:root {
  --bg: #f7f7fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --border: #e5e7eb;
  --ok: #10b981;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 920px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.02), 0 2px 8px rgba(0, 0, 0, 0.04);
}

h1 {
  font-size: 1.25rem;
  margin: 0 0 8px;
}

p.lead {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin: 12px 0;
}

legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

label {
  display: block;
  margin: 6px 0;
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.inline {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.preset-row {
  margin: 8px 0 4px;
  gap: 8px;
}

.action-row {
  gap: 8px;
  margin-bottom: 6px;
}

.hint-tight {
  margin: 6px 0 2px;
}

.footer-offset {
  margin-top: 12px;
}

input[type="text"],
input[type="url"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

textarea {
  min-height: 180px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
}

.btn {
  background: var(--primary);
  color: #fff;
  border: 0;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover {
  background: var(--primary-600);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

details {
  margin-top: 6px;
}

.hint {
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-center {
  text-align: center;
}

.foot-line {
  margin: 4px 0;
}

.outputs {
  display: grid;
  gap: 12px;
}

.output-block {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}

.output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.output-head h3 {
  margin: 0;
  font-size: 1rem;
}

.format-desc {
  display: block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
}

.output-block textarea {
  width: 100%;
  min-height: 180px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
}

@media (max-width: 600px) {
  .wrap {
    margin: 16px auto;
  }

  .card {
    padding: 12px;
  }

  h1 {
    font-size: 1.1rem;
  }

  .output-block textarea {
    min-height: 150px;
  }
}