:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1016; --paper: #111821; --paper-soft: #161f29; --ink: #e8eef4;
  --muted: #9ba9b7; --faint: #697a8b; --accent: #79add8; --accent-soft: rgba(121, 173, 216, .13);
  --line: rgba(210, 226, 239, .09); --line-strong: rgba(210, 226, 239, .15);
}
:root[data-theme="dark"] body { background: radial-gradient(circle at 18% 0%, rgba(60, 93, 122, .18), transparent 34%), #0b1016 !important; }
:root[data-theme="dark"] body::before,
:root[data-theme="dark"] body::after { display: none !important; }
:root[data-theme="dark"] .topbar,
:root[data-theme="dark"] .profile-card,
:root[data-theme="dark"] .directory { background: rgba(15, 22, 30, .96) !important; border-color: var(--line) !important; }
:root[data-theme="dark"] .profile-cover { background: linear-gradient(135deg, #172838, #121c26 58%, #151b23) !important; }
:root[data-theme="dark"] .social-link { background: #141c25 !important; border-color: var(--line) !important; color: var(--ink) !important; }
:root[data-theme="dark"] .social-link:hover { background: #18232e !important; }
:root[data-theme="dark"] .avatar-fallback,
:root[data-theme="dark"] .brand-mark { background: linear-gradient(135deg, #294862, #1c2d3d) !important; color: #dceaf5 !important; }
:root[data-theme="dark"] .icon-button,
:root[data-theme="dark"] .text-action { background: #111821 !important; border-color: var(--line-strong) !important; color: var(--ink) !important; }