/* Estilos Base e Identidad Visual */
:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --accent-color: #60a5fa;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Fondo Animado de Estrellas/Partículas */
.bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, #1e1b4b 0%, #0b0f19 100%);
}

/* Contenedor Principal */
.container {
    position: relative;
    z-index: 10;
    max-width: 1000px;
    width: 100%;
    padding: 2rem;
    text-align: center;
}

/* Encabezado */
.main-header {
    margin-bottom: 3.5rem;
}

.logo-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.logo-icon {
    font-size: 3rem;
    animation: float 4s ease-in-out infinite;
}

.site-title {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.site-title span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

/* Cuadrícula de Tarjetas */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: left;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(96, 165, 250, 0.4);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.card-link {
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 600;
    display: inline-block;
    transition: transform 0.2s ease;
}

.card:hover .card-link {
    transform: translateX(5px);
}

/* Pie de página */
.main-footer {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 300;
}

/* Animaciones */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Responsivo */
@media (max-width: 600px) {
    .site-title { font-size: 2.2rem; }
    .container { padding: 1rem; }
    .card { padding: 1.5rem; }
}