* {
  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 .description {
  font-size: 1rem;
  opacity: 0.9;
  max-width: 95%;
  margin: 0 auto;
}

.main{
  display: flex;
  gap: 25px;
  margin-bottom: 25px;
}

.panel {
  flex: 1;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.panel-header {
  background: #f8f9fa;
  padding: 15px;
  border-bottom: 1px solid #e9ecef;
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #495057;
}

textarea {
  flex: 1;
  padding: 15px;
  min-height: 350px;
  max-height: 600px;
  font-size: 1rem;
  line-height: 1.7;
  border: none;
  outline: none;
  resize: none;
  background: white;
}

textarea::placeholder {
  color: #adb5bd;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 1.5rem;
  background: #f8f9fa;
  border-top: 1px solid #e9ecef;
}

.btn {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: #4a90e2;
  color: white;
}

.btn-primary:hover {
  background: #3a7bc8;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: #5a6268;
  transform: translateY(-2px);
}

.btn-success {
  background: #28a745;
  color: white;
}

.btn-success:hover {
  background: #218838;
  transform: translateY(-2px);
}

.btn-danger {
  background: #dc3545;
  color: white;
}

.btn-danger:hover {
  background: #c82333;
  transform: translateY(-2px);
}

.info-section {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  margin-bottom: 25px;
}

.info-section h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #343a40;
  border-bottom: 2px solid #e9ecef;
  padding-bottom: 0.5rem;
}

.info-content {
  line-height: 1.8;
}

.info-content p {
  margin-top: 10px;
  font-size: 1rem;
}

.notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-size: 1.1rem;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.notice.show {
  opacity: 1;
}

footer {
  text-align: center;
  color: #6c757d;
  font-size: 0.95rem;
}

.counter {
  background: #e9ecef;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-left: auto;
}