body {
  margin: 0;
  font-family: Arial;
  background: #f4f6f9;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  padding: 15px 40px;
  background: black;
  color: white;
}

/* HERO */
.hero {
  text-align: center;
  padding: 40px;
  background: #222;
  color: white;
}

/* TOOL */
.tool-box {
  background: white;
  padding: 25px;
  width: 420px;
  margin: 30px auto;
  border-radius: 10px;
}

input, select {
  width: 100%;
  padding: 8px;
}

button {
  padding: 10px;
  background: black;
  color: white;
  border: none;
  cursor: pointer;
}

/* RESULT */
#result {
  margin-top: 20px;
  font-weight: bold;
}

/* NOTE */
.note {
  margin-top: 10px;
  font-size: 12px;
  color: gray;
}

/* CTA */
.cta {
  text-align: center;
  padding: 20px;
}

.whatsapp-btn {
  background: #25D366;
  padding: 10px 20px;
  color: white;
  text-decoration: none;
  border-radius: 6px;
}

/* FOOTER */
footer {
  background: black;
  color: white;
  text-align: center;
  padding: 10px;
}