:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(147, 51, 234, 0.15) 0%, transparent 50%);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #60a5fa;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 5rem 1rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Category Tabs Premium Styles */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 3rem auto;
    flex-wrap: wrap;
    background: rgba(15, 23, 42, 0.6);
    padding: 0.5rem;
    border-radius: 9999px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    width: fit-content;
    max-width: 100%;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.tab-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6); /* Gradiente azul a morado */
    border-radius: 9999px;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.tab-btn:hover {
    color: white;
    transform: translateY(-2px);
}

.tab-btn:hover::before {
    opacity: 0.3;
}

.tab-btn.active {
    color: white;
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

.tab-btn.active::before {
    opacity: 1;
}

/* Products Grid */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 3rem 0;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: rgba(96, 165, 250, 0.5);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* Carrusel de Imágenes */
.carousel-container {
    position: relative;
    width: 100%;
    height: 250px;
    background-color: #1e293b;
    overflow: hidden;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
    z-index: 1;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(15, 23, 42, 0.5);
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.carousel-container:hover .carousel-btn {
    opacity: 1;
}

.carousel-btn:hover {
    background: var(--primary-color);
}

.carousel-btn.prev {
    left: 10px;
}

.carousel-btn.next {
    right: 10px;
}

.carousel-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 5px;
    z-index: 2;
}

.carousel-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.3s;
}

.carousel-dots .dot.active {
    background: white;
    transform: scale(1.2);
}

.product-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.875rem;
    color: #60a5fa;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.product-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.product-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-prices {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: auto;
    border-top: 1px solid var(--glass-border);
    padding-top: 1rem;
}

.price-item {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.price-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #34d399; /* Green tone for price */
}

/* Form Styles (Login & Admin) */
.form-container {
    max-width: 400px;
    margin: 4rem auto;
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    color: white;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #60a5fa;
}

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.5);
    color: #fca5a5;
}

/* Promo Section (VIMIL ESTUDIO) */
.promo-section {
    margin: 4rem 1.5rem;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(30, 41, 59, 0.9));
    border-radius: 2rem;
    border: 1px solid rgba(96, 165, 250, 0.3);
    text-align: center;
    position: relative;
    overflow: hidden;
    max-width: 1200px;
}

@media (min-width: 1200px) {
    .promo-section {
        margin: 4rem auto;
    }
}

.promo-content {
    position: relative;
    z-index: 2;
}

.promo-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.promo-section p {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 750px;
    margin: 0 auto 2.5rem auto;
    line-height: 1.7;
}

.btn-promo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-promo:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.6);
    color: white;
}

.promo-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.1), transparent 50%);
    z-index: 1;
    pointer-events: none;
    animation: slowPulse 8s ease-in-out infinite alternate;
}

@keyframes slowPulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.1); opacity: 1; }
}