:root {
    color-scheme: dark;
    --page: #120d2b;
    --page-deep: #090514;
    --surface: rgba(25, 20, 40, 0.48);
    --surface-strong: rgba(25, 20, 40, 0.72);
    --ink: rgba(255, 255, 255, 0.94);
    --muted: #9ca3af;
    --quiet: #6b7280;
    --line: rgba(255, 255, 255, 0.1);
    --purple: #a855f7;
    --purple-strong: #9333ea;
    --cyan: #22d3ee;
    --pink: #ff007f;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

html.light {
    color-scheme: light;
    --page: #f8fafc;
    --page-deep: #e2e8f0;
    --surface: rgba(255, 255, 255, 0.46);
    --surface-strong: rgba(255, 255, 255, 0.74);
    --ink: rgba(15, 23, 42, 0.92);
    --muted: #64748b;
    --quiet: #94a3b8;
    --line: rgba(15, 23, 42, 0.1);
    --purple: #7c3aed;
    --purple-strong: #9333ea;
    --cyan: #0891b2;
    --pink: #db2777;
    --shadow: 0 24px 70px rgba(71, 50, 105, 0.14);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100%;
    margin: 0;
    overflow-x: hidden;
    overflow-y: auto;
    animation: none;
    background: var(--page-deep);
}

html.light body {
    background: #f8fafc;
}

main,
.site-nav,
.site-footer {
    position: relative;
    z-index: 1;
}

a {
    color: inherit;
}

a:focus-visible {
    outline: 3px solid rgba(167, 108, 255, 0.58);
    outline-offset: 4px;
    border-radius: 6px;
}

.shell {
    width: min(1160px, calc(100% - 2rem));
    margin: 0 auto;
}

/* ---------- site chrome ---------- */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid var(--line);
    background: rgba(9, 5, 20, 0.78);
    backdrop-filter: blur(18px) saturate(1.3);
    -webkit-backdrop-filter: blur(18px) saturate(1.3);
}

html.light .site-nav {
    background: rgba(255, 255, 255, 0.76);
}

.nav-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.72rem;
    font-weight: 760;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.brand img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    filter: drop-shadow(0 7px 18px rgba(147, 51, 234, 0.24));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.35rem;
}

.nav-links a {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 650;
    text-decoration: none;
    transition: color 160ms ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--ink);
}

/* ---------- article shell ---------- */

.story {
    padding: clamp(2.75rem, 6vw, 4.25rem) 0 6rem;
}

.story-grid {
    width: min(1160px, calc(100% - 2rem));
}

.article {
    min-width: 0;
    max-width: 38rem;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
}

/* ---------- article header ---------- */

.post-header {
    margin-bottom: clamp(2.25rem, 5vw, 3rem);
}

.kicker {
    margin: 0 0 0.9rem;
    color: var(--purple);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin-top: 0;
    letter-spacing: -0.02em;
}

h1 {
    margin-bottom: 1.1rem;
    font-size: clamp(2.05rem, 4.6vw, 3rem);
    font-weight: 700;
    line-height: 1.14;
    text-wrap: balance;
}

.standfirst {
    margin: 0;
    color: var(--muted);
    font-size: clamp(1.08rem, 2vw, 1.24rem);
    font-weight: 400;
    line-height: 1.62;
    text-wrap: pretty;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
    margin-top: 1.6rem;
    padding: 0.8rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    color: var(--quiet);
    font-size: 0.83rem;
    font-weight: 500;
}

/* ---------- body copy ---------- */

.article p,
.article li,
.article dd {
    font-size: 1.04rem;
    line-height: 1.72;
}

.article > p {
    margin: 0 0 1.45rem;
}

.article h2 {
    margin: 3.1rem 0 1rem;
    font-size: clamp(1.42rem, 2.6vw, 1.7rem);
    font-weight: 700;
    line-height: 1.25;
    scroll-margin-top: 6rem;
}

.article code {
    padding: 0.1em 0.34em;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.07);
    font-family: "SF Mono", ui-monospace, Menlo, monospace;
    font-size: 0.88em;
}

html.light .article code {
    background: rgba(15, 23, 42, 0.055);
}

.article strong {
    font-weight: 650;
}

.article a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: var(--purple);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.22em;
    transition: color 160ms ease;
}

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

/* ---------- figure ---------- */

/* Both captures are window-only shots: each carries its own rounded corners and
   drop shadow in an alpha channel, so neither needs a frame. The width runs a
   little wide to offset the transparent margin baked into the images. */
.figure-wide {
    width: min(52rem, calc(100vw - 4rem));
    margin: 2.4rem 50% 2.4rem;
    transform: translateX(-50%);
}

.figure-wide picture {
    display: block;
}

.figure-wide img {
    display: block;
    width: 100%;
    height: auto;
}

figcaption {
    max-width: 38rem;
    margin: 0.15rem auto 0;
    color: var(--quiet);
    font-size: 0.84rem;
    line-height: 1.55;
}

/* ---------- before / after ---------- */

.shift {
    margin: 2rem 0 2.4rem;
    padding: 1.4rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.shift dt {
    margin-bottom: 0.3rem;
    color: var(--quiet);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.shift dd {
    margin: 0 0 1.35rem;
    color: var(--muted);
}

.shift dd:last-of-type {
    margin-bottom: 0;
}

/* ---------- numbered lessons ---------- */

.lessons {
    margin: 1.6rem 0 2.2rem;
    padding-left: 1.4rem;
    list-style: decimal;
}

.lessons li {
    display: list-item;
}

.lessons li {
    margin-bottom: 1rem;
    padding-left: 0.35rem;
}

.lessons li:last-child {
    margin-bottom: 0;
}

.lessons li::marker {
    color: var(--purple);
    font-weight: 700;
}

/* ---------- footer ---------- */

.site-footer {
    border-top: 1px solid var(--line);
    background: rgba(9, 5, 20, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

html.light .site-footer {
    background: rgba(255, 255, 255, 0.8);
}

.footer-inner {
    min-height: 92px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    color: var(--quiet);
    font-size: 0.86rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.footer-links a {
    color: var(--muted);
    font-weight: 650;
    text-decoration: none;
}

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

@media (max-width: 640px) {
    .nav-inner {
        min-height: 64px;
    }

    .nav-links {
        display: none;
    }

    .article p,
    .article li,
    .article dd {
        font-size: 1rem;
    }

    .figure-wide {
        width: 100%;
        margin: 2.2rem 0 2.4rem;
        transform: none;
    }

    .footer-inner {
        padding: 1.5rem 0;
        align-items: flex-start;
        flex-direction: column;
    }
}

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

    * {
        transition-duration: 0.01ms !important;
    }
}