/* ============================================================
   ALPACA RANTIYKUY — product.css
   Paleta: azul primario + naranja acento (igual que admin)
   ============================================================ */

:root {
    /* Blues - paleta principal */
    --primary-100: #dce8f5;
    --primary-200: #7FA3C7;
    --primary-300: #5F93C6;
    --primary-400: #3F83C5;
    --primary-500: #1F63A4;
    --primary-600: #174e83;
    --primary-700: #0f3560;

    /* Acento naranja */
    --accent:       #FF7A00;
    --accent-hover: #FF9A3C;
    --accent-soft:  rgba(255,122,0,.1);

    /* Terracota / colores cálidos de marca */
    --terracotta:   #b56b45;
    --terra-light:  rgba(181,107,69,.1);
    --earth:        #102A43;
    --ocre:         #d4a96a;
    --sand:         #F0F4F8;

    /* Fondos */
    --bg-page:    #EFF3F8;
    --bg-surface: #ffffff;
    --bg-subtle:  #F0F4F8;
    --bg-muted:   #e4eaf2;

    /* Texto */
    --dark:           #102A43;
    --text-primary:   #102A43;
    --text-secondary: #2d4a63;
    --text-muted:     #627D98;
    --text-faint:     #9ab0c7;

    /* Bordes */
    --line:         rgba(31,99,164,.12);
    --border:       rgba(31,99,164,.12);
    --border-hover: rgba(31,99,164,.35);
    --muted:        #627D98;

    /* Sombras */
    --shadow-soft: 0 4px 16px rgba(16,42,67,.10);
    --shadow-card: 0 12px 28px rgba(16,42,67,.14);
    --shadow-xs:   0 1px 4px rgba(16,42,67,.07);
    --shadow-sm:   0 4px 12px rgba(16,42,67,.09);
    --shadow-md:   0 8px 24px rgba(16,42,67,.12);
    --shadow-lg:   0 16px 40px rgba(16,42,67,.15);
    --shadow-xl:   0 24px 56px rgba(16,42,67,.18);
    --shadow-accent: 0 8px 24px rgba(255,122,0,.25);

    /* Forma */
    --radius-sm:   8px;
    --radius-md:   14px;
    --radius-lg:   22px;
    --radius-xl:   32px;
    --radius-full: 9999px;

    /* Animaciones */
    --ease-out:    cubic-bezier(.16,1,.3,1);
    --ease-spring: cubic-bezier(.34,1.56,.64,1);
    --transition:  all .25s var(--ease-out);
    --transition-fast: 150ms var(--ease-out);
    --transition-base: 250ms var(--ease-out);
    --transition-slow: 400ms var(--ease-out);

    /* White */
    --white: #ffffff;
}

/* ============================================================
   RESET Y BASE
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: "Montserrat", sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

h1, h2, h3, h4, .logo {
    font-family: "Cormorant Garamond", Georgia, serif;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

:focus-visible {
    outline: 2.5px solid var(--primary-400);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: linear-gradient(160deg, var(--primary-700) 0%, var(--primary-500) 55%, var(--primary-400) 100%);
    border-bottom: 1px solid rgba(255,255,255,.06);
    box-shadow: 0 4px 28px rgba(7,25,41,.32), 0 1px 0 rgba(255,255,255,.07) inset;
    backdrop-filter: blur(12px);
}

.header-inner {
    width: min(1280px, 92%);
    margin: 0 auto;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 700;
    color: #f0f6ff;
    letter-spacing: .4px;
    transition: color var(--transition-fast);
}
.logo span { color: var(--accent); }
.logo:hover { color: var(--accent-hover); }

.top-nav { display: flex; align-items: center; gap: 4px; }

.top-nav a {
    color: rgba(240,246,255,.72);
    font-weight: 600;
    font-size: .88rem;
    letter-spacing: .02em;
    padding: 7px 14px;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.top-nav a:hover {
    background: rgba(255,255,255,.07);
    color: #fff;
    border-color: rgba(255,255,255,.08);
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb-wrap {
    width: min(1280px, 92%);
    margin: 0 auto;
    padding: 16px 0 6px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    color: var(--text-muted);
    font-size: .83rem;
    font-weight: 500;
}
.breadcrumb-wrap a {
    color: var(--primary-500);
    font-weight: 600;
    transition: color var(--transition-fast);
}
.breadcrumb-wrap a:hover { color: var(--primary-400); }

/* ============================================================
   PAGINA
   ============================================================ */
.product-body { min-height: 100vh; }

.product-page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 20px 72px;
}

/* ============================================================
   STATE BOX
   ============================================================ */
.state-box {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 56px 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    animation: fadeUp .4s var(--ease-out) both;
}
.state-title {
    font-size: 2.2rem;
    margin-bottom: 12px;
    color: var(--primary-500);
}
.state-box p { color: var(--text-muted); line-height: 1.8; }
.state-error { border-color: rgba(181,107,69,.3); }

/* ============================================================
   PRODUCT DETAIL — grid principal
   ============================================================ */
.product-detail {
    display: grid;
    grid-template-columns: 1.08fr .92fr;
    gap: 28px;
    align-items: start;
    animation: fadeUp .45s var(--ease-out) both;
}
.product-left, .product-right { min-width: 0; }

/* ============================================================
   GALERIA
   ============================================================ */
.gallery-shell {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 18px;
    box-shadow: var(--shadow-card);
    transition: box-shadow var(--transition-base);
}
.gallery-shell:hover { box-shadow: var(--shadow-xl); }

.gallery-grid {
    display: grid;
    grid-template-columns: 88px minmax(0,1fr);
    gap: 14px;
    align-items: start;
}

.thumbs-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 540px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-200) transparent;
}
.thumbs-container::-webkit-scrollbar { width: 4px; }
.thumbs-container::-webkit-scrollbar-thumb {
    background: var(--primary-200);
    border-radius: var(--radius-full);
}

.thumb-btn {
    border: 2px solid transparent;
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    padding: 0;
    flex: 0 0 auto;
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: var(--shadow-xs);
}
.thumb-btn:hover {
    border-color: var(--primary-300);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}
.thumb-btn.active {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(31,99,164,.18);
}
.thumb-btn img { width: 100%; height: 82px; object-fit: cover; }

.main-gallery-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #fff 0%, #f5f8fc 100%);
    border-radius: calc(var(--radius-lg) - 2px);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}

.gallery-badges {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
}

/* Badge con pulso animado */
.stock-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 14px;
    border-radius: var(--radius-full);
    font-size: .73rem;
    font-weight: 700;
    letter-spacing: .05em;
    backdrop-filter: blur(8px);
    background: rgba(16,42,67,.85);
    color: #fff;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-base);
}
.stock-badge::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    opacity: .9;
    flex-shrink: 0;
}
.stock-badge.is-in  { background: rgba(22,101,52,.9);  color: #d1fae5; }
.stock-badge.is-in::before  { animation: pulse-green 2s infinite; }
.stock-badge.is-low { background: rgba(181,107,69,.92); color: #fff4e0; }
.stock-badge.is-low::before { animation: pulse-amber 1.4s infinite; }
.stock-badge.is-out { background: rgba(90,90,100,.88);  color: #fff; }
.stock-badge.is-out::before { opacity: .35; }
.stock-badge.is-neutral { background: rgba(16,42,67,.78); color: rgba(255,255,255,.8); }

@keyframes pulse-green {
    0%,100% { box-shadow: 0 0 0 0 rgba(34,197,94,.55); }
    50%      { box-shadow: 0 0 0 5px rgba(34,197,94,.0); }
}
@keyframes pulse-amber {
    0%,100% { box-shadow: 0 0 0 0 rgba(255,160,50,.55); }
    50%      { box-shadow: 0 0 0 5px rgba(255,160,50,.0); }
}

.main-product-image {
    width: 100%;
    height: 540px;
    object-fit: cover;
    display: block;
    background: #eaf0f7;
    touch-action: pan-y;
    user-select: none;
    transition: transform .4s var(--ease-out), opacity .2s ease;
    border-radius: calc(var(--radius-lg) - 3px);
}
.main-product-image:hover { transform: scale(1.022); }
.main-product-image.image-switching { opacity: .65; transform: scale(.984); }

/* ============================================================
   PANEL DE COMPRA
   ============================================================ */
.purchase-panel {
    background: #fff;
    border: 1px solid rgba(31,99,164,.10);
    border-radius: var(--radius-xl);
    padding: 34px 32px;
    box-shadow: 0 20px 56px rgba(7,25,41,.12);
    position: sticky;
    top: 86px;
    transition: box-shadow var(--transition-base);
}
.purchase-panel:hover { box-shadow: 0 28px 72px rgba(7,25,41,.18); }

.purchase-category {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--primary-400);
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 7px;
}
.purchase-category::before {
    content: '';
    width: 16px;
    height: 2px;
    background: var(--primary-400);
    border-radius: 2px;
    flex-shrink: 0;
}

.product-name {
    font-size: clamp(1.9rem, 3vw, 2.7rem);
    line-height: 1.05;
    color: var(--earth);
    margin-bottom: 4px;
}

/* Precio */
.purchase-price-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
    margin-top: 18px;
    padding: 18px 22px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-50, #EBF3FB) 0%, rgba(208,229,245,.50) 100%);
    border: 1px solid rgba(31,99,164,.14);
}
.price-block { display: flex; flex-direction: column; gap: 4px; }
.price-label {
    font-size: .71rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--text-muted);
    font-weight: 700;
}
.product-price {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--primary-500);
    line-height: 1;
    letter-spacing: -.02em;
}

/* Tags */
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.meta-chip {
    display: inline-flex;
    align-items: center;
    padding: 5px 13px;
    border-radius: var(--radius-full);
    background: var(--primary-100);
    border: 1px solid rgba(31,99,164,.18);
    color: var(--primary-600);
    font-size: .78rem;
    font-weight: 600;
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.meta-chip:hover {
    background: var(--primary-200);
    color: var(--primary-700);
    transform: translateY(-1px);
}

.product-description {
    line-height: 1.78;
    color: var(--text-muted);
    font-size: .93rem;
    margin-bottom: 18px;
}

/* Trust items */
.purchase-trust {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 10px;
    margin-bottom: 20px;
}
.trust-item {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 13px 14px;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
    cursor: default;
}
.trust-item:hover {
    background: var(--primary-100);
    border-color: rgba(31,99,164,.25);
    transform: translateY(-1px);
}
.trust-item strong {
    display: block;
    color: var(--primary-500);
    font-size: .85rem;
    margin-bottom: 3px;
}
.trust-item span {
    color: var(--text-muted);
    font-size: .8rem;
    line-height: 1.55;
}

/* Pill de stock */
.selection-stock-pill {
    display: inline-flex;
    align-items: center;
    padding: 5px 13px;
    border-radius: var(--radius-full);
    background: rgba(125,90,80,.08);
    color: var(--earth);
    font-size: .78rem;
    font-weight: 700;
    white-space: nowrap;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.selection-stock-pill.is-in  { background: var(--primary-100); color: var(--primary-600); }
.selection-stock-pill.is-low { background: rgba(255,160,50,.12); color: #b36a00; }
.selection-stock-pill.is-out { background: rgba(120,120,120,.08); color: #777; }
.selection-stock-pill.is-neutral { background: rgba(125,90,80,.08); color: var(--muted); }

/* ============================================================
   SECCIONES DE OPCIONES
   ============================================================ */
.product-section { margin-bottom: 20px; }

.section-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}
.section-label {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--text-muted);
    font-weight: 700;
}
.section-hint {
    color: var(--primary-500);
    font-size: .8rem;
    font-weight: 600;
}

.option-group { display: flex; flex-wrap: wrap; gap: 8px; }
.option-group-colors { gap: 12px; }

/* Color card */
.color-card {
    border: 2px solid var(--border);
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 6px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: center;
    width: 86px;
    min-width: 86px;
    box-shadow: var(--shadow-xs);
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}
.color-card:hover {
    border-color: var(--primary-300);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.color-card.active {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(31,99,164,.15), var(--shadow-sm);
    transform: translateY(-2px);
}
.color-card-thumb {
    width: 70px;
    height: 80px;
    border-radius: 9px;
    overflow: hidden;
    background: var(--bg-subtle);
}
.color-card-image { width: 100%; height: 100%; object-fit: cover; }
.color-card-label {
    font-size: .7rem;
    font-weight: 700;
    color: var(--dark);
    text-align: center;
    line-height: 1.2;
}

/* Botones de talla */
.option-btn {
    border: 1.5px solid var(--border);
    background: var(--white);
    border-radius: var(--radius-full);
    padding: 9px 18px;
    cursor: pointer;
    font-family: "Montserrat", sans-serif;
    font-weight: 700;
    font-size: .84rem;
    color: var(--dark);
    min-width: 56px;
    transition: border-color var(--transition-fast), background var(--transition-fast),
                color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.option-btn:hover:not(:disabled) {
    border-color: var(--primary-400);
    background: var(--primary-100);
    color: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.option-btn.active {
    background: var(--primary-500);
    color: #fff;
    border-color: var(--primary-500);
    box-shadow: 0 4px 14px rgba(31,99,164,.3);
}
.option-btn.disabled {
    opacity: .38;
    cursor: not-allowed;
    text-decoration: line-through;
}

/* ============================================================
   ESTADO DE VARIANTE
   ============================================================ */
.compact-status-grid { margin: 16px 0 18px; }
.variant-status-grid {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 10px;
}
.variant-status-box {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 13px 14px;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}
.variant-status-box:hover {
    background: var(--primary-100);
    border-color: rgba(31,99,164,.2);
}
.variant-status-label {
    display: block;
    color: var(--text-muted);
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    margin-bottom: 6px;
    font-weight: 700;
}
.stock-message, .sku-display {
    color: var(--earth);
    font-size: .92rem;
    font-weight: 600;
}
.stock-message.in-stock   { color: #16653b; }
.stock-message.low-stock  { color: #b36a00; }
.stock-message.out-of-stock { color: #a33025; }

/* ============================================================
   FILA DE COMPRA
   ============================================================ */
.purchase-row {
    display: grid;
    grid-template-columns: 112px minmax(0,1fr);
    gap: 12px;
    align-items: end;
    margin-top: 6px;
}
.quantity-box { display: flex; flex-direction: column; gap: 7px; }
.quantity-box label {
    color: var(--text-muted);
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
}
.quantity-box select {
    height: 50px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border);
    padding: 0 12px;
    font-size: 1rem;
    font-family: "Montserrat", sans-serif;
    background: var(--white);
    color: var(--dark);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.quantity-box select:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(31,99,164,.12);
}

/* Boton principal */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 56px;
    border: none;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--accent) 0%, #FF9020 100%);
    color: #fff;
    font-family: "Montserrat", sans-serif;
    font-weight: 700;
    font-size: .92rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    cursor: pointer;
    width: 100%;
    box-shadow: 0 10px 32px rgba(255,122,0,.36);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,.15) 0%, transparent 60%);
    pointer-events: none;
}
.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255,122,0,.35);
    filter: brightness(1.06);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 4px 14px rgba(255,122,0,.22);
}
.btn-primary:disabled {
    opacity: .45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Feedback del carrito */
.cart-feedback {
    margin-top: 12px;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    font-size: .88rem;
    font-weight: 600;
    animation: fadeUp .25s var(--ease-out) both;
}
.cart-feedback.success {
    background: #e8f5ec;
    color: #16653b;
    border: 1px solid rgba(22,101,52,.18);
}
.cart-feedback.error {
    background: #fdecea;
    color: #a33025;
    border: 1px solid rgba(163,48,37,.14);
}

/* Tarjeta de ayuda */
.purchase-help-card {
    margin-top: 20px;
    border-radius: var(--radius-md);
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    padding: 18px 20px;
    transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}
.purchase-help-card:hover {
    border-color: rgba(31,99,164,.28);
    background: var(--primary-100);
    box-shadow: var(--shadow-soft);
}
.purchase-help-kicker {
    margin: 0 0 6px;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    font-weight: 800;
    color: var(--primary-400);
}
.purchase-help-card h3 {
    margin: 0 0 8px;
    font-size: 1.45rem;
    color: var(--primary-500);
    line-height: 1.15;
}
.purchase-help-card p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.7;
    font-size: .88rem;
}
.purchase-help-link {
    margin-top: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    background: #25D366;
    border: 1px solid #1ebe5a;
    color: #ffffff;
    font-weight: 800;
    font-size: .85rem;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 6px 18px rgba(37,211,102,.28);
}
.purchase-help-link:hover {
    background: #20b954;
    border-color: #1aaa4d;
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(37,211,102,.38);
}

/* ============================================================
   SECCION DE RESENAS
   ============================================================ */
.reviews-section {
    max-width: 860px;
    margin: 36px auto 64px;
    padding: 0 24px;
    animation: fadeUp .4s var(--ease-out) both;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 18px;
    margin-bottom: 22px;
}
.section-kicker {
    color: var(--primary-500);
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .73rem;
    font-weight: 700;
    margin-bottom: 5px;
}
.section-heading h2 {
    font-size: 2rem;
    color: var(--earth);
    line-height: 1;
}
.section-link {
    color: var(--earth);
    font-weight: 700;
    font-size: .88rem;
    transition: color var(--transition-fast);
    white-space: nowrap;
}
.section-link:hover { color: var(--primary-400); }

/* Resumen de calificacion */
.reviews-rating-summary {
    display: flex;
    align-items: center;
    gap: 14px;
}
.reviews-avg-score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-500);
    line-height: 1;
    font-family: "Cormorant Garamond", serif;
}
.reviews-avg-stars {
    color: var(--accent);
    font-size: 1.35rem;
    letter-spacing: 3px;
    line-height: 1;
}
.reviews-avg-count {
    font-size: .82rem;
    color: var(--text-muted);
    margin-top: 3px;
}

/* Lista de resenas */
.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 24px 0;
}

.review-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    animation: fadeUp .3s var(--ease-out) both;
}
.review-card:hover {
    border-color: rgba(31,99,164,.28);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.review-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.review-author { font-weight: 700; color: var(--earth); font-size: .92rem; }
.review-stars  { color: var(--accent); font-size: 1rem; letter-spacing: 2px; }
.review-date   { font-size: .78rem; color: var(--text-faint); margin-left: auto; }
.review-comment {
    color: var(--text-muted);
    font-size: .91rem;
    line-height: 1.7;
    margin: 0;
}

.reviews-empty {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
    font-size: .93rem;
}

/* Formulario de resena */
.review-form-wrap {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 8px;
    animation: fadeUp .3s var(--ease-out) both;
}
.review-form-title {
    font-size: 1.4rem;
    color: var(--earth);
    margin-bottom: 18px;
}

/* Estrellas interactivas */
.review-stars-input {
    display: flex;
    gap: 4px;
    margin-bottom: 18px;
}
.star-btn {
    background: none;
    border: none;
    font-size: 2.1rem;
    color: var(--bg-muted);
    cursor: pointer;
    padding: 0 3px;
    line-height: 1;
    transition: color .12s ease, transform .12s var(--ease-spring);
    filter: drop-shadow(0 0 0 transparent);
}
.star-btn:hover,
.star-btn.active {
    color: var(--accent);
    filter: drop-shadow(0 2px 6px rgba(255,122,0,.35));
}
.star-btn:hover { transform: scale(1.25) rotate(-5deg); }
.star-btn.active { transform: scale(1.08); }

.review-textarea {
    width: 100%;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 13px 15px;
    font-family: "Montserrat", sans-serif;
    font-size: .9rem;
    color: var(--dark);
    background: var(--white);
    resize: vertical;
    min-height: 100px;
    margin-bottom: 16px;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    line-height: 1.6;
}
.review-textarea:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(31,99,164,.12);
}

.review-form-feedback {
    padding: 11px 14px;
    border-radius: var(--radius-md);
    font-size: .87rem;
    font-weight: 600;
    margin-bottom: 14px;
    animation: fadeUp .2s var(--ease-out) both;
}
.review-form-feedback.success { background: #e8f5ec; color: #16653b; border: 1px solid rgba(22,101,52,.18); }
.review-form-feedback.error   { background: #fdecea; color: #a33025; border: 1px solid rgba(163,48,37,.14); }

.review-login-prompt {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: .91rem;
    background: var(--bg-subtle);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border);
}
.review-login-prompt a {
    color: var(--primary-500);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
}
.review-login-prompt a:hover { color: var(--primary-400); }

.reviews-load-more-wrap { text-align: center; margin-top: 18px; }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--text-muted);
    padding: 11px 28px;
    border-radius: var(--radius-full);
    font-family: "Montserrat", sans-serif;
    font-weight: 600;
    font-size: .86rem;
    letter-spacing: .02em;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast),
                color var(--transition-fast), transform var(--transition-fast);
}
.btn-secondary:hover {
    border-color: var(--primary-500);
    background: var(--primary-500);
    color: #fff;
    transform: translateY(-1px);
}

/* ============================================================
   PRODUCTOS RELACIONADOS
   ============================================================ */
.related-section {
    margin-top: 32px;
    border-radius: var(--radius-xl);
    padding: 28px;
    background: rgba(255,255,255,.94);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
    animation: fadeUp .5s var(--ease-out) both;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(4,minmax(0,1fr));
    gap: 16px;
}

.related-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    box-shadow: var(--shadow-xs);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
    border-color: rgba(31,99,164,.25);
}
.related-card-link  { display: flex; flex-direction: column; height: 100%; }
.related-card-media { background: var(--bg-subtle); overflow: hidden; }
.related-card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.related-card:hover .related-card-image { transform: scale(1.04); }
.related-card-body {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}
.related-card-category {
    color: var(--primary-400);
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-weight: 700;
}
.related-card-title  { color: var(--dark);  font-size: 1.15rem; line-height: 1.2; min-height: 2.6rem; }
.related-card-meta   { color: var(--muted); font-size: .84rem;  line-height: 1.55; min-height: 2.6rem; }
.related-card-footer {
    margin-top: auto;
    padding-top: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    border-top: 1px solid var(--border);
}
.related-card-price  { color: var(--primary-500); font-size: 1.1rem; font-weight: 800; }
.related-card-action {
    color: var(--accent);
    font-size: .8rem;
    font-weight: 700;
    transition: color var(--transition-fast);
}
.related-card:hover .related-card-action { color: var(--accent-hover); }

/* ============================================================
   BARRA FLOTANTE MOVIL
   ============================================================ */
.mobile-buy-bar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 140;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: rgba(240,244,248,.97);
    backdrop-filter: blur(14px) saturate(1.3);
    -webkit-backdrop-filter: blur(14px) saturate(1.3);
    border-top: 1px solid rgba(31,99,164,.14);
    box-shadow: 0 -8px 28px rgba(16,42,67,.12);
    transform: translateY(100%);
    transition: transform 0.34s cubic-bezier(.16, 1, .3, 1);
    pointer-events: none;
}
.mobile-buy-bar.is-active {
    transform: translateY(0);
    pointer-events: auto;
}
.mobile-buy-bar-inner {
    width: min(1280px,100%);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0,1fr) 150px;
    gap: 12px;
    align-items: center;
}
.mobile-buy-price-wrap { display: flex; flex-direction: column; gap: 2px; }
.mobile-buy-label {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--muted);
    font-weight: 700;
}
.mobile-buy-price {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-500);
    line-height: 1;
}
.mobile-buy-btn {
    min-height: 50px;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    font-family: "Montserrat", sans-serif;
    font-weight: 700;
    font-size: .88rem;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 6px 18px rgba(255,122,0,.28);
}
.mobile-buy-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(255,122,0,.35); }
.mobile-buy-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }

/* ============================================================
   UTILIDADES
   ============================================================ */
.hidden        { display: none !important; }
.visible-grid  { display: grid  !important; }
.visible-block { display: block !important; }

/* ============================================================
   ANIMACIONES
   ============================================================ */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1200px) {
    .related-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .main-product-image { height: 490px; }
}

@media (max-width: 980px) {
    .product-detail { grid-template-columns: 1fr; }
    .purchase-panel { position: static; }
    .main-product-image { height: 450px; }
    .related-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 768px) {
    .header-inner { min-height: auto; flex-direction: column; padding: 14px 20px; gap: 10px; }
    .logo { font-size: 1.65rem; }
    .top-nav { flex-wrap: wrap; justify-content: center; gap: 4px; }
    .top-nav a { font-size: .84rem; padding: 6px 12px; }

    .product-page { padding: 20px 16px 90px; }

    .gallery-grid { grid-template-columns: 1fr; }
    .thumbs-container {
        flex-direction: row;
        overflow-x: auto;
        gap: 10px;
        padding-bottom: 4px;
        max-height: none;
    }
    .thumb-btn { min-width: 82px; }
    .thumb-btn img { height: 82px; }

    .main-product-image { height: auto; aspect-ratio: 1 / 1.05; }

    .purchase-panel, .related-section { padding: 20px; border-radius: var(--radius-lg); }
    .purchase-price-row, .section-heading { flex-direction: column; align-items: flex-start; }
    .variant-status-grid, .purchase-row, .related-grid { grid-template-columns: 1fr; }
    .option-group-colors {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--primary-200) transparent;
    }
    .selection-stock-pill { align-self: flex-start; }
    .quantity-box, .quantity-box select, .btn-primary { width: 100%; }
    .mobile-buy-bar-inner { grid-template-columns: minmax(0,1fr) 138px; }
    .reviews-section { padding: 0 16px; }
}

/* barra visible en todos los tamaños — controlada por IntersectionObserver */

/* 640px — tablets pequeñas / phones grandes */
@media (max-width: 640px) {
    .product-name         { font-size: clamp(1.5rem, 5.5vw, 2rem); }
    .product-price        { font-size: 1.6rem; }
    .purchase-price-row   { padding: 12px 14px; margin-top: 12px; }
    .product-section      { margin-bottom: 14px; }
    .trust-item           { padding: 10px 12px; }
    .trust-item strong    { font-size: .8rem; }
    .trust-item span      { font-size: .75rem; }
    .related-card-image   { height: 220px; }
    .section-heading h2   { font-size: 1.65rem; }
    .purchase-panel       { padding: 18px; }
    .related-grid         { gap: 12px; }
}

@media (max-width: 520px) {
    .product-page { padding: 14px 12px 90px; }
    .gallery-shell, .purchase-panel, .related-section { border-radius: 18px; padding: 14px; }
    .product-name  { font-size: clamp(1.35rem, 6vw, 1.75rem); }
    .product-price        { font-size: 1.4rem; }
    .purchase-price-row   { padding: 10px 12px; margin-top: 10px; }
    .purchase-trust       { gap: 6px; margin-bottom: 10px; }
    .trust-item           { padding: 8px 10px; }
    .product-description { font-size: .88rem; line-height: 1.7; }
    .color-card { width: 72px; min-width: 72px; }
    .color-card-thumb { width: 58px; height: 68px; }
    .thumb-btn { min-width: 68px; }
    .thumb-btn img { height: 68px; }
    .mobile-buy-bar-inner { grid-template-columns: minmax(0,1fr) 120px; gap: 8px; }
    .mobile-buy-price { font-size: 1.15rem; }
    .mobile-buy-btn { min-height: 46px; font-size: .84rem; padding: 0 12px; }
    .section-heading h2 { font-size: 1.5rem; }
    .related-card-image { height: 170px; }
    .review-form-wrap { padding: 14px 12px; }
    .option-group { gap: 6px; }
    .size-btn { min-width: 44px; min-height: 44px; font-size: .84rem; }
    .purchase-row { gap: 10px; }
    .quantity-box select { font-size: .9rem; }
    .variant-status-grid { gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
    .thumb-btn, .btn-primary, .related-card, .related-card-image { transition: none; animation: none; }
}