/**
 * DuplexDot DIGITAL AGENCY — GLOBAL LAYOUT & TYPOGRAPHY UTILITIES
 * Core layout primitives, typography hierarchy, and utility classes.
 */

/* ==========================================================================
   1. SELECTION & SCROLLBAR
   ========================================================================== */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-background-soft);
}

::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* ==========================================================================
   2. TYPOGRAPHY HIERARCHY
   ========================================================================== */
h1, .h1 {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-h1);
  letter-spacing: var(--letter-spacing-h1);
  color: var(--color-text-primary);
}

h2, .h2 {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-h2);
  letter-spacing: var(--letter-spacing-h2);
  color: var(--color-text-primary);
}

h3, .h3 {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-h3);
  letter-spacing: var(--letter-spacing-h3);
  color: var(--color-text-primary);
}

h4, .h4 {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-h4);
  letter-spacing: var(--letter-spacing-h4);
  color: var(--color-text-primary);
}

.display-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-black);
  line-height: var(--line-height-display);
  letter-spacing: var(--letter-spacing-display);
  color: var(--color-text-primary);
}

/* Selective Modern Serif Accent (Used intentionally for editorial contrast) */
.serif-accent,
.font-serif {
  font-family: var(--font-family-serif);
  font-style: italic;
  font-weight: 400;
}

.body-large {
  font-size: var(--font-size-body-large);
  line-height: var(--line-height-body-large);
  color: var(--color-text-secondary);
}

.body-text, p {
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-secondary);
}

.text-small {
  font-size: var(--font-size-small);
  line-height: var(--line-height-small);
  color: var(--color-text-muted);
}

.text-label {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  color: var(--color-primary);
}

/* Color Modifiers */
.text-primary-color { color: var(--color-primary) !important; }
.text-dark { color: var(--color-text-primary) !important; }
.text-secondary { color: var(--color-text-secondary) !important; }
.text-muted { color: var(--color-text-muted) !important; }
.text-white { color: var(--color-white) !important; }

/* ==========================================================================
   3. CONTAINER & LAYOUT SYSTEM
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  position: relative;
  padding-top: var(--section-spacing-y);
  padding-bottom: var(--section-spacing-y);
}

.section-sm {
  position: relative;
  padding-top: var(--section-spacing-sm);
  padding-bottom: var(--section-spacing-sm);
}

.section-soft {
  background-color: var(--color-background-soft);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-subtle {
  background-color: var(--color-background-subtle);
}

.section-dark {
  background-color: var(--color-brand-dark);
  color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark .display-title {
  color: var(--color-white);
}

.section-dark p,
.section-dark .body-large {
  color: var(--color-text-inverse-muted);
}

/* ==========================================================================
   4. GRID & FLEXBOX UTILITIES
   ========================================================================== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-lg);
}

.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

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

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* ==========================================================================
   5. SPECIALIZED STRUCTURAL LAYOUTS
   ========================================================================== */

/* Split Layout (50/50 balance) */
.split-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3xl);
  align-items: center;
}

/* Centered Layout */
.centered-layout {
  text-align: center;
  max-width: var(--container-narrow-max-width);
  margin-left: auto;
  margin-right: auto;
}

/* Content + Visual Layout (50/50 UI + Explanatory Visual) */
.content-visual-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: var(--space-3xl);
  align-items: center;
}

.content-visual-layout.reversed {
  grid-template-columns: 1.15fr 1fr;
}

/* Full Width Breakout */
.full-width {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

/* Accessibility screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   6. ACCESSIBLE KEYBOARD FOCUS INDICATORS
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}