:root {
    color-scheme: dark;
    --bg-main: #03050A;
    --bg-secondary: #07101C;
    --panel: rgba(8, 17, 29, 0.84);
    --panel-border: rgba(120, 147, 165, 0.24);
    --text-main: #D8E1EA;
    --text-muted: #778695;
    --glow-orange: #FF6A1A;
    --glow-orange-soft: rgba(255, 106, 26, 0.16);
    --accent-data: #4BA3C7;
    --accent-data-soft: rgba(75, 163, 199, 0.18);
    --surface: rgba(4, 9, 17, 0.88);
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.46);
    --radius-lg: 0.9rem;
    --radius-md: 0.575rem;
    --tube-width: clamp(1.5rem, 6.35vw, 4.95rem);
    --tube-height: calc(var(--tube-width) * 1.95);
    --tube-gap: clamp(0.12rem, 0.6vw, 0.55rem);
    --digit-size: calc(var(--tube-width) * 0.98);
    --content-width: min(1100px, calc(100vw - 2rem));
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background:
        radial-gradient(circle at top, rgba(75, 163, 199, 0.08), transparent 40rem),
        radial-gradient(circle at 80% 30%, rgba(255, 106, 26, 0.05), transparent 32rem),
        linear-gradient(180deg, var(--bg-secondary), var(--bg-main) 62%);
}

body {
    margin: 0;
    min-height: 100vh;
    position: relative;
    color: var(--text-main);
    font-family: "Trebuchet MS", "Gill Sans", "Avenir Next", sans-serif;
    background: transparent;
    overflow-x: hidden;
}

.sky-backdrop {
    position: fixed;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(3, 5, 10, 0.16), rgba(3, 5, 10, 0.58)),
        radial-gradient(circle at 50% 20%, rgba(75, 163, 199, 0.12), transparent 38rem),
        url("../carl-wang-lsxADNRNmc8-unsplash.jpg") center 42% / cover no-repeat;
    filter: saturate(0.98) brightness(0.84) contrast(1.06);
    transform: scale(1.015);
    transform-origin: center;
    pointer-events: none;
    z-index: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: #F0F6FB;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-data);
    outline-offset: 3px;
}

code,
pre {
    font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.starfield {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.32;
    z-index: 1;
}

.grid-overlay {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(75, 163, 199, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(75, 163, 199, 0.05) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.68), transparent 90%);
    opacity: 0.1;
    pointer-events: none;
    z-index: 1;
}

.app-shell {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 1.25rem 1rem 0;
}

.site-meta {
    position: relative;
    z-index: 2;
    margin-top: 0.32rem;
    padding: 0 1rem 1.1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.16rem;
    text-align: center;
}

.site-attribution,
.site-copyright {
    color: rgba(255, 255, 255, 0.25);
    font-size: 0.72rem;
}

.site-attribution {
    letter-spacing: 0.04em;
}

.site-attribution a {
    color: rgba(255, 255, 255, 0.42);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.22);
    text-underline-offset: 0.16em;
}

.site-copyright {
    letter-spacing: 0.08em;
}

.page {
    width: var(--content-width);
    margin: 0 auto;
}

.hero-panel,
.docs-panel {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-lg);
    background:
        linear-gradient(180deg, rgba(10, 22, 37, 0.9), rgba(4, 8, 15, 0.8)),
        var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(4px);
}

.hero-panel {
    padding: clamp(1.25rem, 3vw, 2rem);
}

.docs-panel {
    padding: clamp(1.25rem, 3vw, 2rem);
}

.hero-panel__glow,
.hero-panel__rings {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-panel__glow {
    background:
        radial-gradient(circle at 50% 18%, rgba(255, 106, 26, 0.11), transparent 18rem),
        radial-gradient(circle at 18% 72%, rgba(75, 163, 199, 0.08), transparent 20rem);
}

.hero-panel__rings::before,
.hero-panel__rings::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(75, 163, 199, 0.12);
    border-radius: 999px;
}

.hero-panel__rings::before {
    width: 46rem;
    height: 18rem;
    left: 50%;
    top: 9rem;
    transform: translateX(-50%);
}

.hero-panel__rings::after {
    width: 32rem;
    height: 12rem;
    left: 50%;
    top: 12rem;
    transform: translateX(-50%);
}

.hero-meta {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    z-index: 1;
}

.eyebrow {
    margin: 0;
    color: var(--accent-data);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.status-cluster {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.78rem;
    border: 1px solid rgba(255, 106, 26, 0.28);
    border-radius: 0.95rem;
    color: rgba(255, 221, 202, 0.94);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    background: rgba(255, 106, 26, 0.08);
}

.status-pill::before {
    content: "";
    width: 0.48rem;
    height: 0.48rem;
    border-radius: 50%;
    background: var(--glow-orange);
    box-shadow: 0 0 10px rgba(255, 106, 26, 0.7);
}

.status-copy {
    color: var(--text-muted);
    font-size: 0.94rem;
}

.hero-title {
    position: relative;
    z-index: 1;
    margin: 1.1rem 0 0;
    font-family: "Arial Narrow", "Trebuchet MS", sans-serif;
    font-size: clamp(2.4rem, 6vw, 4.5rem);
    line-height: 0.96;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-title--home {
    margin-top: 0;
    text-align: center;
    font-size: clamp(1.6rem, 4vw, 3rem);
}

.hero-title--docs {
    font-size: clamp(2rem, 5.4vw, 3.8rem);
}

.hero-subtitle {
    position: relative;
    z-index: 1;
    margin: 0.85rem 0 1.4rem;
    max-width: 42rem;
    color: rgba(216, 225, 234, 0.85);
    font-size: 1rem;
    line-height: 1.65;
}

.hero-subtitle--home {
    margin-inline: auto;
    text-align: center;
}

.hero-subtitle--docs {
    max-width: 48rem;
}

.instrument-panel {
    position: relative;
    z-index: 1;
    margin-top: 1.7rem;
    padding: clamp(1rem, 2vw, 1.4rem);
    border-radius: 0.725rem;
    background:
        linear-gradient(180deg, rgba(7, 16, 28, 0.94), rgba(3, 7, 14, 0.98)),
        rgba(3, 6, 12, 0.96);
    border: 1px solid rgba(95, 123, 145, 0.24);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.03),
        0 18px 34px rgba(0, 0, 0, 0.28);
}

.instrument-panel--error {
    display: grid;
    place-items: center;
    min-height: 16rem;
}

.error-panel {
    max-width: 36rem;
    text-align: center;
}

.error-panel h2 {
    margin: 0 0 0.85rem;
    font-size: 1.4rem;
}

.error-panel p {
    margin: 0.5rem 0;
    color: rgba(216, 225, 234, 0.82);
    line-height: 1.7;
}

.nixie-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--tube-gap);
    flex-wrap: nowrap;
    width: 100%;
    min-height: calc(var(--tube-height) + 0.2rem);
}

.nixie-tube {
    position: relative;
    flex: 0 0 var(--tube-width);
    width: var(--tube-width);
    height: var(--tube-height);
    border-radius: 0.5rem;
    border: 1px solid rgba(125, 138, 152, 0.18);
    background:
        linear-gradient(180deg, rgba(34, 46, 61, 0.18), rgba(3, 7, 12, 0.86)),
        linear-gradient(180deg, rgba(11, 19, 30, 0.96), rgba(5, 9, 16, 0.98));
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.03),
        inset 0 16px 22px rgba(255, 255, 255, 0.02),
        0 14px 28px rgba(0, 0, 0, 0.28);
    overflow: hidden;
}

.nixie-tube::before {
    content: "";
    position: absolute;
    inset: 0.22rem 0.38rem auto;
    height: 24%;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 72%);
    opacity: 0.8;
    pointer-events: none;
}

.nixie-tube::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background:
        radial-gradient(circle at 50% 45%, rgba(255, 106, 26, 0.08), transparent 46%),
        radial-gradient(circle at 50% 88%, rgba(0, 0, 0, 0.42), transparent 34%);
    pointer-events: none;
}

.tube-inner {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.04), rgba(0, 0, 0, 0.12)),
        linear-gradient(180deg, rgba(9, 14, 22, 0.72), rgba(3, 5, 9, 0.96));
}

.digit-stack {
    position: relative;
    width: 100%;
    height: 100%;
}

.digit-layer {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-family: "Palatino Linotype", "Book Antiqua", "Baskerville", serif;
    font-size: var(--digit-size);
    line-height: 1;
    color: rgba(255, 183, 140, 0.048);
    text-shadow: 0 0 5px rgba(255, 106, 26, 0.03);
    transition:
        color 180ms ease,
        opacity 180ms ease,
        text-shadow 180ms ease,
        filter 180ms ease,
        transform 180ms ease;
    user-select: none;
}

.digit-layer[data-digit="0"] { transform: translate(-0.02em, -0.04em); }
.digit-layer[data-digit="1"] { transform: translate(0.03em, -0.06em); }
.digit-layer[data-digit="2"] { transform: translate(-0.05em, 0.03em); }
.digit-layer[data-digit="3"] { transform: translate(0.05em, -0.01em); }
.digit-layer[data-digit="4"] { transform: translate(-0.02em, 0.05em); }
.digit-layer[data-digit="5"] { transform: translate(0.05em, 0.04em); }
.digit-layer[data-digit="6"] { transform: translate(-0.04em, -0.02em); }
.digit-layer[data-digit="7"] { transform: translate(0.02em, 0.06em); }
.digit-layer[data-digit="8"] { transform: translate(-0.03em, 0.01em); }
.digit-layer[data-digit="9"] { transform: translate(0.04em, -0.04em); }

.digit-layer.is-active {
    color: rgba(255, 196, 164, 0.98);
    text-shadow:
        0 0 10px rgba(255, 106, 26, 0.88),
        0 0 20px rgba(255, 106, 26, 0.58),
        0 0 34px rgba(255, 106, 26, 0.3);
    filter: saturate(1.12);
    z-index: 1;
}

.nixie-tube.is-updating .digit-layer.is-active {
    animation: ignition 180ms ease-out;
}

.decimal-lamp {
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(0.28rem, 0.9vw, 0.6rem);
    margin-inline: clamp(0.05rem, 0.15vw, 0.2rem);
}

.decimal-lamp span {
    width: clamp(0.22rem, 0.8vw, 0.52rem);
    height: clamp(0.22rem, 0.8vw, 0.52rem);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 206, 180, 1), rgba(255, 106, 26, 0.94));
    box-shadow:
        0 0 8px rgba(255, 106, 26, 0.95),
        0 0 18px rgba(255, 106, 26, 0.45);
}

.metric-grid {
    position: relative;
    z-index: 1;
    margin-top: 1.4rem;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.9rem;
}

.metric-card,
.doc-card,
.scale-card,
.summary-panel__block {
    border: 1px solid rgba(112, 136, 155, 0.2);
    border-radius: var(--radius-md);
    background:
        linear-gradient(180deg, rgba(11, 19, 30, 0.9), rgba(4, 8, 15, 0.96));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.metric-card {
    padding: 1rem;
    min-height: 7rem;
}

.metric-card__label,
.summary-panel__label {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.metric-card__value,
.summary-panel__value {
    margin: 0.7rem 0 0;
    font-family: "Arial Narrow", "Trebuchet MS", sans-serif;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    letter-spacing: 0.03em;
    color: var(--text-main);
}

.metric-card__value span {
    font-size: 0.78em;
    color: rgba(216, 225, 234, 0.76);
}

.metric-card__note {
    margin: 0.4rem 0 0;
    color: var(--accent-data);
    font-size: 0.88rem;
}

.scale-card {
    position: relative;
    z-index: 1;
    margin-top: 1.4rem;
    padding: 1rem 1.1rem 1.15rem;
}

.scale-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgba(216, 225, 234, 0.9);
    font-size: 0.88rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.scale-track {
    position: relative;
    margin-top: 1rem;
    height: 0.82rem;
    border-radius: 0.41rem;
    background:
        linear-gradient(180deg, rgba(7, 16, 28, 0.92), rgba(4, 9, 16, 0.98)),
        rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(90, 112, 130, 0.3);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.04),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.scale-track__fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--scale-position);
    min-width: 0;
    background:
        linear-gradient(90deg, rgba(255, 106, 26, 0.52), rgba(255, 165, 96, 0.74) 45%, rgba(75, 163, 199, 0.78));
    box-shadow:
        inset 0 0 10px rgba(255, 255, 255, 0.08),
        0 0 16px rgba(75, 163, 199, 0.14);
}

.scale-track__fill::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.15), transparent 60%);
    opacity: 0.55;
}

.scale-track__marker {
    position: absolute;
    top: 50%;
    left: var(--scale-position);
    width: 1.02rem;
    height: 1.02rem;
    border-radius: 50%;
    background: var(--glow-orange);
    border: 2px solid rgba(255, 245, 239, 0.86);
    transform: translate(-50%, -50%);
    box-shadow:
        0 0 0 4px rgba(255, 106, 26, 0.18),
        0 0 24px rgba(255, 106, 26, 0.5);
}

.scale-milestones {
    position: relative;
    height: 11.1rem;
    margin-top: -0.32rem;
    overflow: visible;
}

.scale-milestone {
    position: absolute;
    top: 0;
    transform: translateX(-50%);
    z-index: 1;
}

.scale-milestone.is-hovered,
.scale-milestone:focus-within,
.scale-milestone.is-open {
    z-index: 12;
}

.scale-milestone__button {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font: inherit;
}

.scale-milestone__dot {
    width: 0.58rem;
    height: 0.58rem;
    border-radius: 50%;
    background: rgba(75, 163, 199, 0.9);
    box-shadow: 0 0 0 4px rgba(75, 163, 199, 0.12);
    position: relative;
    z-index: 1;
}

.scale-milestone__stem {
    width: 1px;
    height: 1rem;
    background: rgba(121, 144, 162, 0.5);
}

.scale-milestone__label {
    margin-top: 0.42rem;
    max-width: 6.3rem;
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: rgba(216, 225, 234, 0.8);
    white-space: normal;
    text-align: center;
    line-height: 1.28;
    text-wrap: balance;
    position: relative;
    transform: translateX(var(--label-shift, 0rem));
}

.scale-milestone[data-lane="1"] .scale-milestone__stem {
    height: 2.1rem;
}

.scale-milestone[data-lane="2"] .scale-milestone__stem {
    height: 3.2rem;
}

.scale-milestone[data-lane="3"] .scale-milestone__stem {
    height: 4.2rem;
}

.scale-milestone[data-lane="4"] .scale-milestone__stem {
    height: 5.3rem;
}

.scale-milestone[data-lane="5"] .scale-milestone__stem {
    height: 6.4rem;
}

.scale-milestone[data-lane="6"] .scale-milestone__stem {
    height: 7.45rem;
}

.scale-milestone__tooltip {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 0.55rem);
    display: flex;
    flex-direction: column;
    gap: 0.22rem;
    min-width: 12rem;
    max-width: 14rem;
    padding: 0.75rem 0.8rem;
    border: 1px solid rgba(97, 120, 139, 0.24);
    border-radius: 0.475rem;
    background:
        linear-gradient(180deg, rgba(9, 17, 28, 0.96), rgba(4, 8, 15, 0.98));
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    color: rgba(216, 225, 234, 0.92);
    line-height: 1.45;
    opacity: 0;
    pointer-events: none;
    transform: translate(calc(-50% + var(--tooltip-shift, 0rem)), 0.35rem);
    transition: opacity 150ms ease, transform 150ms ease;
    z-index: 3;
}

.scale-milestone__tooltip strong {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.scale-milestone__meta {
    color: var(--text-muted);
    font-size: 0.76rem;
}

.scale-milestone__meta--index {
    color: rgba(255, 206, 180, 0.9);
}

.scale-milestone.is-hovered .scale-milestone__tooltip,
.scale-milestone:focus-within .scale-milestone__tooltip,
.scale-milestone.is-open .scale-milestone__tooltip {
    opacity: 1;
    transform: translate(calc(-50% + var(--tooltip-shift, 0rem)), 0);
}

.scale-milestone--illustrative .scale-milestone__dot {
    background: rgba(121, 144, 162, 0.72);
    box-shadow: 0 0 0 3px rgba(121, 144, 162, 0.1);
}

.scale-milestone--illustrative .scale-milestone__stem {
    background:
        repeating-linear-gradient(
            180deg,
            rgba(121, 144, 162, 0.58) 0 4px,
            transparent 4px 8px
        );
}

.scale-milestone--illustrative .scale-milestone__label {
    color: rgba(190, 201, 211, 0.7);
}

.scale-milestone--historical .scale-milestone__dot {
    background: rgba(75, 163, 199, 0.94);
    box-shadow:
        0 0 0 4px rgba(75, 163, 199, 0.14),
        0 0 14px rgba(75, 163, 199, 0.16);
}

.scale-milestone--current .scale-milestone__dot {
    background: rgba(255, 106, 26, 0.98);
    box-shadow:
        0 0 0 4px rgba(255, 106, 26, 0.15),
        0 0 16px rgba(255, 106, 26, 0.4);
}

.scale-milestone--current .scale-milestone__stem {
    background: rgba(255, 106, 26, 0.7);
}

.scale-milestone--current .scale-milestone__label {
    color: rgba(255, 216, 193, 0.92);
}

.scale-milestone--hard-data .scale-milestone__dot {
    background: rgba(92, 188, 220, 0.98);
    box-shadow:
        0 0 0 4px rgba(75, 163, 199, 0.16),
        0 0 16px rgba(75, 163, 199, 0.28);
}

.scale-milestone--hard-data,
.scale-milestone--current {
    z-index: 2;
}

.scale-milestone--hard-data .scale-milestone__stem {
    background: rgba(75, 163, 199, 0.76);
}

.scale-milestone--hard-data .scale-milestone__label {
    color: rgba(198, 233, 244, 0.9);
}

.scale-note {
    margin: 0.85rem 0 0;
    color: var(--text-muted);
    line-height: 1.68;
    max-width: 64rem;
}

.link-strip {
    position: relative;
    z-index: 1;
    margin-top: 1.35rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.link-chip {
    padding: 0.55rem 0.8rem;
    border: 1px solid rgba(110, 134, 154, 0.22);
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.03);
    color: rgba(216, 225, 234, 0.88);
    font-size: 0.92rem;
    transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.link-chip:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 106, 26, 0.32);
    background: rgba(255, 106, 26, 0.05);
}

.link-chip.is-active {
    border-color: rgba(255, 106, 26, 0.34);
    background: rgba(255, 106, 26, 0.08);
    color: var(--text-main);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.95rem;
    margin-top: 1.4rem;
}

.doc-card {
    padding: 1rem 1.05rem;
}

.doc-card h2 {
    margin: 0;
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.doc-card p {
    margin: 0.8rem 0 0;
    color: rgba(216, 225, 234, 0.84);
    line-height: 1.72;
}

.doc-card pre {
    margin: 0.9rem 0 0;
    padding: 0.85rem 0.95rem;
    border-radius: 0.475rem;
    background: rgba(0, 0, 0, 0.28);
    overflow-x: auto;
    color: rgba(255, 224, 206, 0.96);
}

.summary-panel {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.95rem;
    margin-top: 1.35rem;
}

.summary-panel__block {
    padding: 1rem;
}

@keyframes ignition {
    0% {
        transform: scale(0.98);
        filter: brightness(1);
    }
    50% {
        transform: scale(1.025);
        filter: brightness(1.24);
    }
    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

@media (max-width: 1040px) {
    .metric-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .docs-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .hero-title {
        font-size: clamp(2rem, 9vw, 3rem);
    }

    .hero-title--home {
        font-size: clamp(1.45rem, 6.8vw, 2.35rem);
    }

    .hero-panel__rings::before,
    .hero-panel__rings::after {
        opacity: 0.6;
    }

    .summary-panel {
        grid-template-columns: 1fr;
    }

    .scale-milestones {
        height: 11.55rem;
    }

    .scale-milestone[data-lane="3"] .scale-milestone__stem {
        height: 4.45rem;
    }

    .scale-milestone[data-lane="4"] .scale-milestone__stem {
        height: 5.55rem;
    }

    .scale-milestone[data-lane="5"] .scale-milestone__stem {
        height: 6.65rem;
    }

    .scale-milestone[data-lane="6"] .scale-milestone__stem {
        height: 7.7rem;
    }
}

@media (max-width: 520px) {
    :root {
        --content-width: min(100vw - 1rem, 1100px);
        --tube-width: clamp(1.42rem, 6.65vw, 2.05rem);
        --tube-gap: clamp(0.08rem, 0.22vw, 0.18rem);
    }

    .app-shell {
        padding-inline: 0.5rem;
        padding-bottom: 0;
    }

    .site-meta {
        padding-inline: 0.5rem;
        padding-bottom: 0.9rem;
    }

    .site-attribution,
    .site-copyright {
        font-size: 0.68rem;
    }

    .metric-grid {
        grid-template-columns: 1fr;
    }

    .hero-panel__rings {
        display: none;
    }

    .scale-milestones {
        height: 12rem;
    }

    .scale-milestone__label {
        max-width: 5.3rem;
        font-size: 0.58rem;
        letter-spacing: 0.08em;
    }

    .scale-milestone__tooltip {
        min-width: 10rem;
        max-width: 11.5rem;
        padding: 0.68rem 0.72rem;
    }

    .scale-milestone[data-lane="1"] .scale-milestone__stem {
        height: 2.3rem;
    }

    .scale-milestone[data-lane="2"] .scale-milestone__stem {
        height: 3.5rem;
    }

    .scale-milestone[data-lane="3"] .scale-milestone__stem {
        height: 4.8rem;
    }

    .scale-milestone[data-lane="4"] .scale-milestone__stem {
        height: 6rem;
    }

    .scale-milestone[data-lane="5"] .scale-milestone__stem {
        height: 7.1rem;
    }

    .scale-milestone[data-lane="6"] .scale-milestone__stem {
        height: 8.2rem;
    }

}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}