* { box-sizing: border-box; }
*:focus { outline: none; }
body {
  font-family: Arial;
  padding: 50px;
  min-height: 100vh;
  background: linear-gradient(160deg, #7B1F1F 0%, #C0392B 18%, #E74C3C 32%,
              #E67E22 50%, #F39C12 68%, #F7DC6F 84%, #FEF9E7 100%) fixed;
}
.login { margin: 20px auto; width: 300px; }
.login-screen {
  background-color: rgba(255,248,238,0.97);
  padding: 24px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(120,40,0,0.25);
}
.app-title { text-align: center; color: #8B2500; margin-bottom: 0.5em; }
.app-title h1 { font-family: Georgia, serif; font-size: 1.5rem; font-weight: normal; margin: 0; }
.login-form { text-align: center; }
.control-group { margin-bottom: 10px; }
input {
  text-align: center;
  background-color: #fff3e6;
  border: 2px solid transparent;
  border-radius: 5px;
  font-size: 16px;
  font-weight: 200;
  padding: 10px 0;
  width: 250px;
  transition: border .3s;
}
input:focus { border: 2px solid #E67E22; box-shadow: none; }
.btn {
  border: 2px solid transparent;
  background: #C0392B;
  color: #ffffff;
  font-size: 16px;
  line-height: 25px;
  padding: 10px 0;
  text-decoration: none;
  text-shadow: none;
  border-radius: 5px;
  box-shadow: none;
  transition: 0.25s;
  display: block;
  width: 250px;
  margin: 0 auto;
  cursor: pointer;
}
.btn:hover { background-color: #922B21; }