header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #ffffffe6;
    backdrop-filter: blur(10px);
    padding: 0.75rem 1rem;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo a {
    color: inherit;
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 1rem;
}

.nav-links a {
    font-weight: 500;
    opacity: 0.7;
    transition: opacity 0.3s, color 0.3s, background-color 0.2s;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--color-primary);
    background: var(--color-primary-light-bg);
}

.nav-links a.active {
    opacity: 1;
    color: var(--color-primary);
    background: var(--color-primary-light-bg);
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--color-text-muted);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media screen and (max-width: 767px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding-top: 5rem;
        padding-left: 0;
        background: var(--color-bg-white);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        gap: 0;
    }

    .nav-links.open {
        right: 0;
    }

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

    .nav-links a {
        width: 100%;
        padding: 1rem 1.5rem;
        border-radius: 0;
    }

    .nav-links .cart-btn {
        width: 100%;
        justify-content: flex-start;
        padding: 1rem 1.5rem;
    }
}

footer {
    background: var(--color-bg-gray);
    padding: 0.5rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

footer p {
    opacity: 0.6;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.dev-disclaimer {
    position: fixed;
    bottom: 5px;
    right: 10px;
    padding: 0.2rem;
    font-size: 0.8rem;
    color: #FFF;
    z-index: 100;
    background: #2d16ff80;
    backdrop-filter: blur(10px);
    border-radius: 5px;
}