/* ============================================
   Navigation Bar Component
   Created: 2025-10-13
   Purpose: グローバルナビゲーションバーのスタイル
   ============================================ */

/* ============================================
   Navbar Base
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-base);
  padding: var(--space-4) var(--space-6);
  z-index: var(--z-index-sticky);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.navbar-brand:hover {
  color: var(--color-primary-light);
}

.navbar-nav {
  display: flex;
  gap: var(--space-5);
  align-items: center;
}

/* ============================================
   Navigation Links
   ============================================ */

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-base);
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
}

.nav-link-active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  font-weight: var(--font-weight-semibold);
}

/* ============================================
   Navbar-specific Button Overrides
   Note: 基本のボタンスタイルは components/buttons.css を使用
   ============================================ */

/* Navbar buttons use rounded style */
.navbar .btn-primary,
.navbar .btn-secondary {
  border-radius: var(--radius-full);
}

/* ============================================
   Navbar-specific Icon Button Overrides
   ============================================ */

/* Navbar icon buttons use rounded style */
.navbar .btn-icon {
  border-radius: var(--radius-full);
}

/* Logout button variant for navbar */
.navbar .btn-icon-logout {
  background: var(--color-white);
  color: var(--color-error);
  border-color: var(--color-error);
}

.navbar .btn-icon-logout:hover {
  background: var(--color-error);
  color: var(--color-white);
  box-shadow: var(--shadow-error);
}

/* ============================================
   Form Reset (for button_to)
   ============================================ */

.navbar-nav form {
  margin: 0;
  padding: 0;
  display: inline-flex;
}

/* ============================================
   Locale Switcher
   ============================================ */

.nav-locale-switcher {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-gray-200);
  margin-left: var(--space-3);
}

.locale-current {
  font-size: var(--font-size-xl);
  cursor: default;
  opacity: 1;
}

.locale-link {
  font-size: var(--font-size-xl);
  text-decoration: none;
  opacity: 0.5;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.locale-link:hover {
  opacity: 1;
  transform: scale(1.1);
}

/* ============================================
   Dropdown Menu
   ============================================ */

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.nav-dropdown-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.nav-dropdown[data-dropdown-open="true"] .nav-dropdown-icon {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: var(--space-2);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
  z-index: var(--z-index-dropdown);
}

.nav-dropdown[data-dropdown-open="true"] .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  border-bottom: 1px solid var(--color-gray-100);
}

.nav-dropdown-item:last-child {
  border-bottom: none;
}

.nav-dropdown-item:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
}

.nav-dropdown-item-active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  border-left: 3px solid var(--color-primary);
  padding-left: calc(var(--space-4) - 3px);
}

/* ============================================
   Mobile Menu Toggle
   ============================================ */

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.navbar-toggle-icon {
  width: 24px;
  height: 24px;
  display: block;
}

.navbar-toggle-icon-close {
  display: none;
}

.navbar[data-navbar-open="true"] .navbar-toggle-icon {
  display: none;
}

.navbar[data-navbar-open="true"] .navbar-toggle-icon-close {
  display: block;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .navbar {
    padding: var(--space-4);
    flex-wrap: wrap;
  }

  .navbar-toggle {
    display: block;
  }

  .navbar-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
  }

  .navbar[data-navbar-open="true"] .navbar-nav {
    display: flex;
  }

  .nav-dropdown {
    width: 100%;
  }

  .nav-dropdown-menu {
    position: static;
    margin-top: var(--space-2);
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--color-gray-200);
    border-radius: 0;
    min-width: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }

  .nav-dropdown[data-dropdown-open="true"] .nav-dropdown-menu {
    display: block;
  }

  .nav-link {
    padding: var(--space-2);
    font-size: var(--font-size-sm);
    width: 100%;
    text-align: left;
  }

  .nav-dropdown-toggle {
    width: 100%;
    justify-content: space-between;
  }
  
  /* Button sizes are handled by components/buttons.css */
}

@media (max-width: 480px) {
  .navbar {
    padding: var(--space-3);
  }

  .navbar-brand {
    font-size: var(--font-size-xl);
  }

  .navbar-nav {
    gap: var(--space-1);
  }
}