body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--gray-bg);
  padding: 30px;
}
/* Tool Page */
.tool-section {
  padding: 60px 16px;
}
.container {
  max-width: 700px;
  background: var(--white-bg);
  margin: auto;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

h1 {
  text-align: center;
  color: var(--black-text);
  margin-bottom: 10px;
}

.desc {
  text-align: center;
  color: var(--gray-text);
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 18px;
}

label {
  font-weight: bold;
  color: var(--black-text);
  display: block;
  margin-bottom: 6px;
}

.tool-section input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--black-text);
  background: var(--white-bg);
  color: var(--black-text);
  font-size: 16px;
  box-sizing: border-box;
}

.tool-section button {
  width: 100%;
  padding: 14px;
  font-size: 18px;
  border: none;
  border-radius: 10px;
  background: #0077cc;
  color: white;
  cursor: pointer;
}

#calculateBtn:hover {
  background: #005fa3;
}

.result-box {
  margin-top: 20px;
  padding: 18px;
  background: #eef7ff;
  border-left: 5px solid #0077cc;
  border-radius: 10px;
}

.result-box p {
  margin: 10px 0;
  font-size: 18px;
}