/* Decentralized AI: The Landscape - lab-specific styles
   Inherits /css/style.css (navy gradient body, fixed header, footer).
   Shares the editorial composition of the Semiconductor Stack lab
   (numbered sections, stack diagram, paper cards, POV blocks, custom
   tooltip) and extends it with project cards, an interactive filterable
   explorer, and a landscape map table. Navy gradient background, Aeonik
   display type, white paper cards with slate ink, orange accents. */

:root {
    --dai-navy: #1e3a8a;
    --dai-navy-deep: #162456;
    --dai-accent: #f97316;        /* orange-500 */
    --dai-accent-soft: #fdba74;
    --dai-positive: #15803d;
    --dai-on-navy-faint: rgba(255, 255, 255, 0.55);
    --dai-on-navy-soft: rgba(255, 255, 255, 0.75);
    --dai-on-navy-strong: rgba(255, 255, 255, 0.92);
    --dai-card-bg: #ffffff;
    --dai-card-bg-2: #fafafa;
    --dai-ink: #0a0a0a;
    --dai-ink-soft: #1f2937;
    --dai-ink-muted: #475569;
    --dai-ink-faint: #94a3b8;
    --dai-rule: rgba(15, 23, 42, 0.08);
    --dai-rule-strong: rgba(15, 23, 42, 0.16);
    --dai-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ============ HERO ============ */
.dai-hero {
    padding: 8rem 0 3rem;
    text-align: left;
}

.dai-hero-content {
    max-width: 1100px;
    margin: 0 auto;
}

.dai-eyebrow {
    display: inline-block;
    font-family: var(--dai-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    color: var(--dai-accent-soft);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.dai-title {
    font-size: clamp(2.5rem, 6.5vw, 5.2rem);
    font-weight: 300;
    line-height: 1.05;
    letter-spacing: -0.025em;
    color: #ffffff;
    max-width: 22ch;
    margin: 0 0 1.5rem;
}
.dai-title em {
    font-style: normal;
    color: var(--dai-accent-soft);
    font-weight: 400;
}

.dai-subtitle {
    font-size: clamp(1.05rem, 1.4vw, 1.25rem);
    font-weight: 400;
    line-height: 1.6;
    color: var(--dai-on-navy-soft);
    max-width: 64ch;
    margin: 0 0 2.5rem;
}
.dai-subtitle a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-subtitle a:hover { color: #ffffff; }

.dai-meta {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem 2.5rem;
    padding-top: 0.75rem;
    max-width: 64rem;
}
.dai-meta-item { display: flex; flex-direction: column; gap: 0.25rem; }
.dai-meta-key {
    font-family: var(--dai-mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    color: var(--dai-on-navy-faint);
    text-transform: uppercase;
}
.dai-meta-val {
    font-family: var(--dai-mono);
    font-size: 0.78rem;
    color: var(--dai-on-navy-strong);
    line-height: 1.4;
}

/* ============ TL;DR STRIP ============ */
.dai-tldr {
    padding: 3.5rem 0;
    background: rgba(255, 255, 255, 0.04);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(4px);
}
.dai-tldr-intro {
    font-family: var(--dai-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dai-on-navy-faint);
    margin-bottom: 1.75rem;
    text-align: center;
}
.dai-tldr-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
}
.dai-tldr-item {
    padding: 0.5rem 0.25rem;
    border-radius: 0.4rem;
    transition: transform 0.15s;
}
.dai-tldr-item:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.03);
}

.dai-stat {
    font-size: 3rem;
    font-weight: 300;
    color: #ffffff;
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 0.7rem;
}
.dai-stat em {
    font-style: normal;
    color: var(--dai-accent-soft);
    font-weight: 400;
}
.dai-stat-unit {
    font-size: 1.5rem;
    color: var(--dai-on-navy-soft);
    font-weight: 300;
    margin-left: 0.1em;
}

.dai-tldr-label {
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--dai-on-navy-soft);
}
.dai-tldr-label strong { color: #ffffff; font-weight: 500; }

/* ============ SUB-NAV ============ */
.dai-subnav {
    position: sticky;
    top: 72px;
    z-index: 40;
    background: rgba(30, 58, 138, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.65rem 0;
}
.dai-subnav-list {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.dai-subnav-list::-webkit-scrollbar { display: none; }
.dai-subnav-list li { flex: 0 0 auto; }
.dai-subnav-list a {
    display: inline-block;
    font-family: var(--dai-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dai-on-navy-soft);
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
    white-space: nowrap;
}
.dai-subnav-list a:hover { background: rgba(255, 255, 255, 0.08); color: #ffffff; }
.dai-subnav-list a.active { background: rgba(255, 255, 255, 0.12); color: #ffffff; }

/* ============ SCENE BASE ============ */
.dai-scene {
    padding: 5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    scroll-margin-top: 130px;
}
#stack, #culture, #training, #inference, #verification, #agents, #data, #compute, #commerce, #novel, #explorer, #map, #risks, #methodology { scroll-margin-top: 130px; }

.dai-section-label {
    font-family: var(--dai-mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    color: var(--dai-accent-soft);
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 1.25rem;
}
.dai-section-num { color: var(--dai-on-navy-faint); margin-right: 0.4rem; }

.dai-scene-h2 {
    font-size: clamp(1.85rem, 3.4vw, 2.85rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    font-weight: 300;
    color: #ffffff;
    margin: 0 0 1.4rem;
    max-width: 30ch;
}
.dai-scene-h2 em {
    font-style: normal;
    color: var(--dai-accent-soft);
    font-weight: 400;
}

.dai-lede {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--dai-on-navy-soft);
    margin: 0 0 1.5rem;
    max-width: 72ch;
}
.dai-lede a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-lede a:hover { color: #ffffff; }

/* ============ DIAGRAM CARD ============ */
.dai-diagram-wrap {
    margin-top: 2.5rem;
    padding: 2rem;
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}
.dai-diagram-wrap svg {
    display: block;
    margin: 0 auto;
    width: 100%;
    max-width: 1080px;
    height: auto;
}
.dai-diagram-legend {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}
.dai-diagram-legend .swatch {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    vertical-align: middle;
    margin-right: 0.4rem;
}

/* ============ POV BLOCK (on navy) ============ */
.dai-pov {
    margin: 2rem 0 0;
    padding: 1.5rem 1.6rem;
    border-left: 3px solid var(--dai-accent);
    background: linear-gradient(90deg, rgba(249, 115, 22, 0.06), transparent 80%);
    border-radius: 0 0.5rem 0.5rem 0;
}
.dai-pov-label {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-accent);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    margin-bottom: 0.7rem;
    display: block;
    font-weight: 500;
}
.dai-pov p {
    color: var(--dai-on-navy-strong);
    font-size: 0.98rem;
    line-height: 1.6;
    margin: 0;
}
.dai-pov p + p { margin-top: 0.65rem; }
.dai-pov p strong { color: #ffffff; font-weight: 600; }
.dai-pov a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-pov a:hover { color: #ffffff; }

/* ============ LAYER PANELS (incumbent vs challenger) ============ */
.dai-layer {
    margin-top: 2rem;
    padding: 1.75rem;
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    color: var(--dai-ink);
    transition: transform 0.18s, box-shadow 0.18s;
}
.dai-layer:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.12);
}
.dai-layer-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1.25rem;
    margin-bottom: 1.1rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--dai-rule);
}
.dai-layer-head h3 {
    font-size: 1.35rem;
    font-weight: 500;
    color: var(--dai-ink);
    margin: 0;
    letter-spacing: -0.01em;
}
.dai-layer-tag {
    font-family: var(--dai-mono);
    font-size: 0.68rem;
    color: var(--dai-ink-faint);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
}
.dai-layer-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.dai-layer-col h4 {
    font-family: var(--dai-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--dai-ink-faint);
    margin: 0 0 0.85rem;
    font-weight: 500;
}
.dai-layer-col.challenger h4 { color: var(--dai-accent); }
.dai-layer-col p {
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--dai-ink-muted);
    margin: 0 0 0.7rem;
}
.dai-layer-col p:last-child { margin-bottom: 0; }
.dai-layer-col p strong { color: var(--dai-ink); font-weight: 600; }
.dai-layer-col p a {
    color: var(--dai-navy);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(30, 58, 138, 0.35);
    transition: color 0.15s, text-decoration-color 0.15s;
}
.dai-layer-col p a:hover { color: var(--dai-accent); text-decoration-color: var(--dai-accent); }

.dai-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.9rem;
}
.dai-pill {
    font-family: var(--dai-mono);
    font-size: 0.72rem;
    padding: 0.25rem 0.65rem;
    border: 1px solid var(--dai-rule-strong);
    border-radius: 999px;
    color: var(--dai-ink-soft);
    background: rgba(15, 23, 42, 0.02);
    letter-spacing: 0.02em;
    transition: background 0.15s, border-color 0.15s;
}
.dai-pill[data-tip] { cursor: pointer; }
.dai-pill[data-tip]:hover { background: rgba(15, 23, 42, 0.06); border-color: var(--dai-ink-faint); }
.dai-layer-col.challenger .dai-pill[data-tip]:hover {
    background: rgba(249, 115, 22, 0.12);
    border-color: var(--dai-accent);
}
strong[data-tip] {
    cursor: pointer;
    text-decoration: underline dotted rgba(30, 58, 138, 0.4);
    text-underline-offset: 3px;
}
strong[data-tip]:hover { text-decoration-color: var(--dai-accent); }

/* ============ SVG DIAGRAM LINKS ============ */
.dai-svg-link { cursor: pointer; transition: filter 0.15s ease, transform 0.15s ease; transform-box: fill-box; transform-origin: center; }
.dai-svg-link:hover { filter: drop-shadow(0 0 8px rgba(249, 115, 22, 0.6)); }
.dai-svg-link:hover rect { stroke: var(--dai-accent); stroke-width: 2.5px; }
.dai-svg-link:focus { outline: none; }
.dai-svg-link:focus-visible rect { stroke: var(--dai-accent); stroke-width: 3px; }

/* ============ CUSTOM TOOLTIP OVERLAY ============ */
.dai-tooltip {
    position: fixed;
    pointer-events: none;
    background: rgba(10, 14, 26, 0.97);
    color: #ffffff;
    border: 1px solid rgba(249, 115, 22, 0.45);
    border-radius: 0.45rem;
    padding: 0.65rem 0.85rem;
    font-family: 'Aeonik Regular', system-ui, sans-serif;
    font-size: 0.8rem;
    line-height: 1.45;
    max-width: 320px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.12s ease;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.005em;
}
.dai-tooltip.show { opacity: 1; visibility: visible; }
.dai-tooltip-hint {
    display: block;
    margin-top: 0.4rem;
    padding-top: 0.4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-family: var(--dai-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dai-accent-soft);
}
.dai-layer-col.challenger .dai-pill {
    border-color: rgba(249, 115, 22, 0.4);
    background: rgba(249, 115, 22, 0.06);
    color: #b45309;
}
.dai-pill.star {
    background: rgba(249, 115, 22, 0.18);
    border-color: var(--dai-accent);
    color: #9a3412;
    font-weight: 600;
}
.dai-layer-col.incumbent .dai-pill.star {
    background: rgba(30, 58, 138, 0.12);
    border-color: var(--dai-navy);
    color: var(--dai-navy);
}

.dai-layer-note {
    margin-top: 0.9rem;
    padding-top: 0.8rem;
    border-top: 1px dashed var(--dai-rule);
    font-size: 0.82rem;
    color: var(--dai-ink-faint);
    font-style: italic;
    line-height: 1.5;
}

/* ============ ADJACENT BLOCK ============ */
.dai-adjacent {
    margin-top: 2rem;
    padding: 1.75rem;
    background: var(--dai-card-bg);
    border: 1px dashed var(--dai-rule-strong);
    border-radius: 0.75rem;
    color: var(--dai-ink);
    position: relative;
}
.dai-adjacent::before {
    content: "";
    position: absolute;
    top: 0;
    left: 1.75rem;
    width: 60px;
    height: 2px;
    background: var(--dai-ink-faint);
    border-radius: 0 0 4px 4px;
}
.dai-adjacent-marker {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--dai-mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    color: var(--dai-ink-faint);
    text-transform: uppercase;
    margin-bottom: 0.9rem;
}
.dai-adjacent-marker .num { color: var(--dai-ink-muted); font-size: 0.9rem; }
.dai-adjacent h3 {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--dai-ink);
    margin: 0 0 0.7rem;
    letter-spacing: -0.01em;
    line-height: 1.2;
}
.dai-adjacent h3 em { font-style: italic; color: var(--dai-ink-muted); font-weight: 400; }
.dai-adjacent > p {
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--dai-ink-muted);
    margin-bottom: 1.25rem;
    max-width: 76ch;
}
.dai-adjacent > p a { color: var(--dai-navy); text-decoration: underline; text-underline-offset: 2px; }
.dai-adjacent-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    margin-top: 0.5rem;
}
.dai-adjacent-cell {
    padding: 1rem 1.1rem;
    background: var(--dai-card-bg-2);
    border-radius: 0.5rem;
    border: 1px solid var(--dai-rule);
}
.dai-adjacent-cell .dai-pill {
    border-color: var(--dai-rule-strong);
    background: rgba(148, 163, 184, 0.1);
    color: var(--dai-ink-soft);
}
.dai-adjacent-cell p {
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--dai-ink-muted);
    margin: 0.6rem 0 0;
}
.dai-adjacent-cell p strong { color: var(--dai-ink); font-weight: 600; }
.dai-adjacent-cell p a { color: var(--dai-navy); text-decoration: underline; text-underline-offset: 2px; }

/* ============ TIER GRID ============ */
.dai-tiers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-top: 2.5rem;
}
.dai-tier {
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    padding: 1.6rem 1.5rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    color: var(--dai-ink);
    transition: transform 0.18s;
}
.dai-tier:hover { transform: translateY(-3px); }
.dai-tier-num {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-accent);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
}
.dai-tier h4 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--dai-ink);
    margin: 0 0 1rem;
    letter-spacing: -0.01em;
}
.dai-tier ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.dai-tier li {
    font-size: 0.88rem;
    color: var(--dai-ink-muted);
    line-height: 1.5;
    padding: 0.55rem 0;
    border-bottom: 1px dashed var(--dai-rule);
}
.dai-tier li:last-child { border-bottom: none; }
.dai-tier li strong { color: var(--dai-ink); font-weight: 600; }
.dai-tier li a {
    color: var(--dai-navy);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(30, 58, 138, 0.35);
}
.dai-tier li a:hover { color: var(--dai-accent); text-decoration-color: var(--dai-accent); }

/* ============ BENCHMARKS ============ */
.dai-benchmarks {
    margin-top: 2rem;
    padding: 1.6rem 1.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: 0.75rem;
}
.dai-benchmarks h4 {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-accent-soft);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin: 0 0 1rem;
    font-weight: 500;
}
.dai-benchmarks ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.dai-benchmarks li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.92rem;
    color: var(--dai-on-navy-soft);
    line-height: 1.55;
    position: relative;
    padding-left: 1.4rem;
}
.dai-benchmarks li:last-child { border-bottom: none; }
.dai-benchmarks li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--dai-accent);
    font-family: var(--dai-mono);
}
.dai-benchmarks li strong { color: #ffffff; font-weight: 500; }
.dai-benchmarks li a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-benchmarks li a:hover { color: #ffffff; }

/* ============ METHODOLOGY ============ */
.dai-method-section { padding: 5rem 0; }
.dai-method-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}
.dai-method-col h3 {
    font-size: 1.3rem;
    font-weight: 500;
    color: #ffffff;
    margin: 0 0 1rem;
    letter-spacing: -0.01em;
}
.dai-method-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.dai-method-list li {
    padding: 0.85rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    gap: 1.2rem;
}
.dai-method-list li:first-child { border-top: none; }
.dai-method-k {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-on-navy-faint);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    min-width: 8rem;
    padding-top: 0.2rem;
    flex-shrink: 0;
}
.dai-method-v {
    color: var(--dai-on-navy-soft);
    font-size: 0.92rem;
    line-height: 1.55;
}
.dai-method-v a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-method-v a:hover { color: #ffffff; }
.dai-method-v strong { color: #ffffff; font-weight: 500; }

/* ============ CTA ============ */
.dai-cta {
    padding: 4.5rem 0;
    background: rgba(0, 0, 0, 0.18);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.dai-cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.dai-section-label-light { color: rgba(255, 255, 255, 0.55) !important; }
.dai-section-label-light .dai-section-num { color: rgba(255, 255, 255, 0.3); }
.dai-cta-h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    font-weight: 300;
    color: #ffffff;
    margin: 0 0 1.25rem;
}
.dai-cta-h2 em { font-style: normal; color: var(--dai-accent-soft); font-weight: 400; }
.dai-cta-p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--dai-on-navy-soft);
    margin: 0;
}
.dai-cta-p a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-cta-p a:hover { color: #ffffff; }
.dai-cta-actions { display: flex; flex-direction: column; gap: 0.7rem; }
.dai-btn {
    display: inline-flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.05rem 1.4rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: #ffffff;
    font-family: var(--dai-mono);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.15s;
    border-radius: 0.5rem;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.02);
}
.dai-btn:hover {
    background: #ffffff;
    color: var(--dai-navy);
    text-decoration: none;
    transform: translateY(-1px);
}
.dai-btn-arrow {
    font-family: 'Aeonik Regular', system-ui, sans-serif;
    font-size: 1.15rem;
    transition: transform 0.2s;
}
.dai-btn:hover .dai-btn-arrow { transform: translateX(4px); }

/* ============ CROSS-LAB LINK STRIP ============ */
.dai-crosslink {
    margin-top: 1.5rem;
    padding: 0.9rem 1.25rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    font-family: var(--dai-mono);
    font-size: 0.78rem;
    color: var(--dai-on-navy-soft);
    line-height: 1.5;
}
.dai-crosslink strong {
    color: var(--dai-accent-soft);
    font-weight: 500;
    margin-right: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.68rem;
}
.dai-crosslink a {
    color: #ffffff;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(255, 255, 255, 0.4);
}
.dai-crosslink a:hover { color: var(--dai-accent-soft); text-decoration-color: var(--dai-accent-soft); }

/* ============ DISCLAIMER ============ */
.dai-disclaimer { padding: 1.5rem 0 0.5rem; }
.dai-disclaimer p {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-on-navy-faint);
    text-align: center;
    margin: 0;
    letter-spacing: 0.05em;
}
.dai-disclaimer a {
    color: var(--dai-accent-soft);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.dai-disclaimer a:hover { color: #ffffff; }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
    .dai-tldr-grid { grid-template-columns: repeat(2, 1fr); }
    .dai-meta { grid-template-columns: repeat(2, 1fr); }
    .dai-tiers { grid-template-columns: 1fr; }
    .dai-method-grid, .dai-cta-grid { grid-template-columns: 1fr; gap: 2rem; }
    .dai-scene, .dai-method-section { padding: 3.5rem 0; }
    .dai-hero { padding: 6rem 0 2rem; }
    .dai-layer-body { grid-template-columns: 1fr; gap: 1.4rem; }
    .dai-adjacent-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .dai-tldr-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .dai-meta { grid-template-columns: 1fr; gap: 1rem; }
    .dai-stat { font-size: 2.4rem; }
    .dai-subnav { top: 60px; }
    .dai-layer { padding: 1.4rem; }
    .dai-tier { padding: 1.25rem; }
    .dai-diagram-wrap { padding: 1rem; }
    .dai-layer-head { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
}

#header.scrolled ~ main .dai-subnav { background: rgba(30, 58, 138, 0.95); }

/* ============================================================
   DECENTRALIZED-AI EXTENSIONS
   Project cards, culture grid, interactive explorer, risk cards.
   ============================================================ */

/* ---- Section intro helpers ---- */
.dai-layers-intro { /* tightens spacing when a layer table follows the lede */ }

/* ---- Stack mapping table inside [01] ---- */
.dai-map-strip {
    margin-top: 2.5rem;
    overflow-x: auto;
    border-radius: 0.75rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
}
.dai-map-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--dai-card-bg);
    color: var(--dai-ink);
    font-size: 0.9rem;
    min-width: 720px;
}
.dai-map-table thead th {
    font-family: var(--dai-mono);
    font-size: 0.64rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dai-ink-faint);
    text-align: left;
    padding: 0.95rem 1.1rem;
    border-bottom: 1px solid var(--dai-rule-strong);
    background: var(--dai-card-bg-2);
    white-space: nowrap;
}
.dai-map-table tbody td {
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--dai-rule);
    vertical-align: top;
    line-height: 1.5;
    color: var(--dai-ink-muted);
}
.dai-map-table tbody tr:last-child td { border-bottom: none; }
.dai-map-table tbody tr:hover td { background: rgba(249, 115, 22, 0.04); }
.dai-map-table td.dai-map-layer {
    font-weight: 600;
    color: var(--dai-ink);
    white-space: nowrap;
}
.dai-map-table td.dai-map-layer span {
    display: block;
    font-family: var(--dai-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dai-ink-faint);
    font-weight: 500;
    margin-top: 0.2rem;
}
.dai-map-table .dai-map-cell-centralized { color: var(--dai-ink-faint); }
.dai-map-table a {
    color: var(--dai-navy);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(30, 58, 138, 0.35);
}
.dai-map-table a:hover { color: var(--dai-accent); text-decoration-color: var(--dai-accent); }

/* ---- Culture / "why different" grid [02] ---- */
.dai-culture-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    margin-top: 2.5rem;
}
.dai-culture-card {
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    padding: 1.6rem 1.6rem 1.5rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    color: var(--dai-ink);
    transition: transform 0.18s, box-shadow 0.18s;
}
.dai-culture-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.12);
}
.dai-culture-card h3 {
    font-size: 1.12rem;
    font-weight: 600;
    color: var(--dai-ink);
    margin: 0 0 0.6rem;
    letter-spacing: -0.01em;
    line-height: 1.25;
}
.dai-culture-card h3 em { font-style: normal; color: var(--dai-accent); }
.dai-culture-card p {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--dai-ink-muted);
    margin: 0;
}
.dai-culture-card p strong { color: var(--dai-ink); font-weight: 600; }
.dai-culture-card p a, .dai-project p a {
    color: var(--dai-navy);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(30, 58, 138, 0.35);
    transition: color 0.15s, text-decoration-color 0.15s;
}
.dai-culture-card p a:hover, .dai-project p a:hover { color: var(--dai-accent); text-decoration-color: var(--dai-accent); }

/* ---- Project cards (category sections) ---- */
.dai-project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    margin-top: 2rem;
}
.dai-project {
    display: flex;
    flex-direction: column;
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    padding: 1.6rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    color: var(--dai-ink);
    transition: transform 0.18s, box-shadow 0.18s;
}
.dai-project:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.12);
}
.dai-project.dai-marquee { grid-column: 1 / -1; }
.dai-project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.85rem;
}
.dai-tag {
    font-family: var(--dai-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.22rem 0.55rem;
    border-radius: 999px;
    border: 1px solid var(--dai-rule-strong);
    color: var(--dai-ink-faint);
    background: rgba(15, 23, 42, 0.02);
}
.dai-tag.layer { color: var(--dai-navy); border-color: rgba(30, 58, 138, 0.35); background: rgba(30, 58, 138, 0.06); }
.dai-tag.stage { color: var(--dai-accent); border-color: rgba(249, 115, 22, 0.4); background: rgba(249, 115, 22, 0.06); }
.dai-project-name {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0 0 0.15rem;
    line-height: 1.15;
}
.dai-project-name a {
    color: var(--dai-ink);
    text-decoration: none;
    background-image: linear-gradient(var(--dai-accent), var(--dai-accent));
    background-size: 0% 2px;
    background-repeat: no-repeat;
    background-position: 0 100%;
    transition: background-size 0.2s, color 0.15s;
}
.dai-project-name a:hover { color: var(--dai-accent); background-size: 100% 2px; }
.dai-project-role {
    font-size: 0.8rem;
    color: var(--dai-ink-faint);
    font-style: italic;
    margin: 0 0 0.9rem;
    line-height: 1.4;
}
.dai-project p {
    font-size: 0.9rem;
    line-height: 1.58;
    color: var(--dai-ink-muted);
    margin: 0 0 0.85rem;
}
.dai-project p strong { color: var(--dai-ink); font-weight: 600; }
.dai-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0 0 0.95rem;
}
.dai-metric {
    flex: 1 1 auto;
    min-width: 90px;
    padding: 0.55rem 0.7rem;
    border-radius: 0.45rem;
    background: var(--dai-card-bg-2);
    border: 1px solid var(--dai-rule);
}
.dai-metric .v {
    display: block;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dai-navy);
    line-height: 1.1;
    letter-spacing: -0.01em;
}
.dai-metric .k {
    display: block;
    font-family: var(--dai-mono);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dai-ink-faint);
    margin-top: 0.2rem;
    line-height: 1.3;
}
.dai-project-team {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--dai-ink-muted);
    padding-top: 0.85rem;
    margin-top: 0.2rem;
    border-top: 1px dashed var(--dai-rule);
}
.dai-project-team a { color: var(--dai-navy); text-decoration: underline; text-underline-offset: 2px; }
.dai-project-team strong { color: var(--dai-ink-soft); font-weight: 600; }
.dai-project-pov {
    margin-top: 0.85rem;
    padding: 0.85rem 0.95rem;
    border-left: 3px solid var(--dai-accent);
    background: linear-gradient(90deg, rgba(249, 115, 22, 0.07), transparent 85%);
    border-radius: 0 0.4rem 0.4rem 0;
}
.dai-project-pov .lab {
    font-family: var(--dai-mono);
    font-size: 0.6rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--dai-accent);
    font-weight: 600;
    display: block;
    margin-bottom: 0.4rem;
}
.dai-project-pov p {
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--dai-ink-soft);
    margin: 0;
}
.dai-project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.95rem;
    font-family: var(--dai-mono);
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dai-navy);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.15s, color 0.15s;
}
.dai-project-link:hover { color: var(--dai-accent); gap: 0.65rem; }
.dai-project-link .arr { font-family: 'Aeonik Regular', system-ui, sans-serif; }

/* ---- Supporting-projects sub-grid (smaller cards) ---- */
.dai-support {
    margin-top: 1.2rem;
    padding: 1.5rem 1.6rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px dashed rgba(255, 255, 255, 0.16);
    border-radius: 0.75rem;
}
.dai-support-label {
    font-family: var(--dai-mono);
    font-size: 0.66rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--dai-on-navy-faint);
    margin-bottom: 1rem;
    display: block;
}
.dai-support-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.9rem;
}
.dai-support-item {
    font-size: 0.86rem;
    line-height: 1.55;
    color: var(--dai-on-navy-soft);
}
.dai-support-item strong { color: #ffffff; font-weight: 600; }
.dai-support-item a { color: var(--dai-accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.dai-support-item a:hover { color: #ffffff; }

/* ---- Interactive Explorer ---- */
.dai-explorer-wrap {
    margin-top: 2.5rem;
    padding: 1.75rem;
    background: var(--dai-card-bg);
    border-radius: 0.75rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.1);
    color: var(--dai-ink);
}
.dai-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    margin-bottom: 1.1rem;
}
.dai-chip {
    font-family: var(--dai-mono);
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    border: 1px solid var(--dai-rule-strong);
    background: rgba(15, 23, 42, 0.02);
    color: var(--dai-ink-muted);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.dai-chip:hover { border-color: var(--dai-ink-faint); background: rgba(15, 23, 42, 0.05); }
.dai-chip.active {
    background: var(--dai-navy);
    border-color: var(--dai-navy);
    color: #ffffff;
}
.dai-chip .n { opacity: 0.55; margin-left: 0.3rem; font-size: 0.62rem; }
.dai-search-row {
    display: flex;
    gap: 0.7rem;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}
.dai-search {
    flex: 1 1 240px;
    font-family: 'Aeonik Regular', system-ui, sans-serif;
    font-size: 0.9rem;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--dai-rule-strong);
    border-radius: 0.5rem;
    color: var(--dai-ink);
    background: var(--dai-card-bg-2);
    transition: border-color 0.15s, box-shadow 0.15s;
}
.dai-search:focus {
    outline: none;
    border-color: var(--dai-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.12);
}
.dai-search::placeholder { color: var(--dai-ink-faint); }
.dai-explorer-count {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    color: var(--dai-ink-faint);
    text-transform: uppercase;
    white-space: nowrap;
}
.dai-explorer-count strong { color: var(--dai-accent); font-weight: 600; }
.dai-explorer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.85rem;
}
.dai-xcard {
    display: flex;
    flex-direction: column;
    text-align: left;
    padding: 1rem 1.05rem;
    background: var(--dai-card-bg-2);
    border: 1px solid var(--dai-rule);
    border-radius: 0.6rem;
    text-decoration: none;
    color: var(--dai-ink);
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.dai-xcard:hover {
    transform: translateY(-2px);
    border-color: var(--dai-accent);
    box-shadow: 0 12px 26px -12px rgba(0, 0, 0, 0.3);
}
.dai-xcard[hidden] { display: none; }
.dai-xcard-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.45rem;
}
.dai-xcard-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dai-ink);
    letter-spacing: -0.01em;
}
.dai-xcard-stage {
    font-family: var(--dai-mono);
    font-size: 0.56rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dai-accent);
    white-space: nowrap;
    flex-shrink: 0;
}
.dai-xcard-layer {
    font-family: var(--dai-mono);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dai-navy);
    margin-bottom: 0.5rem;
}
.dai-xcard-innov {
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--dai-ink-muted);
    margin: 0 0 0.6rem;
}
.dai-xcard-foot {
    margin-top: auto;
    padding-top: 0.55rem;
    border-top: 1px dashed var(--dai-rule);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}
.dai-xcard-dna {
    font-family: var(--dai-mono);
    font-size: 0.58rem;
    letter-spacing: 0.05em;
    color: var(--dai-ink-faint);
    text-transform: uppercase;
}
.dai-xcard-arrow {
    font-size: 0.85rem;
    color: var(--dai-ink-faint);
    transition: transform 0.15s, color 0.15s;
}
.dai-xcard:hover .dai-xcard-arrow { color: var(--dai-accent); transform: translateX(3px); }
.dai-explorer-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--dai-ink-faint);
    font-size: 0.9rem;
}

/* ---- Risk cards [14] (on navy) ---- */
.dai-risk-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2.5rem;
}
.dai-risk {
    padding: 1.3rem 1.4rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.6rem;
    transition: background 0.15s, border-color 0.15s;
}
.dai-risk:hover { background: rgba(255, 255, 255, 0.06); border-color: rgba(249, 115, 22, 0.3); }
.dai-risk-num {
    font-family: var(--dai-mono);
    font-size: 0.7rem;
    color: var(--dai-accent);
    letter-spacing: 0.12em;
    font-weight: 600;
}
.dai-risk h4 {
    font-size: 1.02rem;
    font-weight: 500;
    color: #ffffff;
    margin: 0.4rem 0 0.5rem;
    letter-spacing: -0.01em;
    line-height: 1.25;
}
.dai-risk p {
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--dai-on-navy-soft);
    margin: 0;
}

/* ---- Stack diagram link tweaks already inherited as .dai-svg-link ---- */

/* ---- Responsive ---- */
@media (max-width: 960px) {
    .dai-project-grid,
    .dai-culture-grid,
    .dai-support-grid,
    .dai-risk-grid { grid-template-columns: 1fr; }
    .dai-explorer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .dai-explorer-grid { grid-template-columns: 1fr; }
    .dai-explorer-wrap { padding: 1.25rem; }
    .dai-project { padding: 1.3rem; }
}