:root {
  --bg: #f4f5f7;
  --card: #fff;
  --line: #d9dde3;
  --accent: #2563eb;
  --text: #1f2733;
  --muted: #6b7280;
  --ok-bg: #e7f6ec; --ok-fg: #1a7f37;
  --warn-bg: #fdeccd; --warn-fg: #9a6700;
  --err: #b42318;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text);
}
body.centered { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--card); padding: 12px 20px; border-bottom: 1px solid var(--line);
}
main { max-width: 1000px; margin: 24px auto; padding: 0 16px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px; margin-bottom: 20px;
}
.card.login { width: 340px; }
h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 18px 0 8px; }
label { display: flex; flex-direction: column; font-size: 13px; color: var(--muted); gap: 4px; }
input, select, textarea, button { font: inherit; }
input, select, textarea {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; color: var(--text); background: #fff;
}
textarea { min-height: 38px; resize: vertical; }
button {
  background: var(--accent); color: #fff; border: none; border-radius: 6px;
  padding: 10px 16px; cursor: pointer; margin-top: 8px;
}
button:hover { filter: brightness(1.05); }
button.link { background: none; color: var(--accent); padding: 2px 6px; margin: 0; }
.login label { margin-bottom: 12px; color: var(--text); }
.dropzone {
  border: 2px dashed var(--line); border-radius: 10px; padding: 36px; text-align: center;
  color: var(--muted); cursor: pointer; transition: .15s;
}
.dropzone.drag { border-color: var(--accent); background: #eef3ff; color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 8px; }
.table-wrap { overflow: auto; max-height: 62vh; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.resizable { table-layout: fixed; }
th, td { border: 1px solid var(--line); padding: 4px; text-align: left; vertical-align: top; overflow: hidden; }
thead th { background: #f0f2f5; position: sticky; top: 0; z-index: 2; }
tbody tr:nth-child(even) { background: #fafbfc; }
tbody tr:hover { background: #eef3ff; }
td input, td textarea, td select { width: 100%; border: none; padding: 4px; background: transparent; }
td input:focus, td textarea:focus, td select:focus { outline: 2px solid var(--accent); border-radius: 4px; background: #fff; }
td input[type=number] { text-align: right; font-variant-numeric: tabular-nums; }
td.vk { text-align: right; font-variant-numeric: tabular-nums; padding-right: 8px; color: var(--muted); background: #f7f9fc; }
.col-resizer { position: absolute; top: 0; right: 0; width: 7px; height: 100%; cursor: col-resize; user-select: none; }
.col-resizer:hover { background: var(--accent); opacity: .45; }
body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-select: none !important; }
.table-actions { display: flex; align-items: center; gap: 16px; margin: 10px 0 4px; flex-wrap: wrap; }
button.secondary { background: #eef1f6; color: var(--accent); border: 1px solid var(--line); margin: 0; padding: 6px 12px; }
button.secondary:hover { filter: none; background: #e3e8f0; }
.checkbox { flex-direction: row; align-items: center; gap: 8px; color: var(--text); margin: 12px 0; }
.checkbox input { width: auto; }
details.ref { margin-bottom: 14px; }
details.ref summary { color: var(--muted); font-size: 13px; }
td select { width: 100%; border: none; padding: 4px; background: #fff; }
td select.invalid { background: #fdecec; color: var(--err); }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--err); font-size: 13px; }
.note { padding: 10px 12px; border-radius: 6px; margin-bottom: 12px; font-size: 14px; }
.note.ok { background: var(--ok-bg); color: var(--ok-fg); }
.btn-link { display: inline-block; margin-top: 10px; background: var(--accent); color: #fff;
  text-decoration: none; padding: 8px 14px; border-radius: 6px; font-size: 14px; }
.btn-link:hover { filter: brightness(1.05); }
.note.warn { background: var(--warn-bg); color: var(--warn-fg); }
pre { background: #0f172a; color: #e2e8f0; padding: 12px; border-radius: 6px; overflow-x: auto; font-size: 12px; }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--accent); }