/**
 * Knowledge On Web — Layout & Structure
 */

/* Containers */
.kow-container {
  width: 100%;
  max-width: var(--kow-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--kow-space-6);
  padding-right: var(--kow-space-6);
}

.kow-container-reading {
  width: 100%;
  max-width: var(--kow-article-max);
  margin-left: auto;
  margin-right: auto;
}

/* Grids */
.kow-grid {
  display: grid;
  gap: var(--kow-space-6);
}

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

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

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

/* Header */
.kow-site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--kow-header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--kow-color-light-gray);
  display: flex;
  align-items: center;
}

.kow-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.kow-site-branding {
  display: flex;
  align-items: center;
  gap: var(--kow-space-3);
  text-decoration: none;
}

.kow-logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.kow-site-title {
  font-family: var(--kow-font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--kow-color-midnight);
  letter-spacing: -0.02em;
}

.kow-site-title .kow-accent-dot {
  color: var(--kow-color-ocean-blue);
}

.kow-primary-nav {
  display: flex;
  align-items: center;
}

.kow-primary-nav ul {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--kow-space-6);
}

.kow-primary-nav a {
  font-family: var(--kow-font-heading);
  font-size: var(--kow-fs-sm);
  font-weight: 600;
  color: var(--kow-color-charcoal);
  padding: var(--kow-space-2) 0;
  position: relative;
}

.kow-primary-nav a:hover,
.kow-primary-nav a:focus-visible,
.kow-primary-nav .current-menu-item > a {
  color: var(--kow-color-ocean-blue);
}

.kow-header-actions {
  display: flex;
  align-items: center;
  gap: var(--kow-space-4);
}

/* Article Reading Layout */
.kow-article-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--kow-article-max)) minmax(280px, var(--kow-sidebar-width));
  justify-content: space-between;
  gap: var(--kow-space-12);
  margin-top: var(--kow-space-8);
  margin-bottom: var(--kow-space-16);
}

.kow-article-main {
  min-width: 0;
}

.kow-article-sidebar {
  position: relative;
}

.kow-sticky-sidebar {
  position: sticky;
  top: calc(var(--kow-header-height) + var(--kow-space-6));
  display: flex;
  flex-direction: column;
  gap: var(--kow-space-6);
}

/* Footer */
.kow-site-footer {
  background-color: var(--kow-color-midnight);
  color: #94A3B8;
  padding-top: var(--kow-space-16);
  padding-bottom: var(--kow-space-8);
  margin-top: auto;
}

.kow-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--kow-space-8);
  margin-bottom: var(--kow-space-12);
}

.kow-footer-col h4 {
  color: var(--kow-color-white);
  font-size: var(--kow-fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--kow-space-4);
}

.kow-footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kow-footer-col li {
  margin-bottom: var(--kow-space-2);
}

.kow-footer-col a {
  color: #94A3B8;
  font-size: var(--kow-fs-sm);
}

.kow-footer-col a:hover {
  color: var(--kow-color-white);
}

.kow-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--kow-space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--kow-fs-xs);
}