/* Presentation decks (map-and-zoom). Built on the variables in style.css. */

:root {
    --chart-1: var(--color-accent);        /* deep slate */
    --chart-2: var(--color-link);          /* blue */
    --chart-3: #16a085;                    /* teal, darkened from the accent hover for projector contrast */
    --chart-4: #d35400;                    /* warm orange, generative AI */
    --chart-5: #8e44ad;                    /* purple, ChatGPT */
    --chart-gray: #7f8c8d;
    --chart-muted: #b8c0c8;
    --chart-grid: var(--color-border);
    --zd-bar-h: 52px;
    --zd-ease: cubic-bezier(0.45, 0, 0.2, 1);
    --zd-zoom-ms: 700ms;
}

/* ---------- Index page (/presentations) ---------- */

.presentations-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-lg);
}

.presentation-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    margin-top: var(--spacing-md);
}

.presentation-card h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.presentation-card .presentation-meta {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.presentation-card ul {
    margin: var(--spacing-sm) 0 0 1.25rem;
}

.presentation-card .btn {
    margin-top: var(--spacing-sm);
}

/* ---------- Deck shell ---------- */

html.zd-page,
html.zd-page body {
    height: 100%;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.zd {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    font-family: var(--font-primary);
    color: var(--color-text-primary);
}

.zd-bar {
    height: var(--zd-bar-h);
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    z-index: 5;
}

.zd-bar-title {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.zd-bar-title a { color: inherit; }

.zd-crumb {
    flex: 1;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.zd-controls {
    display: flex;
    gap: 6px;
    align-items: center;
}

.zd-btn {
    font: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: border-color var(--transition), color var(--transition);
}

.zd-btn:hover,
.zd-btn:focus-visible {
    border-color: var(--color-accent-hover);
    color: var(--color-accent-hover);
}

.zd-btn kbd {
    font-family: inherit;
    font-size: 0.75em;
    color: var(--color-text-secondary);
    margin-left: 4px;
}

.zd-home {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.zd-viewport {
    flex: 1 1 auto;
    position: relative;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.zd-canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 1600px;
    height: 900px;
    transform-origin: 0 0;
    transition: transform var(--zd-zoom-ms) var(--zd-ease);
    will-change: transform;
}

.zd--no-anim .zd-canvas,
.zd--no-anim .zd-tile,
.zd--no-anim .zd-section,
.zd--no-anim .zd-slide {
    transition: none !important;
}

/* ---------- Map ---------- */

.zd-map {
    position: absolute;
    left: 0;
    top: 0;
    width: 1600px;
    height: 900px;
    background: var(--color-bg-primary);
    transition: opacity 300ms var(--zd-ease);
}

.zd-map-head {
    position: absolute;
    left: 88px;
    right: 88px;
    top: 64px;
    text-align: center;
}

.zd-map-head h1 {
    font-size: 64px;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

.zd-map-subtitle {
    font-size: 30px;
    color: var(--color-text-secondary);
    margin: 0 0 12px;
}

.zd-map-byline {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin: 0;
}

.zd-tiles {
    list-style: none;
    margin: 0;
    padding: 0;
}

.zd-tile {
    position: absolute;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 24px 28px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: border-color 200ms var(--zd-ease), box-shadow 200ms var(--zd-ease), transform 200ms var(--zd-ease), opacity 300ms var(--zd-ease);
}

.zd-tile:hover,
.zd-tile:focus-visible {
    border-color: var(--color-accent-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    color: var(--color-text-primary);
}

.zd-tile-num {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 26px;
    color: var(--color-accent-hover);
    letter-spacing: 0.05em;
}

.zd-tile-title {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 36px;
    line-height: 1.15;
    color: var(--color-accent);
    margin: 10px 0;
}

.zd-tile-meta {
    font-size: 20px;
    color: var(--color-text-secondary);
    display: flex;
    justify-content: space-between;
}

.zd-tile-visited { display: none; color: var(--color-accent-hover); font-weight: 600; }
.zd-tile.is-visited .zd-tile-visited { display: inline; }
.zd-tile.is-visited { border-color: #cfd8dc; }

.zd-map-hint {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 22px;
    text-align: center;
    font-size: 18px;
    color: var(--color-text-secondary);
}

/* ---------- Sections and slides on the plane ---------- */

.zd-stage { position: absolute; left: 0; top: 0; width: 0; height: 0; }

.zd-section {
    position: absolute;
    width: 1600px;
    height: 900px;
    transform-origin: 0 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 350ms var(--zd-ease), visibility 0s linear 350ms;
}

.zd-section.is-current {
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
}

.zd--zoom.zd--on-slide .zd-tile.is-current { opacity: 0; }
.zd--zoom.zd--on-slide .zd-map { opacity: 0; transition-delay: 150ms; }
.zd--zoom .zd-viewport { background: #d9dee5; }

.zd-slide {
    position: absolute;
    inset: 0;
    width: 1600px;
    height: 900px;
    box-sizing: border-box;
    padding: 56px 88px 48px;
    background: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
    font-size: 24px;
    line-height: 1.4;
    opacity: 0;
    visibility: hidden;
    transition: opacity 250ms var(--zd-ease), visibility 0s linear 250ms;
    overflow: hidden;
}

.zd-slide.is-active {
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
}

.zd-slide h2 {
    font-size: 2.5em;
    line-height: 1.1;
    margin: 0 0 0.4em;
    letter-spacing: -0.015em;
}

.zd-slide .zd-lead {
    font-size: 1.3em;
    color: var(--color-text-secondary);
    margin: 0 0 0.6em;
}

.zd-slide .zd-chart-note {
    font-size: 1.05em;
    color: var(--color-text-secondary);
    margin: -0.3em 0 0.5em;
}

.zd-body {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.zd-bullets {
    font-size: 1.5em;
    line-height: 1.4;
    margin: 0;
    padding-left: 1.1em;
}

.zd-bullets li { margin-bottom: 0.45em; }
.zd-bullets li:last-child { margin-bottom: 0; }

.zd-bullets a { color: var(--color-link); text-decoration: underline; text-decoration-color: var(--color-border); text-underline-offset: 3px; }
.zd-bullets a:hover { color: var(--color-accent-hover); }

ol.zd-bullets { padding-left: 1.4em; }
ol.zd-bullets li::marker { color: var(--color-accent-hover); font-weight: 600; }

.zd-bullets--dense {
    font-size: 1.15em;
    columns: 2;
    column-gap: 56px;
}
.zd-bullets--dense li { break-inside: avoid; margin-bottom: 0.4em; }

.zd-bullets--small { font-size: 1.15em; }
.zd-bullets--plain { list-style: none; padding-left: 0; color: var(--color-text-secondary); margin-top: 0.4em; }
.zd-bullets--small li { margin-bottom: 0.3em; }

.zd-slide--title { justify-content: center; align-items: center; text-align: center; }
.zd-slide--title h2 { font-size: 3.4em; margin-bottom: 0.3em; }
.zd-slide--title .zd-bullets { list-style: none; padding: 0; font-size: 1.4em; color: var(--color-text-secondary); }

/* Two-column layouts */
.zd-cols {
    display: flex;
    gap: 56px;
    align-items: stretch;
    flex: 1 1 auto;
    min-height: 0;
}

.zd-col-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }
.zd-col-side { flex: 0 0 420px; display: flex; flex-direction: column; justify-content: center; gap: 36px; }

.zd-figure {
    flex: 0 0 820px;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.zd-figure img {
    width: 100%;
    max-height: 600px;
    object-fit: contain;
    object-position: left top;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.zd-figure figcaption {
    font-size: 0.9em;
    color: var(--color-text-secondary);
    margin-top: 12px;
}

.zd-callout .zd-callout-big {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 3.2em;
    line-height: 1;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

.zd-callout .zd-callout-text {
    font-size: 1.1em;
    color: var(--color-text-secondary);
    margin-top: 6px;
    line-height: 1.3;
}

.zd-quote {
    margin: 0.8em 0 0 1.1em;
    padding: 0.4em 0 0.4em 1em;
    border-left: 4px solid var(--color-border);
    font-size: 1.05em;
    line-height: 1.45;
    color: var(--color-text-secondary);
    font-style: italic;
}

.zd-takeaway {
    margin-top: auto;
    padding: 18px 26px;
    border-left: 6px solid var(--color-accent-hover);
    background: var(--color-bg-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 1.3em;
    line-height: 1.35;
}

.zd-takeaway strong { color: var(--color-accent); font-family: var(--font-heading); font-weight: 700; margin-right: 0.4em; }

.zd-note {
    margin-top: auto;
    padding-top: 12px;
    font-size: 0.78em;
    line-height: 1.35;
    color: var(--color-text-secondary);
}

.zd-note p { margin: 0 0 2px; }

.zd-after {
    margin-top: 18px;
    font-size: 1.2em;
    line-height: 1.4;
}

.zd-after p { margin: 0 0 0.3em; }

/* Tables */
.zd-table-wrap { overflow: auto; min-height: 0; }

.zd-table {
    border-collapse: collapse;
    font-size: 0.82em;
    line-height: 1.25;
    width: 100%;
    font-variant-numeric: tabular-nums;
}

.zd-table th,
.zd-table td {
    padding: 4px 10px;
    text-align: right;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.zd-table th { font-family: var(--font-heading); font-weight: 500; color: var(--color-accent); border-bottom: 2px solid var(--color-accent); }
.zd-table th:first-child, .zd-table td:first-child { text-align: left; font-weight: 600; }
.zd-table td.is-new { background: #e8f8f5; color: #0e6655; font-weight: 600; }
.zd-table--compact { font-size: 0.78em; }
.zd-table--compact th, .zd-table--compact td { padding: 2px 10px; }
.zd-table--wide { font-size: 0.78em; }
.zd-table--wide th { white-space: normal; line-height: 1.15; vertical-align: bottom; }
.zd-table--wide th, .zd-table--wide td { padding: 2px 8px; }
.zd-table--roomy { font-size: 1.05em; }
.zd-table--roomy th, .zd-table--roomy td { padding: 10px 16px; }

.zd-table-key { font-size: 0.75em; color: var(--color-text-secondary); margin-top: 8px; }
.zd-table-key .is-new { padding: 0 6px; margin-right: 4px; }

/* Charts */
.zd-chart { flex: 1 1 auto; min-height: 0; display: flex; align-items: center; }
.zd-chart svg { width: 100%; height: auto; max-height: 100%; display: block; overflow: visible; }

.chart text { font-family: var(--font-primary); fill: var(--color-text-primary); }
.chart .chart-label { font-size: 25px; }
.chart .chart-value { font-size: 26px; font-weight: 600; fill: var(--color-accent); }
.chart .chart-tick { font-size: 22px; fill: var(--color-text-secondary); }
.chart .chart-grid { stroke: var(--chart-grid); stroke-width: 1.5; }
.chart .chart-axis { stroke: var(--color-text-secondary); stroke-width: 2; }
.chart .chart-tickmark { stroke: var(--color-text-secondary); stroke-width: 2; }
.chart .chart-axis-title { font-size: 22px; fill: var(--color-text-secondary); }
.chart .chart-series.is-muted path { stroke: var(--chart-muted); stroke-width: 4; }
.chart .chart-series.is-muted circle { fill: var(--chart-muted); }
.chart .chart-series.is-muted text { fill: var(--chart-gray); }
.chart .chart-series.is-dashed path { stroke-dasharray: 10 10; }
.chart .chart-point-label { font-size: 22px; font-weight: 600; }
.chart .chart-end-label { font-size: 24px; font-weight: 600; }
.chart .chart-marker-label { font-size: 23px; font-weight: 600; }
.chart .chart-marker.is-muted circle { stroke: var(--chart-muted); }
.chart .chart-marker.is-muted text { fill: var(--chart-gray); }
.chart .chart-marker-leader { stroke-width: 2; stroke-dasharray: 3 6; opacity: 0.7; }
.chart .chart-slope { stroke-width: 3; stroke-dasharray: 4 10; stroke-linecap: round; }
.chart .chart-vline { stroke: var(--chart-4); stroke-width: 3; stroke-dasharray: 10 8; }
.chart .chart-vline-label { font-size: 22px; font-weight: 600; fill: var(--chart-4); }
.chart .chart-legend text { font-size: 22px; }
.chart .chart-legend.is-muted text { fill: var(--chart-gray); }
.chart .chart-row rect, .chart .chart-col rect, .chart .chart-point { transition: opacity 150ms; }
.chart .chart-row:hover rect, .chart .chart-col:hover rect { opacity: 0.8; }

.zd-tip {
    position: fixed;
    z-index: 50;
    pointer-events: none;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.9rem;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transition: opacity 120ms;
    max-width: 320px;
}
.zd-tip.is-visible { opacity: 1; }

/* ---------- Flat mode: narrow windows or reduced motion ---------- */

.zd--flat .zd-viewport { overflow: auto; -webkit-overflow-scrolling: touch; }
.zd--flat .zd-canvas { position: static; width: auto; height: auto; transform: none !important; transition: none; }
.zd--flat .zd-map { position: static; width: auto; height: auto; padding: var(--spacing-md) var(--spacing-sm); }
.zd--flat.zd--on-slide .zd-map { display: none; }
.zd--flat .zd-map-head { position: static; text-align: left; margin-bottom: var(--spacing-md); }
.zd--flat .zd-map-head h1 { font-size: 2rem; }
.zd--flat .zd-map-subtitle { font-size: 1.15rem; }
.zd--flat .zd-map-byline { font-size: 0.95rem; }
.zd--flat .zd-tiles { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.zd--flat .zd-tile { position: static !important; width: auto !important; height: auto !important; padding: var(--spacing-sm); transform: none; }
.zd--flat .zd-tile-num { font-size: 0.85rem; }
.zd--flat .zd-tile-title { font-size: 1.3rem; margin: 4px 0; }
.zd--flat .zd-tile-meta { font-size: 0.9rem; }
.zd--flat .zd-map-hint { display: none; }

.zd--flat .zd-stage { position: static; width: auto; height: auto; }
.zd--flat .zd-section { position: static; width: auto; height: auto; transform: none !important; display: none; opacity: 1; visibility: visible; transition: none; padding: var(--spacing-sm); }
.zd--flat .zd-section.is-current { display: block; }
.zd--flat .zd-section-head { display: block; font-family: var(--font-heading); color: var(--color-accent); font-size: 1.1rem; margin: 0 0 var(--spacing-sm); }
.zd--flat .zd-slide {
    position: static; width: auto; height: auto; inset: auto;
    opacity: 1; visibility: visible; transition: none;
    font-size: 16px; padding: var(--spacing-sm); margin-bottom: var(--spacing-sm);
    border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
    overflow: visible; display: block;
}
.zd--flat .zd-slide.is-active { border-color: var(--color-accent-hover); }
.zd--flat .zd-slide h2 { font-size: 1.5em; }
.zd--flat .zd-slide .zd-lead { font-size: 1.05em; }
.zd--flat .zd-bullets { font-size: 1.05em; }
.zd--flat .zd-bullets--dense { columns: 1; font-size: 1em; }
.zd--flat .zd-cols { display: block; }
.zd--flat .zd-col-side { flex-direction: row; flex-wrap: wrap; gap: var(--spacing-sm); margin-top: var(--spacing-sm); }
.zd--flat .zd-callout .zd-callout-big { font-size: 2em; }
.zd--flat .zd-figure { flex: none; }
.zd--flat .zd-figure img { max-height: none; }
.zd--flat .zd-takeaway { margin-top: var(--spacing-sm); font-size: 1.05em; }
.zd--flat .zd-note { margin-top: var(--spacing-sm); }
.zd--flat .zd-chart { display: block; margin: var(--spacing-sm) 0; }
.zd--flat .zd-table { font-size: 0.85em; }
.zd--flat .zd-slide--title { text-align: left; align-items: flex-start; }
.zd--flat .zd-slide--title h2 { font-size: 1.8em; }
.zd--flat .zd-crumb { display: none; }
.zd--flat .zd-btn kbd { display: none; }

.zd-section-head { display: none; }

@media (max-width: 600px) {
    .zd-bar { gap: 8px; padding: 0 8px; }
    .zd-bar-title { font-size: 0.9rem; }
    .zd-home { display: none; }
    .zd-btn { padding: 6px 8px; }
}

.zd-slide-id { display: none; }

/* ---------- Print view (?print=1): one 16:9 page per slide, used for the PDF ---------- */

@page { size: 1600px 900px; margin: 0; }

html.zd-print, html.zd-print body { height: auto; overflow: visible; background: #fff; }
html.zd-print .zd { position: static; display: block; }
html.zd-print .zd-bar { display: none; }
html.zd-print .zd-viewport { overflow: visible; background: #fff; }
html.zd-print .zd-canvas { position: static; width: 1600px; height: auto; transform: none; transition: none; }
html.zd-print .zd-map { position: relative; width: 1600px; height: 900px; page-break-after: always; break-after: page; }
html.zd-print .zd-tiles { position: absolute; left: 88px; top: 300px; display: grid; grid-template-columns: repeat(3, 448px); grid-auto-rows: 252px; gap: 40px; }
html.zd-print .zd-tile { position: static; width: auto; height: auto; transform: none; box-shadow: none; }
html.zd-print .zd-tile-visited { display: none !important; }
html.zd-print .zd-map-hint { display: none; }
html.zd-print .zd-stage { position: static; width: auto; height: auto; }
html.zd-print .zd-section { position: static; width: 1600px; height: auto; transform: none !important; opacity: 1; visibility: visible; transition: none; }
html.zd-print .zd-section-head { display: none; }
html.zd-print .zd-slide { position: relative; inset: auto; opacity: 1; visibility: visible; transition: none; page-break-after: always; break-after: page; page-break-inside: avoid; break-inside: avoid; }
html.zd-print .zd-slide-id { display: block; position: absolute; right: 48px; bottom: 20px; font-size: 16px; color: var(--color-text-secondary); }
html.zd-print .zd-tip { display: none; }
html.zd-print * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }

.zd-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }