/* Article card components - Card layouts, metadata, and interactions */
/* Requires: badges.css for topic-tag, shared-animations.css for transitions */

/* T021: Responsive article grid layout */
.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.articles-grid[data-layout="triple"] {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .articles-grid[data-layout="triple"] {
        grid-template-columns: 1fr;
    }
}

/* T015: Article card base styles with elevation */
/* WP03 T008: Enhanced with glassmorphism and performance optimizations */
.article-card {
    position: relative;
    background: var(--surface-card);
    border-radius: 1.5rem;
    border: 1px solid var(--surface-card-border);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    cursor: pointer;
    transition: transform var(--duration-normal) var(--ease-in-out-smooth), box-shadow var(--duration-normal) var(--ease-in-out-smooth), border-color var(--duration-normal) var(--ease-in-out-smooth);
    box-shadow: 0 30px 65px -40px rgba(15, 23, 42, 0.4);
}

.article-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.12), transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-in-out-smooth);
    pointer-events: none;
}

.article-card::after {
    content: '';
    position: absolute;
    inset: -30%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.18), transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-slow) var(--ease-in-out-smooth);
    pointer-events: none;
}

.article-card:hover {
    transform: translateY(-6px);
    border-color: rgba(var(--primary-rgb), 0.35);
    box-shadow: 0 40px 75px -45px rgba(var(--primary-rgb), 0.65);
}

.article-card:hover::before {
    opacity: 1;
}

.article-card:hover::after {
    opacity: 0.6;
}

/* Visual effect for read articles - Eye icon next to score */
.article-card.read::before {
    display: none; /* Remove the absolute positioned icon */
}

/* Add read status to article-meta-bar instead via JS logic,
   but since we can't easily inject HTML without JS changes,
   we'll target the quality-score inside a read card */

.article-card.read .quality-score::before {
    content: '\f06e'; /* fa-eye */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    margin-right: 0.5rem;
    /* Color matches the user's selected theme color */
    color: var(--primary);
    font-size: 0.875rem;
    opacity: 1; /* Increased opacity to make the theme color pop */
}

/* If no quality score exists (e.g. personal posts), fallback to top right */
.article-card.read:not(:has(.quality-score))::before {
    content: '\f06e'; /* fa-eye */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    /* Use primary color to match theme */
    color: var(--primary);
    font-size: 1rem;
    z-index: 10;
    animation: fadeIn 0.3s ease-in-out;
    display: block;
}

/* Dark mode fallback adjustment - opacity tweaks */
[data-theme="dark"] .article-card.read:not(:has(.quality-score))::before {
    opacity: 0.9;
}



[data-theme="dark"] .article-card {
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(148, 163, 184, 0.15);
    box-shadow: 0 30px 65px -40px rgba(0, 0, 0, 0.9);
}

[data-theme="dark"] .article-card:hover {
    border-color: rgba(var(--primary-rgb), 0.55);
    box-shadow: 0 40px 80px -45px rgba(var(--primary-rgb), 0.75);
}

/* Article content layout */
.article-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    z-index: 2;
}

.article-content:focus-visible {
    outline: 2px solid rgba(var(--primary-rgb), 0.5);
    outline-offset: 6px;
    border-radius: 1rem;
}

.article-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.article-source-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    background: var(--chip-bg);
    border: 1px solid var(--chip-border);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: capitalize;
}

.article-source-chip::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary-500);
}

.article-badges {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-card h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--duration-fast) var(--ease-in-out-smooth);
}

.article-card:hover h2 {
    color: var(--color-primary-600);
}

.article-summary-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 1rem;
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] .article-summary-wrapper {
    background: rgba(148, 163, 184, 0.08);
    border-color: rgba(148, 163, 184, 0.2);
}

.article-summary {
    margin: 0;
    color: var(--color-text-secondary);
}

.article-translation-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.article-translation-inline .translation-badge {
    background: rgba(var(--primary-rgb), 0.12);
    border-radius: 999px;
    padding: 0.35rem 0.75rem;
    color: var(--color-primary-700);
}

/* Topics and tags */
.article-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

/* Article metadata section */
.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    margin-top: 0.5rem;
    gap: 1rem;
    position: relative;
    z-index: 5;
    pointer-events: auto;
    isolation: isolate;
}

.article-footer-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* WP04 T016: Details panel with CSS Grid accordion animation */
.details-panel {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.details-panel > .panel-content {
    overflow: hidden;
}

/* Expanded state - CSS Grid animation */
.article-card.details-expanded .details-panel {
    grid-template-rows: 1fr;
}

/* Details content panel (inner content wrapper) */
.details-content {
    margin-top: 1rem;
    padding: 1.25rem;
    background: rgba(15, 23, 42, 0.03);
    border-radius: 1.25rem;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: inset 0 1px 0 var(--overlay-subtle);
}

[data-theme="dark"] .details-content {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(148, 163, 184, 0.25);
    box-shadow: inset 0 1px 0 rgba(148, 163, 184, 0.1);
}

/* Toggle button styles */
.details-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: 0.5rem;
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all 200ms ease;
}

.details-toggle:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary-300);
}

[data-theme="dark"] .details-toggle:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--color-primary-600);
}

/* WP04 T016: Toggle icon rotation */
.details-toggle .toggle-icon {
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card.details-expanded .details-toggle .toggle-icon {
    transform: rotate(180deg);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .details-panel {
        transition: none;
    }
    .details-toggle .toggle-icon {
        transition: none;
    }
}

/* WP05 T022: Metadata accordion sections styling */
.metadata-accordions {
    margin-top: 1.5rem;
    border: 1px solid var(--color-border-subtle);
    border-radius: 0.5rem;
    overflow: hidden;
}

/* Metadata content sections */
.details-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--color-bg-elevated);
    border-radius: 0.375rem;
}

.detail-icon {
    color: var(--color-primary-600);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

[data-theme="dark"] .detail-item {
    background-color: var(--overlay-subtle);
}

/* Impact Analysis section */
.impact-analysis p {
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin: 0;
}

/* Actionable Insights section */
.actionable-insights .insights-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.insight-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--color-primary-500);
    border-radius: 0.25rem;
}

.insight-icon {
    color: var(--color-primary-600);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

[data-theme="dark"] .insight-item {
    background-color: rgba(59, 130, 246, 0.1);
}

/* Additional Context section */
.additional-context p {
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin: 0;
}

/* No metadata fallback */
.no-metadata {
    padding: 2rem;
    text-align: center;
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* Enhanced Accordion Styling within Article Cards */
.metadata-accordions .accordion-section {
    border-bottom: 1px solid var(--color-border-subtle);
    background-color: transparent;
}

.metadata-accordions .accordion-section:last-child {
    border-bottom: none;
}

.metadata-accordions .accordion-header {
    background-color: rgba(var(--primary-rgb), 0.02);
    border-left: 3px solid transparent;
    transition: all var(--duration-fast) ease;
}

.metadata-accordions .accordion-header:hover {
    background-color: rgba(var(--primary-rgb), 0.05);
    padding-left: 1.25rem; /* Slight slide effect */
}

.metadata-accordions .accordion-section.expanded .accordion-header {
    background-color: rgba(var(--primary-rgb), 0.08);
    border-left-color: var(--color-primary-500);
    color: var(--color-primary-700);
    font-weight: 600;
}

[data-theme="dark"] .metadata-accordions .accordion-header {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="dark"] .metadata-accordions .accordion-header:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .metadata-accordions .accordion-section.expanded .accordion-header {
    background-color: rgba(var(--primary-rgb), 0.15);
    color: var(--color-primary-300);
}

/* Reddit Metadata Styling */
.reddit-metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    padding: 0.5rem 0;
}

.reddit-stat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--color-bg-elevated);
    border-radius: 0.5rem;
    border: 1px solid var(--color-border-subtle);
    transition: transform var(--duration-fast) var(--ease-out-back);
}

.reddit-stat-item:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary-300);
}

.reddit-stat-item .stat-icon {
    font-size: 1.25rem;
    color: var(--color-primary-500);
    width: 24px;
    text-align: center;
}

.reddit-stat-item .stat-content {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.reddit-stat-item .stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    font-weight: 600;
}

.reddit-stat-item .stat-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Dark mode adjustments for Reddit stats */
[data-theme="dark"] .reddit-stat-item {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .reddit-stat-item:hover {
    border-color: var(--color-primary-700);
    background-color: rgba(255, 255, 255, 0.05);
}

/* WP07 T033: Mobile Responsive Optimizations */
@media (max-width: 768px) {
    /* Single column layout */
    .articles-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }

    .article-card {
        padding: 1rem;
        min-height: auto;
    }

    /* Larger touch targets (≥44x44px for accessibility) */
    .details-toggle,
    .save-button,
    .share-button {
        min-width: 44px;
        min-height: 44px;
        padding: 0.75rem;
    }

    /* Smaller badge sizes for mobile */
    .quality-score,
    .novelty-score {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }

    /* Stack badges vertically if needed */
    .article-badges {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    /* Adjust title for mobile (3 lines instead of 2) */
    .article-card h2 {
        font-size: 1.125rem;
        -webkit-line-clamp: 3;
    }

    /* Adjust metadata for mobile */
    .article-footer {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .article-footer-left {
        flex-wrap: wrap;
    }

    /* Accordion adjustments */
    .accordion-header {
        padding: 0.75rem;
        font-size: 0.9375rem;
    }

    .accordion-inner {
        padding: 0 0.75rem;
    }

    /* Details panel adjustments */
    .details-content {
        padding: 0.75rem;
    }

    .metadata-accordions {
        margin-top: 1rem;
    }
}

/* Very small screens */
@media (max-width: 480px) {
    .article-card {
        padding: 0.75rem;
        border-radius: 0.75rem;
    }

    .article-card h2 {
        font-size: 1rem;
    }

    .details-content {
        padding: 0.5rem;
    }

    /* Make sure touch targets remain adequate */
    .details-toggle {
        padding: 0.875rem 1rem;
    }

    /* Smaller spacing for very small screens */
    .article-badges {
        gap: 0.375rem;
    }

    .article-footer {
        gap: 0.5rem;
        padding-top: 0.75rem;
    }
}