@font-face {
  font-family: "DM Sans";
  src: url("assets/dm-sans.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("assets/dm-sans-bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "League Gothic";
  src: url("assets/league-gothic.ttf") format("truetype");
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #101510;
  --surface: #181f19;
  --dark: #101712;
  --ink: #f2f3e8;
  --muted: #bcc6b8;
  --quiet: #aab6a8;
  --accent: #daf995;
  --line: #404d40;
  --display: "League Gothic", "Arial Narrow", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font: 1rem/1.55 "DM Sans", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
body, p, h1, h2, h3, figure, dl, dd { margin: 0; }
a { color: inherit; }
button, select { font: inherit; }
strong { color: var(--ink); }
img, svg { display: block; max-inline-size: 100%; }
::selection { color: var(--dark); background: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.shell { width: min(100% - clamp(2rem, 10vw, 9rem), 1290px); margin-inline: auto; }
section[id] { scroll-margin-top: 1.5rem; }

.skip { position: absolute; z-index: 2; inset: .8rem auto auto 1rem; padding: .65rem 1rem; transform: translateY(-200%); color: var(--bg); background: var(--accent); }
.skip:focus { transform: none; }
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  min-height: 76px;
  border-bottom: 1px solid var(--line);
}
.byline, .masthead nav { display: flex; align-items: center; }
.byline { gap: .65rem; font-weight: 700; text-decoration: none; }
.initials {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  flex: 0 0 auto;
  background: var(--ink);
  color: var(--bg);
  font: 1.45rem/1 var(--display);
}
.masthead nav { flex-wrap: wrap; gap: .35rem clamp(.75rem, 2.8vw, 2.4rem); }
.masthead nav a { color: var(--muted); text-decoration: none; font-size: .92rem; font-weight: 700; }
.masthead nav a:hover, .footer a:hover { color: var(--accent); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(1.5rem, 5vw, 6rem);
  padding-block: clamp(2.8rem, 6vw, 6rem) clamp(2rem, 5vw, 4.6rem);
}
.kicker {
  color: var(--accent);
  font-size: .76rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.hero h1, .chapter h2, .takeaway h2 {
  font: 400 clamp(4.3rem, 8.9vw, 10rem)/.82 var(--display);
  letter-spacing: -.012em;
  text-transform: uppercase;
}
.hero h1 { margin-block: .2em .21em; }
.hero h1 span, .support h3 span { color: var(--accent); }
.deck, .section-deck { color: var(--muted); font-size: clamp(1.04rem, 1.55vw, 1.29rem); line-height: 1.52; }
.deck { max-width: 39ch; }
.action {
  display: inline-block;
  padding: .58rem .92rem;
  margin-top: 1.2rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}
.action:hover { background: var(--accent); color: var(--bg); }
.hero-art { min-width: 0; }
.hero-art img {
  width: 100%;
  height: auto;
  aspect-ratio: 1.24;
  object-fit: cover;
  object-position: 59% 51%;
  view-transition-name: football-cover;
}
.hero-art figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: .55rem;
  color: var(--quiet);
  font-size: .68rem;
  letter-spacing: .12em;
}

.numbers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--line);
}
.numbers div { padding: .85rem clamp(.7rem, 3.6vw, 3.25rem); }
.numbers div:first-child { padding-left: 0; }
.numbers div + div { border-left: 1px solid var(--line); }
.numbers dt { color: var(--muted); font-size: clamp(.82rem, 1.3vw, .98rem); line-height: 1.25; }
.numbers dd { margin-top: .15em; font: 400 clamp(2.8rem, 6vw, 5rem)/.95 var(--display); }

.chapter {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  gap: clamp(1.1rem, 5vw, 5.6rem);
  align-items: end;
}
.story { padding-block: clamp(3.8rem, 8vw, 7.8rem); align-items: start; }
.chapter h2, .takeaway h2 { margin-top: .14em; font-size: clamp(3.6rem, 7.2vw, 7.1rem); }
.story-copy { color: var(--muted); font-size: clamp(1.03rem, 1.4vw, 1.2rem); line-height: 1.64; max-width: 64ch; }
.story-copy p + p { margin-top: 1rem; }
.transfer-section, .comparison { background: var(--surface); border-block: 1px solid var(--line); padding-block: clamp(3.25rem, 7vw, 6.8rem); }
.comparison { background: #121a14; border-top: 0; }
.explore-intro, .compare-intro { margin-bottom: clamp(1.6rem, 4vw, 3.1rem); }
.scope-note { max-width: 85ch; color: var(--muted); margin-top: 1.15rem; font-size: .93rem; }
.case-panel + .case-panel { margin-top: clamp(2.8rem, 5.9vw, 5.25rem); }
.case-panel-heading { margin-bottom: 1.1rem; }
.case-panel-heading h3 { margin-block: .12em .22em; font-size: clamp(1.55rem, 3.8vw, 2.9rem); line-height: 1.07; letter-spacing: -.045em; }
.case-panel-heading > p:last-child { color: var(--muted); max-width: 65ch; }
.no-script { padding: 1rem; border: 1px solid var(--line); color: var(--muted); }

.viz-panel {
  padding: clamp(.9rem, 3vw, 2.4rem);
  background: var(--dark);
  border: 1px solid var(--line);
}
.viz-toolbar { display: flex; flex-wrap: wrap; gap: .65rem 1.1rem; align-items: center; margin-bottom: 1.1rem; }
.viz-group { display: inline-flex; flex-wrap: wrap; gap: .22rem; padding: .18rem; border: 1px solid var(--line); }
.viz-button {
  min-height: 2.4rem;
  padding: .38rem .63rem;
  background: none;
  color: var(--muted);
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 700;
  font-size: .89rem;
}
.viz-button:hover { color: var(--ink); }
.viz-button[aria-pressed="true"] { background: var(--accent); color: var(--dark); }
.viz-select-label { color: var(--muted); font-weight: 700; }
.viz-select { min-height: 2.45rem; padding: .3rem .7rem; background: var(--surface); color: var(--ink); border: 1px solid var(--line); }
.viz-callout { display: flex; align-items: baseline; flex-wrap: wrap; gap: .2rem .95rem; margin-bottom: 1.15rem; }
.viz-stat { color: var(--accent); font: 400 clamp(2.25rem, 4.5vw, 4rem)/1 var(--display); }
.viz-note, .viz-transfer-note, .viz-range-legend { color: var(--muted); font-size: .92rem; line-height: 1.48; }
.viz-note { max-width: 68ch; }
.viz-transfer-note { margin-top: .85rem; }
.viz-figure { margin: 0; }
.viz-svg { width: 100%; height: auto; }
.viz-legend { display: flex; flex-wrap: wrap; gap: .4rem 1.3rem; margin: .8rem 0 .65rem; padding: 0; list-style: none; }
.viz-legend-item { display: inline-flex; align-items: center; gap: .35rem; font-size: .84rem; }
.viz-swatch { display: inline-block; inline-size: .72rem; block-size: .72rem; }
.viz-leaders { display: grid; gap: .45rem; margin: .65rem 0 1rem; padding: 0; list-style: none; }
.viz-leader { display: grid; grid-template-columns: 1.4rem minmax(6rem, 10rem) minmax(2rem, 1fr) 2rem; gap: .3rem .7rem; align-items: center; line-height: 1.18; }
.viz-rank, .viz-count { font-variant-numeric: tabular-nums; color: var(--muted); }
.viz-count { text-align: end; }
.viz-name { font-weight: 700; }
.viz-merged { color: var(--quiet); font-size: .73rem; }
.viz-bar { height: .55rem; background: #2a352b; }
.viz-bar-fill { display: block; height: 100%; background: var(--accent); }
.viz-data { border-top: 1px solid var(--line); padding-top: .55rem; margin-top: .8rem; }
.viz-data summary { width: fit-content; color: var(--muted); cursor: pointer; font-size: .88rem; }
.viz-table-wrap { overflow-x: auto; margin-top: .55rem; }
.viz-table { border-collapse: collapse; width: 100%; font-size: .85rem; text-align: left; }
.viz-table :is(th, td) { border-bottom: 1px solid var(--line); padding: .38rem .65rem .38rem 0; white-space: nowrap; }
.viz-table caption { text-align: left; padding-bottom: .4rem; color: var(--muted); }

.context { align-items: start; padding-block: clamp(3.8rem, 8vw, 7.8rem); }
.context .section-deck { margin-top: 1rem; max-width: 33ch; }
.support { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.support article { border-top: 1px solid var(--line); padding-top: .8rem; }
.support h3 { margin-block: .08em .12em; font: 400 clamp(2.8rem, 6vw, 5.2rem)/1 var(--display); }
.support article > p:last-child { color: var(--muted); font-size: .95rem; line-height: 1.5; }
.takeaway {
  display: grid;
  grid-template-columns: minmax(0, .42fr) minmax(0, 1fr);
  gap: .8rem 1.5rem;
  border-top: 1px solid var(--line);
  padding-block: clamp(2.15rem, 5vw, 4.4rem);
}
.takeaway h2 { margin-top: 0; }
.takeaway div > p { margin-top: .8rem; max-width: 64ch; color: var(--muted); font-size: 1.08rem; }
.footer { display: flex; flex-wrap: wrap; gap: .55rem 1rem; justify-content: space-between; border-top: 1px solid var(--line); padding-block: 1.2rem 1.75rem; color: var(--muted); font-size: .85rem; }
.footer a { text-underline-offset: .23em; }

@media (prefers-reduced-motion: no-preference) {
  @view-transition { navigation: auto; }
  ::view-transition-group(football-cover) { animation-duration: 640ms; animation-timing-function: cubic-bezier(.22,.78,.22,1); }
  ::view-transition-old(root), ::view-transition-new(root) { animation-duration: 330ms; }
}

@media (max-width: 720px) {
  .masthead { min-height: 65px; }
  .masthead nav a { font-size: .84rem; }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero h1 { font-size: clamp(4.1rem, 13.2vw, 7.8rem); }
  .hero-art img { aspect-ratio: 1.7; }
  .chapter, .takeaway { grid-template-columns: 1fr; }
  .chapter h2 br { display: none; }
}

@media (max-width: 480px) {
  .masthead { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: .65rem; }
  .masthead nav { width: 100%; justify-content: space-between; gap: .3rem; }
  .masthead nav a { padding-block: .22rem; }
  .hero { padding-top: 2.3rem; }
  .numbers div { padding-inline: .45rem; }
  .numbers dt { min-height: 2.1em; }
  .viz-panel { padding: .72rem; }
  .viz-leader { grid-template-columns: 1.1rem minmax(6rem, 1fr) minmax(2.5rem, .75fr) 1.75rem; gap: .3rem; font-size: .86rem; }
  .support { grid-template-columns: 1fr; }
}

.course { margin-top: .65rem; color: var(--quiet); font-size: .9rem; }
.database-section { padding-block: clamp(3.8rem, 8vw, 7rem); }
.database-section .story { padding-block: 0; margin-bottom: 2rem; }
.schema-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(.5rem, 2.5vw, 1.8rem);
}
.schema-node { padding: .85rem clamp(.7rem, 2.3vw, 1.4rem); border: 1px solid var(--line); background: var(--surface); }
.schema-node h3 { margin-bottom: .14rem; font-size: clamp(1rem, 2vw, 1.35rem); }
.schema-node p, .schema-note { color: var(--muted); font-size: .92rem; }
.schema-join { color: var(--accent); font-size: .75rem; letter-spacing: .08em; white-space: nowrap; }
.schema-join span { opacity: .65; }
.schema-note { margin-top: .85rem; max-width: 76ch; }
.viz-dashboard-plot { max-width: 780px; }
.viz-dashboard-note { margin-block: .6rem; }

@media (max-width: 480px) {
  .schema-flow { grid-template-columns: minmax(0, 1fr); gap: .4rem; }
  .schema-join { padding-inline: .8rem; }
}

[data-chart="dashboard"] .viz-leader { grid-template-columns: 1.4rem minmax(6rem, 10rem) minmax(2rem, 1fr) 3rem; }
@media (max-width: 480px) {
  [data-chart="dashboard"] .viz-leader { grid-template-columns: 1.1rem minmax(6rem, 1fr) minmax(2rem, .75fr) 2.8rem; }
}

.sample-query { margin-top: 1.35rem; }
.sample-query summary { cursor: pointer; width: fit-content; font-weight: 700; color: var(--accent); }
.sample-query pre {
  overflow-x: auto;
  margin: .7rem 0 0;
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: .86rem;
  line-height: 1.5;
}