.site-nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 30px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    transition: transform 0.25s ease, opacity 0.25s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.site-nav.is-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

.site-nav.is-transparent {
    background: transparent !important;
    backdrop-filter: none !important;
    border-bottom-color: transparent !important;
}

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    text-transform: none;
}

.menu-links {
    display: flex;
    gap: 40px;
    align-items: center; /* Align items vertically */
}

.menu-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

.menu-links a:hover,
.menu-links a.active {
    color: var(--text-primary);
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: color 0.3s, background-color 0.3s;
    margin-left: 10px; /* Spacing from last link */
}

.theme-toggle:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

main {
    padding: 120px 50px 50px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

footer {
    padding: 60px 50px;
    border-top: 1px solid var(--accent-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-meta {
    margin-top: 30px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
}

.socials a {
    color: var(--text-secondary);
    margin-left: 20px;
    text-decoration: none;
    transition: color 0.2s;
}

.socials a:hover {
    color: var(--text-primary);
}

/* Hamburger Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 102; /* Above sidebar */
}

.hamburger-box {
    width: 30px;
    height: 24px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px;
}

.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 30px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    position: absolute;
    transition-property: transform;
    transition-duration: 0.15s;
    transition-timing-function: ease;
}

.hamburger-inner::before, .hamburger-inner::after {
    content: "";
    display: block;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    bottom: -8px;
}

/* Active State for Hamburger */
.menu-toggle.is-active .hamburger-inner {
    transform: rotate(45deg);
}

.menu-toggle.is-active .hamburger-inner::before {
    top: 0;
    opacity: 0;
}

.menu-toggle.is-active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
}

/* Menu Overlay */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.is-active {
    opacity: 1;
    pointer-events: auto;
}

@media (max-width: 1024px) {
    .site-nav { padding: 20px; }
    
    .menu-toggle {
        display: block;
    }

    .menu-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: -100%; /* Hidden by default */
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-color, #fcfcfc);
        padding: 80px 30px;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 100;
        gap: 20px;
        align-items: flex-start; /* Reset align-items for mobile column layout */
    }

    .menu-links.is-active {
        right: 0;
    }
    
    .menu-overlay {
        display: block; /* But opacity 0 until active */
        pointer-events: none;
    }

    /* Adjust theme toggle in mobile menu */
    .theme-toggle {
        margin-left: 0;
        margin-top: 10px;
    }
}

@media (max-width: 768px) {
    main { padding: 100px 20px 40px; }

    footer { flex-direction: column; gap: 20px; text-align: center; }
    .socials a { margin: 0 10px; }
}