/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 主体样式 - iOS风格 */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #a8e6cf 0%, #dcedc8 50%, #f1f8e9 100%);
  min-height: 100vh;
  padding: 20px;
  color: #2e7d32;
  line-height: 1.47;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 容器样式 - iOS毛玻璃效果 */
.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(76, 175, 80, 0.15), 0 2px 8px rgba(76, 175, 80, 0.1);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(76, 175, 80, 0.2);
}

/* 头部样式 - iOS风格 */
.header {
  text-align: center;
  margin-bottom: 32px;
}

.title {
  font-size: 2.25rem;
  color: #1b5e20;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  color: #4caf50;
  font-size: 1.0625rem;
  margin-bottom: 24px;
  font-weight: 400;
}

/* 表单样式 - iOS风格 */
.form-section {
  margin-bottom: 32px;
}

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

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #2e7d32;
  font-size: 1rem;
}

.form-input {
  width: 100%;
  padding: 16px;
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.8);
  font-family: inherit;
  backdrop-filter: blur(10px);
}

.form-input:focus {
  outline: none;
  border-color: #4caf50;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.15);
}

.textarea {
  resize: vertical;
  min-height: 120px;
}

.select {
  cursor: pointer;
  appearance: none;
  background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4 5"><path fill="%23666" d="M2 0L0 2h4zm0 5L0 3h4z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 15px center;
  background-size: 12px;
  padding-right: 40px;
}

/* 按钮样式 - iOS风格 */
.btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #4caf50 0%, #66bb6a 100%);
  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(76, 175, 80, 0.3);
}

.btn:hover {
  background: linear-gradient(135deg, #388e3c 0%, #4caf50 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(76, 175, 80, 0.4);
}

.btn:active {
  transform: translateY(0);
  background: linear-gradient(135deg, #2e7d32 0%, #388e3c 100%);
}

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

/* 结果区域样式 - iOS风格 */
.result-section {
  margin-top: 32px;
}

.result-title {
  font-size: 1.25rem;
  color: #1b5e20;
  margin-bottom: 16px;
  text-align: center;
  font-weight: 600;
}

.loading {
  display: none;
  text-align: center;
  color: #4caf50;
  font-style: normal;
  padding: 24px;
  font-weight: 500;
}

.expressions-container {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  padding: 24px;
  min-height: 150px;
  backdrop-filter: blur(10px);
}

.placeholder {
  text-align: center;
  color: #86868B;
  font-style: normal;
  padding: 40px 20px;
  font-weight: 400;
}

/* 表情分组标题样式 - iOS风格 */
.expression-group-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: white;
  margin: 20px 0 12px 0;
  padding: 12px 16px;
  background: linear-gradient(135deg, #4caf50 0%, #66bb6a 100%);
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.expression-group-title:first-child {
  margin-top: 0;
}

/* 表情项样式 - iOS风格 */
.expression-item {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.expression-item:hover {
  border-color: rgba(76, 175, 80, 0.3);
  box-shadow: 0 4px 16px rgba(76, 175, 80, 0.15);
  background: rgba(255, 255, 255, 0.95);
}

.expression-item:last-child {
  margin-bottom: 0;
}

.expression-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  text-align: center;
}

.expression-symbol {
  font-size: 2.5rem;
  margin-bottom: 12px;
  line-height: 1;
}

.expression-info {
  width: 100%;
  text-align: center;
}

.expression-text {
  display: none;
}

.expression-description {
  font-size: 0.9375rem;
  color: #86868B;
  line-height: 1.47;
  margin-bottom: 12px;
}

.copy-btn {
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(76, 175, 80, 0.3);
  margin-top: 8px;
  align-self: center;
}

.copy-btn:hover {
  background: #388e3c;
  transform: translateY(-1px);
}

/* 错误样式 - iOS风格 */
.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);
}

/* 成功提示 - iOS风格 */
.success-toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #34C759;
  color: white;
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(52, 199, 89, 0.3);
  z-index: 1000;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
  font-weight: 600;
  backdrop-filter: blur(20px);
}

.success-toast.show {
  opacity: 1;
  transform: translateX(0);
}

/* 响应式设计 - 移动端优化 */
@media (max-width: 768px) {
  body {
    padding: 16px;
  }
  
  .container {
    padding: 24px;
    border-radius: 20px;
  }
  
  .title {
    font-size: 1.875rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .form-input {
    padding: 14px;
    font-size: 1rem;
  }
  
  .btn {
    padding: 16px;
    font-size: 1rem;
  }
  
  .expressions-container {
    padding: 20px;
  }
  
  .expression-item {
    padding: 16px;
    margin-bottom: 16px;
  }
  
  .expression-content {
    width: 100%;
    margin-bottom: 8px;
  }
  
  .expression-symbol {
    font-size: 3rem;
    margin-bottom: 16px;
  }
  
  .expression-description {
    font-size: 0.875rem;
    margin-bottom: 16px;
    padding: 0 8px;
  }
  
  .copy-btn {
    padding: 10px 20px;
    font-size: 0.875rem;
    margin-top: 12px;
    width: 100%;
  }
}

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

  .container {
    padding: 15px;
  }

  .form-input {
    padding: 10px;
  }

  .expression-item {
    padding: 10px;
  }

  .expression-text {
    font-size: 1rem;
  }

  .expression-description {
    font-size: 0.85rem;
  }

  .expression-symbol {
    font-size: 1.2rem;
  }
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.expression-item {
  animation: fadeIn 0.3s ease;
}

/* 加载动画 */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* 表情符号特殊样式 */
.emoji {
  font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji', sans-serif;
}

.kaomoji {
  font-family: 'SF Mono', 'Monaco', 'Consolas', 'Courier New', monospace;
  font-weight: normal;
}