.ai-series-page,
.ai-article,
.ai-home-feature,
.ai-blog-feature {
    --ai-bg: #080b10;
    --ai-panel: #11161d;
    --ai-panel-soft: #181e27;
    --ai-red: #ff2638;
    --ai-white: #f8fafc;
    --ai-muted: #aeb7c4;
    --ai-line: #303844;
    letter-spacing: 0;
}

.ai-series-page *,
.ai-article *,
.ai-home-feature *,
.ai-blog-feature * {
    letter-spacing: 0;
}

.ai-series-hero {
    overflow: hidden;
    background: var(--ai-bg);
    color: var(--ai-white);
}

.ai-series-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
    align-items: center;
    gap: 72px;
    min-height: 720px;
    padding-top: 58px;
    padding-bottom: 58px;
}

.ai-series-kicker {
    display: block;
    margin-bottom: 18px;
    color: var(--ai-red);
    font-size: .88rem;
    font-weight: 800;
    text-transform: uppercase;
}

.ai-series-hero h1 {
    max-width: 760px;
    margin: 0;
    color: var(--ai-white);
    font-size: 5rem;
    font-weight: 900;
    line-height: .96;
}

.ai-series-hero h1 span {
    display: block;
    color: var(--ai-red);
}

.ai-series-lead {
    max-width: 680px;
    margin: 28px 0 0;
    color: #d8dde5;
    font-size: 1.3rem;
    line-height: 1.65;
}

.ai-series-actions {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 34px;
    color: var(--ai-muted);
    font-size: .95rem;
}

.ai-series-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 50px;
    padding: 13px 20px;
    border: 1px solid var(--ai-red);
    border-radius: 6px;
    background: var(--ai-red);
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    transition: background-color .2s ease, color .2s ease;
}

.ai-series-button:hover {
    background: transparent;
    color: var(--ai-white);
}

.ai-series-hero-media {
    position: relative;
    display: block;
    border: 1px solid var(--ai-line);
    border-radius: 6px;
    background: #05070a;
    box-shadow: 24px 24px 0 #151a21;
}

.ai-series-hero-media img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
    border-radius: 5px;
}

.ai-series-hero-label {
    position: absolute;
    left: 14px;
    bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 13px;
    border: 1px solid var(--ai-red);
    border-radius: 4px;
    background: rgba(8, 11, 16, .94);
    color: #fff;
    font-size: .86rem;
    font-weight: 800;
}

.ai-series-intro {
    border-top: 1px solid var(--ai-line);
    border-bottom: 1px solid var(--ai-line);
    background: var(--ai-panel);
    color: var(--ai-white);
}

.ai-series-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(420px, .8fr);
    align-items: center;
    gap: 54px;
    padding-top: 34px;
    padding-bottom: 34px;
}

.ai-series-intro p {
    margin: 0;
    color: #c8d0dc;
    font-size: 1.08rem;
    line-height: 1.7;
}

.ai-series-intro p strong {
    color: #fff;
}

.ai-series-intro dl {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin: 0;
}

.ai-series-intro dl div {
    padding: 0 20px;
    border-left: 1px solid var(--ai-line);
}

.ai-series-intro dt {
    color: var(--ai-red);
    font-size: 1.35rem;
    font-weight: 900;
}

.ai-series-intro dd {
    margin: 3px 0 0;
    color: var(--ai-muted);
    font-size: .82rem;
}

.ai-series-catalog {
    padding: 90px 0;
    background: #eef1f5;
}

.ai-series-section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 36px;
    margin-bottom: 38px;
}

.ai-series-section-head span {
    color: #d61f32;
    font-size: .82rem;
    font-weight: 800;
    text-transform: uppercase;
}

.ai-series-section-head h2 {
    margin: 6px 0 0;
    color: #0b0f14;
    font-size: 2.7rem;
}

.ai-series-section-head p {
    max-width: 480px;
    margin: 0;
    color: #586273;
    line-height: 1.65;
}

.ai-series-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.ai-series-card {
    overflow: hidden;
    border: 1px solid #d7dce4;
    border-radius: 6px;
    background: #fff;
}

.ai-series-card-media {
    display: block;
    overflow: hidden;
    background: var(--ai-bg);
}

.ai-series-card-media img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
    transition: transform .25s ease;
}

.ai-series-card:hover .ai-series-card-media img {
    transform: scale(1.018);
}

.ai-series-card-body {
    padding: 22px;
}

.ai-series-card-body > span {
    color: #e31f33;
    font-size: .78rem;
    font-weight: 900;
}

.ai-series-card h3 {
    margin: 8px 0 11px;
    font-size: 1.35rem;
    line-height: 1.25;
}

.ai-series-card h3 a {
    color: #10151c;
    text-decoration: none;
}

.ai-series-card p {
    display: -webkit-box;
    overflow: hidden;
    margin: 0;
    color: #5b6573;
    line-height: 1.65;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.ai-series-text-link {
    display: inline-flex;
    gap: 8px;
    margin-top: 18px;
    color: #c8192b;
    font-weight: 800;
    text-decoration: none;
}

.ai-series-business {
    padding: 68px 0;
    background: var(--ai-bg);
    color: #fff;
}

.ai-series-business-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.ai-series-business span {
    color: var(--ai-red);
    font-size: .82rem;
    font-weight: 800;
    text-transform: uppercase;
}

.ai-series-business h2 {
    max-width: 720px;
    margin: 8px 0 0;
    color: #fff;
    font-size: 2.4rem;
}

.ai-series-business p {
    max-width: 760px;
    margin: 14px 0 0;
    color: var(--ai-muted);
}

/* Home and blog editorial entry points */
.ai-home-feature,
.ai-blog-feature {
    background: var(--ai-bg);
    color: var(--ai-white);
}

.ai-home-feature-grid {
    display: grid;
    grid-template-columns: minmax(0, .82fr) minmax(520px, 1.18fr);
    align-items: center;
    gap: 64px;
    padding-top: 74px;
    padding-bottom: 74px;
}

.ai-home-copy h2,
.ai-blog-feature h2 {
    margin: 0;
    color: #fff;
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.06;
}

.ai-home-copy h2 strong {
    display: block;
    color: var(--ai-red);
}

.ai-home-copy p,
.ai-blog-feature p {
    margin: 22px 0 28px;
    color: #bac2ce;
    font-size: 1.08rem;
    line-height: 1.7;
}

.ai-home-posters {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 13px;
}

.ai-home-posters a {
    position: relative;
    display: block;
    overflow: hidden;
    border: 1px solid #343c48;
    border-radius: 4px;
}

.ai-home-posters img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
}

.ai-home-posters a:nth-child(2) {
    transform: translateY(22px);
}

.ai-home-posters span {
    position: absolute;
    right: 7px;
    bottom: 7px;
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--ai-red);
    color: #fff;
    font-size: .72rem;
    font-weight: 900;
}

.ai-blog-feature {
    padding: 68px 0;
}

.ai-blog-feature-grid {
    display: grid;
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
    align-items: center;
    gap: 62px;
}

.ai-blog-feature-media {
    display: block;
    border: 1px solid var(--ai-line);
    border-radius: 5px;
    box-shadow: 18px 18px 0 #171c23;
}

.ai-blog-feature-media img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
    border-radius: 4px;
}

.ai-blog-chapters {
    display: grid;
    gap: 8px;
    margin: 0 0 28px;
}

.ai-blog-chapters a {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--ai-line);
    color: #dfe4eb;
    font-weight: 700;
    text-decoration: none;
}

.ai-blog-chapters a span {
    color: var(--ai-red);
}

/* Individual chapter */
.ai-article-hero {
    padding: 58px 0 66px;
    background: var(--ai-bg);
    color: #fff;
}

.ai-article-hero-grid {
    display: grid;
    grid-template-columns: minmax(320px, 460px) minmax(0, 1fr);
    align-items: center;
    gap: 78px;
}

.ai-article-poster {
    margin: 0;
    border: 1px solid var(--ai-line);
    border-radius: 6px;
    box-shadow: 22px 22px 0 #171c23;
}

.ai-article-poster img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
    border-radius: 5px;
}

.ai-article-back {
    display: inline-flex;
    margin-bottom: 36px;
    color: #b9c2ce;
    font-weight: 700;
    text-decoration: none;
}

.ai-article-heading h1 {
    margin: 0;
    color: #fff;
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.02;
}

.ai-article-heading > p {
    margin: 24px 0 0;
    color: #c5cdd8;
    font-size: 1.2rem;
    line-height: 1.7;
}

.ai-article-meta {
    display: flex;
    gap: 24px;
    margin-top: 30px;
    color: #8f9aa8;
    font-size: .9rem;
}

.ai-article-layout {
    display: grid;
    grid-template-columns: minmax(0, 760px) minmax(240px, 300px);
    justify-content: space-between;
    gap: 72px;
    padding-top: 76px;
    padding-bottom: 82px;
}

.ai-article-body > p {
    margin: 0 0 24px;
    color: #28313d;
    font-size: 1.13rem;
    line-height: 1.85;
}

.ai-article-body > p:first-child {
    color: #111820;
    font-size: 1.28rem;
    font-weight: 650;
}

.ai-article-question {
    margin: 46px 0 30px;
    padding: 28px;
    border: 1px solid #e21f34;
    border-left-width: 6px;
    border-radius: 6px;
    background: #0d1117;
}

.ai-article-question span {
    color: var(--ai-red);
    font-size: .8rem;
    font-weight: 900;
    text-transform: uppercase;
}

.ai-article-question h2 {
    margin: 8px 0 0;
    color: #fff;
    font-size: 1.75rem;
    line-height: 1.35;
}

.ai-article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-article-tags span {
    padding: 7px 10px;
    border: 1px solid #d5dae2;
    border-radius: 4px;
    color: #56606e;
    font-size: .78rem;
    font-weight: 700;
}

.ai-article-aside {
    align-self: start;
    position: sticky;
    top: 110px;
    padding: 24px;
    border-top: 4px solid var(--ai-red);
    background: #11161d;
    color: #fff;
}

.ai-article-aside > span {
    color: var(--ai-red);
    font-size: .78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.ai-article-aside strong {
    display: block;
    margin-top: 8px;
    font-size: 1.35rem;
    line-height: 1.2;
}

.ai-article-aside p {
    margin: 14px 0;
    color: #aeb7c4;
    line-height: 1.6;
}

.ai-article-aside a {
    color: #fff;
    font-weight: 800;
}

.ai-article-pagination {
    border-top: 1px solid #d7dce3;
    background: #eef1f5;
}

.ai-article-pagination-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    padding-top: 0;
    padding-bottom: 0;
    background: #d7dce3;
}

.ai-article-pagination a,
.ai-article-pagination-grid > span {
    min-height: 138px;
    padding: 30px;
    background: #eef1f5;
    color: #111820;
    text-decoration: none;
}

.ai-article-pagination a:last-child {
    text-align: right;
}

.ai-article-pagination a span {
    display: block;
    margin-bottom: 7px;
    color: #d51c31;
    font-size: .78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.ai-article-pagination a strong {
    display: block;
    font-size: 1.1rem;
}

@media (max-width: 980px) {
    .ai-series-hero-grid,
    .ai-article-hero-grid {
        grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
        gap: 42px;
    }

    .ai-series-hero h1 {
        font-size: 4rem;
    }

    .ai-series-intro-grid,
    .ai-home-feature-grid {
        grid-template-columns: 1fr;
    }

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

    .ai-article-heading h1 {
        font-size: 3rem;
    }

    .ai-article-layout {
        grid-template-columns: 1fr;
    }

    .ai-article-aside {
        position: static;
    }
}

@media (max-width: 680px) {
    .ai-series-hero-grid,
    .ai-article-hero-grid,
    .ai-blog-feature-grid {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 42px;
    }

    .ai-series-hero-grid {
        padding-top: 44px;
        padding-bottom: 54px;
    }

    .ai-series-hero h1 {
        font-size: 3.15rem;
    }

    .ai-series-lead,
    .ai-article-heading > p {
        font-size: 1.05rem;
    }

    .ai-series-actions,
    .ai-series-section-head,
    .ai-series-business-inner {
        align-items: stretch;
        flex-direction: column;
    }

    .ai-series-hero-media,
    .ai-article-poster,
    .ai-blog-feature-media {
        width: min(90%, 400px);
        margin-right: auto;
        margin-left: auto;
        box-shadow: 12px 12px 0 #151a21;
    }

    .ai-series-intro-grid {
        grid-template-columns: 1fr;
        gap: 26px;
    }

    .ai-series-intro dl {
        border-top: 1px solid var(--ai-line);
        padding-top: 22px;
    }

    .ai-series-intro dl div:first-child {
        padding-left: 0;
        border-left: 0;
    }

    .ai-series-catalog {
        padding: 58px 0;
    }

    .ai-series-section-head h2,
    .ai-home-copy h2,
    .ai-blog-feature h2,
    .ai-series-business h2 {
        font-size: 2.1rem;
    }

    .ai-series-grid {
        grid-template-columns: 1fr;
    }

    .ai-series-button {
        width: 100%;
    }

    .ai-home-feature-grid {
        padding-top: 56px;
        padding-bottom: 70px;
    }

    .ai-home-posters {
        gap: 7px;
    }

    .ai-home-posters a:nth-child(2) {
        transform: translateY(12px);
    }

    .ai-blog-feature {
        padding: 54px 0;
    }

    .ai-article-hero {
        padding-top: 42px;
    }

    .ai-article-heading {
        order: -1;
    }

    .ai-article-heading h1 {
        font-size: 2.65rem;
    }

    .ai-article-layout {
        padding-top: 54px;
        padding-bottom: 58px;
    }

    .ai-article-body > p {
        font-size: 1.04rem;
    }

    .ai-article-body > p:first-child {
        font-size: 1.12rem;
    }

    .ai-article-question {
        padding: 22px;
    }

    .ai-article-question h2 {
        font-size: 1.45rem;
    }

    .ai-article-pagination-grid {
        grid-template-columns: 1fr;
    }

    .ai-article-pagination a,
    .ai-article-pagination-grid > span {
        min-height: 0;
    }

    .ai-article-pagination a:last-child {
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ai-series-card-media img,
    .ai-series-button {
        transition: none;
    }
}