/* ══════════════════════════════════════════════════════════════════
   DIRECTION CONTRACT
   THESIS: every deck reads as a GitHub talk: neutral stage, one green
     hero, and the brand's speaker-card rail. Refuses per-deck gradient
     washes, gradient text and the generic blue/violet "AI keynote".
   OWN-WORLD: GitHub Black theme on every slide (#101411 stage, #171C18
     cards); the rail marks cover, dividers and closing. Mona Sans / Mona Sans Mono. 2px neutral rules,
     one 2px green rail line, contribution-graph cells as bullets and
     slide chrome. Copilot Purple only where Copilot or AI is the subject.
   STORY: the audience knows within one slide that this is a GitHub
     speaker, then reads the content without chrome competing.
   FIRST VIEWPORT: black cover; left rail with Invertocat and four green
     cells; big white Mona Sans title with the key phrase in green;
     speaker card anchored bottom-right under a green rule.
   FORM: brand-pinned (brand.github.com speaker card + layout system);
     no concept roll, the brief pinned the world.
   ══════════════════════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════════════════════
   GitHub slides theme: shared by every deck in /conferences
   Follows https://brand.github.com: Mona Sans, neutrals plus a single
   GitHub Green hero, Copilot Purple only for Copilot/AI moments.
   Load it LAST in <head>: it re-tokenises each deck's legacy CSS.
   Design contract: conferences/DESIGN.md
   ══════════════════════════════════════════════════════════════════ */

@font-face {
    font-family: 'Mona Sans';
    src: url('fonts/MonaSans-VF.woff2') format('woff2');
    font-weight: 200 900;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Mona Sans';
    src: url('fonts/MonaSans-Italic-VF.woff2') format('woff2');
    font-weight: 200 900;
    font-style: italic;
    font-display: swap;
}
@font-face {
    font-family: 'Mona Sans Mono';
    src: url('fonts/MonaSansMono-VF.woff2') format('woff2');
    font-weight: 200 800;
    font-style: normal;
    font-display: swap;
}

/* ── Tokens ─────────────────────────────────────────────────────────── */
:root {
    /* Brand primitives */
    --gh-green: #0FBF3E;
    --gh-green-1: #BFFFD1;
    --gh-green-3: #5FED83;
    --gh-green-5: #08872B;
    --gh-green-6: #0A241B;
    --gh-gray-1: #F2F5F3;
    --gh-gray-2: #E4EBE6;
    --gh-gray-3: #B6BFB8;
    --gh-gray-4: #909692;
    --gh-gray-5: #232925;
    --gh-gray-6: #101411;
    --gh-purple: #8534F3;
    --gh-purple-2: #B870FF;
    --gh-purple-5: #26115F;
    --gh-orange-2: #F08A3A;
    --gh-orange-4: #C53211;

    /* Roles: White theme (content slides) */
    /* Roles: Black theme (every slide) */
    --gh-bg: var(--gh-gray-6);
    --gh-surface: #171C18;              /* cards, one step above the stage */
    --gh-subtle-bg: #1C221E;
    --gh-text: #FFFFFF;
    --gh-text-body: #C9D1CB;            /* 12.6:1 on #101411 */
    --gh-text-subtle: #96A199;          /* 7.0:1 */
    --gh-accent-text: var(--gh-green);  /* 7.6:1 */
    --gh-purple-text: var(--gh-purple-2); /* 6.0:1 */
    --gh-orange-text: var(--gh-orange-2); /* 7.4:1 */
    --gh-border: #2C342E;
    --gh-border-strong: #434C45;

    --gh-font: 'Mona Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    --gh-mono: 'Mona Sans Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    --gh-radius: 12px;
    --gh-rule: 2px;

    /* Legacy deck tokens, remapped onto the brand */
    --ink: var(--gh-text);
    --ink-soft: var(--gh-text-body);
    --muted: var(--gh-text-subtle);
    --line: var(--gh-border);
    --track: var(--gh-border);
    --surface: var(--gh-surface);
    --blue: var(--gh-accent-text);
    --emerald: var(--gh-accent-text);
    --indigo: var(--gh-text);
    --teal: var(--gh-text-body);
    --cyan: var(--gh-text-body);
    --violet: var(--gh-purple-text);
    --amber: var(--gh-orange-text);
    --rose: var(--gh-orange-text);
    --radius: var(--gh-radius);
    --shadow: none;
    --shadow-sm: none;
    --grad: var(--gh-gray-5);
    --grad-night: var(--gh-gray-5);
    --grad-dawn: var(--gh-gray-5);
    --grad-green: var(--gh-green-6);
    --track-display: -.015em;
    --track-title: -.005em;
    --track-label: .02em;

    /* code-generation deck tokens */
    --primary: var(--gh-accent-text);
    --primary-dark: var(--gh-text-body);
    --primary-light: var(--gh-subtle-bg);
    --accent-green: var(--gh-accent-text);
    --accent-amber: var(--gh-orange-text);
    --accent-purple: var(--gh-purple-text);
    --accent-rose: var(--gh-orange-text);
    --text-primary: var(--gh-text);
    --text-secondary: var(--gh-text-subtle);
    --bg-light: var(--gh-subtle-bg);
    --border: var(--gh-border);
    --shadow-md: none;
    --shadow-lg: none;
}

/* ── Stage ──────────────────────────────────────────────────────────── */
.reveal-viewport,
.reveal-viewport body { background: var(--gh-bg); }
.reveal {
    font-family: var(--gh-font);
    font-optical-sizing: auto;
    color: var(--gh-text);
    font-feature-settings: 'liga' 0;
}
.reveal .slides section { font-family: var(--gh-font); }

/* Headings: sentence case, Mona Sans' optical sizing does the tracking */
.reveal h1, .reveal h2, .reveal h3, .reveal h4, .reveal h5, .reveal h6 {
    font-family: var(--gh-font);
    text-transform: none;
    color: var(--gh-text);
    text-shadow: none;
    text-wrap: balance;
}
.reveal h1 { font-weight: 500; letter-spacing: var(--track-display); line-height: 1.02; }
.reveal h2 {
    font-weight: 500;
    letter-spacing: var(--track-title);
    line-height: 1.12;
    border-bottom: var(--gh-rule) solid var(--gh-border);
    border-image: none;
}
.reveal h3 { font-weight: 600; color: var(--gh-text); letter-spacing: 0; }
.reveal .slides section.speaker-bio {
    --speaker-ink: var(--gh-text);
    --speaker-text: var(--gh-text-body);
    --speaker-accent: var(--gh-green);
    --speaker-line: var(--gh-border);
    font-family: var(--gh-font);
}
.reveal .speaker-bio ul li::before { border-radius: 2px; }
.reveal .speaker-bio h2 { border-bottom: var(--gh-rule) solid var(--gh-border); font-weight: 500; }

/* Emphasis is weight + GitHub Green, never gradient text */
.grad, .reveal .grad {
    background: none;
    -webkit-background-clip: border-box;
    background-clip: border-box;
    -webkit-text-fill-color: currentColor;
    color: var(--gh-accent-text);
}
.reveal.has-dark-background .grad,
.gh-dark .grad { color: var(--gh-green); }

.reveal a { color: var(--gh-accent-text); }
.reveal a:focus-visible { outline: 3px solid var(--gh-green); outline-offset: 4px; }

/* ── Lists: contribution-graph cell bullets ─────────────────────────── */
.reveal ul li::before {
    content: '';
    background: var(--gh-green);
    border-radius: 2px;
    width: .42em;
    height: .42em;
    top: .66em;
}
.reveal ul.compact li::before { top: .56em; }

/* ── Containers: flat, 2px neutral borders ──────────────────────────── */
.card,
.agent,
.org-node,
.sig-item,
.arch-layer {
    background: var(--gh-bg);
    border: var(--gh-rule) solid var(--gh-border);
    border-radius: var(--gh-radius);
    box-shadow: none;
}
.card.t-blue, .card.t-emerald { border-top: var(--gh-rule) solid var(--gh-green); }
.card.t-violet { border-top: var(--gh-rule) solid var(--gh-purple); }
.card.t-amber, .card.t-rose { border-top: var(--gh-rule) solid var(--gh-orange-4); }
.card.t-indigo, .card.t-teal, .card.t-cyan { border-top: var(--gh-rule) solid var(--gh-gray-5); }
.card.t-blue h3, .card.t-emerald h3 { color: var(--gh-accent-text); }
.card.t-teal h3, .card.t-cyan h3, .card.t-indigo h3 { color: var(--gh-text); }

.detail-demote .card { border-top: var(--gh-rule) solid var(--gh-border); background: var(--gh-subtle-bg); }
.detail-demote .bar-fill { background: var(--gh-gray-3); }

.feat,
.arch-layer.core {
    background: var(--gh-subtle-bg);
    border: var(--gh-rule) solid var(--gh-border);
    color: var(--gh-text-subtle);
}
.arch-layer.top { background: var(--gh-gray-6); border-color: var(--gh-gray-6); }
.arch-tie { color: var(--gh-accent-text); }

/* ── Labels: chips, tags, pills in Mona Sans Mono ───────────────────── */
.chip,
.tag,
.repo-pill,
.agent .pill,
.shot-eyebrow {
    font-family: var(--gh-mono);
    font-weight: 500;
    letter-spacing: 0;
    border-radius: 6px;
    background: var(--gh-subtle-bg);
    color: var(--gh-text-body);
    border: 1px solid var(--gh-border);
}
.chip.blue, .tag.green, .agent .pill { background: #EAFBEF; color: var(--gh-green-5); border-color: var(--gh-green-1); }
.chip.teal, .chip.slate, .tag.slate { background: var(--gh-subtle-bg); color: var(--gh-text-body); border-color: var(--gh-border); }
.tag.amber, .tag.rose { background: #FFF1EC; color: var(--gh-orange-4); border-color: #F9D3C6; }
.agent .pill.run, .shot-eyebrow { background: #F4EDFE; color: var(--gh-purple); border-color: #DEC8FD; }
.banner .repo-pill { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.2); }

/* ── Solid banners (no gradients, no glow) ──────────────────────────── */
.banner,
.banner.night,
.banner.dawn,
.banner.sunrise { background: var(--gh-gray-6); box-shadow: none; }
.banner.green { background: var(--gh-green-6); }
.banner.sunrise { background: var(--gh-purple-5); }
.banner b, .banner strong { color: var(--gh-green) !important; }
.banner.sunrise b, .banner.sunrise strong { color: #FFFFFF !important; }

/* ── Code ───────────────────────────────────────────────────────────── */
.snippet,
.codeblock {
    font-family: var(--gh-mono);
    background: var(--gh-gray-6);
    color: #E6EDE8;
    box-shadow: none;
    border-radius: var(--gh-radius);
}
.snippet .k, .codeblock .k { color: var(--gh-green-3); }
.codeblock .s { color: var(--gh-green-1); }
.snippet .c, .codeblock .c { color: var(--gh-gray-4); }

/* ── Numbers ────────────────────────────────────────────────────────── */
.stat-num,
.stat-inline { font-family: var(--gh-font); font-weight: 500; letter-spacing: -.01em; font-variant-numeric: normal; }

/* ── Org chart / thesis ─────────────────────────────────────────────── */
.thesis-lede, .thesis-close { font-family: var(--gh-font); font-weight: 500; letter-spacing: 0; }
.thesis-close .win { color: var(--gh-accent-text); }
.org-mgr { background: var(--gh-gray-6); box-shadow: none; font-weight: 600; }
.org-fan path { stroke: var(--gh-gray-3); }
.org-node .role { font-weight: 600; }
.org-node.r-blue .role, .org-node.r-emerald .role { color: var(--gh-accent-text); }
.org-node.r-teal .role { color: var(--gh-text); }

/* ── Timeline ───────────────────────────────────────────────────────── */
.tl-band { background: var(--gh-subtle-bg); border: var(--gh-rule) dashed var(--gh-gray-3); }
.tl-band-label { color: var(--gh-text-subtle); font-family: var(--gh-font); font-weight: 500; }
.tl-dots::before { background: var(--gh-gray-3); height: 2px; }
.tl-dot { background: var(--gh-green); box-shadow: 0 0 0 4px #FFFFFF, 0 0 0 6px var(--gh-green); }
.tl-dot.night { background: var(--gh-purple); box-shadow: 0 0 0 4px #FFFFFF, 0 0 0 6px var(--gh-purple); }
.tl-dot.dawn { background: var(--gh-orange-4); box-shadow: 0 0 0 4px #FFFFFF, 0 0 0 6px var(--gh-orange-4); }
.tl-dot.ship { background: var(--gh-gray-6); box-shadow: 0 0 0 4px #FFFFFF, 0 0 0 6px var(--gh-gray-6); }
.tl-times > span { font-family: var(--gh-mono); font-weight: 500; }

/* ── Charts ─────────────────────────────────────────────────────────── */
.bar-track { background: var(--gh-gray-2); border-radius: 3px; }
.bar-fill { background: var(--gh-green); border-radius: 3px; }

/* ── Tables ─────────────────────────────────────────────────────────── */
.dtable thead th { font-family: var(--gh-font); font-weight: 600; text-transform: none; letter-spacing: 0; border-bottom: var(--gh-rule) solid var(--gh-gray-6); }
.dtable td.num { font-family: var(--gh-mono); font-weight: 500; }
.dtable tr.total td { background: var(--gh-subtle-bg); border-top: var(--gh-rule) solid var(--gh-gray-6); }

/* ── Recipe ingredient marker: a single contribution cell ───────────── */
.ingredient .ix { background: var(--gh-gray-6); color: var(--gh-green); border-radius: 8px; box-shadow: none; font-weight: 600; }
.ingredient .ix-label { font-family: var(--gh-mono); font-weight: 500; letter-spacing: .04em; }

/* ── Screenshots ────────────────────────────────────────────────────── */
.reveal section img.shot { border: var(--gh-rule) solid var(--gh-border); box-shadow: none; }

/* ── Quizzes / verdict charts ───────────────────────────────────────── */
.quiz-section .quiz-choice { border-width: var(--gh-rule); }
.quiz-section .quiz-letter { color: var(--gh-text); font-family: var(--gh-mono); font-weight: 600; }
.quiz-section .quiz-answer { background: #EAFBEF; border-color: var(--gh-green); }
.quiz-section:has(.quiz-answer.visible) .quiz-correct { background: #EAFBEF; border-color: var(--gh-green); }
#verdict .verdict-ai { fill: var(--gh-green); }
#verdict figcaption { font-family: var(--gh-font); font-weight: 600; }

/* ── Dark slides (Black theme) ──────────────────────────────────────── */
.reveal .slides section.gh-dark,
.reveal .slides section.night-slide { color: #FFFFFF; }
.gh-dark h1, .gh-dark h2, .gh-dark h3,
.night-slide h2 { color: #FFFFFF; }
.night-slide h2 { border-bottom-color: var(--gh-gray-5); }
.night-slide h2 .muted,
.night-slide > .txt-sm.muted,
.night-slide .txt-sm.muted,
.night-slide .txt-xs.muted { color: #96A199 !important; }
.night-slide .muted .ink, .night-slide > .txt-sm.muted .ink { color: #FFFFFF; }
.night-slide .agent,
.night-slide .card {
    background: var(--gh-gray-5);
    border-color: #343C37;
    box-shadow: none;
}
.night-slide .agent .who, .night-slide .card h3, .night-slide .card .ink { color: #FFFFFF; }
.night-slide .agent .task, .night-slide .card li, .night-slide .card p { color: #C9D1CB; }
.night-slide .proof { background: var(--gh-gray-5); border: 1px solid #343C37; color: #C9D1CB; }
.night-slide .proof b { color: #FFFFFF; }
.night-slide .violet { color: var(--gh-purple-2); }
.night-slide .blue, .night-slide .emerald { color: var(--gh-green); }
.night-slide .amber { color: var(--gh-orange-2); }
.night-slide .agent .pill { background: var(--gh-green-6); color: var(--gh-green-3); border-color: #174A30; }
.night-slide .agent .pill.run { background: #1E0E4A; color: #C898FD; border-color: #3B1F7A; }
.night-slide .banner.sunrise { background: var(--gh-purple); }

/* ── Deck chrome ────────────────────────────────────────────────────── */
.reveal .slide-number {
    font-family: var(--gh-mono);
    font-size: 14px;
    color: var(--gh-text-subtle);
    background: transparent;
    left: 94px;
    right: auto;
    bottom: 15px;
    padding: 0;
}
.reveal.has-dark-background .slide-number { color: #96A199; }
.reveal .progress { color: var(--gh-green); background-color: rgba(16,20,17,.08); height: 4px; }
.reveal .controls { color: var(--gh-green-5); }
.reveal.has-dark-background .controls { color: var(--gh-green); }

/* Light branding on every slide: four contribution cells, bottom-left */
.reveal::after {
    content: '';
    position: absolute;
    left: 22px;
    bottom: 18px;
    width: 58px;
    height: 10px;
    z-index: 30;
    pointer-events: none;
    background:
        linear-gradient(var(--gh-green-1), var(--gh-green-1)) 0 0 / 10px 10px no-repeat,
        linear-gradient(var(--gh-green-3), var(--gh-green-3)) 16px 0 / 10px 10px no-repeat,
        linear-gradient(var(--gh-green), var(--gh-green)) 32px 0 / 10px 10px no-repeat,
        linear-gradient(var(--gh-green-5), var(--gh-green-5)) 48px 0 / 10px 10px no-repeat;
}
.reveal:has(.slides > section.present.gh-full)::after { display: none; }

/* ══════════════════════════════════════════════════════════════════
   Rail layout: covers, section dividers, closing slides.
   Brand speaker-card grammar: a logo rail, one 2px green rule,
   text on neutral black, details anchored to the edges.
   ══════════════════════════════════════════════════════════════════ */
.reveal .slides > section.gh-full {
    height: 100%;
    padding: 0 !important;
    top: 0 !important;
    text-align: left;
}
.gh-frame {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-columns: 184px 1fr;
    color: #FFFFFF;
}
.gh-rail {
    border-right: var(--gh-rule) solid var(--gh-green);
    padding: 56px 0 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}
.reveal .gh-mark { width: 72px; height: 72px; margin: 0; display: block; }
.gh-cells { display: grid; gap: 10px; }
.gh-cells i {
    display: block;
    width: 72px;
    height: 72px;
    border-radius: 14px;
    background: var(--gh-green);
}
.gh-cells i:nth-child(1) { background: var(--gh-green-6); }
.gh-cells i:nth-child(2) { background: var(--gh-green-5); }
.gh-cells i:nth-child(3) { background: var(--gh-green); }
.gh-cells i:nth-child(4) { background: var(--gh-green-3); }
.gh-cells.is-copilot i:nth-child(4) { background: var(--gh-purple); }

.gh-main {
    padding: 56px 64px 48px 56px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.reveal .gh-main h1 {
    color: #FFFFFF;
    font-size: 2.9em;
    font-weight: 500;
    line-height: 1;
    margin: 0;
    max-width: 16ch;
}
.reveal .gh-main h1 .grad,
.reveal .gh-main h1 em { color: var(--gh-green); font-style: normal; }
.reveal .gh-lede {
    margin: .7em 0 0;
    font-size: .92em;
    font-weight: 500;
    line-height: 1.3;
    color: #FFFFFF;
    max-width: 30ch;
    text-wrap: balance;
}
.reveal .gh-sub {
    margin: .45em 0 0;
    font-size: var(--t-sm, .6em);
    line-height: 1.45;
    color: #96A199;
    max-width: 44ch;
}
.gh-foot {
    margin-top: auto;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2em;
}
.gh-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .5em 1.2em;
    font-family: var(--gh-mono);
    font-size: 15px;
    color: #96A199;
    list-style: none;
    margin: 0;
    padding: 0;
}
.gh-tags li::before { display: none; }
.gh-tags li { font-size: 15px !important; padding: 0 !important; color: #96A199 !important; }
.gh-tags li:first-child { color: var(--gh-green) !important; }

.gh-speaker {
    display: grid;
    grid-template-columns: 64px auto;
    gap: 16px;
    align-items: center;
    padding-top: 16px;
    border-top: var(--gh-rule) solid var(--gh-green);
    min-width: 340px;
}
.reveal .gh-speaker img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 8px;
    filter: grayscale(1);
    margin: 0;
}
.gh-speaker .nm { font-size: 18px; font-weight: 600; color: #FFFFFF; line-height: 1.25; }
.gh-speaker .rl { font-size: 15px; color: #96A199; line-height: 1.35; }
.gh-speaker .ln { font-family: var(--gh-mono); font-size: 14px; color: #96A199; line-height: 1.35; margin-top: 2px; }

.reveal .gh-main h1 .gh-dim { color: #96A199; }
.reveal .gh-links { margin: 0; font-family: var(--gh-mono); font-size: 15px; color: #96A199; }

/* Section divider */
.gh-num {
    font-family: var(--gh-font);
    font-size: 64px;
    font-weight: 500;
    line-height: 1;
    color: var(--gh-green);
}
.gh-divider .gh-main { justify-content: center; }
.gh-divider .gh-main h1 { font-size: 2.4em; max-width: 18ch; }
.gh-divider .gh-foot { margin-top: 0; position: absolute; left: 240px; right: 64px; bottom: 48px; }
.gh-part { font-family: var(--gh-mono); font-size: 15px; color: #96A199; }
.reveal .gh-divider .gh-divider-sub { font-size: .8em; color: #C9D1CB; max-width: 40ch; }
.gh-divider .gh-main > p.txt-sm { color: #96A199 !important; }
.gh-divider .sig { margin-top: 1.2em; }
.gh-divider .sig-item { background: var(--gh-gray-5); border-color: #343C37; }
.gh-divider .sig-item .st { color: #FFFFFF; }
.gh-divider .sig-item .sd { color: #C9D1CB; }

/* Closing */
.gh-closing .gh-main { justify-content: center; }
.gh-closing-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 64px;
    align-items: center;
}
.reveal .gh-closing h2 {
    color: #FFFFFF;
    border: 0;
    font-size: 2em;
    line-height: 1.05;
    margin: 0 0 .4em;
    padding: 0;
}
.reveal .gh-closing p { color: #96A199; font-size: var(--t-body, .7em); line-height: 1.45; margin: 0; max-width: 32ch; }
.gh-closing .gh-url { display: inline-block; margin-top: 1.2em; font-family: var(--gh-mono); font-size: 18px; color: var(--gh-green); text-decoration: none; }
.gh-qr {
    margin: 0;
    padding: 18px;
    background: #FFFFFF;
    border-radius: var(--gh-radius);
    line-height: 0;
}
.reveal .gh-qr img { width: 300px; height: 300px; margin: 0; display: block; }

@media (prefers-reduced-motion: reduce) {
    .reveal .slides section,
    .reveal .slides section * { transition-duration: 0s !important; animation: none !important; }
}

/* Three-up recap on a dark closing slide */
.gh-trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 1.1em; max-width: 900px; }
.gh-trio .feat { background: var(--gh-gray-5); border-color: #343C37; color: #C9D1CB; }
.gh-trio .feat b { color: #FFFFFF; }
.gh-trio .mono { color: var(--gh-green); }
.gh-outro .gh-foot { gap: 1.5em; }

/* Inline emphasis classes keep contrast on Black slides */
.gh-full .ink, .night-slide .ink { color: #FFFFFF; }
.gh-full .muted { color: #96A199; }

/* ══════════════════════════════════════════════════════════════════
   code-generation deck vocabulary
   ══════════════════════════════════════════════════════════════════ */
.reveal ul li::before { position: absolute; left: 0; }
.reveal ul.white-list li { color: #C9D1CB; }
.reveal ul.white-list li strong { color: #FFFFFF; }
.box-blue, .box-dark { background: var(--gh-gray-6); }
.box-green { background: var(--gh-green-6); }
.box-amber { background: var(--gh-orange-4); }
.box-purple { background: var(--gh-purple); }
.box-blue strong, .box-dark strong, .box-green strong { color: var(--gh-green) !important; }
.tag-green { background: #EAFBEF; color: var(--gh-green-5); border-color: var(--gh-green-1); }
.tag-amber { background: #FFF1EC; color: var(--gh-orange-4); border-color: #F9D3C6; }
.tag-purple { background: #F4EDFE; color: var(--gh-purple); border-color: #DEC8FD; }
.badge-demo { background: var(--gh-green-5); font-family: var(--gh-mono); font-weight: 600; border-radius: 6px; }
.github-pill { background: var(--gh-gray-6); color: #E6EDE8 !important; font-family: var(--gh-mono); font-weight: 500; border-radius: 6px; }
.gh-conclusion .github-pill { background: var(--gh-gray-5); }
.quote {
    border-left: 0;
    padding-left: 0;
    font-family: var(--gh-mono);
    font-style: normal;
    color: var(--gh-accent-text);
}
.t-dot { background: var(--gh-green); border-radius: 3px; }
.tool-row { border-left: 1px solid rgba(255,255,255,.12); }
.float, .pulse { animation: none; }
.terminal-card { background: #0B0E0C; border: var(--gh-rule) solid var(--gh-gray-5); box-shadow: none; font-family: var(--gh-mono); }
.terminal-header { background: var(--gh-gray-5); border-bottom-color: #343C37; }
.terminal-dot { background: #4A534D !important; }
.terminal-title { color: #96A199; }
.terminal-prompt { color: var(--gh-green); }
.copy-btn { background: var(--gh-green-5); box-shadow: none; font-family: var(--gh-font); }
.copy-btn:hover { background: var(--gh-green); color: var(--gh-gray-6); box-shadow: none; }
.copy-btn.copied { background: var(--gh-green); color: var(--gh-gray-6); }
.copy-btn:focus-visible { outline: 3px solid var(--gh-green); outline-offset: 3px; }
.gh-conclusion .card { background: var(--gh-gray-5) !important; border: var(--gh-rule) solid #343C37 !important; }
.gh-conclusion img { filter: grayscale(1); border-color: var(--gh-green) !important; border-radius: 12px !important; }
.reveal .slides section.gh-dark h2 { color: #FFFFFF; border-bottom-color: var(--gh-gray-5) !important; }
.reveal .slides section[data-background-color="#101411"] > h2 { border-bottom-color: var(--gh-gray-5) !important; }

/* code-generation conclusion inside the rail */
.gh-conclusion .gh-main { padding-top: 48px; justify-content: center; }
.reveal .gh-conclusion h2 { color: #FFFFFF; font-size: 1.6em; border: 0; margin: 0 0 .5em; padding: 0; }

/* Stats: green or ink only; purple/orange stay for Copilot and warnings */
.stat-num.violet, .stat-num.amber, .stat-num.teal, .stat-num.cyan, .stat-num.indigo { color: var(--gh-text); }

/* Quieter navigation chrome */
.reveal .controls { color: var(--gh-gray-3); }
.reveal.has-dark-background .controls { color: #5F6B63; }
.card:has(.stat-num).t-violet, .card:has(.stat-num).t-amber, .card:has(.stat-num).t-rose { border-top-color: var(--gh-gray-5); }
.reveal:has(.slides > section.present.gh-full) .slide-number { left: 216px; }

/* ══════════════════════════════════════════════════════════════════
   Black theme: every slide sits on the GitHub black stage.
   Components that assumed a white page are re-toned here.
   ══════════════════════════════════════════════════════════════════ */
.reveal-viewport { background: var(--gh-bg) !important; }
.reveal ul li { color: var(--gh-text-body); }
.reveal .slide-number { color: var(--gh-text-subtle); }
.reveal .controls { color: #5F6B63; }
.reveal .progress { background-color: rgba(255,255,255,.08); }

.card, .agent, .org-node, .sig-item, .arch-layer { background: var(--gh-surface); border-color: var(--gh-border); }
.card.t-indigo, .card.t-teal, .card.t-cyan,
.card:has(.stat-num).t-violet, .card:has(.stat-num).t-amber, .card:has(.stat-num).t-rose { border-top-color: var(--gh-border-strong); }
.card.t-violet { border-top-color: var(--gh-purple); }
.card.t-amber, .card.t-rose { border-top-color: var(--gh-orange-2); }
.feat, .arch-layer.core, .detail-demote .card { background: var(--gh-subtle-bg); border-color: var(--gh-border); color: var(--gh-text-subtle); }
.detail-demote .bar-fill { background: var(--gh-border-strong); }
.arch-layer.top { background: var(--gh-gray-5); border-color: var(--gh-green); }

/* Labels on black: deep tints, light text */
.chip, .tag, .repo-pill, .chip.teal, .chip.slate, .tag.slate { background: var(--gh-subtle-bg); color: var(--gh-text-body); border-color: var(--gh-border); }
.chip.blue, .tag.green, .agent .pill, .tag-green { background: var(--gh-green-6); color: var(--gh-green-3); border-color: #174A30; }
.agent .pill.run, .shot-eyebrow, .tag-purple { background: #1E0E4A; color: #C898FD; border-color: #3B1F7A; }
.tag.amber, .tag.rose, .tag-amber { background: #2A1208; color: #F4A876; border-color: #5A2512; }

/* Emphasis blocks: a lifted panel, not black on black */
.banner, .banner.night, .banner.dawn,
.box-blue, .box-dark { background: var(--gh-gray-5); border: var(--gh-rule) solid #343C37; }
.banner.green, .box-green { background: var(--gh-green-6); border: var(--gh-rule) solid #174A30; }
.banner.sunrise, .box-purple { background: var(--gh-purple); border: 0; }
.org-mgr { background: #FFFFFF; color: var(--gh-gray-6); }
.ingredient .ix { background: var(--gh-gray-5); }

/* Code sits in a recessed well */
.snippet, .codeblock { background: #0B0E0C; border: var(--gh-rule) solid var(--gh-border); }

.tl-band { background: var(--gh-subtle-bg); border-color: var(--gh-border-strong); }
.tl-dots::before { background: var(--gh-border-strong); }
.tl-dot { box-shadow: 0 0 0 4px var(--gh-bg), 0 0 0 6px var(--gh-green); }
.tl-dot.night { background: var(--gh-purple-2); box-shadow: 0 0 0 4px var(--gh-bg), 0 0 0 6px var(--gh-purple-2); }
.tl-dot.dawn { background: var(--gh-orange-2); box-shadow: 0 0 0 4px var(--gh-bg), 0 0 0 6px var(--gh-orange-2); }
.tl-dot.ship { background: #FFFFFF; box-shadow: 0 0 0 4px var(--gh-bg), 0 0 0 6px #FFFFFF; }
.org-fan path { stroke: var(--gh-border-strong); }

.dtable thead th { border-bottom-color: var(--gh-text-body); }
.dtable tr.total td { background: var(--gh-subtle-bg); border-top-color: var(--gh-text-body); }

.quiz-section .quiz-answer,
.quiz-section:has(.quiz-answer.visible) .quiz-correct { background: var(--gh-green-6); }
.quiz-section .quiz-choice { background: var(--gh-surface); }

.closing-section .closing-app-qr img { background: #FFFFFF; }
.reveal section img.shot { border-color: var(--gh-border-strong); }
.github-pill { background: var(--gh-gray-5); }
.quote { color: var(--gh-accent-text); }
.copy-btn { color: var(--gh-gray-6); background: var(--gh-green); }
.copy-btn:hover { background: var(--gh-green-3); }