/* ===========================================================
   Base — design tokens + the truly shared rules.
   Loaded first on every site-level page (index, books);
   page css comes next, css/theme.css last so it wins.
   =========================================================== */

:root {
    --brand: #6e46be;
    --bg: #fafafa;
    --ink: #222;
    --font-sans: -apple-system, BlinkMacSystemFont, "system-ui", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    --font-display: Candara, Constantia, "Avenir Next", Palatino, Cambria, Times, serif;
}

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
}

/* One violet everywhere. Hover/focus stay --brand (the old
   #b088f9 hover failed contrast at 2.6:1 on --bg) — the state
   change shows up as underline + focus ring instead of colour. */
a {
    color: var(--brand);
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
    border-radius: 2px;
}

img {
    max-width: 100%;
    height: auto;
}

.social-icon {
    color: var(--brand);
    margin: 0 4px;
    font-size: 17px; /* svg boxes size in em off this; slightly above text size for optical balance with the [] brackets */
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    vertical-align: -0.18em; /* center icons against the bracket glyph, not the text baseline */
}

.social-icon svg {
    width: 1em;
    height: 1em;
    display: block;
}

.social-icon:hover {
    color: var(--brand);
}

span.highlight {
    background-color: #ffffd0;
}

/* --- slim site nav, text-only, shared by every top-level page --- */
.site-nav {
    margin: 24px auto 12px;
    padding: 0 20px;
    max-width: 1140px;
    text-align: center;
    font-size: 0.9rem;
    color: #737373;
}

.site-nav a[aria-current="page"] {
    font-weight: 700;
}

@media (max-width: 768px) {
    .social-icon {
        padding: 12px;
        margin: 0 -2px;
    }

    .site-nav {
        margin-top: 18px;
    }
}