body {
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 700px;
  margin: 40px auto;
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

h1, h2, h3 {
  color: #1f3c88;
}

.form-label {
  display: block;
  font-size: 0.95rem;
  color: #334155;
  margin-bottom: 6px;
}

input,
select {
  display: block;
  width: 100%;
  padding: 12px;
  margin-bottom: 12px;
  font-size: 16px;
  box-sizing: border-box;
}

select {
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
}

button {
  padding: 12px 18px;
  margin-right: 10px;
  margin-top: 10px;
  border: none;
  background: #1f3c88;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #16306d;
}

.option {
  display: block;
  margin: 10px 0;
}

#timer {
  font-size: 20px;
  font-weight: bold;
  margin: 15px 0;
  color: #c0392b;
}

#message {
  color: red;
  margin-top: 10px;
}
#navigation {
  margin: 20px 0;
}

#navigation button {
  margin: 5px;
  padding: 8px 12px;
}

#navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid #999;
  cursor: pointer;
  font-weight: bold;
}

.nav-btn.answered {
  background-color: green;
  color: white;
}

.nav-btn.unanswered {
  background-color: #dc3545;
  color: white;
}

.nav-btn.active {
  border: 3px solid blue;
}