/* ==========================================================================
   Tubackup.cl - Design System Vanguardista (Vanilla CSS)
   Estética Cyber-Tech Dark Mode, Glassmorphism, Micro-animaciones & Glowing Accents
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800&display=swap');
@import url('https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css');

:root {
    /* Color Palette */
    --bg-dark: #070B14;
    --bg-surface: #0E1626;
    --bg-card: rgba(18, 28, 47, 0.7);
    --bg-card-hover: rgba(26, 40, 66, 0.85);
    
    /* Accents & Neon Gradients */
    --cyan-primary: #00F2FE;
    --blue-primary: #4FACFE;
    --purple-accent: #7F00FF;
    --emerald-accent: #10B981;
    --accent-gradient: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
    --accent-purple-gradient: linear-gradient(135deg, #7F00FF 0%, #E100FF 100%);
    --glow-cyan: 0 0 25px rgba(0, 242, 254, 0.35);
    --glow-blue: 0 0 20px rgba(79, 172, 254, 0.3);

    /* Text Colors */
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    /* Borders & Dividers */
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glowing: rgba(0, 242, 254, 0.3);

    /* Typography & Layout */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Global Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Grid & Utilities */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
    font-weight: 700;
}

a {
    color: var(--cyan-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Typography Gradient Effect */
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-gradient-purple {
    background: var(--accent-purple-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Glassmorphism Panel */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-glowing);
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), var(--glow-cyan);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    outline: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #070B14;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 35px rgba(0, 242, 254, 0.6);
    color: #000;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--cyan-primary);
    color: var(--cyan-primary);
}

.btn-outline:hover {
    background: rgba(0, 242, 254, 0.1);
    box-shadow: var(--glow-cyan);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.85rem;
}

/* Header & Navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 16px 0;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.brand-logo i {
    font-size: 1.8rem;
    color: var(--cyan-primary);
    filter: drop-shadow(0 0 8px var(--cyan-primary));
}

.brand-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    background: rgba(0, 242, 254, 0.15);
    color: var(--cyan-primary);
    border: 1px solid rgba(0, 242, 254, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 4px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--cyan-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-fast);
    border-radius: var(--radius-full);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 100px 0 80px;
    overflow: hidden;
    background: radial-gradient(circle at 50% 20%, rgba(0, 242, 254, 0.12) 0%, transparent 60%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    background: rgba(79, 172, 254, 0.1);
    border: 1px solid rgba(79, 172, 254, 0.3);
    color: var(--blue-primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.hero-card-preview {
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    position: relative;
}

.hero-card-preview::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border-radius: var(--radius-lg);
    background: var(--accent-gradient);
    z-index: -1;
    opacity: 0.3;
    filter: blur(10px);
}

.tech-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.stat-box {
    text-align: center;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--cyan-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* Sections Styling */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 50px;
}

.section-subtitle {
    color: var(--cyan-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: block;
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 16px;
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* Service Card */
.service-card {
    padding: 32px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--cyan-primary);
    margin-bottom: 24px;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    background: var(--cyan-primary);
    color: #070B14;
    box-shadow: var(--glow-cyan);
}

.service-title {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.service-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.feature-list {
    list-style: none;
    margin-bottom: 24px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.feature-item i {
    color: var(--emerald-accent);
}

/* Product Card */
.product-card {
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.product-img-wrapper {
    position: relative;
    width: 100%;
    height: 220px;
    background: #111A2E;
    overflow: hidden;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.product-card:hover .product-img {
    transform: scale(1.08);
}

.product-category-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cyan-primary);
    border: 1px solid var(--border-glass);
}

.product-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.15rem;
    margin-bottom: 10px;
    line-height: 1.3;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-glass);
}

.product-price {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cyan-primary);
}

.badge-stock {
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--emerald-accent);
}

/* Forms Styling */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: rgba(7, 11, 20, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--cyan-primary);
    box-shadow: var(--glow-cyan);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* Admin Dashboard Table */
.admin-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
    background: var(--bg-card);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.admin-table th, .admin-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-glass);
}

.admin-table th {
    background: rgba(7, 11, 20, 0.8);
    color: var(--cyan-primary);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.admin-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Alerts & Badges */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.92rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: #34D399;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #F87171;
}

/* Footer */
.site-footer {
    background: #04070D;
    border-top: 1px solid var(--border-glass);
    padding: 60px 0 30px;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 16px;
    max-width: 320px;
}

.footer-title {
    font-size: 1.05rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--cyan-primary);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-subtitle {
        margin: 0 auto 36px;
    }

    .hero-buttons {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2.4rem;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}