.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.logo:hover {
    color: var(--accent-color);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    padding: 1rem 0;
    transition: var(--transition);
}

header.scrolled {
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-color);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: relative;
    width: 30px;
    height: 30px;
}

.mobile-nav-toggle span,
.mobile-nav-toggle span::before,
.mobile-nav-toggle span::after {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--primary-color);
    transition: var(--transition);
}

.mobile-nav-toggle span {
    top: 50%;
    transform: translateY(-50%);
}

.mobile-nav-toggle span::before {
    content: '';
    top: -8px;
}

.mobile-nav-toggle span::after {
    content: '';
    bottom: -8px;
}

.mobile-nav-toggle.active span {
    background: transparent;
}

.mobile-nav-toggle.active span::before {
    transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle.active span::after {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        padding: 1rem 0;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }
}