/* ============================================================
   Syns — investor explainer deck
   Shared design system (clean minimal, VC-pitch)
   ============================================================ */

:root {
  --bg:          #FBFBFA;
  --surface:     #FFFFFF;
  --ink:         #1A1A1A;
  --ink-soft:    #4B4B4B;
  --muted:       #8A8A8A;
  --line:        #E6E6E3;
  --accent:      #4F46E5;
  --accent-soft: #EEF0FE;
  --good:        #0E9F6E;
  --good-soft:   #E7F6EF;
  --warn:        #B45309;
  --warn-soft:   #FBF0E4;

  --term-bg:     #161616;
  --term-ink:    #E9E9E7;

  --radius:      16px;
  --radius-sm:   10px;
  --shadow:      0 1px 2px rgba(0,0,0,.04);
  --shadow-card: 0 1px 3px rgba(0,0,0,.05), 0 8px 24px rgba(0,0,0,.03);

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;

  --maxw: 1040px;
  --measure: 68ch;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 19px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- progress bar (top) ---- */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--accent);
  z-index: 50;
  transition: width .3s ease;
}

/* ---- slide frame ---- */
.slide {
  min-height: 100vh;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px 40px 96px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  animation: rise .28s ease both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- typography ---- */
.eyebrow {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}
h1.title {
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 22px;
  max-width: 20ch;
}
.lede {
  font-size: clamp(18px, 2vw, 21px);
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0 0 8px;
}
.caption { font-size: 14px; color: var(--muted); }
.strong-accent { color: var(--accent); font-weight: 600; }
.nowrap { white-space: nowrap; }
p { max-width: var(--measure); }

/* ---- layout helpers ---- */
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-6 { grid-template-columns: repeat(3, 1fr); }
.row { display: flex; gap: 18px; flex-wrap: wrap; }
.mt-s { margin-top: 14px; }
.mt-m { margin-top: 26px; }
.mt-l { margin-top: 40px; }
.center { text-align: center; }

/* ---- cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.01em; }
.card .kicker {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.card p { margin: 6px 0 0; font-size: 15.5px; color: var(--ink-soft); }
.card.hi { border-color: var(--accent); background: var(--accent-soft); }
.card.warn { border-color: #EAD9C4; background: var(--warn-soft); }
.card.good { border-color: #CDEBDD; background: var(--good-soft); }

/* ---- key figure ---- */
.figure {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  line-height: 1;
}

/* ---- lists ---- */
ul.clean { list-style: none; padding: 0; margin: 14px 0 0; max-width: var(--measure); }
ul.clean li {
  padding: 10px 0 10px 26px;
  position: relative;
  border-bottom: 1px solid var(--line);
  font-size: 16.5px;
  color: var(--ink-soft);
}
ul.clean li:last-child { border-bottom: none; }
ul.clean li::before {
  content: "";
  position: absolute; left: 4px; top: 18px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
ul.clean li b, ul.clean li strong { color: var(--ink); font-weight: 600; }

/* ---- comparison table ---- */
table.cmp {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 15.5px;
}
table.cmp th, table.cmp td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.cmp thead th {
  font-size: 12px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--muted); font-weight: 600;
}
table.cmp thead th.syns { color: var(--accent); }
table.cmp td.vs { font-weight: 600; color: var(--ink); width: 26%; }
table.cmp tr:last-child td { border-bottom: none; }

/* ---- terminal block ---- */
.term {
  background: var(--term-bg);
  color: var(--term-ink);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.7;
  overflow-x: auto;
}
.term .tprompt { color: #7C7CF0; }
.term .tcomment { color: #7C7C7C; }
.term .tok { color: #59C29B; }
.term .twin { color: #E9E9E7; }

/* ---- diagrams ---- */
.diagram { margin-top: 26px; }
svg.diagram-svg { width: 100%; height: auto; display: block; }
.node-box { fill: var(--surface); stroke: var(--line); stroke-width: 1.5; }
.node-box.accent { stroke: var(--accent); }
.node-label { font-family: var(--sans); font-weight: 600; fill: var(--ink); }
.node-sub  { font-family: var(--mono); fill: var(--muted); }
.edge { stroke: #C9C9C6; stroke-width: 1.6; fill: none; }
.edge.accent { stroke: var(--accent); stroke-width: 2; }
.edge-label { font-family: var(--sans); font-size: 12px; fill: var(--ink-soft); }
.edge-label.accent { fill: var(--accent); font-weight: 600; }

/* ---- tiles (bounded contexts / positioning) ---- */
.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.tile.hub { border-color: var(--accent); background: var(--accent-soft); }
.tile .t-name { font-family: var(--mono); font-size: 13px; color: var(--accent); font-weight: 600; }
.tile p { margin: 6px 0 0; font-size: 14px; color: var(--ink-soft); max-width: none; }

/* ---- ladder / staircase ---- */
.ladder { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.rung {
  display: flex; align-items: baseline; gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
}
.rung .n { font-family: var(--mono); color: var(--muted); font-size: 13px; width: 20px; }
.rung .name { font-weight: 700; width: 150px; letter-spacing: -0.01em; }
.rung .val { color: var(--ink-soft); font-size: 15.5px; }
.rung.start { border-color: var(--accent); background: var(--accent-soft); }

/* ---- milestone track ---- */
.track { display: flex; flex-direction: column; gap: 8px; margin-top: 18px; }
.ms { display: flex; align-items: center; gap: 14px; padding: 10px 4px; border-bottom: 1px solid var(--line); }
.ms:last-child { border-bottom: none; }
.ms .dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
.ms .dot.done { background: var(--accent); }
.ms .dot.plan { background: #C9C9F2; }
.ms .dot.future { background: var(--line); border: 1px solid #D5D5D2; }
.ms .m-name { font-weight: 600; min-width: 210px; }
.ms .m-scope { color: var(--ink-soft); font-size: 15px; flex: 1; }
.ms .m-status { font-family: var(--mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }

/* ---- path progression ---- */
.path { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 8px; }
.path .step {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; padding: 8px 15px; font-size: 14.5px; font-weight: 500;
}
.path .arrow { color: var(--muted); }
.path .step.now { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---- footer nav ---- */
.nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: rgba(251,251,250,.82);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
  font-size: 14px;
  z-index: 40;
}
.nav a { color: var(--ink-soft); text-decoration: none; font-weight: 500; padding: 6px 10px; border-radius: 8px; }
.nav a:hover { background: var(--accent-soft); color: var(--accent); }
.nav a.disabled { color: var(--line); pointer-events: none; }
.nav .counter { color: var(--muted); font-family: var(--mono); font-size: 13px; }
.nav .counter a { color: var(--muted); padding: 0; }
.nav .counter a:hover { background: none; color: var(--accent); }

/* ---- index / TOC ---- */
.toc { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 4px 40px; }
.toc a {
  display: flex; gap: 14px; align-items: baseline;
  padding: 11px 8px; border-bottom: 1px solid var(--line);
  text-decoration: none; color: var(--ink);
}
.toc a:hover { background: var(--accent-soft); }
.toc .tn { font-family: var(--mono); font-size: 13px; color: var(--accent); width: 24px; flex: none; }
.toc .tt { font-weight: 600; }
.toc .td { color: var(--muted); font-size: 14px; margin-left: auto; text-align: right; }

/* ---- misc ---- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: center; }
.brandmark { display: flex; align-items: center; gap: 12px; }
.wordmark { font-size: 40px; font-weight: 800; letter-spacing: -0.03em; }
.wordmark .dot { color: var(--accent); }
.meta-line { color: var(--muted); font-size: 14px; margin-top: 8px; }
hr.rule { border: none; border-top: 1px solid var(--line); margin: 22px 0; }
.pill { display:inline-block; font-family: var(--mono); font-size: 11px; letter-spacing:.04em; text-transform:uppercase; color: var(--accent); background: var(--accent-soft); padding: 3px 9px; border-radius: 999px; }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-6, .split, .toc { grid-template-columns: 1fr; }
  h1.title { font-size: 30px; }
  .slide { padding: 56px 22px 96px; }
  .rung { flex-direction: column; gap: 4px; }
  .rung .name { width: auto; }
  .ms .m-name { min-width: 0; }
}

/* ---- print (export to PDF) ---- */
@media print {
  :root { --bg: #fff; }
  .nav, .progress { display: none !important; }
  .slide { min-height: 0; page-break-after: always; padding: 28px 24px; justify-content: flex-start; animation: none; }
  body { font-size: 12pt; }
  .card, .tile, .rung, .term { box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
  .slide { animation: none; }
  .progress { transition: none; }
}