SASS Mixins

// Define a mixin
@mixin flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

// Mixin with arguments
@mixin button($bg, $color: white, $size: 1rem) {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5em 1.25em;
  background: $bg;
  color: $color;
  font-size: $size;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s;

  &:hover { opacity: 0.85; }
}

// Responsive mixin
@mixin respond-to($breakpoint) {
  @if $breakpoint == 'md' {
    @media (min-width: 768px) { @content; }
  } @else if $breakpoint == 'lg' {
    @media (min-width: 1024px) { @content; }
  }
}

// Using mixins
.hero        { @include flex-center; min-height: 100vh; }
.btn-primary { @include button(#6366f1); }
.btn-danger  { @include button(#ef4444); }

.container {
  width: 100%;
  @include respond-to('md') { max-width: 768px; }
  @include respond-to('lg') { max-width: 1024px; }
}