/* Presentation-style layout for the Whirlwind Tour chapter only.
   Every rule is scoped under .tour so the rest of the book is unaffected.
   Colors use mdBook theme variables to stay correct in light and dark themes. */

.tour {
    font-size: 1em;
    line-height: 1.65;
}

/* Each H2 opens a "slide" */
.tour h2 {
    margin-top: 2.2em;
    padding-top: 1.2em;
    border-top: 3px solid var(--quote-border, #d0d0d0);
    font-size: 2em;
    letter-spacing: -0.01em;
}

.tour .slide-kicker {
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.5em;
    opacity: 0.6;
    margin-bottom: 0.4em;
}

/* Big opening statement of a slide */
.tour .lead {
    line-height: 1.6;
    margin: 0.8em 0 1em 0;
}

.tour .lead strong {
    font-weight: 600;
}

/* Oversized single-line takeaway */
.tour .takeaway {
    font-size: 1em;
    font-weight: 600;
    text-align: center;
    margin: 1.2em auto;
    padding: 0.7em 1em;
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-radius: 12px;
    max-width: 34em;
}

/* Footer of each slide: where the book goes deeper */
.tour .goes-deeper {
    margin-top: 1.4em;
    font-size: 0.85em;
    opacity: 0.75;
}

.tour .goes-deeper::before {
    content: "Goes deeper \2192   ";
    font-weight: 600;
}

/* Center mermaid diagrams and give them presentation margins */
.tour pre.mermaid,
.tour .mermaid {
    display: flex;
    justify-content: center;
    margin: 1.4em auto;
}

/* Relationship edges are the point of the diagrams — keep them visible
   against both themes (mermaid's defaults nearly vanish on dark).
   Book-wide on purpose: every chapter's diagrams share this problem. */
.mermaid svg path.flowchart-link,
.mermaid svg .edgePath path,
.mermaid svg .messageLine0,
.mermaid svg .messageLine1 {
    stroke: #8a9099 !important;
    stroke-width: 1.8px !important;
}

.mermaid svg marker path {
    fill: #8a9099 !important;
    stroke: #8a9099 !important;
}

.mermaid svg .edgeLabel {
    color: #8a9099;
}

/* Collapsible diagrams: tour.js turns each .fold into a toggle + body.
   Closed folds keep layout width (height collapse, no display:none) so
   mermaid renders correctly while hidden. */
.tour .fold {
    margin: 1.2em 0;
}

.tour .fold__toggle {
    display: block;
    width: 100%;
    text-align: left;
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    color: inherit;
    border: none;
    border-radius: 10px;
    padding: 0.55em 1em;
    font-family: inherit;
    font-size: 0.92em;
    font-weight: 600;
    cursor: pointer;
}

.tour .fold__toggle:hover {
    background: rgba(128, 128, 128, 0.18);
}

.tour .fold--closed .fold__body {
    height: 0;
    overflow: hidden;
}

/* Hiding the sidebar (the ☰ toggle) widens the reading panel on pages that
   carry the tour deck; prose chapters keep the default 750px measure. */
html.sidebar-hidden .content main:has(.tour) {
    max-width: 1250px;
}

/* Slide panels. A .slide is a bordered page-colored canvas: kicker, one
   headline sentence, a visual (nodes flow or tiles row), a small note.
   Standalone .slide--top panels carry their own chrome; inside a .sec the
   panel chrome sits on the .sec card instead. */
.tour .slide--top,
.tour .sec {
    position: relative;
    background: var(--bg, #fff);
    border: 1px solid var(--quote-border, #ccc);
    border-radius: 12px;
    margin: 1em 0;
    overflow: hidden;
}

.tour .slide--top {
    padding: 1em 1.3em 0.8em;
}

.tour .slide-kick {
    font-size: 0.82em;
    font-weight: 600;
    letter-spacing: 0.05em;
    opacity: 0.55;
    margin: 0 0 0.2em;
}

.tour .slide-line {
    font-size: 1.14em;
    font-weight: 600;
    margin: 0.1em 0 0.5em;
}

.tour .slide-note {
    font-size: 0.86em;
    opacity: 0.75;
    margin: 0.5em 0 0.2em;
}

/* Node flows: bordered concept chips joined by arrows */
.tour .nodes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45em;
    align-items: center;
    justify-content: center;
    margin: 0.9em 0;
}

.tour .nd {
    display: inline-block;
    border: 1.5px solid var(--quote-border, #bbb);
    border-radius: 8px;
    padding: 0.38em 0.95em;
    font-size: 0.95em;
    white-space: nowrap;
}

/* Concept-colored nodes carry a tint fill; solidity marks the concepts the
   eye should land on. Neutral nodes stay outline. */
.tour .nd-cluster  { color: #4a90d9; border-color: #4a90d9; background: rgba(74, 144, 217, 0.10); }
.tour .nd-process  { color: #e08a3c; border-color: #e08a3c; background: rgba(224, 138, 60, 0.10); }
.tour .nd-handle   { color: #4caf7d; border-color: #4caf7d; background: rgba(76, 175, 125, 0.10); }
.tour .nd-scenario { color: #9b6dd6; border-color: #9b6dd6; background: rgba(155, 109, 214, 0.10); }

/* Enumeration rows: small quiet chips, no fill — reads as a menu, not a flow */
.tour .nodes--list {
    gap: 0.4em;
}

.tour .nodes--list .nd {
    font-size: 0.86em;
    padding: 0.16em 0.55em;
    border-width: 1px;
    background: transparent;
}

.tour .ndw {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15em;
}

.tour .nd-tag {
    color: #4caf7d;
    font-size: 0.78em;
    white-space: nowrap;
}

.tour .nd-sub {
    font-size: 0.78em;
    opacity: 0.65;
    white-space: nowrap;
}

.tour .nlabel {
    font-size: 0.78em;
    font-weight: 600;
    letter-spacing: 0.04em;
    opacity: 0.55;
    margin: 0.9em 0 -0.4em;
}

.tour .nda {
    opacity: 0.6;
    font-weight: 600;
    font-size: 1.12em;
}

.tour .nodes--list .nda {
    font-size: 1em;
    opacity: 0.5;
}

.tour .nd--dash {
    border-style: dashed;
    background: transparent;
}

/* Tile rows: bordered alternatives; border style encodes ownership */
.tour .tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.6em;
    margin: 0.9em 0;
}

.tour .tile {
    border: 1.5px solid var(--quote-border, #bbb);
    border-radius: 8px;
    padding: 0.55em 0.75em;
    text-align: center;
}

.tour .tile b {
    display: block;
    font-size: 0.95em;
}

.tour .tile > span {
    display: block;
    font-size: 0.82em;
    opacity: 0.75;
    margin-top: 0.15em;
}

.tour .tile-cluster  { border-color: #4a90d9; background: rgba(74, 144, 217, 0.08); }
.tour .tile-cluster b { color: #4a90d9; }
.tour .tile-process  { border-color: #e08a3c; background: rgba(224, 138, 60, 0.08); }
.tour .tile-process b { color: #e08a3c; }
.tour .tile-handle   { border-color: #4caf7d; background: rgba(76, 175, 125, 0.08); }
.tour .tile-handle b { color: #4caf7d; }
.tour .tile-scenario { border-color: #9b6dd6; background: rgba(155, 109, 214, 0.08); }
.tour .tile-scenario b { color: #9b6dd6; }

/* Hollow variants: the tint drains as framework ownership decreases */
.tour .tile--dash { border-style: dashed; background: transparent; }
.tour .tile--dot  { border-style: dotted; background: transparent; }

/* Section deck: each section is a slide card — small kicker heading, the
   .slide summary, and the body collapsed until clicked (height:0, same
   mermaid-width reason as .fold). */
.tour .sec-num {
    position: absolute;
    top: -0.18em;
    right: 0.3em;
    font-size: 3.8em;
    font-weight: 600;
    opacity: 0.06;
    pointer-events: none;
}

.tour .sec-head {
    display: flex;
    align-items: baseline;
    gap: 0.9em;
    padding: 0.85em 1.3em 0;
    cursor: pointer;
}

.tour .sec-head h2 {
    margin: 0;
    padding: 0;
    border: none;
    font-size: 0.82em;
    letter-spacing: 0.05em;
    opacity: 0.6;
    flex: 1;
}

.tour .sec-head .unpacks {
    display: none;
}

.tour .sec-chev {
    opacity: 0.55;
    font-weight: 600;
}

.tour .sec-head:hover .sec-chev {
    opacity: 1;
}

.tour .sec > .slide {
    padding: 0 1.3em 0.7em;
    cursor: pointer;
}

.tour .sec--closed .sec-body {
    height: 0;
    overflow: hidden;
}

.tour .sec-body {
    padding: 0 1.3em 0.9em;
}

.tour .sec:not(.sec--closed) .sec-body {
    border-top: 1px solid var(--quote-border, #d0d0d0);
    padding-top: 0.8em;
    margin: 0.3em 1.3em 0;
    padding-left: 0;
    padding-right: 0;
}

.tour .sec-controls {
    text-align: right;
    margin: 1.4em 0 0.4em;
}

.tour .sec-controls__toggle {
    background: none;
    border: none;
    color: inherit;
    opacity: 0.7;
    font-size: 0.88em;
    cursor: pointer;
    padding: 0.2em 0.4em;
}

.tour .sec-controls__toggle:hover {
    opacity: 1;
    text-decoration: underline;
}

@media print {
    .tour .sec--closed .sec-body {
        height: auto;
        overflow: visible;
    }

    .tour .sec-chev,
    .tour .sec-controls {
        display: none;
    }
}

/* Architecture map: hand-laid SVG poster; scrolls sideways when the
   column is narrower than its legibility floor. */
.tour .arch-map {
    overflow-x: auto;
    margin: 1.6em 0;
}

.tour .arch-map svg {
    display: block;
    width: 100%;
    min-width: 740px;
    height: auto;
    margin: 0 auto;
}

.tour .map-help {
    margin: -0.8em 0 1.2em;
    text-align: center;
    font-size: 0.84em;
    opacity: 0.68;
}

/* Zoomed overlay for the architecture map: click the map to open it large,
   scrolled to the clicked spot; drag pans; click or Escape closes. The zoom
   width is carried by a variable set from tour.js. */
.arch-map-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    cursor: zoom-out;
}

.arch-map-overlay__content {
    background: var(--bg, #fff);
    padding: 16px;
    max-width: 95vw;
    max-height: 95vh;
    overflow: auto;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    cursor: grab;
}

.arch-map-overlay__content svg {
    width: var(--fw-zoom-width, 1700px);
    max-width: none;
    height: auto;
    display: block;
}

.arch-map-overlay__controls {
    position: fixed;
    top: 1.25rem;
    right: 1.25rem;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.5rem 0.6rem 0.5rem 0.8rem;
    color: #fff;
    background: rgba(20, 20, 20, 0.86);
    border-radius: 8px;
    font-size: 0.84rem;
    cursor: default;
}

.arch-map-overlay__controls button {
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 5px;
    padding: 0.3rem 0.6rem;
    color: #fff;
    background: transparent;
    cursor: pointer;
}

.arch-map-overlay__controls button:hover,
.arch-map-overlay__controls button:focus-visible {
    background: rgba(255, 255, 255, 0.15);
}

/* Slightly larger code on tour slides */
.tour pre > code {
    font-size: 0.95em;
    line-height: 1.5;
}

/* Two-column fact grid */
.tour .duo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1em;
    margin: 1.2em 0;
}

.tour .duo > div {
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-radius: 12px;
    padding: 1em 1.2em;
}

.tour .duo h4 {
    margin: 0 0 0.5em 0;
    font-size: 1.05em;
}

@media (max-width: 700px) {
    .tour .duo {
        grid-template-columns: 1fr;
    }
}

/* Horizontal sequence strip: boxed items joined by arrows */
.tour .seq {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45em;
    align-items: center;
    justify-content: center;
    margin: 1.2em 0;
}

.tour .seq span {
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-radius: 8px;
    padding: 0.35em 0.8em;
    font-size: 0.95em;
    white-space: nowrap;
}

.tour .seq .arr {
    background: none;
    padding: 0;
    opacity: 0.55;
    font-weight: 600;
}

/* Tight, scannable bullet lists */
.tour ul li,
.tour ol li {
    margin: 0.25em 0;
}

/* ---- Concept color tokens ----------------------------------------------
   Four hues used consistently across chips, diagrams, and code accents:
   cluster #4a90d9 · process #e08a3c · handle #4caf7d · scenario #9b6dd6 */

.tour .tk {
    border: 1.5px solid;
    border-radius: 6px;
    padding: 0.05em 0.45em;
    font-size: 0.92em;
    white-space: nowrap;
}

.tour .tk-cluster  { color: #4a90d9; border-color: #4a90d9; }
.tour .tk-process  { color: #e08a3c; border-color: #e08a3c; }
.tour .tk-handle   { color: #4caf7d; border-color: #4caf7d; }
.tour .tk-scenario { color: #9b6dd6; border-color: #9b6dd6; }

/* "Unpacks line N" chip under a section heading */
.tour .unpacks {
    font-size: 0.85em;
    opacity: 0.8;
    margin: -0.4em 0 1em 0;
}

.tour .unpacks::before {
    content: "Unpacks ";
    font-weight: 600;
}

/* Recap strip between sections: closure + forward hook */
.tour .recap {
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-left: 4px solid #9b6dd6;
    border-radius: 0 10px 10px 0;
    padding: 0.6em 1em;
    font-size: 0.92em;
    margin: 1.6em 0 0 0;
}

/* Notes list matching ①②③ markers inside a code block */
.tour .code-notes {
    list-style: none;
    padding-left: 0;
    font-size: 0.92em;
    margin-top: 0.6em;
}

.tour .code-notes li {
    margin: 0.3em 0;
    padding-left: 2em;
    text-indent: -2em;
}

/* Collapsed depth layers */
.tour details {
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-radius: 10px;
    padding: 0.5em 1em;
    margin: 1em 0;
}

.tour details summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95em;
}

.tour details[open] summary {
    margin-bottom: 0.6em;
}

/* ---- Section progress rail (built by tour.js) -------------------------- */
.tour-rail {
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 50;
}

.tour-rail a {
    position: relative;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    line-height: 1;
    text-decoration: none !important;
    color: inherit;
    border: 1.5px solid currentColor;
    opacity: 0.35;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.tour-rail a:hover {
    opacity: 0.75;
}

.tour-rail a.on {
    background: #9b6dd6;
    border-color: #9b6dd6;
    color: #fff;
    opacity: 1;
    transform: scale(1.15);
}

.tour-rail a::after {
    content: attr(data-label);
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    font-size: 0.78rem;
    background: var(--bg, #fff);
    border: 1px solid var(--quote-border, #ccc);
    border-radius: 6px;
    padding: 0.15em 0.6em;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.tour-rail a:hover::after,
.tour-rail a:focus-visible::after {
    opacity: 1;
}

@media (max-width: 1150px) {
    .tour-rail {
        display: none;
    }
}

/* ---- Reveal-on-scroll (tour.js; disabled under reduced motion) --------- */
.tour .reveal {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.tour .reveal.on {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .tour .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Compact label:value fact rows */
.tour .facts {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 0.35em 1em;
    margin: 1em 0;
}

.tour .facts b {
    white-space: nowrap;
}

/* One-sentence relation of the glossary terms; neutral chips match .tk */
.tour .spine {
    font-size: 1.14em;
    line-height: 2.1;
    text-align: center;
    margin: 1.3em 0;
}

.tour .spine b {
    border: 1.5px solid var(--quote-border, #ccc);
    border-radius: 6px;
    padding: 0.05em 0.45em;
    font-size: 0.92em;
    white-space: nowrap;
}

/* Glossary term cards: three pairs, icon + term + short gloss per row */
.tour .gcards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8em;
    margin: 1.2em 0;
}

.tour .gcard {
    background: var(--quote-bg, rgba(128, 128, 128, 0.08));
    border-radius: 10px;
    padding: 0.9em 1.1em 1em;
}

.tour .gcard .gcard-label {
    display: block;
    font-size: 0.8em;
    letter-spacing: 0.04em;
    opacity: 0.6;
    margin-bottom: 0.75em;
}

.tour .gcard .gterm {
    display: flex;
    gap: 0.6em;
    align-items: flex-start;
    margin-top: 0.6em;
}

.tour .gcard .gterm svg {
    width: 21px;
    height: 21px;
    flex: none;
    margin-top: 0.1em;
    opacity: 0.75;
}

.tour .gcard .gterm b {
    display: block;
    line-height: 1.35;
}

.tour .gcard .gterm .tk {
    display: inline-block;
    margin-bottom: 0.15em;
}

.tour .gcard .gterm .ggloss {
    display: block;
    font-size: 0.9em;
    opacity: 0.72;
    line-height: 1.4;
}

@media (max-width: 640px) {
    .tour .gcards {
        grid-template-columns: 1fr;
    }
}

/* Glossary grid: term | short gloss | full definition, rows grouped in pairs */
.tour .gloss {
    display: grid;
    grid-template-columns: max-content max-content 1fr;
    gap: 0.45em 1.2em;
    align-items: baseline;
    margin: 1em 0;
}

.tour .gloss .g-term {
    font-weight: 600;
    white-space: nowrap;
}

.tour .gloss .g-gloss {
    font-weight: 600;
    white-space: nowrap;
}

.tour .gloss .g-def {
    opacity: 0.72;
    font-size: 0.92em;
}

.tour .gloss .brk {
    grid-column: 1 / -1;
    height: 0;
    border-top: 1px solid var(--quote-border, #d0d0d0);
    opacity: 0.45;
}

@media (max-width: 640px) {
    .tour .gloss {
        grid-template-columns: max-content 1fr;
    }

    .tour .gloss .g-gloss {
        white-space: normal;
    }

    .tour .gloss .g-def {
        grid-column: 2;
        margin-top: -0.35em;
    }
}