* {
    font-family: Dosis;
    padding: 0;
    margin: 0;
}

body {
    background-color: #2f2f2f;
}

header {
    display: flex;
    align-items: center; /* vertical center */
    padding: 0 20px; /* side padding */
    height: 150px;
    color: #fff;
    background-color: #181818;
}

header a {
    font-size: 40px;
    margin: 0;
    color:#fff;
    text-decoration: none;
}

#mainContainer {
    display: flex;
    flex-direction: column;
    max-width: 600px;
    width: 90%;
    margin: 50px auto;
    background-color: #252525;
    border: 1px solid #181818;
    border-radius: 10px;
    overflow: hidden;
}

#innerContainer {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 20px;
    position: relative;
}

#mainContainer h2 {
    color: #fff;
    background-color: #181818;
    text-align: center;
    padding: 12px 0;
    font-size: 1.3rem;
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: #fff;
  font-size: 14px;
  user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-radius: 4px;
  display: inline-block;
  position: relative;
  transition: all 0.2s ease;
}

.checkbox-wrapper input[type="checkbox"]:checked + .custom-checkbox {
  background-color: #3498db;
  border-color: #3498db;
}

.checkbox-wrapper input[type="checkbox"]:checked + .custom-checkbox::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0px;
  width: 6px;
  height: 12px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

#passLength {
    width: 120px;
    height: 40px;
    background-color: #181818;
    border: 1px solid #4d4a4a;
    color: #fff;
    text-indent: 10px;
}

#passLength::placeholder {
    text-align: center;
    text-indent: 0;
}

#generateBtn {
    background-color: #181818;
    color: #fff;
    padding: 10px;
    border: 1px solid #fbfbfb;
    cursor: pointer;
    width: fit-content;
    margin: 0 auto;
    transition: background 0.2s;
}

#generateBtn:hover {
    background-color: #333;
}

#generatedPassWrapper {
     position: relative;
     width: 100%;
     margin-top: 20px;
}

#generatedPass {
     display: block;
     width: 100%;
     padding: 10px 45px 10px 10px;
     text-align: center;
     color: #fff;
     background-color: #181818;
     border: 1px solid #4d4a4a;
     box-sizing: border-box;
}

#copyBtn {
    position: absolute;
    top: 28%;
    right: 1px;
    transform: translateY(-50%);
    background: #2f2f2f;
    padding: 10.7px;
    cursor: pointer;
    color: #8f8f8f;
}

#msg {
     text-align: center;
     color: #fff;
     margin-top: 12px;
     min-height: 20px;
}

#copyright {
  text-align: center;
  color: #fff;
}


@media (max-width: 480px) {
  #mainContainer {
    width: 95%;
  }

  #mainContainer h2 {
    font-size: 1.1rem;
    padding: 10px 0;
  }

  #passLength {
    width: 100%;
    max-width: 150px;
  }

  #generatedPass {
    font-size: 0.9rem;
  }
}