/* Header Styles */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header__brand {
  display: flex;
  align-items: center;
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.025em;
  z-index: 10;
}

.header__brand:hover {
  color: var(--color-primary);
}

.header__logo-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Mobile Menu Toggle */
.header__menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: var(--space-2);
  color: var(--color-text-heading);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-in-out);
  z-index: 10;
}

.header__menu-toggle:hover {
  background-color: var(--color-bg-alt);
  border-color: var(--color-border-strong);
}

.header__menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.header__hamburger {
  display: block;
  width: 1.25rem;
  height: 2px;
  background-color: currentColor;
  position: relative;
  transition: background-color var(--duration-fast);
}

.header__hamburger::before,
.header__hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--duration-fast) var(--ease-in-out);
}

.header__hamburger::before {
  top: -6px;
}

.header__hamburger::after {
  bottom: -6px;
}

.header__menu-toggle[aria-expanded="true"] .header__hamburger {
  background-color: transparent;
}

.header__menu-toggle[aria-expanded="true"] .header__hamburger::before {
  transform: translateY(6px) rotate(45deg);
}

.header__menu-toggle[aria-expanded="true"] .header__hamburger::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* Navigation */
.header__nav {
  display: flex;
  align-items: center;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.header__nav-link {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-in-out);
  position: relative;
}

.header__nav-link:hover {
  color: var(--color-accent);
}

.header__nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.header__nav-link--cta {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-lg);
  margin-left: var(--space-4);
  transition: background-color var(--duration-fast), transform var(--duration-fast);
}

.header__nav-link--cta:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

/* Mobile Styles */
@media (max-width: 767px) {
  .header__menu-toggle {
    display: flex;
  }
  
  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg-elevated);
    padding: var(--space-6);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform var(--duration-normal) var(--ease-in-out), visibility var(--duration-normal);
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
  }
  
  .header__nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }
  
  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    width: 100%;
  }

   .header__nav-list li {
    width: 100%;
  }
  
  .header__nav-link {
    font-size: var(--text-lg);
    padding: var(--space-3) 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }
  
  .header__nav-link--cta {
    margin-left: 0;
    margin-top: var(--space-4);
    text-align: center;
    width: 100%;
    border-bottom: none;
  }
}

@media (min-width: 768px) {
  .header__menu-toggle {
    display: none;
  }
  
  .header__nav {
    position: static;
    transform: none;
    visibility: visible;
    padding: 0;
    background: transparent;
    border: none;
  }
}