:root {
  --bg: #0f172a;
  --surface: #111827;
  --surface-soft: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --link: #93c5fd;
  --link-hover: #bfdbfe;
  --nav-bg: #020617;
  --border: #334155;
  --btn-bg: #2563eb;
  --btn-border: #2563eb;
  --btn-text: #ffffff;
  --icon-strip-bg: rgba(255, 255, 255, 0.16);
}

html[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --link: #1d4ed8;
  --link-hover: #1e40af;
  --nav-bg: #0f172a;
  --border: #cbd5e1;
  --btn-bg: #2563eb;
  --btn-border: #2563eb;
  --btn-text: #ffffff;
  --icon-strip-bg: rgba(15, 23, 42, 0.06);
}

body {
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--link);
}

a:hover {
  color: var(--link-hover);
}

.navbar.bg-dark {
  background-color: var(--nav-bg) !important;
}

.card,
.row,
.bg,
footer {
  background: var(--surface);
  border-color: var(--border);
}

hr {
  border-color: var(--border);
}

.footer-text {
  color: var(--muted);
}

.theme-toggle {
  border-color: #94a3b8;
  color: #e2e8f0;
}

.theme-toggle:hover,
.theme-toggle:focus {
  background: #1e293b;
  color: #ffffff;
}

.icon-strip {
  background: var(--icon-strip-bg);
}

html[data-theme="light"] .theme-toggle {
  border-color: #cbd5e1;
  color: #e2e8f0;
}

html[data-theme="light"] .theme-toggle:hover,
html[data-theme="light"] .theme-toggle:focus {
  background: #334155;
}