* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #0f172a;
    color: white;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
}

/* Logo */
.logo {
    font-size: 22px;
    font-weight: bold;
    color: #38bdf8;
}

/* Links */
.nav-links {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-links li a {
    text-decoration: none;
    color: #cbd5f5;
    font-size: 16px;
    position: relative;
}

/* Hover underline */
.nav-links li a::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 2px;
    background: #38bdf8;
    left: 0;
    bottom: -5px;
    transition: 0.3s;
}

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

/* Button */
.btn {
    background: #38bdf8;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
}

.btn:hover {
    background: #0ea5e9;
}

/* Hamburger */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 70px;
        right: 0;
        background: #1e293b;
        flex-direction: column;
        width: 200px;
        text-align: center;
        display: none;
    }

    .nav-links li {
        padding: 15px 0;
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .btn {
        display: none;
    }
}