/* Shared styles for LinkLyst's sub-pages (articles, comparisons, changelog).
   index.html keeps its own inline styles; this file carries the same tokens so
   the two stay visually identical. Change a token here and there together. */

@font-face {
    font-family: 'Geist';
    src: url('/fonts/geist-latin-variable.woff2') format('woff2-variations');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
        U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193,
        U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    --color-vermillion-signal: #e42b0c;
    --color-vermillion-deep: #b8220a;
    --color-carbon: #1f1f1f;
    --color-slate-900: #101828;
    --color-slate-700: #364153;
    --color-slate-600: #4a5565;
    --color-steel: #676767;
    --color-mist: #99a1af;
    --color-cloud: #d4d4d4;
    --color-frost: #e5e7eb;
    --color-paper: #ffffff;
    --color-vellum: #f5f5f5;

    --font-grotesk: 'Geist', 'Söhne', Inter, ui-sans-serif, system-ui, -apple-system,
        BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --text-micro: 12px;
    --text-caption: 14px;
    --text-body-sm: 16px;
    --text-body: 18px;
    --text-body-lg: 20px;
    --text-subheading: 24px;
    --text-heading-sm: 30px;
    --text-heading: 48px;

    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;

    --spacing-8: 8px;
    --spacing-16: 16px;
    --spacing-24: 24px;
    --spacing-32: 32px;
    --spacing-40: 40px;
    --spacing-48: 48px;
    --spacing-64: 64px;
    --spacing-80: 80px;

    --radius: 8px;
    --shadow-subtle: rgba(0, 0, 0, .1) 0 1px 3px 0, rgba(0, 0, 0, .1) 0 1px 2px -1px;
}

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

body {
    margin: 0;
    background: var(--color-vellum);
    color: var(--color-slate-900);
    font-family: var(--font-grotesk);
    font-size: var(--text-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.skip {
    position: absolute;
    left: -9999px;
}

.skip:focus {
    left: var(--spacing-16);
    top: var(--spacing-16);
    z-index: 20;
    padding: 12px 16px;
    background: var(--color-carbon);
    color: var(--color-paper);
    border-radius: var(--radius);
}

:focus-visible {
    outline: 2px solid var(--color-vermillion-signal);
    outline-offset: 2px;
}

/* ---------- Layout ---------- */

.shell {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--spacing-24);
}

.prose-shell {
    max-width: 760px;
    margin-inline: auto;
    padding-inline: var(--spacing-24);
}

/* ---------- Nav ---------- */

.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-frost);
}

.nav-inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-24);
    max-width: 1200px;
    margin-inline: auto;
    padding: var(--spacing-8) var(--spacing-24);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-8);
    font-size: var(--text-body-lg);
    font-weight: var(--weight-semibold);
    letter-spacing: -.02em;
    color: var(--color-slate-900);
    text-decoration: none;
}

.wordmark img { width: 28px; height: 28px; }

.nav-links {
    display: flex;
    gap: var(--spacing-24);
    margin: 0 0 0 auto;
    padding: 0;
    list-style: none;
}

.nav-links a {
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    color: var(--color-slate-600);
    text-decoration: none;
}

.nav-links a:hover { color: var(--color-slate-900); }

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-8);
    min-height: 44px;
    padding: 12px 24px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    letter-spacing: .025em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
}

.btn svg { flex: none; }

.btn-signal {
    background: var(--color-vermillion-signal);
    color: var(--color-paper);
    padding: 16px 24px;
    font-size: var(--text-body-sm);
}

.btn-signal:hover, .btn-signal:focus-visible {
    background: var(--color-vermillion-deep);
    color: var(--color-paper);
}

.btn-carbon {
    background: var(--color-carbon);
    color: var(--color-paper);
}

.btn-carbon:hover, .btn-carbon:focus-visible { background: #000; }

/* ---------- Prose ---------- */

.page-head {
    padding-block: var(--spacing-64) var(--spacing-32);
}

.eyebrow {
    display: block;
    margin-bottom: var(--spacing-16);
    font-size: var(--text-micro);
    font-weight: var(--weight-semibold);
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--color-vermillion-signal);
}

h1 {
    margin: 0 0 var(--spacing-24);
    font-size: var(--text-heading);
    line-height: 1.1;
    letter-spacing: -.03em;
    font-weight: var(--weight-semibold);
}

.lede {
    margin: 0;
    font-size: var(--text-body-lg);
    color: var(--color-slate-700);
}

.prose {
    padding: var(--spacing-48) var(--spacing-48) var(--spacing-64);
    background: var(--color-paper);
    border: 1px solid var(--color-frost);
    border-radius: var(--radius);
    box-shadow: var(--shadow-subtle);
}

.prose > :first-child { margin-top: 0; }
.prose > :last-child { margin-bottom: 0; }

.prose h2 {
    margin: var(--spacing-48) 0 var(--spacing-16);
    font-size: var(--text-heading-sm);
    line-height: 1.25;
    letter-spacing: -.02em;
    font-weight: var(--weight-semibold);
}

.prose h3 {
    margin: var(--spacing-32) 0 var(--spacing-8);
    font-size: var(--text-subheading);
    line-height: 1.3;
    letter-spacing: -.01em;
    font-weight: var(--weight-semibold);
}

.prose p, .prose ul, .prose ol {
    margin: 0 0 var(--spacing-24);
    color: var(--color-slate-700);
}

.prose li { margin-bottom: var(--spacing-8); }
.prose strong { color: var(--color-slate-900); font-weight: var(--weight-semibold); }
.prose a { color: var(--color-slate-900); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--color-vermillion-signal); }

/* The `.cta` block sits inside `.prose`, so `.prose a` (0,1,1) outranks
   `.btn-signal` (0,1,0) and paints the install buttons slate-with-underline —
   dark text on vermillion, and invisible on carbon. Buttons carry their own
   colour, so opt them out. `:hover` needs its own line because `.prose a:hover`
   outranks `.btn-signal:hover` for the same reason. */
.prose a.btn { text-decoration: none; }
.prose a.btn-signal, .prose a.btn-signal:hover,
.prose a.btn-outline-paper, .prose a.btn-outline-paper:hover { color: var(--color-paper); }

.prose code {
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--color-vellum);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: .88em;
    color: var(--color-slate-900);
}

.prose kbd {
    padding: 2px 6px;
    border: 1px solid var(--color-cloud);
    border-bottom-width: 2px;
    border-radius: 4px;
    background: var(--color-vellum);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: .85em;
    color: var(--color-slate-900);
}

.prose figure { margin: var(--spacing-32) 0; }

.prose img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--color-frost);
    border-radius: var(--radius);
}

.prose figcaption {
    margin-top: var(--spacing-8);
    font-size: var(--text-caption);
    color: var(--color-steel);
}

.prose hr {
    margin: var(--spacing-48) 0;
    border: 0;
    border-top: 1px solid var(--color-frost);
}

.prose blockquote {
    margin: var(--spacing-32) 0;
    padding-left: var(--spacing-24);
    border-left: 3px solid var(--color-vermillion-signal);
    color: var(--color-slate-700);
}

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; margin-bottom: var(--spacing-24); }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-body-sm);
}

th, td {
    padding: 12px 16px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--color-frost);
    color: var(--color-slate-700);
}

th {
    font-size: var(--text-micro);
    font-weight: var(--weight-semibold);
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--color-slate-900);
    white-space: nowrap;
}

/* ---------- Callout ---------- */

.callout {
    margin: var(--spacing-32) 0;
    padding: var(--spacing-24);
    background: var(--color-vellum);
    border-radius: var(--radius);
    border-left: 3px solid var(--color-carbon);
}

.callout p:last-child { margin-bottom: 0; }

/* ---------- Closing CTA ---------- */

.cta {
    margin-top: var(--spacing-48);
    padding: var(--spacing-48);
    background: var(--color-carbon);
    border-radius: var(--radius);
    text-align: center;
}

.cta h2 {
    margin: 0 0 var(--spacing-16);
    font-size: var(--text-heading-sm);
    line-height: 1.2;
    letter-spacing: -.02em;
    color: var(--color-paper);
    font-weight: var(--weight-semibold);
}

.cta p {
    margin: 0 auto var(--spacing-32);
    max-width: 52ch;
    color: var(--color-cloud);
}

/* The two install buttons. `.cta` is centred text, so they would otherwise be
   separated by a single collapsed space.

   They stack rather than sitting side by side: the prose column leaves about
   518px inside `.cta` and the pair needs about 560, so a row would always wrap
   anyway. Stacking on purpose with matched widths reads as a design decision
   instead of a wrap accident, and it keeps Chrome as the primary action. */
.cta-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-16);
}

.cta-actions .btn { width: 100%; max-width: 300px; }

/* Secondary button for use inside `.cta`, which is carbon. `.btn-ghost` from
   index.html borrows slate text on paper and disappears here. */
.btn-outline-paper {
    background: transparent;
    border-color: var(--color-steel);
    color: var(--color-paper);
    padding: 16px 24px;
    font-size: var(--text-body-sm);
}

.btn-outline-paper:hover,
.btn-outline-paper:focus-visible {
    border-color: var(--color-paper);
    background: rgba(255, 255, 255, .08);
    color: var(--color-paper);
}

.cta .micro { display: block; margin-top: var(--spacing-16); color: var(--color-mist); font-size: var(--text-micro); }

/* ---------- Related links ---------- */

.related {
    margin-top: var(--spacing-48);
    padding-top: var(--spacing-32);
    border-top: 1px solid var(--color-frost);
}

.related h2 {
    margin: 0 0 var(--spacing-16);
    font-size: var(--text-micro);
    font-weight: var(--weight-semibold);
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--color-steel);
}

.related ul { margin: 0; padding: 0; list-style: none; }
.related li { margin-bottom: var(--spacing-8); }
.related a { color: var(--color-slate-900); font-weight: var(--weight-medium); text-decoration: none; }
.related a:hover { color: var(--color-vermillion-signal); text-decoration: underline; }

/* ---------- Footer ---------- */

.footer {
    margin-top: var(--spacing-80);
    padding-block: var(--spacing-48);
    background: var(--color-carbon);
    color: var(--color-cloud);
}

.footer .wordmark { color: var(--color-paper); }

.footer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-24);
    flex-wrap: wrap;
    padding-bottom: var(--spacing-24);
    border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.footer-links {
    display: flex;
    gap: var(--spacing-24);
    margin: 0;
    padding: 0;
    list-style: none;
    flex-wrap: wrap;
}

.footer-links a { color: var(--color-cloud); font-size: var(--text-caption); text-decoration: none; }
.footer-links a:hover { color: var(--color-paper); text-decoration: underline; }

.footer-fine {
    margin: var(--spacing-24) 0 0;
    max-width: 68ch;
    font-size: var(--text-micro);
    color: var(--color-mist);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
    .nav-links { display: none; }
}

@media (max-width: 720px) {
    h1 { font-size: var(--text-heading-sm); }
    .prose { padding: var(--spacing-32) var(--spacing-24) var(--spacing-40); }
    .cta { padding: var(--spacing-32) var(--spacing-24); }
    .page-head { padding-block: var(--spacing-40) var(--spacing-24); }
}