/* ─── Blog index (bgx) ─── */
.bgx-hero {
    position: relative;
    padding: calc(var(--nav-height, 80px) + 56px) 0 clamp(56px, 6vw, 88px);
    background:
        radial-gradient(circle at 78% 30%, var(--spatial-glow), transparent 44%),
        linear-gradient(var(--spatial-grid) 1px, transparent 1px) 0 0 / 56px 56px,
        linear-gradient(90deg, var(--spatial-grid) 1px, transparent 1px) 0 0 / 56px 56px;
    border-bottom: 1px solid var(--spatial-line);
    overflow: hidden;
}

.bgx-hero::before {
    content: "";
    position: absolute;
    width: 640px;
    height: 640px;
    inset-inline-start: -220px;
    bottom: -320px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--spatial-glow), transparent 65%);
    pointer-events: none;
}

.bgx-hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: clamp(36px, 5vw, 80px);
    align-items: center;
}

.bgx-hero-grid.is-solo {
    grid-template-columns: minmax(0, 1fr);
    max-width: 860px;
    margin-inline: auto;
}

.bgx-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 34px;
    font-size: 12px;
    color: var(--text-muted);
}

.bgx-breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
}

.bgx-breadcrumb a:hover {
    color: var(--cyan);
}

.bgx-kicker,
.bgx-chapter-no {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin: 0 0 22px;
}

.bgx-kicker span,
.bgx-chapter-no span {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font: 10px monospace;
    letter-spacing: .2em;
    color: var(--text-muted);
    direction: ltr;
}

.bgx-kicker span::before,
.bgx-chapter-no span::before {
    content: "";
    width: 38px;
    height: 1px;
    background: var(--cyan);
}

.bgx-chapter-no span::before {
    background: var(--spatial-line);
}

.bgx-kicker b {
    padding-inline-start: 14px;
    border-inline-start: 1px solid var(--spatial-line);
    font-size: 13px;
    font-weight: 700;
    color: var(--cyan);
}

.bgx-title {
    margin: 0 0 20px;
    font-size: clamp(34px, 4.4vw, 64px);
    line-height: 1.22;
    font-weight: 800;
    color: var(--text-primary);
    text-shadow: 0 0 45px var(--spatial-glow);
}

.bgx-lede {
    margin: 0 0 36px;
    max-width: 560px;
    font-size: 16px;
    line-height: 1.95;
    color: var(--text-secondary);
}

.bgx-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
    border-top: 1px solid var(--spatial-line);
    border-bottom: 1px solid var(--spatial-line);
}

.bgx-stats > div {
    padding: 18px 0;
    padding-inline-end: 14px;
}

.bgx-stats > div + div {
    padding-inline-start: 18px;
    border-inline-start: 1px solid var(--spatial-line);
}

.bgx-stats dt {
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.bgx-stats dd {
    margin: 0;
    font: 700 clamp(28px, 2.8vw, 40px) / 1 monospace;
    color: var(--text-primary);
}

.bgx-stats dd.bgx-stats-date {
    font-family: inherit;
    font-size: 15px;
    line-height: 1.6;
}

/* Browser-bar frame */
.bgx-bar {
    height: 32px;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 0 14px;
    border-bottom: 1px solid var(--spatial-line);
    background: var(--bg-secondary);
    direction: ltr;
}

.bgx-bar i {
    width: 6px;
    height: 6px;
    border: 1px solid var(--text-muted);
    border-radius: 50%;
}

.bgx-bar > span {
    margin-left: auto;
    font: 9px monospace;
    letter-spacing: .16em;
    color: var(--text-muted);
}

/* Featured (latest) article */
.bgx-feature {
    position: relative;
    border: 1px solid var(--spatial-line);
    background: var(--bg-secondary);
    box-shadow: 0 40px 90px rgba(0, 0, 0, .3), 0 0 0 1px var(--spatial-glow);
    transform: perspective(1500px) rotateX(var(--bgx-rx, 0deg)) rotateY(var(--bgx-ry, 0deg));
    transition: transform .45s cubic-bezier(.2, .7, .2, 1);
}

.bgx-feature-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.bgx-feature-media {
    position: relative;
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-bottom: 1px solid var(--spatial-line);
}

.bgx-feature-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(2, 10, 16, .55));
    pointer-events: none;
}

.bgx-feature-media img,
.bgx-card-media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .8s cubic-bezier(.2, .7, .2, 1);
}

.bgx-feature-body {
    display: grid;
    gap: 12px;
    padding: clamp(20px, 2.4vw, 30px);
}

.bgx-feature-tag,
.bgx-card-cat {
    font-size: 12px;
    font-weight: 700;
    color: var(--cyan);
}

.bgx-feature-title {
    font-size: clamp(20px, 1.9vw, 27px);
    line-height: 1.5;
    font-weight: 800;
    color: var(--text-primary);
    transition: color .3s ease;
}

.bgx-feature-excerpt {
    font-size: 14px;
    line-height: 1.9;
    color: var(--text-secondary);
}

.bgx-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 16px;
    margin-top: 4px;
    padding-top: 14px;
    border-top: 1px solid var(--spatial-line);
    font-size: 12px;
    color: var(--text-muted);
}

.bgx-meta > span + span:not(.bgx-go)::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 4px;
    margin-inline-end: 16px;
    vertical-align: middle;
    background: var(--spatial-line);
}

.bgx-go {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    margin-inline-start: auto;
    border: 1px solid var(--spatial-line);
    font-size: 13px;
    color: var(--text-muted);
    transition: background .3s ease, border-color .3s ease, color .3s ease;
}

[dir="rtl"] .bgx-go {
    transform: scaleX(-1);
}

.bgx-feature-link:hover img,
.bgx-feature-link:focus-visible img,
.bgx-card-link:hover img,
.bgx-card-link:focus-visible img {
    transform: scale(1.05);
}

.bgx-feature-link:hover .bgx-feature-title,
.bgx-feature-link:focus-visible .bgx-feature-title,
.bgx-card-link:hover .bgx-card-title,
.bgx-card-link:focus-visible .bgx-card-title {
    color: var(--cyan);
}

.bgx-feature-link:hover .bgx-go,
.bgx-feature-link:focus-visible .bgx-go,
.bgx-card-link:hover .bgx-go,
.bgx-card-link:focus-visible .bgx-go {
    border-color: var(--cyan);
    background: var(--cyan);
    color: var(--bg-primary);
}

/* Topic index */
.bgx-topics {
    padding: clamp(48px, 6vw, 80px) 0 0;
}

.bgx-topic-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    border-top: 1px solid var(--spatial-line);
    border-inline-start: 1px solid var(--spatial-line);
}

.bgx-topic {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    min-height: 64px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--spatial-line);
    border-inline-end: 1px solid var(--spatial-line);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    transition: background .3s ease, color .3s ease;
}

.bgx-topic::after {
    content: "";
    position: absolute;
    inset-inline: 0;
    bottom: -1px;
    height: 2px;
    background: var(--cyan);
    scale: 0 1;
    transition: scale .35s cubic-bezier(.2, .7, .2, 1);
}

[dir="rtl"] .bgx-topic::after {
    transform-origin: right;
}

[dir="ltr"] .bgx-topic::after {
    transform-origin: left;
}

.bgx-topic-no {
    font: 10px monospace;
    letter-spacing: .12em;
    color: var(--text-muted);
}

.bgx-topic b {
    min-width: 30px;
    padding: 3px 7px;
    border: 1px solid var(--spatial-line);
    font: 700 11px monospace;
    text-align: center;
    color: var(--text-muted);
}

.bgx-topic:hover,
.bgx-topic:focus-visible {
    background: var(--spatial-glow);
    color: var(--text-primary);
}

.bgx-topic:hover::after,
.bgx-topic:focus-visible::after,
.bgx-topic[aria-current="page"]::after {
    scale: 1 1;
}

.bgx-topic[aria-current="page"] {
    background: var(--spatial-glow);
    color: var(--text-primary);
}

.bgx-topic[aria-current="page"] .bgx-topic-no,
.bgx-topic[aria-current="page"] b {
    color: var(--cyan);
    border-color: var(--cyan);
}

/* Archive */
.bgx-archive {
    padding: clamp(48px, 6vw, 80px) 0 clamp(72px, 8vw, 110px);
}

.bgx-archive-head {
    margin-bottom: 32px;
}

.bgx-heading {
    margin: 0;
    font-size: clamp(26px, 2.8vw, 40px);
    line-height: 1.35;
    font-weight: 800;
    color: var(--text-primary);
}

.bgx-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 2vw, 28px);
}

.bgx-card {
    min-width: 0;
}

.bgx-card-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--spatial-line);
    background: var(--bg-secondary);
    color: inherit;
    text-decoration: none;
    transition: border-color .35s ease, translate .35s cubic-bezier(.2, .7, .2, 1), box-shadow .35s ease;
}

.bgx-card-link:hover,
.bgx-card-link:focus-visible {
    border-color: var(--cyan);
    translate: 0 -4px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, .25), 0 0 0 1px var(--spatial-glow);
}

.bgx-card-media {
    position: relative;
    display: block;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-bottom: 1px solid var(--spatial-line);
    background:
        linear-gradient(var(--spatial-grid) 1px, transparent 1px) 0 0 / 28px 28px,
        linear-gradient(90deg, var(--spatial-grid) 1px, transparent 1px) 0 0 / 28px 28px,
        var(--bg-primary);
}

.bgx-card-no {
    position: absolute;
    top: 0;
    inset-inline-start: 0;
    padding: 6px 10px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--spatial-line);
    border-inline-end: 1px solid var(--spatial-line);
    font: 10px monospace;
    letter-spacing: .14em;
    color: var(--cyan);
}

.bgx-card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 10px;
    padding: 20px;
}

.bgx-card-title {
    font-size: 17px;
    line-height: 1.6;
    font-weight: 800;
    color: var(--text-primary);
    transition: color .3s ease;
}

.bgx-card-excerpt {
    flex: 1;
    font-size: 14px;
    line-height: 1.85;
    color: var(--text-secondary);
}

@media (min-width: 1025px) {
    .bgx-grid.has-wide > .bgx-card:first-child {
        grid-column: span 2;
    }

    .bgx-grid.has-wide > .bgx-card:first-child .bgx-card-link {
        display: grid;
        grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    }

    .bgx-grid.has-wide > .bgx-card:first-child .bgx-card-media {
        aspect-ratio: auto;
        min-height: 100%;
        border-bottom: 0;
        border-inline-end: 1px solid var(--spatial-line);
    }

    .bgx-grid.has-wide > .bgx-card:first-child .bgx-card-media img {
        position: absolute;
        inset: 0;
    }

    .bgx-grid.has-wide > .bgx-card:first-child .bgx-card-body {
        justify-content: center;
        padding: 30px;
    }

    .bgx-grid.has-wide > .bgx-card:first-child .bgx-card-title {
        font-size: 22px;
    }
}

.bgx-topic-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px 40px;
    margin-bottom: clamp(40px, 5vw, 64px);
    padding: clamp(22px, 3vw, 32px);
    border: 1px solid var(--spatial-line);
    border-inline-start: 2px solid var(--cyan);
    background: var(--bg-secondary);
}

.bgx-topic-cta h2 {
    margin: 0 0 6px;
    font-size: 20px;
    color: var(--text-primary);
}

.bgx-topic-cta p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.bgx-topic-cta-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.bgx-topic-cta-links a {
    padding: 10px 16px;
    border: 1px solid var(--spatial-line);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: border-color .3s ease, color .3s ease;
}

.bgx-topic-cta-links a:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.bgx-empty {
    padding: 64px 0;
    text-align: center;
    color: var(--text-muted);
}

/* Pagination */
.bgx-pager {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: clamp(40px, 5vw, 64px);
}

.bgx-pager-numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.bgx-pager-numbers a,
.bgx-pager-numbers span,
.bgx-pager-step {
    display: inline-grid;
    place-items: center;
    min-width: 44px;
    height: 44px;
    padding: 0 12px;
    border: 1px solid var(--spatial-line);
    font: 12px monospace;
    letter-spacing: .1em;
    color: var(--text-secondary);
    text-decoration: none;
    transition: border-color .3s ease, color .3s ease, background .3s ease;
}

.bgx-pager-step {
    display: inline-flex;
    gap: 10px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
}

.bgx-pager-step::before {
    content: "→";
}

.bgx-pager-step.is-next::before {
    content: none;
}

.bgx-pager-step.is-next::after {
    content: "←";
}

[dir="ltr"] .bgx-pager-step::before {
    content: "←";
}

[dir="ltr"] .bgx-pager-step.is-next::before {
    content: none;
}

[dir="ltr"] .bgx-pager-step.is-next::after {
    content: "→";
}

.bgx-pager-numbers .bgx-pager-gap {
    border-color: transparent;
    min-width: 20px;
    padding: 0;
}

.bgx-pager-numbers a:hover,
.bgx-pager-step:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.bgx-pager-numbers .is-active {
    border-color: var(--cyan);
    background: var(--cyan);
    color: var(--bg-primary);
    font-weight: 700;
}

.bgx-pager-info {
    margin: 16px 0 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
    .bgx-hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .bgx-feature {
        transform: none;
    }

    .bgx-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .bgx-hero {
        padding-top: calc(var(--nav-height, 70px) + 30px);
    }

    .bgx-breadcrumb {
        margin-bottom: 24px;
    }

    .bgx-lede {
        font-size: 15px;
        margin-bottom: 28px;
    }

    .bgx-stats > div + div {
        padding-inline-start: 12px;
    }

    .bgx-stats dd {
        font-size: 26px;
    }

    .bgx-stats dd.bgx-stats-date {
        font-size: 13px;
    }

    .bgx-topic-list {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
        margin-inline: -16px;
        padding-inline: 16px;
        scroll-padding-inline: 16px;
        border: 0;
        gap: 8px;
    }

    .bgx-topic-list::-webkit-scrollbar {
        display: none;
    }

    .bgx-topic {
        flex: 0 0 auto;
        max-width: 78vw;
        min-height: 52px;
        border: 1px solid var(--spatial-line);
        scroll-snap-align: start;
        white-space: nowrap;
    }

    .bgx-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .bgx-card-body {
        padding: 18px 16px;
    }

    .bgx-pager-step {
        flex: 1 1 40%;
    }

    .bgx-pager-numbers {
        order: -1;
        width: 100%;
        justify-content: center;
    }
}

/* Motion: !important is needed to override the blanket animation kill in mobile.css. */
@keyframes bgx-rise {
    from { opacity: 0; translate: 0 26px; }
    to { opacity: 1; translate: 0 0; }
}

@keyframes bgx-feature-in {
    from { opacity: 0; translate: 0 44px; scale: .96; }
    to { opacity: 1; translate: 0 0; scale: 1; }
}

@keyframes bgx-grid-drift {
    to { background-position: 0 0, 56px 56px, 56px 56px; }
}

@keyframes bgx-scan {
    0% { transform: translateY(0); opacity: 0; }
    10% { opacity: 1; }
    100% { transform: translateY(var(--bgx-scan, 380px)); opacity: 0; }
}

@keyframes bgx-line {
    from { scale: 0 1; }
    to { scale: 1 1; }
}

@media (prefers-reduced-motion: no-preference) {
    .bgx-hero {
        animation: bgx-grid-drift 24s linear infinite !important;
    }

    .bgx-hero-copy > * {
        animation: bgx-rise .8s cubic-bezier(.2, .7, .2, 1) both !important;
    }

    .bgx-hero-copy > :nth-child(2) { animation-delay: .08s !important; }
    .bgx-hero-copy > :nth-child(3) { animation-delay: .16s !important; }
    .bgx-hero-copy > :nth-child(4) { animation-delay: .24s !important; }
    .bgx-hero-copy > :nth-child(5) { animation-delay: .32s !important; }

    .bgx-kicker span::before {
        transform-origin: right;
        animation: bgx-line .9s .3s cubic-bezier(.2, .7, .2, 1) both !important;
    }

    .bgx-feature {
        animation: bgx-feature-in 1s .2s cubic-bezier(.2, .7, .2, 1) both !important;
        transition: transform .45s cubic-bezier(.2, .7, .2, 1) !important;
    }

    .bgx-feature-media::before {
        content: "";
        position: absolute;
        z-index: 1;
        inset-inline: 0;
        top: 0;
        height: 2px;
        background: linear-gradient(90deg, transparent, var(--cyan), transparent);
        opacity: 0;
        pointer-events: none;
        animation: bgx-scan 5s 1.4s ease-in-out infinite !important;
    }

    .bgx-feature-media img,
    .bgx-card-media img {
        transition: transform .8s cubic-bezier(.2, .7, .2, 1) !important;
    }

    .bgx-card-link,
    .bgx-topic,
    .bgx-topic::after,
    .bgx-go,
    .bgx-card-title,
    .bgx-feature-title,
    .bgx-pager-numbers a,
    .bgx-pager-step {
        transition-duration: .35s !important;
    }

    .bgx-motion .bgx-chapter-no,
    .bgx-motion .bgx-heading,
    .bgx-motion .bgx-topic,
    .bgx-motion .bgx-card,
    .bgx-motion .bgx-topic-cta,
    .bgx-motion .bgx-pager {
        opacity: 0;
        translate: 0 28px;
        transition:
            opacity .8s cubic-bezier(.2, .7, .2, 1) var(--bgx-d, 0ms),
            translate .8s cubic-bezier(.2, .7, .2, 1) var(--bgx-d, 0ms) !important;
    }

    .bgx-motion .is-in.bgx-chapter-no,
    .bgx-motion .is-in.bgx-heading,
    .bgx-motion .is-in.bgx-topic,
    .bgx-motion .is-in.bgx-card,
    .bgx-motion .is-in.bgx-topic-cta,
    .bgx-motion .is-in.bgx-pager {
        opacity: 1;
        translate: 0 0;
    }

    .bgx-motion .is-in.bgx-topic {
        transition:
            opacity .8s cubic-bezier(.2, .7, .2, 1) var(--bgx-d, 0ms),
            translate .8s cubic-bezier(.2, .7, .2, 1) var(--bgx-d, 0ms),
            background .35s ease,
            color .35s ease !important;
    }
}