/* eli15/eli15.css — teaching drawer styling.
 *
 * Colour palette matches the rv-panel (#d38b4b accent, #824006 dark-accent,
 * #fff / #fafafa surfaces). The drawer docks to the right edge so it doesn't
 * cover the driving canvas; on narrow screens it becomes full-width.
 */

/* ─── floating action button ───────────────────────────────────────────── */
.eli15-fab {
    position: fixed;
    right: 1em;
    bottom: 1em;
    z-index: 1200;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid #d38b4b;
    background: #fff;
    color: #824006;
    font-size: 22px;
    line-height: 40px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    padding: 0;
    transition: transform 120ms ease-out, background-color 120ms ease-out;
}
.eli15-fab:hover {
    background: #fff4e2;
    transform: translateY(-1px);
}
.eli15-fab:focus-visible {
    outline: 3px solid #d38b4b;
    outline-offset: 2px;
}

/* ─── badges (anywhere [data-eli15] appears) ───────────────────────────── */
[data-eli15] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.1em;
    height: 1.1em;
    padding: 0 0.3em;
    margin-left: 0.35em;
    border-radius: 999px;
    background: #fff4e2;
    color: #824006;
    border: 1px solid #d38b4b;
    font-size: 0.7rem;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    vertical-align: baseline;
    user-select: none;
    transition: background-color 100ms ease-out;
}
[data-eli15]::before { content: '?'; }
[data-eli15]:empty::before { content: '?'; }
[data-eli15]:hover { background: #ffe1b8; }
[data-eli15]:focus-visible {
    outline: 2px solid #d38b4b;
    outline-offset: 1px;
}

/* Hide the child text "?" we may have placed in HTML — the ::before covers
 * it — but keep the element accessible-text-wise via aria-label if set. */
[data-eli15] > * { display: none; }

/* ─── drawer surface ───────────────────────────────────────────────────── */
.eli15-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(18, 18, 22, 0.0);
    z-index: 1100;
    pointer-events: none;
    transition: background-color 180ms ease-out;
}
.eli15-backdrop.eli15-backdrop-open {
    background: rgba(18, 18, 22, 0.35);
    pointer-events: auto;
}

.eli15-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1101;
    width: min(460px, 92vw);
    height: 100vh;
    background: #fff;
    color: #222;
    box-shadow: -4px 0 18px rgba(0, 0, 0, 0.25);
    transform: translateX(100%);
    transition: transform 220ms ease-out;
    display: flex;
    flex-direction: column;
    font-family: Verdana, -apple-system, system-ui, sans-serif;
    font-size: 0.9rem;
    line-height: 1.5;
    overflow: hidden;
}
.eli15-drawer.eli15-drawer-open {
    transform: translateX(0);
}
/* Defensive: style.css has a global `p { line-height: .2em; }` that leaks
 * into anything we render. Scope every text element inside the drawer so
 * that cascade rule can't crush our paragraphs into illegible slivers. */
.eli15-drawer p {
    line-height: 1.5;
    margin: 0 0 0.7em 0;
}
.eli15-drawer h2, .eli15-drawer h3 { line-height: 1.25; }
@media (prefers-reduced-motion: reduce) {
    .eli15-drawer { transition: none; }
    .eli15-backdrop { transition: none; }
    .eli15-fab { transition: none; }
}

/* ─── drawer header ────────────────────────────────────────────────────── */
.eli15-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5em;
    padding: 0.9em 1em 0.75em 1em;
    background: #fff4e2;
    border-bottom: 2px solid #d38b4b;
    flex-shrink: 0;
}
.eli15-header-text { flex: 1; min-width: 0; }
.eli15-kicker {
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #a07e5a;
    margin-bottom: 0.2em;
}
.eli15-title {
    font-size: 1.05rem;
    margin: 0 0 0.25em 0;
    color: #824006;
    line-height: 1.25;
}
.eli15-oneliner {
    font-size: 0.82rem;
    margin: 0;
    color: #555;
    font-style: italic;
}
.eli15-close {
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: #824006;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.1em 0.35em;
    border-radius: 0.2em;
}
.eli15-close:hover { background: rgba(131, 64, 6, 0.08); }
.eli15-close:focus-visible {
    outline: 2px solid #d38b4b;
    outline-offset: 1px;
}

/* ─── drawer body ──────────────────────────────────────────────────────── */
.eli15-body {
    padding: 0.8em 1em 0.4em 1em;
    overflow-y: auto;
    flex: 1 1 auto;
}
.eli15-body p {
    line-height: 1.5;
    margin: 0 0 0.7em 0;
}
.eli15-body h3 {
    font-size: 0.95rem;
    color: #824006;
    margin: 0.8em 0 0.25em 0;
}
.eli15-body code {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 0.85em;
    background: #f4ead9;
    padding: 0 0.25em;
    border-radius: 0.2em;
}
.eli15-body strong { color: #222; }

.eli15-loading { color: #888; font-style: italic; }
.eli15-error { color: #933; }
.eli15-error-detail {
    background: #fff0f0;
    color: #933;
    padding: 0.4em 0.6em;
    border-radius: 0.25em;
    font-size: 0.75rem;
    white-space: pre-wrap;
}

.eli15-diagram {
    padding: 0.4em 1em 0.6em 1em;
    background: #faf5ec;
    border-top: 1px dashed #e0d3bd;
    flex-shrink: 0;
}
.eli15-ascii {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 0.72rem;
    line-height: 1.35;
    color: #333;
    margin: 0;
    white-space: pre;
    overflow-x: auto;
}

.eli15-related {
    padding: 0.5em 1em 0.9em 1em;
    border-top: 1px solid #eee;
    flex-shrink: 0;
}
.eli15-related-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #888;
    margin-bottom: 0.3em;
}
.eli15-related-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.15em;
}
.eli15-related-link {
    color: #824006;
    text-decoration: none;
    font-size: 0.82rem;
}
.eli15-related-link:hover { text-decoration: underline; }