:root {
  --bg: #020617;
  --bg-2: #0b1224;
  --card: rgba(15, 23, 42, 0.72);
  --edge: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --blue: #2563eb;
  --blue-hot: #60a5fa;
  --blue-dim: rgba(37, 99, 235, 0.14);
  --ok: #6ee7b7;
  --font-display: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(1200px 500px at 12% -10%, rgba(37, 99, 235, 0.28), transparent 55%),
    radial-gradient(900px 420px at 90% 8%, rgba(14, 165, 233, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 48%, #020617 100%);
}

::selection { background: rgba(37, 99, 235, 0.45); color: #fff; }

a { color: var(--blue-hot); }
a:hover { color: #93c5fd; }

.topbar {
  position: sticky; top: 0; z-index: 30;
  border-bottom: 1px solid rgba(30, 41, 59, 0.9);
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.95rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #fff;
  text-decoration: none;
}
.wordmark span { color: var(--blue-hot); font-weight: 500; }

nav.site {
  display: flex;
  gap: 0.35rem 1rem;
  flex-wrap: wrap;
}
nav.site a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
nav.site a:hover,
nav.site a.active { color: #fff; }

.badge {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-hot);
  background: var(--blue-dim);
  border: 1px solid rgba(37, 99, 235, 0.35);
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.35rem 3rem;
}

.guide-row {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.1rem 0;
}
@media (min-width: 900px) {
  .guide-row {
    flex-direction: row;
    align-items: flex-start;
  }
  .guide-row > .callout {
    flex: 0 0 17rem;
    margin: 0;
  }
  .guide-row > .panel {
    flex: 1 1 auto;
    margin: 0;
  }
}

.hero {
  padding: 4.5rem 0 2.5rem;
  max-width: 42rem;
  animation: rise 0.7s ease-out both;
}

.hero .brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 10vw, 5.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin: 0 0 1.1rem;
  color: #fff;
}
.hero .brand span { color: var(--blue-hot); font-weight: 600; }

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.8vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin: 0 0 0.85rem;
  color: #e2e8f0;
}

.hero .lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}

.btn {
  display: inline-block;
  padding: 0.95rem 1.35rem;
  border-radius: 0.95rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.95rem;
  border: none;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.28);
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { background: #3b82f6; color: #fff; transform: translateY(-1px); }
.btn.ghost {
  background: transparent;
  color: #e2e8f0;
  border: 1px solid var(--edge);
  box-shadow: none;
}
.btn.ghost:hover { border-color: #475569; background: rgba(15, 23, 42, 0.55); color: #fff; }

.hooks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin-top: 1.6rem;
  color: #cbd5e1;
  font-size: 0.92rem;
}
.hooks span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.hooks i {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--ok);
  display: inline-block;
}

.section {
  margin: 2.75rem 0 0;
  animation: rise 0.8s ease-out 0.12s both;
}
.section-label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-hot);
  margin: 0 0 0.75rem;
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.55rem;
  color: #fff;
}
.section .intro {
  margin: 0 0 1.2rem;
  color: var(--muted);
  max-width: 38rem;
}

.steps {
  display: grid;
  gap: 0.85rem;
}
@media (min-width: 800px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

.step {
  padding: 1.15rem 1.2rem 1.25rem;
  border: 1px solid var(--edge);
  border-radius: 1.15rem;
  background: var(--card);
}
.step .n {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-hot);
  margin-bottom: 0.45rem;
}
.step h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: #fff;
}
.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.spotlight {
  margin-top: 1rem;
  padding: 1.35rem 1.4rem 1.45rem;
  border: 1px solid rgba(37, 99, 235, 0.28);
  border-radius: 1.35rem;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), transparent 55%),
    var(--card);
}
.spotlight h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: #fff;
}
.spotlight p { margin: 0.3rem 0; color: #cbd5e1; }
.spotlight .actions { margin-top: 1rem; }

.page-head {
  padding: 2.75rem 0 1.25rem;
  max-width: 44rem;
  animation: rise 0.65s ease-out both;
}
.page-head h1 {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.55rem;
  color: #fff;
}
.page-head p {
  margin: 0;
  color: var(--muted);
  max-width: 38rem;
}

.panel {
  margin: 1.1rem 0;
  padding: 1.2rem 1.25rem 1.3rem;
  border: 1px solid var(--edge);
  border-radius: 1.2rem;
  background: var(--card);
  animation: rise 0.75s ease-out 0.08s both;
}
.panel h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 0.45rem;
  color: #fff;
}
.panel h3 {
  margin: 1rem 0 0.35rem;
  font-size: 1rem;
  color: #e2e8f0;
}
.panel p, .panel li { color: #cbd5e1; }
.panel ul { margin: 0.4rem 0 0.2rem 1.15rem; padding: 0; }
.panel li { margin: 0.3rem 0; }
.panel ul.sample-more {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.panel ul.sample-more li {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--edge);
  border-radius: 0.9rem;
  background: rgba(2, 6, 23, 0.35);
  color: #cbd5e1;
  line-height: 1.45;
  font-size: 0.95rem;
}
.panel ul.sample-more li strong {
  color: #fff;
  font-weight: 700;
}

.source-list {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.9rem;
}
.source-card {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(129, 140, 248, 0.2);
  background: rgba(2, 6, 23, 0.45);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.source-card:hover {
  border-color: rgba(96, 165, 250, 0.45);
  background: rgba(30, 41, 59, 0.55);
}
.source-card strong {
  display: block;
  color: #fff;
  margin-bottom: 0.25rem;
}
.source-card .k {
  display: block;
  margin-top: 0.35rem;
  color: #93c5fd;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}
.source-card .v {
  display: block;
  color: #e2e8f0;
  font-size: 0.95rem;
  line-height: 1.4;
}

.fact-row {
  display: grid;
  gap: 0.35rem 1rem;
  margin: 0.85rem 0;
}
@media (min-width: 640px) {
  .fact-row { grid-template-columns: 8.5rem 1fr; }
}
.fact-row .lbl {
  color: var(--blue-hot);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.fact-row .val { color: #e2e8f0; }

.callout {
  margin: 1.25rem 0;
  padding: 0.95rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(37, 99, 235, 0.28);
  background: var(--blue-dim);
  color: #93c5fd;
  font-size: 0.98rem;
}
.callout ul {
  margin: 0.6rem 0 0;
  padding: 0 0 0 1.1rem;
}
.callout li {
  margin: 0.35rem 0;
}
.callout-guide {
  border: 1px solid rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.08);
  color: #fde68a;
  font-size: 0.93rem;
}
.callout-guide strong {
  color: #fbbf24;
}
.callout-guide p {
  color: #fde68a;
}

.color-legend {
  display: flex;
  gap: 1.5rem;
  margin: 0.5rem 0 1rem;
  font-size: 0.88rem;
  color: #94a3b8;
}
.color-legend span::before {
  content: "";
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 3px;
  margin-right: 0.4rem;
  vertical-align: middle;
}
.color-legend .leg-guide::before {
  background: rgba(251, 191, 36, 0.5);
}
.color-legend .leg-data::before {
  background: rgba(37, 99, 235, 0.4);
}

.disclaimer {
  margin-top: 2rem;
  padding: 1rem 1.1rem;
  border: 1px dashed #334155;
  border-radius: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.graph-block {
  margin: 1.5rem 0 0;
  padding: 1.2rem 1.15rem 1.35rem;
  border: 1px solid var(--edge);
  border-radius: 1.2rem;
  background: var(--card);
}
.graph-block h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
  color: #fff;
}
.graph-block .graph-lead {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 40rem;
}
.graph-stage {
  width: 100%;
  overflow-x: auto;
  border-radius: 1rem;
  border: 1px solid rgba(30, 41, 59, 0.95);
  background: rgba(2, 6, 23, 0.55);
}
.graph-stage svg {
  display: block;
  width: 100%;
  min-width: 680px;
  height: auto;
}
.g-node {
  cursor: default;
}
a .g-node {
  cursor: pointer;
}
.g-node:focus { outline: none; }
a .g-node:focus .g-hit,
a .g-node:hover .g-hit {
  stroke: #93c5fd;
  stroke-width: 2;
}
.g-hit { fill: #0f172a; stroke: #334155; stroke-width: 1.5; }
.g-hit.money { stroke: #34d399; }
.g-hit.doc { stroke: #fbbf24; }
.g-hit.actor { stroke: #38bdf8; }
.g-label {
  fill: #f1f5f9;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-anchor: middle;
  pointer-events: none;
}
.g-sub {
  fill: #cbd5e1;
  font-family: var(--font-body);
  font-size: 12px;
  text-anchor: middle;
  pointer-events: none;
}
.g-meta {
  fill: #94a3b8;
  font-family: var(--font-body);
  font-size: 11px;
  text-anchor: middle;
  pointer-events: none;
}
.g-amount {
  fill: #6ee7b7;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  text-anchor: middle;
  pointer-events: none;
}
.g-edge {
  stroke: #475569;
  stroke-width: 2;
  fill: none;
  marker-end: url(#arrow);
}
.g-edge-label {
  fill: #64748b;
  font-family: var(--font-body);
  font-size: 11px;
  text-anchor: middle;
}
.source-card:target {
  border-color: rgba(96, 165, 250, 0.55);
  background: rgba(30, 41, 59, 0.75);
}

footer {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem 1.35rem 2.75rem;
  border-top: 1px solid var(--edge);
  color: var(--muted);
  font-size: 0.88rem;
}
footer .wordmark { font-size: 1rem; }
footer a { color: var(--blue-hot); }

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}