* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primer-color: #f5f5f5;
  --segundo-color: #f44336;
  --tercero-color: #f5f5f5;
  --text-color: #333;
  --background-color: #f5f5f5;
}

body {
  font-family: Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
}
/*nav*/

nav {
  background-color: var(--primer-color);
  color: var(--text-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.logo {
  display: block;
  width: 90px;
  height: 90px;
  margin-left: 20px;
  cursor: pointer;
}
.nav-list {
  list-style: none;
  display: flex;
  gap: 20px;
}

.nav-link {
  text-decoration: none;
  color: #48e;
  font-weight: bold;
  font-size: 16px;
}

.nav-link:hover {
  color: red;
}

.nav-item:hover {
  cursor: pointer;
  transform: scale(1.1);
}

.nav-btn-container {
  display: flex;
  gap: 10px;
  margin-right: 20px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  margin-left: auto;
}
.menu-toggle .icon {
  display: block;
}
.menu-toggle .icon-close {
  display: none;
}
.menu-toggle.is-open .icon-open {
  display: none;
}
.menu-toggle.is-open .icon-close {
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
    /* estado cerrado */

  .nav-menu {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--primer-color);
    display: flex;
    flex-direction: column;
    gap: 30px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 10;
    text-align: center;
    max-height: 0;
    opacity: 0;
    transform: translateY(-8px);
    visibility: hidden;
    pointer-events: none;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease, transform 0.25s ease;
  }

  /* estado abierto */
  .nav-menu.open {
    max-height: 70vh;
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }
  .nav-list {
    flex-direction: column;
    gap: 30px;
    padding-top: 20px;
  }
  .nav-btn-container {
    margin-right: 0;
    width: 100%;
    justify-content: center;
  }
}

.nav-btn {
  padding: 10px;
  border-radius: 18px;
  cursor: pointer;
}

.btn-iniciar {
  background-color: var(--segundo-color);
  color: var(--tercero-color);
}

.btn-registrar {
  background-color: var(--tercero-color);
  color: var(--segundo-color);
}

.btn-iniciar:hover {
  background-color: var(--tercero-color);
  color: var(--secondary-color);
}

.btn-registrar:hover {
  color: var(--primary-color);
}