/* Navigation Styles - Professional and Elegant */

.main-navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    z-index: 1000;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    transition: all var(--transition-medium);
}

.main-navigation.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

/* Logo - Enhanced branding */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.03);
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.nav-logo-main {
    font-size: 1.375rem;
    letter-spacing: -0.015em;
}

.nav-logo-sub {
    font-family: var(--font-accent);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-color);
    font-weight: 200;
    margin-top: 0.125rem;
}

/* Navigation Menu - Refined spacing */
.nav-menu {
    display: flex;
    list-style: none;
    gap: clamp(2rem, 4vw, 5rem);
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-family: var(--font-accent);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.625rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
    transition: width var(--transition-medium);
}

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

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

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: all var(--transition-medium);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Responsive Navigation */
@media (max-width: 1200px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 90px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        padding: 2rem 1.5rem;
        gap: 0;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        max-height: calc(100vh - 90px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
        padding: 1.25rem 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    }
    
    .nav-item:hover {
        background-color: rgba(26, 26, 46, 0.05);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        display: inline-block;
        padding: 0.75rem 2rem;
        font-size: 1rem;
    }
    
    .nav-link::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (max-width: 768px) {
    .nav-container {
        height: 70px;
        padding: 0 1.5rem;
    }
    
    .nav-menu {
        top: 70px;
        padding: 1.5rem 1rem;
    }
    
    .nav-item {
        padding: 1rem 0;
    }
    
    .nav-link {
        padding: 0.5rem 1.5rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .nav-logo-main {
        font-size: 1rem;
    }
    
    .nav-logo-sub {
        font-size: 0.5rem;
    }
}