* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #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 {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 25px;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

header p {
  font-size: 1.1rem;
  opacity: 0.9;
}

.calculator {
  display: flex;
  flex-direction: column;
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  gap: 20px;
  margin-bottom: 25px;
}

.input-section {
  display: flex;
  flex-wrap: wrap;
  gap: 25px;
}

.input-group {
  flex: 1;
  min-width: 300px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  color: #2c3e50;
}

input[type="number"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 16px;
}

.radio-group {
  display: flex;
  gap: 20px;
  margin-top: 18px;
}

.radio-option {
  display: flex;
  gap: 10px;
  align-items: center;
}

.radio-option label {
  margin-bottom: 0;
}

.button-group {
  display: flex;
  gap: 20px;
}

button {
  padding: 12px 36px;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

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

.calculate-btn:hover {
  background-color: #2980b9;
}

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

.example-btn:hover {
  background-color: #27ae60;
}

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

.copy-btn:hover {
  background-color: #8e44ad;
}

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

.clear-btn:hover {
  background-color: #c0392b;
}

.result-section {
  padding: 20px;
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 5px;
  display: none;
}

.result-title {
  font-weight: bold;
  margin-bottom: 15px;
  color: #2c3e50;
  font-size: 20px;
}

.result-content {
  display: flex;
  gap: 30px;
}

.result-item {
  text-align: center;
  flex: 1;
}

.result-icon {
  font-size: 80px;
  margin-bottom: 10px;
}

.result-value {
  font-size: 40px;
  font-weight: bold;
  color: #3498db;
  margin-top: 8px;
}

.notice {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 10px 20px;
  border-radius: 5px;
  display: none;
  z-index: 1000;
}

.footer {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  color: #567;
}

.footer-title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 15px;
  color: #2c3e50;
}

.footer ul{
  padding-left: 20px;
}

.footer p, .footer li{
  margin-top: 10px;
}

.footer-content {
  line-height: 1.6;
  margin: 0 auto;
}

.highlight {
  color: #e74c3c;
  font-weight: bold;
}

.method {
  margin-top: 20px;
  background-color: #f9f9f9;
  padding: 15px;
  border-radius: 5px;
}

.method-title {
  font-weight: bold;
  margin-bottom: 10px;
  color: #2c3e50;
}