:root {
  --font-sans: "Inter", "IBM Plex Sans", system-ui, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --ink: #1b2430;
  --muted: #5c6570;
  --line: #dde3ea;
  --paper: #f4f6f8;
  --card: #ffffff;
  --navy: #0f1c2e;
  --accent: #1a6fb0;
  --danger: #9b2c2c;
  --ok: #1f7a4d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea, select { font: inherit; }

pre, code, .mono { font-family: var(--font-mono); }

header {
  background: var(--navy);
  color: #fff;
  padding: 22px 28px;
}

header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
}

header p {
  margin: 6px 0 0;
  color: #c5d0dc;
  font-size: 14px;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  margin-bottom: 16px;
}

h2 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
}

.lede, .hint {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
}

label {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  background: #fff;
  color: var(--ink);
}

textarea { min-height: 220px; resize: vertical; }

.mono-field { font-family: var(--font-mono); font-size: 13px; }

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-size: 14px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 9px 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  cursor: pointer;
}

button.secondary {
  background: #e8eef5;
  color: var(--ink);
}

button.ghost {
  background: transparent;
  color: #d6e2ef;
}

.status {
  margin-top: 10px;
  font-size: 14px;
}

.status.ok { color: var(--ok); }
.status.err { color: var(--danger); }

.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #e7eef6;
  color: var(--navy);
  font-size: 12px;
  font-weight: 600;
}

.template + .template { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }

.preview {
  white-space: pre-wrap;
  background: #f7f9fc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
}

.hidden { display: none; }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  header { padding: 18px 16px; }
}