/* ===== PRODUCT SECTION ===== */
.product-section {
    background-color: var(--color-bg-dark);
    padding: 80px 0 100px;
    position: relative;
}

.product-section::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 60px 60px; pointer-events: none;
}

.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
    position: relative; z-index: 1;
}

/* ===== GALLERY ===== */
.product-gallery { position: sticky; top: 40px; }

.product-gallery__main {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: 2px;
    background-color: #2a2a2a;
    border: 1px solid rgba(255,255,255,0.06);
    margin-bottom: 12px;
}

.product-gallery__img {
    width: 100%; height: 100%;
    object-fit: cover; display: block;
    transition: transform 0.6s cubic-bezier(0.16,1,0.3,1);
}

.product-gallery__main:hover .product-gallery__img { transform: scale(1.04); }

.product-gallery__thumbs { display: flex; gap: 10px; flex-wrap: wrap; }

.product-gallery__thumb {
    width: 72px; height: 72px;
    border-radius: 2px; overflow: hidden;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.08);
    transition: border-color 0.3s ease;
    flex-shrink: 0;
}

.product-gallery__thumb img {
    width: 100%; height: 100%;
    object-fit: cover; display: block;
    transition: transform 0.3s ease;
}

.product-gallery__thumb:hover { border-color: rgba(201,164,92,0.4); }
.product-gallery__thumb:hover img { transform: scale(1.08); }
.product-gallery__thumb--active { border-color: var(--color-accent); }
.product-gallery__placeholder { width: 100%; height: 100%; background-color: #3a3a3a; }

/* ===== PRODUCT INFO ===== */
.product-info { padding-top: 8px; }

.product-info__category {
    font-size: 11px; letter-spacing: 2px;
    color: var(--color-accent); text-transform: uppercase; margin-bottom: 16px;
}

.product-info__title { font-size: 32px; font-weight: bold; line-height: 1.2; margin-bottom: 24px; }

.product-info__price {
    font-size: 28px; font-weight: bold; color: var(--color-accent);
    margin-bottom: 32px; padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.product-info__price--request { font-size: 18px; color: var(--color-text-muted); font-weight: normal; }
.product-info__desc { font-size: 15px; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 36px; }

/* ===== SPECS ===== */
.product-info__specs { margin-bottom: 40px; }

.product-specs { display: flex; flex-direction: column; }

.product-spec {
    display: flex; align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.product-spec:first-child { border-top: 1px solid rgba(255,255,255,0.06); }
.product-spec__label { font-size: 13px; color: var(--color-text-muted); }
.product-spec__value { font-size: 14px; font-weight: bold; color: var(--color-text-light); }

/* ===== SPECS TOGGLE ===== */
.specs-toggle {
    display: flex; align-items: center; gap: 8px;
    background: none; border: none;
    color: var(--color-accent); font-size: 13px;
    cursor: pointer; font-family: var(--font-main);
    padding: 12px 0; letter-spacing: 0.5px;
    transition: opacity 0.2s ease;
}

.specs-toggle:hover { opacity: 0.8; }
.specs-toggle__arrow { transition: transform 0.4s ease; flex-shrink: 0; }
.specs-toggle.is-open .specs-toggle__arrow { transform: rotate(180deg); }

.specs-extra { max-height: 0; overflow: hidden; transition: max-height 0.5s cubic-bezier(0.16,1,0.3,1); }
.specs-extra.is-open { max-height: 400px; }

/* ===== CALCULATOR ===== */
.product-calc {
    margin-bottom: 32px;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 4px; padding: 28px; position: relative;
}

.product-calc::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, rgba(201,164,92,0.5), rgba(201,164,92,0));
    border-radius: 4px 4px 0 0;
}

.product-calc__title { font-size: 11px; letter-spacing: 2px; color: var(--color-text-muted); margin-bottom: 20px; }

.calc-tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,0.08); }

.calc-tab {
    background: none; border: none;
    padding: 10px 16px; font-size: 13px;
    color: var(--color-text-muted); cursor: pointer;
    font-family: var(--font-main);
    border-bottom: 2px solid transparent; margin-bottom: -1px;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.calc-tab:hover { color: var(--color-text-light); }
.calc-tab--active { color: var(--color-accent); border-bottom-color: var(--color-accent); }

.calc-panel { display: none; }
.calc-panel--active { display: block; }

.calc-inputs { display: flex; align-items: flex-end; gap: 12px; margin-bottom: 20px; }
.calc-input-group { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.calc-label { font-size: 11px; letter-spacing: 1px; color: var(--color-accent); text-transform: uppercase; }

.calc-input {
    width: 100%;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 2px; padding: 12px 16px;
    font-size: 16px; color: var(--color-text-light);
    font-family: var(--font-main); outline: none;
    transition: border-color 0.3s ease;
}

.calc-input:focus { border-color: rgba(201,164,92,0.5); }
.calc-multiply { font-size: 20px; color: var(--color-text-muted); padding-bottom: 12px; flex-shrink: 0; }

.calc-unit-switch { display: flex; gap: 8px; margin-bottom: 20px; }

.calc-unit-btn {
    display: flex; align-items: center; gap: 6px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 2px; color: var(--color-text-muted);
    font-size: 12px; cursor: pointer;
    font-family: var(--font-main);
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.calc-unit-btn:hover { border-color: rgba(201,164,92,0.4); color: var(--color-text-light); }
.calc-unit-btn--active { border-color: var(--color-accent); color: var(--color-accent); background: rgba(201,164,92,0.06); }

.calc-counter { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }

.calc-counter__btn {
    width: 40px; height: 40px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 2px; color: var(--color-text-light);
    font-size: 20px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: border-color 0.2s ease, color 0.2s ease;
    font-family: var(--font-main);
}

.calc-counter__btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.calc-counter__val { font-size: 24px; font-weight: bold; min-width: 40px; text-align: center; }
.calc-counter__unit { font-size: 14px; color: var(--color-text-muted); }

.calc-result {
    background: rgba(201,164,92,0.04);
    border: 1px solid rgba(201,164,92,0.15);
    border-radius: 2px; padding: 16px;
    display: flex; flex-direction: column; gap: 10px;
}

.calc-result__row { display: flex; justify-content: space-between; align-items: center; }
.calc-result__label { font-size: 13px; color: var(--color-text-muted); }
.calc-result__value { font-size: 15px; font-weight: bold; }
.calc-result__value--accent { color: var(--color-accent); font-size: 17px; }

/* ===== ACTIONS ===== */
.product-actions { display: flex; gap: 16px; align-items: center; }

.product-add-cart {
    flex: 1; padding: 18px; font-size: 13px;
    letter-spacing: 2px; border: none; cursor: pointer; text-align: center;
}

/* ===== RELATED ===== */
.related-section { background-color: var(--color-bg-darker); padding: 80px 0; }

.related-section .product-card {
    opacity: 1 !important;
    transform: none !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .product-layout { grid-template-columns: 1fr; gap: 40px; }
    .product-gallery { position: static; }
    .product-info__title { font-size: 24px; }
    .product-info__price { font-size: 22px; }
}

@media (max-width: 599px) {
    .product-section { padding: 40px 0 60px; }
    .product-layout { gap: 28px; }
    .product-info__title { font-size: 20px; margin-bottom: 16px; }
    .product-info__price { font-size: 20px; margin-bottom: 20px; padding-bottom: 20px; }
    .product-info__desc { font-size: 13px; }

    .product-spec { padding: 10px 0; }
    .product-spec__label { font-size: 12px; }
    .product-spec__value { font-size: 12px; }

    .product-calc { padding: 20px 16px; }
    .calc-tab { font-size: 12px; padding: 8px 12px; }
    .calc-input { padding: 10px 12px; font-size: 14px; }
    .calc-inputs { gap: 8px; }
    .calc-multiply { font-size: 16px; }
    .calc-unit-btn { font-size: 11px; padding: 6px 10px; }
    .calc-counter__val { font-size: 20px; }
    .calc-counter__unit { font-size: 12px; }
    .calc-result__label { font-size: 12px; }
    .calc-result__value { font-size: 13px; }
    .calc-result__value--accent { font-size: 15px; }

    .product-actions { flex-direction: column; gap: 10px; }
    .product-add-cart { width: 100%; padding: 14px; font-size: 12px; }
    .product-actions .btn--outline { width: 100%; text-align: center; padding: 12px; }

    .product-gallery__thumb { width: 56px; height: 56px; }

    .related-section { padding: 48px 0; }
}