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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #87CEEB 0%, #98FB98 100%);
  min-height: 100vh;
  padding: 20px;
  color: #1D1D1F;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.header {
  text-align: center;
  margin-bottom: 32px;
}

.title {
  font-size: 2.25rem;
  color: #1D1D1F;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  color: #86868B;
  font-size: 1.0625rem;
  margin-bottom: 24px;
  font-weight: 400;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #1D1D1F;
  font-size: 1rem;
}

.form-input {
  width: 100%;
  padding: 16px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.8);
  text-align: center;
  backdrop-filter: blur(10px);
}

.form-input:focus {
  outline: none;
  border-color: #007AFF;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.btn {
  width: 100%;
  padding: 16px;
  background: #007AFF;
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1.0625rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
}

.btn:hover {
  background: #0056CC;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.35);
}

.btn:active {
  transform: translateY(0);
  background: #004499;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  background: #86868B;
}

.result-section {
  margin-top: 32px;
}

.result-title {
  font-size: 1.25rem;
  color: #1D1D1F;
  margin-bottom: 20px;
  text-align: center;
  font-weight: 600;
}

.loading {
  display: none;
  text-align: center;
  color: #007AFF;
  font-style: normal;
  margin-bottom: 20px;
  font-weight: 500;
}

.result-container {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.result-card {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.2s ease;
  backdrop-filter: blur(10px);
}

.result-card:hover {
  border-color: rgba(0, 122, 255, 0.3);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.1);
  background: rgba(255, 255, 255, 0.8);
}

.card-title {
  font-size: 1.0625rem;
  color: #1D1D1F;
  margin-bottom: 16px;
  text-align: center;
  font-weight: 600;
}

.score-display {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.score-desc {
  text-align: center;
  color: #86868B;
  font-size: 0.9375rem;
  line-height: 1.47;
  font-weight: 400;
}

.meaning-content {
  color: #1D1D1F;
  line-height: 1.6;
  font-size: 1rem;
  text-align: left;
  white-space: pre-wrap;
  font-weight: 400;
}

.error {
  color: #FF3B30;
  background: rgba(255, 59, 48, 0.1);
  border: 1px solid rgba(255, 59, 48, 0.2);
  padding: 16px;
  border-radius: 12px;
  margin-top: 16px;
  font-weight: 500;
  backdrop-filter: blur(10px);
}

/* 平板和桌面端优化 */
@media (min-width: 768px) {
  .result-container {
    grid-template-columns: 1fr 1fr;
  }
  
  .result-card:last-child {
    grid-column: 1 / -1;
  }
}

/* 手机端优化 */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .container {
    padding: 20px;
    margin: 10px;
  }

  .title {
    font-size: 2rem;
  }

  .form-input {
    padding: 12px;
  }

  .btn {
    padding: 12px;
  }

  .result-card {
    padding: 15px;
  }

  .score-display {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .title {
    font-size: 1.8rem;
    letter-spacing: 1px;
  }

  .container {
    padding: 15px;
  }

  .result-card {
    padding: 12px;
  }

  .score-display {
    font-size: 1.8rem;
  }

  .meaning-content {
    font-size: 0.9rem;
  }
}