:root {
    --primary-gradient: linear-gradient(135deg, #8B7CF8 0%, #E4A5FF 100%);
    --secondary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-color: #8B7CF8;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #343a40;
    --success: #28a745;
    --warning: #ffc107;
    --error: #dc3545;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #8B7CF8 0%, #C5A3FF 50%, #E4A5FF 100%);
    min-height: 100vh;
}

/* Navigation */
.nav-arrow {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.nav-arrow:hover {
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.nav-arrow svg {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
    transition: var(--transition);
}

.nav-arrow.active svg {
    transform: rotate(180deg);
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: var(--shadow);
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.visible {
    transform: translateY(0);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 160px;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1002;
}

.nav-dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-content a:hover {
    background: var(--light-gray);
    color: var(--accent-color);
}

.nav-right {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-icon {
    position: relative;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-icon:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-icon svg {
    width: 24px;
    height: 24px;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--error);
    color: var(--white);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

/* Main Content */
.main-content {
    padding-top: 80px;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    line-height: 1.2;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.keyboard-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.keyboard-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

/* Sections */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--white);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.new-products {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.category-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.category-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0;
}

/* Products */
.featured-products {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.product-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-placeholder {
    color: var(--text-light);
    font-style: italic;
}

.product-name {
    padding: 20px 20px 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.product-price {
    padding: 0 20px 20px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 0;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    overflow-y: auto;
    padding: 20px 0;
}

.modal-content {
    background: var(--white);
    margin: 20px auto;
    padding: 40px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 600px;
    max-height: calc(100vh - 40px);
    position: relative;
    animation: modalSlideIn 0.3s ease;
    overflow-y: auto;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

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

.modal h2 {
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-primary);
}

.modal form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal input {
    padding: 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
}

.modal input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.modal button {
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    padding: 15px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.modal button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.modal p {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.modal a {
    color: var(--accent-color);
    text-decoration: none;
}

.modal a:hover {
    text-decoration: underline;
}

/* Product Categories Page */
.trapezoid-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 40px 0;
    overflow-x: auto;
    padding: 0 20px;
}

.trapezoid {
    position: relative;
    background: var(--white);
    padding: 20px 40px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    min-width: 150px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
    box-shadow: var(--shadow);
}

.trapezoid:hover {
    background: var(--accent-color);
    color: var(--white);
    transform: translateY(-3px);
}

.trapezoid.active {
    background: var(--accent-color);
    color: var(--white);
}

/* Category Hierarchy */
.category-hierarchy {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.category-level {
    margin-bottom: 30px;
}

.category-box {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 20px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
}

.category-box:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.category-box.expandable::after {
    content: '▼';
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    transition: var(--transition);
}

.category-box.expanded::after {
    transform: translateY(-50%) rotate(180deg);
}

.category-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.subcategories {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.subcategories.expanded {
    max-height: 1000px;
    margin-top: 20px;
}

/* Product Colors */
.product-colors {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.color-circle {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.color-circle:hover {
    transform: scale(1.2);
}

.color-separator {
    width: 2px;
    height: 20px;
    background: var(--medium-gray);
    margin: 0 5px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-left {
        gap: 20px;
    }
    
    .nav-right {
        gap: 15px;
    }
    
    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .trapezoid-nav {
        gap: 5px;
    }
    
    .trapezoid {
        padding: 15px 20px;
        min-width: 120px;
        font-size: 14px;
    }
    
    .modal-content {
        width: 95%;
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-container {
        padding: 60px 15px;
    }
    
    .category-card {
        padding: 30px 15px;
    }
    
    .category-icon {
        font-size: 2.5rem;
    }
    
    .nav-arrow {
        width: 45px;
        height: 45px;
        top: 15px;
        left: 15px;
    }
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Success/Error Messages */
.message {
    padding: 15px;
    border-radius: var(--border-radius);
    margin: 20px 0;
    font-weight: 500;
}

.message.success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border: 1px solid rgba(40, 167, 69, 0.3);
}

.message.error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--error);
    border: 1px solid rgba(220, 53, 69, 0.3);
}

.message.warning {
    background: rgba(255, 193, 7, 0.1);
    color: var(--warning);
    border: 1px solid rgba(255, 193, 7, 0.3);
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, #8B7CF8 0%, #C5A3FF 100%);
    color: var(--white);
    padding: 14px 32px;
    font-size: 16px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(139, 124, 248, 0.3);
    border: none;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 124, 248, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 14px 32px;
    font-size: 16px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--error);
    color: var(--white);
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control.error {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

/* Admin Styles */
.admin-container {
    background: var(--white);
    min-height: 100vh;
    color: var(--text-primary);
}

.admin-header {
    background: var(--primary-gradient);
    color: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow);
}

.admin-nav {
    display: flex;
    gap: 30px;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.admin-nav a {
    color: var(--white);
    text-decoration: none;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(255, 255, 255, 0.2);
}

.admin-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--medium-gray);
}

.table th {
    background: var(--light-gray);
    font-weight: 600;
    color: var(--text-primary);
}

.table tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.table .actions {
    display: flex;
    gap: 10px;
}

.table .actions .btn {
    padding: 6px 12px;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-left {
        gap: 20px;
    }
    
    .category-grid,
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .section-container {
        padding: 60px 15px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* User Avatar Styles */
.user-avatar-container {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 16px;
    margin-top: 8px;
}

.user-avatar-container:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-info {
    margin-bottom: 12px;
}

.user-name {
    font-weight: 600;
    color: #333;
    font-size: 14px;
    margin-bottom: 2px;
}

.user-email {
    color: #666;
    font-size: 12px;
}

.dropdown-divider {
    height: 1px;
    background: #e1e5e9;
    margin: 12px 0;
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: #333;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s ease;
    margin-bottom: 4px;
}

.dropdown-link:hover {
    background: #f8f9fa;
    color: #8B7CF8;
}

.dropdown-link svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
}

.logout-link {
    color: #dc3545;
}

.logout-link:hover {
    background: #fff5f5;
    color: #dc3545;
}