/* Reset básico */
body {
  font-family: Arial, sans-serif;
  margin: 0px;
  padding: 0;
  background: #050101;
  background: linear-gradient(29deg, rgb(6, 11, 27) 50%, rgba(110, 255, 146, 1) 250%);
  background-size: 1920px 2000px;
  /*color: #707070;*/
}

/* Encabezado */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background-color: #181717;
  border-bottom: 1px solid #e7e7e7;
}

header h1 {
  font-size: 30px;
  color: #e7e7e7;
  margin: 0;
}

main {
  padding: 20px;
  margin: 60px;
  text-align: center;
}

main h2 {
  font-size: 20px;
  color: #051d12;
  margin-bottom: 20px;
}

main h6 {
  font-size: 50px;
  color: #9aebc6;
  margin-bottom: 10px;
  margin-top: -70px;
}

/* Menú */
nav ul {
  list-style: none;
  display: flex;
  gap: 35px;
  margin: 0px;
  padding: 0;
  color: #e7e7e7;
}

nav ul li a {
  text-decoration: none;
  font-size: 17px;
  color: #e7e7e7;
  font-weight: bold;
}

nav ul li a:hover {
  text-decoration: underline;
}

.free-lesson {
  display: block;
  border: 2px solid #03e27e;
  border-radius: 15px;
  padding:20px;
  margin: 20px auto;
  width: 50%;
  background-color: #18171744;
  box-shadow: 0 0 6px #03e27e;
} 

/* Botón de login */
.login-btn {
  background-color: transparent;
  color: white;
  border: 1px solid white;
  padding: 5px 30px;
  border-radius: 10px;
  cursor: pointer;
}
.login-btn:hover {
  background-color: #555;
}

.btn-comprar {
  background-color: #40ffbf;
  color: rgb(25, 185, 137);
  border: 2px solid #00ff37;
  padding: 10px 20px;
  border-radius: 20px;
  margin-top: 15px;
  margin-bottom: 10px;
  margin-left: 20px;
  cursor: pointer;
  box-shadow: inset 3px 3px 20px #ffffff;
  box-shadow: 0 0 20px #31ffa2;
  /*display: block;*/
  align-items: center;
  animation: shadow-growth 5s infinite alternate; /* Apply the animation */
}

.btn-comprar:hover {
  background-color: #00ff40; 
}

.txt-btn-comprar {
  font-size: 15px;
  font-weight: bold;
  color: rgb(7, 27, 21);
}

.btn-entrar {
  background-color: #e3fff6;
  color: rgb(25, 185, 137);
  border: 2px solid #00ff37;
  padding: 10px 20px;
  border-radius: 20px;
  margin-top: 15px;
  margin-bottom: 10px;
  margin-left: 20px;
  cursor: pointer;
  box-shadow: inset 3px 3px 20px #ffffff;
  box-shadow: 0 0 10px #31ffa2;
  /*display: block;*/
  align-items: center;
}

.btn-entrar:hover {
  background-color: #00ff40; 
}

.txt-btn-entrar {
  font-size: 15px;
  font-weight: bold;
  color: rgb(7, 27, 21);
}

/* Botón de crear cuenta */
.subscribe-btn {
  background-color: #40ffbf;
  color: rgb(25, 185, 137);
  border: 2px solid #00ff37;
  padding: 0px 40px;
  border-radius: 20px;
  margin-top: 35px;
  margin-bottom: 10px;
  cursor: pointer;
  box-shadow: inset 3px 3px 20px #ffffff;
  box-shadow: 0 0 20px #31ffa2;
  /*display: block;*/
  align-items: center;
  animation: shadow-growth 5s infinite alternate; /* Apply the animation */
}

.subscribe-btn:hover {
  background-color: #00ff9d; 
} 

@keyframes shadow-growth {
  0% {
    box-shadow: 0 0 5px 0px rgba(0, 0, 0, 0.5); /* Initial state: small blur, no spread */
  }
  50% {
    box-shadow: 0 0 20px 10px rgba(4, 255, 150, 0.986); /* Mid-point: larger blur, some spread */
  }
  100% {
    box-shadow: 0 0 5px 0px rgba(0, 0, 0, 0.5); /* Final state: back to initial size */
  }
}

.generic-btn {
  background-color: #40ffbf;
  color: rgb(25, 185, 137);
  border: 2px solid #00ff37;
  padding: 0px 40px;
  border-radius: 20px;
  margin-top: 35px;
  margin-bottom: 10px;
  cursor: pointer;
  box-shadow: inset 3px 3px 20px #ffffff;
  box-shadow: 0 0 20px #31ffa2;
  /*display: block;*/
  align-items: center;
}

.generic-btn:hover {
  background-color: #00ff9d; 
}

/* Imagen principal */
.hero-img {
  max-width: 100%;
  height: auto;
  margin: 0px auto;
  align-items: center;
  display: none;
}

/* Contenido principal */
main {
  padding: 100px 5px;
  text-align: center;
  font-size: 25px;
  text-shadow: 2px 2px 2px #161616;
  color: #9aebc6;
}

main div {
  display: flex;
  width: 60%;
  padding: 0px 673px;
}

/* Secciones */
section {
  margin: 30px 0;
}

.dropdown {
  display: block;
  align-items: center;
  width: 8%;
  padding: 0px;
  margin-top: 15px;
  margin-left: 20px;
  margin-right: 0px;
  margin-bottom: 15px;
  border: 3px solid #ccc;
  border-radius: 5px;
  border-color: #9aebc6;
  background-color: #a8a8a8;
  color: #e7e7e7;
}

.dropdown:focus {
  background: #333333;
  border: 3px solid;
  border-color: #03e27e;
  outline: none;
}

.number-input {
  display: block;
  align-items: center;
  width: 23%;
  padding: 15px;
  margin-top: 15px;
  margin-left: 20px;
  margin-right: 0px;
  margin-bottom: 15px;
  border: 3px solid #ccc;
  border-radius: 5px;
  border-color: #9aebc6;
  background-color: #a8a8a8;
  color: #e7e7e7;
}

.number-input:focus {
  background: #333333;
  border: 3px solid;
  border-color: #03e27e;
  outline: none;
}

/* Formularios */
.input-field {
  display: block;
  align-items: center;
  width: 20%;
  padding: 15px;
  margin-top: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 15px;
  border: 3px solid #ccc;
  border-radius: 5px;
  border-color: #9aebc6;
  background-color: #a8a8a8;
  color: #e7e7e7;
}

.input-field:focus {
  background: #333333;
  border: 3px solid;
  border-color: #03e27e;
  outline: none;
}

section h1{
    font-size: 30px;
    color: #000000;
    text-shadow: 0 0 5px #43fcc4;
}

section h2 {
  font-size: 38px;
  margin-bottom: 10px;
}

.free-content-div {
  display: block;
  border: 2px solid #03e27e;
  border-radius: 15px;
  padding: 20px;
  margin: 20px auto;
  width: 50%;
  background-color: #181717;
  box-shadow: 0 0 6px #03e27e;
  ;
}

.curso-card {
  display: block;
  background-color: #14ffa536;
  backdrop-filter: blur(20px);
  border: 2px solid #03e27e;
  border-radius: 15px;
  padding: 20px;
  margin: 20px auto;
  margin-bottom: 40px;
  width: 50%;
  box-shadow: 0 0 6px #03e27e;
}

/*div {
  width: 320px;
  height: 300px;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgb(77, 255, 187);
  margin: auto;
}*/