body {
  margin: 0;
  min-height: 100vh;
  color: #f3f3f3;
  background-color: #141414;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.top-container {
  width: 100%;
  padding: 72px 0 56px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.top-container h1 {
  font-family: "Montserrat", sans-serif;
  font-size: 52px;
  font-weight: 600;
  margin: 0 0 14px;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.top-container p {
  font-family: "Roboto", sans-serif;
  font-size: 17px;
  font-weight: 400;
  margin: 0;
  line-height: 1.7;
  opacity: 0.8;
}

.top-container h1 + p {
  margin-top: 6px;
}

.main-container {
  flex: 1;
  margin-top: 60px;
  text-align: center;
}

.main-container p {
  font-family: "Roboto", sans-serif;
  font-size: 40px;
  margin-bottom: 20px;
}

button.input {
  position: relative;
  background-color: #1f1f1f;
  color: #f3f3f3;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 50px 100px;
  font-size: 18px;
  font-family: "Montserrat", sans-serif;
  border-radius: 15px;
  cursor: pointer;
  overflow: hidden;
  transition:all 0.3s;
}

button.input:hover {
  background-color: #2a2a2a;
}

button.input input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

footer {
  width: 100%;
  margin-top: auto;
  padding: 30px 0;
  border-top: 1.2px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: center;
  gap: 140px;
}

footer > div {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

footer > div > a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #f3f3f3;
  font-family: "Montserrat", sans-serif;
  font-weight: 600;
}

footer > div > a img {
  width: 28px;
  height: 28px;
}

footer ul {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}


footer li a {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: #f3f3f3;
  font-family: "Roboto", sans-serif;
  font-size: 15px;
}

footer li a:hover {
  opacity: 0.8;
}

footer li img {
  width: 18px;
  height: 18px;
}

#github {
  filter:invert(100%);
}

@media (max-width: 768px) {
  body {
    padding: 0;
  }

  .top-container {
    padding: 48px 16px 40px;
  }

  .top-container h1 {
    font-size: 34px;
  }

  .top-container p {
    font-size: 15px;
  }

  .main-container {
    margin-top: 40px;
    padding: 0 16px;
  }

  .main-container p {
    font-size: 26px;
  }

  button.input {
    padding: 32px 24px;
    width: 100%;
    max-width: 320px;
    font-size: 16px;
    border-radius: 12px;
  }

  footer {
    flex-direction: column;
    gap: 40px;
    padding: 24px 16px;
    align-items: center;
  }

  footer > div {
    align-items: center;
    text-align: center;
  }

  footer ul {
    justify-content: center;
  }
}