/* Header */
header {
    background-color: var(--header-bg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px var(--shadow);
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.nav-shrink header {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.929), rgba(235, 240, 199, 0.9));
    box-shadow: 0 10px 30px rgba(250, 205, 22, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}



nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 800;
    position: relative;
    padding: 5px 0;
}

nav a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--secondary);
    transition: width 0.3s;
}

nav a:hover:after {
    width: 100%;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--secondary);
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
}

/* Responsive Header */
@media (max-width: 768px) {
    .mobile-menu {
        display: block;
    }

    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--header-bg);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px var(--shadow);
    }

    nav ul.active {
        display: flex;
    }
}