/* =====================================================
   PHASE 2: MODERN MINIMALIST HEADER & NAVIGATION
   Using design-system.css variables
   ===================================================== */

/* Header Container */
header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    height: 80px;
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    background-color: rgba(255, 255, 255, 0.95);
    transition: var(--transition-base);
}

header.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    gap: var(--space-6);
    padding: 0 var(--space-6);
}

/* Logo - Modern with Outfit Font */
.logo {
    flex-shrink: 0;
}

.logo h1 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: var(--letter-tight);
    margin: 0;
    transition: var(--transition-fast);
}

.logo a {
    color: var(--color-dark);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo a:hover h1 {
    color: var(--color-accent);
}

/* Header Tools Container */
.header-tools {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex: 1;
    justify-content: flex-end;
}

/* Search Container - Modern Design */
.search-container {
    display: flex;
    align-items: center;
    background-color: var(--color-gray-100);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    transition: var(--transition-base);
    width: 100%;
    max-width: 400px;
}

.search-container:focus-within {
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    outline: 2px solid var(--color-accent);
    outline-offset: 0;
}

#search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--text-sm);
    font-family: var(--font-body);
    color: var(--color-dark);
    outline: none;
    padding: var(--space-2) 0;
}

#search-input::placeholder {
    color: var(--color-gray-500);
}

#search-button {
    background: transparent;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    padding: var(--space-2);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

#search-button:hover {
    color: var(--color-accent);
    transform: scale(1.1);
}

/* User Tools - Icons with Modern Styling */
.user-tools {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.tool-icon {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
    z-index: 10;
}

.tool-icon:hover {
    background-color: var(--color-gray-100);
}

.tool-icon i {
    font-size: var(--text-lg);
    color: var(--color-dark);
    transition: var(--transition-fast);
}

.tool-icon:hover i {
    color: var(--color-accent);
}

.tool-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-dark);
    display: none; /* Hidden on mobile, shown on desktop */
}

.item-count {
    position: absolute;
    top: 0;
    right: 0;
    background: linear-gradient(135deg, var(--color-accent) 0%, #0052cc 100%);
    color: var(--color-white);
    font-size: var(--text-xs);
    font-weight: 700;
    border-radius: var(--radius-full);
    min-width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-1);
    box-shadow: var(--shadow-colored);
}

/* Dropdowns - Modern Card Style */
.account-dropdown,
.cart-dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    min-width: 260px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration-normal) var(--ease-bounce);
    z-index: 1000;
    overflow: hidden;
}

.tool-icon:hover .account-dropdown,
.tool-icon:hover .cart-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Account Dropdown Styling */
.account-dropdown a {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-dark);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.account-dropdown a:hover {
    background-color: var(--color-gray-50);
    border-left-color: var(--color-accent);
    color: var(--color-accent);
}

.user-name {
    display: block;
    padding: var(--space-4);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-dark);
    border-bottom: 1px solid var(--color-gray-200);
}

/* Cart Dropdown Styling */
.cart-dropdown {
    min-width: 340px;
    max-height: 480px;
    display: flex;
    flex-direction: column;
}

#cart-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
    max-height: 320px;
}

.empty-cart-message {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    color: var(--color-gray-500);
    font-size: var(--text-sm);
}

.cart-summary {
    border-top: 1px solid var(--color-gray-200);
    padding: var(--space-4);
    background-color: var(--color-gray-50);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-dark);
}

.cart-actions {
    display: flex;
    gap: var(--space-2);
}

.cart-actions .btn {
    flex: 1;
    text-align: center;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: var(--transition-fast);
}

.cart-actions .btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, #0052cc 100%);
    color: var(--color-white);
    border: none;
}

.cart-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-colored);
}

.cart-actions .btn-outline {
    background: transparent;
    border: 2px solid var(--color-dark);
    color: var(--color-dark);
}

.cart-actions .btn-outline:hover {
    background-color: var(--color-dark);
    color: var(--color-white);
}

/* Navigation Menu - Desktop */
nav {
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links > li {
    position: relative;
}

.nav-links > li > a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-dark);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
    letter-spacing: var(--letter-normal);
}

.nav-links > li > a:hover {
    background-color: var(--color-gray-100);
    color: var(--color-accent);
}

/* Submenu - Modern Dropdown */
.has-submenu .submenu {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration-normal) var(--ease-bounce);
    overflow: hidden;
    display: none;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    display: block;
}

.has-submenu.active .submenu {
    display: flex !important;
    flex-direction: column;
}

.submenu li a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-dark);
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.submenu li a:hover {
    background-color: var(--color-gray-50);
    border-left-color: var(--color-accent);
    color: var(--color-accent);
}

/* Mobile Menu Icon - Modern Hamburger */
.menu-icon {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.menu-icon:hover {
    background-color: var(--color-gray-100);
}

.menu-icon span {
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.menu-icon.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* Responsive Design */
@media (min-width: 768px) {
    .tool-label {
        display: block;
    }
}

@media (max-width: 992px) {
    header .container {
        flex-wrap: wrap;
        height: auto;
        padding: var(--space-4) var(--space-4);
    }
    
    .header-tools {
        order: 3;
        width: 100%;
        margin-top: var(--space-3);
    }
    
    .search-container {
        max-width: 100%;
    }
    
    nav {
        order: 2;
    }
}

@media (max-width: 768px) {
    header {
        height: auto;
    }
    
    .menu-icon {
        display: flex;
    }
    
    nav .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-4);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-normal) var(--ease-out);
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }
    
    nav .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links > li {
        width: 100%;
    }
    
    .nav-links > li > a {
        width: 100%;
        padding: var(--space-4);
    }
    
    .has-submenu .submenu {
        position: static;
        transform: none;
        box-shadow: none;
        background: var(--color-gray-50);
        margin-top: var(--space-2);
        border-radius: var(--radius-lg);
    }
    
    .user-tools {
        gap: var(--space-2);
    }
    
    .tool-icon {
        padding: var(--space-2);
    }
    
    .tool-label {
        display: none;
    }
}

/* Loading State */
header.loading {
    pointer-events: none;
    opacity: 0.7;
}

/* Accessibility - Focus States */
.tool-icon:focus-within,
.nav-links a:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    header,
    .tool-icon,
    .account-dropdown,
    .cart-dropdown,
    .submenu,
    .menu-icon span {
        transition: none;
    }
}