/**
 * Navigation CSS
 * Header and navigation menu styles
 */

/* ============================================
   Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-md);
  max-width: 1400px;
  margin: 0 auto;
}

/* ============================================
   Logo
   ============================================ */
.nav__logo-link {
  display: block;
  line-height: 0;
}

.nav__logo {
  height: 50px;
  width: auto;
  transition: transform var(--transition-base);
}

.nav__logo:hover {
  transform: scale(1.05);
}

/* ============================================
   Mobile Toggle Button
   ============================================ */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  z-index: 1001;
}

.nav__toggle-line {
  width: 28px;
  height: 3px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.nav__toggle--active .nav__toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.nav__toggle--active .nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active .nav__toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   Navigation Menu
   ============================================ */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-accent-1);
}

.nav__link--active {
  position: relative;
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-md);
  right: var(--space-md);
  height: 2px;
  background-color: var(--color-accent-1);
}

/* ============================================
   Dropdown
   ============================================ */
.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__dropdown-icon {
  transition: transform var(--transition-base);
}

.nav__dropdown-toggle[aria-expanded="true"] .nav__dropdown-icon {
  transform: rotate(180deg);
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: var(--color-bg);
  border: 2px solid var(--color-text);
  box-shadow: var(--shadow-md);
  list-style: none;
  padding: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
}

.nav__dropdown--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.nav__dropdown-link:hover {
  background-color: rgba(47, 136, 193, 0.1);
  color: var(--color-accent-1);
}

/* ============================================
   Mobile Styles
   ============================================ */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }
  
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 350px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    padding: 100px var(--space-lg) var(--space-lg);
    background-color: var(--color-bg);
    border-left: 2px solid var(--color-text);
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-slow);
    overflow-y: auto;
  }
  
  .nav__menu--open {
    right: 0;
  }
  
  .nav__item {
    width: 100%;
  }
  
  .nav__link {
    width: 100%;
    padding: var(--space-md);
  }
  
  .nav__dropdown {
    position: static;
    width: 100%;
    border: none;
    box-shadow: none;
    padding: 0 0 0 var(--space-md);
    background-color: transparent;
  }
  
  .nav__dropdown--open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}