/* Deliberately single-theme: warm and light, always -- not a light/dark
   pair. Background and every color are painted explicitly here so the
   page holds its look regardless of the viewer's OS or app theme. */
:root {
  color-scheme: light;
  --ground:      #FCF6F3;
  --ground-2:    #F6E7E1;
  --surface:     #FFFFFF;
  --surface-2:   #FDF8F5;
  --ink:         #2B1D1F;
  --ink-soft:    #7A6165;
  --ink-mute:    #A68A8E;
  --border:      rgba(43,29,31,0.10);
  --border-2:    rgba(43,29,31,0.17);
  --accent:      #8B2560;
  --accent-soft: #F6E1EC;
  --good:        #0B8F2F;
  --good-soft:   #E4F5E6;
  --warn:        #A8720A;
  --warn-soft:   #FBF0DA;
  --crit:        #C23A34;
  --crit-soft:   #FBE7E5;
  --shadow: 0 1px 2px rgba(43,29,31,0.05), 0 8px 24px -12px rgba(43,29,31,0.13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.mono { font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace; }
.tab-nums { font-variant-numeric: tabular-nums; }

h1, h2, h3 { text-wrap: balance; margin: 0; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent);
}

a { color: inherit; }

/* ---------- top progress rail ---------- */
.railwrap {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: var(--border); z-index: 100;
}
.rail { height: 100%; width: 0%; background: var(--accent); transition: width 0.1s linear; }

nav.dots {
  position: fixed; right: 22px; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 14px; z-index: 90;
}
nav.dots a {
  width: 8px; height: 8px; border-radius: 50%; background: var(--border-2);
  display: block; transition: background 0.2s, transform 0.2s;
}
nav.dots a.active { background: var(--accent); transform: scale(1.4); }
@media (max-width: 900px) { nav.dots { display: none; } }

section { padding: 100px 24px; position: relative; }
.wrap { max-width: 1120px; margin: 0 auto; }
.narrow { max-width: 760px; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .rail, .barrow .fill, .split-bar > div, .stack-bar > div, nav.dots a {
    transition: none !important;
  }
  .kicker .pulse::after { animation: none !important; opacity: 0; }
}

/* ---------- hero ---------- */
.hero {
  min-height: 92vh; display: flex; flex-direction: column; justify-content: center;
  padding-top: 60px;
  background:
    radial-gradient(1100px 520px at 82% -8%, var(--accent-soft), transparent 60%),
    var(--ground);
  border-bottom: 1px solid var(--border);
}
.hero .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft);
  border: 1px solid var(--border-2); border-radius: 100px; padding: 6px 14px;
  margin-bottom: 28px; width: fit-content; background: var(--surface);
}
.kicker .pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--good); position: relative; }
.kicker .pulse::after {
  content: ""; position: absolute; inset: -4px; border-radius: 50%;
  border: 1.5px solid var(--good); animation: pulse 2.2s ease-out infinite;
}
@keyframes pulse { 0% { transform: scale(0.6); opacity: 0.9; } 100% { transform: scale(2.2); opacity: 0; } }

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.6rem);
  line-height: 1.03;
  max-width: 15ch;
}
.hero h1 em {
  font-style: normal; color: var(--accent);
}
.hero .sub {
  margin-top: 22px; font-size: clamp(1.05rem, 1.6vw, 1.28rem); color: var(--ink-soft);
  max-width: 56ch; line-height: 1.55;
}
.thesis {
  margin-top: 34px; font-family: "IBM Plex Mono", monospace; font-size: 0.98rem;
  color: var(--ink); background: var(--surface); border: 1px solid var(--border-2);
  border-left: 3px solid var(--accent); border-radius: 8px; padding: 14px 18px;
  width: fit-content; box-shadow: var(--shadow);
}
.thesis b { color: var(--accent); }

.stat-row {
  margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
@media (max-width: 760px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
.stat-cell { background: var(--surface); padding: 22px 20px; }
.stat-cell .n {
  font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  color: var(--ink); display: block;
}
.stat-cell .l { font-size: 0.82rem; color: var(--ink-soft); margin-top: 4px; display: block; }

/* Money strip: deliberately NOT .stat-cell -- that class is wired to
   script.js's count-up IntersectionObserver via a required [data-count]
   child; these are static rupee figures (same convention section 07's
   .cash-hero already uses), so a separate class avoids the observer
   calling countUp(null) on a cell with no [data-count] element. */
.money-row {
  margin-top: 14px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
@media (max-width: 760px) { .money-row { grid-template-columns: 1fr; } }
.money-cell { background: var(--surface); padding: 18px 20px; min-width: 0; }
.money-cell .n {
  font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: clamp(1.15rem, 2vw, 1.5rem);
  color: var(--ink); display: block;
}
.money-cell.good .n { color: var(--good); }
.money-cell.warn .n { color: var(--warn); }
.money-cell .l { font-size: 0.78rem; color: var(--ink-soft); margin-top: 4px; display: block; }

/* ---------- section chrome ---------- */
.sec-head { max-width: 640px; margin-bottom: 52px; }
.sec-head h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); margin-top: 10px; }
.sec-head .desc { margin-top: 14px; color: var(--ink-soft); font-size: 1.04rem; line-height: 1.6; }
.idx { color: var(--ink-mute); }

/* ---------- cards / panels ---------- */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; box-shadow: var(--shadow);
}
.grid-2 { display: grid; grid-template-columns: 1.1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 860px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
/* a bare 1fr track is really minmax(auto,1fr) -- a wide child's min-content
   can force the track past the container. min-width:0 on every grid/flex
   item in this file prevents that overflow class of bug everywhere. */
.grid-2 > *, .grid-3 > *, .stat-row > *, .value-grid > *, .versus > *, .cond, .barrow, .flow-step { min-width: 0; }

.panel h3 { font-size: 1.02rem; }
.panel .hint { font-size: 0.86rem; color: var(--ink-soft); margin-top: 6px; line-height: 1.5; }

/* ---------- flowchart (big-picture data flow) ---------- */
.flowchart-panel { min-width: 0; }
.flowchart-scroll { overflow-x: auto; min-width: 0; }
.flowchart { display: block; width: 100%; min-width: 720px; height: auto; }

/* ---------- architecture flow ---------- */
.flow { display: flex; flex-direction: column; gap: 0; }
.flow-step {
  display: grid; grid-template-columns: 64px minmax(0,1fr); gap: 20px;
  padding: 22px 0; border-bottom: 1px dashed var(--border-2); position: relative;
}
.flow-step:last-child { border-bottom: none; }
.flow-num {
  width: 44px; height: 44px; border-radius: 10px; background: var(--surface-2);
  border: 1px solid var(--border-2); display: flex; align-items: center; justify-content: center;
  font-family: "IBM Plex Mono", monospace; font-weight: 600; color: var(--accent); font-size: 0.95rem;
}
.flow-title { font-weight: 700; font-size: 1.05rem; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.flow-body { color: var(--ink-soft); font-size: 0.94rem; margin-top: 6px; line-height: 1.55; max-width: 62ch; }
.tag {
  font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; font-weight: 600;
  padding: 3px 8px; border-radius: 5px; letter-spacing: 0.02em;
}
.tag.good { background: var(--good-soft); color: var(--good); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.tag.crit { background: var(--crit-soft); color: var(--crit); }
.tag.accent { background: var(--accent-soft); color: var(--accent); }
.tag.mute { background: var(--surface-2); color: var(--ink-soft); border: 1px solid var(--border-2); }

.split-bar {
  margin-top: 18px; display: flex; height: 34px; border-radius: 8px; overflow: hidden;
  border: 1px solid var(--border);
}
.split-bar > div { display: flex; align-items: center; justify-content: center; font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; font-weight: 600; color: white; }

/* ---------- bar chart ---------- */
.barlist { display: flex; flex-direction: column; gap: 11px; }
.barrow { display: grid; grid-template-columns: 168px minmax(0,1fr) 74px; align-items: center; gap: 12px; }
.barrow .lbl { font-size: 0.85rem; color: var(--ink-soft); text-align: right; }
.barrow .track { height: 12px; background: var(--surface-2); border-radius: 4px; overflow: hidden; border: 1px solid var(--border); }
.barrow .fill { height: 100%; border-radius: 4px 0 0 4px; background: var(--accent); transition: width 1s cubic-bezier(.2,.8,.2,1); width: 0; }
.barrow .val { font-family: "IBM Plex Mono", monospace; font-size: 0.82rem; font-weight: 600; }
@media (max-width: 640px) { .barrow { grid-template-columns: 108px 1fr 56px; } .barrow .lbl { font-size: 0.72rem; } }

/* ---------- gate rules ---------- */
.rule-list { display: flex; flex-direction: column; gap: 10px; }
.rule {
  display: flex; align-items: flex-start; gap: 12px; padding: 13px 14px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; font-size: 0.9rem;
}
.rule .ck {
  flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%; background: var(--good-soft);
  color: var(--good); display: flex; align-items: center; justify-content: center; font-size: 0.72rem; font-weight: 700;
  margin-top: 1px;
}

/* ---------- RAG ablation ---------- */
.versus {
  display: grid; grid-template-columns: minmax(0,1fr) auto minmax(0,1fr); gap: 20px; align-items: stretch; margin-top: 8px;
}
@media (max-width: 760px) { .versus { grid-template-columns: 1fr; } .versus .vs { display: none; } }
.versus .vs {
  align-self: center; font-family: "IBM Plex Mono", monospace; font-weight: 700; color: var(--ink-mute); font-size: 0.85rem;
}
.cond {
  border-radius: 16px; padding: 26px; border: 1.5px solid var(--border-2);
}
.cond.on { background: var(--good-soft); border-color: color-mix(in srgb, var(--good) 45%, transparent); }
.cond.off { background: var(--crit-soft); border-color: color-mix(in srgb, var(--crit) 45%, transparent); }
.cond .ch { display: flex; align-items: center; gap: 9px; margin-bottom: 18px; }
.cond .ch .dot { width: 9px; height: 9px; border-radius: 50%; }
.cond.on .dot { background: var(--good); }
.cond.off .dot { background: var(--crit); }
.cond .ch b { font-family: "IBM Plex Mono", monospace; font-size: 0.85rem; letter-spacing: 0.04em; }
.metric-row { display: flex; justify-content: space-between; align-items: baseline; padding: 11px 0; border-top: 1px solid var(--border); }
.metric-row:first-of-type { border-top: none; }
.metric-row .m-lbl { font-size: 0.85rem; color: var(--ink-soft); }
.metric-row .m-val { font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: 1.18rem; }
.cond.on .m-val { color: var(--good); }
.cond.off .m-val { color: var(--crit); }

.callout {
  margin-top: 26px; padding: 20px 22px; border-radius: 12px; background: var(--surface);
  border: 1px solid var(--border-2); border-left: 3px solid var(--accent); font-size: 0.96rem; line-height: 1.6;
}
.callout b { color: var(--ink); }

/* ---------- cash position ---------- */
.cash-hero {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
}
.cash-hero .amt {
  font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: clamp(2rem, 4.4vw, 3.1rem);
  color: var(--ink);
}
.stack-bar { display: flex; height: 40px; border-radius: 10px; overflow: hidden; margin-top: 22px; border: 1px solid var(--border); }
.stack-bar > div { display: flex; align-items: center; padding-left: 12px; font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; font-weight: 600; color: white; white-space: nowrap; overflow: hidden; }
.legend-row { display: flex; gap: 22px; margin-top: 16px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--ink-soft); }
.legend-item .sw { width: 10px; height: 10px; border-radius: 3px; }

.area-chart { width: 100%; height: auto; margin-top: 8px; }
.area-chart .gridline { stroke: var(--border); stroke-width: 1; }
.area-chart .axislbl { fill: var(--ink-mute); font-family: "IBM Plex Mono", monospace; font-size: 9.5px; }
.area-chart .area-fill { fill: var(--accent); opacity: 0.14; }
.area-chart .area-line { fill: none; stroke: var(--accent); stroke-width: 2.25; stroke-linecap: round; stroke-linejoin: round; }
.area-chart .pt { fill: var(--surface); stroke: var(--accent); stroke-width: 2; }
.area-chart .pt.end { fill: var(--accent); r: 4.5; }

/* ---------- value / close ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 860px) { .value-grid { grid-template-columns: 1fr; } }
.value-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px;
  box-shadow: var(--shadow);
}
.value-card .vn {
  font-family: "IBM Plex Mono", monospace; font-weight: 700; font-size: 2.1rem; color: var(--accent);
}
.value-card h4 { font-size: 1rem; margin-top: 14px; }
.value-card p { color: var(--ink-soft); font-size: 0.9rem; margin-top: 8px; line-height: 1.55; }

/* ---------- roadmap: a real effort/impact prioritization matrix,
   not a decorative grid -- 4 real quadrants, each item drawn from this
   project's own documented, already-reasoned-through limitations. ---------- */
.roadmap-axis {
  display: flex; justify-content: space-between; align-items: center;
  font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; letter-spacing: 0.04em;
  color: var(--ink-mute); text-transform: uppercase; margin-bottom: 14px;
}
.roadmap-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .roadmap-grid { grid-template-columns: 1fr; } }
.roadmap-quadrant h3 { font-size: 1.05rem; margin-top: 12px; }
.roadmap-tag {
  display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: 0.68rem;
  font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; padding: 5px 10px;
  border-radius: 999px;
}
.roadmap-tag.good { background: var(--good-soft); color: var(--good); }
.roadmap-tag.accent { background: var(--accent-soft); color: var(--accent); }
.roadmap-tag.warn { background: var(--warn-soft); color: var(--warn); }
.roadmap-tag.muted { background: var(--ground-2); color: var(--ink-mute); }
.roadmap-list { margin-top: 16px; display: flex; flex-direction: column; gap: 16px; }
.roadmap-list li { list-style: none; font-size: 0.92rem; line-height: 1.55; }
.roadmap-list b { color: var(--ink); }
.roadmap-why {
  display: block; margin-top: 5px; color: var(--accent); font-size: 0.84rem;
  font-style: italic; line-height: 1.5;
}

footer {
  padding: 56px 24px 80px; text-align: center; color: var(--ink-mute); font-size: 0.85rem;
  border-top: 1px solid var(--border);
}
footer .mono { font-size: 0.78rem; }

::selection { background: var(--accent-soft); color: var(--ink); }

a.skip-link:focus {
  position: fixed; top: 8px; left: 8px; background: var(--surface); color: var(--ink);
  padding: 10px 14px; border-radius: 8px; z-index: 999; border: 2px solid var(--accent);
}
a.skip-link { position: absolute; left: -9999px; }

*:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }