:root {
  color-scheme: dark;
  --color-background-primary: #0d1117;
  --color-background-secondary: #161b22;
  --color-background-success: rgba(63, 185, 80, 0.12);
  --color-background-warning: rgba(227, 179, 65, 0.14);
  --color-background-info: rgba(88, 166, 255, 0.12);
  --color-text-primary: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-success: #3fb950;
  --color-text-warning: #e3b341;
  --color-text-info: #58a6ff;
  --color-text-danger: #ff7b72;
  --color-border-secondary: #30363d;
  --color-border-tertiary: #21262d;
  --color-border-success: rgba(63, 185, 80, 0.4);
  --color-border-warning: rgba(227, 179, 65, 0.42);
  --color-border-info: rgba(88, 166, 255, 0.42);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --border-radius-md: 10px;
  --border-radius-lg: 16px;
}

html {
  background: var(--color-background-primary);
  color: var(--color-text-primary);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(88, 166, 255, 0.1), transparent 42%),
    linear-gradient(180deg, #0d1117 0%, #11161d 100%);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
}

a {
  color: var(--color-text-info);
}

.snapshot-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.snapshot-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 1.1rem;
  padding: 0.95rem 1rem;
  background: rgba(22, 27, 34, 0.94);
  border: 1px solid var(--color-border-secondary);
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.snapshot-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(88, 166, 255, 0.35);
  background: rgba(88, 166, 255, 0.12);
  color: var(--color-text-primary);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.snapshot-back:hover {
  border-color: rgba(227, 179, 65, 0.5);
  background: rgba(227, 179, 65, 0.12);
  text-decoration: none;
}

.snapshot-meta {
  flex: 1 1 340px;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

.snapshot-badge {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-warning);
  font-weight: 800;
}

.w {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0;
}

.tab {
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.tab:hover {
  border-color: var(--color-border-info);
  color: var(--color-text-primary);
}

.ptbl {
  display: block;
  overflow-x: auto;
}

.ptbl tbody,
.ptbl thead,
.ptbl tr {
  min-width: 100%;
}

@media (max-width: 900px) {
  .snapshot-shell {
    padding: 1rem 0.8rem 2rem;
  }

  .snapshot-nav {
    align-items: flex-start;
  }

  .g2,
  .g3 {
    grid-template-columns: 1fr !important;
  }

  .irow,
  .prog-row,
  .apex-line,
  .prime-row,
  .ru-row,
  .cstep,
  .chain-row {
    flex-wrap: wrap;
  }

  .ilhs,
  .prog-label,
  .pn,
  .pidx,
  .ru-n,
  .ru-base,
  .apex-lhs,
  .apex-rhs {
    flex: 1 1 100%;
    min-width: 0 !important;
  }
}