/* Gridiron Signal — original football visual grammar.
   Field-dark editorial surfaces, chalk typography, yard-line rhythm.
   Not a sportsbook, not a broadcast package, not a dashboard card soup. */

:root {
  --field: #0d1512;
  --panel: #131e18;
  --panel-2: #17251d;
  --line: #2b3d33;
  --chalk: #eef1e8;
  --chalk-dim: #a9b5a5;
  --amber: #e2a65c;
  --turf: #6fbc84;
  --alert: #d98a76;
  --maxw: 68rem;
  --sans: system-ui, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--field);
  color: var(--chalk);
  font-family: var(--sans);
  line-height: 1.55;
  font-variant-numeric: tabular-nums;
}

a { color: var(--turf); text-underline-offset: 3px; }
a:hover { color: var(--chalk); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: 2px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #101a15, var(--field));
}
.site-header .wrap {
  display: flex; flex-wrap: wrap; gap: 0.75rem 2rem;
  align-items: baseline; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.brand {
  font-weight: 800; letter-spacing: 0.14em; font-size: 1.05rem;
  color: var(--chalk); text-decoration: none;
}
.brand .accent { color: var(--amber); }
.site-nav { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.site-nav a { color: var(--chalk-dim); text-decoration: none; font-size: 0.95rem; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--chalk); }

/* Hero with yard-line rhythm */
.hero {
  padding: 3.5rem 0 2.5rem;
  background-image: repeating-linear-gradient(
    90deg, transparent 0 calc(10% - 1px), rgba(238, 241, 232, 0.045) calc(10% - 1px) 10%
  );
  border-bottom: 1px solid var(--line);
}
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0 0 0.6rem; line-height: 1.15; }
.hero p.lede { color: var(--chalk-dim); font-size: 1.1rem; max-width: 46rem; margin: 0; }
.hero .creed {
  margin-top: 1.4rem; font-family: var(--mono); font-size: 0.95rem; color: var(--amber);
}

/* Sections */
section { padding: 2.2rem 0; }
section + section { border-top: 1px solid var(--line); }
h2 { font-size: 1.25rem; letter-spacing: 0.04em; margin: 0 0 1rem; }
h2 .tick { color: var(--amber); }
h3 { font-size: 1.02rem; margin: 1.2rem 0 0.4rem; }
p, li { color: var(--chalk-dim); }
p strong, li strong { color: var(--chalk); }

/* Panels and cards */
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 6px; padding: 1.1rem 1.25rem;
}
.grid { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  padding: 0.95rem 1.05rem; display: flex; flex-direction: column; gap: 0.35rem;
}
.card .name { font-weight: 700; letter-spacing: 0.06em; }
.card .long { color: var(--chalk-dim); font-size: 0.86rem; }
.card .unit { font-family: var(--mono); font-size: 0.78rem; color: var(--chalk-dim); }
.card .meta { margin-top: auto; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }

.badge {
  display: inline-block; font-family: var(--mono); font-size: 0.72rem;
  padding: 0.1rem 0.5rem; border-radius: 999px; border: 1px solid var(--line);
  color: var(--chalk-dim); text-transform: uppercase; letter-spacing: 0.08em;
}
.badge.scaffold { border-color: var(--amber); color: var(--amber); }
.badge.concept { border-color: var(--line); color: var(--chalk-dim); }
.badge.research { border-color: var(--turf); color: var(--turf); }
.badge.pass { border-color: var(--turf); color: var(--turf); }
.badge.tier { border-color: var(--line); }

/* Freshness rail */
.rail { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.rail .chip {
  font-family: var(--mono); font-size: 0.8rem; padding: 0.25rem 0.6rem;
  border: 1px solid var(--line); border-radius: 4px; color: var(--chalk-dim);
}
.rail .chip .ok { color: var(--turf); }

/* Tables */
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
caption { text-align: left; color: var(--chalk-dim); padding-bottom: 0.5rem; }
th, td { text-align: left; padding: 0.45rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--chalk); font-weight: 600; }
td { color: var(--chalk-dim); }
.table-scroll { overflow-x: auto; }
code, .mono { font-family: var(--mono); font-size: 0.85em; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line); margin-top: 2.5rem;
  padding: 1.6rem 0 2.2rem; color: var(--chalk-dim); font-size: 0.88rem;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; align-items: baseline; }

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