/* Header Styles */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-sm);
}

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

/* Brand */
.brand-logo {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
  letter-spacing: -0.5px;
}

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

/* Desktop Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-6);
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-base);
  font-size: var(--font-size-base);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-accent);
  text-decoration: none;
}

.header-actions {
  margin-left: var(--space-4);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--space-2);
}

/* Mobile Responsive Styles */
@media (max-width: 991px) {
  .mobile-toggle {
    display: block;
    z-index: 1002;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-24) var(--space-6) var(--space-8);
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    visibility: hidden;
    z-index: 1001;
  }

  .nav-menu.is-active {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
  }

  .nav-link {
    display: block;
    font-size: var(--font-size-lg);
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-border);
  }

  .header-actions {
    margin-left: 0;
    width: 100%;
  }

  .header-actions .btn {
    width: 100%;
  }
}