:root {
  --bg: #0b1020;
  --card: rgba(255,255,255,0.06);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.65);
  --line: rgba(255,255,255,0.14);
  --ok: #4ade80;
  --bad: #fb7185;
  --warn: #fbbf24;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(59,130,246,0.35), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(16,185,129,0.22), transparent 55%),
    radial-gradient(900px 600px at 50% 90%, rgba(251,191,36,0.18), transparent 55%),
    var(--bg);
}

.wrap {
  max-width: 860px;
  padding: 28px 16px;
  margin: 0 auto;
}

.top h1 {
  margin: 0;
  font-size: 32px;
  letter-spacing: 0.2px;
}

.sub {
  margin: 6px 0 18px;
  color: var(--muted);
}

.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin: 14px 0;
}

.row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.row:first-child {
  border-top: 0;
}

.k {
  color: var(--muted);
}

.v {
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 160px 120px;
  gap: 10px;
  align-items: end;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

input {
  height: 38px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  font-family: var(--mono);
}

button {
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.10);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

button:hover {
  background: rgba(255,255,255,0.14);
}

.out {
  margin: 12px 0 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.25);
  min-height: 64px;
  font-family: var(--mono);
  font-size: 13px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.hint {
  margin: 0 0 12px;
  color: var(--muted);
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.foot {
  margin-top: 18px;
}

@media (max-width: 640px) {
  .row {
    grid-template-columns: 1fr;
  }
  .grid {
    grid-template-columns: 1fr;
  }
}