/**
 * Layout CSS for American Veterans Rebuilding (AVR)
 * Structural styles for sticky header, snap scrolling, and grid layouts
 */

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23a3a3a3' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

[data-theme="dark"] body::before {
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23525252' fill-opacity='0.15'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.sticky-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--pico-background-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
  padding: 1rem 0;
  transition: all 0.3s ease, box-shadow 0.3s ease, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  background-color: rgba(var(--pico-background-color-rgb, 255, 255, 255), 0.95);
  transform: translateY(0);
}

[data-theme="dark"] .sticky-header {
  background-color: rgba(10, 10, 10, 0.95);
}

.sticky-header.scrolled {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.sticky-header.htmx-swapping {
  opacity: 1;
  transform: translateY(0);
}

.sticky-header.htmx-settling {
  opacity: 1;
  transform: translateY(0);
}

.sticky-header .nav-link {
  position: relative;
  padding: 0.5rem 1rem;
  border-radius: var(--pico-border-radius);
  transition: color 0.3s ease, background-color 0.3s ease;
}

.sticky-header .nav-link.active {
  background-color: var(--pico-primary-background);
  color: var(--pico-primary-inverse);
}

.snap-container {
  scroll-snap-type: y proximity;
  scroll-behavior: smooth;
}

.snap-section {
  scroll-snap-align: start;
  scroll-snap-stop: normal;
}

main.container {
  background-color: var(--pico-card-background-color);
  border-radius: 2.5rem;
  padding: 3rem 1.5rem;
  margin: 2rem auto 3rem;
  max-width: 1280px;
}

@media (min-width: 768px) {
  main.container {
    padding: 4rem 3rem;
    margin: 3rem auto 3rem;
  }
}

.fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.htmx-added {
  opacity: 1;
  transform: translateY(0);
}

.sticky-header-sentinel {
  position: absolute;
  top: 0;
  height: 1px;
  width: 100%;
  visibility: hidden;
}

.grid-responsive-2 {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 480px) {
  .grid-responsive-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .grid-responsive-2 {
    grid-template-columns: repeat(4, 1fr);
  }
}