body {
    margin: 0;
    font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    background-color: #0a0a0a;
    color: #fff;
    padding-top: 100px;
}

/* HEADER */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px 40px;
    background-color: #000;
    z-index: 1000;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
    flex-wrap: wrap;
}

.main-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    border: 1px solid #fff;
    border-radius: 2px;
    background-color: transparent;
}

/* LOGO */
.logo img {
    height: 100px;
    width: auto;
    filter: drop-shadow(0 0 2px rgba(179, 215, 255, 0.2));
    transition: all 0.4s ease;
    animation: logoPulse 4s ease-in-out infinite;
    margin-right: 40px;
}

@keyframes logoPulse {
    0%, 100% {
        filter: drop-shadow(0 0 2px rgba(179, 215, 255, 0.2));
    }
    50% {
        filter: drop-shadow(0 0 6px rgba(179, 215, 255, 0.5));
    }
}

.logo img:hover {
    transform: scale(1.03);
    filter: drop-shadow(0 0 10px rgba(179, 215, 255, 0.6));
}

/* NAVIGATION */
.main-nav {
    display: flex;
    justify-content: center;
    flex-grow: 1;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

/* Base link/button look */
.main-nav a,
.main-nav button {
    position: relative;
    display: inline-block;
    padding: 8px 16px;
    color: #fff;
    text-decoration: none;
    font-size: 1.3rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    border-radius: 4px;
    background: none;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Glowing subtle gradient */
.main-nav a::before,
.main-nav button::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(179, 215, 255, 0.15), transparent 70%);
    opacity: 0.5;
    border-radius: inherit;
    z-index: -1;
    animation: glowPulse 3.5s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        opacity: 0.4;
        filter: blur(1px);
    }
    50% {
        opacity: 0.8;
        filter: blur(2px);
    }
}

/* Hover / active */
.main-nav a:hover,
.main-nav button:hover {
    color: #fff;
    transform: translateY(-2px);
    border-color: rgba(179, 215, 255, 0.4);
    box-shadow: 0 0 12px rgba(179, 215, 255, 0.5);
}

.main-nav a.active,
.main-nav button.active {
    color: #fff;
    border-color: rgba(179, 215, 255, 0.6);
    box-shadow: 0 0 14px rgba(179, 215, 255, 0.6);
}

/* Menu Toggle for Mobile */
.menu-toggle {
    display: none;
    cursor: pointer;
}

.menu-toggle div {
    width: 28px;
    height: 3px;
    background-color: #b3d7ff;
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-header {
        padding: 16px 24px;
    }

    .main-nav ul {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        width: 100%;
        order: 2;
        justify-content: flex-start;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 16px;
        display: none;
        margin-top: 12px;
    }

    .main-nav ul.show {
        display: flex;
    }

    .main-nav a,
    .main-nav button {
        font-size: 1rem;
        padding: 10px 16px;
    }

    .menu-toggle {
        display: block;
        order: 1;
    }
}