body {
    background: radial-gradient(circle at top left, #102f4e, #0a1f2d);
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    color: white;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
    width: 350px;
    text-align: center;
    animation: fadeInUp 1.5s ease;
}

.login-container input,
.boton-animado {
    width: 100%;
    padding: 12px 15px;
    margin: 12px 0;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    outline: none;
    transition: 0.3s;
    box-sizing: border-box;
}


.login-container input:focus {
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 10px #0ff;
}

.boton-animado {
    background: linear-gradient(90deg, #00f2fe, #4facfe);
    border: none;
    padding: 12px;
    border-radius: 10px;
    color: white;
    font-weight: bold;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.boton-animado:hover {
    background: linear-gradient(90deg, #4facfe, #00f2fe);
    box-shadow: 0 0 15px #00f2fe;
}

.titulo-animado {
    font-size: 1.4rem;
    margin-bottom: 20px;
    animation: parpadeo 2.5s infinite;
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes parpadeo {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.error {
    color: #e74c3c;
    font-size: 14px;
    margin: 5px 0;
    animation: aparecer 0.3s ease-in-out;
}

@keyframes aparecer {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}