/* ===== HEADER & NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header--transparent {
  background: transparent;
  box-shadow: none;
}

.header--transparent .header__logo-text {
  color: #ffffff;
}

.header--transparent .nav__item > a {
  color: rgba(255, 255, 255, 0.9);
}

.header--transparent .nav__item > a:hover {
  color: #ffffff;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== LOGO ===== */
.header__logo {
  flex-shrink: 0;
  text-decoration: none;
}

.header__logo-text {
  font-size: 1.2rem;
  font-weight: 900;
  color: #026538;
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.header__logo-text .logo-gc {
  color: #026538;
  font-size: 1.35rem;
}

.header__logo-text .logo-sub {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #666;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
}

/* ===== PC NAVIGATION ===== */
.nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav__item {
  position: relative;
}

.nav__item > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 18px;
  height: 72px;
  font-size: 0.875rem;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav__item > a:hover,
.nav__item.is-open > a {
  color: #026538;
}

.nav__item > a .nav__arrow {
  font-size: 0.55rem;
  margin-left: 2px;
  transition: transform 0.25s ease;
  opacity: 0.5;
}

.nav__item.is-open > a .nav__arrow {
  transform: rotate(180deg);
  opacity: 1;
}

.nav__item > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 18px;
  right: 18px;
  height: 3px;
  background: #026538;
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.nav__item > a:hover::after,
.nav__item.is-open > a::after {
  transform: scaleX(1);
}

/* ===== DROPDOWN ===== */
.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 220px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.14);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  pointer-events: none;
}

.dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid #ffffff;
}

.nav__item:hover .dropdown,
.nav__item.is-open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: all;
}

.dropdown__item {
  display: block;
  padding: 11px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #333;
  transition: background 0.15s ease, color 0.15s ease;
  border-left: 3px solid transparent;
}

.dropdown__item:hover {
  background: rgba(2, 101, 56, 0.06);
  color: #026538;
  border-left-color: #026538;
}

/* ===== ENTRY BUTTON ===== */
.nav__entry {
  margin-left: 20px;
}

.nav__entry .btn {
  padding: 10px 24px;
  font-size: 0.875rem;
  border-radius: 4px;
}

/* ===== HAMBURGER ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1100;
}

.hamburger__line {
  display: block;
  width: 26px;
  height: 2px;
  background: #1a1a1a;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== MOBILE MENU ===== */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: min(360px, 100vw);
  height: 100vh;
  background: #ffffff;
  z-index: 1050;
  overflow-y: auto;
  transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 32px rgba(0,0,0,0.15);
}

.mobile-nav.is-open {
  right: 0;
}

.mobile-nav__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 72px;
  border-bottom: 1px solid #f0f0f0;
}

.mobile-nav__logo {
  font-size: 1rem;
  font-weight: 900;
  color: #026538;
}

.mobile-nav__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  color: #666;
  background: none;
  border: none;
  transition: color 0.2s;
}

.mobile-nav__close:hover {
  color: #026538;
}

.mobile-nav__body {
  padding: 16px 0 40px;
}

.mobile-nav__entry {
  padding: 20px;
  border-bottom: 1px solid #f0f0f0;
}

.mobile-nav__entry .btn {
  width: 100%;
  justify-content: center;
}

.mobile-accordion {
  border-bottom: 1px solid #f0f0f0;
}

.mobile-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 20px;
  font-size: 0.925rem;
  font-weight: 700;
  color: #1a1a1a;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: color 0.2s ease;
}

.mobile-accordion__trigger:hover,
.mobile-accordion__trigger.is-active {
  color: #026538;
}

.mobile-accordion__icon {
  font-size: 0.6rem;
  transition: transform 0.25s ease;
  color: #999;
  flex-shrink: 0;
}

.mobile-accordion__trigger.is-active .mobile-accordion__icon {
  transform: rotate(180deg);
  color: #026538;
}

.mobile-accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.mobile-accordion__panel.is-open {
  max-height: 400px;
}

.mobile-accordion__link {
  display: block;
  padding: 11px 20px 11px 32px;
  font-size: 0.855rem;
  color: #555;
  transition: color 0.2s ease, background 0.2s ease;
  border-left: 3px solid transparent;
  margin-left: 20px;
}

.mobile-accordion__link:hover {
  color: #026538;
  background: rgba(2, 101, 56, 0.04);
  border-left-color: #026538;
}

/* ===== OVERLAY ===== */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1040;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.nav-overlay.is-visible {
  opacity: 1;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .nav__list,
  .nav__entry {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .nav-overlay {
    display: block;
  }
}