:root {
    --color-primary: hsl(0, 0%, 95%);
    --color-primary-dark: hsl(0, 0%, 85%);
    --color-success: hsl(140, 70%, 55%);
    --color-background: hsl(0, 0%, 0%);
    --color-surface: hsl(216, 12%, 8%);
    --color-surface-light: hsl(220, 10%, 25%);
    --color-border: hsl(220, 10%, 30%);
    --color-text-primary: hsl(0, 0%, 98%);
    --color-text-secondary: hsl(220, 15%, 75%);
    --color-text-muted: hsl(220, 10%, 45%);
    --color-white: hsl(0, 0%, 10%);
    --gradient-primary: linear-gradient(120deg, var(--color-primary), var(--color-primary-dark));

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow-md: 0 8px 24px hsla(0, 0%, 0%, 0.3);
    --shadow-primary: 0 6px 20px hsla(0, 0%, 95%, 0.2);
    --shadow-primary-hover: 0 8px 25px hsla(0, 0%, 95%, 0.3);

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}


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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 8rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* --- GLOBALNE ULEPSZENIA --- */
a, button {
    transition: all var(--transition-fast);
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: 4px;
}

/* --- BREADCRUMB --- */
.breadcrumb {
    margin-top: 6rem;
    padding-bottom: var(--spacing-md);
}

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: var(--spacing-xs);
}

.breadcrumb__item {
    font-size: 0.9rem;
}

.breadcrumb__link {
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: var(--spacing-xs);
    border-radius: 4px;
}

.breadcrumb__link:hover {
    color: var(--color-primary);
    background-color: var(--color-surface-light);
}

.breadcrumb__separator {
    color: var(--color-text-muted);
}

.breadcrumb__item--current {
    color: var(--color-primary);
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.breadcrumb__item--current:hover {
    color: var(--color-primary-dark);
}

.product {
    padding: var(--spacing-xl) 0;
}

.product__wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--spacing-xl);
    align-items: start;
}

.product__gallery {
    position: sticky;
    top: 6rem;
}

.gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.gallery__main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: radial-gradient(circle, var(--color-surface-light) 0%, var(--color-surface) 100%);
    aspect-ratio: 1 / 1;
}

.gallery__main-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    cursor: zoom-in;
    transition: transform var(--transition-normal);
}

.gallery__main:hover .gallery__main-image {
    transform: scale(1.05);
}

.gallery__thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.gallery__thumbnail {
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid var(--color-border);
    opacity: 0.7;
}

.gallery__thumbnail:hover {
    opacity: 1;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.gallery__thumbnail--active {
    opacity: 1;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

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

.product__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.product__brand {
    color: var(--color-primary);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1.5px;
    font-size: 0.8rem;
}

.product__header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: calc(-1 * var(--spacing-sm)); /* Negative margin to pull tabs closer */
}

.product__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    text-shadow: 0 2px 10px hsla(0, 0%, 0%, 0.3);
}

.product__badge {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 99px;
    white-space: nowrap;
}

/* --- ZAKŁADKI (TABS) --- */
.tabs {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-surface);
}

.tabs__nav {
    display: flex;
    list-style: none;
    border-bottom: 1px solid var(--color-border);
}

.tabs__nav-item {
    padding: var(--spacing-sm) var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text-secondary);
    border-bottom: 3px solid transparent;
}

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

.tabs__nav-item--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tabs__content {
    padding: var(--spacing-lg);
    min-height: 150px;
}

.tabs__pane {
    display: none;
    animation: fadeIn 0.4s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.tabs__pane--active {
    display: block;
}

.product-description {
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.specs__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-sm);
}

.spec {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-surface-light);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

.spec__icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.spec__icon svg {
    width: 24px;
    height: 24px;
}

.spec__label {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

.spec__value {
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1rem;
}

.shipping {
    background: hsla(140, 70%, 55%, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
}
.no-specs-message {
     color: var(--color-text-secondary);
     padding: 2rem;
     text-align: center;
     background-color: var(--color-surface);
     border-radius: var(--radius);
 }

.shipping__text {
    color: var(--color-success);
    font-weight: 600;
    font-size: 0.9rem;
}

.size-selector__title {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.size-selector__options {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.size-option {
    background: var(--color-surface-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    min-width: 80px;
    text-align: center;
}

.size-option:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.size-option--selected {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-primary);
}

.trust-seals {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
}

.trust-seal {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    text-align: center;
}
/* --- Style dla statusu magazynowego --- */
.stock-status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin: 1rem 0;
}

.stock-status__label {
    color: var(--color-text-secondary);
    font-weight: 500;
}

.stock-status__value {
    font-weight: 700;
    font-size: 1.1rem;
}

.stock--in-stock {
    color: var(--color-success);
}
.stock--low {
    color: var(--color-primary);
}
.stock--out-of-stock {
    color: var(--color-danger);
}

.button:disabled {
    background: var(--color-surface-light);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    color: var(--color-text-secondary);
}
.button:disabled:hover {
    background: var(--color-surface-light);
}
.trust-seal svg {
    width: 24px;
    height: 24px;
    color: var(--color-success);
}

.purchase-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.purchase-box__price-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-md);
}

.purchase-box__price-label {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.purchase-box__price-wrapper {
    justify-content: space-between;
    align-items: baseline;
}

.purchase-box__current-price {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.purchase-box__price-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.purchase-box__original-price {
    font-size: 1.1rem;
    text-decoration: line-through;
    color: var(--color-text-muted);
}

.purchase-box__price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
}

.purchase-box__actions {
    display: flex;
    gap: var(--spacing-md);
}

.quantity {
    display: flex;
    border: 1px solid var(--color-border);
}

.quantity__btn {
    border: none;
    background-color: var(--color-surface-light);
    color: var(--color-text-primary);
    width: 45px;
    font-size: 1.2rem;
}

.quantity__btn:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.quantity__input {
    color: var(--color-text-primary);
    background-color: transparent;
    border: none;
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
    width: 50px;
    -moz-appearance: textfield;
}

.quantity__input::-webkit-outer-spin-button,
.quantity__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.quantity-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.quantity-info {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}
.add-to-cart {
    flex-grow: 1;
    border: none;
    background: var(--gradient-primary);
    font-family: inherit;
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    min-height: 58px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 700;
    font-size: 0.85rem;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.add-to-cart:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary-hover);
}

.add-to-cart:active {
    transform: translateY(-1px);
}

.add-to-cart__icon {
    width: 20px;
    height: 20px;
}

/* --- MODAL --- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background-color: hsla(0, 0%, 0%, 0.7);
    backdrop-filter: blur(8px);
}

.modal__wrapper {
    width: min(650px, 90vw);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2001;
}

.modal__close {
    position: absolute;
    top: -2.5rem;
    right: -1.5rem;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--color-white);
    z-index: 2002;
}

.modal__close:hover {
    transform: scale(1.1) rotate(90deg);
    color: var(--color-primary);
}
.product__promo-box {
    background-color: var(--color-primary-glow);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 500;
}
.promo-code {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: monospace;
}
.pricing__discount {
    background-image: var(--gradient-primary);
    color: var(--color-white);
    padding: 0.3rem 0.8rem;
    font-size: 0.9rem;
    font-weight: 700;
    border-radius: 99px;
    text-shadow: 0 1px 2px hsla(0, 0%, 0%, 0.2);
    box-shadow: 0 2px 8px hsla(32, 98%, 51%, 0.25);
    transform: rotate(-2deg);
    animation: pulse-discount 2s infinite ease-in-out;
}

@keyframes pulse-discount {
    0%, 100% {
        transform: scale(1) rotate(-2deg);
    }
    50% {
        transform: scale(1.05) rotate(-2deg);
    }
}

.no-specs-message {
    color: var(--color-text-secondary);
    text-align: center;
    padding: var(--spacing-lg) 0;
    font-style: italic;
}

.product-rating-summary {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.stars { display: inline-flex; color: #ccc; }
.stars svg { width: 20px; height: 20px; }
.stars svg.is-filled { color: #f39c12; fill: #f39c12; }
.rating-count { color: var(--color-text-secondary); font-size: 0.9rem; text-decoration: none; }
.rating-count:hover { text-decoration: underline; }

.reviews-section {
    padding: 4rem 0;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.reviews-summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: flex-start;
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--color-border);
}

.review-overview__score {
    font-size: var(--font-size-xxl);
    font-weight: 800;
    line-height: 1;
    padding-bottom: 0.5rem;
}

.review-overview__based-on {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-top: 0.5rem;
}

.review-cta-box {
    background-color: var(--color-surface-light);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.review-cta-box h3 { margin: 0 0 0.5rem 0; color: var(--color-text-primary); }
.review-cta-box p { margin: 0 0 1.5rem 0; color: var(--color-text-secondary); }
.review-cta-box__info { color: var(--color-text-secondary); font-size: 0.9rem; }

.review-form-wrapper {
    background-color: var(--color-surface-light);
    padding: 2rem;
    border-radius: var(--radius);
    margin: 3rem 0;
    border: 1px solid var(--color-border);
}
.review-form-wrapper h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: var(--font-size-lg);
}
#review-form .form-group {
    margin-bottom: 1.5rem;
}
#review-form .form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

#review-form .form-input {
    width: 100%;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.8rem 1rem;
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}
#review-form .form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

#review-form textarea.form-input {
    resize: vertical;
    min-height: 120px;
}
.rating-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.star-rating {
    display: inline-flex;
    flex-direction: row-reverse;
    font-size: 2.5rem;
    line-height: 1;
}
.star-rating input { display: none; }
.star-rating label {
    color: var(--color-surface-light);
    -webkit-text-stroke: 1px var(--color-text-secondary);
    cursor: pointer;
    transition: color 0.2s, -webkit-text-stroke 0.2s;
}
.star-rating input:checked ~ label,
.star-rating:not(:checked) > label:hover,
.star-rating:not(:checked) > label:hover ~ label {
    color: var(--color-primary);
    -webkit-text-stroke: 1px var(--color-primary);
}
#review-form .button {
    margin-top: 1rem;
}
.reviews-list h3 {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
}
.review-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-surface-light);
}
.review-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.review-item:nth-child(odd) {
    background-color: var(--color-surface);
}
.review-item__body {
    padding-bottom: 1rem;
}
.review-item__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.author-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--color-background);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.author-name {
    color: var(--color-text-primary);
}

.verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-success);
    background-color: var(--color-success-glow);
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
}
.verified-badge svg { width: 14px; height: 14px; }

.review-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    flex-shrink: 0;
}

.review-date {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.review-item__body p {
    margin: 0;
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding-left: calc(36px + 0.75rem);
}

.stars {
    display: inline-flex;
    color: var(--color-border);
}
.stars svg {
    width: 18px;
    height: 18px;
}
.stars svg.is-filled {
    color: var(--color-primary);
    fill: var(--color-primary);
}

@media (max-width: 768px) {
    .reviews-summary-grid {
        grid-template-columns: 1fr;
    }
    .review-item__header {
        flex-direction: column;
        align-items: flex-start;
    }
    .review-meta {
        flex-direction: row;
        width: 100%;
        justify-content: space-between;
    }
    .review-item__body p {
        padding-left: 0;
    }
}
@media (max-width: 1024px) {

    .product__wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .product__gallery {
        position: static;
        max-width: 600px;
        margin: 0 auto;
    }

    .modal__close {
        top: -3rem;
        right: 0;
        background-color: hsla(0, 0%, 0%, 0.5);
        border-radius: 50%;
        width: 2.5rem;
        height: 2.5rem;
        display: grid;
        place-items: center;
    }
}


@media (max-width: 768px) {
    .product__wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .product__gallery {
        position: static;
        max-width: 100%;
        margin: 0 auto;
    }

    .gallery__main {
        aspect-ratio: auto;
        max-height: 700px;
        background: transparent;
    }

    .gallery__main-image {
        object-fit: contain;
        width: 100%;
        height: auto;
    }

    .gallery__thumbnails {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    }

    .purchase-box__actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .quantity-wrapper {
        width: 100%;
        justify-content: space-between;
    }

    .add-to-cart {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }

    .product__title {
        font-size: 1.5rem;
    }

    .purchase-box {
        padding: var(--spacing-md);
    }

    .gallery__thumbnails {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xs);
    }

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