/* ==========================================================================
   CYOA Maker With AI — Report theme
   White-on-blue. Inter font (matches docs/proposal/proposal.html).
   Shared by hand-written pages and pandoc-built appendices.
   ========================================================================== */

:root {
  --blue:       #1d5a8a;   /* header bar */
  --blue-dark:  #14405f;
  --accent:     #2f8f99;   /* teal link accent (from logo) */
  --accent-dk:  #216a72;
  --ink:        #1a1a2e;   /* body text */
  --heading:    #14405f;   /* headings */
  --muted:      #5a5a66;
  --bg:         #fafaf8;
  --panel:      #eef3f7;   /* light blue panel */
  --border:     #d8dee4;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
}

/* ---- Header bar (injected by header.js) ---------------------------------- */

#report-header { min-height: 104px; }   /* reserve space, avoid layout flash */

.report-header {
  background: var(--blue);
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  color: #fff;
  border-bottom: 4px solid var(--accent);
}

.report-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 20px 6px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.report-header__logo {
  width: 98px;
  height: 98px;
  flex: 0 0 auto;
  border-radius: 12px;
  background: #fff;
  padding: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.report-header__text { display: flex; flex-direction: column; line-height: 1.3; }

.report-header__title {
  font-size: 1.9em;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.15;
  color: #fff;
}

.report-header__sub {
  font-size: 0.90em;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.65);
}

.report-header__sub--name {
  font-weight: 400;
  color: rgba(255, 255, 255, 0.95);
}

/* The header is a clickable link back to the index */
a.report-header__home { text-decoration: none; display: block; }
a.report-header__home:hover .report-header__title { text-decoration: underline; }

/* ---- Page body ----------------------------------------------------------- */

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 50px 40px 80px;
}

h1, h2, h3, h4 { color: var(--heading); line-height: 1.25; }

h1 {
  font-size: 2.3em;
  letter-spacing: -0.5px;
  margin-bottom: 0.4rem;
}

.lead {
  font-size: 1.12em;
  color: var(--muted);
  margin-bottom: 2rem;
}

/* "back to report index" link at the top of a page */
.toplink { margin-bottom: 16px; font-weight: 500; }

h2 {
  font-size: 1.6em;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 8px;
  margin: 40px 0 18px;
}

h3 { font-size: 1.22em; margin: 28px 0 10px; }
h4 { font-size: 1.05em; margin: 20px 0 8px; }

p  { margin-bottom: 14px; }
ul, ol { margin: 0 0 16px 26px; }
li { margin-bottom: 6px; }

a { color: #2a7ec4; text-decoration: underline; }
a:hover { color: var(--blue); }

strong { color: var(--heading); }

hr { border: none; border-top: 2px solid var(--border); margin: 2rem 0; }

/* ---- Cards / nav / panels ------------------------------------------------ */

.toc-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.toc-card {
  display: block;
  position: relative;          /* anchor for the stretched card link */
  background: #fff;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 16px 18px;
  text-decoration: none;
  transition: box-shadow 0.15s, transform 0.15s;
}

/* A card whose body holds its own link(s): the primary link is "stretched" to
   cover the whole card, while any link inside .desc sits above it and stays
   independently clickable. */
.toc-card .card-link { text-decoration: none; }
.toc-card .card-link::after { content: ""; position: absolute; inset: 0; z-index: 0; }
.toc-card .desc a {
  position: relative;
  z-index: 1;
  color: var(--accent-dk);
  text-decoration: underline;
}

.toc-card:hover {
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(20, 64, 95, 0.12);
  transform: translateY(-2px);
}

.toc-card .num {
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-dk);
  font-weight: 600;
}

.toc-card .name { display: block; font-weight: 600; color: var(--heading); margin-top: 2px; }
.toc-card .desc { display: block; font-size: 0.9em; color: var(--muted); margin-top: 4px; }

.panel {
  background: var(--panel);
  border-left: 4px solid var(--blue);
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 22px 0;
}

.panel h3 { margin-top: 0; }

/* ---- Table of contents -----------------------------------------------------
   One shared look across the walkthrough (.localtoc) and the pandoc-built
   appendices (nav#TOC). Mirrors the TOC card on summary/index.html. */
.localtoc,
nav#TOC,
nav.toc {
  background: #f0f0ea;
  border-left: 4px solid #2c3e50;
  border-radius: 0 4px 4px 0;
  padding: 28px 32px;
  margin: 0 0 44px;
  scroll-margin-top: 40px;   /* land a little above the TOC when jumped to */
}

/* heading: the walkthrough supplies a <strong>; pandoc TOCs get a generated one */
.localtoc strong,
nav#TOC::before {
  display: block;
  font-size: 1.1em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #2c3e50;
  margin: 0 0 16px;
}
nav#TOC::before { content: "Contents"; }

/* lists: bold the top level, slightly smaller + lighter nested entries */
.localtoc ul,
nav#TOC ul, nav.toc ul { list-style: none; margin: 0 0 0 20px; padding: 0; }
.localtoc > ul,
nav#TOC > ul, nav.toc > ul { margin-left: 0; }
.localtoc ul ul,
nav#TOC ul ul, nav.toc ul ul { margin: 2px 0 6px 22px; }
.localtoc li,
nav#TOC li, nav.toc li { margin: 3px 0; }
.localtoc > ul > li,
nav#TOC > ul > li, nav.toc > ul > li { font-weight: 600; }
.localtoc ul ul li,
nav#TOC ul ul li, nav.toc ul ul li { font-weight: 400; font-size: 0.94em; }

.localtoc a,
nav#TOC a, nav.toc a { color: #2c3e50; text-decoration: none; }
.localtoc a:hover,
nav#TOC a:hover, nav.toc a:hover { text-decoration: underline; }

/* ---- Figures & images ---------------------------------------------------- */

img { max-width: 100%; height: auto; }

figure { margin: 26px 0; text-align: center; }

figure img {
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 3px 12px rgba(20, 64, 95, 0.12);
  cursor: zoom-in;
}

figcaption {
  font-size: 0.92em;
  color: var(--muted);
  margin-top: 10px;
  font-style: italic;
}

/* diagrams (svg) shouldn't get the heavy photo border */
figure.diagram img { box-shadow: none; border: none; background: #fff; padding: 8px; }

/* a text column that can contain a floated figure (clearfix) */
.textcol::after { content: ""; display: block; clear: both; }

/* a figure that floats to the right with text wrapping around it */
figure.figure-right {
  float: right;
  width: 300px;
  max-width: 42%;
  margin: 6px 0 18px 28px;
}
figure.figure-right figcaption { text-align: center; }

@media (max-width: 600px) {
  figure.figure-right { float: none; width: auto; max-width: 100%; margin: 22px 0; }
}

video {
  width: 100%;
  max-width: 100%;
  border-radius: 8px;
  box-shadow: 0 3px 12px rgba(20, 64, 95, 0.18);
  background: #000;
}

/* Prominent centre play button overlaid on a video (added by lightbox.js) */
.video-wrap { position: relative; line-height: 0; }
.video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 88px;
  height: 88px;
  border: 3px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  background: rgba(236, 54, 22, 0.88);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.2s ease;
}
.video-play::before {              /* the play triangle */
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 17px 0 17px 30px;
  border-color: transparent transparent transparent #fff;
  margin-left: 7px;                /* optical centring */
}
.video-play:hover { background: var(--blue); transform: translate(-50%, -50%) scale(1.08); }
.video-wrap.playing .video-play { opacity: 0; pointer-events: none; }

/* ---- Tables -------------------------------------------------------------- */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 18px 0;
  font-size: 0.95em;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

th { background: var(--panel); color: var(--heading); font-weight: 600; }
tr:nth-child(even) td { background: #fbfcfd; }

/* ---- Code (appendices) --------------------------------------------------- */

code, pre {
  font-family: ui-monospace, "Cascadia Code", Consolas, "Courier New", monospace;
  font-size: 0.9em;
}

code { background: var(--panel); padding: 1px 5px; border-radius: 4px; }

pre {
  background: #1b2733;
  color: #e6edf3;
  padding: 16px 18px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
}

pre code { background: none; padding: 0; color: inherit; }

blockquote {
  border-left: 4px solid var(--accent);
  background: var(--panel);
  padding: 12px 18px;
  margin: 18px 0;
  border-radius: 0 6px 6px 0;
  color: var(--muted);
}

/* ---- Back link ----------------------------------------------------------- */

.back-link {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-weight: 500;
}

/* ---- Responsive ---------------------------------------------------------- */

@media (max-width: 600px) {
  .report-header__inner { padding: 14px 20px; gap: 14px; }
  .report-header__logo { width: 52px; height: 52px; }
  .report-header__title { font-size: 1.45em; }
  .page { padding: 32px 22px 60px; }
}