/* --- SWOVEX: CSS ANIMACIÓN AUTOMÁTICA --- */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    font-family: 'Segoe UI', Roboto, sans-serif; 
}

/* FONDO DE TRANSICIÓN */
.full-screen-bg {
    width: 100vw; 
    height: 100vh; 
    background: #0c4f69; /* Color base sólido para evitar parpadeos */
    position: relative; 
    overflow: hidden;
}
#intro-overlay {
    position: absolute; 
    inset: 0;
    /* Degradado de Azul Marino a Celeste Claro */
    background: linear-gradient(135deg, #062c3d 0%, #0c4f69 50%, #7DF9FF 100%);
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center;
    z-index: 2000;
    animation: fadeInOverlay 1s ease-in-out forwards;
}

@keyframes fadeInOverlay {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* LÍNEA DE HORIZONTE CENTRAL */
.horizon-line {
    position: absolute; 
    top: 50%; 
    left: 50%; 
    transform: translate(-50%, -50%);
    width: 0%; 
    height: 2px; 
    background: #FFF;
    box-shadow: 0 0 15px #FFF, 0 0 30px #7DF9FF, 0 0 50px #00E5EE;
    /* Expansión automática */
    animation: expandirLinea 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes expandirLinea {
    to { width: 90%; }
}

/* CONTENEDOR DE TEXTO */
#text-assembly-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2001;
}

.title-row, .subtitle-row { 
    display: flex; 
    justify-content: center; 
    width: 100%; 
}

/* ANIMACIÓN DE LETRAS (CELESTE SOBRE AZUL) */
.letra {
    display: inline-block; 
    font-size: clamp(1.8rem, 8vw, 3.8rem); 
    font-weight: 900; 
    color: #FFFFFF; /* Blanco para máximo contraste */
    text-shadow: 0 0 20px rgba(125, 249, 255, 0.8);
    opacity: 0;
    animation: caer-y-fijar 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.letra-sub {
    display: inline-block; 
    font-size: clamp(1rem, 4vw, 1.5rem); 
    color: #7DF9FF; /* Celeste claro para el subtítulo */
    font-weight: 600;
    letter-spacing: 2px;
    opacity: 0;
    animation: subir-y-fijar 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes caer-y-fijar {
    0% { transform: translateY(-150px); opacity: 0; filter: blur(10px); }
    100% { transform: translateY(-40px); opacity: 1; filter: blur(0); }
}

@keyframes subir-y-fijar {
    0% { transform: translateY(150px); opacity: 0; filter: blur(10px); }
    100% { transform: translateY(40px); opacity: 1; filter: blur(0); }
}

/* RESPONSIVO */
@media (max-width: 768px) {
    .letra { font-size: 2.2rem; }
    .letra-sub { font-size: 1rem; }
    @keyframes expandirLinea { to { width: 85%; } }
}