/*
  STEWARD LAYOUT
  Centralized widths, radii, gaps, row spacing, and section spacing.
*/

:root {
  /* Container widths */
  --container-extra-wide: 108rem; /* 1728px maximum */
  --container-wide: 85rem;        /* 1360px */
  --container-standard: 75rem;    /* 1200px */
  --container-narrow: 47.5rem;    /* 760px */

  /* Page gutters */
  --page-gutter: clamp(1.25rem, 4vw, 3rem);
  --frame-gutter: clamp(0.75rem, 1.5vw, 1.5rem);

  /* Reusable gaps */
  --gap-xs: 0.5rem;
  --gap-sm: 1rem;
  --gap-md: 1.5rem;
  --gap-lg: 2.5rem;
  --gap-xl: 4rem;

  /* Vertical spacing */
  --row-space: clamp(2rem, 5vw, 4rem);
  --section-space: clamp(4.5rem, 8vw, 7.5rem);
  --section-space-compact: clamp(3rem, 6vw, 5rem);

  /* Shared radii */
  --radius-frame: clamp(1.25rem, 2vw, 2rem);
  --radius-container: 1.5rem;
  --radius-button: 100px;
  --radius-small: 0.5rem;

  /* Motion */
  --transition-fast: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.container-wide,
.container,
.container-narrow {
  width: calc(100% - (var(--page-gutter) * 2));
  margin-inline: auto;
}

.container-extra-wide {
  width: min(90%, var(--container-extra-wide));
  margin-inline: auto;
}

.container-wide {
  max-width: var(--container-wide);
}

.container {
  max-width: var(--container-standard);
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Shared page and section spacing */
.page-flow {
  display: grid;
  gap: var(--frame-gutter);
  padding-block: var(--frame-gutter);
}

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

.section-pad--compact {
  padding-block: var(--section-space-compact);
}

/* Shared grid layouts
   Container classes control width. These classes control columns. */
.layout-grid {
  display: grid;
}

.layout-grid--2-equal {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.layout-grid--3-equal {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.layout-grid--4-equal {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.layout-grid--1-2 {
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
}

.layout-grid--2-1 {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}

.layout-grid--1-auto {
  grid-template-columns: minmax(0, 1fr) auto;
}

.grid-span-full {
  grid-column: 1 / -1;
}

/* Shared gap and alignment utilities */
.gap-xs {
  gap: var(--gap-xs);
}

.gap-sm {
  gap: var(--gap-sm);
}

.gap-md {
  gap: var(--gap-md);
}

.gap-lg {
  gap: var(--gap-lg);
}

.gap-xl {
  gap: var(--gap-xl);
}

.items-start {
  align-items: start;
}

.items-center {
  align-items: center;
}

.items-stretch {
  align-items: stretch;
}

.layout-sticky-top {
  position: sticky;
  top: var(--gap-lg);
}

.section-frame {
  width: calc(100vw - (var(--frame-gutter) * 2));
  max-width: none;
  margin-inline-start: calc(50% - 50vw + var(--frame-gutter));
  margin-inline-end: 0;
  box-sizing: border-box;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-frame);
}

.section-frame--hero {
  display: grid;
  min-height: clamp(32rem, 64svh, 44rem);
  align-items: center;
}

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

.guide-footer {
  padding-block: var(--section-space-compact);
}

.measure {
  max-width: 68ch;
}

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

.stack-sm {
  gap: var(--gap-sm);
}

.stack-lg {
  gap: var(--gap-lg);
}

.stack-xl {
  gap: var(--gap-xl);
}

.stack-section {
  gap: var(--section-space-compact);
}

.section-heading {
  margin-bottom: var(--row-space);
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--gap-md);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}

.guide-hero {
  padding-block: clamp(3rem, 7vw, 6.5rem);
}

.guide-hero__inner {
  display: grid;
  gap: var(--row-space);
}

.guide-logo {
  width: 9.5rem;
  height: auto;
}

@media (max-width: 64rem) {
  .layout-grid--1-2,
  .layout-grid--2-1,
  .layout-grid--1-auto,
  .layout-grid--stack-tablet {
    grid-template-columns: 1fr;
  }

  .layout-grid--4-equal {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .layout-sticky-top {
    position: static;
  }
}

@media (max-width: 48rem) {
  .layout-grid--2-equal,
  .layout-grid--3-equal,
  .layout-grid--4-equal {
    grid-template-columns: 1fr;
  }

  .section-frame--hero {
    min-height: auto;
  }

  :root {
    --radius-container: 1.125rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}