/* ==========================================================================
   Layout System - Wholesum Design System
   Flexbox, grid, containers, positioning, directional spacing utilities.
   Version: 1.0 | Phase 5 of CSS Unification

   NOTE: Basic p-*, m-*, gap-* utilities are in utilities.css.
         This file adds directional spacing, flex/grid, containers, etc.
   ========================================================================== */

/* ===== FLEXBOX UTILITIES ===== */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-end {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.self-start { align-self: flex-start; }
.self-center { align-self: center; }
.self-end { align-self: flex-end; }


/* ===== GRID UTILITIES ===== */
.grid { display: grid; }

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }


/* ===== DIRECTIONAL MARGIN UTILITIES ===== */
/* (m-0 through m-8 are in utilities.css — this extends with directional) */

/* margin-top */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-10 { margin-top: var(--spacing-10); }
.mt-12 { margin-top: var(--spacing-12); }

/* margin-bottom */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

/* margin-left / margin-right */
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.ml-2 { margin-left: var(--spacing-2); }
.ml-4 { margin-left: var(--spacing-4); }
.mr-2 { margin-right: var(--spacing-2); }
.mr-4 { margin-right: var(--spacing-4); }


/* ===== DIRECTIONAL PADDING UTILITIES ===== */
/* (p-0 through p-8 are in utilities.css — this extends with directional) */

/* padding-top */
.pt-0 { padding-top: 0; }
.pt-2 { padding-top: var(--spacing-2); }
.pt-4 { padding-top: var(--spacing-4); }
.pt-6 { padding-top: var(--spacing-6); }
.pt-8 { padding-top: var(--spacing-8); }
.pt-16 { padding-top: var(--spacing-16); }

/* padding-bottom */
.pb-0 { padding-bottom: 0; }
.pb-2 { padding-bottom: var(--spacing-2); }
.pb-4 { padding-bottom: var(--spacing-4); }
.pb-6 { padding-bottom: var(--spacing-6); }
.pb-8 { padding-bottom: var(--spacing-8); }
.pb-12 { padding-bottom: var(--spacing-12); }
.pb-16 { padding-bottom: var(--spacing-16); }

/* padding-left / padding-right */
.pl-2 { padding-left: var(--spacing-2); }
.pl-4 { padding-left: var(--spacing-4); }
.pl-6 { padding-left: var(--spacing-6); }
.pl-8 { padding-left: var(--spacing-8); }

.pr-2 { padding-right: var(--spacing-2); }
.pr-4 { padding-right: var(--spacing-4); }
.pr-6 { padding-right: var(--spacing-6); }
.pr-8 { padding-right: var(--spacing-8); }

/* padding-x / padding-y */
.px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }
.px-8 { padding-left: var(--spacing-8); padding-right: var(--spacing-8); }

.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-6 { padding-top: var(--spacing-6); padding-bottom: var(--spacing-6); }
.py-8 { padding-top: var(--spacing-8); padding-bottom: var(--spacing-8); }

/* gap extensions (gap-2/4/6/8 in utilities.css) */
.gap-0 { gap: 0; }
.gap-1 { gap: var(--spacing-1); }
.gap-3 { gap: var(--spacing-3); }
.gap-5 { gap: var(--spacing-5); }
.gap-10 { gap: var(--spacing-10); }


/* ===== CONTAINER CLASSES ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 960px; }
.container-lg { max-width: 1200px; }

/* Page container — the 900px centered content pattern used on most pages */
.container-page {
  flex: 1;
  width: 100%;
  max-width: var(--page-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-8);
  padding-right: var(--spacing-8);
}

@media (max-width: 640px) {
  .container {
    padding-left: var(--spacing-2);
    padding-right: var(--spacing-2);
  }
  .container-page {
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
  }
}


/* ===== WIDTH & HEIGHT UTILITIES ===== */
.w-full { width: 100%; }
.w-screen { width: 100vw; }
.w-auto { width: auto; }
.w-fit { width: fit-content; }
.min-w-0 { min-width: 0; }

.h-full { height: 100%; }
.h-screen { height: 100vh; }
.h-auto { height: auto; }
.min-h-screen { min-height: 100vh; }


/* ===== DISPLAY UTILITIES ===== */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }


/* ===== OVERFLOW UTILITIES ===== */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }


/* ===== POSITIONING ===== */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

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


/* ===== Z-INDEX UTILITIES ===== */
.z-footer { z-index: var(--z-footer); }
.z-overlay { z-index: var(--z-overlay); }
.z-dropdown { z-index: var(--z-dropdown); }
.z-menu { z-index: var(--z-menu); }
.z-modal { z-index: var(--z-modal); }


/* ===== RESPONSIVE UTILITIES ===== */
/* Breakpoint tiers (see design-tokens.css for reference):
   md\:*  — tablet  (max-width: 768px)
   mob\:* — mobile  (max-width: 640px)
   sm\:*  — small   (max-width: 480px)
*/

/* ── Tablet: 768px ── */
@media (max-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:flex-col { flex-direction: column; }
  .md\:w-full { width: 100%; }
  .md\:grid-cols-1 { grid-template-columns: 1fr; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:gap-4 { gap: var(--spacing-4); }
  .md\:gap-3 { gap: var(--spacing-3); }
  .md\:p-4 { padding: var(--spacing-4); }
}

/* ── Mobile: 640px ── */
@media (max-width: 640px) {
  .mob\:hidden { display: none; }
  .mob\:block { display: block; }
  .mob\:flex { display: flex; }
  .mob\:flex-col { flex-direction: column; }
  .mob\:w-full { width: 100%; }
  .mob\:grid-cols-1 { grid-template-columns: 1fr; }
  .mob\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mob\:gap-2 { gap: var(--spacing-2); }
  .mob\:gap-3 { gap: var(--spacing-3); }
  .mob\:p-2 { padding: var(--spacing-2); }
  .mob\:p-4 { padding: var(--spacing-4); }
  .mob\:text-sm { font-size: var(--font-size-sm); }
}

/* ── Small mobile: 480px ── */
@media (max-width: 480px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:w-full { width: 100%; }
  .sm\:grid-cols-1 { grid-template-columns: 1fr; }
  .sm\:gap-2 { gap: var(--spacing-2); }
  .sm\:p-2 { padding: var(--spacing-2); }
}