* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f4f7fb;
  color: #1f2937;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.header {
  margin-bottom: 16px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.header p {
  margin: 0;
  color: #6b7280;
}

.card {
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 4px 20px rgba(17, 24, 39, 0.08);
  margin-bottom: 16px;
}

.label {
  display: inline-block;
  margin-bottom: 8px;
  font-weight: 600;
}

textarea {
  width: 100%;
  min-height: 160px;
  resize: vertical;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  line-height: 1.6;
}

textarea:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.analyze-btn {
  margin-top: 12px;
  border: 0;
  background: #2563eb;
  color: #fff;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 15px;
  cursor: pointer;
}

.analyze-btn:hover {
  background: #1d4ed8;
}

.analyze-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.loading {
  color: #2563eb;
  font-weight: 600;
}

.hidden {
  display: none;
}

.result-card h2 {
  margin-top: 0;
  margin-bottom: 14px;
}

.result-block {
  border-top: 1px solid #e5e7eb;
  padding-top: 12px;
  margin-top: 12px;
}

.result-block:first-of-type {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.result-block h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: #dbeafe;
  color: #1d4ed8;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 13px;
}

.question-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.placeholder {
  color: #9ca3af;
}

@media (max-width: 640px) {
  .container {
    padding: 16px 12px 28px;
  }

  .header h1 {
    font-size: 22px;
  }

  .card {
    padding: 14px;
    border-radius: 10px;
  }

  textarea {
    min-height: 130px;
  }

  .analyze-btn {
    width: 100%;
  }
}