body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
  color: #333;
}

header {
  background: #222;
  color: white;
  padding: 25px 20px;
  text-align: center;
}

header h1 {
  margin: 0 0 10px;
}

header p {
  margin: 0;
}

.wrapper {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 20px;
}

.card {
  background: white;
  padding: 30px 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  margin-bottom: 25px;
  text-align: center;
}

input {
  padding: 12px;
  margin: 10px;
  width: 220px;
  max-width: 90%;
  font-size: 16px;
}

button {
  padding: 12px;
  margin: 10px;
  width: 220px;
  max-width: 90%;
  font-size: 16px;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 6px;
}

.calc-btn {
  background: #1ECD0C;
}

.calc-btn:hover {
  opacity: 0.9;
}

.home-btn {
  background: #007BFF;
}

.home-btn:hover {
  background: #0056b3;
}

.button-row {
  text-align: center;
  margin-top: 20px;
}

.result {
  font-size: 20px;
  margin-top: 20px;
  font-weight: bold;
  line-height: 1.6;
}

.info {
  margin-top: 25px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
  line-height: 1.6;
  text-align: left;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.tool-box {
  display: block;
  background: white;
  padding: 25px;
  border-radius: 10px;
  text-decoration: none;
  color: #333;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  font-weight: bold;
}

.tool-box:hover {
  background: #eee;
}

footer {
  text-align: center;
  padding: 25px;
  margin-top: 30px;
  background: #222;
  color: white;
}

footer p {
  margin: 5px 0;
}

footer a {
  color: white;
  text-decoration: none;
  margin: 0 5px;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .wrapper {
    margin: 20px auto;
    padding: 0 12px;
  }

  .card {
    padding: 25px 15px;
  }

  input,
  button {
    width: 90%;
  }
}