* {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Orbitron", sans-serif;
  background-color: transparent;
}

.flex-style {
  display: flex;
  justify-content: space-around;
  gap: 2rem;
}

.video-background {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: 0;
  object-fit: cover;
}

/* ***VARIABLES*** */
:root {
  --primary-text-color: #ffffff ;
  --secundary-text-color:black ;
  --btn-text-color: white ;
  --btn-border-color:white ;
  --btn-bg-color-hover: white;
  --btn-border-color-hover:black;
  --btn-text-color-hover: black;
}

/* ***ESTILOS HEADER*** */
.nasa-header-nav {
  position: sticky;
  top: 0;
  background-color: transparent;
  padding-top: 0;
  padding-bottom: 0;
  z-index: 100;
}
.nasa-header-nav__toggler {
  border: none;
}
.nasa-header-nav__toggler:hover {
  background-color: var(--secundary-text-color);
  border: none;
}
.nasa-header-nav__logo {
  color: var(--primary-text-color);
}
.nasa-header-nav__logo:hover {
  color: var(--secundary-text-color);
}
.nasa-header-nav-list-item__white {
  color: var(--primary-text-color);
  border-top: 0.0625rem solid var(--primary-text-color);
  text-decoration: none;
  list-style: none;
  border: none;
  align-items: right;
}
.nasa-header-nav-list-item__white:hover {
  color: var(--secundary-text-color);
  text-decoration: none;
  list-style: none;
  border: none;
}

.navbar-expand-lg {
  color: var(--primary-text-color);
}

.navbar-toggler-icon {
  background-color: var(--primary-text-color);
}

.navbar-toggler {
  padding: 0;
  border: none;
}

.nasa-header-nav .navbar-toggler:focus,
.nasa-header-nav .navbar-brand:focus,
.nasa-header-nav .nav-link:focus {
  outline: none;
  border-color: var(--primary-text-color);
  box-shadow: 0 0 0 0.125rem var(--secundary-text-color);
  color: var(--secundary-text-color);
}

.footer {
  position: fixed;
  bottom: 0;
  width: 100%;
}
.footer-allrights__p_color {
  color: var(--primary-text-color);
}
.footer-icons-item-logo {
  color: var(--primary-text-color);
}
.footer-icons-item-logo:hover {
  color: var(--secundary-text-color);
}

.video-background {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: -1;
  object-fit: cover;
}

.main-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8rem;
  position: relative;
  margin-top: 9.375rem;
  margin-bottom: 6.25rem;
  justify-content: center;
}
@media (max-width: 48rem) {
  .main-container {
    top: 100%;
    gap: 2rem;
  }
}

.end-of-the-world-card {
  display: flex;
  flex-direction: column;
  max-width: 40%;
}
@media (max-width: 48rem) {
  .end-of-the-world-card {
    max-width: 80%;
  }
}
.end-of-the-world-card__title {
  color: var(--primary-text-color);
  font-size: 7rem;
}
@media (max-width: 48rem) {
  .end-of-the-world-card__title {
    font-size: 5rem;
  }
}
.end-of-the-world-card__text {
  color: var(--primary-text-color);
  font-size: 1.1rem;
}
.end-of-the-world-card__button {
  text-decoration: none;
  background-color: transparent;
  color: var(--btn-text-color);
  border: 0.0625rem solid var(--btn-border-color);
  border-radius: 0.3125rem;
  padding: 0.3125rem;
  max-width: 12rem;
  display: inline-block; 
  text-align: center;
}
.end-of-the-world-card__button:hover {
  background-color: var(--btn-bg-color-hover);
  color: var(--btn-text-color-hover);
}

.to-do-list {
  z-index: 1;
  max-width: 40%;
  padding-top: 1.875rem;
}
@media (max-width: 48rem) {
  .to-do-list {
    max-width: 80%;
  }
}
.to-do-list-form {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.to-do-list-form__input {
  padding: 0.3125rem;
  border-radius: 0.3125rem;
  border: none;
  margin-right: 1rem;
}
.to-do-list-form__submit-btn {
  text-decoration: none;
  background-color: transparent;
  color: var(--btn-text-color);
  border: 0.0625rem solid var(--btn-border-color);
  border-radius: 0.3125rem;
  padding: 0.3125rem;
}
.to-do-list-form__submit-btn:hover {
  background-color: var(--btn-bg-color-hover);
  color: var(--btn-text-color-hover);
}
.to-do-list-title {
  color: var(--primary-text-color);
}
.to-do-list-ul {
  list-style: none;
}
.to-do-list-ul__li {
  display: flex;
  gap: 1rem;
  color: var(--primary-text-color);
  padding-top: 1rem;
}
.to-do-list-ul__li-btn {
  border-radius: 50%;
  padding-right: 0.3125rem;
  padding-left: 0.3125rem;
  color: var(--primary-text-color);
  border: 1px solid var(--primary-text-color);
  background-color: transparent;
}
.to-do-list-ul__li-btn:hover {
  background-color: var(--primary-text-color);
  color: var(--secundary-text-color);
}

.section-table {
  z-index: 1;
  position: relative;
  max-width: 80%;
  margin: 0 auto;
  top: 20%;
}