/* ============================================================
   BLOG – Archive & Single Post Styles
   AlpenPeptides Design System
   ============================================================ */

/* ----------------------------------------
   Blog Hero (shared between archive & single)
   ---------------------------------------- */
.blog-hero {
    background: var(--color-navy);
    padding: clamp(3rem, 6vw, 5rem) var(--container-pad);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.blog-hero__eyebrow {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-3);
    display: block;
    position: relative;
    z-index: 1;
}

.blog-hero__title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-4) 0;
    position: relative;
    z-index: 1;
}

.blog-hero__subtitle {
    font-size: var(--text-base);
    color: var(--color-gray-300);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* ----------------------------------------
   Blog Archive Grid
   ---------------------------------------- */
.blog-archive {
    background: var(--color-offwhite);
    padding: clamp(2.5rem, 5vw, 4rem) var(--container-pad);
}

.blog-archive__grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .blog-archive__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 990px) {
    .blog-archive__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-8);
    }
}

.blog-archive__empty {
    text-align: center;
    color: var(--color-gray-600);
    font-size: var(--text-lg);
    padding: var(--space-16) 0;
}

/* ----------------------------------------
   Blog Card
   ---------------------------------------- */
.blog-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(20, 39, 63, 0.10);
    border-color: rgba(46, 92, 138, 0.25);
}

.blog-card:focus-within {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(20, 39, 63, 0.10);
}

/* Card Image / Gradient Placeholder */
.blog-card__image {
    aspect-ratio: 16 / 9;
    position: relative;
    overflow: hidden;
    background: var(--color-offwhite);
}

.blog-card:nth-child(4n+1) .blog-card__image {
    background: linear-gradient(135deg, #14273F 0%, #1F3A5F 50%, #2E5C8A 100%);
}

.blog-card:nth-child(4n+2) .blog-card__image {
    background: radial-gradient(ellipse at 30% 50%, #2E5C8A 0%, #1F3A5F 50%, #14273F 100%);
}

.blog-card:nth-child(4n+3) .blog-card__image {
    background: linear-gradient(to top right, #0D1F32 0%, #14273F 40%, #2E5C8A 100%);
}

.blog-card:nth-child(4n+4) .blog-card__image {
    background: linear-gradient(160deg, #1F3A5F 0%, #14273F 60%, #2E5C8A 100%);
}

/* Scientific dot-grid overlay (only on placeholder) */
.blog-card__image::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 16px 16px;
    z-index: 1;
}

/* Decorative circle (only on placeholder) */
.blog-card__image::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 60%;
    height: 80%;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    z-index: 1;
}

/* Hide overlays when real image is present */
.blog-card__image:has(img)::before,
.blog-card__image:has(img)::after {
    display: none;
}

.blog-card:hover .blog-card__image::before {
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
}

.blog-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    position: relative;
    z-index: 2;
    transform: scale(1.15);
}

/* Card Body */
.blog-card__body {
    padding: var(--space-5) var(--space-5) var(--space-6);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-card__category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: rgba(46, 92, 138, 0.08);
    border: 1px solid rgba(46, 92, 138, 0.15);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    line-height: 1;
    margin-bottom: var(--space-3);
    align-self: flex-start;
}

.blog-card__title {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin: 0 0 var(--space-3) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card__title a {
    color: inherit;
    text-decoration: none;
}

.blog-card:hover .blog-card__title a {
    color: var(--color-navy-mid);
}

.blog-card__excerpt {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    line-height: 1.65;
    margin: 0 0 var(--space-4) 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.blog-card__meta {
    font-size: 0.8rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.blog-card__meta-separator {
    display: inline-block;
    width: 3px;
    height: 3px;
    background: var(--color-gray-600);
    border-radius: 50%;
}

.blog-card__read-more {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-navy-mid);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color var(--transition), gap var(--transition);
}

.blog-card__read-more::after {
    content: '\2192';
    transition: transform var(--transition);
}

.blog-card__read-more:hover {
    color: var(--color-accent);
}

.blog-card__read-more:hover::after {
    transform: translateX(3px);
}

/* ----------------------------------------
   Pagination
   ---------------------------------------- */
.blog-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-10) 0 0;
    max-width: var(--max-width);
    margin: 0 auto;
}

.blog-pagination a,
.blog-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-navy);
    text-decoration: none;
    border: 1px solid var(--color-gray-300);
    transition: all var(--transition);
}

.blog-pagination a:hover {
    background: var(--color-navy);
    color: var(--color-white);
    border-color: var(--color-navy);
}

.blog-pagination .current {
    background: var(--color-navy-mid);
    color: var(--color-white);
    border-color: var(--color-navy-mid);
}

/* ----------------------------------------
   Mobile
   ---------------------------------------- */
@media (max-width: 639px) {
    .blog-card__body {
        padding: var(--space-4);
    }

    .blog-card__title {
        font-size: 1rem;
    }
}

/* ============================================================
   SINGLE POST
   ============================================================ */

/* Single Post Hero */
.single-post-hero {
    background: var(--color-navy);
    padding: clamp(3rem, 7vw, 6rem) var(--container-pad) clamp(2.5rem, 5vw, 4rem);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.single-post-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.single-post-hero__category {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 5px 14px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-5);
    position: relative;
    z-index: 1;
}

.single-post-hero__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.12;
    letter-spacing: -0.025em;
    max-width: 760px;
    margin: 0 auto var(--space-5);
    text-wrap: balance;
    position: relative;
    z-index: 1;
}

.single-post-hero__meta {
    font-size: var(--text-sm);
    color: var(--color-gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    position: relative;
    z-index: 1;
}

.single-post-hero__meta-separator {
    display: inline-block;
    width: 3px;
    height: 3px;
    background: var(--color-gray-600);
    border-radius: 50%;
}

/* Single Post Content */
.single-post-content {
    background: var(--color-white);
    max-width: var(--max-width-text);
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 3.5rem) var(--container-pad);
}

.single-post-content p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: #333330;
    margin-bottom: 1.5rem;
}

.single-post-content > p:first-of-type {
    font-size: 1.1875rem;
    line-height: 1.7;
    color: var(--color-navy);
}

.single-post-content a {
    color: var(--color-navy-mid);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: rgba(31, 58, 95, 0.3);
    transition: text-decoration-color var(--transition);
}

.single-post-content a:hover {
    text-decoration-color: var(--color-navy-mid);
}

.single-post-content strong,
.single-post-content b {
    font-weight: 700;
    color: var(--color-navy);
}

/* Headings in content */
.single-post-content h2,
.single-post-content h3,
.single-post-content h4,
.single-post-content h5 {
    font-family: var(--font-family);
    color: var(--color-navy);
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.single-post-content h2 {
    font-size: clamp(1.375rem, 2.5vw, 1.625rem);
    font-weight: 800;
    margin: 3rem 0 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-gray-300);
}

.single-post-content h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 1.5rem;
}

.single-post-content h3 {
    font-size: clamp(1.125rem, 2vw, 1.3125rem);
    font-weight: 700;
    margin: 2.25rem 0 0.75rem;
}

.single-post-content h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin: 1.75rem 0 0.5rem;
}

.single-post-content h5 {
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin: 1.75rem 0 0.5rem;
}

/* Lists */
.single-post-content ul,
.single-post-content ol {
    margin: 0 0 1.5rem 0;
    padding-left: 0;
}

.single-post-content li {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: #333330;
    margin-bottom: 0.5rem;
}

.single-post-content ul {
    list-style: none;
}

.single-post-content ul > li {
    position: relative;
    padding-left: 1.25rem;
}

.single-post-content ul > li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.single-post-content ol {
    list-style: none;
    counter-reset: post-counter;
}

.single-post-content ol > li {
    position: relative;
    padding-left: 2rem;
    counter-increment: post-counter;
}

.single-post-content ol > li::before {
    content: counter(post-counter) '.';
    position: absolute;
    left: 0;
    font-weight: 700;
    color: var(--color-navy-mid);
    font-size: 0.95rem;
}

/* Blockquote */
.single-post-content blockquote {
    margin: 2rem 0;
    padding: 1.5rem 1.5rem 1.5rem 1.75rem;
    background: var(--color-gray-100);
    border-left: 3px solid var(--color-navy-mid);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: normal;
}

.single-post-content blockquote p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-navy);
    margin-bottom: 0;
}

.single-post-content blockquote p + p {
    margin-top: 0.75rem;
}

/* HR */
.single-post-content hr {
    border: none;
    height: 1px;
    background: var(--color-gray-300);
    margin: 2.5rem 0;
}

/* Images */
.single-post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: 2rem 0;
}

.single-post-content figure {
    margin: 2rem 0;
}

.single-post-content figcaption {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    text-align: center;
    margin-top: var(--space-2);
}

/* ----------------------------------------
   Post Footer (back link)
   ---------------------------------------- */
.single-post-footer {
    max-width: var(--max-width-text);
    margin: 0 auto;
    padding: 0 var(--container-pad) var(--space-10);
    border-top: 1px solid var(--color-gray-300);
    padding-top: var(--space-6);
}

.single-post-footer__back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-navy-mid);
    text-decoration: none;
    transition: color var(--transition);
}

.single-post-footer__back::before {
    content: '\2190';
    transition: transform var(--transition);
}

.single-post-footer__back:hover {
    color: var(--color-accent);
}

.single-post-footer__back:hover::before {
    transform: translateX(-3px);
}

/* ----------------------------------------
   Related Posts
   ---------------------------------------- */
.related-posts {
    background: var(--color-offwhite);
    padding: clamp(2.5rem, 5vw, 4rem) var(--container-pad);
}

.related-posts__inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.related-posts__eyebrow {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-2);
    text-align: center;
}

.related-posts__heading {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 800;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: var(--space-8);
    letter-spacing: -0.02em;
}

.related-posts__grid {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .related-posts__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 990px) {
    .related-posts__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}