* {
  margin: 0;
  padding: 0;
}

body {
  background: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1560px;
  min-width: 1240px;
  margin: 25px auto;
  color: #333;
}

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

header {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}

header h1 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 10px;
}

header p {
  font-size: 16px;
  opacity: 0.85;
}

.tool-container {
  display: flex;
  gap: 20px;
  margin-bottom: 25px;
}

.input-section,
.output-section {
  flex: 1;
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  padding: 20px;
}

.section-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}

textarea {
  width: 100%;
  height: 320px;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  resize: none;
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 15px;
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  padding: 14px 32px;
  background-color: #4a6baf;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
  display: flex;
  align-items: center;
  gap: 5px;
}

button:hover {
  background-color: #3a5a9f;
}

button.secondary {
  background-color: #6c757d;
}

button.secondary:hover {
  background-color: #5a6268;
}

.notice {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 10px 20px;
  border-radius: 4px;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s;
}

.notice.show {
  opacity: 1;
}

footer {
  width: 100%;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-section {
  flex: 1;
  min-width: 300px;
  background: #fff;
  padding: 15px;
  border-radius: 12px;
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
}

.info-item {
  margin-top: 10px;
  opacity: 0.8;
}

.error {
  color: #d32f2f;
  font-size: 14px;
  margin-top: 5px;
}