/* The Thinking Lens Series system
   Editorial catalogue + individual Series pages + contextual article navigation. */

:root {
    --ttl-series-ink: var(--color-darkgrey);
    --ttl-series-muted: #6f7376;
    --ttl-series-line: #dedede;
    --ttl-series-soft: #f7f7f5;
    --ttl-series-max: 980px;
    --ttl-series-reading: 760px;
}

.ttl-series-page {
    color: var(--ttl-series-ink);
}

.ttl-series-page a {
    color: inherit;
}

.ttl-series-inner {
    width: 100%;
    max-width: var(--ttl-series-max);
    margin: 0 auto;
    padding: 8rem max(4vmin, 20px) 10rem;
}

.ttl-series-reading {
    max-width: var(--ttl-series-reading);
}

.ttl-series-eyebrow {
    margin: 0;
    color: var(--ttl-series-muted);
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: .11em;
    line-height: 1.4;
    text-transform: uppercase;
}

.ttl-series-title {
    margin: 1.4rem 0 0;
    max-width: 900px;
    font-family: var(--gh-font-heading, var(--font-sans));
    font-size: clamp(4.4rem, 6vw, 7.4rem);
    line-height: 1.02;
    letter-spacing: -.035em;
}

.ttl-series-question {
    margin: 2.6rem 0 0;
    max-width: 760px;
    font-family: var(--gh-font-heading, var(--font-sans));
    font-size: clamp(2.2rem, 3vw, 3.3rem);
    font-weight: 500;
    line-height: 1.25;
    letter-spacing: -.018em;
}

.ttl-series-lede,
.ttl-series-copy {
    margin: 2.4rem 0 0;
    max-width: 760px;
    font-size: 1.8rem;
    line-height: 1.75;
}

.ttl-series-lede {
    color: var(--ttl-series-muted);
}

.ttl-series-copy + .ttl-series-copy {
    margin-top: 1.4rem;
}

.ttl-series-back,
.ttl-series-cta,
.ttl-series-read {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: var(--ttl-series-ink);
    font-family: var(--font-sans);
    font-size: 1.4rem;
    font-weight: 700;
}

.ttl-series-back:hover,
.ttl-series-cta:hover,
.ttl-series-read:hover {
    text-decoration: underline;
    text-underline-offset: .35em;
}

.ttl-series-back {
    margin-bottom: 3.8rem;
    color: var(--ttl-series-muted);
}

.ttl-series-cta {
    margin-top: 3rem;
    padding: 0 1.8rem;
    border-radius: 999px;
    color: #fff;
    background: var(--ghost-accent-color);
    text-decoration: none;
}

.ttl-series-cta:hover {
    color: #fff;
    text-decoration: none;
    filter: brightness(.94);
}

/* Hub */
.ttl-series-hub-intro {
    max-width: 760px;
    margin-bottom: 5rem;
}

.ttl-series-hub-intro .ttl-series-title {
    font-size: clamp(4.2rem, 5.8vw, 7rem);
}

.ttl-series-row {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(230px, .75fr);
    gap: 4.8rem;
    padding: 4rem 0;
    border-top: 1px solid var(--ttl-series-line);
}

.ttl-series-row-title {
    margin: 1.2rem 0 0;
    font-size: clamp(2.7rem, 3.2vw, 3.8rem);
    line-height: 1.08;
    letter-spacing: -.025em;
}

.ttl-series-row-question {
    margin: 1.3rem 0 0;
    max-width: 640px;
    font-size: 1.85rem;
    font-weight: 600;
    line-height: 1.5;
}

.ttl-series-row-description {
    margin: 1.4rem 0 0;
    max-width: 650px;
    color: var(--ttl-series-muted);
    font-size: 1.55rem;
    line-height: 1.7;
}

.ttl-series-arc-wrap {
    align-self: center;
}

.ttl-series-arc {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .7rem;
    margin-top: 1.2rem;
    color: var(--ttl-series-muted);
    font-family: var(--font-sans);
    font-size: 1.2rem;
    line-height: 1.4;
}

.ttl-series-arc span:not(.ttl-series-arrow) {
    padding: .55rem .9rem;
    border: 1px solid var(--ttl-series-line);
    border-radius: 999px;
}

.ttl-series-arrow {
    opacity: .65;
}

.ttl-series-footer-note {
    margin-top: 1rem;
    padding-top: 3.2rem;
    border-top: 1px solid var(--ttl-series-line);
}

/* Detail pages */
.ttl-series-sequence {
    max-width: var(--ttl-series-reading);
    margin-top: 6rem;
}

.ttl-series-section-heading {
    margin: .8rem 0 0;
    font-size: clamp(2.7rem, 3.5vw, 3.7rem);
    line-height: 1.15;
    letter-spacing: -.025em;
}

.ttl-series-entry {
    display: grid;
    grid-template-columns: 12rem minmax(0, 1fr);
    gap: 2.2rem;
    padding: 3.4rem 0;
    border-top: 1px solid var(--ttl-series-line);
}

.ttl-series-sequence > .ttl-series-entry:first-of-type {
    margin-top: 1.8rem;
}

.ttl-series-step {
    padding-top: .35rem;
    color: var(--ttl-series-muted);
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: .08em;
    line-height: 1.5;
    text-transform: uppercase;
}

.ttl-series-step span {
    display: block;
    margin-top: .35rem;
    font-weight: 500;
    letter-spacing: 0;
    text-transform: none;
}

.ttl-series-entry h3,
.ttl-series-entry h4 {
    margin: 0;
    font-size: 2.5rem;
    line-height: 1.2;
    letter-spacing: -.018em;
}

.ttl-series-entry p {
    margin: 1.3rem 0 0;
    color: var(--ttl-series-muted);
    font-size: 1.6rem;
    line-height: 1.72;
}

.ttl-series-read {
    margin-top: 1.4rem;
}

.ttl-series-movement {
    padding: 4.6rem 0 .8rem;
    border-top: 1px solid var(--ttl-series-line);
}

.ttl-series-movement:first-of-type {
    margin-top: 1.8rem;
}

.ttl-series-movement > p {
    max-width: 680px;
    margin: 1.2rem 0 1.4rem;
    color: var(--ttl-series-muted);
    font-size: 1.6rem;
    line-height: 1.72;
}

.ttl-series-movement .ttl-series-entry {
    grid-template-columns: 12rem minmax(0, 1fr);
    padding: 2.5rem 0;
}

.ttl-series-correction {
    max-width: var(--ttl-series-reading);
    margin-top: 5.4rem;
    padding: .3rem 0 .3rem 2.2rem;
    border-left: 2px solid var(--ghost-accent-color);
}

.ttl-series-correction p {
    margin: 1.2rem 0 0;
    font-size: 1.6rem;
    line-height: 1.72;
}

.ttl-series-closing {
    max-width: var(--ttl-series-reading);
    margin-top: 6rem;
    padding-top: 3.8rem;
    border-top: 1px solid var(--ttl-series-line);
}

.ttl-series-closing p {
    margin: 1.5rem 0 0;
    font-family: var(--gh-font-heading, var(--font-sans));
    font-size: 2.35rem;
    line-height: 1.55;
}

/* Article Series context */
.ttl-series-context,
.ttl-series-continuation {
    display: none;
}

body.has-series-context .ttl-series-context,
body.has-series-context .ttl-series-continuation {
    display: block;
}

body.has-series-context .read-more-wrap {
    display: none;
}

.ttl-series-context-inner,
.ttl-series-continuation-inner {
    max-width: 840px;
    margin: 0 auto;
}

.ttl-series-context-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    margin-top: 2.4rem;
    padding: 1.5rem 1.8rem;
    border: 1px solid var(--ttl-series-line);
    border-radius: 10px;
    background: var(--ttl-series-soft);
}

.ttl-series-context-title {
    margin: .3rem 0 0;
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.45;
}

.ttl-series-context-link {
    flex: 0 0 auto;
    color: var(--ttl-series-ink);
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 700;
}

.ttl-series-continuation {
    padding-top: 2.4rem;
    padding-bottom: 4rem;
}

.ttl-series-continuation-inner {
    padding-top: 2.8rem;
    border-top: 1px solid var(--ttl-series-line);
}

.ttl-series-nav-label {
    margin-bottom: 1.2rem;
}

.ttl-series-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem;
}

.ttl-series-nav-link {
    display: flex;
    flex-direction: column;
    min-height: 9rem;
    padding: 1.5rem 1.6rem;
    border: 1px solid var(--ttl-series-line);
    border-radius: 9px;
    color: var(--ttl-series-ink);
}

.ttl-series-nav-link:hover {
    border-color: var(--ghost-accent-color);
}

.ttl-series-nav-link--next {
    text-align: right;
}

.ttl-series-nav-direction {
    color: var(--ttl-series-muted);
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.ttl-series-nav-title {
    margin-top: .7rem;
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.4;
}

.ttl-series-overview-link {
    display: inline-block;
    margin-top: 1.8rem;
    color: var(--ttl-series-muted);
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 700;
}

@media (max-width: 760px) {
    .ttl-series-inner {
        padding-top: 5.5rem;
        padding-bottom: 7rem;
    }

    .ttl-series-row {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 3.2rem 0;
    }

    .ttl-series-arc-wrap {
        align-self: auto;
    }

    .ttl-series-entry,
    .ttl-series-movement .ttl-series-entry {
        grid-template-columns: 1fr;
        gap: .8rem;
    }

    .ttl-series-step {
        padding-top: 0;
    }

    .ttl-series-context-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 1rem;
    }

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

    .ttl-series-nav-link--next {
        text-align: left;
    }
}

@media (prefers-color-scheme: dark) {
    html.auto-color .ttl-series-page,
    html.auto-color .ttl-series-context-inner,
    html.auto-color .ttl-series-nav-link {
        --ttl-series-ink: #f4f4f4;
        --ttl-series-muted: #b1b1b1;
        --ttl-series-line: #3f4144;
        --ttl-series-soft: #1d1f20;
    }
}

html.dark-mode .ttl-series-page,
html.dark-mode .ttl-series-context-inner,
html.dark-mode .ttl-series-nav-link {
    --ttl-series-ink: #f4f4f4;
    --ttl-series-muted: #b1b1b1;
    --ttl-series-line: #3f4144;
    --ttl-series-soft: #1d1f20;
}