/* ===== CSS Variables ===== */
:root {
    --color-bg-primary: #1a1d29;
    --color-bg-secondary: #252936;
    --color-bg-tertiary: #2d3142;
    --color-accent-blue: #1d4ed8;
    --color-accent-blue-dark: #081b50;
    --color-accent-blue-hover: #1e40af;
    --color-accent-blue-light: #2563eb;
    --color-text-primary: #e5e7eb;
    --color-text-secondary: #9ca3af;
    --color-border: #374151;
    --color-card-bg: #2d3142;
    --color-card-hover: #353a4f;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.2rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2rem;
    --spacing-sl: 0.8rem;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

a {
    color: var(--color-accent-blue-light);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent-blue-dark);
}

/* ===== Header ===== */
.header {
    background: url('img/header.webp') center top / cover no-repeat;
    border-bottom: 2px solid #28324f;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    min-height: 200px;
}

.header-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    min-height: 200px;
}

.header-icons-left {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.icon-link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-tertiary);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    transition: var(--transition);
}

.icon-link:hover {
    background: var(--color-accent-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cart-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--color-accent-blue);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.site-title {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: var(--spacing-lg);
}

.site-title p {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    margin: 0;
}

.site-title p span {
    color: var(--color-accent-blue-light);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.9);
}

/* ===== Navigation ===== */
.main-nav {
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-list {
    display: flex;
    justify-content: space-around;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-list li a {
    display: block;
    padding: var(--spacing-md) var(--spacing-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    transition: var(--transition);
}

.nav-list li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--color-accent-blue);
    transition: var(--transition);
}

.nav-list li a:hover {
    color: var(--color-accent-blue-light);
}

.nav-list li a:hover::after {
    width: 80%;
}

/* ===== Main Content ===== */
.main-content {
    padding: var(--spacing-xl) 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--spacing-lg);
}

/* ===== Slogan Section ===== */
.slogan-container {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-sl) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.slogan-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-blue-dark), var(--color-accent-blue), var(--color-accent-blue-light));
}

.slogan-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(to right, #fff, var(--color-text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.slogan-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Product Grid ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.product-card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: var(--color-card-hover);
}

.product-image {
    width: 100%;
    height: 330px;
    overflow: hidden;
    background: #ffffff;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.product-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-blue-light);
}

.btn-add-cart {
    background: var(--color-accent-blue);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
    text-decoration: none;
}

.btn-add-cart:hover {
    background: var(--color-accent-blue-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Sidebar ===== */
.sidebar {
    background: var(--color-card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-accent-blue);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-link {
    padding: var(--spacing-sm);
    color: var(--color-text-secondary);
    border-radius: 8px;
    transition: var(--transition);
    font-size: 1.0625rem;
    font-weight: 500;
}

.sidebar-link:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-accent-blue-light);
    padding-left: var(--spacing-md);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.pagination-btn {
    background: var(--color-card-bg);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    min-width: 44px;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--color-accent-blue);
    color: white;
    border-color: var(--color-accent-blue);
    transform: translateY(-2px);
}

.pagination-btn.active {
    background: var(--color-accent-blue);
    color: white;
    border-color: var(--color-accent-blue);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 2px solid var(--color-accent-blue);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.1fr 0.75fr 0.75fr 2fr 0.4fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section {
    display: flex;
    flex-direction: column;
    min-width: 0;
    gap: var(--spacing-sm);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.footer-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.footer-content .footer-section:first-child .footer-text {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.footer-content .footer-section:first-child .footer-text::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent-blue-light);
    font-weight: bold;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-list li a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.footer-content .footer-section:nth-child(4) .footer-list li a {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    padding-bottom: 4px;
}

.footer-list li a:hover {
    color: var(--color-accent-blue-light);
    padding-left: var(--spacing-xs);
}

.currency-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.currency-selector label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.currency-selector label:hover {
    color: var(--color-accent-blue-light);
}

.currency-selector input[type="radio"] {
    accent-color: var(--color-accent-blue);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
    text-align: center;
}

.copyright {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .sidebar-menu {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .header-icons-left {
        justify-content: center;
        order: 2;
    }

    .site-title {
        order: 1;
        justify-content: center;
        padding-right: 0;
    }

    .site-title h1 {
        font-size: 1.8rem;
    }

    .nav-list {
        flex-wrap: wrap;
    }

    .nav-list li a {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
    .slogan-title {
        font-size: 0.9rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .footer-content {
        grid-template-columns: 1fr;
    }

    .sidebar-menu {
        grid-template-columns: 1fr;
    }
}