body {
  font-family: system-ui, sans-serif;
  background: #f8fafc;
  margin: 0;
  padding: 0;
  color: #0f172a;
}
.container {
  max-width: 720px;
  margin: auto;
  padding: 20px;
}
h1 {
  text-align: center;
  margin-bottom: 20px;
}
.tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
.tab-button {
  flex: 1;
  padding: 10px;
  cursor: pointer;
  border: none;
  background: #e2e8f0;
  font-weight: bold;
}
.tab-button.active {
  background: #0ea5a4;
  color: white;
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}
label {
  display: block;
  margin-top: 10px;
  font-weight: 500;
}
input, select {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
}
button {
  width: 100%;
  margin-top: 15px;
  padding: 10px;
  background: #0ea5a4;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}
button:hover {
  background: #0d9488;
}
.result-box {
  background: #1e293b;
  color: #f8fafc;
  padding: 15px;
  border-radius: 8px;
  margin-top: 15px;
  font-size: 14px;
}
.result-blue {
  background: #dbeafe;
  color: #1e3a8a;
  padding: 8px;
  border-radius: 6px;
  margin-top: 8px;
}
.result-orange {
  background: #ffedd5;
  color: #9a3412;
  padding: 8px;
  border-radius: 6px;
  margin-top: 8px;
}
