/* Header Component Styles */

/* Modern Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.8;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    position: relative;
}

.nav-brand h2 {
    color: var(--primary-blue);
    font-weight: var(--font-weight-bold);
    font-size: 1.75rem;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.02em;
    margin-top: 2px;
    display: block;
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    width: 32px;
    height: 32px;
    justify-content: center;
    align-items: center;
    gap: 4px;
    z-index: 1001;
    transition: all var(--transition-normal);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--primary-blue);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    transform-origin: center;
}

.mobile-menu-toggle:hover .hamburger-line {
    background: var(--primary-dark);
}

/* Navigation */
.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    margin: 0;
    padding: 0;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    transition: all var(--transition-normal);
    position: relative;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.nav-list a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-list a:hover {
    color: var(--primary-blue);
    background: var(--light-blue);
    transform: translateY(-1px);
}

.nav-list a:hover::before {
    width: 80%;
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    .header .container {
        padding: var(--space-md);
    }
    
    /* Show mobile menu button */
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Hide desktop navigation by default */
    .nav {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 1px solid rgba(0, 102, 204, 0.1);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        transition: transform var(--transition-normal);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
    }
    
    /* Show mobile navigation when active */
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: var(--space-lg);
        margin: 0;
    }
    
    .nav-list li {
        border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    }
    
    .nav-list li:last-child {
        border-bottom: none;
    }
    
    .nav-list a {
        display: block;
        padding: var(--space-md) 0;
        font-size: 1.1rem;
        border-radius: 0;
    }
    
    .nav-list a::before {
        display: none;
    }
    
    .nav-list a:hover {
        background: var(--light-blue);
        transform: none;
        padding-left: var(--space-sm);
    }
    
    /* Animate hamburger menu when active */
    .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
        transform: scale(0);
    }
    
    .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Prevent body scroll when mobile menu is open */
    body.mobile-menu-open {
        overflow: hidden;
    }
}

@media (max-width: 480px) {
    .header .container {
        padding: var(--space-sm);
    }
    
    .nav-brand h2 {
        font-size: 1.5rem;
    }
    
    .brand-subtitle {
        font-size: 0.8rem;
    }
    
    .nav-list {
        padding: var(--space-md);
    }
    
    .nav-list a {
        font-size: 1rem;
    }
}

/* Focus states for accessibility */
.nav-list a:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Print styles */
@media print {
    .header {
        position: relative;
        background: transparent;
        border: none;
        backdrop-filter: none;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .nav {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: row;
        gap: var(--space-md);
    }
}