body{
  font-family: Arial, sans-serif;
  max-width: 900px;
  margin: 20px auto;
  padding: 0 15px;
  background:#f8fafc;
  color:#111827;
}

h1{
  color:#2563eb;
  font-size:32px;
}

h2{
  margin-top:0;
}

.card{
  background:white;
  border:1px solid #ddd;
  border-radius:10px;
  padding:16px;
  margin-bottom:14px;
  box-shadow:0 1px 3px rgba(0,0,0,0.05);
}

.passage-box{
  line-height:1.6;
}

.question-card{
  transition:0.2s;
}

.answer-line{
  display:block;
  padding:8px;
  margin:5px 0;
  border:1px solid #e5e7eb;
  border-radius:6px;
  cursor:pointer;
}

.answer-line:hover{
  background:#f1f5f9;
}

.feedback{
  margin-top:12px;
  padding-top:10px;
  border-top:1px dashed #ddd;
}

.correct-card{
  border-color:#22c55e;
  background:#f0fdf4;
}

.wrong-card{
  border-color:#ef4444;
  background:#fef2f2;
}

.correct-text{
  color:#15803d;
  font-weight:bold;
}

.wrong-text{
  color:#b91c1c;
  font-weight:bold;
}

.main-btn{
  padding:10px 18px;
  border:none;
  border-radius:8px;
  background:#2563eb;
  color:white;
  font-size:16px;
  cursor:pointer;
  margin:5px 5px 5px 0;
}

.main-btn:disabled{
  background:#9ca3af;
  cursor:not-allowed;
}

.secondary-btn{
  background:#64748b;
}

.score-box{
  border-color:#2563eb;
}

.loading{
  color:#666;
}

@media(max-width:600px){
  body{
    margin:10px auto;
    padding:0 10px;
  }

  h1{
    font-size:26px;
  }

  .card{
    padding:13px;
  }
}

.result-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
}

.result-table th,
.result-table td{
  border:1px solid #e5e7eb;
  padding:8px;
  text-align:left;
}

.result-table th{
  background:#eff6ff;
  color:#1e40af;
}

.result-table tr:nth-child(even){
  background:#f8fafc;
}

.small-btn{
  padding:6px 10px;
  border:none;
  border-radius:6px;
  background:#2563eb;
  color:white;
  cursor:pointer;
}

select,
input{
  border:1px solid #cbd5e1;
  border-radius:6px;
  padding:8px;
}