/* ===================================
   NAVIGATION STYLES
   ===================================
   Navigation bar, logo, and menu styles
*/
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    background: rgba(10, 10, 10, 0.9);
    padding: 10px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.logo a {
    display: block;
    transition: transform 0.3s ease;
}

.logo a:hover {
    transform: scale(1.05);
}

.logo img {
    transition: opacity 0.3s ease;
}

.logo a:hover img {
    opacity: 0.8;
}

nav .logo img {
    height: 40px;
    max-width: 100%;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    align-items: center;
    margin: 0;
    padding: 0;
}

nav ul li a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
    white-space: nowrap;
}

nav ul li a:hover,
nav ul li a.active {
    color: #ffd700;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

nav .language select {
    background: #000;
    border: 1px solid #6b7280;
    color: #ffffff;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: #ffffff;
    margin: 3px 0;
    transition: 0.3s;
    display: block;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Desktop Navigation - mặc định */
@media (min-width: 1025px) {
    .mobile-menu-btn {
        display: none;
    }
    
    nav ul {
        display: flex;
        position: static;
        background: transparent;
        height: auto;
        opacity: 1;
        visibility: visible;
        flex-direction: row;
        padding: 0;
        overflow: visible;
        transform: none;
        width: auto;
        left: auto;
        top: auto;
        right: auto;
        max-width: none;
    }
    
    nav ul li {
        width: auto;
        border: none;
        opacity: 1;
        transform: none;
        max-width: none;
    }
    
    nav ul li a {
        padding: 0;
        font-size: 16px;
        text-align: left;
    }
}

/* Tablet và Mobile - Shared mobile menu */
@media (max-width: 1024px) {
    nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}
    
    nav ul {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
        padding: 15px 20px;
        height: 70px;
        width: 100%;
        max-width: 100%;
    }
    
    .mobile-menu-btn {
        display: flex;
        flex-shrink: 0; /* Không cho shrink */
    }
    
    nav .logo {
        flex: 1;
        min-width: 0; /* Cho phép shrink nếu cần */
    }
    
    nav .logo img {
        height: 35px;
        max-width: 100%;
    }
    
    .nav-controls {
        flex-shrink: 0; /* Không cho shrink */
    }
    
    nav ul {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        max-width: 100%;
        height: calc(100vh - 70px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 30px 0; /* Loại bỏ horizontal padding */
        margin: 0;
        gap: 0;
        box-sizing: border-box;
        /* Hidden state */
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        overflow-x: hidden;
        z-index: 999;
    }
    
    nav ul.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    nav ul li {
        width: 90%; /* Sử dụng % thay vì px */
        max-width: 90%;
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        box-sizing: border-box;
    }
    
    nav ul li:last-child {
        border-bottom: none;
    }
    
    nav ul li a {
        display: block;
        width: 100%;
        padding: 20px 10px; /* Giảm horizontal padding */
        font-size: 18px;
        color: #ffffff;
        text-align: center;
        box-sizing: border-box;
        transition: all 0.3s ease;
        word-wrap: break-word; /* Cho phép break word nếu quá dài */
    }
    
    nav ul li a:hover {
        background: rgba(255, 215, 0, 0.1);
        color: #ffd700;
    }
    
    nav .language select {
        font-size: 16px;
        padding: 8px 10px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid #6b7280;
        border-radius: 5px;
        min-width: 60px;
        max-width: 80px;
    }
}

/* Tablet specific styles */
@media (max-width: 1024px) and (min-width: 769px) {
    nav {
        /* height: 80px; */
        padding: 15px 30px;
    }
    nav ul li a {
        font-size: 20px;
        padding: 25px 15px;
    }
    
    nav ul {
        padding-top: 40px;
    }
    
    nav ul li {
        width: 80%;
        max-width: 80%;
    }
}

/* Mobile specific styles */
@media (max-width: 768px) {
    nav {
        height: 60px;
        padding: 10px 15px;
    }
    
    nav .logo img {
        height: 30px;
    }
    
    nav ul {
        top: 60px;
        height: calc(100vh - 60px);
        padding: 20px 0;
    }
    
    nav ul li {
        width: 95%;
        max-width: 95%;
    }
    
    nav ul li a {
        font-size: 16px;
        padding: 18px 10px;
    }
    
    .mobile-menu-btn span {
        width: 20px;
        height: 2px;
    }
}

/* Very small screens */
@media (max-width: 480px) {
    nav {
        padding: 8px 10px;
    }
    
    nav .logo img {
        height: 25px;
    }
    
    nav ul li {
        width: 98%;
        max-width: 98%;
    }
    
    nav ul li a {
        font-size: 15px;
        padding: 16px 8px;
    }
    
    .mobile-menu-btn span {
        width: 18px;
    }
    
    nav .language select {
        font-size: 14px;
        padding: 6px 8px;
        min-width: 50px;
    }
}

/* Remove conflicting animations for mobile/tablet */
@media (max-width: 1024px) {
    nav ul li {
        opacity: 1;
        transform: none;
        transition: none;
        animation: none;
    }
    
    nav ul.active li {
        animation: none;
    }
}

/* Desktop override để đảm bảo desktop hoạt động bình thường */
@media (min-width: 1025px) {
    nav ul li {
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
    }
}