/* Blog & Article Styles */
.hero {
    padding: 64px 0 24px;
}

.kicker {
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
}

h1 {
    margin-bottom: 14px;
    font-size: 44px;
    line-height: 1.07;
    letter-spacing: -1px;
}

.hero p {
    max-width: 680px;
    color: var(--text-2);
    font-size: 16px;
    line-height: 1.6;
}

/* Author External Publications Action Chips */
.author-publications {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.pub-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--faint);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-right: 4px;
}

.pub-ext-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 13px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--text-2);
    font-size: 12.5px;
    font-weight: 500;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), border-color 180ms ease, color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.pub-ext-link:hover {
    transform: translateY(-1.5px);
    color: var(--text);
    box-shadow: var(--shadow-md);
    background: var(--bg-card);
}

.pub-ext-logo {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
    transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), color 180ms ease;
    display: inline-block;
    vertical-align: middle;
}

.logo-medium {
    color: var(--text-2);
}
:is(html.light, body.light) .logo-medium {
    color: #18181b;
}

.logo-octoparse {
    color: #3b82f6;
}
:is(html.light, body.light) .logo-octoparse {
    color: #2563eb;
}

.logo-chat4data {
    color: var(--text);
}
:is(html.light, body.light) .logo-chat4data {
    color: #18181b;
}

.pub-ext-link:hover .pub-ext-logo {
    transform: scale(1.08);
}

.pub-ext-name {
    color: var(--text);
    font-weight: 550;
    letter-spacing: -0.01em;
}

.pub-ext-handle {
    color: var(--faint);
    font-size: 11.5px;
    font-weight: 400;
}

.pub-ext-icon {
    width: 11px;
    height: 11px;
    color: var(--faint);
    flex-shrink: 0;
    transition: transform 180ms ease, color 180ms ease;
}

.pub-ext-link:hover .pub-ext-icon {
    transform: translate(2px, -2px);
    color: currentColor;
}

/* Hover Accents by Publisher */
.pub-ext-medium:hover {
    border-color: rgba(255, 255, 255, 0.4);
}
:is(html.light, body.light) .pub-ext-medium:hover {
    border-color: rgba(24, 24, 27, 0.45);
}
.pub-ext-medium:hover .logo-medium {
    color: var(--text);
}
:is(html.light, body.light) .pub-ext-medium:hover .logo-medium {
    color: #09090b;
}

.pub-ext-octoparse:hover {
    border-color: rgba(59, 130, 246, 0.5);
    color: #3b82f6;
}
:is(html.light, body.light) .pub-ext-octoparse:hover {
    border-color: rgba(37, 99, 235, 0.4);
    color: #2563eb;
}
.pub-ext-octoparse:hover .pub-ext-name {
    color: #3b82f6;
}
:is(html.light, body.light) .pub-ext-octoparse:hover .pub-ext-name {
    color: #2563eb;
}

.pub-ext-chat4data:hover {
    border-color: rgba(251, 146, 60, 0.5);
    color: #fb923c;
}
:is(html.light, body.light) .pub-ext-chat4data:hover {
    border-color: rgba(234, 88, 12, 0.4);
    color: #ea580c;
}
.pub-ext-chat4data:hover .pub-ext-name {
    color: #fb923c;
}
:is(html.light, body.light) .pub-ext-chat4data:hover .pub-ext-name {
    color: #ea580c;
}
.pub-ext-chat4data:hover .logo-chat4data {
    color: var(--text);
}
:is(html.light, body.light) .pub-ext-chat4data:hover .logo-chat4data {
    color: #09090b;
}

.pub-ext-chat4data .pub-accent {
    color: #fb923c;
    transition: color 180ms ease;
}
:is(html.light, body.light) .pub-ext-chat4data .pub-accent {
    color: #ea580c;
}

/* Timeline-Style Filter (Matching Image 1) */
.blog-filter-section {
    margin-top: 32px;
    margin-bottom: 24px;
}

.timeline-filter.blog-filter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 11.5px;
}

.timeline-filter-label {
    color: var(--faint);
    font-size: 12px;
    font-weight: 450;
    margin-right: 2px;
}

.filter-chip {
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--text-2);
    border-radius: 999px;
    padding: 6px 13px;
    cursor: pointer;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    line-height: 1;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    box-shadow: var(--shadow-sm);
    transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), border-color 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
    user-select: none;
    -webkit-user-select: none;
}

.filter-chip:hover {
    border-color: var(--accent-border);
    color: var(--text);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.filter-chip.is-active {
    border-color: var(--accent-border);
    background: var(--accent-soft);
    color: var(--accent);
    box-shadow: 0 2px 10px var(--accent-soft);
}

.filter-count {
    color: var(--faint);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 10.5px;
    font-weight: 500;
    pointer-events: none;
}

.filter-chip.is-active .filter-count {
    color: var(--accent);
}

/* Unified Articles Grid (Matching Writing Section, Image 3) */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    padding-bottom: 64px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-card);
    padding: 20px;
    min-height: 120px;
    box-shadow: var(--shadow-sm);
    transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1), border-color 220ms ease, box-shadow 220ms ease;
    text-decoration: none;
    color: inherit;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.blog-card[hidden],
.blog-card.is-hidden {
    display: none !important;
}

.blog-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-border);
    box-shadow: var(--shadow-lg);
}

.blog-card:hover .blog-card-title {
    color: var(--accent);
}

/* Publisher-Specific Hover Styles:
   Octoparse -> Brand Blue (#3b82f6 / #2563eb)
   Chat4Data -> Single Orange
   Medium    -> Pure White (Dark) / Pure Black (Light)
*/

/* Octoparse */
.blog-card[data-publisher="octoparse"]:hover,
.blog-card:has(.pub-octoparse):hover {
    border-color: rgba(59, 130, 246, 0.45);
    box-shadow: 0 14px 34px -4px rgba(59, 130, 246, 0.16), var(--shadow-md);
}

.blog-card[data-publisher="octoparse"]:hover .blog-card-title,
.blog-card:has(.pub-octoparse):hover .blog-card-title {
    color: #3b82f6;
}

:is(html.light, body.light) .blog-card[data-publisher="octoparse"]:hover,
:is(html.light, body.light) .blog-card:has(.pub-octoparse):hover {
    border-color: rgba(37, 99, 235, 0.35);
    box-shadow: 0 14px 34px -4px rgba(37, 99, 235, 0.12), var(--shadow-md);
}

:is(html.light, body.light) .blog-card[data-publisher="octoparse"]:hover .blog-card-title,
:is(html.light, body.light) .blog-card:has(.pub-octoparse):hover .blog-card-title {
    color: #2563eb;
}

/* Chat4Data (Single Orange) */
.blog-card[data-publisher="chat4data"]:hover,
.blog-card:has(.pub-chat4data):hover {
    border-color: rgba(251, 146, 60, 0.45);
    box-shadow: 0 14px 34px -4px rgba(251, 146, 60, 0.16), var(--shadow-md);
}

.blog-card[data-publisher="chat4data"]:hover .blog-card-title,
.blog-card:has(.pub-chat4data):hover .blog-card-title {
    color: #fb923c;
}

:is(html.light, body.light) .blog-card[data-publisher="chat4data"]:hover,
:is(html.light, body.light) .blog-card:has(.pub-chat4data):hover {
    border-color: rgba(234, 88, 12, 0.35);
    box-shadow: 0 14px 34px -4px rgba(234, 88, 12, 0.12), var(--shadow-md);
}

:is(html.light, body.light) .blog-card[data-publisher="chat4data"]:hover .blog-card-title,
:is(html.light, body.light) .blog-card:has(.pub-chat4data):hover .blog-card-title {
    color: #ea580c;
}

/* Medium (Monochrome Black / White) */
.blog-card[data-publisher="medium"]:hover,
.blog-card:has(.pub-medium):hover {
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 14px 34px -4px rgba(255, 255, 255, 0.08), var(--shadow-md);
}

.blog-card[data-publisher="medium"]:hover .blog-card-title,
.blog-card:has(.pub-medium):hover .blog-card-title {
    color: #ffffff;
}

:is(html.light, body.light) .blog-card[data-publisher="medium"]:hover,
:is(html.light, body.light) .blog-card:has(.pub-medium):hover {
    border-color: rgba(24, 24, 27, 0.45);
    box-shadow: 0 14px 34px -4px rgba(24, 24, 27, 0.1), var(--shadow-md);
}

:is(html.light, body.light) .blog-card[data-publisher="medium"]:hover .blog-card-title,
:is(html.light, body.light) .blog-card:has(.pub-medium):hover .blog-card-title {
    color: #09090b;
}

.blog-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 11px;
    letter-spacing: 0.4px;
}

.blog-card-date {
    color: var(--faint);
    font-weight: 450;
    font-size: 11px;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.blog-card-title {
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 14.5px;
    line-height: 1.4;
    font-weight: 500;
    letter-spacing: -0.012em;
    transition: color 200ms ease;
}

.blog-card-desc {
    color: var(--muted);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 13px;
    line-height: 1.55;
    letter-spacing: -0.006em;
    margin-top: 8px;
}

/* Publisher Sources (Clean Editorial Typography):
   Octoparse: brand blue (#3b82f6 / #2563eb)
   Chat4Data: slate grey
   Medium: pure black / white
*/
.pub-badge {
    display: inline-flex;
    align-items: center;
    padding: 0;
    background: none;
    border: none;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    line-height: 1.2;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", "Inter", -apple-system-body, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Octoparse blue */
.pub-badge.pub-octoparse,
.blog-card .pub-badge.pub-octoparse {
    color: #3b82f6;
    background: none;
    border: none;
}

:is(html.light, body.light) .pub-badge.pub-octoparse,
:is(html.light, body.light) .blog-card .pub-badge.pub-octoparse {
    color: #2563eb;
}

/* Chat4Data: grey first part, orange second part */
.pub-badge.pub-chat4data {
    color: #94a3b8;
    background: none;
    border: none;
}

:is(html.light, body.light) .pub-badge.pub-chat4data {
    color: #64748b;
}

.pub-badge.pub-chat4data .pub-accent {
    color: #fb923c;
    transition: color 200ms ease;
}

:is(html.light, body.light) .pub-badge.pub-chat4data .pub-accent {
    color: #ea580c;
}

/* Medium black / white */
.pub-badge.pub-medium {
    color: var(--text-2);
    background: none;
    border: none;
}

:is(html.light, body.light) .pub-badge.pub-medium {
    color: #18181b;
}

/* Responsive Breakpoints */
@media (max-width: 760px) {
    h1 {
        font-size: 34px;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 48px;
    }

    .filter-chip {
        font-size: 12px;
        padding: 5px 11px;
    }
}

@media (max-width: 520px) {
    .hero p {
        font-size: 15px;
    }

    .timeline-filter.blog-filter {
        gap: 8px;
    }
}