nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 10px 0;
    transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

nav.scrolled {
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

nav .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--section-max-width);
    margin: 0 auto;
}

nav .logo {
    width: 100px;
}

nav ul {
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

nav ul li {
    list-style: none;
}

nav ul li a {
    font-family: var(--font-poppins);
    font-weight: 400;
    font-size: 14px;
    
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
}

/* 모바일 메뉴 스타일 */
.mobile-menu-button {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
    z-index: 200;
}

.mobile-menu-button span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #fff;
    margin: 5px 0;
    border-radius: 4px;
    transition: 0.3s ease-in-out;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.mobile-menu-container {
    position: fixed;
    top: -20px;
    right: 20px;
    left: auto;
    width: auto;
    min-width: 200px;
    background-color: rgba(0, 0, 0, 0.85);
    padding: 20px;
    z-index: 150;
    transition: all 0.4s cubic-bezier(0.215, 0.610, 0.355, 1.000);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    visibility: hidden;
    will-change: transform, opacity;
}

/* Safari와 Chrome을 위한 backdrop-filter 설정 */
@supports (-webkit-backdrop-filter: blur(20px)) {
    .mobile-menu-container {
        background-color: rgba(0, 0, 0, 0);
        -webkit-backdrop-filter: blur(20px);
        will-change: transform, opacity;
    }
}

/* Firefox 등 표준 backdrop-filter를 지원하는 브라우저를 위한 설정 */
@supports (backdrop-filter: blur(20px)) {
    .mobile-menu-container {
        background-color: rgba(0, 0, 0, 0);
        backdrop-filter: blur(20px);
        will-change: transform, opacity;
    }
}

/* Firefox에서 backdrop-filter를 사용할 수 없는 경우 대체 스타일 */
@supports not ((backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px))) {
    .mobile-menu-container {
        background-color: rgba(0, 0, 0, 0.9);
    }
}

.mobile-menu-container.active {
    top: 70px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
}

.mobile-menu-container ul {
    flex-direction: column;
    gap: 0;
    padding: 10px 0;
    margin: 0;
    width: 100%;
}

.mobile-menu-container ul li {
    list-style: none;
    position: relative;
    margin: 5px 0;
    transition: all 0.3s ease;
}

.mobile-menu-container ul li::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(255,255,255,0.1), rgba(255,255,255,0.5), rgba(255,255,255,0.1));
    transition: width 0.4s ease;
}

.mobile-menu-container ul li:hover::after {
    width: 100%;
}

.mobile-menu-container ul li a {
    display: block;
    padding: 12px 15px;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.mobile-menu-container ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -10px;
    width: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.08);
    transform: skewX(-15deg);
    transition: all 0.4s ease;
    z-index: -1;
}

.mobile-menu-container ul li a:hover {
    color: rgba(255, 255, 255, 1);
    transform: translateX(5px);
}

.mobile-menu-container ul li a:hover::before {
    width: 120%;
}

/* 메뉴 활성화 상태에서의 햄버거 아이콘 변화 */
.mobile-menu-button.active span {
    box-shadow: 0 1px 3px rgba(255, 255, 255, 0.1);
}

.mobile-menu-button.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 5px);
    width: 22px;
}

.mobile-menu-button.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-button.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -5px);
    width: 22px;
}

/* 반응형 스타일 */
@media (max-width: 768px) {
    nav .nav-menu {
        display: none;
    }
    
    .mobile-menu-button {
        display: block;
    }
    
    nav .nav-container {
        padding: 0 20px;
    }
}

.mobile-menu-container ul li a.clicked {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(0.98);
    transition: all 0.2s ease;
}

/* 아이콘 스타일 (선택사항) */
.mobile-menu-container ul li a::after {
    content: '›';
    position: absolute;
    right: 15px;
    opacity: 0;
    font-size: 18px;
    font-weight: 300;
    transition: all 0.3s ease;
}

.mobile-menu-container ul li a:hover::after {
    opacity: 0.7;
    transform: translateX(3px);
}

/* 첫 번째와 마지막 아이템에 특별한 스타일 추가 */
.mobile-menu-container ul li:first-child a {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 15px;
    margin-top: 5px;
}

.mobile-menu-container ul li:last-child a {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 15px;
    margin-bottom: 5px;
}