/* Global */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  color: #333;
}

/* Header */
header {
  background: #1da372;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
}

header .logo {
  font-size: 20px;
  font-weight: bold;
}

header nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 20px;
  font-weight: 500;
}

header nav a:hover,
header nav a.active {
  text-decoration: underline;
}

/* Container */
.container {
  padding: 30px;
  max-width: 700px;
  margin: auto;
}

h1 {
  color: #1da372;
  margin-bottom: 15px;
}

/* Tool Box */
.tool-box {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.08);
}

.tool-box input {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

.buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

button {
  background: #1da372;
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
}

button:hover {
  background: #148a5c;
}

/* Output */
.output {
  background: #f1f1f1;
  border-radius: 6px;
  padding: 10px;
  font-family: monospace;
  white-space: pre-wrap;
  min-height: 40px;
}