* {
  margin: 0;
  padding: 0;
}

body {
  background: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1560px;
  min-width: 1240px;
  margin: 20px auto;
  color: #333;
}

.container * {
  box-sizing: border-box;
}

header {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 25px;
}

header h1 {
  font-size: 30px;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  margin-bottom: 5px;
}

header p {
  font-size: 16px;
  color: #7f8c8d;
  margin: 0 auto;
}

.tool-container {
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  padding: 20px;
  margin-bottom: 25px;
}

.section-title {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 15px;
}

.section-title span {
  margin-right: 10px;
  font-size: 1.4rem;
}

textarea {
  width: 100%;
  min-height: 200px;
  padding: 15px;
  border: 1px solid #e1e4e8;
  border-radius: 8px;
  font-size: 15px;
  line-height: 1.5;
  resize: vertical;
  transition: border-color 0.3s;
}

textarea:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
}

.btn {
  padding: 12px 36px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-primary:hover {
  background-color: #2980b9;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: #2ecc71;
  color: white;
}

.btn-secondary:hover {
  background-color: #27ae60;
  transform: translateY(-2px);
}

.btn-warning {
  background-color: #e74c3c;
  color: white;
}

.btn-warning:hover {
  background-color: #c0392b;
  transform: translateY(-2px);
}

.btn-info {
  background-color: #9b59b6;
  color: white;
}

.btn-info:hover {
  background-color: #8e44ad;
  transform: translateY(-2px);
}

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 25px;
}

.feature-card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: #2c3e50;
}

.feature-desc {
  color: #7f8c8d;
}

footer {
  text-align: center;
  color: #7f8c8d;
}

.notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #2c3e50;
  color: white;
  padding: 15px 30px;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  font-weight: 500;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.notice.show {
  opacity: 1;
}

.examples {
  padding: 15px;
  background-color: #f8f9fa;
  border-radius: 8px;
  border: 1px solid #ddd;
  border-left: 4px solid #3498db;
  margin-top: 20px;
}

.examples h3 {
  margin-bottom: 10px;
  color: #2c3e50;
}

.example-row {
  display: flex;
  margin-top: 10px;
  color: #7f8c8d;
}

.example-label {
  font-weight: bold;
  color: #666;
  margin-right: 10px;
}