/* Shared layout and accessibility rules for every full page. */
body {
    padding-top: 5rem;
}

[hidden] {
    display: none !important;
}

section[id], [id^="chapter"] {
    scroll-margin-top: 6rem;
}

:focus-visible {
    outline: 3px solid #2563eb;
    outline-offset: 4px;
}

#ai-chat-window {
    max-height: calc(100dvh - 8rem);
}

#chat-messages {
    min-height: 0;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}