style.scss

:root {
  --black: #222;
  --white: #ffffff;
  --primary: #8574eb;
  --red: #da4b4b;
}

* {
  box-sizing: border-box;
}

html {
  background-color: var(--white);
  color: var(--black);
  font-size: 18px;
  font-family: "Nanum Gothic", sans-serif;
  @media only screen and (max-width: 600px) {
    font-size: 16px;
  }
}
// layout
main {
  display: flex;
  min-height: 100vh;
  overflow: hidden;
  justify-content: space-between;
  @media only screen and (max-width: 600px) {
    height: #{"clamp(100vh, 100%, 100%)"};
    flex-direction: column;
  }
  section {
    padding: 1rem 2rem;
    flex-grow: 2;
    display: flex;
    flex-direction: column;
    @media only screen and (max-width: 600px) {
      padding: 1rem;
    }
  }
  aside.banner {
    min-width: 450px;
    width: 450px;
    @media only screen and (max-width: 700px) {
      width: 100%;
      min-width: 100%;
      max-height: 400px;
    }
    img {
      height: 100%;
      width: 100%;
      object-fit: cover;
      object-position: bottom;
    }
  }
}

// header

header {
  nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    li {
      list-style-type: none;
      &.ml {
        margin-left: auto;
      }
      a {
        display: inline-block;
        color: currentColor;
        font-size: 1.4rem;

        &:hover {
          color: var(--primary);
        }
      }
    }
    .brand {
      height: 65px;
      width: 65px;
      @media only screen and (max-width: 600px) {
        height: 45px;
        width: 45px;
      }
      img {
        height: 100%;
        width: 100%;
        object-fit: contain;
      }
    }
  }
}

.body {
  text-align: center;
  h1 {
    font-size: 4rem;
    margin-bottom: 0;
    font-weight: 800;
    @media only screen and (max-width: 600px) {
      font-size: 2rem;
      margin-top: 2em;
    }
  }
  .text {
    color: #868686;
    margin-top: 0.5rem;
    margin-bottom: 6em;
    @media only screen and (max-width: 600px) {
      margin-bottom: 2rem;
    }
  }
}

.card {
  padding: 1em;
  box-shadow: -2px 3px 8px rgba(0, 0, 0, 0.1);
  width: 500px;
  margin: 2rem auto;
  max-width: 100%;
  display: flex;
  gap: 1rem;
  border-radius: 8px;
  box-sizing: border-box;
  @media only screen and (max-width: 600px) {
    width: 100%;
  }

  .left {
    height: 65px;
    width: 65px;
    min-width: 65px;
    border-radius: 50%;
    background-color: rgba(221, 47, 69, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    img {
      height: 40px;
      width: 40px;
      object-fit: contain;
    }
  }
  .right {
    flex-grow: 2;
    position: relative;
    input {
      height: 100%;
      width: 100%;
      outline: none;
      border: none;
      font-size: 1.1rem;

      //   &::placeholder {
      //     font-weight: bold;
      //   }
      &.invalid {
        color: var(--red);
        & + .error {
          opacity: 1;
          bottom: -44px;
        }
      }
    }
    .error {
      text-align: left;
      display: block;
      font-size: 0.7em;
      position: absolute;
      bottom: -55px;
      color: var(--red);
      left: 0;
      transition: 0.3s linear;
      opacity: 0;
    }
    h2 {
      text-align: left;
      font-size: 1.3rem;
      margin: 0;
    }
  }
}

.answer {
  align-items: center;
  transform: translateY(0px);
  transition: 0.3s linear;
  opacity: 1;
  visibility: visible;
  border: 2px solid var(--primary);
  &.hide {
    transform: translateY(10px);
    opacity: 0;
    visibility: hidden;
  }
  .left {
    background-color: #8574eb57;
  }
}

footer {
  text-align: center;
  margin-top: auto;
  font-size: 13px;
  a {
    color: currentColor;
    text-decoration: none;
    &:hover {
      color: var(--red);
    }
  }
}

// file upload

/* Styling for the file upload container */
.file-upload {
  display: inline-block;
  position: relative;
}

/* Hide the input element */
#file-input {
  display: none;
}

/* Style the label to look like a button */
.file-label {
  cursor: pointer;
  padding: 14px 22px;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 18px;
  display: flex;
  align-items: center;
  transition: 0.3s linear;
  @media only screen and (max-width: 600px) {
    font-size: 14px;
    padding: 12px 16px;
  }

  .file-text {
    font-weight: bold;
  }
  .file-icon {
    margin-right: 10px;
    font-size: 20px;
    @media only screen and (max-width: 600px) {
      margin-right: 4px;
      font-size: 17px;
    }
  }
}

// styles about tables
.data-table {
  max-width: 1200px;
  margin: 30px auto;
  width: 90%;
  overflow-x: auto;
  max-height: 80vh;
  @media only screen and (max-width: 600px) {
    width: 100%;
  }
  table {
    border-collapse: collapse;
    margin: 25px 0;
    font-size: 0.9em;
    font-family: sans-serif;
    min-width: 400px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
    width: 100%;
    text-align: center;
    @media only screen and (max-width: 600px) {
      font-size: 14px;
    }
    thead {
      position: sticky;
      top: 0;
      z-index: 9;
      tr {
        background-color: var(--primary);
        color: #ffffff;
        text-align: left;
      }
      th {
        @media only screen and (max-width: 600px) {
          padding: 12px 4px;
        }
      }
    }
    th,
    td {
      padding: 12px 15px;
      text-align: center;
      @media only screen and (max-width: 600px) {
        padding: 4px;
      }
    }
    tbody tr {
      border-bottom: 1px solid #dddddd;
      &:nth-of-type(even) {
        background-color: #f3f3f3;
      }
      &:last-of-type {
        border-bottom: 2px solid var(--primary);
      }
    }
  }

  .sim-tag {
    border: 1px solid var(--primary);
    border-radius: 8px;
    padding: 6px;
    display: flex;
    gap: 6px;
    align-items: center;
    @media only screen and (max-width: 600px) {
      border: none;
      padding: 0;
    }
    .img-box {
      height: 35px;
      width: 35px;
      min-width: 35px;
      border-radius: 50%;
      background-color: #8574eb57;
      display: flex;
      align-items: center;
      justify-content: center;
      @media only screen and (max-width: 600px) {
        height: 25px;
        width: 25px;
        background-color: transparent;
        border-radius: 0;
      }
      img {
        height: 25px;
        width: 25px;
      }
    }
  }
}

#export-button {
  margin-bottom: 40px;
  a {
    cursor: pointer;
    padding: 14px 22px;
    border: 1px solid var(--primary);
    color: var(--primary);
    border-radius: 8px;
    font-size: 18px;
    transition: 0.3s linear;
    display: inline-block;
    text-decoration: none;
    @media only screen and (max-width: 600px) {
      font-size: 14px;
      padding: 12px 16px;
    }
  }
}