:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --ink: #1b2940;
  --muted: #5f7088;
  --card: #ffffff;
  --line: #d5dfec;
  --brand: #2f6df6;
  --brand-dark: #1f58d6;
  --success: #1b8a53;
  --kv: #8057d8;
  --mono: Consolas, "Courier New", monospace;
  --radius: 14px;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, #dbe8ff 0, transparent 35%),
    radial-gradient(circle at 90% 0%, #e5ddff 0, transparent 35%),
    var(--bg);
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1rem 3rem;
}

.hero {
  margin-bottom: 1.25rem;
}

h1 {
  margin: 0.55rem 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1rem 1.1rem;
  box-shadow: 0 8px 24px rgba(34, 65, 111, 0.08);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(34, 65, 111, 0.13);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.card-copy {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.95rem;
  min-height: 2.4em;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid #bad0ff;
  background: #edf3ff;
  color: #244fba;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-ok {
  border-color: #b8ebcf;
  background: #eafaf1;
  color: var(--success);
}

.badge-kv {
  border-color: #dccfff;
  background: #f4efff;
  color: var(--kv);
}

button {
  margin: 0.6rem 0 0.8rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.18s ease, border-color 0.18s ease;
}

button:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

button.ghost {
  background: #f8fbff;
  border-color: #b8cdf7;
  color: #2257cb;
}

button.ghost:hover {
  background: #edf4ff;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

textarea {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--mono);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  resize: vertical;
}

pre {
  margin: 0;
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem;
  border-radius: 10px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  min-height: 108px;
}