/* ═══════════════════════════════════════════════════════════════
   AquaBobble — Blog Single Post
   ═══════════════════════════════════════════════════════════════ */

   h2.screen-reader-text {
    display: none !important;
}

/* ═══════════ HERO ═══════════ */
.ab-single__hero {
    position: relative;
    padding-top: calc(var(--header-height) + var(--space-4xl));
    padding-bottom: var(--space-4xl);
    background: var(--color-primary-dark);
    overflow: hidden;
}
.ab-single__hero::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}
.ab-single__hero-inner {
    max-width: 52rem;
    position: relative;
    z-index: 2;
}
.ab-single__meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
    font-size: var(--text-sm);
    color: rgba(255,255,255,0.6);
}
.ab-single__cat {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--color-accent-light);
    border-radius: var(--radius-full);
    font-weight: var(--weight-medium);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: default;
}
.ab-single__date::before,
.ab-single__reading::before {
    content: '·';
    margin-right: var(--space-md);
}
.ab-single__title {
    font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}
.ab-single__excerpt {
    font-size: var(--text-lg);
    color: rgba(255,255,255,0.7);
    line-height: var(--leading-normal);
    max-width: 44rem;
}

/* ═══════════ COVER IMAGE ═══════════ */
.ab-single__cover {
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}
.ab-single__cover-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    object-fit: cover;
    max-height: 28rem;
}

/* ═══════════ BODY ═══════════ */
.ab-single__body {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
}
.ab-single__cover + .ab-single__body {
    padding-top: 0;
}

/* ═══════════ BODY GRID ═══════════ */
.ab-single__grid {
    display: grid;
    grid-template-columns: 1fr 18rem;
    gap: var(--space-4xl);
}

/* ═══════════ ARTICLE CONTENT ═══════════ */
.ab-single__content {
    max-width: 48rem;
    font-size: var(--text-base);
    line-height: var(--leading-loose);
    color: var(--color-text);
}
.ab-single__content h2 {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-lg);
    line-height: var(--leading-tight);
}
.ab-single__content h3 {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
}
.ab-single__content h4 {
    font-size: var(--text-lg);
    font-weight: var(--weight-medium);
    color: var(--color-text);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}
.ab-single__content p {
    margin-bottom: var(--space-lg);
}
.ab-single__content ul {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
    list-style: disc;
}
.ab-single__content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
    list-style: decimal;
}
.ab-single__content li {
    margin-bottom: var(--space-sm);
}
.ab-single__content ul li::marker {
    color: var(--color-primary);
}
.ab-single__content a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}
.ab-single__content a:hover {
    color: var(--color-primary-dark);
}
.ab-single__content blockquote {
    border-left: 3px solid var(--color-primary);
    padding: var(--space-lg) var(--space-xl);
    margin: var(--space-2xl) 0;
    background: var(--color-light);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-text-light);
}
.ab-single__content blockquote p:last-child {
    margin-bottom: 0;
}
.ab-single__content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
}
.ab-single__content figure {
    margin: var(--space-2xl) 0;
}
.ab-single__content figcaption {
    font-size: var(--text-sm);
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--space-sm);
}
.ab-single__content pre {
    background: var(--color-text);
    color: var(--color-light);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--space-xl) 0;
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}
.ab-single__content code {
    background: var(--color-light);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}
.ab-single__content pre code {
    background: none;
    padding: 0;
}
.ab-single__content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-xl) 0;
    font-size: var(--text-sm);
}
.ab-single__content th,
.ab-single__content td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
    text-align: left;
}
.ab-single__content th {
    font-weight: var(--weight-medium);
    color: var(--color-text);
    background: var(--color-light);
}

/* ═══════════ SIDEBAR ═══════════ */
.ab-single__sidebar {
    position: relative;
}
.ab-single__sidebar-sticky {
    position: sticky;
    top: calc(var(--header-height) + var(--space-xl));
}
.ab-single__toc {
    margin-bottom: var(--space-2xl);
}
.ab-single__toc-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}
#toc-nav a {
    display: block;
    padding: var(--space-sm) 0;
    padding-left: 0.5em;
    font-size: var(--text-sm);
    color: var(--color-text-light);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
    line-height: var(--leading-normal);
}
#toc-nav a:hover,
#toc-nav a.is-active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}
#toc-nav a[data-level="3"] {
    padding-left: 0.5em;
    font-size: var(--text-xs);
}
.ab-single__sidebar-cta {
    background: var(--color-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}
.ab-single__sidebar-cta-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

/* ═══════════ INLINE CTA (50%) ═══════════ */
.blog-cta {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--space-3xl) var(--space-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    margin: var(--space-3xl) 0;
}
.blog-cta--bottom {
    margin: 0;
}
.blog-cta__bubbles {
    position: absolute; inset: 0; pointer-events: none;
}
.blog-cta__bubble {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.15), rgba(255,255,255,0.03));
    border: 1px solid rgba(255,255,255,0.1);
}
.blog-cta__bubble--1 { width: 5rem; height: 5rem; top: -1rem; left: 8%; }
.blog-cta__bubble--2 { width: 3rem; height: 3rem; top: 20%; right: 10%; }
.blog-cta__bubble--3 { width: 4rem; height: 4rem; bottom: -0.5rem; left: 22%; }
.blog-cta__bubble--4 { width: 2rem; height: 2rem; bottom: 18%; right: 5%; }
.blog-cta__title {
    position: relative;
    font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
    font-weight: var(--weight-bold);
    color: var(--color-white);
    margin-bottom: var(--space-md);
    line-height: var(--leading-tight);
}
.blog-cta__text {
    position: relative;
    color: rgba(255,255,255,0.8);
    font-size: var(--text-lg);
    max-width: 36ch;
    margin-inline: auto;
    margin-bottom: var(--space-xl);
    line-height: var(--leading-normal);
}
.blog-cta__actions {
    position: relative;
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* ═══════════ SHARE ═══════════ */
.ab-single__after {
    padding: var(--space-3xl) 0;
    border-top: 1px solid var(--color-border-light);
}
.ab-single__share {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}
.ab-single__share-label {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-light);
}
.ab-single__share-links {
    display: flex;
    gap: var(--space-sm);
}
.ab-single__share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background: var(--color-light);
    color: var(--color-text);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
}
.ab-single__share-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* ═══════════ BOTTOM CTA ═══════════ */
.ab-single__bottom-cta {
    padding-bottom: var(--space-4xl);
}

/* ═══════════ RELATED POSTS ═══════════ */
.ab-single__related {
    padding: var(--space-4xl) 0;
    background: var(--color-light);
}
.ab-single__related-title {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    margin-bottom: var(--space-2xl);
}
.ab-single__related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}
.ab-single__related-card {
    display: block;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    transition: box-shadow var(--duration-normal) var(--ease-out);
}
.ab-single__related-card:hover {
    box-shadow: var(--shadow-lg);
}
.ab-single__related-img {
    width: 100%;
    height: 12rem;
    object-fit: cover;
    display: block;
}
.ab-single__related-placeholder {
    width: 100%;
    height: 12rem;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-border-light) 60%, hsl(202 40% 88%) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    opacity: .45;
}
.ab-single__related-body {
    padding: var(--space-lg);
}
.ab-single__related-date {
    font-size: var(--text-xs);
    color: var(--color-text-light);
    display: block;
    margin-bottom: var(--space-xs);
}
.ab-single__related-heading {
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    color: var(--color-text);
    line-height: var(--leading-tight);
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 64rem) {
    .ab-single__grid {
        grid-template-columns: 1fr;
    }
    .ab-single__sidebar {
        display: none;
    }
    .ab-single__related-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 40rem) {
    .ab-single__hero {
        padding-top: calc(var(--header-height) + var(--space-2xl));
        padding-bottom: var(--space-2xl);
    }
    .ab-single__cover-img {
        border-radius: var(--radius-md);
        max-height: 18rem;
    }
    .ab-single__related-grid {
        grid-template-columns: 1fr;
    }
    .ab-single__share {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    .blog-cta {
        padding: var(--space-2xl) var(--space-lg);
    }
}