/* ==========================================================================
   layout.css — Grid System, Hero, Responsive Utilities
   Richter Kommunikation — AEO & KI-Beratung
   ========================================================================== */

/* --------------------------------------------------------------------------
   Responsive Grid Utilities (Mobile-First)
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-md);
}

/* 2-Column Grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 3-Column Grid */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 4-Column Grid */
.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Auto-fit grid — flexible columns */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--space-md);
}

/* Asymmetric 2-col (e.g. 60/40) */
.grid-asymmetric {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .grid-asymmetric {
    grid-template-columns: 3fr 2fr;
    align-items: center;
  }
}

/* --------------------------------------------------------------------------
   Flexbox Utilities
   -------------------------------------------------------------------------- */

.flex {
  display: flex;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

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

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

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

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

.gap-xs {
  gap: var(--space-xs);
}

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

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

/* --------------------------------------------------------------------------
   Hero Layout
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: var(--z-base);
  max-width: 800px;
}

/* Hero background gradient animation */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 80% 60% at 50% 120%,
    rgba(0, 212, 170, 0.08) 0%,
    transparent 70%
  );
  z-index: var(--z-below);
  pointer-events: none;
}

/* Hero with centered content */
.hero-centered {
  text-align: center;
}

.hero-centered .hero-content {
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Text Utilities
   -------------------------------------------------------------------------- */

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-accent {
  color: var(--color-accent-primary);
}

.text-muted {
  color: var(--color-text-secondary);
}

.text-small {
  font-size: 0.875rem;
}

.text-large {
  font-size: 1.25rem;
}

/* Heading center alignment utility for sections */
@media (min-width: 768px) {
  .text-center-desktop {
    text-align: center;
  }

  .text-center-desktop .section-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

/* --------------------------------------------------------------------------
   Spacing Utilities
   -------------------------------------------------------------------------- */

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }

/* --------------------------------------------------------------------------
   Visibility Utilities
   -------------------------------------------------------------------------- */

/* Screen Reader Only — Accessibility */
.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;
}

/* Show element only on mobile */
.mobile-only {
  display: block;
}

@media (min-width: 768px) {
  .mobile-only {
    display: none;
  }
}

/* Hide on mobile, show on desktop */
.desktop-only {
  display: none;
}

@media (min-width: 768px) {
  .desktop-only {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   Width Utilities
   -------------------------------------------------------------------------- */

.w-full {
  width: 100%;
}

.max-w-prose {
  max-width: 70ch;
}

.max-w-narrow {
  max-width: 600px;
}

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

/* --------------------------------------------------------------------------
   Divider Decorative
   -------------------------------------------------------------------------- */

.divider {
  width: 3rem;
  height: 3px;
  background-color: var(--color-accent-primary);
  border-radius: 2px;
  margin: var(--space-sm) 0;
}

.divider-center {
  margin-left: auto;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   Sticky Sidebar Layout (for long-form pages)
   -------------------------------------------------------------------------- */

@media (min-width: 1024px) {
  .layout-sidebar {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-lg);
    align-items: start;
  }

  .layout-sidebar-sticky {
    position: sticky;
    top: calc(80px + var(--space-md));
  }
}

/* --------------------------------------------------------------------------
   Highlight / Emphasis Block
   -------------------------------------------------------------------------- */

.highlight-block {
  position: relative;
  padding: var(--space-md) var(--space-md) var(--space-md) calc(var(--space-md) + 4px);
  background-color: rgba(0, 212, 170, 0.05);
  border-left: 4px solid var(--color-accent-primary);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.highlight-block p {
  margin: 0;
  max-width: none;
}

/* --------------------------------------------------------------------------
   Number / Emphasis Inline
   -------------------------------------------------------------------------- */

.highlight-number {
  color: var(--color-accent-primary);
  font-weight: 700;
  font-family: var(--font-heading);
}

/* --------------------------------------------------------------------------
   Responsive Breakpoint Reference (for documentation)
   --------------------------------------------------------------------------
   480px  — Small mobile
   640px  — Mobile landscape / large mobile
   768px  — Tablet
   1024px — Desktop
   1200px — Wide desktop (max-width boundary)
   -------------------------------------------------------------------------- */