/* ==========================================================================
   Toolbeel Finance — Site header & primary navigation
   ========================================================================== */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  gap: var(--space-4);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-text);
}

.logo:hover .logo-icon {
  background: var(--color-primary);
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--color-text);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  transition: background var(--transition-fast);
}

/* Mobile nav toggle
   ========================================================================== */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  z-index: 101;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle-icon {
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Primary nav
   ========================================================================== */
.site-nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 100;
  height: 100vh;
  width: min(78vw, 320px);
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-8) var(--space-5) var(--space-5);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.site-nav.is-open {
  transform: translateX(0);
}

.site-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-nav a {
  display: block;
  padding: var(--space-3) var(--space-2);
  color: var(--color-text);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base);
  z-index: 99;
}

.nav-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-backdrop {
    display: none;
  }

  .site-nav {
    position: static;
    height: auto;
    width: auto;
    background: transparent;
    border-left: none;
    box-shadow: none;
    padding: 0;
    transform: none;
    overflow: visible;
  }

  .site-nav ul {
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }

  .site-nav a {
    padding: var(--space-1) 0;
    color: var(--color-text-subtle);
    font-weight: 500;
    border-radius: 0;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: transparent;
    color: var(--color-text);
  }

  .site-nav a[aria-current="page"] {
    color: var(--color-text);
    font-weight: 700;
  }

  /* Homepage-only sections (Categories, Guides) have no dedicated URL of
     their own, so the active state is driven by the URL fragment instead
     of a per-page aria-current attribute. */
  body:has(#categories:target) .site-nav a[href$="#categories"],
  body:has(#guides:target) .site-nav a[href$="#guides"] {
    color: var(--color-text);
    font-weight: 700;
  }
}