* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans', sans-serif;
  background: #f5f5f5;
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 600px;
}

.card {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 16px;
  padding: 40px 30px;
  text-align: center;
}

.icon {
  font-size: 64px;
  margin-bottom: 20px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

h1 {
  font-size: 24px;
  margin-bottom: 20px;
  font-weight: 600;
}

#nextBtn {
  background: #000;
  color: #fff;
  border: none;
  padding: 14px 40px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
}

#nextBtn:active {
  transform: scale(0.95);
  opacity: 0.8;
}

.suggestion-content {
  margin-bottom: 0;
}

.detail-heading {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #888;
  margin-bottom: 12px;
}

.suggestion {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 30px;
  min-height: 100px;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 12px;
  opacity: 0;
  animation: fadeIn 0.5s ease forwards;
  text-align: left;
}

.curriculum-step {
  margin-bottom: 16px;
  padding: 12px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  text-align: left;
}

.curriculum-step:last-child {
  margin-bottom: 0;
}

.step-week {
  font-size: 11px;
  font-weight: 700;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.step-topic {
  font-size: 14px;
  font-weight: 600;
  color: #000;
  margin-bottom: 6px;
}

.step-details {
  margin: 0;
  padding-left: 20px;
  list-style-type: disc;
}

.step-details li {
  font-size: 13px;
  color: #333;
  margin-bottom: 3px;
  line-height: 1.4;
}

.step-details li:last-child {
  margin-bottom: 0;
}

.prompt-example {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 30px;
  padding: 16px 20px;
  background: #e3f2fd;
  border-left: 3px solid #2196f3;
  border-radius: 8px;
  opacity: 0;
  animation: fadeIn 0.5s ease forwards 0.1s;
  text-align: center;
  color: #1565c0;
  font-weight: 600;
}

.controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

#topicSelect {
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  font-family: 'Noto Sans', sans-serif;
  min-width: 200px;
}

#topicSelect:focus {
  outline: 2px solid #000;
  outline-offset: 2px;
}

@keyframes fadeIn {
  to { opacity: 1; }
}