:root {
  color-scheme: dark light;
  --bg: #061016;
  --bg-soft: #0a1720;
  --panel: #0d1c25;
  --panel-2: #132a36;
  --text: #f4fbff;
  --muted: #b6c8d2;
  --link: #8ee6ff;
  --link-visited: #caa8ff;
  --accent: #58e6a6;
  --accent-2: #ffb86b;
  --danger: #ff7d7d;
  --border: rgba(255,255,255,0.15);
  --shadow: rgba(0,0,0,0.35);
  --table-stripe: rgba(255,255,255,0.045);
  --focus: #ffe27a;
  --max: 1180px;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f9fb;
  --bg-soft: #eef5f8;
  --panel: #ffffff;
  --panel-2: #edf4f7;
  --text: #10202a;
  --muted: #51646f;
  --link: #005f83;
  --link-visited: #5d3d92;
  --accent: #007a4d;
  --accent-2: #9a4b00;
  --danger: #9b1c1c;
  --border: rgba(16,32,42,0.18);
  --shadow: rgba(16,32,42,0.10);
  --table-stripe: rgba(0,95,131,0.06);
  --focus: #7a4d00;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(circle at top left, rgba(88,230,166,0.10), transparent 28rem),
    radial-gradient(circle at top right, rgba(142,230,255,0.10), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

body::before, body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* CPU-safe starfield.
   Static layered gradients give the dark theme a denser night-sky texture
   with fixed stars of varied apparent brightness. Avoid animation/filter here:
   those can make Firefox repaint constantly on some Linux/GPU stacks. */
body::before {
  background:
    /* bright anchor stars: keep this population sparse */
    radial-gradient(circle at 4% 12%, rgba(255,255,255,0.96) 0 1.35px, transparent 2.45px),
    radial-gradient(circle at 18% 73%, rgba(255,255,255,0.88) 0 1.25px, transparent 2.25px),
    radial-gradient(circle at 31% 28%, rgba(255,255,255,0.92) 0 1.30px, transparent 2.35px),
    radial-gradient(circle at 52% 84%, rgba(255,255,255,0.90) 0 1.28px, transparent 2.30px),
    radial-gradient(circle at 68% 19%, rgba(255,255,255,0.94) 0 1.32px, transparent 2.40px),
    radial-gradient(circle at 91% 61%, rgba(255,255,255,0.90) 0 1.25px, transparent 2.25px),
    /* medium stars */
    radial-gradient(circle at 9% 48%, rgba(255,255,255,0.66) 0 1.05px, transparent 1.95px),
    radial-gradient(circle at 14% 86%, rgba(210,235,255,0.62) 0 1.0px, transparent 1.9px),
    radial-gradient(circle at 24% 16%, rgba(255,255,255,0.58) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 36% 62%, rgba(255,255,255,0.68) 0 1.05px, transparent 1.95px),
    radial-gradient(circle at 43% 39%, rgba(190,225,255,0.58) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 57% 11%, rgba(255,255,255,0.60) 0 1.0px, transparent 1.9px),
    radial-gradient(circle at 61% 53%, rgba(255,255,255,0.70) 0 1.08px, transparent 2.0px),
    radial-gradient(circle at 73% 78%, rgba(210,235,255,0.60) 0 1.0px, transparent 1.9px),
    radial-gradient(circle at 82% 35%, rgba(255,255,255,0.64) 0 1.02px, transparent 1.9px),
    radial-gradient(circle at 96% 91%, rgba(255,255,255,0.58) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 5% 92%, rgba(210,235,255,0.50) 0 0.90px, transparent 1.7px),
    radial-gradient(circle at 19% 36%, rgba(255,255,255,0.54) 0 0.92px, transparent 1.75px),
    radial-gradient(circle at 29% 79%, rgba(255,255,255,0.56) 0 0.94px, transparent 1.78px),
    radial-gradient(circle at 47% 24%, rgba(190,225,255,0.52) 0 0.90px, transparent 1.7px),
    radial-gradient(circle at 70% 66%, rgba(255,255,255,0.55) 0 0.93px, transparent 1.75px),
    radial-gradient(circle at 89% 47%, rgba(210,235,255,0.51) 0 0.90px, transparent 1.7px),
    /* faint texture stars */
    radial-gradient(circle at 6% 67%, rgba(255,255,255,0.38) 0 0.75px, transparent 1.45px),
    radial-gradient(circle at 11% 31%, rgba(255,255,255,0.26) 0 0.55px, transparent 1.10px),
    radial-gradient(circle at 17% 58%, rgba(190,225,255,0.24) 0 0.52px, transparent 1.05px),
    radial-gradient(circle at 21% 44%, rgba(255,255,255,0.34) 0 0.70px, transparent 1.35px),
    radial-gradient(circle at 28% 92%, rgba(190,225,255,0.32) 0 0.70px, transparent 1.35px),
    radial-gradient(circle at 33% 7%, rgba(255,255,255,0.24) 0 0.52px, transparent 1.05px),
    radial-gradient(circle at 39% 82%, rgba(255,255,255,0.28) 0 0.58px, transparent 1.15px),
    radial-gradient(circle at 47% 70%, rgba(255,255,255,0.36) 0 0.72px, transparent 1.4px),
    radial-gradient(circle at 54% 46%, rgba(190,225,255,0.23) 0 0.50px, transparent 1.00px),
    radial-gradient(circle at 66% 89%, rgba(255,255,255,0.27) 0 0.56px, transparent 1.12px),
    radial-gradient(circle at 75% 8%, rgba(255,255,255,0.32) 0 0.68px, transparent 1.3px),
    radial-gradient(circle at 79% 44%, rgba(255,255,255,0.25) 0 0.54px, transparent 1.08px),
    radial-gradient(circle at 88% 76%, rgba(190,225,255,0.34) 0 0.72px, transparent 1.4px),
    radial-gradient(circle at 94% 18%, rgba(255,255,255,0.24) 0 0.52px, transparent 1.05px),
    radial-gradient(circle at 2% 38%, rgba(255,255,255,0.20) 0 0.45px, transparent 0.95px),
    radial-gradient(circle at 12% 5%, rgba(190,225,255,0.18) 0 0.42px, transparent 0.90px),
    radial-gradient(circle at 26% 53%, rgba(255,255,255,0.22) 0 0.48px, transparent 1.00px),
    radial-gradient(circle at 35% 34%, rgba(255,255,255,0.19) 0 0.42px, transparent 0.92px),
    radial-gradient(circle at 44% 91%, rgba(190,225,255,0.21) 0 0.47px, transparent 0.98px),
    radial-gradient(circle at 59% 73%, rgba(255,255,255,0.22) 0 0.48px, transparent 1.00px),
    radial-gradient(circle at 72% 28%, rgba(255,255,255,0.20) 0 0.44px, transparent 0.95px),
    radial-gradient(circle at 84% 6%, rgba(190,225,255,0.18) 0 0.42px, transparent 0.90px),
    radial-gradient(circle at 92% 83%, rgba(255,255,255,0.22) 0 0.48px, transparent 1.00px),
    radial-gradient(circle at 98% 33%, rgba(255,255,255,0.19) 0 0.42px, transparent 0.92px);
  background-size: 315px 315px;
  opacity: 0.74;
}

body::after {
  background:
    /* sparse larger-field layer, offset from the dense foreground */
    radial-gradient(circle at 7% 44%, rgba(180,220,255,0.64) 0 1.15px, transparent 2.1px),
    radial-gradient(circle at 16% 9%, rgba(255,255,255,0.46) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 23% 67%, rgba(255,255,255,0.56) 0 1.05px, transparent 1.95px),
    radial-gradient(circle at 34% 51%, rgba(180,220,255,0.48) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 41% 18%, rgba(255,255,255,0.72) 0 1.18px, transparent 2.15px),
    radial-gradient(circle at 49% 95%, rgba(255,255,255,0.40) 0 0.82px, transparent 1.55px),
    radial-gradient(circle at 58% 31%, rgba(255,255,255,0.52) 0 1.0px, transparent 1.85px),
    radial-gradient(circle at 67% 74%, rgba(180,220,255,0.58) 0 1.05px, transparent 1.95px),
    radial-gradient(circle at 76% 12%, rgba(255,255,255,0.38) 0 0.78px, transparent 1.5px),
    radial-gradient(circle at 84% 57%, rgba(255,255,255,0.62) 0 1.1px, transparent 2.0px),
    radial-gradient(circle at 87% 39%, rgba(255,255,255,0.28) 0 0.62px, transparent 1.2px),
    radial-gradient(circle at 93% 25%, rgba(180,220,255,0.42) 0 0.85px, transparent 1.6px),
    radial-gradient(circle at 97% 88%, rgba(255,255,255,0.50) 0 0.95px, transparent 1.8px),
    radial-gradient(circle at 3% 82%, rgba(255,255,255,0.24) 0 0.55px, transparent 1.05px),
    radial-gradient(circle at 27% 23%, rgba(180,220,255,0.25) 0 0.55px, transparent 1.05px),
    radial-gradient(circle at 53% 67%, rgba(255,255,255,0.26) 0 0.58px, transparent 1.1px),
    radial-gradient(circle at 71% 46%, rgba(180,220,255,0.24) 0 0.55px, transparent 1.05px),
    radial-gradient(circle at 11% 61%, rgba(255,255,255,0.22) 0 0.50px, transparent 1.00px),
    radial-gradient(circle at 31% 84%, rgba(180,220,255,0.21) 0 0.50px, transparent 1.00px),
    radial-gradient(circle at 45% 8%, rgba(255,255,255,0.23) 0 0.52px, transparent 1.04px),
    radial-gradient(circle at 63% 56%, rgba(255,255,255,0.24) 0 0.54px, transparent 1.06px),
    radial-gradient(circle at 80% 87%, rgba(180,220,255,0.22) 0 0.52px, transparent 1.04px),
    radial-gradient(circle at 95% 7%, rgba(255,255,255,0.22) 0 0.50px, transparent 1.00px);
  background-size: 430px 430px;
  opacity: 0.56;
}

html[data-theme="light"] body::before,
html[data-theme="light"] body::after {
  display: none;
}

.site-header, main {
  position: relative;
  z-index: 1;
}

html[data-theme="light"] body::before,
html[data-theme="light"] body::after {
  display: none;
}

a { color: var(--link); }
a:visited { color: var(--link-visited); }
a:hover { text-decoration-thickness: 0.18em; }
a:focus, button:focus, input:focus, summary:focus, video:focus {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.site-header {
  padding: 2rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.12);
}
.header-inner, main, .site-footer {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-title {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}
.site-subtitle {
  margin: 0.7rem 0 0;
  max-width: 76ch;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
}
.navbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.25rem;
}
.navbar a, .button, button.theme-toggle, .small-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.25rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 0.25rem 1rem var(--shadow);
}
.navbar a[aria-current="page"], .button.primary {
  background: linear-gradient(135deg, rgba(88,230,166,0.28), rgba(142,230,255,0.18));
  border-color: rgba(88,230,166,0.55);
}
button.theme-toggle, .small-button { cursor: pointer; font: inherit; }
.small-button { min-height: 2rem; padding: 0.32rem 0.65rem; }

main { padding: 2rem 0 3rem; }
.hero, .panel, .callout, .table-shell, .orbit-panel {
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: clamp(1rem, 3vw, 1.6rem);
  box-shadow: 0 1rem 2.5rem var(--shadow);
}
.hero { margin-bottom: 1.5rem; }
.hero h2, .panel h2 { margin-top: 0; }
.hero-actions, .actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1rem; }
.callout { border-left: 0.35rem solid var(--accent); margin: 1rem 0; }
.warning { border-left-color: var(--accent-2); }
.timestamp { color: var(--muted); }
.lede { max-width: 78ch; font-size: 1.08rem; color: var(--muted); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.stat-card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel-2);
}
.stat-card.accent { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.stat-number { display: block; font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; letter-spacing: -0.05em; }
.stat-label { display: block; color: var(--muted); }

input[type="search"], input[type="text"], select {
  width: min(100%, 36rem);
  padding: 0.72rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}
.filterbar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 1rem 0;
}
.filterbar label { font-weight: 700; }
.result-count { color: var(--muted); }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
}
table {
  border-collapse: collapse;
  width: 100%;
}
th, td {
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
th {
  position: sticky;
  top: 0;
  background: var(--panel-2);
  z-index: 2;
  text-align: left;
}
tr[bgcolor="#033333"], tbody tr:nth-child(odd) { background: var(--table-stripe) !important; }
tr[bgcolor="#000000"] { background: var(--panel-2) !important; }
img { max-width: 100%; height: auto; }
.gallery-table img { border-radius: 0.65rem; border: 1px solid var(--border); background: var(--panel-2); }
.gallery-table td { text-align: center; }
video { max-width: 100%; border-radius: 0.8rem; border: 1px solid var(--border); background: #000; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}
.card {
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  background: var(--panel);
}
.card h3 { margin-top: 0; }

.plot-cards {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.plot-card h3 {
  margin-bottom: 0.75rem;
  white-space: nowrap;
  overflow-wrap: normal;
  font-size: clamp(0.82rem, 1.15vw, 1.05rem);
  letter-spacing: -0.01em;
}
.plot-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  align-items: start;
}
.plot-pair a {
  display: block;
  min-width: 0;
}
.plot-pair img {
  display: block;
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
@media (max-width: 760px) {
  .plot-cards { grid-template-columns: 1fr; }
}
.badge {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  margin: 0.1rem;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.9rem;
}
.badge.good { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.badge.hot { color: var(--accent-2); border-color: color-mix(in srgb, var(--accent-2) 55%, var(--border)); }

.orbit-panel { margin: 1rem 0; }
.orbit-wrap { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.8rem; }
.orbit-canvas {
  width: 100%;
  max-width: 920px;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--bg-soft);
}
.orbit-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; color: var(--muted); }

.site-footer {
  padding: 1.5rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

@media (max-width: 720px) {
  .site-header { padding-top: 1.2rem; }
  .navbar a { flex: 1 1 auto; }
  th, td { padding: 0.5rem; font-size: 0.92rem; }
}

.muted { color: var(--muted); }
pre {
  overflow-x: auto;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--bg-soft);
}
code { color: var(--text); }
dl.metadata-grid {
  display: grid;
  grid-template-columns: minmax(9rem, 0.35fr) minmax(0, 1fr);
  gap: 0.6rem 1rem;
}
dl.metadata-grid dt { font-weight: 800; color: var(--text); }
dl.metadata-grid dd { margin: 0; color: var(--muted); }
@media (max-width: 720px) {
  dl.metadata-grid { grid-template-columns: 1fr; }
}

.sortable th {
  cursor: pointer;
  user-select: none;
  position: sticky;
  top: 0;
  z-index: 2;
}
.sortable th.sort-asc::after { content: "  ▲"; font-size: .8em; color: var(--accent); }
.sortable th.sort-desc::after { content: "  ▼"; font-size: .8em; color: var(--accent); }
.gallery-table img { max-width: 100px; height: auto; border-radius: .35rem; }

/* v9: keep large table headers visible during long vertical scrolls. */
.table-scroll {
  overflow-x: auto;
  overflow-y: visible;
}
.table-scroll thead th {
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 0 var(--border), 0 0.4rem 0.8rem var(--shadow);
}
.floating-table-head {
  position: fixed;
  top: 0;
  z-index: 1000;
  display: none;
  pointer-events: auto;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 0 0 0.8rem 0.8rem;
  box-shadow: 0 0.75rem 1.5rem var(--shadow);
  background: var(--panel-2);
}
.floating-table-head table {
  table-layout: fixed;
  border-collapse: collapse;
  margin: 0;
}
.floating-table-head th {
  position: static;
  white-space: nowrap;
  cursor: pointer;
}
.gallery-table {
  min-width: 1050px;
}
.gallery-table th,
.gallery-table td {
  text-align: center;
}
.gallery-table td:first-child,
.gallery-table th:first-child {
  text-align: left;
  min-width: 11rem;
}
.gallery-table img {
  max-height: 82px;
  width: auto;
}
.dark-thumb img {
  background: #000;
}
.light-thumb img {
  background: #fff;
}
.sortable th {
  cursor: pointer;
  user-select: none;
}
.sortable th.sort-asc::after { content: " ▲"; color: var(--accent); }
.sortable th.sort-desc::after { content: " ▼"; color: var(--accent); }

/* Front-page planet showcase restored from the original landing page. */
.planet-showcase {
  background: #000;
  color: #fff;
  border-color: rgba(255,255,255,0.22);
}
.planet-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: center;
}
.planet-row figure { margin: 0; }
.planet-row img {
  display: block;
  width: 100%;
  border-radius: 0.4rem;
  background: #000;
}
.planet-showcase blockquote {
  max-width: 52rem;
  margin: 1.2rem auto 0;
  text-align: center;
  color: #fff;
}
.legacy-content font[color="#FFF00"],
.legacy-content font[color="#FFFF00"] {
  color: var(--text) !important;
}
@media (max-width: 780px) {
  .planet-row { grid-template-columns: 1fr; }
}