* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f3f6fb;
  color: #172033;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 560px;
  background: white;
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 12px 35px rgba(0,0,0,0.08);
}

.hero {
  text-align: center;
}

h1 {
  margin-top: 0;
  font-size: 32px;
}

.muted {
  color: #657084;
}

form {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cfd6e4;
  border-radius: 10px;
  font-size: 16px;
}

.button {
  display: inline-block;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  background: #1f5eff;
  color: white;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.result {
  margin-top: 18px;
  white-space: pre-wrap;
  background: #0f172a;
  color: #e5e7eb;
  padding: 14px;
  border-radius: 12px;
  min-height: 52px;
  overflow-x: auto;
}