:root {
  --bg: #0b0f14;
  --card: #121826;
  --text: #e7edf7;
  --muted: #a9b4c4;
  --border: #263042;
  --btn: #2b6cff;
  --btnText: #ffffff;
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.header { margin-bottom: 18px; }
h1 { margin: 0 0 8px 0; font-size: 28px; }
.sub { margin: 0; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin: 14px 0;
}

.label { display: block; margin-bottom: 8px; color: var(--muted); }

.textarea {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0f1420;
  color: var(--text);
  resize: vertical;
}

.row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.row-between { justify-content: space-between; align-items: center; }

.btn {
  background: var(--btn);
  color: var(--btnText);
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.status { margin: 10px 0 0; color: var(--muted); min-height: 18px; }

.output {
  background: #0f1420;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
  min-height: 180px;
}

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }
.h2 { margin: 0; font-size: 16px; color: var(--muted); }
.footer { margin-top: 10px; }
.small { color: var(--muted); font-size: 12px; }