:root {
  --flex: flex;
  --items-center: center;
  --m-b-5: 1.5rem;
  --m-1-2: 1.2rem;
  --p-08: 0.8rem;
  --radius-5: 5px;
  --font-s-1: 1rem;
  --font-s-0-8: 0.8rem;
  --color-white: #fff;
  --color-green: #93a42a;
  --color-cyan: #005f6b;
  --color-black: #121310;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-size: Arial;
}

body {
  /* height: 100vh; */
}
#header {
  display: var(--flex);
  align-items: var(--items-center);
  justify-content: space-around;

  height: 80px;
  background-color: var(--color-black);
  color: #d2d2d2;
}
#logo img {
  width: 70px;
}
.menu {
  display: var(--flex);
  align-items: var(--items-center);
  list-style: none;
  gap: 0.5rem;
}
.menu a {
  display: block;
  padding: 0.5rem;
  text-decoration: none;
  color: var(--color-white);
  border: 2px solid transparent;
}
.menu a::after {
  content: "";
  width: 0;
  border-bottom: 2px solid var(--color-cyan);
  display: block;
  transition: 0.6s;
}
.menu a:hover::after {
  width: 100%;
}
#btn-mobile {
  display: none;
}

.section-convert {
  background-color: #d2d2d2;
  display: var(--flex);
  flex-direction: column;
  align-items: var(--items-center);
  justify-content: var(--items-center);
  height: calc(100vh - 230px);
}
.container {
  background-color: var(--color-cyan);
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  padding: var(--m-b-5);
  width: 400px;
  color: var(--color-white);
}
@media (min-width: 1024px) {
  .container {
    width: 600px;
  }
}
@media (max-width: 420px) {
  .section-convert {
    height: calc(100vh - 150px);
  }
  .container {
    width: initial;
    margin: 50px 10px;
  }
}
h1 {
  font-size: 24px;
  margin-bottom: var(--m-b-5);
  text-align: var(--items-center);
}

.input-group,
.output-goup {
  display: var(--flex);
  flex-direction: column;
  margin-bottom: var(--m-b-5);
}
.input-group label,
.output-goup label {
  margin-bottom: 0.4rem;
  font-weight: bold;
}
select,
input {
  padding: var(--p-08);
  border-radius: 5px;
  border: none;
  font-size: var(--font-s-1);
  background-color: #eee;
}

.section-convert button {
  background-color: var(--color-green);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-5);
  cursor: pointer;
  font-size: var(--font-s-1);
  padding: var(--p-08) var(--m-1-2);
  opacity: 0.7;
  transition: 0.4s;
}
button:hover {
  opacity: 1;
}

.output-goup {
  margin-top: var(--m-1-2);
}
#message {
  font-size: var(--font-s-0-8);
  color: #00dffc;
  margin-top: 0.7rem;
  text-align: var(--items-center);
}
footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 10px 0;
  height: 150px;
  /* height: 100%; */
}
footer p {
  text-align: var(--items-center);
}
footer a {
  display: block;
  color: var(--color-cyan);
  text-decoration: none;
}
.dev-icons {
  display: var(--flex);
  align-items: var(--items-center);
  justify-content: var(--items-center);
  gap: 20px;
  margin: var(--m-b-5);
}

.dev-icons i {
  font-size: 2rem;
}
@media (max-width: 400px) {
  #header {
    justify-content: space-between;
    padding: 0 15px;
  }
  #logo img {
    width: 50px;
  }
  .menu {
    display: block;
    /* display: none; */
    position: absolute;
    right: 0;
    top: 80px;
    background: var(--color-black);
    height: 0;
    width: 100%;
    z-index: 100;
    visibility: hidden;
    overflow-y: hidden;
    transition: 0.6s;
  }
  .menu a {
    font-size: 1.5rem;
    margin: 0 15px;
  }
  #nav.active .menu {
    height: calc(100vh - 80px);
    visibility: visible;
    overflow: auto;
  }
  #btn-mobile {
    display: flex;
    background: transparent;
    border: none;
    color: #005f6b;
  }
  #hamburguer {
    border-top: 3px solid;
    width: 30px;
    display: block;
  }
  #hamburguer::after,
  #hamburguer::before {
    content: "";
    width: 30px;
    height: 3px;
    background-color: currentColor;
    display: block;
    margin-top: 5px;
    transition: 0.3s;
  }

  nav.active #hamburguer {
    border-top-color: transparent;
  }
  nav.active #hamburguer::before {
    transform: rotate(135deg);
  }
  nav.active #hamburguer::after {
    transform: rotate(-135deg);
    margin-top: -3px;
  }
}