/* =========================================================
   Blog Platform base styles
   Structural CSS only. Theme values live in separate files:
   wwwroot/css/themes/blog-theme-*.css
   ========================================================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-gutter: stable;
}

@supports not (scrollbar-gutter: stable) {
    body {
        overflow-y: scroll;
    }
}

html, body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: radial-gradient(circle at top left, var(--body-bg-radial), transparent var(--body-bg-radial-stop)), linear-gradient(180deg, var(--body-bg-gradient-start), var(--body-bg-gradient-end));
    color: var(--text-main);
    font-size: 16px;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
}

*:focus:not(:focus-visible) {
    outline: none;
}

.site-shell {
    min-height: 100vh;
    padding: 18px 0 36px;
}

.container-xl {
    width: min(var(--shell-width), calc(100% - 36px));
    margin: 0 auto;
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-height: 72px;
    padding: 14px 20px;
    margin-bottom: 18px;
    border-radius: 22px;
    background: var(--top-nav-bg);
    border: 1px solid var(--top-nav-border);
    backdrop-filter: blur(12px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-main);
}

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-weight: 800;
    color: var(--brand-icon-text);
    background: linear-gradient(135deg, var(--brand-icon-bg-start), var(--brand-icon-bg-end));
}

.brand strong {
    display: block;
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.1;
}

.brand small {
    display: block;
    margin-top: 3px;
    color: var(--text-muted);
    font-size: .78rem;
}

.main-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

    .main-menu a {
        padding: 10px 13px;
        border-radius: 999px;
        color: var(--menu-link-text);
        font-size: .9rem;
        font-weight: 600;
        border: 1px solid transparent;
        transition: .18s ease;
    }

        .main-menu a:hover,
        .main-menu a.active {
            color: var(--menu-link-active-text);
            background: var(--menu-link-active-bg);
            border-color: var(--menu-link-active-border);
        }

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 28px;
    padding: 38px;
    border-radius: 30px 30px 0 0;
    background: linear-gradient(120deg, var(--hero-bg-start) 0%, var(--hero-bg-middle) 58%, var(--hero-bg-end) 100%);
    border: 1px solid var(--hero-border);
    box-shadow: var(--shadow-soft);
}

.about-hero {
    border-radius: 30px;
}

.hero-main {
    max-width: 820px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--hero-eyebrow-text);
    background: var(--hero-eyebrow-bg);
    border: 1px solid var(--hero-eyebrow-border);
    font-size: .86rem;
    font-weight: 700;
}

    .eyebrow span {
        width: 8px;
        height: 8px;
        border-radius: 999px;
        background: var(--accent);
    }

.hero h1 {
    margin: 22px 0 0;
    color: var(--hero-title-text);
    font-size: clamp(2.8rem, 6vw, 4.8rem);
    line-height: .96;
    letter-spacing: -.055em;
    font-weight: 800;
    outline: none;
}

    .hero h1 span {
        display: block;
        margin-top: 8px;
        color: transparent;
        background: linear-gradient(90deg, var(--hero-title-gradient-start), var(--hero-title-gradient-middle), var(--hero-title-gradient-end));
        -webkit-background-clip: text;
        background-clip: text;
        outline: none;
    }

.hero p {
    max-width: 760px;
    margin: 24px 0 0;
    color: var(--hero-text);
    font-size: 1.04rem;
    line-height: 1.75;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 26px;
}

    .hero-tags span,
    .post-tech span,
    .tag-row span {
        display: inline-flex;
        align-items: center;
        min-height: 30px;
        padding: 6px 11px;
        border-radius: 999px;
        color: var(--tag-text-on-dark);
        background: var(--tag-bg-on-dark);
        border: 1px solid var(--tag-border-on-dark);
        font-size: .82rem;
        font-weight: 700;
    }

.hero-side {
    display: grid;
    gap: 14px;
    align-content: start;
}

.signal-card {
    padding: 18px;
    border-radius: 18px;
    color: var(--signal-card-title);
    background: var(--signal-card-bg);
    border: 1px solid var(--signal-card-border);
}

    .signal-card small {
        display: block;
        margin-bottom: 8px;
        color: var(--signal-card-muted);
        font-weight: 700;
    }

    .signal-card strong {
        display: block;
        line-height: 1.35;
    }

.author-visual-card {
    display: grid;
    gap: 14px;
    padding: 16px;
    border-radius: 20px;
    color: var(--signal-card-title);
    background: var(--signal-card-bg);
    border: 1px solid var(--signal-card-border);
    overflow: hidden;
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

    .author-visual-card:hover {
        transform: translateY(-3px);
        border-color: var(--accent);
        box-shadow: 0 18px 42px rgba(0, 0, 0, .22);
    }

.author-visual-image {
    height: 132px;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, .92);
}

    .author-visual-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center 48%;
        display: block;
        filter: grayscale(1) contrast(1.08);
        opacity: .9;
        transition: transform .35s ease, opacity .22s ease;
    }

.author-visual-card:hover .author-visual-image img {
    transform: scale(1.035);
    opacity: 1;
}

.author-visual-text small {
    display: block;
    margin-bottom: 7px;
    color: var(--signal-card-muted);
    font-weight: 700;
}

.author-visual-text strong {
    display: block;
    line-height: 1.35;
    font-size: .96rem;
}

@media (max-width: 980px) {
    .author-visual-card {
        grid-template-columns: 150px 1fr;
        align-items: center;
    }

    .author-visual-image {
        height: 96px;
    }
}

@media (max-width: 620px) {
    .author-visual-card {
        grid-template-columns: 1fr;
    }

    .author-visual-image {
        height: 120px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .author-visual-card,
    .author-visual-image img {
        transition: none;
    }

        .author-visual-card:hover,
        .author-visual-card:hover .author-visual-image img {
            transform: none;
        }
}

.intro-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 24px 38px;
    color: var(--text-main);
    background: var(--intro-strip-bg);
    border-left: 1px solid var(--intro-strip-border);
    border-right: 1px solid var(--intro-strip-border);
}

    .intro-strip h2 {
        margin: 0 0 10px;
        font-size: 1.1rem;
        color: var(--intro-strip-title);
    }

    .intro-strip p,
    .intro-strip li {
        color: var(--text-soft);
        line-height: 1.7;
    }

    .intro-strip ul {
        margin: 0;
        padding-left: 19px;
    }

.inline-link {
    display: inline-flex;
    margin-top: 6px;
    color: var(--primary);
    font-weight: 800;
}

.content-frame {
    align-items: flex-start;
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: stretch;
    overflow: hidden;
    border-radius: 0 0 30px 30px;
    border: 1px solid var(--content-frame-border);
    border-top: 0;
    background: var(--content-frame-bg);
    box-shadow: var(--shadow-soft);
    padding-top: 32px;
}

.sidebar {
    margin-top: 0;
    padding-top: 0;
    min-width: 0;
    background: var(--sidebar-bg);
    color: var(--text-main);
}

.sidebar-inner {
    position: sticky;
    top: 0;
    padding: 0 24px 34px;
}

.sidebar h4 {
    margin: 0 0 8px;
    color: var(--sidebar-title);
    font-size: 1rem;
}

.sidebar p {
    margin: 0 0 18px;
    color: var(--sidebar-text);
    line-height: 1.55;
}

.zone-pill {
    display: grid;
    grid-template-columns: 22px 1fr auto;
    gap: 12px;
    align-items: center;
    min-height: 58px;
    padding: 12px 14px;
    margin-bottom: 12px;
    border-radius: 16px;
    color: var(--zone-pill-text);
    background: var(--zone-pill-bg);
    border: 1px solid var(--zone-pill-border);
    transition: .18s ease;
}

    .zone-pill:hover,
    .zone-pill.active {
        background: var(--zone-pill-active-bg);
        border-color: var(--zone-pill-active-border);
    }

.zone-icon {
    width: 18px;
    height: 18px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
}

.zone-pill strong {
    font-size: .92rem;
    line-height: 1.1;
}

.zone-pill em {
    min-width: 32px;
    padding: 7px 9px;
    border-radius: 999px;
    text-align: center;
    color: var(--zone-count-text);
    background: var(--zone-count-bg);
    font-style: normal;
    font-weight: 800;
    font-size: .82rem;
}

.author-card {
    margin-top: 28px;
    padding: 20px;
    border-radius: 18px;
    background: linear-gradient(180deg, var(--author-card-bg-start), var(--author-card-bg-end));
    border: 1px solid var(--author-card-border);
}

    .author-card small {
        color: var(--author-card-small);
    }

    .author-card h5 {
        margin: 12px 0 10px;
        color: var(--author-card-title);
        font-size: 1.55rem;
    }

.posts-area {
    min-width: 0;
    padding: 36px 40px 42px;
    color: var(--text-dark);
    background: var(--posts-area-bg);
    border-radius: 16px;
}

.section-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 26px;
}

.section-kicker {
    margin-bottom: 10px;
    color: var(--section-kicker-text);
    font-size: .8rem;
    font-weight: 800;
    letter-spacing: .28em;
}

.section-header h2,
.about-content h2 {
    margin: 0;
    color: var(--text-dark);
    font-size: clamp(2rem, 4vw, 2.75rem);
    line-height: 1;
    letter-spacing: -.04em;
}

.section-header p,
.about-content p,
.about-content li {
    color: var(--text-dark-soft);
    line-height: 1.75;
}

.section-header a,
.browse-button {
    color: var(--browse-link-text);
    font-weight: 700;
}

.post-grid {
    display: grid;
    gap: 16px;
}

.post-card {
    background: var(--post-card-bg);
    color: var(--post-card-text);
    padding: 20px;
    border-radius: 18px;
    border: 1px solid var(--post-card-border);
    box-shadow: var(--shadow-card);
    transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

    .post-card:hover {
        transform: translateY(-3px);
        border-color: rgba(85, 199, 255, .70);
        box-shadow: inset 0 1px 0 rgba(255, 255, 255, .10), 0 0 0 3px rgba(85, 182, 255, .14), 0 14px 32px rgba(0, 0, 0, .24);
    }

    .post-card:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 3px;
    }

.post-card-top {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 999px;
    color: var(--badge-text);
    background: var(--badge-bg);
    border: 1px solid var(--badge-border);
    font-size: .72rem;
    font-weight: 800;
}

.badge-primary {
    color: var(--badge-primary-text);
    background: var(--badge-primary-bg);
    border-color: var(--badge-primary-border);
}

.post-title {
    margin: 0 0 10px;
    color: var(--post-title-text);
    font-size: clamp(1.2rem, 1.9vw, 1.55rem);
    line-height: 1.15;
    letter-spacing: -.035em;
}

    .post-title a:hover {
        color: var(--post-title-hover);
    }

.post-summary {
    max-width: 820px;
    margin: 0 0 14px;
    color: var(--post-summary-text);
    line-height: 1.65;
}

.post-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

    .post-tech span,
    .tag-row span {
        color: var(--post-tech-text);
        background: var(--post-tech-bg);
        border-color: var(--post-tech-border);
    }

.post-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--post-footer-border);
    color: var(--post-footer-text);
    font-size: .9rem;
    font-weight: 700;
}

.read-btn {
    color: var(--read-button-text);
    font-weight: 800;
}

.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid var(--border-light);
    color: var(--pagination-text);
    font-weight: 700;
}

.pagination-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
}

    .pagination-buttons button {
        min-width: 42px;
        height: 42px;
        padding: 0 14px;
        border: 1px solid var(--pagination-button-border);
        border-radius: 12px;
        color: var(--pagination-button-text);
        background: var(--pagination-button-bg);
        font-weight: 800;
    }

        .pagination-buttons button.active {
            color: var(--pagination-button-active-text);
            background: var(--pagination-button-active-bg);
            border-color: var(--pagination-button-active-border);
            box-shadow: var(--pagination-button-active-shadow);
        }

        .pagination-buttons button:disabled {
            color: var(--pagination-button-disabled-text);
            background: var(--pagination-button-disabled-bg);
        }

.about-content {
    min-height: 470px;
}

    .about-content h3 {
        margin-top: 28px;
        color: var(--text-dark);
        font-size: 1.35rem;
    }

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 24px 0 28px;
}

.project-card {
    padding: 20px;
    border-radius: 18px;
    background: var(--surface-white);
    border: 1px solid var(--post-card-border);
    box-shadow: var(--shadow-card);
}

    .project-card h3 {
        margin: 0 0 8px;
    }

    .project-card p {
        margin: 0;
    }

.article-shell {
    padding: 34px 0 0;
}

.article-top {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    margin-bottom: 18px;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--article-breadcrumb-text);
    font-size: .92rem;
}

    .breadcrumbs a {
        color: var(--article-breadcrumb-link);
    }

    .breadcrumbs strong {
        color: var(--article-breadcrumb-current);
    }

.article-card {
    padding: 42px;
    border-radius: 28px;
    color: var(--text-dark);
    background: var(--surface-white);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-soft);
}

    .article-card h1 {
        max-width: 920px;
        margin: 18px 0 16px;
        color: var(--text-dark);
        font-size: clamp(1.7rem, 3.3vw, 2.8rem);
        line-height: 1.08;
        letter-spacing: -.03em;
    }

    .article-card h2 {
        margin-top: 34px;
        color: var(--text-dark);
        font-size: 1.65rem;
    }

    .article-card p,
    .article-card li {
        max-width: 860px;
        color: var(--text-dark-soft);
        line-height: 1.8;
    }

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--article-post-muted);
    font-size: .92rem;
}

.article-summary {
    margin-top: 26px;
    padding: 18px 20px;
    border-radius: 18px;
    color: var(--article-summary-text);
    background: var(--article-summary-bg);
    border: 1px solid var(--article-summary-border);
    line-height: 1.7;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

@media (max-width: 980px) {
    .top-nav,
    .section-header,
    .pagination-bar,
    .article-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero,
    .intro-strip,
    .content-frame,
    .project-grid {
        grid-template-columns: 1fr;
    }

    .hero-side {
        margin-top: 0;
    }

    .sidebar-inner {
        position: static;
    }
}

@media (max-width: 620px) {
    .container-xl {
        width: min(100% - 20px, var(--shell-width));
    }

    .hero,
    .intro-strip,
    .posts-area,
    .article-card {
        padding: 24px;
    }

        .hero h1 {
            font-size: 2.45rem;
        }
}

#blazor-error-ui {
    display: none;
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    padding: 0.75rem 1.25rem;
    color: #ffffff;
    background: #b32121;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.25);
}

    #blazor-error-ui .reload {
        margin-left: 0.75rem;
        color: #ffffff;
        font-weight: 700;
        text-decoration: underline;
    }

    #blazor-error-ui .dismiss {
        float: right;
        cursor: pointer;
    }

.loading-screen {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background: radial-gradient(circle at 20% 20%, rgba(86, 212, 255, .22), transparent 28%), radial-gradient(circle at 80% 30%, rgba(78, 161, 255, .18), transparent 26%), linear-gradient(180deg, #020817, #07111f);
    overflow: hidden;
}

.loading-card {
    position: relative;
    width: min(420px, 100%);
    padding: 42px 32px;
    text-align: center;
    border-radius: 30px;
    background: rgba(13, 23, 40, .78);
    border: 1px solid rgba(255, 255, 255, .1);
    box-shadow: 0 24px 70px rgba(0, 0, 0, .35);
    backdrop-filter: blur(14px);
}

.loading-logo {
    width: 68px;
    height: 68px;
    margin: 0 auto 28px;
    display: grid;
    place-items: center;
    border-radius: 22px;
    color: #06111f;
    font-weight: 900;
    font-size: 1.3rem;
    background: linear-gradient(135deg, #56d4ff, #9db7ff);
    box-shadow: 0 0 36px rgba(86, 212, 255, .35);
    animation: floatLogo 2.4s ease-in-out infinite;
}

.loading-card h1 {
    margin: 0;
    color: #ffffff;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -.035em;
}

.loading-card p {
    margin: 12px auto 0;
    max-width: 340px;
    color: #bfd0e7;
    font-size: 1.02rem;
    line-height: 1.55;
}

.loading-status {
    margin-top: 18px;
    color: rgba(191, 208, 231, .72);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.loading-orbits {
    position: absolute;
    inset: 22px;
    pointer-events: none;
}

    .loading-orbits span {
        position: absolute;
        border-radius: 999px;
        border: 1px solid rgba(86, 212, 255, .2);
        animation: orbitPulse 2.8s ease-in-out infinite;
    }

        .loading-orbits span:nth-child(1) {
            inset: 10px;
        }

        .loading-orbits span:nth-child(2) {
            inset: 28px;
            animation-delay: .35s;
        }

        .loading-orbits span:nth-child(3) {
            inset: 46px;
            animation-delay: .7s;
        }

.loading-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 26px;
}

    .loading-dots span {
        width: 10px;
        height: 10px;
        border-radius: 999px;
        background: #56d4ff;
        animation: loadingBounce 1.2s ease-in-out infinite;
    }

        .loading-dots span:nth-child(2) {
            animation-delay: .15s;
        }

        .loading-dots span:nth-child(3) {
            animation-delay: .3s;
        }

@keyframes floatLogo {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes orbitPulse {
    0%, 100% {
        opacity: .25;
        transform: scale(.96);
    }

    50% {
        opacity: .8;
        transform: scale(1.02);
    }
}

@keyframes loadingBounce {
    0%, 80%, 100% {
        transform: translateY(0);
        opacity: .45;
    }

    40% {
        transform: translateY(-9px);
        opacity: 1;
    }
}

#blazor-error-ui {
    display: none;
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    padding: 0.75rem 1.25rem;
    color: #ffffff;
    background: #b32121;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.25);
}

    #blazor-error-ui .reload {
        margin-left: 0.75rem;
        color: #ffffff;
        font-weight: 700;
        text-decoration: underline;
    }

    #blazor-error-ui .dismiss {
        float: right;
        cursor: pointer;
    }

.article-body {
    margin-top: 34px;
}

    .article-body h2,
    .article-body h3,
    .article-body h4 {
        margin: 34px 0 14px;
        color: var(--text-dark);
        letter-spacing: -.025em;
    }

    .article-body p {
        margin: 0 0 18px;
        color: var(--text-dark-soft);
        line-height: 1.8;
    }

.code-block,
.diagram-block {
    margin: 28px 0;
    overflow: hidden;
    border: 1px solid var(--border-light);
    border-radius: 18px;
    background: #07111f;
    box-shadow: var(--shadow-card);
}

    .code-block figcaption,
    .diagram-block figcaption {
        padding: 12px 16px;
        color: #dbeafe;
        background: #0d1728;
        border-bottom: 1px solid var(--diagram-header-border);
        font-size: .85rem;
        font-weight: 800;
    }

    .code-block pre,
    .diagram-block pre {
        margin: 0;
        padding: 18px;
        overflow-x: auto;
        color: #e6edf7;
        font-size: .92rem;
        line-height: 1.65;
    }

.mermaid-block {
    background: #0d1728;
}

    .mermaid-block .mermaid {
        display: flex;
        justify-content: center;
        padding: 24px;
        background: #0d1728;
    }

.plantuml-block {
    background: var(--surface-white);
}

    .plantuml-block img {
        display: block;
        max-width: 100%;
        margin: 0 auto;
        padding: 24px;
    }

    .plantuml-block details {
        padding: 0 18px 18px;
        color: var(--text-dark);
    }

.callout {
    margin: 28px 0;
    padding: 18px 20px;
    border-radius: 18px;
    border: 1px solid #bae6fd;
    background: #effaff;
    color: var(--callout-text);
}

    .callout strong {
        display: block;
        margin-bottom: 8px;
        text-transform: uppercase;
        font-size: .78rem;
        letter-spacing: .08em;
    }

    .callout p {
        margin: 0;
        color: var(--callout-text);
    }

.article-body {
    margin-top: 34px;
}

    .article-body h2,
    .article-body h3,
    .article-body h4 {
        margin: 34px 0 14px;
        color: var(--text-dark);
        letter-spacing: -.025em;
    }

    .article-body p {
        margin: 0 0 18px;
        color: var(--text-dark-soft);
        line-height: 1.8;
    }

.code-block,
.diagram-block {
    margin: 28px 0;
    overflow: hidden;
    border: 1px solid var(--border-light);
    border-radius: 18px;
    background: #07111f;
    box-shadow: var(--shadow-card);
}

    .code-block figcaption,
    .diagram-block figcaption {
        padding: 12px 16px;
        color: #dbeafe;
        background: #0d1728;
        border-bottom: 1px solid var(--diagram-header-border);
        font-size: .85rem;
        font-weight: 800;
    }

    .code-block pre,
    .diagram-block pre {
        margin: 0;
        padding: 18px;
        overflow-x: auto;
        color: #e6edf7;
        font-size: .92rem;
        line-height: 1.65;
    }

.mermaid-block {
    background: #0d1728;
}

    .mermaid-block .mermaid {
        display: flex;
        justify-content: center;
        padding: 24px;
        background: #0d1728;
    }

.plantuml-block {
    background: var(--surface-white);
}

    .plantuml-block img {
        display: block;
        max-width: 100%;
        margin: 0 auto;
        padding: 24px;
    }

    .plantuml-block details {
        padding: 0 18px 18px;
        color: var(--text-dark);
    }

.callout {
    margin: 28px 0;
    padding: 18px 20px;
    border-radius: 18px;
    border: 1px solid #bae6fd;
    background: #effaff;
    color: var(--callout-text);
}

    .callout strong {
        display: block;
        margin-bottom: 8px;
        text-transform: uppercase;
        font-size: .78rem;
        letter-spacing: .08em;
    }

    .callout p {
        margin: 0;
        color: var(--callout-text);
    }

.article-shell {
    padding: 34px 0 46px;
}

.article-card {
    padding: clamp(28px, 4vw, 48px);
    border-radius: 30px;
    color: var(--article-post-title);
    background: var(--article-card-bg);
    border: 1px solid var(--article-post-border);
    box-shadow: var(--article-card-shadow);
}

    .article-card h1 {
        color: var(--article-post-title);
    }

    .article-card p,
    .article-card li,
    .article-body p {
        color: var(--article-post-text);
    }

.article-meta {
    color: var(--article-post-muted);
}

.article-summary {
    color: var(--article-summary-text);
    background: var(--article-summary-bg);
    border-color: var(--article-summary-border);
    box-shadow: var(--article-summary-shadow);
}

.article-body .article-summary-block {
    width: 100%;
    max-width: none;
    margin: 0 0 34px;
    box-sizing: border-box;
}

.code-block,
.diagram-block {
    margin: 30px 0;
    overflow: hidden;
    border: 1px solid var(--diagram-border);
    border-radius: 20px;
    box-shadow: var(--diagram-panel-shadow);
}

    .snippet-toolbar,
    .code-block > figcaption,
    .diagram-block > figcaption {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        min-height: 46px;
        padding: 10px 14px;
        color: var(--diagram-header-text);
        background: var(--diagram-header-bg);
        border-bottom: 1px solid var(--diagram-header-border);
        font-size: .85rem;
        font-weight: 800;
    }

        .snippet-toolbar figcaption {
            padding: 0;
            border: 0;
            background: transparent;
        }

.snippet-toolbar-nested {
    margin-top: 16px;
    border-radius: 14px 14px 0 0;
}

.copy-button {
    padding: 7px 11px;
    border-radius: 999px;
    color: var(--code-copy-text);
    background: var(--code-copy-bg);
    border: 1px solid var(--code-copy-border);
    cursor: pointer;
    font-size: .78rem;
    font-weight: 800;
    transition: background .16s ease, transform .16s ease, border-color .16s ease;
}

    .copy-button:hover {
        background: var(--code-copy-bg-hover);
        transform: translateY(-1px);
    }

.code-block {
    background: var(--code-bg);
}

    .code-block pre,
    .plantuml-block details pre {
        margin: 0;
        padding: 0;
        overflow-x: auto;
        color: var(--code-text);
        background: var(--code-bg);
        font-size: .92rem;
        line-height: 1.65;
    }

    .code-block code,
    .plantuml-block details code {
        display: table;
        min-width: 100%;
        padding: 14px 0;
        font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
    }

.code-line {
    display: table-row;
}

.line-number,
.line-content {
    display: table-cell;
    white-space: pre;
}

.line-number {
    width: 1%;
    padding: 0 14px;
    color: var(--code-line-number);
    border-right: 1px solid var(--code-line-number-border);
    text-align: right;
    user-select: none;
}

.line-content {
    padding: 0 18px;
}

.plantuml-block {
    background: var(--diagram-plantuml-bg);
}

    .plantuml-block img {
        display: block;
        max-width: 100%;
        margin: 0 auto;
        padding: clamp(28px, 5vw, 52px);
        background: var(--diagram-plantuml-bg);
    }

.diagram-block-without-title {
    border-radius: 20px;
}

    .diagram-block-without-title > pre,
    .diagram-block-without-title > img {
        border-radius: 20px;
    }

    .plantuml-block details {
        padding: 0 18px 18px;
        color: var(--article-post-title);
        background: var(--diagram-plantuml-bg);
    }

    .plantuml-block summary,
    .plantuml-block .plantuml-source-summary {
        padding: 16px 0 0;
        cursor: pointer;
        color: var(--diagram-plantuml-node-text);
        font-family: var(--diagram-plantuml-font-family);
        font-weight: 800;
    }

.mermaid-block {
    background: var(--diagram-mermaid-bg);
}

    .mermaid-block .mermaid {
        display: flex;
        justify-content: center;
        min-height: 360px;
        padding: clamp(28px, 5vw, 56px);
        background: var(--mermaid-canvas-bg);
    }

    .mermaid-block svg {
        max-width: 100%;
        height: auto;
    }

    .mermaid-block .node rect,
    .mermaid-block .node polygon,
    .mermaid-block .node circle,
    .mermaid-block .node ellipse {
        fill: var(--diagram-mermaid-node-bg) !important;
        stroke: var(--diagram-mermaid-node-border) !important;
        stroke-width: 1.5px !important;
    }

    .mermaid-block .nodeLabel,
    .mermaid-block .label,
    .mermaid-block text,
    .mermaid-block foreignObject,
    .mermaid-block foreignObject *,
    .mermaid-block .labelBkg,
    .mermaid-block .edgeLabel,
    .mermaid-block .edgeLabel *,
    .mermaid-block .cluster-label,
    .mermaid-block .cluster-label * {
        color: var(--diagram-mermaid-node-text) !important;
        fill: var(--diagram-mermaid-node-text) !important;
    }

    .mermaid-block .edgePath .path,
    .mermaid-block .flowchart-link {
        stroke: var(--diagram-mermaid-line) !important;
    }

.callout {
    border-color: var(--callout-border);
    background: var(--callout-bg);
    box-shadow: var(--callout-shadow);
}


.theme-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 8px;
}

    .theme-selector label {
        color: var(--text-muted);
        font-size: .78rem;
        font-weight: 700;
    }

    .theme-selector select {
        min-height: 40px;
        padding: 8px 34px 8px 12px;
        border-radius: 999px;
        color: var(--text-main);
        background: rgba(78, 161, 255, .12);
        border: 1px solid rgba(78, 161, 255, .28);
        font-size: .86rem;
        font-weight: 700;
    }

        .theme-selector select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

@media (max-width: 980px) {
    .theme-selector {
        margin-left: 0;
    }
}

.article-preview-debug {
    position: sticky;
    top: 0;
    z-index: 9999;
    margin-bottom: 16px;
    padding: 10px 14px;
    border: 1px solid #2563eb;
    border-radius: 10px;
    background: #dbeafe;
    color: #1e3a8a;
    font-family: Consolas, monospace;
    font-size: 13px;
}

.top-nav-sticky-sentinel {
    height: 1px;
}

.top-nav-sticky {
    position: sticky;
    top: 0;
    z-index: 20;
    background-color: #081a33;
    opacity: 1;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: border-radius .18s ease, box-shadow .18s ease;
}

html:not(.top-nav-is-stuck) .top-nav-sticky {
    border-radius: 22px;
}

html.top-nav-is-stuck .top-nav-sticky {
    border-radius: 0 0 22px 22px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, .28);
}

.diagram-render-error {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(220, 38, 38, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: #fca5a5;
    font-size: 0.9rem;
}


.code-block-title-hidden {
    position: relative;
}

.code-block-title-hidden pre {
    border-top-left-radius: var(--radius-lg, 18px);
    border-top-right-radius: var(--radius-lg, 18px);
}

.copy-button-floating {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
    opacity: 0.9;
    backdrop-filter: blur(10px);
}

/* Prism syntax highlighting for Code Snippet Block. */
.code-block .token.comment,
.code-block .token.prolog,
.code-block .token.doctype,
.code-block .token.cdata {
    color: #7dd3fc;
    opacity: 0.72;
    font-style: italic;
}

.code-block .token.punctuation {
    color: #cbd5e1;
}

.code-block .token.property,
.code-block .token.tag,
.code-block .token.boolean,
.code-block .token.number,
.code-block .token.constant,
.code-block .token.symbol,
.code-block .token.deleted {
    color: #f9a8d4;
}

.code-block .token.selector,
.code-block .token.attr-name,
.code-block .token.string,
.code-block .token.char,
.code-block .token.builtin,
.code-block .token.inserted {
    color: #86efac;
}

.code-block .token.operator,
.code-block .token.entity,
.code-block .token.url,
.code-block .language-css .token.string,
.code-block .style .token.string {
    color: #fde68a;
}

.code-block .token.atrule,
.code-block .token.attr-value,
.code-block .token.keyword {
    color: #93c5fd;
}

.code-block .token.function,
.code-block .token.class-name {
    color: #fcd34d;
}

.code-block .token.regex,
.code-block .token.important,
.code-block .token.variable {
    color: #fdba74;
}