/* =========================================
   БАННЕР ТОВАРА
   ========================================= */
.product-banner {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    width: 100%;
    position: relative;
    background-color: #f5f5f5;
    padding: 40px 0;
}

.product-banner__container {
    display: flex;
    height: 520px;
    max-height: 520px;
    overflow: hidden;
    position: relative;
    border-radius: 0;
    max-width: 1164px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Слайдер */
.product-banner__slider {
    width: 50%;
    position: relative;
    overflow: hidden;
    background: #2a2a2a;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.product-banner__slider-track {
    display: flex;
    transition: transform 0.6s ease-in-out;
    width: 100%;
    height: 100%;
}

.product-banner__slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.product-banner__image {
    max-width: 85%;
    max-height: 85%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    cursor: zoom-in;
    transition: transform 0.3s ease;
}

.product-banner__image:hover {
    transform: scale(1.02);
}

/* Стрелки слайдера */
.product-banner__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.product-banner__arrow:hover {
    background: rgba(0, 0, 0, 0.7);
    transform: translateY(-50%) scale(1.05);
}

.product-banner__arrow--prev { left: 16px; }
.product-banner__arrow--next { right: 16px; }

/* Контент баннера */
.product-banner__content {
    width: 50%;
    padding: 40px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    position: relative;
    z-index: 2;
    height: 100%;
    background: #c83030;
}

.product-banner__title {
    font-size: 38px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.product-banner__size {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 24px;
    font-weight: 400;
}

.product-banner__features {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.product-banner__feature {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
}

.product-banner__check {
    background: #4CAF50;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    flex-shrink: 0;
}

.product-banner__description {
    font-size: 15px;
    line-height: 1.5;
    opacity: 0.95;
    margin-bottom: 32px;
    max-width: 400px;
}

.product-banner__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.product-banner__btn {
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-decoration: none;
    display: inline-block;
}

.product-banner__btn--primary {
    background: #E53E3E;
    color: white;
}

.product-banner__btn--primary:hover {
    background: #C53030;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(229, 62, 62, 0.4);
}

.product-banner__btn--secondary {
    background: white;
    color: #1a1a1a;
}

.product-banner__btn--secondary:hover {
    background: #f5f5f5;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* =========================================
   ЛАЙТБОКС (ПОЛНОЭКРАННЫЙ ПРОСМОТР)
   ========================================= */
.product-lightbox {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.product-lightbox--active {
    opacity: 1;
    visibility: visible;
}

.product-lightbox__overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
}

.product-lightbox__container {
    position: relative;
    width: 100%; height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.product-lightbox__close {
    position: absolute;
    top: 24px; right: 24px;
    width: 48px; height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    transition: background 0.3s;
}

.product-lightbox__close:hover {
    background: rgba(255, 255, 255, 0.25);
}

.product-lightbox__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 52px; height: 52px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    transition: all 0.3s;
}

.product-lightbox__arrow:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-50%) scale(1.05);
}

.product-lightbox__arrow--prev { left: 24px; }
.product-lightbox__arrow--next { right: 24px; }

.product-lightbox__image-wrapper {
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
}

.product-lightbox__image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}

/* =========================================
   ОПИСАНИЕ И ЦЕНА ТОВАРА
   ========================================= */
.product-details {
    background-color: #f5f5f5;
    padding: 0 0 80px;
}

.product-details__container {
    max-width: 1164px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-details__header {
    text-align: center;
    margin-bottom: 48px;
}

.product-details__price {
    display: inline-block;
    font-size: 48px;
    font-weight: 900;
    color: #c83030;
    margin-bottom: 8px;
    line-height: 1;
}

.product-details__subtitle {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #888;
    margin-bottom: 12px;
    font-weight: 600;
}

.product-details__title {
    font-size: 26px;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 20px;
    line-height: 1.3;
}

.product-details__intro {
    max-width: 720px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.6;
    color: #444;
}

/* =========================================
   ХАРАКТЕРИСТИКИ ТОВАРА (единый блок)
   ========================================= */
.product-details__characteristics-wrapper {
    margin-bottom: 48px;
}

.product-details__characteristics {
    background: #fff;
    padding: 32px 40px;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.05);
    color: #333;
    line-height: 1.6;
    font-size: 15px;
}

.product-details__characteristics h3 {
    font-size: 20px;
    font-weight: 700;
    color: #c83030;
    margin: 0 0 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f0f0;
}

.product-details__characteristics p {
    margin: 0 0 16px;
    color: #444;
}

.product-details__characteristics p:last-child {
    margin-bottom: 0;
}

.product-details__characteristics ul,
.product-details__characteristics ol {
    margin: 0 0 20px 24px;
    padding: 0;
}

.product-details__characteristics ul {
    list-style: disc;
}

.product-details__characteristics ol {
    list-style: decimal;
}

.product-details__characteristics li {
    margin-bottom: 8px;
    padding-left: 4px;
    color: #444;
}

.product-details__characteristics li:last-child {
    margin-bottom: 0;
}

.product-details__characteristics strong {
    color: #1a1a1a;
    font-weight: 600;
}

.product-details__characteristics em {
    color: #666;
    font-style: italic;
}

.product-details__characteristics hr {
    border: none;
    border-top: 1px solid #eee;
    margin: 24px 0;
}

.product-details__characteristics blockquote {
    margin: 20px 0;
    padding: 16px 24px;
    background: #fafafa;
    border-left: 4px solid #c83030;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #555;
}

.product-details__actions {
    text-align: center;
}

.product-details__actions .product-banner__btn {
    min-width: 280px;
    font-size: 16px;
    padding: 16px 32px;
}

/* =========================================
   АДАПТИВНОСТЬ
   ========================================= */
@media (max-width: 1199px) {
    .product-banner__container { max-width: 960px; }
    .product-banner__title { font-size: 32px; }
}

@media (max-width: 968px) {
    .product-banner__container {
        flex-direction: column;
        height: auto;
        max-height: none;
        overflow: visible;
    }
    
    .product-banner__slider {
        width: 100%;
        height: 350px;
    }
    
    .product-banner__content {
        width: 100%;
        padding: 40px 30px;
        height: auto;
    }
    
    .product-banner__title { font-size: 28px; }
    .product-banner__features { justify-content: center; }
    
    .product-banner__actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .product-banner__btn { width: 100%; }
}

@media (max-width: 768px) {
    .product-banner__slider { height: 280px; }
    .product-banner__features { flex-direction: column; align-items: center; }
    .product-banner__title { font-size: 26px; }
    .product-details__title { font-size: 22px; }
    .product-details__price { font-size: 40px; }
    
    .product-lightbox__arrow { width: 40px; height: 40px; font-size: 18px; }
    .product-lightbox__arrow--prev { left: 12px; }
    .product-lightbox__arrow--next { right: 12px; }
    
    .product-details__characteristics {
        padding: 24px 20px;
        font-size: 14px;
    }
    
    .product-details__characteristics h3 {
        font-size: 18px;
        margin-bottom: 20px;
    }
    
    .product-details__characteristics ul,
    .product-details__characteristics ol {
        margin-left: 20px;
    }
}

@media (max-width: 480px) {
    .product-banner { padding: 20px 0; }
    .product-banner__slider { height: 220px; }
    .product-banner__content { padding: 30px 20px; }
    .product-banner__title { font-size: 24px; }
    .product-banner__description { font-size: 14px; }
    .product-details__price { font-size: 32px; }
    
    .product-banner__arrow { width: 36px; height: 36px; font-size: 14px; }
    .product-banner__arrow--prev { left: 10px; }
    .product-banner__arrow--next { right: 10px; }
}