:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f5f6f7;
  --text: #1f2328;
  --muted: #5c6370;
  --border: #d0d4da;
  --warning: #8a5a00;
  --error: #b3261e;
  --link: #0b63c5;
  /* One color per field, in its row and in its bits. */
  --epoch: #00727f;
  --perigee: #9a3cc0;
  --inclination: #8a6100;
  --raan: #1a66c2;
  --drag: #c62f3b;
  --lambda: #2c7d32;
  --motion: #00639b;
  --eccentricity: #b02a86;
  --marker: #7b8290;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d2026;
    --surface: #262a32;
    --text: #dcdfe4;
    --muted: #9aa1ad;
    --border: #414752;
    --warning: #e5c07b;
    --error: #f28b82;
    --link: #7ab7ff;
    --epoch: #56b6c2;
    --perigee: #c678dd;
    --inclination: #e5c07b;
    --raan: #61afef;
    --drag: #e06c75;
    --lambda: #98c379;
    --motion: #8be9fd;
    --eccentricity: #f09ad8;
    --marker: #8b919c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 760px;
  padding: 32px 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 { margin: 0; font: 700 32px/1.2 var(--mono); }
h2 { margin: 0; font-size: 15px; font-weight: 700; }
header p { margin: 4px 0 28px; color: var(--muted); }
a, .link { color: var(--link); }

.input-label, .section-title {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 6px;
}

label { font-weight: 700; font-size: 15px; }

button {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
button.link, button.copy { min-height: 24px; text-decoration: underline; }
button.copy { color: var(--muted); }

textarea {
  display: block;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: 14px/1.5 var(--mono);
  resize: vertical;
}

section { margin-top: 24px; }

pre {
  margin: 0;
  padding: 12px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font: 13px/1.5 var(--mono);
}

.warning { margin-top: 24px; color: var(--warning); }
.warning strong { font-weight: 700; }

.checks { margin: 0; padding-left: 20px; color: var(--error); }

/* The bit layout */
.card {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font: 13px/1.6 var(--mono);
}
.card table { width: 100%; border-collapse: collapse; }
.card tbody + tbody { border-top: 1px solid var(--border); }
.card th, .card td { padding: 2px 12px; text-align: left; white-space: nowrap; font-weight: 400; }
.card tbody tr:first-child > * { padding-top: 10px; }
.card tbody tr:last-child > * { padding-bottom: 10px; }
.card tbody > tr > :first-child { width: 1%; border-right: 1px solid var(--border); }
.card td.bits { white-space: pre; }
.card .bit-map { border-top: 1px solid var(--border); }

/* Declared after the base rules, so the field color wins on labels and bits. */
.f-epoch { color: var(--epoch); }
.f-perigee { color: var(--perigee); }
.f-inclination { color: var(--inclination); }
.f-raan { color: var(--raan); }
.f-drag { color: var(--drag); }
.f-lambda { color: var(--lambda); }
.f-motion { color: var(--motion); }
.f-eccentricity { color: var(--eccentricity); }
.f-marker { color: var(--marker); }

footer { margin-top: 40px; color: var(--muted); font-size: 14px; }
footer p { margin: 0; }