/* ============================================================
   Buscemi Centrality · PechaKucha deck
   Theme: Macintosh System 7 (1991). Monochrome chrome, colour
   reserved for graph semantics, like a colour icon on a grey desktop.
   Change the tokens below and the whole deck follows.
   ============================================================ */
:root {
  --bg:   #FFFFFF;   /* window content */
  --ink:  #000000;   /* text */
  --pink: #D6336C;   /* the source node */
  --gold: #A87900;   /* coappearance / secondary accent */
  --teal: #1F756D;   /* coauthorship / quality accent */
  --grey: #444444;   /* muted text */
  --dim:  #808080;   /* faint text, weak edges */
  --card: #FFFFFF;   /* panel fill */
  --edge: #BBBBBB;   /* faint constellation edges */

  /* Chicago and Geneva if you have them (Macs mostly do, in spirit);
     honest fallbacks otherwise. Monaco for anything typewritten. */
  --chicago: "Chicago", "Charcoal", "Geneva", "Lucida Grande", Helvetica, Arial, sans-serif;
  --geneva:  "Geneva", "Lucida Grande", Verdana, Helvetica, sans-serif;
  --monaco:  "Monaco", "Courier New", monospace;

  /* legacy aliases so existing markup keeps working */
  --serif: var(--chicago);
  --sans:  var(--geneva);
  --math:  var(--monaco);

  --slide-w: 1280px;
  --slide-h: 720px;
}

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

/* the desktop: 50% dither grey, as nature intended */
html, body {
  height: 100%;
  background-color: #7F7F7F;
  background-image:
    linear-gradient(45deg, #6E6E6E 25%, transparent 25%, transparent 75%, #6E6E6E 75%),
    linear-gradient(45deg, #6E6E6E 25%, transparent 25%, transparent 75%, #6E6E6E 75%);
  background-position: 0 0, 2px 2px;
  background-size: 4px 4px;
  color: var(--ink);
  font-family: var(--geneva);
  overflow: hidden;
}

::selection { background: #000; color: #fff; }

/* ---------- viewport + the window ---------- */
#viewport {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding-bottom: 46px; /* room for the controls under the window */
}

#macwindow {
  transform-origin: center center; /* scaled by deck.js */
  background: var(--bg);
  border: 1px solid #000;
  box-shadow: 2px 2px 0 #000;
}

/* title bar: pinstripes, centred title, close box left, zoom box right */
#titlebar {
  height: 28px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  background: var(--bg);
  border-bottom: 1px solid #000;
  user-select: none;
}
#titlebar .stripe {
  flex: 1;
  height: 13px;
  background: repeating-linear-gradient(to bottom, #000 0 1px, transparent 1px 3px);
}
#titlebar .titletext {
  font-family: var(--chicago);
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}
#titlebar .closebox,
#titlebar .zoombox {
  width: 14px; height: 14px;
  border: 1px solid #000;
  background: var(--bg);
  flex-shrink: 0;
  position: relative;
}
#titlebar .zoombox::after {
  content: "";
  position: absolute;
  left: 1px; top: 1px;
  width: 7px; height: 7px;
  border: 1px solid #000;
}

#stage {
  width: var(--slide-w);
  height: var(--slide-h);
  position: relative;
  background: var(--bg);
}

/* ---------- slides ---------- */
.slide {
  position: absolute;
  inset: 0;
  padding: 52px 67px;
  display: none;
}
.slide.current { display: block; }
/* System 7 does not animate. */

/* ---------- typography ---------- */
.kicker {
  font-family: var(--chicago);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 14px;
}
.kicker::before { content: "\25C6\00a0\00a0"; font-size: 9px; vertical-align: 2px; } /* small diamond, like a menu marker */

h1 {
  font-family: var(--chicago);
  font-weight: 700;
  font-size: 40px;
  line-height: 1.08;
  margin-bottom: 26px;
}

.huge {
  font-family: var(--chicago);
  font-weight: 700;
  font-size: 72px;
  line-height: 1.0;
}

.statement {
  font-family: var(--chicago);
  font-weight: 700;
  font-size: 42px;
  line-height: 1.15;
  max-width: 1080px;
}

.lede   { font-size: 19px; color: var(--grey); max-width: 1000px; line-height: 1.45; }
.muted  { color: var(--grey); }
.faint  { color: var(--dim); }
.pink   { color: var(--pink); }
.gold   { color: var(--gold); }
.teal   { color: var(--teal); }
.it     { font-style: italic; }

.math {
  font-family: var(--monaco);
  font-style: normal; /* Monaco does not do italics, and neither did 1991 */
}

.footline {
  position: absolute;
  left: 67px;
  bottom: 34px;
  right: 67px;
  font-size: 14px;
  color: var(--grey);
}

/* ---------- reusable layout bits ---------- */
.cards { display: flex; gap: 38px; margin-top: 10px; }

.card {
  background: var(--card);
  border: 1px solid #000;
  box-shadow: 2px 2px 0 #000;
  padding: 30px 34px;
  flex: 1;
}
.card .num   { font-family: var(--monaco); font-size: 26px; color: var(--pink); margin-bottom: 12px; }
.card h3     { font-family: var(--chicago); font-size: 22px; margin-bottom: 12px; }
.card p      { font-size: 15px; color: var(--grey); line-height: 1.45; }
.card .bigmath { font-family: var(--monaco); font-size: 28px; margin-bottom: 14px; }

/* dialogue-box treatment for the big formulas */
.formula-box {
  background: var(--card);
  border: 2px solid #000;
  outline: 1px solid #000;
  outline-offset: -6px;
  padding: 40px 30px;
  text-align: center;
  font-family: var(--monaco);
  font-size: 30px;
  margin: 6px auto 34px;
  max-width: 900px;
}

.deflist { margin-top: 8px; }
.deflist .row { display: flex; align-items: baseline; margin-bottom: 20px; }
.deflist .term { font-family: var(--monaco); font-size: 20px; color: var(--pink); width: 220px; flex-shrink: 0; }
.deflist .def  { font-size: 17px; color: var(--grey); }

.steps { margin-top: 6px; }
.steps .step { display: flex; align-items: baseline; gap: 22px; margin-bottom: 28px; }
.steps .dot {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1.5px solid #000; color: var(--ink);
  background: var(--card);
  font-family: var(--chicago);
  font-size: 14px; font-weight: 700;
  display: grid; place-items: center;
  flex-shrink: 0; position: relative; top: 6px;
}
.steps .lhs { font-family: var(--monaco); font-size: 19px; width: 480px; flex-shrink: 0; }
.steps .rhs { font-size: 16px; color: var(--grey); }

.stats { display: flex; gap: 60px; margin-top: 34px; }
.stat .value { font-family: var(--chicago); font-weight: 700; font-size: 52px; color: var(--pink); }
.stat .value.losing { color: var(--dim); }
.stat .label { font-family: var(--monaco); font-size: 15px; color: var(--grey); margin-top: 6px; }

/* limitations */
.lims { margin-top: 10px; }
.lims .lim { display: flex; gap: 24px; align-items: baseline; margin-bottom: 34px; }
.lims .pilcrow { font-family: var(--chicago); font-size: 28px; color: var(--pink); }
.lims p { font-size: 21px; line-height: 1.35; }

/* table: a Finder list view, more or less */
table { border-collapse: collapse; width: 100%; margin-top: 6px; border: 1px solid #000; }
th, td { padding: 10px 16px; font-size: 15px; border: 1px solid #999; text-align: left; }
th {
  color: var(--ink);
  background: #DDD;
  font-weight: 700;
  border-bottom: 2px solid #000;
}
tbody tr:nth-child(odd) { background: #F4F4F4; }
td.n { font-family: var(--monaco); }
tr.source td { color: var(--pink); }
tr.source td:first-child { font-weight: 700; }
tr.outlier td { color: var(--dim); font-style: italic; }

/* links list on the fin slide */
.linklist { margin-top: 30px; }
.linklist .row { display: flex; margin-bottom: 18px; font-size: 16px; }
.linklist .k { color: var(--ink); font-weight: 700; width: 160px; flex-shrink: 0; font-family: var(--chicago); }
.linklist .v a { color: var(--grey); text-decoration: underline; }
.linklist .v a:hover { background: #000; color: #fff; text-decoration: none; }

/* SVG diagrams: white nodes, black outlines, colour only where it means something */
svg text { font-family: var(--geneva); }
.sv-node        { fill: #FFF; stroke: #000; stroke-width: 2; }
.sv-node-faint  { fill: #FFF; stroke: #AAA; stroke-width: 2; }
.sv-node-source { fill: var(--pink); stroke: #000; stroke-width: 2; }
.sv-node-gold   { fill: var(--gold); stroke: #000; stroke-width: 2; }
.sv-edge        { stroke: #000; stroke-width: 1.5; }
.sv-edge-faint  { stroke: var(--edge); stroke-width: 1.5; }
.sv-edge-teal   { stroke: var(--teal); stroke-width: 3; }
.sv-edge-gold   { stroke: var(--gold); stroke-width: 3; }
.sv-edge-dash   { stroke-dasharray: 7 7; }
.sv-label       { fill: var(--grey); font-size: 14px; }
.sv-label-sm    { fill: var(--grey); font-size: 12px; }
.sv-ring        { fill: none; stroke: var(--pink); stroke-width: 1.5; stroke-dasharray: 8 8; }

/* ============================================================
   Chrome: controls, notes, help
   ============================================================ */
#hud {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 18px;
  font-size: 13px;
  color: #000;
  z-index: 30;
  user-select: none;
  font-family: var(--geneva);
}
#hud .spacer { flex: 1; }
#hud #counter, #hud #clock {
  background: #FFF;
  border: 1px solid #000;
  padding: 3px 10px;
  font-family: var(--monaco);
  font-size: 12px;
}
#hud button {
  background: #FFF;
  border: 1px solid #000;
  /* border-radius: 12px; */
  color: #000;
  font-family: var(--chicago);
  font-size: 13px;
  padding: 4px 16px;
  cursor: pointer;
  box-shadow: 1px 1px 0 #000;
}
#hud button:active { background: #000; color: #FFF; }
#hud button:focus-visible { outline: 2px dotted #000; outline-offset: 2px; }
#hud button.active { box-shadow: 0 0 0 2px #FFF, 0 0 0 3.5px #000; }
#clock.overtime { color: var(--pink); border-color: var(--pink); }

/* confetti for the final slide: sits over the content, under the countdown */
#confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

/* PechaKucha countdown: big, top-right of the slide, impossible to miss */
#countdown {
  display: none;
  position: absolute;
  top: 18px;
  right: 22px;
  z-index: 10;
  background: #FFF;
  border: 2px solid #000;
  box-shadow: 2px 2px 0 #000;
  padding: 8px 18px;
  font-family: var(--monaco);
  font-size: 10px;
  line-height: 1;
  min-width: 80px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
#countdown.running { display: block; }
#countdown.ending {
  color: #FFF;
  background: var(--pink);
  border-color: #000;
}

/* help overlay: a modal dialogue box */
#help {
  position: fixed; inset: 0;
  background: rgba(127, 127, 127, 0.5);
  display: none;
  place-items: center;
  z-index: 50;
}
#help.open { display: grid; }
#help .panel {
  background: #FFF;
  border: 2px solid #000;
  outline: 1px solid #000;
  outline-offset: -6px;
  box-shadow: 2px 2px 0 #000;
  padding: 36px 44px;
  min-width: 460px;
}
#help h2 { font-family: var(--chicago); font-size: 24px; margin-bottom: 20px; }
#help dl { display: grid; grid-template-columns: auto 1fr; gap: 10px 24px; font-size: 15px; }
#help dt { color: #000; font-weight: 700; font-family: var(--monaco); }
#help dd { color: var(--grey); }

kbd {
  font-family: var(--monaco);
  background: #FFF;
  border: 1px solid #000;
  /* border-radius: 3px; */
  box-shadow: 1px 1px 0 #000;
  padding: 1px 7px;
  font-size: 13px;
}