{{ define "main" }}
<h1>{{ .Title }}</h1>
{{ if .Description }}
<p class="lead">{{ .Description }}</p>
{{ end }}

{{ .Content }}

{{ if .Pages }}
<div class="filter-controls">
    <div class="filter-row">
        <input type="text" id="searchInput" placeholder="Search titles and descriptions..." class="search-input">
        <select id="tagFilter" class="tag-filter">
            <option value="">All tags</option>
        </select>
        <select id="sortBy" class="sort-select">
            <option value="title">Sort by Title</option>
            <option value="date">Sort by Date</option>
        </select>
    </div>
</div>
<div class="grid" id="cardGrid">
    {{ range .Pages }}
    <div class="card" 
         data-title="{{ .Title }}"
         data-description="{{ if .Description }}{{ .Description }}{{ else if .Summary }}{{ .Summary | plainify | replaceRE "^### \\*\\*Summary\\*\\*\\s*" "" | truncate 200 }}{{ else }}{{ .Content | plainify | replaceRE "^### \\*\\*Summary\\*\\*\\s*" "" | truncate 200 }}{{ end }}"
         data-tags="{{ if .Params.tags }}{{ delimit .Params.tags "," }}{{ end }}"
         data-date="{{ .Date.Format "2006-01-02" }}">
        {{ if .Params.image }}
        <img src="{{ .Params.image }}" alt="{{ .Title }} logo" class="case-logo" />
        {{ end }}
        <h3><a href="{{ .RelPermalink }}" class="card-title-link">{{ .Title }}</a></h3>
        {{ if .Description }}
        <p>{{ .Description }}</p>
        {{ else if .Summary }}
        <p>{{ .Summary | plainify | replaceRE "^### \\*\\*Summary\\*\\*\\s*" "" | truncate 200 }}</p>
        {{ else }}
        <p>{{ .Content | plainify | replaceRE "^### \\*\\*Summary\\*\\*\\s*" "" | truncate 200 }}</p>
        {{ end }}
        {{ if .Params.tags }}
        <div class="tags">
            {{ range .Params.tags }}
            <a href="?tag={{ . | urlize }}" class="tag">{{ . }}</a>
            {{ end }}
        </div>
        {{ end }}
    </div>
    {{ end }}
</div>
{{ end }}

<style>
.lead {
    font-size: 1.125rem;
    color: #666;
    margin-bottom: 2rem;
}

.filter-controls {
    margin-bottom: 48px;
    padding: 24px;
    background: var(--card-background);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
}

.filter-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.search-input, .tag-filter, .sort-select {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 500;
    font-size: 14px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    transition: all 0.2s ease;
    color: var(--text-primary);
}

.search-input {
    flex: 1;
    min-width: 280px;
}

.search-input:focus, .tag-filter:focus, .sort-select:focus {
    outline: none;
    border-color: var(--e2c-yellow);
    background: var(--e2c-yellow);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.search-input::placeholder {
    color: var(--text-secondary);
    font-weight: 400;
}

.tag-filter, .sort-select {
    min-width: 160px;
}

.tags {
    margin-top: 0.5rem;
}

.tag {
    display: inline-block;
    background: #e9ecef;
    color: #495057;
    padding: 0.25rem 0.5rem;
    margin: 0.25rem 0.25rem 0 0;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.tag:hover {
    background: var(--e2c-yellow);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.card-title-link {
    display: inline-block;
    padding: 8px 16px;
    background: var(--e2c-yellow);
    color: var(--text-primary) !important;
    text-decoration: none !important;
    border-radius: 12px;
    margin: 8px 0;
    font-weight: 600;
    font-size: 1.25rem;
    transition: all 0.2s ease;
    border: 2px solid var(--e2c-yellow);
}

.card-title-link:hover {
    background: var(--e2c-dark-yellow);
    border-color: var(--e2c-dark-yellow);
    color: var(--text-primary) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.card.hidden {
    display: none;
}

@media (max-width: 768px) {
    .filter-controls {
        margin-bottom: 32px;
        padding: 16px;
    }
    
    .filter-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    
    .search-input, .tag-filter, .sort-select {
        width: 100%;
        min-width: unset;
        padding: 8px 14px;
        font-size: 12px;
    }
}
</style>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const searchInput = document.getElementById('searchInput');
    const tagFilter = document.getElementById('tagFilter');
    const sortBy = document.getElementById('sortBy');
    const cardGrid = document.getElementById('cardGrid');
    const cards = Array.from(cardGrid.querySelectorAll('.card'));
    
    // Check for URL parameter to pre-filter by tag
    const urlParams = new URLSearchParams(window.location.search);
    const preSelectedTag = urlParams.get('tag');
    
    // Collect all unique tags
    const allTags = new Set();
    cards.forEach(card => {
        const tags = card.dataset.tags;
        if (tags) {
            tags.split(',').forEach(tag => allTags.add(tag.trim()));
        }
    });
    
    // Populate tag filter dropdown
    Array.from(allTags).sort().forEach(tag => {
        const option = document.createElement('option');
        option.value = tag;
        option.textContent = tag;
        if (preSelectedTag && tag === preSelectedTag) {
            option.selected = true;
        }
        tagFilter.appendChild(option);
    });
    
    function updateTagFilter() {
        // Store currently selected value
        const currentSelection = tagFilter.value;
        
        // Clear existing options except "All tags"
        tagFilter.innerHTML = '<option value="">All tags</option>';
        
        // Collect tags from currently visible cards
        const visibleTags = new Set();
        cards.forEach(card => {
            if (!card.classList.contains('hidden')) {
                const tags = card.dataset.tags;
                if (tags) {
                    tags.split(',').forEach(tag => visibleTags.add(tag.trim()));
                }
            }
        });
        
        // Populate tag filter dropdown with current tags
        Array.from(visibleTags).sort().forEach(tag => {
            const option = document.createElement('option');
            option.value = tag;
            option.textContent = tag;
            // Maintain selection if this tag was previously selected
            if (tag === currentSelection) {
                option.selected = true;
            }
            tagFilter.appendChild(option);
        });
    }
    
    function filterAndSort() {
        const searchTerm = searchInput.value.toLowerCase();
        const selectedTag = tagFilter.value;
        const sortCriteria = sortBy.value;
        
        // Filter cards
        const filteredCards = cards.filter(card => {
            const title = card.dataset.title.toLowerCase();
            const description = card.dataset.description.toLowerCase();
            const tags = card.dataset.tags;
            
            // Text search
            const matchesSearch = !searchTerm || 
                title.includes(searchTerm) || 
                description.includes(searchTerm);
            
            // Tag filter
            const matchesTag = !selectedTag || 
                (tags && tags.split(',').map(t => t.trim()).includes(selectedTag));
            
            return matchesSearch && matchesTag;
        });
        
        // Sort filtered cards
        filteredCards.sort((a, b) => {
            if (sortCriteria === 'title') {
                return a.dataset.title.localeCompare(b.dataset.title);
            } else if (sortCriteria === 'date') {
                const dateA = new Date(a.dataset.date || '1970-01-01');
                const dateB = new Date(b.dataset.date || '1970-01-01');
                return dateB - dateA; // Most recent first
            }
            return 0;
        });
        
        // Hide all cards first
        cards.forEach(card => card.classList.add('hidden'));
        
        // Show and reorder filtered cards
        filteredCards.forEach((card, index) => {
            card.classList.remove('hidden');
            card.style.order = index;
        });
        
        // Update tag filter to show only current tags
        updateTagFilter();
    }
    
    // Event listeners
    searchInput.addEventListener('input', filterAndSort);
    tagFilter.addEventListener('change', function() {
        // Update URL when tag filter changes
        const selectedTag = tagFilter.value;
        const url = new URL(window.location);
        if (selectedTag) {
            url.searchParams.set('tag', selectedTag);
        } else {
            url.searchParams.delete('tag');
        }
        window.history.replaceState({}, '', url);
        filterAndSort();
    });
    sortBy.addEventListener('change', filterAndSort);
    
    // Initial sort by title
    filterAndSort();
});
</script>
{{ end }}