/* ===================================
   HEADER & NAVIGATION
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
    color: var(--text-dark);
}

.logo h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    font-weight: 700;
}

.logo .japanese {
    font-size: 1rem;
    margin-left: 0.5rem;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    margin-bottom: 0;
}

.nav-list a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

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

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cart-btn {
    position: relative;
    padding: 0.5rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Responsive Navigation */
@media (max-width: 968px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
    }

    .nav-list a {
        padding: var(--spacing-sm) 0;
        font-size: 1.25rem;
    }

    .nav-actions {
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--border-color);
    }
}