/* ============================================
   Header Styles
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    z-index: 1001;
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.logo:hover .logo-text {
    color: var(--color-secondary);
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0;
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-900);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-purple);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link.active {
    color: var(--color-secondary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.lang-btn {
    background: none;
    border: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-600);
    cursor: pointer;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-secondary);
    background: var(--color-gray-50);
}

.lang-btn.active {
    color: var(--color-secondary);
}

.lang-separator {
    color: var(--color-gray-400);
}

/* Burger Menu */
.burger-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 1001;
}

.burger-line {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.burger-menu.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   Mobile Navigation
   ============================================ */
@media (max-width: 768px) {
    .burger-menu {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 999;
        overflow-y: auto;
    }
    
    .nav.active {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .nav-link {
        font-size: var(--font-size-xl);
        padding: var(--space-4);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .header-actions {
        gap: var(--space-4);
    }
    
    .language-switcher {
        position: absolute;
        bottom: var(--space-16);
        left: 50%;
        transform: translateX(-50%);
    }
    
    body.menu-open {
        overflow: hidden;
    }
}

/* ============================================
   Sticky Header Spacing
   ============================================ */
body {
    padding-top: 80px; /* Compensate for fixed header */
}

@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
}