:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 2rem 1.5rem 1rem;
  border-bottom: 1px solid var(--line);
}

header h1 { margin: 0; font-size: 1.6rem; }
header .sub { margin: .25rem 0 0; color: var(--muted); }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  gap: 1.25rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem;
}

.card h2 { margin: 0 0 .75rem; font-size: 1.1rem; }

.kv, .routes { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }

.kv li { display: flex; justify-content: space-between; gap: 1rem; }
.kv span { color: var(--muted); }

.routes li { display: flex; justify-content: space-between; gap: 1rem; }
.routes span { color: var(--muted); font-size: .9rem; }

code {
  background: #0b1220;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .1rem .4rem;
  font-size: .85rem;
  color: var(--accent);
}

.hint { color: var(--muted); font-size: .85rem; margin: .75rem 0 0; }

form { display: grid; gap: .75rem; }
label { display: grid; gap: .25rem; font-size: .9rem; color: var(--muted); }

input, textarea {
  background: #0b1220;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .6rem .7rem;
  color: var(--text);
  font: inherit;
}

input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

button {
  justify-self: start;
  background: var(--accent);
  color: #04212f;
  border: 0;
  border-radius: 8px;
  padding: .6rem 1.2rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover { filter: brightness(1.1); }

.result {
  margin: .75rem 0 0;
  background: #0b1220;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .75rem;
  white-space: pre-wrap;
  font-size: .85rem;
}

footer {
  text-align: center;
  color: var(--muted);
  padding: 1.5rem;
  font-size: .85rem;
}