/**
 * Unified Filter System - Theme Component
 *
 * Centralized filter styling for consistent appearance across all blocks:
 * - timeline-posts
 * - timeline-overview
 * - stories-filter-v2
 *
 * Features:
 * - Instagram-style horizontal scrolling on mobile
 * - Consistent button design with proper borders and colors
 * - Professional dropdown interfaces on desktop
 * - Responsive behavior with smooth transitions
 */

/* === FILTER CONTAINER STRUCTURE === */
.tf-filter-controls {
    margin-bottom: var(--qm-space-lg, 1.5rem);
    background: var(--qm-bg-secondary, #f9f9f9);
    border-radius: var(--qm-border-radius, 8px);
    padding: var(--qm-space-md, 1rem);
    border: 1px solid var(--qm-border-color, #e5e7eb);
}

.tf-filter-controls.tf-has-search {
    padding-top: var(--qm-space-lg, 1.5rem);
}

/* === SEARCH BOX === */
.tf-search-container {
    margin-bottom: var(--qm-space-md, 1rem);
}

.tf-search-input {
    width: 100%;
    padding: var(--qm-space-sm, 0.75rem) var(--qm-space-md, 1rem);
    border: 1px solid var(--qm-border-color, #e5e7eb);
    border-radius: var(--qm-border-radius, 8px);
    font-size: var(--qm-text-base, 1rem);
    font-family: var(--qm-font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
    background: var(--qm-bg-primary, #ffffff);
    transition: var(--qm-transition, all 0.3s ease);
    outline: none;
}

.tf-search-input:focus {
    border-color: var(--qm-accent-color, #007cba);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.tf-search-input::placeholder {
    color: var(--qm-text-muted, #666);
    opacity: 0.7;
}

/* === FILTER BUTTON CONTAINERS === */
.tf-filter-row {
    display: flex;
    flex-direction: column;
    gap: var(--qm-space-sm, 0.75rem);
}

@media (min-width: 768px) {
    .tf-filter-row {
        flex-direction: row;
        align-items: center;
        gap: var(--qm-space-lg, 1.5rem);
    }
}

.tf-filter-section {
    flex: 1;
}

.tf-filter-label {
    font-size: var(--qm-text-sm, 0.875rem);
    font-weight: var(--qm-font-medium, 500);
    color: var(--qm-text-primary, #333);
    margin-bottom: var(--qm-space-xs, 0.5rem);
    display: block;
}

/* === UNIVERSAL INSTAGRAM SCROLLING === */
/* CRITICAL: Instagram-style mobile scrolling for ALL filter buttons */
.tf-filter-buttons,
.tf-phase-buttons,
.tf-character-buttons,
.tf-category-buttons {
    display: flex !important;
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    gap: var(--qm-filter-button-gap, 0.75rem) !important;
    padding: var(--qm-filter-button-mobile-padding, 0.5rem 1rem 0.75rem 1rem) !important;
    margin: 0 -1rem !important;
    scroll-behavior: smooth !important;
    scroll-padding-left: 1rem !important;
    scroll-padding-right: 1rem !important;

    /* Hide scrollbars for clean Instagram look */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* Internet Explorer 10+ */
}

.tf-filter-buttons::-webkit-scrollbar,
.tf-phase-buttons::-webkit-scrollbar,
.tf-character-buttons::-webkit-scrollbar,
.tf-category-buttons::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
}

/* === FILTER BUTTONS STYLING === */
.tf-filter-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--qm-filter-button-padding, 0.5rem 1rem);
    background: var(--qm-bg-primary, #ffffff);
    border: 1px solid var(--qm-border-color, #e5e7eb);
    border-radius: var(--qm-border-radius, 8px);
    font-size: var(--qm-text-sm, 0.875rem);
    font-weight: var(--qm-font-medium, 500);
    font-family: var(--qm-font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
    color: var(--qm-text-secondary, #6b7280);
    cursor: pointer;
    transition: var(--qm-transition, all 0.3s ease);
    text-decoration: none;
    white-space: nowrap;
    min-width: fit-content;
    flex-shrink: 0;

    /* Remove button-specific styling */
    outline: none;
    line-height: 1.2;
}

.tf-filter-btn:hover {
    border-color: var(--qm-accent-color, #007cba);
    background: rgba(0, 124, 186, 0.05);
    color: var(--qm-accent-color, #007cba);
    transform: translateY(-1px);
    box-shadow: var(--qm-shadow-sm, 0 1px 3px rgba(0,0,0,0.12));
}

.tf-filter-btn.active {
    background: var(--qm-accent-color, #007cba);
    border-color: var(--qm-accent-color, #007cba);
    color: white;
    font-weight: var(--qm-font-semibold, 600);
    box-shadow: var(--qm-shadow-md, 0 4px 6px rgba(0,0,0,0.12));
}

.tf-filter-btn:focus {
    outline: 2px solid var(--qm-accent-color, #007cba);
    outline-offset: 2px;
}

/* === DESKTOP DROPDOWN INTERFACES === */
.tf-filter-dropdown-container {
    position: relative;
    display: none; /* Hidden on mobile, shown on desktop */
}

@media (min-width: 768px) {
    .tf-filter-dropdown-container {
        display: block;
    }

    /* Hide Instagram buttons on desktop, show dropdowns */
    .tf-filter-buttons,
    .tf-phase-buttons,
    .tf-character-buttons,
    .tf-category-buttons {
        display: none !important;
    }
}

.tf-filter-dropdown {
    width: 100%;
    padding: var(--qm-space-sm, 0.75rem) var(--qm-space-md, 1rem);
    border: 1px solid var(--qm-border-color, #e5e7eb);
    border-radius: var(--qm-border-radius, 8px);
    background: var(--qm-bg-primary, #ffffff);
    font-size: var(--qm-text-sm, 0.875rem);
    font-family: var(--qm-font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
    color: var(--qm-text-primary, #333);
    cursor: pointer;
    transition: var(--qm-transition, all 0.3s ease);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.tf-filter-dropdown:hover {
    border-color: var(--qm-accent-color, #007cba);
    background-color: rgba(0, 124, 186, 0.02);
}

.tf-filter-dropdown:focus {
    border-color: var(--qm-accent-color, #007cba);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

/* === MOBILE-SPECIFIC OVERRIDES === */
@media (max-width: 767px) {
    .tf-filter-controls {
        padding: var(--qm-space-sm, 0.75rem);
        margin: 0 -0.5rem var(--qm-space-lg, 1.5rem) -0.5rem;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }

    .tf-filter-row {
        gap: var(--qm-space-md, 1rem);
    }

    .tf-filter-label {
        font-size: var(--qm-text-xs, 0.75rem);
        margin-bottom: var(--qm-space-xs, 0.25rem);
        text-transform: uppercase;
        letter-spacing: var(--qm-tracking-wide, 0.025em);
        opacity: 0.8;
    }

    /* Ensure proper scroll access on mobile */
    .tf-filter-buttons,
    .tf-phase-buttons,
    .tf-character-buttons,
    .tf-category-buttons {
        padding-left: var(--qm-space-md, 1rem) !important;
        padding-right: var(--qm-space-md, 1rem) !important;
        margin-left: calc(-1 * var(--qm-space-md, 1rem)) !important;
        margin-right: calc(-1 * var(--qm-space-md, 1rem)) !important;
    }
}

/* === RESULT COUNTERS === */
.tf-results-summary {
    margin-top: var(--qm-space-md, 1rem);
    padding: var(--qm-space-sm, 0.75rem) var(--qm-space-md, 1rem);
    background: var(--qm-bg-primary, #ffffff);
    border: 1px solid var(--qm-border-color, #e5e7eb);
    border-radius: var(--qm-border-radius, 8px);
    font-size: var(--qm-text-sm, 0.875rem);
    color: var(--qm-text-secondary, #6b7280);
    text-align: center;
}

.tf-results-count {
    font-weight: var(--qm-font-semibold, 600);
    color: var(--qm-accent-color, #007cba);
}

/* === MOBILE FEEDBACK SYSTEM === */
.qm-mobile-feedback {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--qm-accent-color, #007cba);
    color: white;
    padding: var(--qm-space-sm, 0.75rem) var(--qm-space-lg, 1.5rem);
    border-radius: var(--qm-border-radius-lg, 12px);
    font-size: var(--qm-text-sm, 0.875rem);
    font-weight: var(--qm-font-medium, 500);
    box-shadow: var(--qm-shadow-lg, 0 10px 15px rgba(0,0,0,0.12));
    opacity: 0;
    visibility: hidden;
    transition: var(--qm-transition, all 0.3s ease);
    z-index: var(--qm-z-toast, 60);
    pointer-events: none;
}

.qm-mobile-feedback.show {
    opacity: 1;
    visibility: visible;
}

@media (min-width: 768px) {
    .qm-mobile-feedback {
        display: none;
    }
}

/* === LOADING STATES === */
.tf-filter-controls.loading {
    opacity: 0.6;
    pointer-events: none;
}

.tf-filter-controls.loading .tf-filter-btn,
.tf-filter-controls.loading .tf-filter-dropdown {
    cursor: wait;
}

/* === EMPTY STATES === */
.tf-no-results {
    text-align: center;
    padding: var(--qm-space-2xl, 3rem) var(--qm-space-md, 1rem);
    color: var(--qm-text-muted, #666);
}

.tf-no-results h3 {
    font-size: var(--qm-text-lg, 1.125rem);
    font-weight: var(--qm-font-semibold, 600);
    margin-bottom: var(--qm-space-sm, 0.75rem);
    color: var(--qm-text-secondary, #6b7280);
}

.tf-no-results p {
    font-size: var(--qm-text-sm, 0.875rem);
    line-height: var(--qm-leading-relaxed, 1.6);
    opacity: 0.8;
}

/* === ACCESSIBILITY === */
.tf-filter-btn[aria-pressed="true"] {
    background: var(--qm-accent-color, #007cba);
    color: white;
}

.tf-filter-controls:focus-within {
    outline: 2px solid var(--qm-accent-color, #007cba);
    outline-offset: 2px;
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
    .tf-filter-btn,
    .tf-filter-dropdown,
    .tf-search-input,
    .qm-mobile-feedback {
        transition: none;
    }

    .tf-filter-btn:hover {
        transform: none;
    }
}

/* === HIGH CONTRAST MODE === */
@media (prefers-contrast: high) {
    .tf-filter-btn {
        border-width: 2px;
    }

    .tf-filter-btn.active {
        border-color: #000;
        background: #000;
    }

    .tf-search-input,
    .tf-filter-dropdown {
        border-width: 2px;
        border-color: #000;
    }
}