/* --- Header & Navigation --- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 20, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--light-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav li {
    position: relative; /* For dropdown positioning */
}

.main-nav a {
    color: var(--light-text);
    text-decoration: none;
    padding: 10px 15px;
    margin: 0 5px;
    font-weight: 400;
    transition: color 0.3s ease;
    display: block;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--primary-color);
}

/* --- Hamburger Menu --- */
.hamburger-menu {
    display: none; /* Hidden on desktop */
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-menu span {
    width: 30px;
    height: 3px;
    background-color: var(--light-text);
    border-radius: 5px;
    transition: all 0.3s cubic-bezier(0.2, 1, 0.3, 1);
}

/* Hamburger animation to 'X' */
.hamburger-menu.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}
.hamburger-menu.is-active span:nth-child(2) {
    opacity: 0;
}
.hamburger-menu.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation Styles */
@media (max-width: 992px) {
    .hamburger-menu {
        display: flex; /* Show hamburger on tablets and mobile */
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--dark-bg);
        display: flex;
        justify-content: center;
        align-items: center;
        
        /* Hide it off-screen */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-100%);
        transition: transform 0.5s cubic-bezier(0.2, 1, 0.3, 1), opacity 0.5s, visibility 0.5s;
    }

    .main-nav.nav-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .main-nav ul {
        flex-direction: column;
        text-align: center;
    }

    .main-nav a {
        font-size: 1.5rem; /* Make tap targets larger on mobile */
    }
}