:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1c2434;
  --muted: #60708a;
  --line: #d8deea;
  --primary: #2157ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

.wrap {
  max-width: 980px;
  margin: 24px auto;
  padding: 0 16px;
}

h1 { margin: 0 0 8px; font-size: 26px; }
.sub { margin: 0 0 16px; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.inline-label {
  color: var(--muted);
}

.worker-input {
  width: 180px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.image-box {
  margin: 14px 0;
  min-height: 120px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: #fafbfd;
}

#captcha-img {
  max-width: 100%;
  max-height: 220px;
  display: none;
}

.form-row {
  display: grid;
  gap: 8px;
}

#label-input {
  width: 100%;
  font-size: 22px;
  text-transform: uppercase;
  text-align: center;
  letter-spacing: 1px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  background: #fff;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-secondary { background: #eef2ff; }
.stats { color: var(--muted); }
.msg { color: var(--muted); }
.msg.ok { color: #0a7a2f; }
.msg.err { color: #b82020; }