/* ==========================================================================
   Blog theme - premium light design system
   Used only by _LayoutBlog.cshtml (/blogs/ and /blog/{perma})
   ========================================================================== */

:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --faint: #94a3b8;
    --border: #e9edf5;
    --accent: #4f46e5;
    --accent-dark: #4338ca;
    --accent-soft: #eef2ff;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 14px rgba(15, 23, 42, .05);
    --shadow-md: 0 2px 6px rgba(15, 23, 42, .05), 0 18px 44px rgba(15, 23, 42, .10);
    --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--text);
    letter-spacing: -.02em;
    line-height: 1.25;
}

a { color: var(--accent); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; height: auto; }

.blog-shell { max-width: 1240px; }

/* ------------------------------------------------------------------ header */
.blog-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--border);
}

.blog-header .blog-nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 76px;
}

.blog-brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -.03em;
    color: var(--text);
}

.blog-brand:hover { color: var(--text); }

.blog-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    color: #fff;
    font-size: 1.05rem;
    box-shadow: 0 8px 20px rgba(79, 70, 229, .30);
}

.blog-brand-text small {
    display: block;
    font-family: var(--font-body);
    font-size: .72rem;
    font-weight: 500;
    letter-spacing: .01em;
    color: var(--faint);
    line-height: 1;
    margin-top: .18rem;
}

.blog-menu {
    display: flex;
    align-items: center;
    gap: .35rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.blog-menu a {
    display: inline-block;
    padding: .5rem 1.05rem;
    border-radius: 999px;
    font-size: .94rem;
    font-weight: 500;
    color: var(--muted);
}

.blog-menu a:hover { background: var(--accent-soft); color: var(--accent); }

.blog-menu a.is-active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

.blog-menu-toggle {
    display: none;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 1.1rem;
    align-items: center;
    justify-content: center;
}

/* -------------------------------------------------------------- page title */
.blog-hero {
    padding: 3.4rem 0 2.2rem;
}

.blog-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .35rem .85rem;
    margin-bottom: 1rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.blog-hero h1 {
    font-size: clamp(2rem, 4.2vw, 3rem);
    font-weight: 800;
    margin: 0 0 .7rem;
}

.blog-hero p {
    color: var(--muted);
    font-size: 1.06rem;
    max-width: 62ch;
    margin: 0;
}

.blog-crumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem;
    list-style: none;
    margin: 0 0 1.4rem;
    padding: 0;
    font-size: .88rem;
    color: var(--faint);
}

.blog-crumbs a { color: var(--muted); }
.blog-crumbs a:hover { color: var(--accent); }
.blog-crumbs .sep { color: var(--border); }
.blog-crumbs .current { color: var(--text); font-weight: 500; }

/* ------------------------------------------------------------------- cards */
.post-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #dbe2ef;
}

.post-card-media {
    position: relative;
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #eef2ff, #f5f3ff);
}

.post-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}

.post-card:hover .post-card-media img { transform: scale(1.05); }

.post-card-body {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    padding: 1.4rem 1.5rem 1.5rem;
}

.post-card-body h2,
.post-card-body h3 {
    font-size: 1.16rem;
    font-weight: 700;
    margin: 0 0 .65rem;
}

.post-card-body h2 a,
.post-card-body h3 a { color: var(--text); }
.post-card-body h2 a:hover,
.post-card-body h3 a:hover { color: var(--accent); }

.post-card-summary {
    color: var(--muted);
    font-size: .94rem;
    margin: 0 0 1.1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-footer { margin-top: auto; }

/* meta row */
.post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .35rem 1rem;
    margin: 0 0 .85rem;
    padding: 0;
    list-style: none;
    font-size: .82rem;
    color: var(--faint);
}

.post-meta li { display: inline-flex; align-items: center; gap: .4rem; }
.post-meta i { color: var(--accent); font-size: .82rem; }

.post-read-more {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    font-size: .9rem;
    font-weight: 600;
    color: var(--accent);
}

.post-read-more i { transition: transform .2s ease; }
.post-read-more:hover i { transform: translateX(3px); }

/* --------------------------------------------------------------- featured */
.post-featured {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 4px);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .22s ease, box-shadow .22s ease;
}

.post-featured:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.post-featured-media {
    position: relative;
    height: 100%;
    min-height: 320px;
    overflow: hidden;
    background: linear-gradient(135deg, #eef2ff, #f5f3ff);
}

.post-featured-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-featured-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    padding: 2.4rem 2.6rem;
}

.post-featured-body h2 {
    font-size: clamp(1.5rem, 2.4vw, 2.05rem);
    font-weight: 800;
    margin: 0 0 .9rem;
}

.post-featured-body h2 a { color: var(--text); }
.post-featured-body h2 a:hover { color: var(--accent); }

.post-featured-body p {
    color: var(--muted);
    margin: 0 0 1.3rem;
}

.badge-featured {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    align-self: flex-start;
    padding: .32rem .8rem;
    margin-bottom: 1rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
}

/* ----------------------------------------------------------------- article */
.article-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 2.6rem 2.8rem 2.9rem;
}

.article-title {
    font-size: clamp(1.7rem, 3.2vw, 2.35rem);
    font-weight: 800;
    margin: 0 0 1rem;
}

.article-hero {
    margin: 1.8rem 0 2.2rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: linear-gradient(135deg, #eef2ff, #f5f3ff);
}

.article-hero img { display: block; width: 100%; }

.blog-content { color: #1f2937; font-size: 1.05rem; }

.blog-content > *:first-child { margin-top: 0; }

.blog-content p { margin: 0 0 1.25rem; }

.blog-content h2 {
    font-size: 1.55rem;
    font-weight: 700;
    margin: 2.4rem 0 .9rem;
}

.blog-content h3 {
    font-size: 1.28rem;
    font-weight: 700;
    margin: 2rem 0 .75rem;
}

.blog-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 1.7rem 0 .6rem;
}

.blog-content ul,
.blog-content ol { margin: 0 0 1.25rem; padding-left: 1.4rem; }
.blog-content li { margin-bottom: .5rem; }

.blog-content img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1.8rem auto;
    border-radius: var(--radius-sm);
}

.blog-content a { font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }

.blog-content blockquote {
    margin: 1.8rem 0;
    padding: 1.1rem 1.4rem;
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--accent-soft);
    color: #3730a3;
    font-style: italic;
}

.blog-content blockquote p:last-child { margin-bottom: 0; }

.blog-content table {
    width: 100%;
    margin: 1.8rem 0;
    border-collapse: collapse;
    font-size: .95rem;
}

.blog-content th,
.blog-content td {
    padding: .7rem .9rem;
    border: 1px solid var(--border);
    text-align: left;
}

.blog-content th { background: #f8fafc; font-weight: 600; }

.blog-content pre {
    margin: 1.8rem 0;
    padding: 1.1rem 1.3rem;
    border-radius: var(--radius-sm);
    background: #0f172a;
    color: #e2e8f0;
    font-size: .88rem;
    overflow-x: auto;
}

.blog-content code {
    font-size: .9em;
    background: #f1f5f9;
    padding: .15rem .4rem;
    border-radius: 6px;
}

.blog-content pre code { background: none; padding: 0; }

.blog-content hr { margin: 2.4rem 0; border: 0; border-top: 1px solid var(--border); }

/* --------------------------------------------------- prev / next post nav */
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.post-nav-link {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    padding: 1rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fbfcfe;
    min-width: 0;
    transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.post-nav-link:not(.is-empty):hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    transform: translateY(-2px);
}

.post-nav-link.is-empty {
    border: 0;
    background: transparent;
}

.post-nav-next { text-align: right; }

.post-nav-label {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    font-size: .76rem;
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: var(--accent);
}

.post-nav-next .post-nav-label { justify-content: flex-end; }

.post-nav-title {
    font-family: var(--font-display);
    font-size: .95rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-nav-link:not(.is-empty):hover .post-nav-title { color: var(--accent-dark); }

/* ----------------------------------------------------------------- sidebar */
.sidebar-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 1.6rem;
    margin-bottom: 1.5rem;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: .55rem;
    font-family: var(--font-display);
    font-size: 1.02rem;
    font-weight: 700;
    margin: 0 0 1.1rem;
    padding-bottom: .9rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-title i { color: var(--accent); }

.recent-list { list-style: none; margin: 0; padding: 0; }

.recent-item + .recent-item {
    margin-top: .95rem;
    padding-top: .95rem;
    border-top: 1px solid var(--border);
}

.recent-item a {
    display: flex;
    gap: .85rem;
    align-items: flex-start;
    color: var(--text);
}

.recent-thumb {
    flex: 0 0 68px;
    width: 68px;
    height: 68px;
    border-radius: 12px;
    overflow: hidden;
    background: linear-gradient(135deg, #eef2ff, #f5f3ff);
}

.recent-thumb img { width: 100%; height: 100%; object-fit: cover; }

.recent-thumb-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    color: var(--accent);
    font-size: 1.15rem;
}

.recent-body { min-width: 0; }

.recent-title {
    display: block;
    font-size: .89rem;
    font-weight: 600;
    line-height: 1.45;
    margin-bottom: .3rem;
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recent-item a:hover .recent-title { color: var(--accent); }

.recent-date { font-size: .76rem; color: var(--faint); }

.sidebar-sticky { position: sticky; top: 100px; }

.sidebar-cta {
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    border: 0;
    color: #fff;
}

.sidebar-cta .sidebar-title { color: #fff; border-color: rgba(255, 255, 255, .25); }
.sidebar-cta .sidebar-title i { color: #fff; }
.sidebar-cta p { color: rgba(255, 255, 255, .86); font-size: .9rem; margin: 0 0 1rem; }

.sidebar-cta .btn-cta {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .55rem 1.05rem;
    border-radius: 999px;
    background: #fff;
    color: var(--accent);
    font-size: .87rem;
    font-weight: 600;
}

.sidebar-cta .btn-cta:hover { background: #f1f5f9; color: var(--accent-dark); }

/* -------------------------------------------------------------- pagination */
.blog-pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .4rem;
    margin: 2.8rem 0 0;
    padding: 0;
    list-style: none;
}

.blog-pagination .page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 .75rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--muted);
    font-size: .92rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.blog-pagination a.page-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.blog-pagination .is-active .page-link {
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    border-color: transparent;
    color: #fff;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(79, 70, 229, .28);
}

.blog-pagination .is-disabled .page-link {
    color: #cbd5e1;
    background: #f8fafc;
    box-shadow: none;
    cursor: not-allowed;
}

.blog-pagination .is-dots .page-link {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
    cursor: default;
}

/* ------------------------------------------------------------------ footer */
.blog-footer {
    margin-top: 4.5rem;
    background: #0f172a;
    color: #cbd5e1;
    padding: 3.2rem 0 1.6rem;
}

.blog-footer h6 {
    color: #fff;
    font-family: var(--font-display);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    margin: 0 0 1rem;
}

.blog-footer .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: .9rem;
}

.blog-footer .footer-brand:hover { color: #fff; }

.blog-footer p { font-size: .9rem; color: #94a3b8; margin: 0 0 1rem; }

.blog-footer ul { list-style: none; margin: 0; padding: 0; }
.blog-footer ul li { margin-bottom: .55rem; }

.blog-footer ul a { color: #cbd5e1; font-size: .92rem; }
.blog-footer ul a:hover { color: #fff; }
.blog-footer ul a i { color: var(--accent); margin-right: .5rem; font-size: .8rem; }

.blog-footer-bottom {
    margin-top: 2.2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, .1);
    font-size: .84rem;
    color: #94a3b8;
}

.blog-footer-bottom a { color: #cbd5e1; }

/* ------------------------------------------------------------- responsive */
@media (max-width: 991.98px) {
    .blog-hero { padding: 2.4rem 0 1.6rem; }
    .article-card { padding: 1.8rem 1.6rem 2rem; }
    .post-featured-body { padding: 1.8rem 1.7rem; }
    .post-featured-media { min-height: 240px; }
    .sidebar-sticky { position: static; }
}

@media (max-width: 767.98px) {
    body { font-size: 15.5px; }
    .blog-menu-toggle { display: inline-flex; }
    .blog-menu {
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: .6rem .9rem 1rem;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        display: none;
    }
    .blog-menu.is-open { display: flex; }
    .blog-menu a { display: block; padding: .7rem 1rem; border-radius: 12px; }
    .article-card { padding: 1.4rem 1.15rem 1.6rem; }
    .blog-content { font-size: 1rem; }
    .post-featured-media { min-height: 200px; }
}

@media (max-width: 575.98px) {
    .blog-hero { padding: 1.8rem 0 1.2rem; }
    .blog-brand { font-size: 1.1rem; }
    .blog-brand-mark { width: 38px; height: 38px; border-radius: 11px; }
    .blog-pagination .page-link { min-width: 40px; height: 40px; }
    .recent-thumb { flex-basis: 58px; width: 58px; height: 58px; }
    .post-nav { grid-template-columns: 1fr; }
    .post-nav-link.is-empty { display: none; }
    .post-nav-next { text-align: left; }
    .post-nav-next .post-nav-label { justify-content: flex-start; }
}