.header {
    background: var(--dark);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-dark);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo img {
    height: 32px;
    width: auto;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav__link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.75);
    font-weight: 500;
    font-size: 14px;
    transition: color var(--transition);
    position: relative;
    padding: 6px 0;
}

.nav__link:hover,
.nav__link.active {
    color: var(--white);
}

.header__contacts {
    display: flex;
    align-items: center;
    gap: 24px;
}

.header__phone {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: white;
    line-height: 1.2;
}

.header__phone strong {
    font-size: 14px;
    font-weight: 600;
}

.header__phone span {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
}

.btn-callback {
    background: var(--accent);
    color: white;
    padding: 12px 22px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid var(--accent);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.btn-callback:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Бургер */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 1001;
}

.burger-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background: white;
    transition: all 0.3s ease;
    position: absolute;
}

.burger-menu span:nth-child(1) { transform: translateY(-7px); }
.burger-menu span:nth-child(3) { transform: translateY(7px); }

.burger-menu.active span:nth-child(1) { transform: translateY(0) rotate(45deg); }
.burger-menu.active span:nth-child(2) { opacity: 0; }
.burger-menu.active span:nth-child(3) { transform: translateY(0) rotate(-45deg); }

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

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--dark);
        padding: 90px 32px 32px;
        transition: right 0.3s ease;
        z-index: 1000;
        border-left: 1px solid var(--border-dark);
    }

    .nav.active { right: 0; }

    .nav__list {
        flex-direction: column;
        gap: 0;
    }

    .nav__link {
        display: block;
        font-size: 15px;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-dark);
        color: rgba(255, 255, 255, 0.9);
    }

    .header__contacts { display: none; }

    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.6);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

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