/**
 * Erewhon Layout System
 * ACSS Section/Container Pattern + Composition Primitives
 * Kevin Geary Philosophy
 * 
 * Philosophy:
 * - Section handles full-width + gutter + vertical rhythm
 * - Container constrains width + centers
 * - Layout utilities for composition (stack, cluster, grid patterns)
 * 
 * @package Erewhon
 * @version 2.0
 */

/* ============================================
   SITE WRAPPER
   Optional outer container for 1920px constraint
   ============================================ */

.site-wrapper {
  max-width: var(--site-max-width); /* 1920px */
  margin-inline: auto;
  background: var(--bg-canvas);
}

/* ============================================
   SECTION SYSTEM
   Full-width container with gutter + vertical rhythm
   
   Pattern: <section class="section-lg">
   ============================================ */

/* ============================================
   SECTION SYSTEM
   Smart section pattern with nested protection
   
   Usage: <section class="site-section">
   Gap: Only between multiple containers (var(--container-gap))
   ============================================ */

:where(section.site-section:not(section section)) {
  padding-block: var(--section-padding-block, var(--section-space-md));
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--section-gap, var(--container-gap));  /* Only between containers */
}

/* Size Variants - Override --section-padding-block */
.site-section-xs {
  --section-padding-block: var(--section-space-xs);  /* 32-56px */
}

.site-section-sm {
  --section-padding-block: var(--section-space-sm);  /* 48-72px */
}

.site-section-md {
  --section-padding-block: var(--section-space-md);  /* 64-112px */
}

.site-section-lg {
  --section-padding-block: var(--section-space-lg);  /* 96-160px */
}

.site-section-xl {
  --section-padding-block: var(--section-space-xl);  /* 128-224px */
}

.site-section-2xl {
  --section-padding-block: var(--section-space-2xl); /* 160-288px */
}

/* Gap Variants - Override --section-gap */
.site-section-gap-xs {
  --section-gap: var(--space-xs);
}

.site-section-gap-sm {
  --section-gap: var(--space-sm);
}

.site-section-gap-md {
  --section-gap: var(--space-md);
}

.site-section-gap-lg {
  --section-gap: var(--space-lg);
}

.site-section-gap-xl {
  --section-gap: var(--space-xl);
}

/* Keep old class names for backwards compatibility */
.section {
  padding-block: var(--section-space-md);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);  /* Gap between containers */
}

.section-xs { 
  padding-block: var(--section-space-xs);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

.section-sm { 
  padding-block: var(--section-space-sm);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

.section-md { 
  padding-block: var(--section-space-md);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

.section-lg { 
  padding-block: var(--section-space-lg);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

.section-xl { 
  padding-block: var(--section-space-xl);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

.section-2xl { 
  padding-block: var(--section-space-2xl);
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: var(--container-gap);
}

/* Padding Modifiers */
.site-section-no-padding,
.section-no-padding {
  padding: 0;
}

.site-section-no-padding-block,
.section-no-padding-block {
  padding-block: 0;
}

.site-section-no-padding-top,
.section-no-padding-top {
  padding-block-start: 0;
}

.site-section-no-padding-bottom,
.section-no-padding-bottom {
  padding-block-end: 0;
}

.site-section-no-gutter,
.section-no-gutter {
  padding-inline: 0;
}

.site-section-no-gap,
.section-no-gap {
  gap: 0;
}

/* Background Variants */
.site-section-bg-surface,
.section-bg-surface {
  background-color: var(--bg-surface);
}

.site-section-bg-muted,
.section-bg-muted {
  background-color: var(--bg-muted);
}

.site-section-bg-primary,
.section-bg-primary {
  background-color: var(--primary);
  color: var(--text-on-primary);
}

.site-section-bg-primary-light,
.section-bg-primary-light {
  background-color: var(--primary-ultra-light);
}

.site-section-bg-secondary,
.section-bg-secondary {
  background-color: var(--secondary);
  color: var(--text-on-secondary);
}

.site-section-bg-secondary-light,
.section-bg-secondary-light {
  background-color: var(--secondary-ultra-light);
}

/* Gradient Backgrounds */
.site-section-bg-gradient-primary,
.section-bg-gradient-primary {
  background: var(--gradient-primary);
  color: var(--text-on-primary);
}

.site-section-bg-gradient-trust,
.section-bg-gradient-trust {
  background: var(--gradient-trust);
  color: var(--text-on-primary);
}

.site-section-bg-gradient-health,
.section-bg-gradient-health {
  background: var(--gradient-health);
  color: var(--text-on-primary);
}

.site-section-bg-gradient-care,
.section-bg-gradient-care {
  background: var(--gradient-care);
  color: var(--text-on-primary);
}

/* Overlay Pattern */
.site-section-overlay,
.section-overlay {
  position: relative;
}

.site-section-overlay::before,
.section-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 1;
  pointer-events: none;
}

.site-section-overlay > *,
.section-overlay > * {
  position: relative;
  z-index: 2;
}

/* Mesh Background */
.site-section-bg-mesh,
.section-bg-mesh {
  background: var(--bg-canvas);
  position: relative;
}

.site-section-bg-mesh::before,
.section-bg-mesh::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  opacity: 1;
  pointer-events: none;
}

.site-section-bg-mesh > *,
.section-bg-mesh > * {
  position: relative;
  z-index: 1;
}

/* ============================================
   CONTAINER SYSTEM
   Content width constraint (lives inside section)
   
   Pattern: <div class="container">
   Gap: Between direct children (var(--content-gap))
   ============================================ */

.container {
  width: 100%;
  max-width: var(--content-width);  /* 1366px */
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));  /* Default: content-gap */
  /* NO padding-inline - section provides gutter! */
}

/* Width Variants */
.container-narrow {
  width: 100%;
  max-width: var(--content-width-narrow);  /* 960px */
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));
}

.container-text {
  width: 100%;
  max-width: var(--content-width-text);  /* 768px */
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));
}

.container-prose {
  width: 100%;
  max-width: var(--content-width-prose);  /* 672px */
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));
}

.container-wide {
  width: 100%;
  max-width: var(--content-width-wide);  /* 1600px */
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));
}

.container-full {
  width: 100%;
  max-width: none;
  display: flex;
  flex-direction: column;
  gap: var(--container-gap-override, var(--content-gap));
}

/* Container Gap Modifiers */
.container-gap-xs {
  --container-gap-override: var(--space-xs);
}

.container-gap-sm {
  --container-gap-override: var(--space-sm);
}

.container-gap-md {
  --container-gap-override: var(--space-md);
}

.container-gap-lg {
  --container-gap-override: var(--space-lg);
}

.container-gap-xl {
  --container-gap-override: var(--space-xl);
}

.container-no-gap {
  --container-gap-override: 0;
}

/* ============================================
   CONTAINER GRID
   Two-column layouts with sidebar
   ============================================ */

.container-grid {
  max-width: var(--content-width);
  margin-inline: auto;
  width: 100%;
  
  display: grid;
  gap: var(--grid-gap-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 64rem) {
  .container-grid {
    grid-template-columns: 1fr 350px;
  }
  
  .container-grid-reverse {
    grid-template-columns: 350px 1fr;
  }
  
  .container-grid-sidebar-narrow {
    grid-template-columns: 1fr 280px;
  }
  
  .container-grid-sidebar-wide {
    grid-template-columns: 1fr 400px;
  }
}

/* ============================================
   STACK
   Vertical composition with consistent gap
   ============================================ */

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.stack-xs {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.stack-md {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.stack-lg {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.stack-xl {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.stack-2xl {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

/* Semantic stack variants */
.stack-content {
  display: flex;
  flex-direction: column;
  gap: var(--content-gap);
}

.stack-section {
  display: flex;
  flex-direction: column;
  gap: var(--gap-section-section);
}

/* ============================================
   CLUSTER
   Inline/horizontal composition with wrapping
   ============================================ */

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--inline-gap);
  align-items: center;
}

.cluster-xs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

.cluster-sm {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.cluster-md {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.cluster-lg {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
}

/* Alignment variants */
.cluster-start {
  justify-content: flex-start;
}

.cluster-center {
  justify-content: center;
}

.cluster-end {
  justify-content: flex-end;
}

.cluster-between {
  justify-content: space-between;
}

/* ============================================
   SEMANTIC GRID LAYOUTS
   Purpose-driven grid patterns
   ============================================ */

/* Base grid with gap control */
.grid-layout {
  display: grid;
  gap: var(--grid-gap-md);
  width: 100%;
}

.grid-layout-sm {
  display: grid;
  gap: var(--grid-gap-sm);
  width: 100%;
}

.grid-layout-lg {
  display: grid;
  gap: var(--grid-gap-lg);
  width: 100%;
}

.grid-layout-xl {
  display: grid;
  gap: var(--grid-gap-xl);
  width: 100%;
}

/* Auto-fit responsive grids */
.grid-auto-sm {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  gap: var(--grid-gap-md);
  width: 100%;
}

.grid-auto-md {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(20rem, 100%), 1fr));
  gap: var(--grid-gap-md);
  width: 100%;
}

.grid-auto-lg {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(25rem, 100%), 1fr));
  gap: var(--grid-gap-lg);
  width: 100%;
}

.grid-auto-xl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(30rem, 100%), 1fr));
  gap: var(--grid-gap-lg);
  width: 100%;
}

/* Doctor Grid - 2 columns max */
.grid-doctors {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-xl);
  width: 100%;
}

@media (min-width: 64rem) {
  .grid-doctors {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Hospital Grid - Max 2 columns responsive */
.grid-hospitals {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-lg);
  width: 100%;
}

@media (min-width: 48rem) {
  .grid-hospitals {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Treatment Grid - 1-3 columns responsive */
.grid-treatments {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-lg);
  width: 100%;
}

@media (min-width: 36rem) {
  .grid-treatments {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 64rem) {
  .grid-treatments {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Feature Grid - 2-4 columns */
.grid-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-lg);
  width: 100%;
}

@media (min-width: 36rem) {
  .grid-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 64rem) {
  .grid-features {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Blog Grid - 1-3 columns */
.grid-blog {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-lg);
  width: 100%;
}

@media (min-width: 48rem) {
  .grid-blog {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 75rem) {
  .grid-blog {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   SIDEBAR LAYOUT
   Main content + sidebar pattern
   ============================================ */

.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap-xl);
  width: 100%;
}

@media (min-width: 64rem) {
  .sidebar-layout {
    grid-template-columns: 1fr 280px;
    gap: var(--grid-gap-xl);
  }
  
  .sidebar-layout-wide {
    grid-template-columns: 1fr 350px;
  }
  
  .sidebar-layout-reverse {
    grid-template-columns: 280px 1fr;
  }
  
  .sidebar-layout-wide.sidebar-layout-reverse {
    grid-template-columns: 350px 1fr;
  }
}

/* ============================================
   FLOW
   Generic vertical spacing utility
   ============================================ */

.flow > * + * {
  margin-top: var(--space-md);
}

.flow-sm > * + * {
  margin-top: var(--space-sm);
}

.flow-lg > * + * {
  margin-top: var(--space-lg);
}

/* Content flow with semantic gap */
.flow-content > * + * {
  margin-top: var(--content-gap);
}

/* ============================================
   CENTER
   Horizontal centering utility
   ============================================ */

.center {
  box-sizing: content-box;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.center-text {
  max-width: var(--content-width-text);
}

.center-prose {
  max-width: var(--content-width-prose);
}

/* ============================================
   SWITCHER
   Responsive layout that switches at breakpoint
   ============================================ */

.switcher {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.switcher > * {
  flex-grow: 1;
  flex-basis: calc((30rem - 100%) * 999);
}

/* ============================================
   COVER
   Full-height centered content
   ============================================ */

.cover {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-lg);
}

.cover > * {
  margin-block: var(--space-md);
}

.cover > :first-child:not(.cover-center) {
  margin-block-start: 0;
}

.cover > :last-child:not(.cover-center) {
  margin-block-end: 0;
}

.cover > .cover-center {
  margin-block: auto;
}

/* ============================================
   REGION
   Consistent vertical padding for page sections
   (Alternative to section if you need both)
   ============================================ */

.region {
  padding-block: var(--section-space-md);
}

.region-sm {
  padding-block: var(--section-space-sm);
}

.region-lg {
  padding-block: var(--section-space-lg);
}

.region-xl {
  padding-block: var(--section-space-xl);
}

/* ============================================
   RESPONSIVE VISIBILITY
   Show/hide at breakpoints
   ============================================ */

.hide-mobile {
  display: none;
}

@media (min-width: 48rem) {
  .hide-mobile {
    display: block;
  }
  
  .hide-desktop {
    display: none;
  }
}

.hide-tablet {
  display: block;
}

@media (min-width: 48rem) and (max-width: 63.99rem) {
  .hide-tablet {
    display: none;
  }
}