/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  cursor: pointer;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-weight: 900;
  font-size: var(--font-size-sm);
}

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

/* Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav a {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
}

.main-nav a.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--color-bg-alt);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile nav overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: var(--z-modal-backdrop);
}

.mobile-nav-overlay.open {
  display: block;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100vh;
  background: var(--color-bg);
  z-index: var(--z-modal);
  transition: right var(--transition-base);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav-close {
  align-self: flex-end;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.mobile-nav-close:hover {
  background: var(--color-bg-alt);
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: 500;
}

.mobile-nav a:hover,
.mobile-nav a.active {
  background: var(--color-bg-alt);
  color: var(--color-accent);
}

/* ===== SITE WRAP ===== */
.site-wrap {
  /* Full-width layout — agent floats over content */
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-text-inverse);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  color: rgba(255,255,255,0.7);
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
  line-height: 1.7;
}

.footer-col h4 {
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-4);
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.7);
  font-size: var(--font-size-sm);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.5);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* ===== PAGE LAYOUTS ===== */
.page-with-sidebar {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--space-8);
  padding: var(--space-8) 0;
}

.page-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  align-self: start;
  max-height: calc(100vh - var(--header-height) - var(--space-8));
  overflow-y: auto;
}

.page-main {
  min-width: 0;
}