:root {
  --bg: #f4f7ff;
  --card: #ffffff;
  --text: #10223d;
  --subtle: #486086;
  --primary: #1257e0;
  --border: #d9e3f7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "SF Pro Text", system-ui, sans-serif;
  background: radial-gradient(circle at top right, #dbe8ff, var(--bg) 40%);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 20px;
}

.hero h1 {
  margin: 0;
  font-size: 2rem;
}

.hero p {
  margin: 8px 0 0;
  color: var(--subtle);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 12px 30px rgba(18, 87, 224, 0.08);
}

h2 {
  margin-top: 0;
}

label {
  display: block;
  margin: 10px 0 6px;
  font-weight: 600;
}

textarea,
select,
button,
.button {
  width: 100%;
  border: 1px solid #bfd0f5;
  border-radius: 10px;
  padding: 10px;
  font: inherit;
}

textarea,
select {
  background: #fff;
}

.row {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.row.split {
  grid-template-columns: repeat(3, 1fr);
}

button,
.button {
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.button.secondary {
  background: #223b64;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.result {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #f9fbff;
}

pre {
  margin: 0;
  white-space: pre-wrap;
}

.status {
  margin: 12px 0 0;
  color: var(--subtle);
}

.note {
  color: var(--subtle);
}

@media (max-width: 760px) {
  .actions,
  .row.split {
    grid-template-columns: 1fr;
  }
}