:root {
    --primary-color: #1a73e8;
    --secondary-color: #ff4081;
    --bg-dark: #121212;
    --bg-darker: #0a0a0a;
    --bg-card: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #2d2d2d;
    --card-shadow: 0 4px 20px rgba(0,0,0,0.4);
    --hover-color: #2d2d2d;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-dark);
    min-height: 100vh;
}

/* Header y navegación */
.header {
    background: var(--bg-darker);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.main-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero section */
.hero {
    background: linear-gradient(135deg, var(--bg-darker), var(--bg-dark));
    padding: 4rem 1rem;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('assets/pattern.html');
    opacity: 0.05;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* Cards de compañías */
.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.company-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.company-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.6);
    border-color: var(--primary-color);
}

.card-header {
    background: var(--bg-darker);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.card-header img {
    max-width: 100%;
    height: auto;
    filter: brightness(1.2);
}

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

.form-group label {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 1rem;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26,115,232,0.2);
    outline: none;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26,115,232,0.4);
}

/* Sección de beneficios */
.benefits-section {
    background: var(--bg-darker);
    padding: 4rem 2rem;
    margin-top: 3rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.benefit-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.benefit-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Formulario de recarga */
.recharge-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
}

.amount-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.amount-option {
    padding: 1rem;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
}

.amount-option:hover,
.amount-option.selected {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--bg-darker);
    padding: 4rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .companies-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    .amount-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* EFECTO DE ENTRADA PARA LOGO */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-load {
    animation: fadeInUp 1s ease-out;
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-darker);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Hover neon violeta */
.card, .legal-box {
    transition: all 0.3s ease;
}

.card:hover,
.legal-box:hover {
    border-color: #8b5cf6;
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.4);
    transform: translateY(-3px);
}