* {
  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;
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 25px;
}

.panel {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #2c3e50;
}

.settings {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 25px;
}

.setting-group {
  display: flex;
  flex-direction: column;
}

label {
  margin-bottom: 8px;
  font-weight: 600;
  color: #2c3e50;
  display: flex;
  align-items: center;
  gap: 8px;
}

select,
input[type="number"] {
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

select:focus,
input[type="number"]:focus {
  border-color: #3498db;
  outline: none;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

textarea {
  width: 100%;
  min-height: 350px;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
  resize: vertical;
  transition: border-color 0.3s;
}

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

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.btn {
  padding: 14px 10px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #3498db, #2c3e50);
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, #2ecc71, #27ae60);
  color: white;
}

.btn-warning {
  background: linear-gradient(135deg, #f39c12, #e67e22);
  color: white;
}

.btn-info {
  background: linear-gradient(135deg, #9b59b6, #8e44ad);
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  color: white;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
  transform: translateY(1px);
}

.output-container {
  position: relative;
}

.copy-indicator {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(46, 204, 113, 0.9);
  color: white;
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.features-section {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  margin-bottom: 25px;
}

.features-title {
  text-align: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: #2c3e50;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: #f8f9fa;
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  border: 1px solid #eee;
  transition: transform 0.3s ease;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: #3498db;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: #2c3e50;
}

.feature-desc {
  color: #555;
  line-height: 1.6;
}

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

.notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(44, 62, 80, 0.95);
  color: white;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1rem;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.notice.show {
  opacity: 1;
}

.usage-examples {
  margin-top: 20px;
  padding: 20px;
  background: #f8f9fa;
  border-radius: 10px;
}

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

.example {
  background: white;
  padding: 15px;
  border-left: 4px solid #3498db;
  margin-bottom: 15px;
  border-radius: 0 8px 8px 0;
}

.example-header {
  font-weight: bold;
  margin-bottom: 8px;
  color: #3498db;
}

.example-code {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.9rem;
  color: #2c3e50;
}

.hidden {
  display: none;
}