/* Modern Navigation Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.header.scroll-down {
    transform: translateY(-100%);
}

.header.scroll-up {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body.menu-open {
    overflow: hidden;
}

.nav {
    height: 80px;
}

.nav .container {
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 100%;
    display: flex;
    align-items: center;
    padding: 5px 0;
}

.logo img {
    height: 100%;
    width: auto;
    object-fit: contain;
    max-width: 220px;
}

.nav-links {
    position: relative;
}

.nav-links a {
    position: relative;
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1000;
}

.menu-icon {
    position: relative;
    width: 30px;
    height: 20px;
}

.menu-icon span {
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

.menu-icon span:nth-child(1) { top: 0; }
.menu-icon span:nth-child(2) { top: 9px; }
.menu-icon span:nth-child(3) { top: 18px; }

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

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

.mobile-menu-btn.active .menu-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* Responsive design */
@media (max-width: 768px) {
    .nav .container {
        padding: 0 0.75rem;
        max-width: 400px;
    }

    .mobile-menu-btn {
        display: block;
        margin-right: 1rem;
    }

    .header {
        height: 60px;
    }

    .logo {
        padding: 5px 0;
        margin-left: 0.75rem;
    }

    .logo img {
        max-width: 190px;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--white);
        padding: 2rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--white);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.3s ease;
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    .nav-links a::after {
        left: 0;
        right: 0;
    }
}