/* ==========================================================================
   GLOBAL RESET & BASE LAYOUT
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

img, picture, video, svg { display: block; max-width: 100%; height: auto; }

body {
  background: var(--color-background);
  overflow-x: hidden;
}

body.menu-open { overflow: hidden; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

section { position: relative; }

.section-pad { padding-block: var(--space-9); }
.section-pad-lg { padding-block: var(--space-10); }
.section-pad-sm { padding-block: var(--space-7); }

.bg-alt { background: var(--color-background-alt); }
.bg-dark { background: var(--color-surface-dark); }

.grid { display: grid; gap: var(--space-4); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.divider {
  height: 1px;
  background: var(--color-border);
  border: 0;
}

/* visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* skip link */
.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-3);
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  z-index: 200;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-3); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* hide scrollbar but keep scrollable */
.no-scrollbar { scrollbar-width: none; -ms-overflow-style: none; }
.no-scrollbar::-webkit-scrollbar { display: none; }

/* skeleton loader */
.skeleton {
  position: relative;
  background: var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.skeleton::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
  animation: skeleton-shimmer 1.4s infinite;
}
@keyframes skeleton-shimmer {
  100% { transform: translateX(100%); }
  0% { transform: translateX(-100%); }
}