:root {
  --bg: #0f1419;
  --panel: #171d24;
  --border: #262f3a;
  --fg: #e6edf3;
  --muted: #8b98a5;
  --accent: #3b82f6;
  --danger: #ef4444;
  --success: #22c55e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
.wrap { max-width: 560px; margin: 0 auto; padding: 24px 16px 48px; }
.head h1 { margin: 0 0 4px; font-size: 22px; }
.sub { margin: 0 0 16px; color: var(--muted); font-size: 13px; }
.tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.tab {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: transparent; color: var(--muted); cursor: pointer;
  font-size: 13px; text-decoration: none;
}
.tab.active { color: var(--fg); border-color: var(--accent); background: rgba(59,130,246,.12); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.hidden { display: none !important; }
.field { margin-bottom: 14px; }
.field > label { display: block; margin-bottom: 4px; font-size: 13px; color: var(--muted); }
input[type=text], input[type=file], textarea, select {
  width: 100%; padding: 8px 10px; background: #0d1117; color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px; font: inherit;
}
textarea { resize: vertical; min-height: 80px; }
textarea:focus { outline: none; border-color: var(--accent); }
.textarea-wrapper { position: relative; }
.check { display: flex; align-items: center; gap: 6px; color: var(--fg); font-size: 13px; }
.check input { width: auto; }
.hint { margin: 4px 0 0; font-size: 12px; color: var(--muted); }
button.primary, button.ghost, button.danger, button.paste-btn {
  padding: 8px 14px; border-radius: 6px; border: 1px solid transparent;
  font: inherit; cursor: pointer; font-size: 13px;
}
button.primary { background: var(--accent); color: #fff; width: 100%; }
button.primary:disabled { opacity: .6; cursor: not-allowed; }
button.ghost { background: transparent; border-color: var(--border); color: var(--fg); }
button.ghost:hover { background: rgba(255,255,255,.05); }
button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: rgba(239,68,68,.1); }
button.paste-btn {
  position: absolute; right: 10px; bottom: 8px;
  padding: 4px 10px; font-size: 12px; background: var(--border);
  color: var(--fg); border: 1px solid var(--border); border-radius: 4px;
}
button.paste-btn:hover { background: var(--accent); border-color: var(--accent); }
.row { display: flex; gap: 10px; margin: 10px 0; }
.row-2 { display: flex; gap: 12px; margin-bottom: 16px; }
.row-2 .field { flex: 1; margin-bottom: 0; }
.error { color: var(--danger); min-height: 20px; margin: 8px 0 0; font-size: 13px; }
.result { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.result-label { margin: 0; color: var(--muted); font-size: 12px; }
.code {
  margin: 4px 0 6px; font-size: 32px; letter-spacing: 6px; font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.file-item { margin: 8px 0; }
pre.text-out {
  white-space: pre-wrap; word-break: break-word; background: #0d1117;
  border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin: 8px 0;
  max-height: 240px; overflow: auto; font-size: 13px;
}
.dl { display: inline-block; padding: 8px 14px; border-radius: 6px; background: var(--accent); color: #fff; text-decoration: none; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat { background: #0d1117; border: 1px solid var(--border); border-radius: 6px; padding: 10px; }
.stat b { display: block; font-size: 18px; }
.stat span { color: var(--muted); font-size: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; padding: 6px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } .code { font-size: 28px; letter-spacing: 4px; } .wrap { padding: 16px 12px 32px; } }