/* KI Research Dashboard - Minimalistisches Design */

:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #242424;
    --text-primary: #e5e5e5;
    --text-secondary: #a0a0a0;
    --text-muted: #666;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border: #2a2a2a;
    --success: #22c55e;
    --warning: #eab308;
    --info: #3b82f6;

    /* Category Colors */
    --anthropic: #d97706;
    --openai: #10b981;
    --google: #3b82f6;
    --microsoft: #06b6d4;
    --perplexity: #8b5cf6;
    --other: #6b7280;

    /* Relevance Colors */
    --high: #ef4444;
    --medium: #f59e0b;
    --low: #6b7280;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.report-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.report-selector label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.report-selector select {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 200px;
}

.report-selector select:hover {
    border-color: var(--accent);
}

/* Main Content */
main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Loading State */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h2 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state code {
    display: inline-block;
    background: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Meta Section */
.meta-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.meta-grid {
    display: flex;
    gap: 2rem;
    margin-bottom: 1rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.meta-value {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.meta-summary {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* Quick Stats */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.2s;
}

.stat-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-count {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Filter Section */
.filter-section {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.filter-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.375rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Sections */
.report-section {
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.section-icon {
    font-size: 1.25rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.section-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

/* Items Grid */
.items-grid {
    display: grid;
    gap: 1rem;
}

/* Item Card */
.item-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color 0.2s;
}

.item-card:hover {
    border-color: var(--border);
    border-left-color: var(--accent);
}

.item-card[data-relevance="high"] {
    border-left: 3px solid var(--high);
}

.item-card[data-relevance="medium"] {
    border-left: 3px solid var(--medium);
}

.item-card[data-relevance="low"] {
    border-left: 3px solid var(--low);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.item-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.item-meta {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.item-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-category {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-category[data-category="anthropic"] { background: rgba(217, 119, 6, 0.2); color: var(--anthropic); }
.badge-category[data-category="openai"] { background: rgba(16, 185, 129, 0.2); color: var(--openai); }
.badge-category[data-category="google"] { background: rgba(59, 130, 246, 0.2); color: var(--google); }
.badge-category[data-category="microsoft"] { background: rgba(6, 182, 212, 0.2); color: var(--microsoft); }
.badge-category[data-category="perplexity"] { background: rgba(139, 92, 246, 0.2); color: var(--perplexity); }

.badge-relevance {
    font-weight: 600;
}

.badge-relevance[data-relevance="high"] { background: rgba(239, 68, 68, 0.2); color: var(--high); }
.badge-relevance[data-relevance="medium"] { background: rgba(245, 158, 11, 0.2); color: var(--medium); }
.badge-relevance[data-relevance="low"] { background: rgba(107, 114, 128, 0.2); color: var(--low); }

.item-summary {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.item-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.source-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 4px;
    transition: background 0.2s;
}

.source-link:hover {
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-hover);
}

.source-tier {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.item-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    main {
        padding: 1rem;
    }

    .meta-grid {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-section {
        flex-direction: column;
    }

    .item-header {
        flex-direction: column;
    }

    .item-meta {
        align-self: flex-start;
    }
}