/* Navigation Styles */

.navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-white);
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.navigation.scrolled {
  border-bottom: 1.5px solid var(--color-gray-200);
}

.navigation__container {
  width: 100%;
  padding: 0 var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px; /* 9 * 8px grid */
}

/* Brand Section */
.navigation__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand__logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand__icon {
  width: 40px;
  height: 40px;
}

.brand__name {
  font-family: var(--font-family-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  letter-spacing: var(--tracking-tight);
}

/* Mobile Menu Toggle Button */
.navigation__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
  color: var(--color-gray-700);
  transition: color var(--transition-fast);
}

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

.navigation__toggle-icon {
  width: 24px;
  height: 24px;
}

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

/* Navigation Menu */
.navigation__menu {
  display: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

@media (min-width: 768px) {
  .navigation__menu {
    display: flex;
  }
}

/* Mobile Menu Overlay */
@media (max-width: 767px) {
  .navigation__menu {
    display: block;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    overflow-y: auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .navigation__menu.active {
    transform: translateX(0);
  }
}

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

@media (max-width: 767px) {
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4) 0;
  }
}

.nav__item {
  display: flex;
  align-items: center;
}

.nav__link {
  font-family: var(--font-family-primary);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  text-decoration: none;
  padding: var(--space-2) var(--space-1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  letter-spacing: var(--tracking-normal);
}

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

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

@media (max-width: 767px) {
  .nav__link {
    display: block;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
    border-bottom: 1px solid var(--color-gray-100);
  }
  
  .nav__link:hover {
    background-color: var(--color-gray-50);
  }
}

/* Authentication Section */
.navigation__auth {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Mobile auth inside menu */
.navigation__auth--mobile {
  display: none;
}

@media (max-width: 767px) {
  .navigation__auth--desktop {
    display: none;
  }
  
  .navigation__auth--mobile {
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-2);
    border-top: 1px solid var(--color-gray-200);
    margin-top: var(--space-4);
  }
}

.auth-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-family-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-normal);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  color: inherit;
}

.auth-button--login {
  color: var(--color-gray-600);
  background-color: transparent;
  border: 1px solid transparent;
}

.auth-button--login:hover {
  color: var(--color-gray-900);
  background-color: var(--color-gray-50);
}

.auth-button--signup {
  color: var(--color-white);
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.auth-button--signup:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.auth-button--signup:active {
  transform: translateY(0);
}

.auth-button__icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-white);
  border-radius: 50%;
  flex-shrink: 0;
}

.auth-button__icon {
  width: 18px;
  height: 18px;
}

/* Mobile Navigation */
@media (max-width: 767px) {
  .navigation__container {
    padding: 0 var(--space-4);
    height: 64px; /* 8 * 8px grid */
  }

  .brand__name {
    font-size: var(--text-base);
  }

  .navigation__auth--mobile .auth-button {
    width: 100%;
    justify-content: center;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    min-height: 48px;
  }
}

/* Responsive adjustments for very small screens */
@media (max-width: 480px) {
  .navigation__container {
    padding: 0 var(--space-2);
  }

  .brand__name {
    display: none;
  }

  .auth-button__icon-container {
    width: 28px;
    height: 28px;
  }

  .auth-button__icon {
    width: 16px;
    height: 16px;
  }

  .auth-button--signup .auth-button__icon {
    display: none;
  }
}