/* Shared time-based colors. Content and URLs remain the same in both themes. */
html[data-theme="light"] { color-scheme: light; }
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07111f;
  --bg-soft: #0c1830;
  --panel: rgba(255,255,255,0.06);
  --panel-strong: rgba(255,255,255,0.09);
  --line: rgba(255,255,255,0.12);
  --text: #edf4ff;
  --muted: #a8b7cf;
  --accent: #7dd3fc;
  --accent-2: #93c5fd;
  --accent-3: #a78bfa;
  --shadow: 0 18px 60px rgba(0,0,0,0.35);
}
html[data-theme="dark"] body {
  background: radial-gradient(circle at 20% 10%, rgba(125,211,252,0.12), transparent 35%),
    linear-gradient(180deg, #06101d, #091527 48%, #07111f);
}
html[data-theme="dark"] .site-header {
  background: rgba(7,17,31,0.94);
  border-color: var(--line);
}
html[data-theme="dark"] a { color: var(--accent-2) !important; }
html[data-theme="dark"] .hero .gradient {
  background-image: linear-gradient(90deg, #7dd3fc, #c4b5fd);
}
html[data-theme="dark"] .btn,
html[data-theme="dark"] .btn-primary,
html[data-theme="dark"] .btn-secondary {
  background: #17304c;
  border: 1px solid var(--line);
}
html[data-theme="dark"] .btn:hover,
html[data-theme="dark"] .btn:focus { background: #22486b; }
html[data-theme="dark"] .paper-card { background: var(--bg-soft); }
html[data-theme="dark"] .paper-figure span { background: #14243c; }
html[data-theme="dark"] .paper-status { background: #15334e; color: var(--accent); }
html[data-theme="dark"] .latest-update .pub-link { color: var(--muted) !important; }
html[data-theme="dark"] .latest-update .pub-link[href="#papers"] { color: var(--accent) !important; }
html[data-theme="dark"] .affiliations-box {
  background: #0c1830 !important;
  border-color: var(--line) !important;
  box-shadow: var(--shadow) !important;
}
html[data-theme="dark"] .affiliations-box .section-title,
html[data-theme="dark"] .affiliations-box span { color: var(--text) !important; }
@media (max-width: 820px) {
  html[data-theme="light"] .header-top,
  html[data-theme="light"] .header-bottom { background: rgba(255,255,255,0.96); }
  html[data-theme="dark"] .site-header { background: transparent; }
  html[data-theme="dark"] .header-top { background: rgba(7,17,31,0.96); }
  html[data-theme="dark"] .header-bottom { background: #101e32; }
}
html[data-theme="dark"] img[src$="DSELab_logo_00.png"] {
  background: #f7fbff;
  border-radius: 50%;
}