@extends('layouts.app')

@section('title', 'Wissenschaftliche Dokumente | kotsch.tech')
@section('meta_description', 'Wissenschaftliche Dokumente von kotsch.tech mit direkter PDF-Vorschau und Download.')
@section('structured_data')
    <script type="application/ld+json">
        {!! json_encode([
            '@' . 'context' => 'https://schema.org',
            '@' . 'type' => 'CollectionPage',
            'name' => 'Wissenschaftliche Dokumente',
            'url' => url('/dokumente'),
            'mainEntity' => [
                '@' . 'type' => 'ItemList',
                'itemListElement' => $documents->map(fn ($document, $index) => [
                    '@' . 'type' => 'ListItem',
                    'position' => $index + 1,
                    'item' => [
                        '@' . 'type' => 'DigitalDocument',
                        'name' => $document['title'],
                        'description' => $document['description'],
                        'url' => $document['url'],
                        'encodingFormat' => 'application/pdf',
                    ],
                ])->all(),
            ],
        ], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT) !!}
    </script>
@endsection

@section('content')
    <style>
        .documents-hero {
            padding: 118px 5% 58px;
            background:
                radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.12), transparent 32%),
                linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
            border-bottom: 1px solid rgba(226, 232, 240, 0.9);
            text-align: center;
        }

        .documents-hero .container {
            display: grid;
            justify-items: center;
        }

        .documents-hero h1 {
            max-width: 940px;
            margin-bottom: 18px;
            color: var(--text-main);
            font-size: clamp(2.7rem, 7vw, 4.6rem);
            font-weight: 900;
            line-height: 0.98;
            letter-spacing: -0.055em;
        }

        .documents-hero h1 span {
            color: var(--primary);
        }

        .documents-hero p {
            max-width: 720px;
            color: var(--text-muted);
            font-size: clamp(1.05rem, 2vw, 1.2rem);
            line-height: 1.75;
        }

        .documents-section {
            max-width: 100%;
            padding: 42px 5% 120px;
            background: #f8fafc;
        }

        .documents-grid {
            display: grid;
            gap: 28px;
        }

        .document-card {
            display: grid;
            grid-template-columns: minmax(280px, 0.88fr) minmax(320px, 1.12fr);
            overflow: hidden;
            border: 1px solid #e2e8f0;
            border-radius: 24px;
            background: #ffffff;
            box-shadow: var(--shadow-soft);
        }

        .document-preview-shell {
            min-height: 430px;
            padding: 14px;
            background:
                radial-gradient(circle at 20% 15%, rgba(37, 99, 235, 0.14), transparent 30%),
                linear-gradient(180deg, #0f172a 0%, #172554 100%);
        }

        .document-preview {
            width: 100%;
            height: 100%;
            min-height: 402px;
            overflow: hidden;
            border-radius: 16px;
            background: #ffffff;
        }

        .document-preview iframe {
            width: 100%;
            height: 100%;
            min-height: 402px;
            border: 0;
            background: #ffffff;
        }

        .document-preview img {
            width: 100%;
            height: 100%;
            min-height: 402px;
            object-fit: contain;
            background: #ffffff;
        }

        .document-body {
            display: grid;
            align-content: center;
            gap: 18px;
            padding: clamp(24px, 4vw, 40px);
        }

        .document-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.82rem;
            font-weight: 800;
        }

        .document-topic {
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

        .document-body h2 {
            margin: 0;
            color: var(--text-dark);
            font-size: clamp(1.65rem, 3vw, 2.3rem);
            line-height: 1.08;
            letter-spacing: -0.04em;
            overflow-wrap: anywhere;
        }

        .document-body p {
            color: var(--text-muted);
            line-height: 1.75;
        }

        .document-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .document-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 48px;
            padding: 12px 18px;
            border-radius: 14px;
            background: var(--text-dark);
            color: #ffffff;
            font-weight: 900;
            text-decoration: none;
        }

        .document-action-secondary {
            border: 1px solid #dbeafe;
            background: #ffffff;
            color: var(--text-dark);
        }

        .documents-empty {
            padding: 34px;
            border: 1px solid #dbeafe;
            border-radius: 24px;
            background: #ffffff;
            color: var(--text-muted);
            font-weight: 700;
        }

        @media (max-width: 820px) {
            .documents-hero {
                padding: 108px 5% 42px;
            }

            .document-card {
                grid-template-columns: 1fr;
            }

            .document-preview-shell {
                min-height: 360px;
            }

            .document-preview,
            .document-preview iframe {
                min-height: 332px;
            }
        }
    </style>

    <header class="documents-hero">
        <div class="container">
            <span class="label">Dokumente</span>
            <h1>Wissenschaftliche Dokumente <span>mit Vorschau</span></h1>
            <p>Sammlung fachlicher Arbeiten, Rechenwege und Ausarbeitungen direkt als PDF einsehbar.</p>
        </div>
    </header>

    <section class="documents-section">
        <div class="container">
            @if($documents->isEmpty())
                <div class="documents-empty">Noch sind keine Dokumente hinterlegt.</div>
            @else
                <div class="documents-grid">
                    @foreach($documents as $document)
                        <article class="document-card reveal">
                            <div class="document-preview-shell">
                                <div class="document-preview">
                                    @if($document['preview'])
                                        <img src="{{ asset($document['preview']) }}" alt="Erste Seite von {{ $document['title'] }}" loading="lazy">
                                    @else
                                        <iframe
                                            src="{{ $document['url'] }}#page=1&toolbar=0&navpanes=0"
                                            title="Vorschau: {{ $document['title'] }}"
                                            loading="lazy">
                                        </iframe>
                                    @endif
                                </div>
                            </div>

                            <div class="document-body">
                                <div class="document-meta">
                                    <span class="document-topic">{{ $document['topic'] }}</span>
                                    @if($document['published_at'])
                                        <span>{{ $document['published_at'] }}</span>
                                    @endif
                                    @if($document['pages'])
                                        <span>{{ $document['pages'] }} Seiten</span>
                                    @endif
                                    <span>{{ $document['size'] }}</span>
                                </div>

                                <h2>{{ $document['title'] }}</h2>
                                <p>{{ $document['description'] }}</p>

                                <div class="document-actions">
                                    <a class="document-action" href="{{ $document['url'] }}" target="_blank" rel="noopener" data-no-localize>
                                        PDF öffnen <i class="fas fa-arrow-up-right-from-square"></i>
                                    </a>
                                    <a class="document-action document-action-secondary" href="{{ route('documents.download', $document['file_name']) }}" data-no-localize>
                                        Herunterladen <i class="fas fa-download"></i>
                                    </a>
                                </div>
                            </div>
                        </article>
                    @endforeach
                </div>
            @endif
        </div>
    </section>
@endsection