*{
  margin: 0;
  padding: 0;
}

body {
  background-color: #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 {
  text-align: center;
  margin-bottom: 25px;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 5px;
}

header  p{
  font-size: 1rem;
  opacity: 0.9;
  max-width: 95%;
  margin: 0 auto;
}

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

.input-section,
.output-section {
  flex: 1;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: #2c3e50;
  display: flex;
  align-items: center;
  gap: 10px;
}

.format-selector {
  margin-bottom: 20px;
}

.format-label {
  font-weight: 500;
  margin-bottom: 10px;
  display: block;
  color: #444;
}

.format-options {
  display: flex;
  gap: 20px;
}

.format-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  background: #f8f9fa;
  border-radius: 8px;
  cursor: pointer;
  border: 2px solid #e9ecef;
  transition: all 0.3s ease;
}

.format-option:hover {
  background: #e9f7fe;
  border-color: #c5e6f6;
}

.format-option.active {
  background: #e1f0fa;
  border-color: #3498db;
  color: #2980b9;
  font-weight: 500;
}

.format-option input {
  display: none;
}

textarea {
  width: 100%;
  height: 385px;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  resize: vertical;
  background: #fcfcfc;
}

#json-output{
    height: 485px;
}

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

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 20px;
}

.btn {
  padding: 12px 35px;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  font-size: 15px;
}

.btn-primary {
  background: linear-gradient(135deg, #3498db, #2980b9);
  color: white;
}

.btn-secondary {
  background: #f8f9fa;
  border: 1px solid #ddd;
  color: #444;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2980b9, #3498db);
}

.btn-secondary:hover {
  background: #e9ecef;
}

.notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 15px 35px;
  border-radius: 50px;
  font-size: 15px;
  z-index: 1000;
  display: none;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.features {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 25px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.features h2 {
  font-size: 1.4rem;
  margin-bottom: 25px;
  color: #2c3e50;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
}

.feature-card {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 10px;
  border-left: 4px solid #3498db;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 15px;
  color: #2c3e50;
  display: flex;
  align-items: center;
  gap: 10px;
}

.instructions {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 25px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.instructions h2 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: #2c3e50;
}

.steps {
  counter-reset: step-counter;
  margin: 0 auto;
}

.step {
  position: relative;
  padding-left: 70px;
  margin-top: 25px;
}

.step:before {
  counter-increment: step-counter;
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  background: #3498db;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: bold;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: #2c3e50;
}

footer {
  text-align: center;
  color: #7f8c8d;
  font-size: 0.95rem;
}

.highlight {
  background: #fff9c4;
  padding: 2px 5px;
  border-radius: 4px;
  font-weight: 500;
}