/**
 * utilities.css
 * -----------------------------------------------------------------------------
 * Single-purpose helper classes. Composable, low-specificity.
 * ----------------------------------------------------------------------------- */

/* ===== Display ===== */
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none !important; }
.invisible { visibility: hidden; }

/* ===== Position ===== */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.static { position: static; }

.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }
.inset-0 { inset: 0; }

/* ===== Z-index ===== */
.z-0 { z-index: 0; }
.z-10 { z-index: var(--z-raised); }
.z-50 { z-index: var(--z-sticky); }
.z-100 { z-index: var(--z-dropdown); }

/* ===== Width / Height ===== */
.w-full { width: 100%; }
.w-auto { width: auto; }
.h-full { height: 100%; }
.h-screen { height: 100vh; height: 100dvh; }
.min-h-screen { min-height: 100vh; min-height: 100dvh; }

/* ===== Margin ===== */
.m-0 { margin: 0; }
.mx-auto { margin-inline: auto; }
.my-4 { margin-block: var(--space-4); }
.my-6 { margin-block: var(--space-6); }
.my-8 { margin-block: var(--space-8); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* ===== Padding ===== */
.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.px-4 { padding-inline: var(--space-4); }
.px-6 { padding-inline: var(--space-6); }
.py-4 { padding-block: var(--space-4); }
.py-6 { padding-block: var(--space-6); }
.py-8 { padding-block: var(--space-8); }

/* ===== Background ===== */
.bg-primary    { background: var(--color-bg-primary); }
.bg-secondary  { background: var(--color-bg-secondary); }
.bg-card       { background: var(--color-bg-card); }
.bg-elevated   { background: var(--color-bg-elevated); }
.bg-accent     { background: var(--color-accent); }
.bg-glass      { background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); }

/* ===== Border ===== */
.border { border: 1px solid var(--color-border); }
.border-strong { border: 1px solid var(--color-border-strong); }
.border-top { border-top: 1px solid var(--color-border); }
.border-bottom { border-bottom: 1px solid var(--color-border); }
.border-accent { border: 1px solid var(--color-accent); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* ===== Shadow ===== */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-glow { box-shadow: var(--shadow-glow); }

/* ===== Overflow ===== */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* ===== Cursor ===== */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-none { cursor: none; }

/* ===== Pointer events ===== */
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

/* ===== User select ===== */
.select-none { user-select: none; }

/* ===== Transitions ===== */
.transition { transition: all var(--duration-base) var(--ease-out); }
.transition-colors { transition: color var(--duration-fast), background var(--duration-fast), border-color var(--duration-fast); }
.transition-transform { transition: transform var(--duration-base) var(--ease-out); }

/* ===== Misc ===== */
.no-scroll { overflow: hidden !important; }
.text-clip {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Aspect ratio ===== */
.aspect-video { aspect-ratio: 16 / 9; }
.aspect-square { aspect-ratio: 1 / 1; }

/* ===== Object fit ===== */
.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }

/* ===== Backdrop blur ===== */
.backdrop-blur {
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

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