:root {
  --bg: #0d1016;
  --card: #141a24;
  --text: #f0f3ff;
  --muted: #9ba6be;
  --accent: #6af8cf;
  --danger: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Noto Sans SC', sans-serif;
  background: radial-gradient(circle at 10% 10%, #1b2333 0%, var(--bg) 55%);
  color: var(--text);
}
.shell { max-width: 1100px; margin: 24px auto 80px; padding: 0 16px; }
.eyebrow { font-family: 'Space Mono', monospace; color: var(--accent); letter-spacing: 2px; }
h1 { margin: 0 0 8px; font-size: 38px; }
.sub { color: var(--muted); margin-bottom: 24px; }
.card {
  background: linear-gradient(165deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 16px;
  margin: 14px 0;
}
.upload-row, .section-head { display: flex; justify-content: space-between; gap: 10px; align-items: center; }
button {
  border: none;
  background: var(--accent);
  color: #081018;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
}
input, select { padding: 8px; border-radius: 8px; border: 1px solid #314055; background: #0f1520; color: #fff; }
#preview { margin-top: 12px; max-width: 100%; border-radius: 12px; border: 1px solid #2c3444; }
.status { color: var(--muted); }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; min-width: 860px; }
th, td { border-bottom: 1px solid rgba(255,255,255,0.08); padding: 8px; text-align: left; }
.row-del { background: var(--danger); color: #fff; }
.result {
  background: #0b0f18;
  border: 1px solid #2b3344;
  border-radius: 12px;
  padding: 14px;
  min-height: 120px;
  white-space: pre-wrap;
}