:root {
    --bg: #09090a;
    --surface: #131315;
    --surface-2: #1a1a1d;
    --line: rgba(255, 255, 255, 0.11);
    --gold: #f5c518;
    --ink: #f7f7f4;
    --muted: #aaa9a4;
    --display: "Montserrat", sans-serif;
    --body: "Inter", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--ink);
    background: var(--bg);
    font-family: var(--body);
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 50;
    pointer-events: none;
    opacity: 0.022;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");
}

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

img {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
}

.container {
    width: min(90%, 1180px);
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 10px 14px;
    color: #000;
    background: var(--gold);
    transform: translateY(-180%);
}

.skip-link:focus {
    transform: translateY(0);
}

:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 4px;
}

.reading-progress {
    width: 0;
    height: 3px;
    position: fixed;
    inset: 0 auto auto 0;
    z-index: 60;
    background: var(--gold);
}

.article-nav {
    position: sticky;
    top: 0;
    z-index: 25;
    border-bottom: 1px solid var(--line);
    background: rgba(9, 9, 10, 0.91);
    backdrop-filter: blur(16px);
}

.article-nav .container {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    font-family: var(--display);
    font-size: 0.88rem;
    font-weight: 900;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 23px;
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 700;
}

.nav-links a:hover {
    color: var(--ink);
}

.nav-cta {
    padding: 9px 15px;
    color: #080808;
    border-radius: 4px;
    background: var(--gold);
    font-family: var(--display);
    font-size: 0.75rem;
    font-weight: 900;
    text-transform: uppercase;
}

.article-hero {
    padding: 78px 0 66px;
    border-bottom: 1px solid var(--line);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(270px, 0.65fr);
    align-items: end;
    gap: clamp(54px, 8vw, 110px);
}

.eyebrow {
    display: block;
    margin-bottom: 22px;
    color: var(--gold);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    font-family: var(--display);
    line-height: 1.09;
    letter-spacing: 0;
    text-wrap: balance;
}

h1 {
    max-width: 900px;
    margin-bottom: 25px;
    font-size: clamp(2.8rem, 6vw, 5.7rem);
}

.dek {
    max-width: 770px;
    color: var(--muted);
    font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.article-meta {
    margin-top: 32px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 13px 22px;
    color: var(--muted);
    font-size: 0.82rem;
}

.author-chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 800;
}

.author-chip img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    object-position: center top;
    border: 1px solid var(--gold);
    border-radius: 4px;
}

.hero-tool {
    padding: 26px 0 4px 27px;
    border-left: 1px solid var(--gold);
}

.hero-tool span {
    display: block;
    margin-bottom: 12px;
    color: var(--gold);
    font-size: 0.69rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hero-tool strong {
    display: block;
    margin-bottom: 12px;
    font: 800 1.18rem/1.25 var(--display);
}

.hero-tool p {
    color: var(--muted);
    font-size: 0.9rem;
}

.article-shell {
    width: min(90%, 1180px);
    margin-inline: auto;
    display: grid;
    grid-template-columns: 230px minmax(0, 720px);
    justify-content: center;
    gap: clamp(45px, 7vw, 92px);
    padding: 66px 0 112px;
}

.article-rail {
    position: sticky;
    top: 108px;
    align-self: start;
}

.article-rail > span {
    display: block;
    margin-bottom: 17px;
    color: var(--gold);
    font-size: 0.68rem;
    font-weight: 900;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.article-rail ol {
    margin-bottom: 27px;
    list-style: none;
    counter-reset: toc;
}

.article-rail li {
    counter-increment: toc;
}

.article-rail a {
    display: grid;
    grid-template-columns: 25px 1fr;
    gap: 7px;
    padding: 8px 0;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.35;
}

.article-rail a::before {
    content: "0" counter(toc);
    color: #686865;
    font-size: 0.68rem;
}

.article-rail a:hover {
    color: var(--ink);
}

.rail-book {
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.rail-book p {
    margin-bottom: 14px;
    color: var(--muted);
    font-size: 0.82rem;
}

.rail-book a {
    display: inline-flex;
    padding: 10px 13px;
    color: #080808;
    border-radius: 4px;
    background: var(--gold);
    font-weight: 900;
}

.rail-book a::before {
    display: none;
}

.article-body {
    min-width: 0;
    color: #dededb;
    font-size: 1.04rem;
}

.article-body > p,
.article-body > ul,
.article-body > ol {
    margin-bottom: 25px;
}

.article-body > p:first-child {
    color: var(--ink);
    font-size: 1.17rem;
}

.article-body h2 {
    margin: 64px 0 22px;
    color: var(--ink);
    font-size: clamp(1.85rem, 4vw, 2.75rem);
    scroll-margin-top: 105px;
}

.article-body h3 {
    margin: 36px 0 14px;
    color: var(--ink);
    font-size: 1.3rem;
}

.article-body ul,
.article-body ol {
    padding-left: 23px;
}

.article-body li {
    margin-bottom: 11px;
    padding-left: 4px;
}

.article-body strong {
    color: var(--ink);
}

.article-body a:not(.button) {
    color: var(--gold);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.pullquote {
    margin: 44px 0;
    padding: 27px 0;
    color: var(--ink);
    border-top: 1px solid var(--gold);
    border-bottom: 1px solid var(--gold);
    font: 800 clamp(1.3rem, 3vw, 1.9rem)/1.3 var(--display);
}

.insight-box,
.action-box,
.source-box {
    margin: 38px 0;
    padding: 27px 29px;
    background: var(--surface);
}

.insight-box {
    border-left: 3px solid #666;
}

.action-box {
    border-left: 3px solid var(--gold);
}

.insight-box h3,
.action-box h3,
.source-box h2 {
    margin: 0 0 12px;
    color: var(--ink);
}

.action-box h3 {
    color: var(--gold);
}

.action-box p:last-child,
.insight-box p:last-child {
    margin-bottom: 0;
}

.framework-table {
    width: 100%;
    margin: 32px 0 40px;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.framework-table th,
.framework-table td {
    padding: 15px 14px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.framework-table th {
    color: var(--gold);
    background: var(--surface);
    font-family: var(--display);
    font-size: 0.73rem;
    text-transform: uppercase;
}

.framework-table td:first-child {
    color: var(--ink);
    font-weight: 800;
}

.checklist {
    padding: 0;
    list-style: none;
}

.checklist li {
    padding: 13px 0 13px 28px;
    position: relative;
    border-bottom: 1px solid var(--line);
}

.checklist li::before {
    content: "";
    width: 11px;
    height: 11px;
    position: absolute;
    top: 1.38em;
    left: 0;
    border: 1px solid var(--gold);
}

.source-box {
    margin-top: 64px;
    border-top: 1px solid var(--line);
    background: transparent;
}

.source-box h2 {
    font-size: 1.35rem;
}

.source-box ul {
    margin: 0;
    padding-left: 20px;
}

.source-box li {
    color: var(--muted);
    font-size: 0.84rem;
}

.universe-note {
    margin-top: 54px;
    padding: 25px 0;
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 28px;
    border-top: 1px solid var(--gold);
    border-bottom: 1px solid var(--line);
}

.universe-note span {
    color: var(--gold);
    font-size: 0.69rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.universe-note p {
    color: var(--muted);
    font-size: 0.9rem;
}

.related {
    padding: 86px 0;
    border-top: 1px solid var(--line);
    background: #0d0d0f;
}

.related h2 {
    margin-bottom: 34px;
    font-size: clamp(2rem, 4vw, 3.5rem);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.related-card {
    min-height: 190px;
    padding: 26px;
    border: 1px solid var(--line);
    background: var(--surface);
    transition: border-color 180ms ease, transform 180ms ease;
}

.related-card:hover {
    border-color: var(--gold);
    transform: translateY(-3px);
}

.related-card span {
    display: block;
    margin-bottom: 20px;
    color: var(--gold);
    font-size: 0.69rem;
    font-weight: 900;
    text-transform: uppercase;
}

.related-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.related-card p {
    color: var(--muted);
    font-size: 0.88rem;
}

.article-cta {
    padding: 90px 0;
    text-align: center;
    border-top: 1px solid var(--line);
}

.article-cta h2 {
    max-width: 840px;
    margin: 0 auto 20px;
    font-size: clamp(2.3rem, 5vw, 4.8rem);
}

.article-cta p {
    max-width: 680px;
    margin: 0 auto 30px;
    color: var(--muted);
}

.cta-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 19px;
    border: 1px solid var(--line);
    border-radius: 4px;
    font-family: var(--display);
    font-size: 0.77rem;
    font-weight: 900;
    text-transform: uppercase;
}

.button.primary {
    color: #080808;
    border-color: var(--gold);
    background: var(--gold);
}

.button.secondary:hover {
    border-color: var(--gold);
    color: var(--gold);
}

.article-footer {
    padding: 30px 0;
    color: var(--muted);
    border-top: 1px solid var(--line);
    font-size: 0.8rem;
}

.article-footer .container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 18px;
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .hero-tool {
        max-width: 530px;
    }

    .article-shell {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .article-rail {
        position: static;
        padding-bottom: 24px;
        border-bottom: 1px solid var(--line);
    }

    .article-rail ol {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0 24px;
    }

    .rail-book {
        display: none;
    }
}

@media (max-width: 640px) {
    .nav-links a:not(.nav-cta) {
        display: none;
    }

    .article-hero {
        padding: 58px 0 49px;
    }

    h1 {
        font-size: clamp(2.55rem, 13vw, 4rem);
    }

    .article-shell {
        padding-top: 46px;
    }

    .article-rail ol {
        grid-template-columns: 1fr;
    }

    .framework-table {
        display: block;
        overflow-x: auto;
    }

    .insight-box,
    .action-box,
    .source-box {
        padding: 23px 20px;
    }

    .universe-note {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}