.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.main-nav::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.84);
    border-bottom: 1px solid rgba(0, 120, 212, 0.12);
    -webkit-backdrop-filter: blur(22px);
    backdrop-filter: blur(22px);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.92) 72%, rgba(0, 0, 0, 0) 100%);
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.92) 72%, rgba(0, 0, 0, 0) 100%);
}

.main-nav .nav-content {
    width: 1800px;
    max-width: calc(100% - 40px);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 18px 20px;
}

.main-nav .nav-content .logo,
.main-nav .nav-content .contact {
    width: 170px;
    min-width: 150px;
    height: 52px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main-nav .nav-content .logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.main-nav .nav-content ul.nav-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: clamp(12px, 2vw, 28px);
    margin: 0;
    padding: 0;
}

.main-nav .nav-content ul.nav-links li a {
    display: block;
    color: var(--text-color);
    font-weight: 700;
    padding: 6px 4px;
    border-bottom: 2px solid transparent;
}

.main-nav .nav-content ul.nav-links li a:hover,
.main-nav .nav-content ul.nav-links li a:focus-visible {
    color: var(--primary-color);
    border-bottom-color: var(--secondary-color);
}

.main-nav .nav-content .contact a {
    display: block;
    background-color: var(--primary-color);
    border: 2px solid var(--primary-color);
    color: var(--alt-text-color);
    padding: 10px 18px;
    font-weight: 800;
    border-radius: var(--br-def);
    white-space: nowrap;
}

.main-nav .nav-content .contact a:hover {
    background-color: #006CBE;
    color: var(--alt-text-color);
    transform: translateY(-2px);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    border-radius: var(--br-def);
}

.burger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.main-nav:has(.nav-toggle:checked) .burger span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 5px);
}

.main-nav:has(.nav-toggle:checked) .burger span:nth-child(2) {
    opacity: 0;
}

.main-nav:has(.nav-toggle:checked) .burger span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-toggle {
    display: none;
}

.main-nav .off-canvas {
    display: none;
    position: fixed;
    align-items: center;
    justify-content: center;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: -1;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: var(--nav-height) 20px 30px;
}

.main-nav:has(.nav-toggle:checked) .off-canvas {
    opacity: 1;
    pointer-events: auto;
    overflow-y: auto;
}

.main-nav .off-canvas ul.off-canvas-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 18px;
    margin: 0;
    padding: 0;
}

.main-nav .off-canvas ul.off-canvas-links li a {
    display: block;
    color: var(--alt-text-color);
    font-size: clamp(1.2rem, 4vw, 1.5rem);
    font-weight: 700;
    padding: 10px 20px;
}

.main-nav .off-canvas ul.off-canvas-links li a:hover,
.main-nav .off-canvas ul.off-canvas-links li a:focus-visible {
    color: var(--secondary-color);
}

@media (max-width: 1080px) {
    .main-nav .nav-content .contact,
    .main-nav .nav-content ul.nav-links {
        display: none;
    }

    .burger {
        display: flex;
    }

    .main-nav .off-canvas {
        display: flex;
    }
}

@media (max-width: 560px) {
    .main-nav .nav-content {
        max-width: calc(100% - 24px);
        padding-left: 0;
        padding-right: 0;
    }

    .main-nav .nav-content .logo {
        justify-content: flex-start;
        width: 155px;
        min-width: 145px;
    }
}