:root {
    --font-ui: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --guide-lavender: #c9d1ff;
    --guide-muted: #7f8ba2;
}

body {
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
}

h1 { color: var(--guide-lavender); }
.badge, .eyebrow, .step-label, code, pre { font-family: var(--font-mono); }
.badge, .step-label { font-size: 10px; letter-spacing: .08em; }

.topline {
    align-items: center;
    margin-bottom: 40px;
    gap: 20px;
}

.guide-back, .guide-to-top {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    width: fit-content;
    padding: 7px 0;
    color: var(--guide-muted);
    font: 400 11px/1.5 var(--font-mono);
    letter-spacing: .02em;
    text-decoration: none;
    transition: color .15s;
}

.guide-back::before, .guide-to-top::after {
    content: '';
    width: 14px;
    height: 14px;
    flex: 0 0 14px;
    background: currentColor;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M12.5 8h-9m4-4-4 4 4 4' fill='none' stroke='black' stroke-width='1.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
}

.guide-to-top::after { transform: rotate(90deg); }
.guide-back:hover, .guide-to-top:hover { color: var(--guide-lavender); text-decoration: none; }
.guide-back:focus-visible, .guide-to-top:focus-visible { outline: 1px solid var(--guide-lavender); outline-offset: 5px; border-radius: 3px; }

.jump-links {
    justify-content: flex-start;
    align-items: center;
    gap: 6px 24px;
    padding: 0 0 14px;
    margin: 28px 0;
    border-bottom: 1px solid #c9d1ff16;
    font: 400 11px/1.7 var(--font-mono);
}
.jump-links a { color: #a4afc6; padding: 5px 0; }
.jump-links a:hover { color: var(--guide-lavender); text-decoration: none; }

footer {
    margin-top: 36px;
    padding: 20px 0 8px;
    border-top: 1px solid #c9d1ff16;
    text-align: center;
}
footer nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 5px 10px;
    margin: 0;
    font: 400 10px/1.8 var(--font-mono);
    letter-spacing: .35px;
}
footer nav a { color: var(--guide-lavender); text-decoration: none; }
footer nav a:hover { color: #e1e5ff; text-decoration: underline; text-underline-offset: 4px; }
.footer-dot { color: #626d82; font-size: 10px; user-select: none; }
footer .guide-copyright {
    margin: 7px 0 0;
    color: #626d82;
    font: 400 9px/1.8 var(--font-mono);
    letter-spacing: .65px;
}
footer .guide-to-top { margin: 9px auto 0; font-size: 10px; padding: 4px 0; }

@media (max-width: 680px) {
    .topline { gap: 14px; }
    .guide-back { font-size: 10px; gap: 5px; }
    .jump-links { column-gap: 18px; }
    footer nav { gap: 4px 8px; }
    footer .guide-copyright { font-size: 8px; letter-spacing: .25px; }
}
@media (prefers-reduced-motion: reduce) {
    .guide-back, .guide-to-top { transition: none; }
}

/* Shared edge-to-edge contours for informational pages. */
body.guide-contours{position:relative;isolation:isolate}
body.guide-contours::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:var(--topographic-background,none);background-size:cover;background-position:center top;opacity:.52;mask-image:linear-gradient(to bottom,#000 0%,#000a 30%,#0003 58%,#000b 100%)}
@media(max-width:680px){body.guide-contours::before{opacity:.35}}