/* === RESET === */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0;
  font-family: var(--canvas-font-body, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
  color: var(--canvas-color-text, #111827);
  background-color: var(--canvas-color-bg, #ffffff);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
html { scroll-behavior: smooth; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--canvas-font-heading, var(--canvas-font-body, system-ui, sans-serif));
}
a { color: inherit; }

/* === SKIP LINK (accessibility) === */
.canvas-skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--canvas-color-primary, #1f1f1f);
  color: #fff;
  padding: 8px 24px;
  border-radius: 0 0 var(--canvas-radius-sm, 6px) var(--canvas-radius-sm, 6px);
  z-index: 10000;
  font-size: 14px;
  text-decoration: none;
  transition: top 0.2s;
}
.canvas-skip-link:focus {
  top: 0;
}

/* === TOAST NOTIFICATIONS === */
.canvas-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--canvas-color-primary, #1f1f1f);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--canvas-radius-md, 10px);
  font-size: 14px;
  font-weight: 500;
  z-index: 10000;
  pointer-events: none;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  max-width: 90vw;
  text-align: center;
  box-shadow: var(--canvas-shadow-lg);
}
.canvas-toast.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.canvas-toast--success { background: var(--canvas-color-success, #16a34a); }
.canvas-toast--error { background: var(--canvas-color-error, #dc2626); }

/* === RESPONSIVE UTILITIES === */
@media (max-width: 767px) {
  .canvas-hide-mobile { display: none !important; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .canvas-hide-tablet { display: none !important; }
}
@media (min-width: 1024px) {
  .canvas-hide-desktop { display: none !important; }
}
@media (max-width: 1023px) {
  .canvas-hide-below-desktop { display: none !important; }
}
@media (min-width: 768px) {
  .canvas-hide-above-mobile { display: none !important; }
}