/**
 * Header & Navigation Component
 * 
 * @package Artur_Developer
 */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.site-header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-bottom-color: var(--color-border);
}

.header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: var(--header-height);
    padding: var(--spacing-md) 0;
}

/* Left Navigation */
.nav-left {
    justify-self: start;
}

/* Center Logo */
.site-branding {
    justify-self: center;
}

.site-logo {
    font-size: var(--text-base);
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-transform: uppercase;
}

.site-logo .logo-text {
    color: #fff;
}

/* Avatar logo based on hero-circle-frame */
.site-logo .hero-circle-frame {
    width: 35px;
    height: 35px;
}

.site-logo .hero-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Right Section */
.nav-right {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
}

.nav-menu a:hover {
    color: #fff;
}

/* CTA Button */
.nav-cta {
    background: var(--color-primary);
    color: #0A0A0A;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-primary-light);
    color: #0A0A0A;
    transform: translateY(-2px);
}

/* Language Switcher */
.lang-switcher {
    position: relative;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 14px;
    background: transparent;
    border: none;
    border-radius: 9999px;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: 10px 15px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-current:hover {
    border-color: var(--color-primary);
    color: #fff;
}

.lang-flag {
    width: 20px;
    height: 20px;
    border-radius: 999px;
    overflow: hidden;
    flex-shrink: 0;
}

.lang-flag svg,
.lang-flag img {
    width: 100%;
    height: 100%;
    display: block;
}

.lang-code {
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
}

.lang-arrow {
    transition: transform var(--transition-fast);
    opacity: 0.6;
}

.lang-switcher.open .lang-arrow {
    transform: rotate(180deg);
}

/* Dropdown */
.lang-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    min-width: 100%;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 100;
}

.lang-switcher.open .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.lang-option:hover {
    background: var(--color-bg-tertiary);
    color: #fff;
}

.lang-option .lang-code {
    font-family: var(--font-mono);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    background: var(--color-bg-secondary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    transition: all var(--transition-fast);
    z-index: 1001;
}

.menu-toggle:hover {
    background: var(--color-bg-tertiary);
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

/* Burger animation to X */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===================================
   MOBILE FULLSCREEN NAVIGATION
   =================================== */

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

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

/* Mobile Nav Container */
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.mobile-nav.active {
    transform: translateX(0);
}

/* Mobile Nav Header */
.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    min-height: var(--header-height);
}

.mobile-nav-logo {
    font-size: var(--text-base);
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-transform: uppercase;
}

/* Avatar inside mobile logo */
.mobile-nav-logo .hero-circle-frame {
    width: 40px;
    height: 40px;
}

.mobile-nav-logo .hero-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mobile-nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-secondary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
    background: var(--color-bg-tertiary);
}

.mobile-nav-close svg {
    width: 20px;
    height: 20px;
    stroke: #fff;
}

/* Mobile Nav Content */
.mobile-nav-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Mobile Menu Items */
.mobile-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu li {
    overflow: hidden;
}

.mobile-menu a {
    display: block;
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    color: var(--color-text-secondary);
    padding: var(--spacing-md) 0;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    transition: all var(--transition-fast);
    transform: translateY(100%);
    opacity: 0;
}

.mobile-nav.active .mobile-menu a {
    transform: translateY(0);
    opacity: 1;
}

/* Staggered animation */
.mobile-menu li:nth-child(1) a { transition-delay: 0.1s; }
.mobile-menu li:nth-child(2) a { transition-delay: 0.15s; }
.mobile-menu li:nth-child(3) a { transition-delay: 0.2s; }
.mobile-menu li:nth-child(4) a { transition-delay: 0.25s; }
.mobile-menu li:nth-child(5) a { transition-delay: 0.3s; }

.mobile-menu a:hover,
.mobile-menu a:focus {
    color: var(--color-primary);
    padding-left: var(--spacing-md);
}

/* Mobile Nav Footer */
.mobile-nav-footer {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.mobile-nav-cta {
    display: block;
    width: 100%;
    background: var(--color-primary);
    color: #0A0A0A;
    text-align: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-base);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.mobile-nav-cta:hover {
    background: var(--color-primary-light);
    transform: scale(1.02);
}

/* Mobile Nav Socials */
.mobile-nav-socials {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.mobile-nav-socials a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.mobile-nav-socials a:hover {
    color: var(--color-primary);
}

.mobile-nav-socials svg {
    width: 24px;
    height: 24px;
}

/* ===================================
   RESPONSIVE STYLES
   =================================== */

@media (max-width: 968px) {
    .header-inner {
        display: flex;
        justify-content: space-between;
        padding: var(--spacing-sm) 0;
    }

    /* Hide desktop nav */
    .nav-left {
        display: none;
    }

    /* Logo stays left */
    .site-branding {
        order: 1;
    }

    /* Right side: lang + burger */
    .nav-right {
        order: 2;
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
    }

    /* Hide desktop CTA */
    .nav-right .nav-cta {
        display: none;
    }

    /* Show burger */
    .menu-toggle {
        display: flex;
    }

    /* Smaller lang switcher */
    .lang-current {
        padding: 8px 12px;
    }

    .lang-flag {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    .mobile-nav-content {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .mobile-menu a {
        font-size: 1.5rem;
    }

    .lang-current {
        padding: 8px 10px;
        gap: 10px;
    }

    .lang-arrow {
        margin-left: 4px;
    }
}