/* Variables base y Paletas de Colores */
:root {
    --bg-color: #0b0c10; /* Fondo oscuro místico */
    --text-main: #c5c6c7;
    --text-light: #ffffff;
    --transition-speed: 0.5s;
}

/* Paleta Teal (Index e Historia) */
body.theme-teal {
    --primary: #45a29e;
    --glow: rgba(69, 162, 158, 0.5);
}

/* Paleta Cian (Games) */
body.theme-cyan {
    --primary: #00e5ff;
    --glow: rgba(0, 229, 255, 0.5);
}

/* Paleta Purple/Orange (Apps) */
body.theme-purpor {
    --primary: #b300ff;
    --secondary: #ff7300;
    --glow: rgba(179, 0, 255, 0.5);
}

/* Paleta Red/Orange (Web) */
body.theme-redor {
    --primary: #ff3300;
    --secondary: #ff9900;
    --glow: rgba(255, 51, 0, 0.5);
}

/* Estilos Globales */
body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* Navegación fluida */
header {
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(11, 12, 16, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--glow);
}

h1, h2, h3 {
    color: var(--text-light);
    text-shadow: 0 0 10px var(--glow);
    font-weight: 300;
    letter-spacing: 2px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color var(--transition-speed), text-shadow var(--transition-speed);
}

nav a:hover {
    color: var(--primary);
    text-shadow: 0 0 15px var(--glow);
}

/* Contenido Principal */
main {
    padding: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.tarjeta {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.tarjeta:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow);
    border-color: var(--primary);
}

/* Clases para el JS (Efecto místico de aparición) */
.oculto {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}