body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
}
.header {
  display: flex;
  align-items: center;
  background: #0078d7;
  color: white;
  padding: 15px;
}
.header img {
  height: 50px;
  margin-right: 15px;
}
.container {
  max-width: 800px;
  margin: 20px auto;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.question {
  display: none;
}
.question.active {
  display: block;
}
.options label {
  display: block;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
  margin-bottom: 10px;
  cursor: pointer;
}
input[type="radio"] {
  display: none;
}
input[type="radio"]:checked + label {
  background: #0078d7;
  color: white;
}
#result {
  text-align: center;
  font-size: 20px;
  font-weight: bold;
  margin-top: 20px;
}
.header h1 {
  margin: 0;
  font-size: 24px;
}
h2,
.timer {
  text-align: center;
}
.timer {
  font-size: 18px;
  font-weight: bold;
  color: #d9534f;
}
form label {
  display: block;
  margin-bottom: 10px;
  font-weight: bold;
}
form input[type="text"],
form input[type="password"] {
  width: calc(100% - 20px);
  padding: 10px;
  margin: 5px 0 20px 0;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 16px;
  transition: border-color 0.3s;
}
form input[type="text"]:focus,
form input[type="password"]:focus {
  border-color: #0078d7;
  outline: none;
}
form button,
.nav-buttons button,
.submit-button button {
  background-color: #0078d7;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}
form button:hover,
.nav-buttons button:hover,
.submit-button button:hover {
  background-color: #005fa3;
}
.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}
.nav-buttons button:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}
.submit-button {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.alert-box{
  margin:1rem 0;
  padding:1rem 1.5rem;
  background:#fef2f2;
  color:#b91c1c;
  border-left:5px solid #f43f5e;
  border-radius:.5rem;
  font-size:.95rem;
  position:relative;
}
.alert-box h3{margin:0 0 .5rem;font-size:1.1rem}
.alert-box ul{margin:0;padding-left:1.2rem}
.alert-box li{line-height:1.4}
.alert-box .close-btn{
  position:absolute;
  top:.4rem;
  right:.7rem;
  background:none;
  border:none;
  font-size:1.3rem;
  cursor:pointer;
  color:#b91c1c;
}

body {
  -webkit-user-select: none;   /* Chrome, Safari */
  -moz-user-select: none;      /* Firefox */
  -ms-user-select: none;       /* IE 10+ */
  user-select: none;           /* Standard */
}