/*
 * layout.css — Page Grid, Header, Navigation, Footer
 * NextAIWorks Theme v3.0
 * ============================================================ */

/* ============================================================
   Main Container & Page Wrap
   ============================================================ */
.pub-container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* The two-column content+sidebar split */
.pub-page-wrap {
  display: flex;
  gap: var(--content-gap);
  padding-block: var(--space-10);
  align-items: flex-start;
}

.pub-main-content {
  flex: 1;
  min-width: 0; /* Prevent flex overflow */
}

.pub-sidebar-area {
  flex: 0 0 var(--sidebar-width);
  width: var(--sidebar-width);
}

/* ============================================================
   Header
   ============================================================ */
.pub-site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

/* Top Bar: Logo | Search | Subscribe */
.pub-top-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-4) var(--space-6);
  max-width: var(--max-width);
  margin-inline: auto;
}

.pub-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}
.pub-logo img {
  height: 40px;
  width: auto;
}
.pub-logo-text {
  font-family: var(--font-ui);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--brand-navy);
  letter-spacing: -0.03em;
  white-space: nowrap;
}
.pub-logo-text em {
  color: var(--brand-blue);
  font-style: normal;
}

/* Search Bar */
.pub-search-wrap {
  display: flex;
  justify-content: center;
}
.pub-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  width: 100%;
  max-width: 420px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.pub-search:focus-within {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.pub-search svg {
  flex-shrink: 0;
  color: var(--text-muted);
  width: 16px;
  height: 16px;
}
.pub-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.95rem;
  color: var(--text-main);
  width: 100%;
  padding: 0;
}
.pub-search input::placeholder {
  color: var(--text-muted);
}

/* Header Actions (Subscribe button) */
.pub-top-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.pub-btn-subscribe {
  background: var(--brand-blue);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: 0.9rem;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  display: inline-block;
}
.pub-btn-subscribe:hover {
  background: var(--brand-blue-dark);
  color: var(--text-inverse);
  transform: translateY(-1px);
}

/* ============================================================
   Sticky Navigation Bar
   ============================================================ */
.pub-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.pub-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  min-height: 52px;
}

.pub-nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}
.pub-nav-links a {
  display: block;
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.pub-nav-links a:hover,
.pub-nav-links a[aria-current="page"] {
  color: var(--brand-blue);
  background: rgba(37, 99, 235, 0.06);
}
.pub-nav-links .nav-cta a {
  background: var(--brand-blue);
  color: var(--text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
}
.pub-nav-links .nav-cta a:hover {
  background: var(--brand-blue-dark);
  color: var(--text-inverse);
}

/* Mobile menu toggle */
.pub-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--text-main);
  border-radius: var(--radius-sm);
}
.pub-nav-toggle:focus-visible {
  outline: 3px solid var(--brand-blue);
  outline-offset: 2px;
}

/* ============================================================
   Footer
   ============================================================ */
.pub-site-footer {
  background: var(--brand-navy);
  color: var(--text-inverse);
  margin-top: var(--space-16);
}

.pub-footer-top {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-12) var(--space-6) var(--space-10);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pub-footer-brand p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-top: var(--space-4);
  margin-bottom: var(--space-5);
}

.pub-footer-col h4 {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: var(--space-5);
}
.pub-footer-col ul {
  list-style: none;
  padding: 0;
}
.pub-footer-col ul li {
  margin-bottom: var(--space-3);
}
.pub-footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}
.pub-footer-col ul li a:hover {
  color: var(--text-inverse);
}

.pub-footer-social {
  display: flex;
  gap: var(--space-3);
}
.pub-footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
  transition: background var(--transition-base), color var(--transition-fast);
}
.pub-footer-social a:hover {
  background: var(--brand-blue);
  color: var(--text-inverse);
}

.pub-footer-bottom {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-light);
}
.pub-footer-bottom a {
  color: var(--text-light);
}
.pub-footer-bottom a:hover {
  color: var(--text-inverse);
}

/* ============================================================
   Responsive Layout
   ============================================================ */
@media (max-width: 1100px) {
  .pub-footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 900px) {
  .pub-page-wrap {
    flex-direction: column;
  }
  .pub-sidebar-area {
    width: 100%;
    flex: none;
  }
  .pub-top-bar {
    grid-template-columns: 1fr auto;
    row-gap: var(--space-3);
  }
  .pub-search-wrap {
    grid-column: 1 / -1;
    order: 3;
  }
  .pub-nav-toggle {
    display: flex;
  }
  .pub-nav-links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: var(--space-4);
    z-index: 199;
  }
  .pub-nav-links.is-open {
    display: flex;
  }
  .pub-nav-links a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }
}

@media (max-width: 640px) {
  .pub-container { padding-inline: var(--space-4); }
  .pub-top-bar { padding-inline: var(--space-4); gap: var(--space-4); }
  .pub-footer-top { grid-template-columns: 1fr; padding-inline: var(--space-4); }
  .pub-footer-bottom { flex-direction: column; text-align: center; padding-inline: var(--space-4); }
}