:root {
    --background: #080a0d;
    --panel: #101419;
    --panel-soft: #151a20;
    --text: #f5f5f2;
    --muted: #abb1b8;
    --border: #2a3037;
    --accent: #ff941f;
    --accent-soft: rgba(255,148,31,.12);
    --maximum: 1240px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at 85% 8%, rgba(255,148,31,.07), transparent 28rem),
        var(--background);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.65;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    display: flex;
    align-items: center;
    gap: 28px;
    min-height: 76px;
    padding: 10px max(24px, calc((100vw - var(--maximum)) / 2));
    border-bottom: 1px solid rgba(255,148,31,.35);
    background: rgba(8,10,13,.94);
    backdrop-filter: blur(18px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    min-width: 190px;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 39px;
    height: 39px;
    place-items: center;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-weight: 700;
    clip-path: polygon(25% 4%,75% 4%,100% 50%,75% 96%,25% 96%,0 50%);
}

.brand strong,
.brand small {
    display: block;
    line-height: 1.15;
}

.brand strong {
    letter-spacing: .08em;
    text-transform: uppercase;
}

.brand small {
    margin-top: 4px;
    color: var(--accent);
    font-size: .66rem;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.canonical-navigation {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
}

.canonical-navigation a {
    padding: 9px 0;
    color: #e8e8e5;
    font-size: .69rem;
    font-weight: 700;
    letter-spacing: .045em;
    line-height: 1.2;
    text-decoration: none;
    text-transform: uppercase;
    white-space: nowrap;
}

.canonical-navigation a:hover,
.canonical-navigation a:focus-visible {
    color: var(--accent);
}

.mobile-navigation-button {
    display: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--text);
    padding: 8px 12px;
}

.page-hero {
    display: grid;
    grid-template-columns: minmax(0,1.05fr) minmax(340px,.95fr);
    gap: 56px;
    align-items: center;
    max-width: var(--maximum);
    margin: 0 auto;
    padding: 68px 24px 54px;
    border-bottom: 1px solid var(--border);
}

.hero-copy h1 {
    max-width: 900px;
    margin: 12px 0 18px;
    font-size: clamp(2.4rem,5vw,4.7rem);
    line-height: 1.02;
    letter-spacing: -.045em;
}

.hero-copy > p {
    max-width: 760px;
    margin: 0;
    color: #d0d4d8;
    font-size: clamp(1.05rem,1.5vw,1.25rem);
}

.eyebrow,
.section-index {
    color: var(--accent);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}

.status-line {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 25px;
}

.status-line span {
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    font-size: .72rem;
}

.hero-visual,
.animated-visual {
    min-height: 370px;
}

.page-shell {
    display: grid;
    grid-template-columns: minmax(0,1fr) 280px;
    gap: 58px;
    max-width: var(--maximum);
    margin: 0 auto;
    padding: 26px 24px 54px;
}

.content-section,
.visual-section {
    padding: 42px 0;
    border-bottom: 1px solid var(--border);
}

.section-heading {
    display: grid;
    grid-template-columns: 76px minmax(0,1fr);
    gap: 20px;
    align-items: start;
}

.section-heading h2 {
    margin: -4px 0 20px;
    font-size: clamp(1.5rem,2.4vw,2.25rem);
    line-height: 1.16;
    letter-spacing: -.025em;
}

.section-content {
    max-width: 800px;
    margin-left: 96px;
}

.section-content p {
    margin: 0 0 17px;
    color: #d4d7da;
}

.concept-list {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 10px 18px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.concept-list li {
    position: relative;
    min-height: 56px;
    padding: 14px 14px 14px 38px;
    border: 1px solid var(--border);
    background: var(--panel);
}

.concept-list li::before {
    position: absolute;
    top: 18px;
    left: 15px;
    width: 9px;
    height: 9px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    content: "";
}

.page-context {
    padding-top: 42px;
}

.context-panel {
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
}

.context-panel span {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: .72rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.context-panel strong {
    display: block;
    line-height: 1.35;
}

.context-panel p {
    margin: 0;
    color: var(--muted);
    font-size: .86rem;
}

.visual-section .animated-visual {
    margin: 12px 0 0 96px;
}

.visual-svg {
    display: block;
    width: 100%;
    height: auto;
    min-height: 340px;
    overflow: visible;
}

.visual-svg text {
    fill: var(--text);
    font-family: inherit;
    font-size: 15px;
    text-anchor: middle;
    dominant-baseline: middle;
}

.visual-svg .node {
    fill: var(--panel);
    stroke: var(--border);
    stroke-width: 1.5;
}

.visual-svg .node.active {
    stroke: var(--accent);
}

.visual-svg .edge {
    fill: none;
    stroke: #5b626a;
    stroke-width: 1.5;
    stroke-dasharray: 8 7;
}

.visual-svg .accent-edge {
    stroke: var(--accent);
}

.visual-svg .pulse {
    fill: var(--accent);
}

.visual-svg .visual-label {
    fill: var(--muted);
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.visual-svg .reveal {
    opacity: .18;
    transition: opacity .45s ease, transform .45s ease;
    transform-origin: center;
}

.visual-svg .reveal.visible {
    opacity: 1;
}

.related-section {
    max-width: var(--maximum);
    margin: 0 auto;
    padding: 52px 24px 68px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(4,minmax(0,1fr));
    gap: 12px;
    margin: 18px 0 0 96px;
}

.related-link {
    display: flex;
    min-height: 98px;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
    padding: 18px;
    border: 1px solid var(--border);
    background: var(--panel);
    text-decoration: none;
}

.related-link:hover {
    border-color: var(--accent);
}

.related-link b {
    color: var(--accent);
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    padding: 36px max(24px,calc((100vw - var(--maximum)) / 2));
    border-top: 1px solid var(--border);
    color: var(--muted);
}

.site-footer p {
    margin: 5px 0 0;
}

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

    .visual-svg .reveal {
        opacity: 1;
        transition: none;
    }
}

@media (max-width: 1080px) {
    .site-header {
        flex-wrap: wrap;
    }

    .mobile-navigation-button {
        display: block;
        margin-left: auto;
    }

    .canonical-navigation {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        order: 3;
    }

    .canonical-navigation.open {
        display: flex;
    }

    .canonical-navigation a {
        min-height: 42px;
        padding: 13px 4px;
        border-top: 1px solid var(--border);
    }

    .page-hero {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        min-height: 320px;
    }

    .page-shell {
        grid-template-columns: 1fr;
    }

    .page-context {
        display: grid;
        grid-template-columns: repeat(3,minmax(0,1fr));
        gap: 18px;
        padding-top: 0;
    }

    .context-panel {
        border: 1px solid var(--border);
        padding: 16px;
    }

    .related-grid {
        grid-template-columns: repeat(2,minmax(0,1fr));
    }
}

@media (max-width: 680px) {
    .page-hero {
        padding-top: 42px;
    }

    .hero-copy h1 {
        font-size: clamp(2rem,12vw,3.2rem);
    }

    .section-heading {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .section-content,
    .visual-section .animated-visual,
    .related-grid {
        margin-left: 0;
    }

    .concept-list,
    .page-context,
    .related-grid {
        grid-template-columns: 1fr;
    }

    .hero-visual,
    .animated-visual {
        min-height: 280px;
    }

    .site-footer {
        flex-direction: column;
    }
}