/**
 * AquaFlow — Layout utilities, spacing, flex/grid helpers
 */

/* Containers */
.wrap {
  width: 100%;
  padding-inline: var(--space-4);
  margin-inline: auto;
}

.wrap-narrow {
  width: 100%;
  padding-inline: var(--space-4);
  margin-inline: auto;
}

/* Flex */
.af-flex { display: flex; }
.af-flex-col { flex-direction: column; }
.af-items-center { align-items: center; }
.af-items-start { align-items: flex-start; }
.af-justify-between { justify-content: space-between; }
.af-justify-center { justify-content: center; }
.af-gap-1 { gap: var(--space-1); }
.af-gap-2 { gap: var(--space-2); }
.af-gap-3 { gap: var(--space-3); }
.af-gap-4 { gap: var(--space-4); }
.af-gap-6 { gap: var(--space-6); }
.af-flex-wrap { flex-wrap: wrap; }
.af-flex-1 { flex: 1; }

/* Grid */
.af-grid { display: grid; }
.af-grid-2 { grid-template-columns: repeat(2, 1fr); }
.af-grid-3 { grid-template-columns: repeat(3, 1fr); }
.af-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Spacing */
.af-m-0 { margin: 0; }
.af-mt-2 { margin-top: var(--space-2); }
.af-mt-4 { margin-top: var(--space-4); }
.af-mt-6 { margin-top: var(--space-6); }
.af-mb-2 { margin-bottom: var(--space-2); }
.af-mb-4 { margin-bottom: var(--space-4); }
.af-mb-6 { margin-bottom: var(--space-6); }
.af-p-4 { padding: var(--space-4); }
.af-p-6 { padding: var(--space-6); }
.af-py-section { padding-block: clamp(48px, 8vw, 96px); }

/* Text */
.text-muted { color: var(--muted); }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-brand { color: var(--primary-dark); }
.text-water { color: var(--secondary-dark); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.w-full { width: 100%; }

.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;
}

/* Showcase shell (ui-kit docs only) */
.af-kit-body {
  background: var(--bg);
  min-height: 100vh;
}

.af-kit-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.af-kit-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  max-width: var(--container);
  margin-inline: auto;
}

.af-kit-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--text-sm);
}

.af-kit-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, var(--secondary), var(--secondary-dark));
  color: #fff;
  display: grid;
  place-items: center;
}

.af-kit-nav {
  display: none;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.af-kit-nav a {
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--muted);
  transition: background var(--duration), color var(--duration);
}

.af-kit-nav a:hover,
.af-kit-nav a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.af-kit-main {
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
}

.af-kit-section {
  margin-bottom: var(--space-10);
}

.af-kit-section h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.af-kit-section > p {
  color: var(--muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.af-kit-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-3);
}

.af-kit-swatch {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.af-kit-swatch-color {
  height: 64px;
}

.af-kit-swatch-meta {
  padding: var(--space-2) var(--space-3);
  font-size: 11px;
  font-weight: 700;
}

.af-kit-swatch-meta code {
  display: block;
  color: var(--muted);
  font-weight: 600;
  margin-top: 2px;
}

.af-kit-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.af-kit-demo-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.af-kit-menu-btn {
  display: flex;
  background: var(--surface-2);
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  color: var(--ink);
}

@media (min-width: 768px) {
  .af-kit-nav { display: flex; }
  .af-kit-menu-btn { display: none; }
}

@media (min-width: 640px) {
  .wrap, .wrap-narrow { padding-inline: var(--space-6); }
}

@media (min-width: 1024px) {
  .wrap { max-width: var(--container); }
  .wrap-narrow { max-width: var(--container-narrow); }
}