* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}

.header {
  background: #4a6ee0;
  color: #fff;
  padding: 30px;
  text-align: center;
}

.header h1 {
  font-size: 28px;
  margin-bottom: 10px;
}

.content {
  padding: 22px;
}

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #333;
}

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

.input-group input {
  flex: 1;
  padding: 15px 20px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 16px;
}

.input-group input:focus {
  outline: none;
  border-color: #4a6ee0;
}

.check-button {
  background: #4a6ee0;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 15px 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  min-width: 120px;
}

.check-button:hover:not(:disabled) {
  background: #3a5ed0;
}

.check-button:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.status-info {
  background: #e8f4ff;
  border-radius: 10px;
  padding: 15px;
  margin: 10px 0;
  font-size: 13px;
  color: #2c5282;
}

.error-message {
  background: #ffeaea;
  border-left: 5px solid #ff4757;
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 20px;
  color: #ff4757;
  display: none;
}

.results {
  margin-top: 14px;
  display: none;
}

.result-card {
  background: #f8f9fa;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 10px;
  border-left: 4px solid #4a6ee0;
}

.result-card h3 {
  color: #333;
  margin-bottom: 6px;
  font-size: 14px;
}

.result-content {
  line-height: 1.4;
  color: #555;
  margin-bottom: 6px;
  font-size: 12px;
}

pre {
  background: #2d3748;
  color: #e2e8f0;
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin-top: 10px;
  font-size: 12px;
  max-height: 280px;
  overflow-y: auto;
}

.port-status {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.port-item {
  min-width: 0;
  padding: 8px;
  border-radius: 8px;
  border: 2px solid #e0e0e0;
  background: #f8f9fa;
  color: #333;
  font-size: 12px;
}

.port-open {
  border-color: #28a745;
  background: #f0fff4;
}

.port-closed {
  border-color: #dc3545;
  background: #fff5f5;
}

.info-box {
  background: #e8f4ff;
  border-radius: 10px;
  padding: 12px;
  margin-top: 12px;
  font-size: 12px;
  color: #2c5282;
}

.info-box h3 {
  margin-bottom: 6px;
  font-size: 13px;
}

#locations-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.compact-card {
  margin-bottom: 0;
}

@media (max-width: 600px) {
  .content {
    padding: 20px;
  }

  .input-group {
    flex-direction: column;
  }

  .check-button {
    width: 100%;
  }

  #locations-results {
    grid-template-columns: 1fr;
  }
}