/* Interactive JS-driven chrome: command palette (cmd+k), code-copy buttons,
   and the 404 terminal. All colours via --app-* tokens (no raw hex). */

/* --- Command palette ----------------------------------------------------- */
.app-palette {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 12vh 1rem 1rem;
    background: rgba(1, 4, 9, 0.62);
}

.app-palette[hidden] {
    display: none;
}

.app-palette__box {
    width: 100%;
    max-width: 40rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border-strong);
    border-radius: var(--app-radius-lg);
    box-shadow: var(--app-shadow);
    overflow: hidden;
}

.app-palette__input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.85rem 1rem;
    border: 0;
    border-bottom: 1px solid var(--app-border);
    background: var(--app-bg-soft);
    color: var(--app-text-strong);
    font-family: var(--app-font-mono);
    font-size: 0.95rem;
}

.app-palette__input:focus {
    outline: none;
}

.app-palette__input:focus-visible {
    outline: 2px solid var(--app-green);
    outline-offset: 2px;
}

.app-palette__list {
    list-style: none;
    margin: 0;
    padding: 0.35rem;
    max-height: 50vh;
    overflow-y: auto;
}

.app-palette__item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--app-radius);
    cursor: pointer;
    font-family: var(--app-font-mono);
    font-size: 0.9rem;
    color: var(--app-text);
}

.app-palette__item.is-active {
    background: var(--app-green-soft);
    color: var(--app-text-strong);
}

.app-palette__label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-palette__kind {
    flex: none;
    color: var(--app-faint);
    font-size: 0.72rem;
    text-transform: lowercase;
}

.app-palette__empty {
    padding: 0.75rem;
    color: var(--app-muted);
    font-family: var(--app-font-mono);
    font-size: 0.85rem;
    text-align: center;
}

body.app-palette-open {
    overflow: hidden;
}

/* --- Code-block copy button --------------------------------------------- */
.app-prose .codehilite {
    position: relative;
}

.app-code-copy {
    position: absolute;
    top: 0.4rem;
    right: 0.4rem;
    /* WCAG 2.5.8: keep the standalone control at least 24x24px. */
    min-height: 24px;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--app-border-strong);
    border-radius: var(--app-radius-sm);
    background: var(--app-surface-2);
    color: var(--app-muted);
    font-family: var(--app-font-mono);
    font-size: 0.72rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--app-transition), color var(--app-transition);
}

.app-prose .codehilite:hover .app-code-copy,
.app-code-copy:focus-visible {
    opacity: 1;
}

.app-code-copy:hover {
    color: var(--app-text-strong);
    border-color: var(--app-green);
}

.app-code-copy.is-copied {
    opacity: 1;
    color: var(--app-green);
    border-color: var(--app-green);
}

/* --- 404 terminal -------------------------------------------------------- */
.app-shell404 {
    margin-top: 1.25rem;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-lg);
    background: var(--app-bg-soft);
    font-family: var(--app-font-mono);
    font-size: 0.85rem;
}

.app-shell404[hidden] {
    display: none;
}

.app-shell404__output {
    max-height: 11rem;
    overflow-y: auto;
    margin-bottom: 0.4rem;
}

.app-shell404__row {
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--app-text);
    line-height: 1.5;
}

.app-shell404__row a {
    color: var(--app-link);
}

.app-shell404__echo {
    color: var(--app-faint);
}

.app-shell404__err {
    color: var(--app-danger);
}

.app-shell404__line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-shell404__prompt {
    flex: none;
    color: var(--app-green);
}

.app-shell404__input {
    flex: 1;
    min-width: 0;
    border: 0;
    background: transparent;
    color: var(--app-text-strong);
    font-family: var(--app-font-mono);
    font-size: 0.85rem;
}

.app-shell404__input:focus {
    outline: none;
}

.app-shell404__input:focus-visible {
    outline: 2px solid var(--app-green);
    outline-offset: 2px;
}

/* --- Reading pager (post detail) ----------------------------------------- */
/* A less-style status line pinned to the viewport bottom: progress, current
   section, time left, an outline popover and keyboard help. Enhanced by
   app.js; the markup ships hidden, so no-JS readers never see it. */
body.app-reader-on {
    padding-bottom: 2.5rem;
}

/* Keep the floating outline rail clear of the status line. */
body.app-reader-on .app-detail__rail {
    max-height: calc(100vh - 9.5rem);
}

.app-reader {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 60;
    border-top: 1px solid var(--app-border-strong);
    background: var(--app-surface-2);
    font-family: var(--app-font-mono);
    font-size: 0.78rem;
    color: var(--app-muted);
}

.app-reader[hidden] {
    display: none;
}

.app-reader__progress {
    position: absolute;
    top: -1px;
    right: 0;
    left: 0;
    height: 2px;
}

/* Width driven by --app-reader-progress (0–1), set via CSSOM from app.js. */
.app-reader__fill {
    display: block;
    height: 100%;
    background: var(--app-green);
    transform: scaleX(var(--app-reader-progress, 0));
    transform-origin: left center;
}

.app-reader__inner {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    width: min(100% - 2rem, var(--app-content-width));
    min-height: 2.4rem;
    margin-inline: auto;
}

.app-reader__file {
    flex-shrink: 1;
    max-width: 16rem;
    overflow: hidden;
    color: var(--app-faint);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-reader__section {
    display: flex;
    flex: 1 1 auto;
    align-items: center;
    gap: 0.45rem;
    min-width: 0;
    padding: 0.25rem 0.5rem;
    border: 0;
    border-radius: var(--app-radius);
    background: none;
    color: var(--app-text-strong);
    font: inherit;
    text-align: left;
}

.app-reader__section::before {
    flex-shrink: 0;
    color: var(--app-green);
    content: "§";
}

button.app-reader__section {
    cursor: pointer;
}

button.app-reader__section:hover,
button.app-reader__section[aria-expanded="true"] {
    background: var(--app-green-soft);
}

.app-reader__section-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-reader__stats {
    display: inline-flex;
    flex-shrink: 0;
    gap: 0.6rem;
}

.app-reader__percent {
    min-width: 4ch;
    padding: 0 0.3rem;
    color: var(--app-green);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* less shows (END) in reverse video. */
.app-reader.is-end .app-reader__percent {
    background: var(--app-text-strong);
    color: var(--app-bg);
}

.app-reader__next {
    flex-shrink: 0;
    color: var(--app-link);
}

.app-reader__next:hover {
    color: var(--app-link-hover);
}

.app-reader__help {
    flex-shrink: 0;
    width: 1.6rem;
    height: 1.6rem;
    padding: 0;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-sm);
    background: none;
    color: var(--app-muted);
    font: inherit;
    cursor: pointer;
}

.app-reader__help:hover,
.app-reader__help[aria-expanded="true"] {
    border-color: var(--app-border-strong);
    color: var(--app-text-strong);
}

.app-reader button:focus-visible,
.app-reader a:focus-visible {
    outline: 2px solid var(--app-green);
    outline-offset: 2px;
}

/* Popovers open upwards from the bar; the outline reuses the .app-toc look. */
.app-reader__pop {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 50%;
    width: min(100% - 2rem, 36rem);
    max-height: min(60vh, 32rem);
    box-sizing: border-box;
    margin: 0;
    padding: 0.85rem 1.1rem;
    overflow-y: auto;
    border: 1px solid var(--app-border-strong);
    border-left: 2px solid var(--app-green);
    border-radius: var(--app-radius-lg);
    background: var(--app-bg-soft);
    box-shadow: var(--app-shadow);
    font-family: var(--app-font-sans);
    font-size: 0.92rem;
    transform: translateX(-50%);
}

.app-reader__pop[hidden] {
    display: none;
}

.app-reader__keys {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.4rem 1rem;
    margin: 0 0 1rem;
    font-family: var(--app-font-mono);
    font-size: 0.82rem;
}

.app-reader__keys dt {
    white-space: nowrap;
}

.app-reader__keys dd {
    margin: 0;
    color: var(--app-text);
}

/* Phones: no keyboard, little room — keep section + progress only. */
@media (max-width: 575.98px) {
    .app-reader__file,
    .app-reader__help,
    .app-reader__left {
        display: none;
    }
}