/* ==========================================================================
   Navigation CSS - Sokrat Development
   Sticky Navigation with Effects
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: var(--z-70);
    transition: all var(--transition-base) var(--ease-out);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
    transition: all var(--transition-base);
    z-index: -1;
}

.navbar.scrolled {
    height: var(--nav-height-scrolled);
}

.navbar.scrolled::before {
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .navbar.scrolled::before {
    background: rgba(255, 255, 255, 0.9);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    z-index: var(--z-10);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: var(--fw-bold);
    color: white;
    transition: transform var(--transition-base) var(--ease-bounce);
}

.nav-logo:hover .logo-icon {
    transform: rotate(-10deg) scale(1.05);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
}

.logo-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-item {
    position: relative;
}

.nav-link {
    position: relative;
    font-size: var(--fs-base);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    padding: var(--space-2) 0;
    transition: color var(--transition-base);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

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

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-1);
    border: 1px solid var(--border-color);
}

.lang-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    color: var(--text-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: white;
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    border-color: var(--primary-500);
    transform: scale(1.05);
}

.theme-toggle i {
    position: absolute;
    font-size: var(--fs-lg);
    transition: all var(--transition-base);
}

.theme-toggle .fa-moon {
    opacity: 1;
    color: var(--primary-400);
}

.theme-toggle .fa-sun {
    opacity: 0;
    color: var(--warning-500);
    transform: rotate(-90deg);
}

[data-theme="light"] .theme-toggle .fa-moon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="light"] .theme-toggle .fa-sun {
    opacity: 1;
    transform: rotate(0);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    position: relative;
    z-index: var(--z-10);
}

.hamburger {
    position: relative;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Scroll Progress Bar */
.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--gradient-primary);
    z-index: var(--z-10);
    transition: width 0.05s linear;
}

/* Mobile Styles */
@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 400px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        gap: var(--space-6);
        padding: var(--space-8);
        transition: right var(--transition-slow) var(--ease-out);
        border-left: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: var(--fs-xl);
    }
    
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Hide desktop language switcher */
    .nav-actions .language-switcher {
        display: none;
    }
    
    /* Show mobile language switcher in nav menu */
    .nav-lang-mobile {
        display: block;
        margin-top: var(--space-4);
        padding-top: var(--space-4);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-lang-mobile .language-switcher {
        display: flex;
        justify-content: center;
    }
}

/* Hide mobile language switcher on desktop */
.nav-lang-mobile {
    display: none;
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-4);
    }
    
    .logo-text {
        display: none;
    }
}

/* Overlay for mobile menu */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    opacity: 0;
    visibility: hidden;
    z-index: var(--z-60);
    transition: all var(--transition-base);
}

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