/* ── Page shape: sticky contents on the left, text on the right ────── */
.help-page {
    display: grid;
    grid-template-columns: 240px minmax(0, 760px);
    justify-content: center;
    align-items: start;
    gap: 40px;
    padding: 48px 24px 96px;
}

/* Same panel as the analysis sidebars (.pe-sidebar) */
.help-contents {
    position: sticky;
    top: 24px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 14px;
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.help-contents-header {
    margin-bottom: 8px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
}

.help-contents-link {
    display: block;
    padding: 6px 10px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 13.5px;
    color: var(--color-text-main);
    text-decoration: none;
    transition: border-color 0.15s, background-color 0.15s;
}

.help-contents-link:hover {
    border-color: var(--color-accent-light);
}

.help-contents-link--level-1 {
    font-weight: 600;
}

.help-contents-link--level-1:not(:first-of-type) {
    margin-top: 6px;
}

.help-contents-link--level-2 {
    margin-left: 14px;
    font-size: 13px;
    color: var(--color-text-muted);
}

/* Same selected look as a sidebar card */
.help-contents-link.active {
    background-color: rgba(var(--color-accent-rgb), 0.1);
    border-color: var(--color-accent);
    color: var(--color-text-main);
}

/* ── Sections ──────────────────────────────────────────────────────── */
.help-section {
    scroll-margin-top: 24px;
}

.help-section--level-1 {
    margin-top: 48px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border);
}

.help-body > .page-title + .help-section--level-1 {
    margin-top: 24px;
    padding-top: 0;
    border-top: none;
}

.help-section--level-2 {
    margin-top: 32px;
}

.help-heading {
    margin: 0 0 12px;
    font-weight: 700;
    color: var(--color-text-main);
}

h2.help-heading {
    font-size: 24px;
    letter-spacing: -0.3px;
}

h3.help-heading {
    font-size: 18px;
}

.help-markdown {
    font-size: 14.5px;
    line-height: 1.65;
    color: var(--color-text-main);
}

.help-markdown p,
.help-markdown ul,
.help-markdown ol {
    margin: 0 0 12px;
}

.help-markdown h4 {
    margin: 20px 0 8px;
    font-size: 15px;
}

.help-markdown a {
    color: var(--color-accent);
}

.help-markdown code {
    padding: 1px 5px;
    border-radius: 4px;
    background-color: rgba(var(--color-accent-rgb), 0.1);
    font-size: 13px;
}

.help-markdown table {
    margin: 0 0 12px;
    border-collapse: collapse;
    font-size: 13.5px;
}

.help-markdown th,
.help-markdown td {
    padding: 6px 10px;
    border: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.help-markdown th {
    background-color: var(--color-bg-surface);
}

/* ── Media ─────────────────────────────────────────────────────────── */
.help-figure {
    margin: 8px 0 20px;
}

.help-image,
.help-video {
    display: block;
    border: 1px solid var(--color-border);
    border-radius: 10px;
}

/* Each image carries its own width/height (pages/help.py), so it fills the
   column only as far as its pixels allow -- a screenshot stretched past its
   own size is what looks blurry */
.help-image {
    max-width: 100%;
    height: auto;
}

.help-video {
    width: 100%;
}

/* Parts share one grid cell, so the spot keeps the tallest part's height
   and nothing below jumps when switching. Shrunk to the widest part so the
   1/2/... buttons sit on the image and not beside it */
.help-image-stack {
    position: relative;
    display: grid;
    width: fit-content;
    max-width: 100%;
}

.help-image-stack > .help-image {
    grid-area: 1 / 1;
}

.help-image-stack > .help-image:not(.active) {
    visibility: hidden;
}

.help-part-buttons {
    position: absolute;
    left: 12px;
    bottom: 12px;
    display: flex;
    gap: 6px;
}

.help-part-button {
    width: 30px;
    height: 30px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-bg-surface);
    color: var(--color-text-main);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(var(--color-shadow-rgb), 0.18);
}

.help-part-button:hover {
    border-color: var(--color-accent-light);
}

.help-part-button.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

:root[data-theme="dark"] .help-part-button.active {
    color: var(--color-bg-page);
}

.help-video {
    margin: 4px 0 20px;
    background-color: #000000;
}

.help-caption {
    margin-top: 6px;
    font-size: 12.5px;
    color: var(--color-text-muted);
}

.help-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 140px;
    margin: 8px 0 20px;
    padding: 16px;
    border: 2px dashed var(--color-border);
    border-radius: 10px;
    text-align: center;
    color: var(--color-text-muted);
}

.help-placeholder-icon {
    font-size: 22px;
}

.help-placeholder-file {
    font-family: monospace;
    font-size: 12.5px;
}

.help-placeholder-caption {
    font-size: 13px;
}

/* ── Enlarged view (assets/help_image_zoom.js) ──────────────────────
   Same shape as Project Evaluation's plot zoom (.pe-zoom-modal-*), but
   holding a clone of the image's own stack, so an image saved in numbered
   steps keeps its 1/2/... buttons in here too. */
.help-image {
    cursor: zoom-in;
}

.help-zoom-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    padding: 0;
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-muted);
    cursor: pointer;
    opacity: 0.85;
    box-shadow: 0 2px 8px rgba(var(--color-shadow-rgb), 0.18);
    transition: color 0.15s, border-color 0.15s, opacity 0.15s;
}

.help-zoom-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    opacity: 1;
}

/* Two opposite corner brackets, as on a plot widget's expand button */
.help-zoom-icon {
    position: relative;
    display: inline-block;
    width: 12px;
    height: 12px;
}

.help-zoom-icon::before,
.help-zoom-icon::after {
    content: "";
    position: absolute;
    width: 6px;
    height: 6px;
    border: 1.5px solid currentColor;
}

.help-zoom-icon::before {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.help-zoom-icon::after {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
}

.help-zoom-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.5);
}

.help-zoom-modal-overlay--hidden {
    display: none;
}

.help-zoom-modal-dialog {
    display: flex;
    flex-direction: column;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 32px);
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(var(--color-shadow-rgb), 0.3);
    overflow: hidden;
}

.help-zoom-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border);
}

.help-zoom-modal-title {
    flex: 1;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text-main);
}

.help-zoom-modal-hint {
    flex: none;
    font-size: 12.5px;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.help-zoom-modal-close-btn {
    padding: 2px 7px;
    background: none;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    line-height: 1;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: color 0.15s, background-color 0.15s;
}

.help-zoom-modal-close-btn:hover {
    color: var(--color-accent);
    background-color: rgba(var(--color-accent-rgb), 0.08);
}

.help-zoom-modal-body {
    padding: 18px;
    overflow: auto;
}

/* The stack is given a px width by help_image_zoom.js; the parts fill it */
.help-zoom-modal-body .help-image {
    width: 100%;
    max-width: none;
    cursor: default;
}

/* ── Narrow screens: contents above the text ───────────────────────── */
@media (max-width: 860px) {
    .help-page {
        grid-template-columns: minmax(0, 1fr);
        gap: 24px;
        padding-top: 32px;
    }

    .help-contents {
        position: static;
        max-height: none;
    }
}