@font-face {
  font-family: "Lora";
  src: url(../Fonts/Lora/Lora-VariableFont_wght.ttf);
}

@font-face {
  font-family: "Playfair";
  src: url(../Fonts/Playfair_Display/PlayfairDisplay-Regular.ttf);
}

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

body {
  background-color: rgb(120, 189, 196);
}

.navbar {
  display: flex;
  flex-direction: row;
  gap: 1vw;
  padding: 1rem;
  background-color: rgb(1, 44, 61);
  align-items: center;
  justify-content: space-between;
  color: white;

  .container-logo {
    display: flex;
    align-items: center;
    text-transform: uppercase;
  }

  img {
    height: 70px;
    border-radius: 5rem !important;
  }

  h1 {
    font-family: "Playfair";
    font-size: 20px;
    font-weight: 600;
    margin-left: 1rem;
    /* margin: auto; */
  }
}

.nav-item {
  display: flex;
  font-weight: bold;
}

.nav-link {
  color: white;
  border-bottom: 4px solid transparent; /* invisible border for layout stability */
  transition: color 0.3s ease, border-bottom-color 0.3s ease;
}

.nav-link:hover {
  color: rgb(247, 67, 79);
}

.nav-link.active {
  color: #fff;
  border-bottom: 3px solid #fff;
}

.card {
  background-color: rgb(246, 247, 242);
  /* border: 1px solid red; */
  border: none;
  width: 85vw;
  margin: auto;
  margin-top: 3rem;
  font-family: "Lora";
  padding: 2rem;
}

.card-title {
  font-weight: bolder;
  font-size: 25px;
}

.card-body {
  margin: auto;
  width: 75%;
}

.card-subtitle {
  font-size: 20px;
}

.card-text {
  font-size: 15px;
  margin-top: 1rem;
  line-height: 2;
}

.GWA-Calculator {
  border: 5px solid rgb(120, 189, 196);
  border-radius: 1rem;
  width: 650px;
  margin: auto;
  margin-top: 2.5rem;
  padding: 1rem;
}

.grade-container {
  /* border: 1px solid red; */
  background-color: rgba(231, 209, 209, 0.5);
  padding: 1rem;
  display: flex !important;
  justify-content: space-between;
  align-items: center;
  flex-direction: row !important;
  margin: 5px;
  input {
    width: 50%;
    margin-left: 3px;
    border-radius: 0.5rem;
    border: none;
    height: 30px;
    text-align: center;
  }
}

.subject-container {
  margin-top: 1px;
  color: rgb(247, 67, 79);
  font-weight: 800;
}

.button-container {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
  gap: 20px;
}

.btn {
  width: 200px;
}

.result-container {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
}

.result {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 1rem;
  input {
    margin-left: 5px;
    height: 35px;
    background-color: rgba(231, 209, 209, 0.5);
    border: none;
    font-family: "Poppins";
    text-align: center;
  }
  p {
    font-size: 15px;
    margin-top: 1rem;
    margin-right: 4px;
  }
}

.contents {
  margin-top: 2rem !important;
  text-align: left;
  width: 90%;
  margin: auto;
  border-top: 5px solid rgb(237, 64, 76);
}

.GWA-Introduction {
  margin-top: 1rem !important;
  line-height: 2;
  .title {
    margin-bottom: 1rem;
    font-size: 25px;
  }
  .text {
    width: 90%;
    margin: auto;
    font-size: 15px;
  }

  .subtitle {
    margin-top: 1rem;
    font-size: 25px;
  }
}

.formula-container {
  width: 45%;
  display: flex;
  flex-direction: row;
  margin: auto;
  padding: 0.5rem;
  .text {
    font-weight: bold;
  }
  img {
    height: 15vh;
  }
}

.example-table {
  width: 80%;
  margin: auto;
}

.instructions {
  font-size: 15px;
}

table {
  width: 40% !important;
  margin: auto;
  text-align: center;
}

footer {
  margin-top: 2rem;
  background-color: rgb(1, 44, 61);
  font-family: "Lora";
  padding: 15px;
  text-align: center;
  font-size: 15px;
  color: #ffffff;
  border-top: 1px solid #ccc;
  height: 8vh;
}

/* Tablet and below (max-width: 768px) */
@media (max-width: 768px) {
  main {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-item {
    display: flex;
    margin: auto;
  }

  main img {
    height: 60px;
  }

  main h1 {
    font-size: 15px;
    text-align: center;
  }

  .card {
    width: 95vw;
    padding: 1.5rem;
    margin-top: 0;
  }

  .card-body {
    width: 100%;
  }

  .card-subtitle {
    font-size: 18px;
  }

  .card-text {
    font-size: 15px;
    margin-top: 1rem;
    line-height: 1.5;
    text-align: center;
  }

  .GWA-Calculator {
    width: 100%;
    padding: 1rem;
    border-width: 3px;
    margin-top: 1rem;
  }

  .grade-container {
    flex-direction: row !important;
    align-items: center;
    gap: 0.5rem;
  }

  .grade-container input {
    width: 100%;
    margin-left: 0;
  }

  .button-container {
    flex-direction: column;
    gap: 10px;
  }

  .btn {
    width: 100%;
  }

  .result-container {
    flex-direction: row;
  }

  .result {
    flex-direction: row;
    gap: 0.5rem;
  }

  .result input {
    width: 50%;
  }

  .formula-container {
    width: 45%;
    height: 20vh;
    display: flex;
    flex-direction: column;
    margin: auto;
    padding: 0.5rem;
    .text {
      font-weight: bold;
    }
    img {
      height: 20vh;
    }
  }
}

/* Mobile phones (max-width: 480px) */
@media (max-width: 480px) {
  main h1 {
    font-size: 16px;
  }

  .nav-item {
    display: flex;
    margin: auto;
  }

  .card-title {
    font-size: 20px;
  }

  .card-subtitle {
    font-size: 18px;
  }

  .card-text {
    font-size: 14px;
  }
}