/* ─── A Guide To — Layout System (Dark Theme) ─── */

/* Page container */
.page-container {
  max-width: var(--agt-max-width);
  margin: 0 auto;
  padding: 0 var(--agt-space-5);
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .page-container {
    padding: 0 var(--agt-space-4);
  }
}

/* Content area (readable width) */
.content-area {
  max-width: var(--agt-content-width);
}

/* Content + sidebar layout */
.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr var(--agt-sidebar-width);
  gap: var(--agt-space-7);
  align-items: start;
}

@media (max-width: 1024px) {
  .content-with-sidebar {
    grid-template-columns: 1fr;
    gap: var(--agt-space-5);
  }
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 100px;
}

@media (max-width: 1024px) {
  .sidebar {
    position: static;
  }
}

/* Responsive grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--agt-space-5);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--agt-space-5);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--agt-space-5);
}

@media (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Hero section */
.hero {
  position: relative;
  width: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background-color: var(--agt-bg-dark);
  color: var(--agt-white);
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--agt-content-width);
  padding: var(--agt-space-8) var(--agt-space-5);
}

.hero h1 {
  font-size: var(--agt-text-5xl);
  color: var(--agt-white);
  margin-bottom: var(--agt-space-4);
  font-weight: var(--agt-weight-extrabold);
}

.hero p {
  font-size: var(--agt-text-xl);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.85);
}

@media (max-width: 768px) {
  .hero {
    min-height: 300px;
  }
  .hero h1 {
    font-size: var(--agt-text-3xl);
  }
  .hero-content {
    padding: var(--agt-space-7) var(--agt-space-4);
  }
}

/* Section spacing */
.section {
  padding: var(--agt-space-7) 0;
  position: relative;
  z-index: 1;
}

.section + .section {
  border-top: 1px solid var(--agt-border);
}

.section-sm {
  padding: var(--agt-space-5) 0;
}

.section-lg {
  padding: var(--agt-space-8) 0;
}

/* Section headers */
.section-header {
  margin-bottom: var(--agt-space-6);
}

.section-header h2 {
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--agt-accent);
  margin-top: var(--agt-space-2);
  border-radius: var(--agt-radius-full);
}

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--agt-space-2); }
.gap-3 { gap: var(--agt-space-3); }
.gap-4 { gap: var(--agt-space-4); }
.gap-5 { gap: var(--agt-space-5); }

/* Text alignment */
.text-center { text-align: center; }
.text-right { text-align: right; }