header {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    position: relative;
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    align-items: center;
    height: 80px;
    justify-content: space-between;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.mobile-logo {
    font-size: 20px;
    font-weight: 700;
    color: #4A90E2;
    text-decoration: none;
}

.mobile-icons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.mobile-user-btn,
.mobile-menu-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-user-btn img,
.mobile-menu-btn img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.mobile-user-btn img {
    width: 27px;
    height: 27px;
}

/* Mobile Menu Panel */
.mobile-menu-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ffffff;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    z-index: 1001;
}

.mobile-menu-panel.active {
    transform: translateX(0);
}

/* Mobile Menu Header */
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
    background-color: #ffffff;
}

.mobile-menu-logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #4A90E2;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 32px;
    color: #333;
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* Mobile Menu Content */
.mobile-menu-content {
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 81px);
}

/* MENU Title */
.mobile-menu-title {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    color: #4A90E2;
    margin: 0 0 60px 0;
    letter-spacing: 2px;
}

/* Menu List */
.mobile-menu-list {
    list-style: none;
    padding: 0;
    margin: 0 0 auto 0;
}

.mobile-menu-item {
    margin-bottom: 30px;
}

.mobile-menu-toggle {
    display: block;
    width: 100%;
    padding: 20px 0;
    background: none;
    border: none;
    color: #333;
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: color 0.3s;
}

.mobile-menu-toggle:hover {
    color: #4A90E2;
}

/* Submenu */
.mobile-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-menu-item.active .mobile-submenu {
    max-height: 500px;
}

.mobile-submenu li {
    padding: 12px 0;
    text-align: center;
}

.mobile-submenu a {
    color: #666;
    font-size: 16px;
    font-weight: 400;
    text-decoration: none;
    display: block;
    transition: color 0.3s;
}

.mobile-submenu a:hover {
    color: #4A90E2;
}

/* Mobile Menu Footer */
.mobile-menu-footer {
    text-align: center;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-logo-text {
    font-size: 18px;
    font-weight: 400;
    color: #ccc;
    margin: 0 0 5px 0;
}

.footer-logo-subtext {
    font-size: 36px;
    font-weight: 700;
    color: #e0e0e0;
    margin: 0;
}

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

.logo img {
    height: 50px;
    width: auto;
}

.nav-main {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 60px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    text-decoration: none;
    color: #333;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 0;
    display: block;
    transition: color 0.3s;
}

.nav-item > a:hover {
    color: #4A90E2;
}

.nav-auth {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav-auth a {
    text-decoration: none;
    color: #666;
    font-size: 14px;
    transition: color 0.3s;
}

.nav-auth a:hover {
    color: #4A90E2;
}

/* 드롭다운 배경 (전체 너비) */
.dropdown-bg {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    width: 100vw;
    background-color: #f8f9fa;
    height: 0;
    overflow: hidden;
    transition: height 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    z-index: 999;
}

.nav-main:hover ~ .dropdown-bg {
    height: 200px;
}

/* 드롭다운 메뉴 */
.dropdown-menu {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    min-width: 200px;
    padding: 20px 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    z-index: 1000;
}

.nav-main:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    transition-delay: 0.1s;
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 30px;
    color: #333;
    text-decoration: none;
    font-size: 15px;
    transition: background-color 0.2s, color 0.2s;
    text-align: center;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    color: #4A90E2;
}

/* Responsive Media Queries */
@media (max-width: 810px) {
    .nav-menu {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    header {
        position: sticky;
        top: 0;
    }

    .desktop-nav {
        display: none;
    }

    .mobile-nav {
        display: flex;
    }
}

/* Extra small screens (Z Fold outer screen, etc.) */
@media (max-width: 350px) {
    .mobile-logo {
        font-size: 16px;
    }

    .mobile-user-btn img,
    .mobile-menu-btn img {
        width: 28px;
        height: 28px;
    }

    .mobile-user-btn img {
        width: 24px;
        height: 24px;
    }

    .mobile-menu-header {
        padding: 15px;
    }

    .mobile-menu-logo-text {
        font-size: 16px;
    }

    .mobile-menu-close {
        font-size: 28px;
        width: 36px;
        height: 36px;
    }

    .mobile-menu-content {
        padding: 30px 15px;
    }

    .mobile-menu-title {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .mobile-menu-item {
        margin-bottom: 20px;
    }

    .mobile-menu-toggle {
        padding: 15px 0;
        font-size: 20px;
    }

    .mobile-submenu a {
        font-size: 14px;
        padding: 10px 0;
    }

    .mobile-menu-footer {
        padding: 30px 0 15px;
        margin-top: 40px;
    }

    .footer-logo-text {
        font-size: 16px;
    }

    .footer-logo-subtext {
        font-size: 30px;
    }
}