/* Header and Navigation Styles */

#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent;
    padding: var(--spacing-md) 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

#header.scrolled {
    background-color: var(--bg-color);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-sm) 0;
}

#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo img {
    height: 50px;
    transition: height var(--transition-normal);
}

#header.scrolled .logo img {
    height: 40px;
}

/* Navigation */
.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-white);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-sm) var(--spacing-sm);
}

#header.scrolled .nav-link {
    color: var(--text-color);
}

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

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all var(--transition-fast);
    background-color: var(--text-white);
}

#header.scrolled .bar {
    background-color: var(--text-color);
}

/* Mobile Navigation */
@media (max-width: 991px) {
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        gap: 0;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        color: var(--text-color);
        margin: var(--spacing-sm) 0;
        padding: var(--spacing-sm) var(--spacing-lg);
        display: block;
    }
}