/* ============================================ */
/* BASE / RESET                                 */
/* Normalizacion de estilos del navegador       */
/* Fondo global y tipografia base               */
/* ============================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    position: relative;
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    background-image: var(--gradient-page);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: var(--line-height);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.pwa-install {
    position: fixed;
    z-index: var(--z-toast);
    right: 20px;
    bottom: calc(20px + env(safe-area-inset-bottom));
    display: flex;
    align-items: center;
    gap: 16px;
    width: min(420px, calc(100vw - 32px));
    padding: 14px 12px 14px 16px;
    color: var(--text-primary);
    background: rgba(var(--bg-primary-rgb), .97);
    border: 1px solid rgba(var(--color-primary-rgb), .42);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.pwa-install.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pwa-install__copy {
    display: grid;
    gap: 2px;
    min-width: 0;
    flex: 1;
}

.pwa-install__copy strong {
    font-size: .9rem;
    line-height: 1.25;
}

.pwa-install__copy span {
    color: var(--text-secondary);
    font-size: .75rem;
    line-height: 1.4;
}

.pwa-install__actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.pwa-install__button,
.pwa-install__dismiss {
    border: 0;
    font: inherit;
    cursor: pointer;
}

.pwa-install__button {
    min-height: 36px;
    padding: 0 12px;
    color: #fff;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: .78rem;
    font-weight: 700;
}

.pwa-install__button:hover {
    background: var(--color-primary-dark);
}

.pwa-install__dismiss {
    width: 30px;
    height: 30px;
    color: var(--text-muted);
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: 1.15rem;
    line-height: 1;
}

.pwa-install__dismiss:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, .08);
}

@media (max-width: 520px) {
    .pwa-install {
        right: 12px;
        bottom: calc(12px + env(safe-area-inset-bottom));
        width: calc(100vw - 24px);
        gap: 10px;
    }
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
    }
}

/* ── TRANSICIONES EXTREMAS 60FPS ── */
a, button, input, select, textarea, .product-card, .category-card, .related-card, .filter-btn, .variant-btn {
    transition-property: transform, opacity, background-color, border-color, box-shadow, color;
    transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
    transition-duration: 0.2s;
}

button:active, .filter-btn:active, .variant-btn:active {
    transform: scale(0.97) !important;
}

/* ── GHOST CURSOR FIX: prevent I-beam on non-input elements ── */
.product-gallery,
.product-info,
.product-tabs,
.review-card,
.review-form,
.tab-description,
.specs-table,
.related-products {
    user-select: none;
    -webkit-user-select: none;
    cursor: default;
}

/* Re-enable text selection on actual inputs and textareas */
input, textarea, select,
.review-form__textarea,
.review-form__input,
.form-input,
.form-select {
    user-select: text;
    -webkit-user-select: text;
    caret-color: auto;
}

/* Interactive elements should always be pointer */
button, a, .variant-btn, .variant-btn--size,
.gallery-thumb, .tabs-nav__btn, .btn--add-cart, .btn--wishlist,
.product-info__share-link, .review-card__helpful button {
    cursor: pointer;
    caret-color: transparent;
}

button:focus-visible, .variant-btn:focus-visible, .variant-btn--size:focus-visible {
    outline: none;
    caret-color: transparent;
}

/* Re-enable selection on review text content */
.review-card__text p,
.tab-description p {
    user-select: text;
    -webkit-user-select: text;
}

.product-card, .related-card {
    contain: layout style;
    user-select: none;
    -webkit-user-select: none;
}

.product-card:hover, .related-card:hover {
    transform: translateY(-4px);
    transition-duration: 0.35s;
}

body.no-scroll {
    overflow: hidden;
    max-height: 100svh;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    padding: 12px 24px;
    background: var(--color-primary);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.9rem;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    text-decoration: none;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
}

/* ── FONDO ANIMADO CON GRADIENTE QUE SE MUEVE ── */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(var(--color-primary-rgb), 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(var(--color-secondary-rgb), 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(var(--color-accent-rgb), 0.06) 0%, transparent 50%);
    animation: backgroundPulse 15s ease-in-out infinite;
    z-index: -1;
    pointer-events: none;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* ── ENLACES ─────────────────────────────────── */
a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ── IMAGENES ────────────────────────────────── */
img {
    max-width: 100%;
    height: auto;
}

/* ── BOTONES BASE ────────────────────────────── */
button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    color: inherit;
    user-select: none;
    -webkit-user-select: none;
    caret-color: transparent;
    outline: none;
}

/* ── INPUTS BASE ─────────────────────────────── */
input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ── FOCUS VISIBLE (Keyboard Accessibility) ──── */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary);
}

/* ── CONTENEDOR GENERAL ──────────────────────── */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ── FLUID TYPOGRAPHY SYSTEM ──────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing);
    color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: clamp(1rem, 2vw, 1.25rem); }
h5 { font-size: clamp(0.9rem, 1.5vw, 1.1rem); }
h6 { font-size: clamp(0.85rem, 1.2vw, 1rem); }

p {
    font-size: clamp(0.9rem, 1.2vw, 1rem);
    line-height: var(--line-height-relaxed);
    color: var(--text-muted);
}

/* ── ACCESIBILIDAD ───────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ── SELECCION DE TEXTO ──────────────────────── */
::selection {
    background: var(--color-primary);
    color: var(--text-primary);
}

/* ── SCROLLBAR PERSONALIZADA ─────────────────── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}