:root{
  --theme-border: #2b00ff;
  --theme-accent: #a10b63;
  --theme-bg: #f4f6fb;
  --theme-card-bg: #ffffff;
}

/* Theme: Classic (افتراضي) */
body.theme-classic{
  background: var(--theme-bg);
}

/* Theme: Modern */
body.theme-modern{
  --theme-border: #0ea5e9;
  --theme-accent: #0f172a;
  --theme-bg: #0b1220;
  --theme-card-bg: #0f172a;
  color: #e5e7eb;
  background: radial-gradient(1200px 600px at 50% -10%, rgba(14,165,233,.20), transparent 60%),
              radial-gradient(900px 400px at 10% 0%, rgba(168,85,247,.18), transparent 55%),
              var(--theme-bg);
}
body.theme-modern .card,
body.theme-modern .navbar-wdm{
  background: rgba(255,255,255,.06) !important;
  border-color: rgba(255,255,255,.12) !important;
}
body.theme-modern .nav-link,
body.theme-modern .navbar-brand{
  color: #e5e7eb !important;
}

/* Theme: Minimal */
body.theme-minimal{
  --theme-border: #111827;
  --theme-accent: #111827;
  --theme-bg: #ffffff;
  --theme-card-bg: #ffffff;
  background: #ffffff;
}
body.theme-minimal .navbar-wdm{
  background: #ffffff !important;
}

/* Apply theme variables where reasonable (UI only; card design stays legacy) */
.navbar-wdm .brand-badge{ border-color: var(--theme-border) !important; }
.btn-primary{ background-color: var(--theme-accent); border-color: var(--theme-accent); }
.btn-primary:hover{ filter: brightness(.95); }