 100%;
    box-sizing: border-box;
}

.filter-panel .filter-group select[multiple].filters-v2__input {
    height: auto !important;
    min-height: 52px !important;
    padding: 4px 8px !important;
}

/* Скрытый select логики — только для JS, не показывать в UI */
.filter-panel #plan-filter-logic {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    overflow: hidden !important;
    clip: rect(0,0,0,0) !important;
    border: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* Focus states для клавиатурной навигации (focus-visible — современный подход) */
.filter-panel .filter-group__control:focus,
.filter-panel .filter-group .filters-v2__input:focus {
    outline: none;
    border-color: var(--fp-primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.filter-panel .filter-group--search input {
    padding-left: 32px !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 10px center;
}

.filter-group--search {
    grid-column: 1 / -1;
}

.filter-period-group {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--fp-gap-sm);
}

.filter-period-type {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-period-range {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 6px;
}

.filter-period-range .filter-group__control {
    flex: 1;
    min-width: 90px; /* даты не сжимаются слишком сильно */
}

.filter-period-type-label {
    font-size: 0.625rem;
    color: var(--fp-color-muted);
    text-transform: none;
}

.filter-period-separator {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--fp-color-muted);
}

.filter-period-group .filter-group__control {
    min-width: 0;
}

.filter-inline-error {
    grid-column: 1 / -1;
    font-size: 0.75rem;
    color: #b91c1c;
    padding: 4px 0;
}

/* ===== ADVANCED FILTERS (collapsible) ===== */
.filter-panel__advanced-wrap {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed #e5e7eb;
}

/* Кнопка «Дополнительные фильтры» — явно интерактивна */
.filter-panel__advanced-toggle {
    padding: 8px 12px;
    background: var(--fp-bg-subtle);
    border: 1px solid #e5e7eb;
    border-radius: var(--fp-radius-sm);
    transition: background var(--fp-transition), border-color var(--fp-transition), box-shadow var(--fp-transition);
}
.filter-panel__advanced-toggle:hover {
    background: #eef2ff;
    border-color: var(--fp-primary);
}
.filter-panel__advanced-wrap.is-open .filter-panel__advanced-toggle {
    background: var(--fp-primary-bg);
    border-color: var(--fp-primary);
}

/* Плавное раскрытие accordion (max-height + opacity) */
.filter-panel__advanced {
    overflow: hidden;
    transition: opacity var(--fp-transition), padding var(--fp-transition-fast);
}

.filter-panel__advanced-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    border: none;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--fp-primary);
    cursor: pointer;
    text-align: left;
    transition: color var(--fp-transition);
}

.filter-panel__advanced-toggle:hover {
    color: var(--fp-primary-hover);
}

.filter-panel__advanced-toggle:focus-visible {
    outline: none;
    box-shadow: var(--fp-focus-ring);
    border-radius: var(--fp-radius-sm);
}

.filter-panel__advanced-chevron {
    font-size: 0.625rem;
    transition: transform var(--fp-transition);
}

.filter-panel__advanced-wrap.is-open .filter-panel__advanced-chevron {
    transform: rotate(180deg);
}

.filter-panel__advanced {
    padding-top: 12px;
}

.filter-panel__advanced[hidden] {
    display: none !important;
}

.filter-panel__advanced-wrap.is-open .filter-panel__advanced[hidden] {
    display: block !important;
}

.filter-panel__advanced-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--fp-gap);
}

/* Pill-style toggles for special conditions */
.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.filter-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--fp-color-muted);
    background: var(--fp-bg-subtle);
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    cursor: pointer;
    transition: all var(--fp-transition), transform var(--fp-transition-fast);
}

.filter-pill:hover {
    border-color: #d1d5db;
    background: #f3f4f6;
}

.filter-pill:active {
    transform: scale(0.98);
}

.filter-pill:focus-within {
    outline: none;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.filter-pill input {
    display: none;
}

.filter-pill:has(input:checked) {
    background: var(--fp-primary-bg);
    border-color: var(--fp-primary);
    color: var(--fp-primary);
    box-shadow: 0 1px 2px rgba(99, 102, 241, 0.15);
}

.filter-pill:has(input:checked):hover {
    background: #e0e7ff;
}

/* Compat: quick-filter-chip for JS sync */
.quick-filter-chip,
.filter-panel__quick .filter-pill--icon {
    /* Same as filter-pill--icon above */
}

/* ===== RESPONSIVE ===== */
/* ≥768px: 2 columns primary */
@media (min-width: 768px) {
    .filter-panel__primary {
        grid-template-columns: repeat(2, 1fr);
    }
    .filter-group--period {
        grid-column: span 2;
    }
    .filter-panel__advanced-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ≥1024px: 4 колонки, равномерное распределение по ширине */
@media (min-width: 1024px) {
    .filter-panel__primary {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .filter-group--search {
        grid-column: 1 / -1;
    }
    .filter-group--period {
        grid-column: span 1;
    }
    .filter-period-group {
        grid-template-columns: minmax(100px, 1fr) minmax(0, 2fr); /* тип даты | диапазон с более широкими полями */
    }
    .filter-panel__advanced-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .filter-group[data-group="conditions"] {
        grid-column: 1 / -1; /* вся ширина ряда — больше места для pills */
    }
}

/* Логика И/ИЛИ — переключатель */
.filter-logic-toggle {
    display: inline-flex;
    gap: 0;
    border-radius: var(--fp-input-radius);
    border: 1px solid #e5e7eb;
    overflow: hidden;
    background: var(--fp-bg-subtle);
}
.filter-logic-option {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--fp-color-muted);
    background: transparent;
    cursor: pointer;
    border-right: 1px solid #e5e7eb;
    transition: all var(--fp-transition);
}
.filter-logic-option:last-of-type {
    border-right: none;
}
.filter-logic-option:hover {
    color: var(--fp-color-text);
    background: #f3f4f6;
}
.filter-logic-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.filter-logic-option:has(input:checked) {
    background: var(--fp-primary-bg);
    color: var(--fp-primary);
}

/* Подсказка под полем (теги, исполнители) */
.filter-group__hint {
    font-size: 0.625rem;
    color: var(--fp-color-muted);
    margin-top: 2px;
}

/* Chevron для multiselect (визуальный индикатор выпадающего списка) */
.filter-panel .filter-group select[multiple] {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px !important;
}

/* <768px: 1 column, hide btn text on small screens */
@media (max-width: 767px) {
    .filter-panel__btn-text {
        display: none;
    }
    .filter-panel__btn--apply .filter-panel__btn-text,
    .filter-panel__btn--reset .filter-panel__btn-text {
        display: none;
    }
    .filter-panel__metrics {
        width: 100%;
        margin-left: 0;
    }
}

/* Collapsed: show compact row only (quick filters). Expanded: show content (primary + advanced), hide compact. */
.filter-panel.collapsed .filter-panel__content {
    display: none !important;
}

.filter-panel:not(.collapsed) .filter-panel__compact {
    display: none !important;
}

/* Filter chips (active filters tags) */
.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 0.75rem;
    color: var(--fp-color-muted);
    background: var(--fp-bg-subtle);
    border: 1px solid #e5e7eb;
    border-radius: var(--fp-radius-sm);
    white-space: nowrap;
}

.filter-chip:hover {
    background: #fef2f2;
    border-color: #fecaca;
    color: #b91c1c;
}

.filter-chip__remove {
    padding: 0;
    margin-left: 4px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: inherit;
    font-size: 0.875rem;
    border-radius: 4px;
    transition: background var(--fp-transition-fast);
}

.filter-chip__remove:hover {
    background: rgba(0, 0, 0, 0.06);
}

.filter-chip__remove:focus-visible {
    outline: none;
    box-shadow: var(--fp-focus-ring);
}

/* prefers-reduced-motion: уважаем настройки пользователя */
@media (prefers-reduced-motion: reduce) {
    .filter-panel *,
    .filter-panel *::before,
    .filter-panel *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}