:root {
    --nb-accent: #007bff;
    --nb-accent-glow: rgba(0, 123, 255, 0.3);
    --nb-bg: #ffffff;
    --nb-border: #e9ecef;
    --nb-text: #212529;
    --nb-text-muted: #6c757d;
}

.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    background: var(--nb-bg);
    border-bottom: 1px solid var(--nb-border);
    z-index: 9999;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Scroll State */
.site-header.nb-scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nb-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: auto;
    padding: 16px 32px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Brand Styling */
.nb-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 16px;
    flex-shrink: 0;
}

.nb-logo {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.nb-brand:hover .nb-logo { 
    transform: scale(1.05);
    text-decoration: none;
}

.nb-brand-text { 
    display: flex; 
    flex-direction: column;
    gap: 2px;
}

.nb-brand-name { 
    color: var(--nb-text);
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.5px;
}

.nb-brand-tag { 
    color: var(--nb-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Desktop Links */
.nb-main-nav { 
    display: flex; 
    gap: 2px;
    align-items: center;
}

.nb-nav-link {
    color: var(--nb-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    position: relative;
}

.nb-nav-link i { 
    font-size: 0.85rem;
    transition: transform 0.2s ease;
    display: none;
}

.nb-nav-link:hover {
    color: var(--nb-text);
    background: #f8f9fa;
    text-decoration: none;
}

.nb-nav-link.nb-active {
    color: var(--nb-accent);
    font-weight: 600;
}

/* Mobile Hamburger Custom Look */
.nb-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--nb-text);
}

.nb-hamburger-inner, .nb-hamburger-inner::before, .nb-hamburger-inner::after {
    width: 24px;
    height: 2.5px;
    background: var(--nb-text);
    border-radius: 2px;
    position: absolute;
    transition: all 0.3s ease;
}

.nb-hamburger-box { width: 24px; height: 18px; position: relative; }
.nb-hamburger-inner { top: 50%; transform: translateY(-50%); }
.nb-hamburger-inner::before { content: ''; top: -7px; }
.nb-hamburger-inner::after { content: ''; top: 7px; }

.nb-open .nb-hamburger-inner { background: transparent; }
.nb-open .nb-hamburger-inner::before { transform: rotate(45deg); top: 0; }
.nb-open .nb-hamburger-inner::after { transform: rotate(-45deg); top: 0; }

/* Fullscreen Mobile Menu */
.nb-mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: #ffffff;
    z-index: -1;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
}

.nb-mobile-nav.nb-active {
    opacity: 1;
    visibility: visible;
}

.nb-mobile-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: center;
    width: 90%;
}

.nb-mobile-content .nb-nav-link {
    font-size: 1.1rem;
    justify-content: center;
    padding: 12px 16px;
}

/* Responsiveness */
@media (max-width: 950px) {
    .nb-main-nav { display: none; }
    .nb-hamburger { display: block; }
    
    .nb-wrapper {
        padding: 16px 20px;
    }
}

@media (max-width: 600px) {
    .nb-wrapper {
        padding: 12px 16px;
    }
    
    .nb-logo {
        height: 42px;
    }
    
    .nb-brand-name {
        font-size: 1.1rem;
    }
    
    .nb-brand-tag {
        font-size: 0.65rem;
    }
    
    .nb-hamburger {
        padding: 8px;
    }
}

@media (max-width: 480px) {
    .nb-brand-tag { 
        font-size: 0.55rem;
        letter-spacing: 0.3px;
    }
    .nb-brand-name { font-size: 1rem; }
}