:root {

    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
    --display-weight: 700;
    --display-tracking: -0.025em;

    --text-tertiary: #78726B;
    --link: #6B5640;

    --stage-a: #A4472A;
    --stage-b: #8A5A0A;
    --stage-c: #A23A55;
    --stage-d: #5C6A1E;
    --stage-e: #76406E;
    --stage-f: #2F6658;
    --tint-a: #F5EBE6;
    --tint-b: #F2EDE3;
    --tint-c: #F5EAEA;
    --tint-d: #EEEEE5;
    --tint-e: #F0EAED;
    --tint-f: #E9EEEB;

    --nav-height: 72px;
    --measure: 66ch;
}

body {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.55;
    font-kerning: normal;
    text-rendering: optimizeLegibility;
}

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: var(--display-weight);
    letter-spacing: var(--display-tracking);
    line-height: 1.15;
    color: var(--text-primary);
}

.logo { font-family: var(--font-display); }

.kicker {
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 2rem; }

.rv-hero {
    padding: calc(var(--nav-height) + 2.25rem) 0 2rem;
}

.rv-hero .wordmark {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem 0.875rem;
    margin-bottom: 1rem;
}

.rv-hero .wordmark strong {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.01em;
}

.rv-hero .wordmark span {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.rv-hero .version-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--link);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.125rem 0.625rem;
    background: rgba(139, 115, 85, 0.06);
}

.rv-hero h1 {
    font-size: clamp(2.125rem, 1.4rem + 2.6vw, 3rem);
    max-width: 24ch;
    margin-bottom: 1rem;
}

.rv-hero .lede {
    font-size: 1.1875rem;
    line-height: 1.5;
    color: var(--text-secondary);
    max-width: 60ch;
    margin-bottom: 1.5rem;
}

.rv-hero .cta-buttons { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.rv-compare { padding: 0.5rem 0 3.5rem; }

.rv-compare h2 {
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
    max-width: 40ch;
}

.rv-compare-grid {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 1.5rem;

    align-items: start;
}

.rv-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
}

.rv-panel .kicker { margin-bottom: 1rem; }

.rv-labels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    margin: 0.5rem 0 1.25rem;
}

.rv-label {
    display: inline-block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.375rem 0.875rem;
}

.rv-label:nth-child(2) { font-size: 1.125rem; }

.rv-panel p.note {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.rv-story {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    max-width: var(--measure);
}

.rv-story a { color: var(--link); }

.rv-chain { list-style: none; position: relative; }

.rv-chain::before {

    content: "";
    position: absolute;
    left: 15px;
    top: 16px;
    bottom: 16px;
    width: 2px;
    background: var(--border);
}

.rv-chain > li {
    position: relative;
    display: grid;
    grid-template-columns: 32px 7.75rem minmax(0, 1fr);
    gap: 0.75rem;
    align-items: start;
    padding: 0.375rem 0;
}

.rv-letter {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.9375rem;
    color: #fff;
    letter-spacing: 0;
}

.rv-stagename {
    font-size: 0.875rem;
    font-weight: 600;
    padding-top: 0.375rem;
    line-height: 1.3;
}

.rv-techs { display: flex; flex-wrap: wrap; gap: 0.375rem; }

.rv-tech {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4rem;
    font-size: 0.9375rem;
    line-height: 1.3;
    text-decoration: none;
    color: var(--text-primary);
    border-radius: 6px;

    border: 1px solid color-mix(in srgb, currentColor 28%, transparent);
    padding: 0.375rem 0.625rem;
    transition: box-shadow 0.15s;
}

.rv-tech b {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 600;
}

.rv-tech span { color: var(--text-primary); }
.rv-tech:hover { box-shadow: 0 0 0 1px currentColor; }
.rv-tech:hover span { text-decoration: underline; }

.rv-tech.is-focal { box-shadow: 0 0 0 2px currentColor; }

.rv-insight {
    margin-top: 1rem;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    background: var(--tint-b);
    font-size: 0.9375rem;
    line-height: 1.55;
    max-width: var(--measure);
}

.rv-insight b { color: var(--stage-b); font-family: var(--font-mono); font-size: 0.875rem; }
.rv-insight a { color: inherit; }

.hue-A { color: var(--stage-a); } .bg-A { background: var(--stage-a); } .tint-A { background: var(--tint-a); }
.hue-B { color: var(--stage-b); } .bg-B { background: var(--stage-b); } .tint-B { background: var(--tint-b); }
.hue-C { color: var(--stage-c); } .bg-C { background: var(--stage-c); } .tint-C { background: var(--tint-c); }
.hue-D { color: var(--stage-d); } .bg-D { background: var(--stage-d); } .tint-D { background: var(--tint-d); }
.hue-E { color: var(--stage-e); } .bg-E { background: var(--stage-e); } .tint-E { background: var(--tint-e); }
.hue-F { color: var(--stage-f); } .bg-F { background: var(--stage-f); } .tint-F { background: var(--tint-f); }

.rv-stats {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
}

.rv-stats .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1.25rem;
}

.rv-stats .stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    font-variant-numeric: lining-nums tabular-nums;
    line-height: 1;
    margin: 0;
}

.rv-stats .stat-label { font-size: 1.0625rem; font-weight: 600; }
.rv-stats .about-line { color: var(--text-secondary); font-size: 1rem; }

.rv-section { padding: 4.5rem 0 0; }

.rv-section h2 { font-size: 2rem; margin-bottom: 0.75rem; }

.rv-section .section-lede {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 56ch;
    margin-bottom: 2rem;
}

.rv-prose p {
    font-size: 1.125rem;
    line-height: 1.6;
    max-width: var(--measure);
    margin-bottom: 1.125rem;
}

.rv-stage-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

a.rv-stage {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.375rem 1.5rem 1.25rem;
    transition: border-color 0.15s;
}

a.rv-stage:hover { border-color: var(--hue); }

a.rv-stage .rv-letter { background: var(--hue); margin-bottom: 0.875rem; width: 40px; height: 40px; font-size: 1.125rem; }
a.rv-stage h3 { font-size: 1.25rem; margin-bottom: 0.375rem; }
a.rv-stage p { color: var(--text-secondary); font-size: 0.9875rem; line-height: 1.55; margin-bottom: 0.75rem; }
a.rv-stage .go { font-size: 0.875rem; font-weight: 600; color: var(--hue); }
a.rv-stage:hover .go { text-decoration: underline; }

.rv-stage.s-A { --hue: var(--stage-a); }
.rv-stage.s-B { --hue: var(--stage-b); }
.rv-stage.s-C { --hue: var(--stage-c); }
.rv-stage.s-D { --hue: var(--stage-d); }
.rv-stage.s-E { --hue: var(--stage-e); }
.rv-stage.s-F { --hue: var(--stage-f); }

.rv-audiences {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

.rv-audiences li {
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-elevated);
}

.rv-updates {
    margin-top: 5rem;
    background: var(--primary-dark);
    color: #fff;
    padding: 3rem 0;
}

.rv-updates .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
}

.rv-updates h2 { color: #fff; font-size: 1.625rem; margin-bottom: 0.25rem; }
.rv-updates p { opacity: 0.9; }
.rv-updates .cta-buttons { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.rv-updates .btn-ghost { color: #fff; border: 2px solid rgba(255, 255, 255, 0.35); background: transparent; }
.rv-updates .btn-ghost:hover { border-color: #fff; }

footer.rv-footer {
    text-align: left;
    padding: 2.5rem 0 2rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-main);
}

.rv-footer .groups {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.75rem;
}

.rv-footer .brand strong {
    font-family: var(--font-display);
    color: var(--primary);
    font-size: 1.0625rem;
    display: block;
    margin-bottom: 0.25rem;
}

.rv-footer h3 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.rv-footer ul { list-style: none; }
.rv-footer li { margin-bottom: 0.25rem; }
.rv-footer a { color: var(--text-secondary); text-decoration: none; }
.rv-footer a:hover { color: var(--link); text-decoration: underline; }

.rv-footer .legal {
    border-top: 1px solid var(--border-light);
    padding-top: 1rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    line-height: 1.7;
}

main.tp-container { padding-top: calc(var(--nav-height) + 3rem); }
main.tp-container .tp-header h1 { font-size: clamp(2rem, 1.5rem + 2vw, 2.625rem); }
main.tp-container .tp-idbadge { font-family: var(--font-mono); }
main.tp-container .tp-section h2,
main.tp-container .tp-cite summary { font-family: var(--font-display); font-size: 1.25rem; font-weight: 650; }
main.tp-container .tp-description { font-size: 1.125rem; line-height: 1.6; max-width: var(--measure); }
main.tp-container .tp-tag { background: var(--tint); color: var(--hue); }
main.tp-container .tp-actions a { color: var(--link); }
main.tp-container .tp-pagenav .tp-navid,
main.tp-container .tp-cite pre { font-family: var(--font-mono); }

@media (max-width: 980px) {
    .rv-compare-grid { grid-template-columns: 1fr; }
    .rv-stage-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .rv-footer .groups { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .rv-footer .brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
    .wrap { padding: 0 1.25rem; }
    .rv-hero { padding-top: calc(var(--nav-height) + 2rem); }
    .rv-hero .lede { font-size: 1.0625rem; }
    .rv-compare h2 { font-size: 1.5rem; }
    .rv-panel { padding: 1.25rem; }
    .rv-chain > li { grid-template-columns: 32px minmax(0, 1fr); }
    .rv-chain > li .rv-techs { grid-column: 2; }
    .rv-stagename { padding-top: 0.4rem; }
    .rv-stage-grid { grid-template-columns: 1fr; }
    .rv-section h2 { font-size: 1.625rem; }
    .rv-footer .groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    main.tp-container { padding-left: 1.25rem; padding-right: 1.25rem; }
}

.rv-seq { list-style: none; counter-reset: seq; flex-direction: column; gap: 0; }
.rv-seq > li {
    position: relative;
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.25rem 0.625rem;
    padding: 0 0 0.875rem 1.75rem;
    counter-increment: seq;
}
.rv-seq > li::before {
    content: counter(seq);
    position: absolute;
    left: 0;
    top: 0.375rem;
    width: 1.125rem;
    height: 1.125rem;
    border-radius: 50%;
    background: var(--stage-b);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 700;
    line-height: 1.125rem;
    text-align: center;
}
.rv-seq > li:not(:last-child)::after {

    content: "";
    position: absolute;
    left: calc(0.5625rem - 1px);
    top: 1.75rem;
    bottom: 0.25rem;
    width: 2px;
    background: var(--stage-b);
    opacity: 0.35;
}
.rv-seq > li:last-child { padding-bottom: 0.25rem; }
.rv-seq small { font-size: 0.8125rem; color: var(--text-secondary); font-style: italic; }

.rv-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}
.rv-key {
    display: inline-block;
    width: 1.5rem;
    height: 0.875rem;
    border-radius: 3px;
    background: var(--tint-b);
    border: 1px solid color-mix(in srgb, var(--stage-b) 28%, transparent);
}

.btn-primary:hover, .btn-large:hover, .btn-white:hover { transform: none; box-shadow: none; }