/* Стиль Cartier: тонкий, роскошный, с акцентом на типографику и пространство */
:root {
    --primary-text: #000000;
    --secondary-text: #666666;
    --bg: #ffffff;
    --card-bg: #fafafa;
    --border: #e0e0e0;
    --accent: #c9a77c; /* Золотистый акцент как у Cartier */
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    --font-primary: "Playfair Display", Georgia, serif;
    --font-secondary: "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-secondary);
    background-color: var(--bg);
    color: var(--primary-text);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--primary-text);
    text-decoration: none;
    position: relative;
    transition: color 0.3s;
}

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

a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent);
    transition: width 0.3s;
}

a:hover::after {
    width: 100%;
}

.btn {
    display: inline-block;
    background-color: transparent;
    color: var(--primary-text);
    padding: 12px 24px;
    border: 1px solid var(--primary-text);
    border-radius: 0;
    cursor: pointer;
    font-family: var(--font-secondary);
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.btn:hover {
    background-color: var(--primary-text);
    color: var(--bg);
}

.btn.accent {
    border-color: var(--accent);
    color: var(--accent);
}

.btn.accent:hover {
    background-color: var(--accent);
    color: var(--bg);
}

.btn.full {
    width: 100%;
    text-align: center;
    margin-top: 1rem;
}

/* Header — тонкий, невесомый */
header {
    background-color: transparent;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 a {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: 2px;
    color: var(--primary-text);
}

header nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

header nav a {
    position: relative;
    padding: 4px 0;
}

/* Hero Section — как у Cartier: большое изображение + тонкий текст */
.hero {
    height: 80vh;
    background: url('https://via.placeholder.com/1920x1080?text=KEYCAPS+HERO') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: var(--bg);
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 0 20px;
    max-width: 800px;
}

.hero h2 {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.hero p {
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 2rem;
    text-transform: uppercase;
}

/* Sections — обильные отступы */
section {
    padding: 8rem 0;
}

section.small {
    padding: 4rem 0;
}

section h2, section h3 {
    font-family: var(--font-primary);
    text-align: center;
    margin-bottom: 4rem;
    font-weight: 300;
    font-size: 2.5rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary-text);
}

/* Products Grid — минималистичная сетка */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 4rem;
}

.product-card {
    background-color: transparent;
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    margin-bottom: 1.5rem;
    transition: opacity 0.3s;
}

.product-card:hover img {
    opacity: 0.9;
}

.product-card h3 {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.product-card .price {
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--secondary-text);
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

/* Categories — тонкие карточки */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 4rem;
}

.category-card {
    display: block;
    position: relative;
    height: 300px;
    overflow: hidden;
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.category-card:hover img {
    transform: scale(1.05);
}

.category-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(transparent, rgba(0,0,0,0.6));
}

.category-card h4 {
    position: absolute;
    bottom: 20px;
    left: 20px;
    color: var(--bg);
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    z-index: 2;
}

/* Filters — тонкие, невесомые */
.filters {
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    align-items: end;
}

.filter-group label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--secondary-text);
}

.filter-group input, .filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    background-color: var(--bg);
    color: var(--primary-text);
    font-family: var(--font-secondary);
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: border-color 0.3s;
}

.filter-group input:focus, .filter-group select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Pagination — тонкие кнопки */
.pagination {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 4rem;
}

.pagination button {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--primary-text);
    padding: 8px 16px;
    cursor: pointer;
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s;
}

.pagination button:hover, .pagination button.active {
    background-color: var(--primary-text);
    color: var(--bg);
    border-color: var(--primary-text);
}

/* Product Detail — фокус на изображении и деталях */
.product-detail .container {
    max-width: 1200px;
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: start;
}

.product-image {
    position: sticky;
    top: 5rem;
    height: fit-content;
}

.product-image img {
    width: 100%;
    border: 1px solid var(--border);
}

.product-info {
    padding-top: 2rem;
}

.product-info h1 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.product-info .price {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--secondary-text);
    margin-bottom: 2rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.product-info .description {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    color: var(--primary-text);
}

.specs {
    margin-bottom: 3rem;
}

.specs p {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
    color: var(--secondary-text);
}

.specs p strong {
    color: var(--primary-text);
    margin-right: 0.5rem;
}

/* Cart — чистый, структурированный */
.cart .container {
    max-width: 900px;
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    align-items: center;
}

.cart-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 1px solid var(--border);
}

.cart-item-info h3 {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
}

.cart-item-info .price {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.cart-item-actions button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-text);
    transition: color 0.3s;
}

.cart-item-actions button:hover {
    color: #999;
}

.cart-summary {
    text-align: right;
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.cart-summary span {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    color: var(--primary-text);
    margin-left: 1rem;
}

/* Form — минималистичная форма */
#order-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 3rem 0;
    border-top: 1px solid var(--border);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--secondary-text);
}

.form-group input, .form-group textarea {
    padding: 12px;
    border: 1px solid var(--border);
    background-color: var(--bg);
    color: var(--primary-text);
    font-family: var(--font-secondary);
    font-size: 1rem;
    letter-spacing: 0.5px;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* FAQ — аккордеон в стиле Cartier */
.faq-item {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 2rem;
}

.faq-item h3 {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 300;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item p {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--primary-text);
}

/* Footer — тонкий, элегантный */
footer {
    background-color: var(--bg);
    padding: 6rem 0 3rem;
    border-top: 1px solid var(--border);
    color: var(--secondary-text);
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-column h4 {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    color: var(--primary-text);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.8rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero h2 {
        font-size: 2.8rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .product-image {
        position: static;
    }
}

@media (max-width: 768px) {
    header nav ul {
        gap: 1.5rem;
        font-size: 0.8rem;
    }

    .hero h2 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    section {
        padding: 4rem 0;
    }

    .products-grid, .category-grid {
        gap: 2rem;
    }

    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }

    .cart-item {
        grid-template-columns: 80px 1fr auto;
        gap: 1.5rem;
    }
}

/* Дополнительные стили для "Cartier-эффекта" */
.hero-content,
.product-info,
.cart,
.about,
.contacts {
    font-variant-ligatures: none;
    text-rendering: optimizeLegibility;
}

/* Плавные переходы для всего */
* {
    transition: background-color 0.3s, color 0.3s, border-color 0.3s, transform 0.3s;
}