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

.header {
    background: #1a1a1a;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 100%;
}

.logo-image {
    filter: brightness(0) invert(1);
}

nav > ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #1a1a1a;
    list-style: none;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    border-radius: 8px;
    z-index: 1100;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    display: block;
}

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1rem;
    white-space: nowrap;
}

nav a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

nav a:hover {
    color: #ff4757;
}

.btn-primary {
    background: #ff4757;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: #ff3838;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    height: 3px;
    width: 25px;
    background: #fff;
    margin: 5px 0;
    transition: 0.3s;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    .hamburger {
        display: flex;
    }

    nav {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: #1a1a1a;
        flex-direction: column;
        padding: 1rem;
    }

    nav.active {
        display: flex;
    }

    nav > ul {
        flex-direction: column;
        gap: 1rem;
    }

    .dropdown {
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        display: none;
        margin-top: 0;
        border-radius: 0;
        min-width: 100%;
        padding-left: 1rem;
    }

    .dropdown.open .dropdown-menu {
        display: block;
    }

    nav a {
        display: block;
        padding: 0.5rem 0;
    }
}