body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to bottom right, #ebfff6, #dceeff);
  min-height: 100vh;
}

.container {
  /* background: white; */
  /* border-radius: 12px; */
  /* box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); */
  /* padding: 2rem; */
  /* text-align: left; */
  max-width: 600px !important;
  margin: 40px auto;
}

.back-link {
  text-decoration: none;
  color: #10b981;
  font-weight: 500;
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.icon-wrapper {
  font-size: 2.8rem;
  color: #10b981;
  margin-bottom: 0.5rem;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.subheading {
  color: #555;
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

form h3 {
  text-align: left;
  font-size: 1rem;
  margin-bottom: 1rem;
  color: #111827;
}

.radio-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 1rem;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  margin-bottom: 1rem;
  cursor: pointer;
  transition: border 0.2s, background 0.2s;
}

.radio-box:hover {
  background: #f9fafb;
  border-color: #9ca3af;
}

.radio-box input[type="radio"] {
  margin-top: 4px;
  accent-color: #10b981;
}

.radio-box div span {
  font-size: 0.85rem;
  color: #6b7280;
}

button#startBtn {
  width: 100%;
  background: #10b981;
  border: none;
  color: white;
  font-weight: 600;
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.3s;
}

button#startBtn:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}