:root {
  --bg:       #07080f;
  --surface:  #0d0f1a;
  --border:   #1e2035;
  --muted:    #3a3d55;
  --dim:      #7a7e99;
  --body:     #c8cadc;
  --bright:   #ecedf5;
  --accent:   #4f9bff;
  --accent2:  #7fd8c8;
  --gold:     #e8c46a;
  --serif:    'Plus Jakarta Sans', system-ui, sans-serif;
  --display:  'Cormorant Garamond', Georgia, serif;
  --sans:     'Inter', system-ui, sans-serif;
  --mono:     'Space Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--body);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

nav, .page-wrap, footer { position: relative; z-index: 1; }

::selection { background: rgba(79,155,255,0.25); color: var(--bright); }
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-thumb { background: var(--muted); }

/* ── LAYOUT ── */
.page-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── NAV ── */
nav {
  border-bottom: 1px solid var(--border);
  padding: 1.1rem 0;
  position: sticky;
  top: 0;
  background: rgba(7,8,15,0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
}

nav .inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-brand:hover { color: var(--accent2); }

.nav-by {
  color: var(--dim);
  letter-spacing: 0.12em;
}

.nav-brand:hover .nav-by { color: var(--accent2); }

.nav-meta {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--dim);
  letter-spacing: 0.08em;
}

/* ── HERO ── */
.hero {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.hero-tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
}

h1 {
  font-family: var(--display);
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 700;
  font-style: italic;
  line-height: 1.06;
  color: var(--bright);
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.hero-deck {
  font-size: 1.15rem;
  color: var(--body);
  max-width: 58ch;
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: 2rem;
}

.hero-byline {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--dim);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.byline-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.byline-label {
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.55rem;
}

.byline-val {
  color: var(--accent2);
}

.byline-sep {
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1;
}

/* ── VISUALIZATION ── */
.viz-wrap {
  margin: 3rem 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.viz-label {
  padding: 0.75rem 1.2rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--dim);
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viz-label .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent2);
  display: inline-block;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

.viz-canvas {
  width: 100%;
  display: block;
}

.viz-caption {
  padding: 0.8rem 1.2rem;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--dim);
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* ── ARTICLE BODY ── */
article {
  padding: 3rem 0;
}

article p {
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--body);
  margin-bottom: 1.5em;
  font-weight: 400;
}

article p:first-of-type::first-letter {
  font-family: var(--display);
  font-size: 4rem;
  font-weight: 700;
  font-style: italic;
  color: var(--accent);
  float: left;
  line-height: 0.78;
  margin-right: 0.06em;
  margin-top: 0.1em;
}

article h2 {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--bright);
  margin: 2.5rem 0 1rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

article h2::before {
  content: '§';
  color: var(--accent);
  font-size: 0.9rem;
  margin-right: 0.5rem;
  font-weight: 300;
  opacity: 0.7;
}

/* ── PULL QUOTE ── */
blockquote {
  margin: 2.5rem 0;
  padding: 1.5rem 1.8rem;
  border-left: 2px solid var(--accent);
  background: var(--surface);
}

blockquote p {
  font-family: var(--serif);
  font-size: 1.05rem !important;
  font-style: italic;
  font-weight: 400;
  color: var(--bright) !important;
  margin-bottom: 0.5em !important;
  line-height: 1.7 !important;
}

blockquote p::first-letter { all: unset; }

blockquote cite {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-transform: uppercase;
}

/* ── DATA CALLOUT ── */
.data-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  margin: 2.5rem 0;
  border: 1px solid var(--border);
}

.data-cell {
  background: var(--surface);
  padding: 1.4rem;
}

.data-num {
  font-family: var(--serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -0.02em;
}

.data-unit {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--accent2);
  text-transform: uppercase;
  margin: 0.3rem 0;
}

.data-desc {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--dim);
  font-weight: 300;
}

/* ── INLINE NOTE ── */
.note {
  margin: 2rem 0;
  padding: 1rem 1.2rem;
  background: rgba(79,155,255,0.06);
  border: 1px solid rgba(79,155,255,0.15);
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--dim);
  line-height: 1.7;
  letter-spacing: 0.04em;
}

.note strong {
  color: var(--accent);
  font-weight: 400;
}

/* ── COMPARISON TABLE ── */
.compare {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.85rem;
}

.compare th {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-weight: 400;
}

.compare td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--body);
  font-weight: 300;
  vertical-align: top;
}

.compare tr:last-child td { border-bottom: none; }
.compare td:first-child { color: var(--bright); font-weight: 400; }

.compare tr:hover td { background: var(--surface); }

.tag-new {
  display: inline-block;
  background: rgba(79,155,255,0.12);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.5rem;
  letter-spacing: 0.15em;
  padding: 0.15rem 0.45rem;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 0.4rem;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-source {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--dim);
  line-height: 1.9;
  letter-spacing: 0.04em;
}

.footer-source a {
  color: var(--accent);
  text-decoration: none;
}

.footer-source a:hover { text-decoration: underline; }

.footer-tag {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-tag a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(79,155,255,0.3);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-tag a:hover {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
}

.note a {
  color: var(--accent2);
  text-decoration: none;
  border-bottom: 1px solid rgba(127,216,200,0.3);
}
.note a:hover { border-bottom-color: var(--accent2); }

article a {
  color: var(--accent2);
  text-decoration: none;
  border-bottom: 1px solid rgba(127,216,200,0.3);
}
article a:hover { border-bottom-color: var(--accent2); }

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── VIZ EXPAND AFFORDANCE ── */
.viz-wrap {
  cursor: pointer;
  transition: border-color 0.25s ease;
}
.viz-wrap:hover {
  border-color: var(--accent);
}
.viz-expand-hint {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
  transition: color 0.2s ease;
}
.viz-wrap:hover .viz-expand-hint { color: var(--accent); }
.viz-expand-hint svg { flex-shrink: 0; }

/* ── VIZ MODAL ── */
.viz-modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}
.viz-modal[hidden] { display: none; }

.viz-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 6, 12, 0.88);
  backdrop-filter: blur(6px);
}

.viz-modal-inner {
  position: relative;
  z-index: 1;
  width: 92vw;
  max-width: 1280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
  animation: modal-in 0.22s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.97) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.viz-modal-header {
  padding: 0.75rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viz-modal-title {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--dim);
  text-transform: uppercase;
}

.viz-modal-close {
  background: none;
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1;
  width: 1.6rem;
  height: 1.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, border-color 0.15s ease;
  border-radius: 1px;
}
.viz-modal-close:hover {
  color: var(--bright);
  border-color: var(--accent);
}

.viz-modal-canvas {
  display: block;
  width: 100%;
  height: 72vh;
}

.viz-modal-caption {
  padding: 0.75rem 1.2rem;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--dim);
  line-height: 1.6;
  letter-spacing: 0.04em;
}