:root {
    --primary-color: #0C6CFE;
    --primary-color-hover: #0058db;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--ds-font-family);
    color: var(--ds-color-text-primary);
    background: var(--ds-color-surface);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#main-content {
    flex-grow: 1;
}

#site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--ds-z-sticky);
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(12, 108, 254, 0.07);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
    transition: box-shadow var(--ds-transition-medium);
}

#site-header.scrolled {
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.1);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--ds-space-2);
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--ds-space-6);
    height: 64px;
}

.logo {
    font-size: var(--ds-text-xl);
    font-weight: var(--ds-font-black);
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--ds-space-2);
    flex-shrink: 0;
    position: relative;
    z-index: 1001;
    transition: opacity var(--ds-transition-base);
}

.logo:hover {
    opacity: 0.82;
}

.logo i {
    font-size: 1.3rem;
    animation: ds-spin 4s linear infinite;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2px;
    flex: 1;
    justify-content: center;
}

.nav-menu>li {
    position: relative;
}

.nav-menu>li>a,
.nav-more-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: var(--ds-space-2) 11px;
    border-radius: var(--ds-radius-md);
    font-size: var(--ds-text-sm);
    font-weight: var(--ds-font-medium);
    color: var(--ds-color-text-secondary);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
    transition: color var(--ds-transition-base), background var(--ds-transition-base);
}

.nav-menu>li>a:hover,
.nav-more-btn:hover,
.nav-has-dropdown.open .nav-more-btn {
    color: var(--primary-color);
    background: rgba(12, 108, 254, 0.06);
}

.nav-more-btn .fa-chevron-down {
    font-size: 0.65rem;
    transition: transform var(--ds-transition-medium);
}

.nav-has-dropdown:hover .fa-chevron-down,
.nav-has-dropdown.open .fa-chevron-down {
    transform: rotate(180deg);
}

.nav-dropdown-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--ds-color-surface);
    border: 1px solid rgba(12, 108, 254, 0.1);
    border-radius: 14px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(12, 108, 254, 0.07);
    padding: var(--ds-space-2);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3px;
    min-width: 300px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity var(--ds-transition-medium), visibility var(--ds-transition-medium), transform var(--ds-transition-medium);
    z-index: 100;
}

.nav-has-dropdown:hover .nav-dropdown-panel,
.nav-has-dropdown.open .nav-dropdown-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-panel a {
    display: flex;
    align-items: center;
    gap: var(--ds-space-2);
    padding: var(--ds-space-2) 11px;
    border-radius: var(--ds-radius-md);
    font-size: 0.84rem;
    font-weight: var(--ds-font-medium);
    color: var(--ds-color-text-secondary);
    text-decoration: none;
    transition: background var(--ds-transition-fast), color var(--ds-transition-fast);
}

.nav-dropdown-panel a i {
    width: 18px;
    text-align: center;
    color: var(--primary-color);
    opacity: 0.55;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: opacity var(--ds-transition-fast);
}

.nav-dropdown-panel a:hover {
    background: rgba(12, 108, 254, 0.06);
    color: var(--primary-color);
}

.nav-dropdown-panel a:hover i {
    opacity: 1;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.language-button {
    background: none;
    border: none;
    border-radius: var(--ds-radius-md);
    padding: 6px var(--ds-space-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.83rem;
    font-weight: var(--ds-font-medium);
    color: var(--ds-color-text-secondary);
    font-family: inherit;
    white-space: nowrap;
    transition: background var(--ds-transition-base), color var(--ds-transition-base);
}

.language-button:hover {
    background: rgba(12, 108, 254, 0.06);
    color: var(--primary-color);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4.5px;
    width: 38px;
    height: 38px;
    background: none;
    border: 1px solid var(--ds-color-border);
    border-radius: var(--ds-radius-md);
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    transition: border-color var(--ds-transition-base), background var(--ds-transition-base);
}

.mobile-menu:hover {
    border-color: var(--primary-color);
    background: rgba(12, 108, 254, 0.04);
}

.mobile-menu span {
    display: block;
    width: 16px;
    height: 1.5px;
    background: var(--ds-color-text-secondary);
    border-radius: 2px;
    transform-origin: center;
    transition: transform var(--ds-transition-medium), opacity var(--ds-transition-medium);
}

.mobile-menu.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

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

.mobile-menu.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav-logo {
    display: flex;
    align-items: center;
    gap: var(--ds-space-2);
    font-size: 1.05rem;
    font-weight: var(--ds-font-black);
    color: var(--primary-color);
    text-decoration: none;
}

.mobile-nav-logo i {
    font-size: 1.15rem;
    animation: ds-spin 4s linear infinite;
}

#mobileNav .ds-list-item i {
    width: 18px;
    text-align: center;
    color: var(--primary-color);
    opacity: 0.6;
    font-size: 0.87rem;
    flex-shrink: 0;
    transition: opacity var(--ds-transition-fast);
}

#mobileNav .ds-list-item:hover i {
    opacity: 1;
}

.mobile-lang-btn.language-button {
    width: 100%;
    justify-content: center;
    padding: 9px !important;
    border: 1px solid rgba(12, 108, 254, 0.18) !important;
    border-radius: var(--ds-radius-md) !important;
    background: rgba(12, 108, 254, 0.04) !important;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu {
        display: flex;
    }

    .site-nav {
        padding: 0 var(--ds-space-4);
    }

    .logo {
        font-size: var(--ds-text-base);
    }

    .logo i {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    .site-nav {
        height: 58px;
    }
}

.lang-dd {
    background: var(--ds-color-surface);
    border: 1px solid rgba(12, 108, 254, 0.12);
    border-radius: 14px;
    padding: var(--ds-space-2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 2px 8px rgba(12, 108, 254, 0.07);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3px;
    min-width: 240px;
    animation: lang-dd-in 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes lang-dd-in {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.lang-dd-item {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: var(--ds-space-2) 10px;
    border: none;
    background: none;
    border-radius: var(--ds-radius-sm);
    cursor: pointer;
    font-size: 0.81rem;
    font-weight: var(--ds-font-medium);
    color: var(--ds-color-text-secondary);
    font-family: inherit;
    text-align: left;
    width: 100%;
    transition: background var(--ds-transition-fast), color var(--ds-transition-fast);
}

.lang-dd-item:hover {
    background: rgba(12, 108, 254, 0.06);
    color: var(--primary-color);
}

.lang-dd-active {
    background: rgba(12, 108, 254, 0.08);
    color: var(--primary-color);
    font-weight: var(--ds-font-semibold);
}

.lang-dd-flags {
    display: flex;
    gap: 2px;
    align-items: center;
    flex-shrink: 0;
}

.lang-dd-flag {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
}

.lang-dd-name {
    flex: 1;
}

.lang-dd-check {
    font-size: 0.68rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

@media (max-width: 576px) {
    .lang-dd {
        grid-template-columns: 1fr;
        min-width: 175px;
    }
}