/* BusinessSetuper blueprint — Family B: paper + ink + one vermilion pop.
   Fonts self-hosted (copied from COO/chief). Light theme only — a paper
   document to study, not a control room to monitor. */

@font-face { font-family: 'Satoshi'; src: url('fonts/Satoshi-500.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Satoshi'; src: url('fonts/Satoshi-700.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Satoshi'; src: url('fonts/Satoshi-900.woff2') format('woff2'); font-weight: 900; font-display: swap; }
@font-face { font-family: 'JBMono'; src: url('fonts/JetBrainsMono-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'JBMono'; src: url('fonts/JetBrainsMono-700.woff2') format('woff2'); font-weight: 700; font-display: swap; }

:root {
  --paper: #F4F3EF;
  --raise: #FDFDFB;
  --ink: #1B1A17;
  --ink-soft: #45443F;
  --muted: #66655C;
  --faint: #8B8A81;
  --accent: #E8481C;
  --accent-ink: #C33812;
  --working: #2E8B57;
  --good-ink: #1F6B42;
  --caution: #A97B0A;
  --hairline: rgba(27, 26, 23, 0.13);
  --hairline-soft: rgba(27, 26, 23, 0.07);
  --track: rgba(27, 26, 23, 0.08);
  --pop-shadow: 0 8px 28px rgba(27, 26, 23, 0.14);
  --sans: 'Satoshi', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JBMono', ui-monospace, 'SF Mono', monospace;
  --r-outer: 20px;
  --r-inner: 14px;
  --ease: cubic-bezier(0.32, 0.72, 0, 1);
  --z-sticky: 10;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font: 500 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #fff; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.kicker {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.mono { font-family: var(--mono); }

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */

header.top {
  position: sticky; top: 0; z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline-soft);
}
.top-inner {
  display: flex; align-items: center; gap: 14px;
  height: 58px;
}
.wordmark { display: flex; align-items: baseline; gap: 10px; }
.wordmark .star { color: var(--accent); font-size: 15px; }
.wordmark b { font: 700 16px/1 var(--sans); letter-spacing: -0.01em; }
.top-inner nav { margin-left: auto; display: flex; gap: 18px; }
.top-inner nav a {
  font: 700 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted);
}
.top-inner nav a:hover { color: var(--ink); text-decoration: none; }
@media (max-width: 860px) { .top-inner nav { display: none; } .lang-toggle { margin-left: auto; } }
.lang-toggle { flex: none; }
.lang-toggle button { padding: 7px 12px; }

/* ---------- hero ---------- */

.hero { padding: 84px 0 40px; }
.hero h1 {
  font: 900 clamp(30px, 4.6vw, 46px)/1.12 var(--sans);
  letter-spacing: -0.02em;
  max-width: 21ch;
  text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--accent-ink); }
.hero .lede {
  margin-top: 20px; max-width: 62ch;
  font-size: 17px; line-height: 1.6; color: var(--ink-soft);
  text-wrap: pretty;
}
.hero .facts {
  margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px 10px;
  font: 400 12px/1 var(--mono); color: var(--muted);
}
.hero .facts span {
  border: 1px solid var(--hairline); border-radius: 999px;
  padding: 7px 12px; background: var(--raise);
}
.hero .facts span i { font-style: normal; }
.hero .facts .f-real i { color: var(--good-ink); font-weight: 700; }
.hero .facts .f-mock i { color: var(--accent-ink); font-weight: 700; }

/* ---------- sections ---------- */

section { padding: 56px 0 8px; }
.sec-head { max-width: 68ch; margin-bottom: 26px; }
.sec-head h2 {
  font: 700 clamp(21px, 2.6vw, 27px)/1.25 var(--sans);
  letter-spacing: -0.01em; text-wrap: balance;
}
.sec-head p { margin-top: 10px; color: var(--ink-soft); text-wrap: pretty; }

/* ---------- graph canvas (the house layered DAG) ---------- */

.graph-panel {
  background: var(--raise);
  border: 1px solid var(--hairline);
  border-radius: var(--r-outer);
  overflow: hidden;
}
.graph-scroll { overflow-x: auto; overscroll-behavior-x: contain; }
.graph-canvas { position: relative; }
.graph-canvas svg {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: visible;
}

.graph-canvas path.edge {
  fill: none;
  stroke: var(--ink);
  stroke-opacity: 0.16;
  stroke-width: 1.5;
  transition: stroke-opacity 0.2s var(--ease), stroke-width 0.2s var(--ease);
}
.graph-canvas path.edge.ns {
  stroke: var(--accent);
  stroke-dasharray: 2 5;
  stroke-opacity: 0.3;
}
.graph-canvas path.edge.back { stroke-dasharray: 5 4; stroke-opacity: 0.22; }
.graph-canvas path.edge.chain { stroke-opacity: 0.75; stroke-width: 2; }
.graph-canvas path.edge.chain.ns,
.graph-canvas path.edge.flow {
  stroke-opacity: 0.85;
  animation: dagFlow 1s linear infinite;
}
.graph-canvas path.edge.off { stroke-opacity: 0.05; }
.graph-canvas path.edge.leak { stroke: var(--accent); stroke-opacity: 0.7; stroke-width: 2; }
.graph-canvas path.edge.catch { stroke: var(--working); stroke-opacity: 0.65; stroke-width: 2; }
@keyframes dagFlow { to { stroke-dashoffset: -14; } }

.node {
  position: absolute;
  display: flex; flex-direction: column; justify-content: center; gap: 4px;
  padding: 10px 13px;
  background: var(--raise);
  border: 1px solid var(--hairline);
  border-radius: var(--r-inner);
  font-family: var(--sans);
  text-align: left;
  cursor: pointer;
  transition: opacity 0.2s var(--ease), transform 0.15s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.node:hover { transform: translateY(-1px); }
.node:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.node .n-kicker {
  font: 700 9.5px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
  display: flex; align-items: center; gap: 6px;
}
.node .n-kicker .dot {
  width: 6px; height: 6px; border-radius: 50%; flex: none;
  background: var(--working);
}
.node .n-title {
  font: 700 12.5px/1.3 var(--sans); color: var(--ink);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.node .n-sub {
  font: 400 10px/1.35 var(--mono); color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.node.dim { opacity: 0.22; }
.node.sel {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(27, 26, 23, 0.08);
}
.node.ns-node {
  background: transparent;
  border: 1.5px solid var(--accent);
  align-items: flex-start;
}
.node.ns-node .n-kicker { color: var(--accent-ink); }
.node.ns-node .n-title { color: var(--accent-ink); }
.node.mock-node { border-style: dashed; border-color: color-mix(in srgb, var(--accent) 55%, var(--hairline)); }
.node.mock-node .n-kicker .dot { background: transparent; border: 1.5px solid var(--accent); box-sizing: border-box; }

.edge-tag {
  position: absolute; transform: translate(-50%, -50%);
  font: 400 10px/1 var(--mono); color: var(--muted);
  background: var(--raise);
  border: 1px solid var(--hairline-soft);
  border-radius: 999px;
  padding: 4px 8px;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.2s var(--ease);
}
.edge-tag.gate {
  font-weight: 700; letter-spacing: 0.06em;
  color: #fff; background: var(--accent); border-color: var(--accent);
}
.edge-tag.t-leak { color: #fff; background: var(--accent); border-color: var(--accent); font-weight: 700; }
.edge-tag.t-catch { color: #fff; background: var(--working); border-color: var(--working); font-weight: 700; }
.edge-tag.t-watch { color: #fff; background: var(--caution); border-color: var(--caution); font-weight: 700; }
.edge-tag.off { opacity: 0.15; }

.graph-legend {
  display: flex; flex-wrap: wrap; gap: 8px 18px;
  padding: 14px 20px;
  border-top: 1px solid var(--hairline-soft);
  font: 400 11px/1 var(--mono); color: var(--muted);
}
.graph-legend span { display: inline-flex; align-items: center; gap: 7px; }
.graph-legend .sw { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.graph-legend .sw.real { background: var(--working); }
.graph-legend .sw.mock { border: 1.5px dashed var(--accent); box-sizing: border-box; }
.graph-legend .sw.gate { background: var(--accent); border-radius: 999px; }
.graph-legend .sw.ns { border: 1.5px solid var(--accent); box-sizing: border-box; border-radius: 999px; }

/* ---------- stage detail ---------- */

.stage-detail {
  margin-top: 18px;
  background: var(--raise);
  border: 1px solid var(--hairline);
  border-radius: var(--r-outer);
  box-shadow: var(--pop-shadow);
  padding: 28px;
}
.sd-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.sd-head .sd-num { font: 700 13px/1 var(--mono); color: var(--accent-ink); }
.sd-head h3 { font: 700 21px/1.2 var(--sans); letter-spacing: -0.01em; }
.sd-head .sd-tagline { color: var(--muted); font-size: 14px; }
.sd-why { margin-top: 12px; max-width: 72ch; color: var(--ink-soft); text-wrap: pretty; }

.sd-cols {
  margin-top: 22px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 22px;
}
.sd-col h4 {
  font: 700 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
  padding-bottom: 10px; border-bottom: 1px solid var(--hairline-soft);
  display: flex; align-items: center; gap: 8px;
}
.sd-col.col-real h4 { color: var(--good-ink); }
.sd-col.col-mock h4 { color: var(--accent-ink); }
.sd-col h4 .count { color: var(--faint); font-weight: 400; margin-left: auto; }
.sd-col ul { list-style: none; }
.sd-col li { padding: 11px 0; border-bottom: 1px solid var(--hairline-soft); }
.sd-col li:last-child { border-bottom: 0; }
.comp-name { font-weight: 700; font-size: 13.5px; }
.comp-src {
  font: 400 10.5px/1 var(--mono); color: var(--muted);
  margin-top: 4px; display: block;
}
.comp-src b { font-weight: 700; color: var(--ink-soft); }
.comp-note { margin-top: 4px; font-size: 12.5px; color: var(--muted); line-height: 1.5; }

.sd-foot {
  margin-top: 22px; display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
}
.sd-contract, .sd-gate {
  border: 1px solid var(--hairline); border-radius: var(--r-inner);
  padding: 16px 18px;
}
.sd-contract .kicker { color: var(--ink-soft); }
.sd-contract .c-name { font: 700 13px/1.4 var(--mono); margin: 8px 0 4px; }
.sd-contract p, .sd-gate p { font-size: 12.5px; color: var(--muted); line-height: 1.55; }
.sd-gate { border-color: color-mix(in srgb, var(--accent) 45%, var(--hairline)); }
.sd-gate .kicker { color: var(--accent-ink); }
.sd-gate .g-name { font: 700 14px/1.3 var(--sans); margin: 8px 0 4px; }
.sd-gate.none { border-style: dashed; border-color: var(--hairline); }
.sd-gate.none .kicker { color: var(--muted); }

/* ---------- spine ---------- */

.spine {
  margin-top: 18px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-outer);
  background: var(--paper);
  padding: 22px 26px;
}
.spine-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.spine-head h3 { font: 700 15px/1.3 var(--sans); }
.spine-head .kicker { color: var(--accent-ink); }
.spine > p { margin-top: 8px; font-size: 13px; color: var(--muted); max-width: 78ch; }
.spine-mods {
  margin-top: 16px; display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}
.spine-mod {
  background: var(--raise); border: 1px solid var(--hairline-soft);
  border-radius: var(--r-inner); padding: 12px 14px;
}
.spine-mod .m-name { font-weight: 700; font-size: 13px; display: flex; align-items: center; gap: 7px; }
.spine-mod .m-name .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--working); flex: none; }
.spine-mod .m-path { font: 400 10px/1 var(--mono); color: var(--muted); margin-top: 5px; }
.spine-mod .m-note { font-size: 12px; color: var(--muted); margin-top: 6px; line-height: 1.5; }

/* ---------- funnel section ---------- */

.funnel-bar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 16px 20px; border-bottom: 1px solid var(--hairline-soft);
}
.mode-toggle { display: inline-flex; border: 1px solid var(--hairline); border-radius: 999px; overflow: hidden; }
.mode-toggle button {
  font: 700 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  background: transparent; color: var(--muted); border: 0;
  padding: 9px 16px; cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.mode-toggle button.on { background: var(--ink); color: var(--paper); }
.mode-toggle button:not(.on):hover { color: var(--ink); }
.funnel-bar .hint { font: 400 11.5px/1.4 var(--mono); color: var(--muted); }

.funnel-alert {
  display: none;
  margin: 0 20px 18px; padding: 13px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 50%, var(--hairline));
  border-radius: var(--r-inner);
  background: color-mix(in srgb, var(--accent) 6%, var(--raise));
  font-size: 12.5px; line-height: 1.55; color: var(--ink-soft);
}
.funnel-alert.show { display: block; }
.funnel-alert b { color: var(--accent-ink); font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; }

/* ---------- worked example ---------- */

.run-list { list-style: none; max-width: 860px; }
.run-list li {
  position: relative;
  display: grid; grid-template-columns: 56px 1fr; gap: 18px;
  padding: 20px 0;
}
.run-list li + li { border-top: 1px solid var(--hairline-soft); }
.run-num {
  font: 700 20px/1 var(--mono); color: var(--faint);
  padding-top: 2px; text-align: right;
}
.run-body h4 { font: 700 15px/1.3 var(--sans); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.run-body p { margin-top: 7px; color: var(--ink-soft); font-size: 13.5px; max-width: 68ch; text-wrap: pretty; }
.gate-chip {
  font: 700 10px/1 var(--mono); letter-spacing: 0.07em; text-transform: uppercase;
  color: #fff; background: var(--accent);
  border-radius: 999px; padding: 5px 10px;
}

/* ---------- autonomy ---------- */

.auto-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.auto-card {
  background: var(--raise); border: 1px solid var(--hairline);
  border-radius: var(--r-outer); padding: 24px;
}
.auto-card h3 { font: 700 15px/1.3 var(--sans); display: flex; align-items: center; gap: 9px; }
.auto-card h3 .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.auto-card.runs h3 .dot { background: var(--working); animation: pulse 1.6s ease-in-out infinite; }
.auto-card.waits h3 .dot { background: var(--accent); animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
.auto-card ul { list-style: none; margin-top: 14px; }
.auto-card.runs li {
  padding: 8px 0; font-size: 13.5px; color: var(--ink-soft);
  border-bottom: 1px solid var(--hairline-soft);
}
.auto-card.runs li:last-child { border-bottom: 0; }
.auto-card.waits li {
  display: flex; align-items: baseline; gap: 10px;
  padding: 10px 0; border-bottom: 1px solid var(--hairline-soft);
}
.auto-card.waits li:last-child { border-bottom: 0; }
.auto-card.waits .g-id { font: 700 11px/1 var(--mono); color: var(--accent-ink); flex: none; }
.auto-card.waits .g-name { font-weight: 700; font-size: 13.5px; }
.auto-card.waits .g-note { font-size: 12px; color: var(--muted); }
.safety-note {
  margin-top: 18px; padding: 16px 20px;
  border: 1px dashed var(--hairline); border-radius: var(--r-inner);
  font: 400 12px/1.7 var(--mono); color: var(--muted); max-width: 100%;
}

/* ---------- principles ---------- */

.prin-list { list-style: none; border-top: 1px solid var(--hairline); }
.prin-list li {
  display: grid; grid-template-columns: minmax(180px, 260px) minmax(170px, 230px) 1fr; gap: 18px;
  padding: 14px 0; border-bottom: 1px solid var(--hairline-soft);
  align-items: baseline;
}
.prin-list .p-name { font-weight: 700; font-size: 13.5px; }
.prin-list .p-from { font: 400 11px/1.5 var(--mono); color: var(--good-ink); }
.prin-list .p-note { font-size: 13px; color: var(--muted); line-height: 1.55; }
@media (max-width: 760px) {
  .prin-list li { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- roadmap ---------- */

.roadmap-rule {
  margin-top: 16px; font-size: 13px; color: var(--muted);
  max-width: 70ch; text-wrap: pretty;
}

/* ---------- footer ---------- */

footer {
  margin-top: 72px; border-top: 1px solid var(--hairline);
  padding: 34px 0 56px;
}
.foot-inner { display: flex; flex-wrap: wrap; gap: 16px 40px; align-items: baseline; }
.foot-inner .wordmark b { font-size: 14px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 22px; font: 400 12px/1.6 var(--mono); color: var(--muted); }
footer .colophon { margin-top: 14px; font: 400 11px/1.6 var(--mono); color: var(--faint); }

/* ---------- motion safety ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}