@charset "UTF-8";

/*-------------------------------------------
header
-------------------------------------------*/
#header {
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* archiveクラスのulスタイルを無効化 */
body.archive #header ul {
  border: none !important;
  border-radius: 0 !important;
  overflow: visible !important;
}

/* archiveクラスのliスタイルを無効化 */
body.archive #header li {
  font-size: inherit !important;
  border-bottom: none !important;
  padding: 0 !important;
  text-align: inherit !important;
  transition: none !important;
}

/* archiveクラスのaスタイルを無効化 */
body.archive #header a {
  color: inherit !important;
  display: inherit !important;
  transition: inherit !important;
}

/* archiveクラスのaホバースタイルを無効化（header.cssのホバーは保持） */
body.archive #header a:hover {
  /* header.cssで定義したホバースタイルは保持し、archive関連のホバーを無効化 */
  background-color: transparent !important;
  background: transparent !important;
  color: #666 !important; /* header.cssの.nav-menu a:hoverの色を保持 */
}

/* archiveクラスのliホバースタイルも無効化 */
body.archive #header li:hover {
  background-color: transparent !important;
  background: transparent !important;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  max-width: 1200px;
  margin: 0 auto;
}

/*-------------------------------------------
site branding
-------------------------------------------*/
.site-branding {
  flex-shrink: 0;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: bold;
}

.site-title a {
  color: #333;
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-title a:hover {
  color: #666;
}

.site-description {
  margin: 5px 0 0 0;
  font-size: 0.875rem;
  color: #666;
}

/*-------------------------------------------
navigation
-------------------------------------------*/
.main-navigation {
  position: relative;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 30px;
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  color: #333;
  text-decoration: none;
  font-weight: 500;
  padding: 10px 0;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a:hover {
  color: #666;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: #333;
  transition: width 0.3s ease;
}

.nav-menu a:hover::after {
  width: 100%;
}

/*-------------------------------------------
menu toggle (mobile)
-------------------------------------------*/
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.menu-toggle-text {
  font-size: 0.875rem;
  color: #333;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.hamburger span {
  width: 20px;
  height: 2px;
  background-color: #333;
  transition: all 0.3s ease;
}

.menu-toggle.active .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active .hamburger span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(2px, -2px);
}

/*-------------------------------------------
SP
-------------------------------------------*/
@media screen and (max-width: 767px) {
  .header-content {
    padding: 10px 16px;
  }
  
  .site-title {
    font-size: 1.25rem;
  }
  
  .site-description {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    right: 5%;
    width: 90vw;
    background-color: #fff;
    flex-direction: column;
    gap: 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-menu li {
    border-bottom: 1px solid #eee;
  }
  
  .nav-menu a {
    display: block;
    padding: 15px 20px;
    border-bottom: none;
  }
  
  .nav-menu a::after {
    display: none;
  }
}