header {
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(1, 1, 1, 1) 0%, rgba(1, 1, 1, 0.75) 100%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: auto;
}

.logo-box {
    display: flex;
    align-items: center;
}

.logo {
    height: 40px;
}

/* Меню */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: bold;
    transition: color 0.3s ease;
}

.main-nav a:hover {
    color: var(--color-accent);
}

/* Бургер и мобилен стил */
.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1100;
}

.burger span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    display: block;
    transition: 0.4s;
}

@media (max-width: 768px) {
    .burger {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #1a1a1a;
        overflow: hidden;
        max-height: 0;
        transition: max-height 0.6s ease-in-out;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 2rem;
        gap: 1rem;
    }

    .main-nav.open {
        max-height: 500px; /* достатъчно за 5-6 елемента */
    }

    /* Анимация за хикс */
    .burger.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .burger.open span:nth-child(2) {
        opacity: 0;
    }

    .burger.open span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

.main-nav a {
    position: relative;
}

.main-nav a::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.main-nav a:hover::after {
    width: 100%;
}

.main-nav a.active::after {
    width: 100%;
}

.main-nav a.active {
    color: var(--color-accent);
}