/* learn.html — the primer. Loaded on top of styles.css, which supplies the
   tokens, the shell and the uk-* recipes. Nothing here defines a colour of its
   own; every value is a token, so the page follows the same light/dark theme as
   the rest of the site. */

/* Two anchors at the top, in the same tag language as the read page's lanes. */
.learn-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-3);
    margin: var(--space-6) 0 var(--space-10);
}

.learn-nav a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
}

.learn-nav a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.learn-section {
    scroll-margin-top: var(--space-6);
}

.learn-section + .learn-section {
    margin-top: var(--space-12);
    padding-top: var(--space-10);
    border-top: 1px solid var(--color-border-medium);
}

.learn-h2 {
    margin: var(--space-3) 0 var(--space-6);
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: var(--leading-tight);
}

.learn-h3 {
    margin: var(--space-8) 0 var(--space-2);
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--color-text);
    line-height: var(--leading-tight);
}

.learn-h3:first-of-type {
    margin-top: 0;
}

.learn-section p {
    margin: 0 0 var(--space-4);
    font-size: var(--fs-base);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.learn-section p:last-child {
    margin-bottom: 0;
}

.learn-section strong {
    color: var(--color-text);
    font-weight: 600;
}

.learn-section code {
    padding: 1px 5px;
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-sm);
    background: var(--color-bg-muted);
    font-size: var(--fs-xs);
    color: var(--color-text);
}

.learn-list {
    margin: 0 0 var(--space-4);
    padding: 0;
    list-style: none;
}

.learn-list li {
    position: relative;
    padding: 0 0 0 var(--space-5);
    margin-bottom: var(--space-3);
    font-size: var(--fs-base);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.learn-list li::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 11px;
    width: 5px;
    height: 5px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
}

.learn-list li:last-child {
    margin-bottom: 0;
}

/* The line at the end of a list that says what the list does NOT claim. Scoped
   past `.learn-section p` so the muted colour actually lands. */
.learn-section .learn-note {
    padding-left: var(--space-4);
    border-left: 2px solid var(--color-border-strong);
    color: var(--color-text-muted);
}

.learn-back {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    font-size: var(--fs-sm);
}

@media (width <= 520px) {
    .learn-nav {
        margin: var(--space-5) 0 var(--space-8);
    }

    .learn-section + .learn-section {
        margin-top: var(--space-10);
        padding-top: var(--space-8);
    }
}