:root {
  --bg: #0b1220;
  --card: #111b2e;
  --text: #eaf0ff;
  --muted: #a8b3d6;
  --border: rgba(255, 255, 255, 0.08);
  --primary: #6ea8fe;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 10% 0%, rgba(110, 168, 254, 0.22), transparent 60%),
              radial-gradient(900px 700px at 100% 10%, rgba(255, 107, 107, 0.12), transparent 55%),
              var(--bg);
  color: var(--text);
}

code { color: #d7e3ff; }

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 16px 56px;
}

.header h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.2px;
}

.subtle {
  margin: 8px 0 0;
  color: var(--muted);
}

.card {
  margin-top: 18px;
  background: rgba(17, 27, 46, 0.75);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  backdrop-filter: blur(10px);
}

.row { display: flex; align-items: center; gap: 12px; }
.row.gap { margin-top: 12px; }
.col { flex: 1; min-width: 0; }

label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  outline: none;
}

input::placeholder { color: rgba(234, 240, 255, 0.45); }

.hint, .meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

button {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(110, 168, 254, 0.35);
  background: rgba(110, 168, 254, 0.16);
  color: var(--text);
  cursor: pointer;
}

button.secondary {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.msg {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  min-height: 18px;
}

.kv { display: flex; gap: 10px; margin: 8px 0; }
.kv .k { width: 110px; color: var(--muted); }
.kv .v { flex: 1; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

.pre {
  margin: 12px 0 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  overflow: auto;
  max-height: 420px;
}