/* ================================================
   NAVIGATION HEADER STYLES
================================================ */

/* Modern Navigation */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--neutral-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: var(--space-4) 0;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-xl);
    border-bottom: 1px solid rgba(0, 86, 179, 0.1);
    padding: var(--space-3) 0;
}

#navbar.scrolled .logo {
    color: var(--primary);
}

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

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: -0.02em;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--space-2);
}

.nav-menu li {
    position: relative;
}

.nav-link {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    font-weight: 500;
    color: var(--neutral-700);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: all 0.4s ease;
    border-radius: var(--radius-full);
    z-index: -1;
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-link:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-blue);
}

.nav-link.highlight {
    background: var(--gradient-secondary);
    color: var(--neutral-900);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.nav-link.highlight:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-blue);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: var(--space-1);
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--neutral-700);
    border-radius: var(--radius-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#navbar.scrolled .bar {
    background: var(--primary);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .navbar-container {
        padding: 0 var(--space-4);
    }
    
    .menu-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.3s ease;
        box-shadow: var(--shadow-xl);
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        margin: var(--space-4) 0;
    }
    
    .nav-link {
        font-size: 1.125rem;
        color: var(--neutral-700);
    }
    
    .menu-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}