:root {
  --bgcolor: #0cc0df;
  --txcolor: #ffffff;
  --ptcolor: #043942;
  --cdcolor: #062c2d;
  --border-radius: 8px;
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bgcolor);
  color: var(--txcolor);
  font-family: var(--font-family);
  font-size: 1.25rem;
  line-height: 1.5;
}

header {
  background-color: var(--bgcolor);
  border-bottom: 2px solid var(--txcolor);
  text-align: center;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-around;
}

main#pts {
  background-color: var(--ptcolor);
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-sizing: border-box;
}

.pt {
  scroll-margin-top: 170px;
  background-color: var(--ptcolor);
  padding: 1.5rem;
  margin-bottom: 2rem;
  border-radius: var(--border-radius);
  transition: background-color 0.3s ease;
  outline-offset: 4px;
}

.pt h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.5rem;
  border-bottom: 2px solid var(--txcolor);
  padding-bottom: 0.3rem;
}

.pt p {
  margin: 0;
  font-size: 1rem;
  color: var(--txcolor);
}

#codes {
  display: block;
}

.code-sample {
  border-radius: var(--border-radius);
  padding: 1rem;
  white-space: pre-wrap;
  overflow-x: auto;
  font-family: 'Courier New', Courier, monospace;
  font-size: 1rem;
  line-height: 1.4;
  color: #d0f0f7;
}

code {
  white-space: pre-wrap;
}

code:hover {
  cursor: text;
}

#NameUserNavi,
#OsUserNavi {
  font-weight: bold;
  color: #a0e7f7;
}

#downloadbtn {
  font-size: 1.2rem;
  background-color: var(--cdcolor);
  border: 2px solid var(--txcolor);
  border-radius: var(--border-radius);
  color: var(--txcolor);
  padding: 1rem 2rem;
  transition: all 0.3s ease;
  font-weight: bold;
}

#downloadbtn:hover {
  cursor: pointer;
  background-color: var(--ptcolor);
  transform: scale(0.98);
}

#downloadbtn:active {
  transform: scale(0.89);
  cursor: progress;
}

#tutorialImg {
  height: 100%;
  width: 100%;
}

header button, header input[type=text], header select {
  background-color: transparent;
  border: 2px solid var(--txcolor);
  border-radius: var(--border-radius);
  color: var(--txcolor);
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  margin: 0 0.3rem;
  font-size: 1rem;
  transition:
    background-color 0.3s ease,
    color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.15s ease;
  cursor: pointer;
  user-select: none;
  outline-offset: 4px;
}

header select {
  color: black;
}
header button:hover,
header button:focus {
  background-color: var(--txcolor);
  color: var(--bgcolor);
  box-shadow: 0 4px 8px rgba(255 255 255 / 0.3);
  transform: scale(1.05);
}

header button:active {
  transform: scale(0.95);
  box-shadow: none;
}

#tutorial p {
  font-size: xx-large;
}

@media (max-width: 700px) {
  header button {
    font-size: xx-small;
    height: auto;
    width: auto;
  }
}

#osRodaveis {
  display: flex;
  width:  40px;
  height: 40px;
}

#df {
  display: flex;
}

#mains {
  display: flex;
}

#codePart {
  background-color: #212d2f;
  padding: 1px 1px;
  user-select: all;
  color: rgb(255, 255, 255);
  border-radius: 5px;
}