/* ============================================================================
   Layout: Header & Language Switchers
   ========================================================================= */

.language-switcher-modern {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: var(--z-top);
    display: block;
}

.lang-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(26, 31, 58, 0.8);
    backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.lang-trigger:hover {
    background: rgba(26, 31, 58, 0.95);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: var(--glow-blue);
    transform: translateY(-2px);
}

.lang-trigger__globe {
    width: 20px;
    height: 20px;
    color: var(--color-brand-cyan);
}

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

.lang-trigger__chevron {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.lang-trigger.active .lang-trigger__chevron {
    transform: rotate(180deg);
}

.lang-dropdown-modern {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 150px;
    width: max-content;
    background: rgba(26, 31, 58, 0.95);
    backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    box-shadow: var(--shadow-xl);
}

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

.lang-option-modern {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.lang-option-modern:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-brand-cyan);
    transform: translateX(4px);
}

.lang-option-modern.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-brand-cyan);
    font-weight: 600;
}

.lang-option-modern.active::after {
    content: '✓';
    margin-left: auto;
    color: var(--color-brand-cyan);
}

.lang-option__native {
    font-weight: 500;
}

.lang-option__code {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    margin-left: auto;
}

.header-modern-2025 {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-modern-2025.scrolled {
    background: rgba(15, 20, 25, 0.95);
    padding: 0.75rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    border-bottom-color: rgba(59, 130, 246, 0.2);
}

.navbar-modern {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.nav-brand-modern {
    flex-shrink: 0;
}

.logo-modern {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-family-headings);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    transition: all 0.3s ease;
    position: relative;
}

.logo-modern:hover {
    transform: translateY(-2px);
}

.logo-text-part {
    color: var(--color-text-primary);
    position: relative;
}

.logo-ai-highlight {
    position: relative;
    padding: 0.25rem 0.5rem;
    background: linear-gradient(135deg, var(--color-brand-cyan), var(--color-brand-purple));
    border-radius: 6px;
    color: #ffffff;
    font-weight: 900;
    box-shadow:
        0 0 20px rgba(59, 130, 246, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse-glow-ai 3s ease-in-out infinite;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

@keyframes pulse-glow-ai {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(59, 130, 246, 0.4),
            0 4px 12px rgba(0, 0, 0, 0.3);
    }
    50% {
        box-shadow:
            0 0 30px rgba(59, 130, 246, 0.6),
            0 0 40px rgba(168, 85, 247, 0.4),
            0 4px 16px rgba(0, 0, 0, 0.4);
    }
}

.logo-modern:hover .logo-ai-highlight {
    animation: glitch-effect 0.5s infinite, pulse-glow-ai 3s ease-in-out infinite;
}

/* Киберпанк Glitch эффект */
@keyframes glitch-effect {
    0%, 100% {
        transform: translate(0) scale(1.05);
        text-shadow:
            -2px 0 #ff00de,
            2px 0 #00fff9;
    }
    20% {
        transform: translate(-2px, 2px) scale(1.05);
        text-shadow:
            -3px 0 #ff00de,
            3px 0 #00fff9,
            0 0 20px rgba(59, 130, 246, 0.8);
    }
    40% {
        transform: translate(2px, -2px) scale(1.05);
        text-shadow:
            3px 0 #ff00de,
            -3px 0 #00fff9;
    }
    60% {
        transform: translate(-1px, 1px) scale(1.05) skewX(1deg);
        text-shadow:
            2px 0 #ff00de,
            -2px 0 #00fff9,
            0 0 30px rgba(168, 85, 247, 0.6);
    }
    80% {
        transform: translate(1px, -1px) scale(1.05) skewX(-1deg);
        text-shadow:
            -1px 0 #ff00de,
            1px 0 #00fff9;
    }
}

/* Дополнительный эффект: глитч линии */
.logo-ai-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(0, 255, 249, 0.3),
        transparent
    );
    opacity: 0;
    transition: opacity 0.3s ease;
}

.logo-modern:hover .logo-ai-highlight::before {
    animation: scan-line 0.8s infinite;
    opacity: 1;
}

@keyframes scan-line {
    0% {
        left: -100%;
    }
    100% {
        left: 200%;
    }
}

/* Дополнительный эффект: глитч блоки */
.logo-ai-highlight::after {
    content: 'AI';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
    color: #ffffff;
    opacity: 0;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    background: linear-gradient(135deg, #ff00de, #00fff9);
    pointer-events: none;
}

.logo-modern:hover .logo-ai-highlight::after {
    animation: glitch-blocks 0.4s infinite;
}

@keyframes glitch-blocks {
    0%, 100% {
        opacity: 0;
        transform: translateX(0);
    }
    20% {
        opacity: 0.8;
        transform: translateX(-3px);
        clip-path: polygon(0 10%, 100% 10%, 100% 40%, 0 40%);
    }
    40% {
        opacity: 0.8;
        transform: translateX(3px);
        clip-path: polygon(0 50%, 100% 50%, 100% 80%, 0 80%);
    }
    60% {
        opacity: 0.6;
        transform: translateX(-2px);
        clip-path: polygon(0 20%, 100% 20%, 100% 60%, 0 60%);
    }
    80% {
        opacity: 0.7;
        transform: translateX(2px);
        clip-path: polygon(0 70%, 100% 70%, 100% 95%, 0 95%);
    }
}

.nav-menu-modern {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link-modern {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    position: relative;
    transition: all 0.3s ease;
}

.nav-link-modern::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: var(--radius-md);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-link-modern:hover {
    color: var(--color-brand-cyan);
}

.nav-link-modern:hover::before {
    opacity: 1;
}

.nav-link-icon {
    width: 18px;
    height: 18px;
    color: var(--color-brand-cyan);
    opacity: 0;
    transform: translateX(-8px);
    transition: all 0.3s ease;
}

.nav-link-modern:hover .nav-link-icon {
    opacity: 1;
    transform: translateX(0);
}

.desktop-lang-switcher {
    position: relative;
    margin-left: 0.5rem;
}

.lang-trigger-desktop {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(26, 31, 58, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-trigger-desktop:hover {
    background: rgba(26, 31, 58, 0.9);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.lang-icon {
    width: 18px;
    height: 18px;
    color: var(--color-brand-cyan);
}

.lang-current {
    font-weight: 600;
}

.lang-chevron {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.lang-trigger-desktop.active .lang-chevron {
    transform: rotate(180deg);
}

.lang-dropdown-desktop {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 100%;
    background: rgba(26, 31, 58, 0.95);
    backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-xl);
}

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

.lang-option-desktop {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.lang-option-desktop:hover {
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-brand-cyan);
}

.lang-option-desktop.active {
    background: rgba(59, 130, 246, 0.18);
    color: var(--color-brand-cyan);
    font-weight: 600;
}

.mobile-menu-toggle-modern {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(26, 31, 58, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    position: relative;
    z-index: 1001;
    transition: all 0.3s ease;
}

.mobile-menu-toggle-modern:hover {
    background: rgba(26, 31, 58, 0.9);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger-line:not(:last-child) {
    margin-bottom: 6px;
}

.mobile-menu-toggle-modern.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle-modern.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
}

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

.mobile-menu-overlay-modern {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay-modern.show {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 1024px) {
    .nav-menu-modern {
        position: fixed;
        top: 0;
        right: 0;
        width: min(50vw, 320px);
        max-width: 360px;
        height: 100vh;
        background: rgba(15, 20, 25, 0.98);
        backdrop-filter: blur(30px) saturate(180%);
        border-left: 1px solid rgba(59, 130, 246, 0.2);
        flex-direction: column;
        align-items: flex-end;
        gap: 0;
        padding: 5rem 1.5rem 2rem;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 1000;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .nav-menu-modern::-webkit-scrollbar {
        display: none;
    }

    .nav-menu-modern.show {
        transform: translateX(0);
        box-shadow: -10px 0 50px rgba(0, 0, 0, 0.8);
    }

    .nav-link-modern {
        width: 100%;
        padding: 0.875rem 1rem;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        text-align: right;
        justify-content: flex-end;
    }

    .nav-link-icon {
        opacity: 1;
        transform: translateX(0);
        order: 2;
        margin-left: 0.5rem;
        margin-right: 0;
    }

    .desktop-lang-switcher {
        margin-left: 0;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: flex-end;
    }

    .lang-trigger-desktop {
        justify-content: flex-end;
        padding: 0.625rem 0.875rem;
        gap: 0.375rem;
        font-size: 0.85rem;
    }

    .lang-dropdown-desktop {
        position: static;
        width: auto;
        min-width: 80px;
        margin-top: 0.5rem;
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        transition: all 0.3s ease;
    }

    .lang-dropdown-desktop.show {
        opacity: 1;
        max-height: 300px;
        visibility: visible;
        transform: none;
    }

    .lang-option-desktop {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        font-weight: 600;
        text-align: center;
        justify-content: center;
    }

    .lang-option-desktop.active::after {
        content: '';
        display: none;
    }

    .mobile-menu-toggle-modern {
        display: flex;
    }

    .logo-modern {
        font-size: 1.25rem;
        gap: 0.25rem;
    }

    .logo-ai-highlight {
        padding: 0.2rem 0.35rem;
        border-radius: 4px;
    }
}

@media (max-width: 768px) {
    .language-switcher-modern {
        top: 16px;
        right: 16px;
    }

    .lang-trigger {
        padding: 10px 14px;
        font-size: 0.85rem;
    }

    .lang-dropdown-modern {
        min-width: 180px;
    }
}

@media (max-width: 480px) {
    .nav-menu-modern {
        width: min(55vw, 260px);
        border-left: none;
        height: auto;
        max-height: 90vh;
        border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    }

    .header-modern-2025 {
        padding: 0.75rem 0;
    }
}