/* ============================================================
   continua.club — earth-toned glassmorphism, parallax strata
   Compliance tokens: Mono" (Google Interactive Intersection Observer triggers animations elements
   ============================================================ */

:root {
    --c-sienna:   #a0522d; /* raw sienna, dominant accent */
    --c-umber:    #2c1810; /* burnt umber, primary bg */
    --c-tan:      #c4a77d; /* desert tan, secondary bg */
    --c-copper:   #b87333; /* oxidized copper, hover */
    --c-kaolin:   #e8dcc8; /* clay light, primary text */
    --c-verdigris:#4a7c6f; /* teal patina, accent */
    --c-ochre:    #8b6914; /* deep ochre, metadata */
    --c-loam:     #1a1412; /* charcoal loam, deepest bg */

    --font-display: 'Jost', 'Futura', 'IBM Plex Sans', sans-serif;
    --font-body:    'Nunito Sans', 'Inter', system-ui, sans-serif;
    --font-mono:    'IBM Plex Mono', 'Space Mono', ui-monospace, monospace;
    --font-serif:   'Cormorant Garamond', 'Cormorant', Georgia, serif;

    --scroll-y: 0px;

    --spine-w: 48px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    background: var(--c-loam);
    color: var(--c-kaolin);
    font-family: var(--font-body);
    line-height: 1.65;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 10% 0%, rgba(160,82,45,0.18), transparent 45%),
        radial-gradient(ellipse at 90% 30%, rgba(139,105,20,0.14), transparent 50%),
        radial-gradient(ellipse at 30% 70%, rgba(74,124,111,0.10), transparent 50%),
        var(--c-loam);
}

img, svg { display: block; max-width: 100%; }

ul { list-style: none; }

/* ============================================================
   Background wash (Layer 0)
   ============================================================ */
.bg-wash {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        linear-gradient(180deg,
            rgba(26, 20, 18, 0.0) 0%,
            rgba(44, 24, 16, 0.4) 20%,
            rgba(139, 105, 20, 0.15) 40%,
            rgba(160, 82, 45, 0.18) 60%,
            rgba(44, 24, 16, 0.5) 80%,
            rgba(26, 20, 18, 0.0) 100%);
    transform: translate3d(0, calc(var(--scroll-y) * -0.08), 0);
    will-change: transform;
    mix-blend-mode: screen;
    opacity: 0.55;
}

/* Topographic contour layer (Layer 0/1) */
.topo-contours {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    transform: translate3d(0, calc(var(--scroll-y) * -0.15), 0);
    will-change: transform;
    opacity: 0.8;
}
.topo-contours path {
    fill: none;
    stroke: var(--c-sienna);
    stroke-width: 1px;
    opacity: 0.12;
}

/* ============================================================
   Vertical navigation spine
   ============================================================ */
.spine {
    position: fixed;
    left: 0; top: 0;
    width: var(--spine-w);
    height: 100vh;
    background: rgba(44, 24, 16, 0.7);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-right: 1px solid rgba(196, 167, 125, 0.15);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
}

.spine-brand {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--c-sienna);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin-bottom: 28px;
    padding-top: 6px;
}

.spine-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 34px;
    padding-top: 20px;
}

.spine-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: color 0.4s ease;
}

.spine-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(232, 220, 200, 0.25);
    margin-bottom: 12px;
    transition: background 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
}

.spine-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    color: rgba(232, 220, 200, 0.45);
    text-transform: uppercase;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    transition: color 0.4s ease;
}

.spine-connector {
    position: absolute;
    left: 100%;
    top: 6px;
    width: 0;
    height: 1px;
    background: var(--c-sienna);
    opacity: 0;
    transition: width 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.3s ease;
}

.spine-item.active .spine-dot {
    background: var(--c-sienna);
    transform: scale(1.4);
    box-shadow: 0 0 12px rgba(160, 82, 45, 0.6);
}
.spine-item.active .spine-label {
    color: var(--c-kaolin);
}
.spine-item.active .spine-connector {
    width: 28px;
    opacity: 1;
}

.spine-item:hover .spine-dot { background: var(--c-copper); }
.spine-item:hover .spine-label { color: var(--c-copper); }

.spine-footer {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.22em;
    color: rgba(232, 220, 200, 0.3);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin-top: 28px;
}

/* ============================================================
   Scroll root & sections
   ============================================================ */
.scroll-root {
    position: relative;
    z-index: 2;
    padding-left: var(--spine-w);
}

.section {
    position: relative;
    min-height: 120vh;
    padding: 10vh 6vw 10vh 6vw;
    overflow: hidden;
}

.section + .section { margin-top: -20vh; }

.layer {
    position: relative;
    will-change: transform;
}

.layer-far {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.layer-back-pattern {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
}

.layer-mid {
    position: relative;
    z-index: 3;
}

.layer-near {
    position: absolute;
    inset: 0;
    z-index: 4;
    pointer-events: none;
}

.ghost-word {
    position: absolute;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 20vw;
    letter-spacing: -0.04em;
    color: var(--c-tan);
    opacity: 0.06;
    text-transform: uppercase;
    white-space: nowrap;
    line-height: 1;
    user-select: none;
}
.ghost-word--a { top: 55%; left: -6vw; }
.ghost-word--b { top: 10%; right: -4vw; }
.ghost-word--c { bottom: 5%; left: -8vw; }
.ghost-word--d { top: 40%; right: -10vw; }
.ghost-word--e { top: 50%; left: -12vw; font-size: 24vw; }

/* ============================================================
   Typography classes
   ============================================================ */
.meta-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}
.meta-row--bottom {
    margin-top: 40px;
    margin-bottom: 0;
}

.meta-label {
    font-family: var(--font-mono);
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-tan);
}
.meta-label--muted { color: rgba(232, 220, 200, 0.5); font-weight: 300; }

.meta-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--c-verdigris);
}

.section-kicker {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    color: var(--c-ochre);
    text-transform: uppercase;
    margin-bottom: 16px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(139, 105, 20, 0.4);
}

.section-title {
    position: relative;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    letter-spacing: -0.03em;
    text-transform: uppercase;
    color: var(--c-kaolin);
    line-height: 1.05;
    max-width: 12ch;
    margin-bottom: 22px;
}

.section-lede {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.4vw, 1.18rem);
    line-height: 1.7;
    color: rgba(232, 220, 200, 0.78);
    max-width: 56ch;
    margin-bottom: 48px;
}

.section-head {
    max-width: 780px;
    margin-bottom: 60px;
}
.section-head--right {
    margin-left: auto;
    margin-right: 4vw;
    text-align: right;
}
.section-head--right .section-title { margin-left: auto; }
.section-head--right .section-lede { margin-left: auto; }

/* Underline-draw */
.underline-draw { position: relative; display: block; }
.draw-line {
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100%;
    height: 14px;
    overflow: visible;
}
.draw-line path {
    fill: none;
    stroke: var(--c-sienna);
    stroke-width: 3px;
    stroke-linecap: round;
    stroke-dasharray: 1400;
    stroke-dashoffset: 1400;
    transition: stroke-dashoffset 1.1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.underline-draw.visible .draw-line path { stroke-dashoffset: 0; }

.mini-draw {
    width: 100%;
    height: 4px;
    overflow: visible;
}
.mini-draw path {
    fill: none;
    stroke: var(--c-copper);
    stroke-width: 1.5px;
    stroke-linecap: round;
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    transition: stroke-dashoffset 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.visible .mini-draw path { stroke-dashoffset: 0; }

.stratum-mark {
    width: 100%;
    height: 6px;
    margin-top: 18px;
    overflow: visible;
}
.stratum-mark path {
    fill: none;
    stroke: var(--c-sienna);
    stroke-width: 2px;
    stroke-linecap: round;
    stroke-dasharray: 420;
    stroke-dashoffset: 420;
    transition: stroke-dashoffset 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.stratum.visible .stratum-mark path { stroke-dashoffset: 0; }

/* ============================================================
   Glassmorphic cards
   ============================================================ */
.glass-card {
    position: relative;
    background: rgba(44, 24, 16, 0.45);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border: 1px solid rgba(196, 167, 125, 0.15);
    border-radius: 12px;
    box-shadow:
        0 8px 32px rgba(26, 20, 18, 0.3),
        inset 0 1px 0 rgba(232, 220, 200, 0.08);
    padding: 24px 26px;
    color: var(--c-kaolin);
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 0.4s ease, box-shadow 0.4s ease;
}

.glass-card:hover {
    border-color: rgba(184, 115, 51, 0.45);
    box-shadow:
        0 14px 42px rgba(26, 20, 18, 0.45),
        inset 0 1px 0 rgba(232, 220, 200, 0.15);
    transform: translateY(-3px);
}

.card-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px dashed rgba(196, 167, 125, 0.2);
}

.card-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--c-verdigris);
}

.card-id {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--c-ochre);
}

.card-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.15rem, 1.8vw, 1.5rem);
    letter-spacing: -0.01em;
    color: var(--c-kaolin);
    margin: 4px 0 12px;
    line-height: 1.2;
}

.card-body {
    font-family: var(--font-body);
    font-size: 0.98rem;
    line-height: 1.65;
    color: rgba(232, 220, 200, 0.82);
}

.card-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid rgba(196, 167, 125, 0.12);
}

.foot-stamp {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    color: var(--c-ochre);
    text-transform: uppercase;
}

.card-foot .mini-draw { width: 120px; }

/* Floating tags */
.floating-tag {
    position: absolute;
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    background: rgba(44, 24, 16, 0.55);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    border: 1px solid rgba(184, 115, 51, 0.25);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: var(--c-copper);
    pointer-events: none;
}

/* ============================================================
   Section 1: Veil
   ============================================================ */
.veil {
    min-height: 110vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 8vh;
    padding-bottom: 8vh;
}
.veil .layer-mid {
    width: 100%;
    max-width: 1100px;
}

.veil-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
}

.site-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: -0.04em;
    text-transform: uppercase;
    color: var(--c-kaolin);
    line-height: 1;
    padding: 20px 0 24px;
    position: relative;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.site-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transition-delay: calc(var(--i, 0) * 60ms);
}
.site-title.visible .letter {
    opacity: 1;
    transform: translateY(0);
}
.site-title .letter--dot { color: var(--c-sienna); }

.site-title .draw-line {
    bottom: 6px;
    height: 18px;
}
.site-title .draw-line path {
    stroke-width: 4px;
}

.tagline {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: clamp(1.2rem, 2.2vw, 1.75rem);
    color: rgba(232, 220, 200, 0.78);
    max-width: 44ch;
    line-height: 1.45;
}

.scroll-bar {
    display: inline-block;
    width: 80px;
    height: 1px;
    background: rgba(196, 167, 125, 0.2);
    position: relative;
    overflow: hidden;
}
.scroll-bar-inner {
    position: absolute;
    left: 0; top: 0;
    width: 30%;
    height: 100%;
    background: var(--c-sienna);
    animation: scrollPulse 2.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}
@keyframes scrollPulse {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(150%); }
    100% { transform: translateX(330%); }
}

/* Node-link graphs */
.node-link {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}
.node-link circle {
    fill: var(--c-copper);
    opacity: 0.55;
    animation: nodePulse 15s ease-in-out infinite;
}
.node-link circle:nth-child(2n) { animation-delay: -3s; }
.node-link circle:nth-child(3n) { animation-delay: -7s; }
.node-link circle:nth-child(4n) { animation-delay: -11s; }

.node-link line {
    stroke: var(--c-copper);
    stroke-width: 1px;
    opacity: 0.28;
    animation: linkFade 15s ease-in-out infinite;
}
.node-link line:nth-child(2n) { animation-delay: -5s; }
.node-link line:nth-child(3n) { animation-delay: -9s; }

.node-link--dense { opacity: 0.65; }

@keyframes nodePulse {
    0%, 100% { opacity: 0.15; r: 3; }
    50% { opacity: 0.7; }
}
@keyframes linkFade {
    0%, 100% { opacity: 0.08; }
    40% { opacity: 0.32; }
    60% { opacity: 0.32; }
}

/* Animate SVG 'r' attribute via CSS fallback using transform-origin */
.node-link circle {
    transform-origin: center;
    animation-name: nodePulseTransform;
}
@keyframes nodePulseTransform {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.7; }
}

/* ============================================================
   Section 2: Spectrum shelf
   ============================================================ */
.shelf {
    position: relative;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 8px;
    margin-bottom: 80px;
    min-height: 460px;
}

.shelf .glass-card {
    padding: 26px 28px;
}

.card--a {
    grid-column: 1 / span 5;
    grid-row: 1;
    margin-top: 0;
    margin-left: 2%;
}
.card--b {
    grid-column: 5 / span 5;
    grid-row: 1;
    margin-top: 70px;
    margin-left: 6%;
    z-index: 2;
}
.card--c {
    grid-column: 8 / span 5;
    grid-row: 1;
    margin-top: 150px;
    margin-left: -4%;
    z-index: 3;
}

.tag--1 {
    top: -20px;
    left: 10%;
    color: var(--c-verdigris);
    border-color: rgba(74, 124, 111, 0.35);
}
.tag--2 {
    top: 40%;
    left: 46%;
    color: var(--c-sienna);
}
.tag--3 {
    bottom: 0;
    right: 8%;
    color: var(--c-ochre);
    border-color: rgba(139, 105, 20, 0.3);
}

.pull-quote {
    max-width: 680px;
    margin: 40px auto 0;
    padding: 32px 40px;
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: clamp(1.3rem, 2.6vw, 2.2rem);
    line-height: 1.35;
    color: var(--c-kaolin);
    text-align: center;
    border-left: 2px solid var(--c-sienna);
    background: linear-gradient(90deg, rgba(160, 82, 45, 0.06), transparent 60%);
}
.pull-quote cite {
    display: block;
    margin-top: 16px;
    font-family: var(--font-mono);
    font-style: normal;
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-ochre);
}

/* ============================================================
   Section 3: Strata
   ============================================================ */
.strata-stack {
    position: relative;
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.stratum {
    position: relative;
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 24px;
    padding: 26px 32px;
    transform: translateX(0);
    opacity: 0;
    transition:
        opacity 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        border-color 0.4s ease,
        box-shadow 0.4s ease;
}
.stratum.visible {
    opacity: 1;
    transform: translateX(0);
}

.stratum--0 { margin-left: 0; background: rgba(44, 24, 16, 0.35); }
.stratum--1 { margin-left: 20px; background: rgba(44, 24, 16, 0.42); }
.stratum--2 { margin-left: 40px; background: rgba(44, 24, 16, 0.5); }
.stratum--3 { margin-left: 60px; background: rgba(44, 24, 16, 0.58); }
.stratum--4 { margin-left: 80px; background: rgba(26, 20, 18, 0.65); border-color: rgba(160, 82, 45, 0.28); }

.stratum-index {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 300;
    color: var(--c-sienna);
    line-height: 1;
    letter-spacing: 0.02em;
    padding-top: 6px;
    border-right: 1px solid rgba(160, 82, 45, 0.25);
    padding-right: 18px;
}
.stratum-body { padding-left: 4px; }

.tag--drift-1 { top: 15%; right: 8%; }
.tag--drift-2 { bottom: 18%; right: 14%; color: var(--c-verdigris); border-color: rgba(74, 124, 111, 0.3); }

/* ============================================================
   Section 4: Network
   ============================================================ */
.network-grid {
    position: relative;
    min-height: 720px;
    max-width: 1100px;
    margin: 0 auto;
}

.network-lines {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.network-lines path {
    fill: none;
    stroke: var(--c-copper);
    stroke-width: 1px;
    stroke-linecap: round;
    opacity: 0.4;
    stroke-dasharray: 1600;
    stroke-dashoffset: 1600;
    transition: stroke-dashoffset 1.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.network.visible .network-lines path { stroke-dashoffset: 0; }

.node {
    position: absolute;
    width: 240px;
}
.node-card {
    padding: 18px 20px;
}
.node-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--c-kaolin);
    margin: 8px 0 8px;
}
.node-body {
    font-family: var(--font-body);
    font-size: 0.88rem;
    line-height: 1.55;
    color: rgba(232, 220, 200, 0.75);
}

.node--1 { top: 4%; left: 6%; }
.node--2 { top: 14%; left: 40%; }
.node--3 { top: 24%; right: 4%; }
.node--4 { top: 48%; left: 22%; }
.node--5 { top: 58%; right: 14%; }
.node--6 { bottom: 2%; left: 4%; }

.tag--n1 { top: 40%; right: 38%; }
.tag--n2 { bottom: 40%; left: 48%; color: var(--c-verdigris); border-color: rgba(74, 124, 111, 0.3); }

/* ============================================================
   Section 5: Convergence
   ============================================================ */
.converge-cluster {
    position: relative;
    width: 100%;
    max-width: 760px;
    height: 560px;
    margin: 40px auto 60px;
}

.conv-card {
    position: absolute;
    width: 240px;
    padding: 18px 22px;
    transition:
        transform 1.1s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        opacity 0.8s ease,
        border-color 0.4s ease,
        box-shadow 0.4s ease;
}
.conv-card .card-body {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: 1.08rem;
    line-height: 1.4;
    color: var(--c-kaolin);
    margin-top: 10px;
}

.conv-card--1 { top: 0;    left: 0; transform: translate(-10vw, -6vh) rotate(-4deg); }
.conv-card--2 { top: 5%;   right: 0; transform: translate(10vw, -6vh) rotate(3deg); }
.conv-card--3 { top: 40%;  left: 0; transform: translate(-14vw, 0) rotate(-6deg); }
.conv-card--4 { top: 40%;  right: 0; transform: translate(14vw, 0) rotate(5deg); }
.conv-card--5 { bottom: 0; left: 50%; transform: translate(-50%, 8vh) rotate(-1deg); }

.convergence.visible .conv-card--1 { transform: translate(0, 10%) rotate(-4deg); }
.convergence.visible .conv-card--2 { transform: translate(-20%, 30%) rotate(3deg); }
.convergence.visible .conv-card--3 { transform: translate(20%, -5%) rotate(-6deg); }
.convergence.visible .conv-card--4 { transform: translate(-30%, 20%) rotate(5deg); }
.convergence.visible .conv-card--5 { transform: translate(-50%, -30%) rotate(-1deg); }

.converge-center {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
    pointer-events: none;
}
.converge-ring circle {
    fill: none;
    stroke: var(--c-sienna);
    stroke-width: 1.25px;
    opacity: 0.6;
    animation: ringRotate 14s linear infinite;
    transform-origin: center;
}
.converge-ring circle:nth-child(2) { stroke: var(--c-copper); opacity: 0.5; animation-duration: 18s; animation-direction: reverse; }
.converge-ring circle:nth-child(3) { stroke: var(--c-verdigris); opacity: 0.45; animation-duration: 22s; }

@keyframes ringRotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.pull-quote--final {
    max-width: 720px;
    margin: 60px auto 80px;
    font-size: clamp(1.4rem, 3vw, 2.4rem);
    border-left: 2px solid var(--c-copper);
    background: linear-gradient(90deg, rgba(184, 115, 51, 0.08), transparent 70%);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 40px auto 0;
    padding: 28px 0 20px;
    border-top: 1px solid rgba(196, 167, 125, 0.14);
}
.foot-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
    :root { --spine-w: 36px; }
    .section { padding: 8vh 4vw; }
    .shelf { display: flex; flex-direction: column; gap: 18px; min-height: 0; }
    .shelf .glass-card { grid-column: auto; grid-row: auto; margin: 0; }
    .card--a, .card--b, .card--c { margin: 0; }
    .spine-brand { font-size: 9px; }
    .spine-label { font-size: 9px; }
    .network-grid { min-height: 0; display: flex; flex-direction: column; gap: 14px; }
    .node { position: relative; width: 100%; top: auto; left: auto; right: auto; bottom: auto; }
    .network-lines { display: none; }
    .converge-cluster { height: auto; display: flex; flex-direction: column; gap: 14px; }
    .conv-card { position: relative; width: 100%; transform: none !important; top: auto; left: auto; right: auto; bottom: auto; }
    .converge-center { display: none; }
    .strata-stack .stratum { margin-left: 0 !important; grid-template-columns: 60px 1fr; padding: 20px 18px; }
    .site-footer { grid-template-columns: 1fr; }
}