:root {
  --bg: #0f1420;
  --panel: #171d2b;
  --border: #2a3245;
  --text: #e8ecf4;
  --text-muted: #8b93a7;
  --accent: #f2b705;
}

* { box-sizing: border-box; }

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

header {
  padding: 32px 20px 16px;
  text-align: center;
}

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

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px 60px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}

@media (max-width: 760px) {
  main { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-top: 20px;
}

.panel label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.row-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.row-list-head label { margin-bottom: 0; }

.link-btn {
  width: auto;
  margin: 0;
  background: none;
  color: var(--accent);
  padding: 4px 0;
  font-size: 13px;
  font-weight: 600;
}

.row-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 420px;
  overflow-y: auto;
}

.label-row {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #0c101a;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
}

.move-btns {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.move-btn {
  width: 24px;
  margin: 0;
  background: #1c2333;
  color: var(--text-muted);
  padding: 2px;
  font-size: 10px;
  border-radius: 4px;
}
.move-btn:disabled { opacity: 0.25; }

.label-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 6px;
  font-size: 14px;
}
.label-input:focus { outline: none; }

.del-btn {
  width: 28px;
  margin: 0;
  background: none;
  color: var(--text-muted);
  padding: 4px;
  font-size: 14px;
  border-radius: 6px;
}
.del-btn:hover { color: #ff6b6b; }

.add-row-btn {
  margin-top: 10px;
  background: #1c2333;
  color: var(--text);
  border: 1px dashed var(--border);
  font-weight: 600;
}

.bulk-input {
  width: 100%;
  background: #0c101a;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px;
  font-size: 14px;
  resize: vertical;
  margin-top: 12px;
}

.bulk-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}
.bulk-actions button { margin-top: 0; }

.secondary-btn {
  background: #1c2333;
  color: var(--text);
}

.hidden { display: none !important; }

.controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.field label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }

.field input {
  width: 100%;
  background: #0c101a;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
}

button {
  margin-top: 20px;
  width: 100%;
  background: var(--accent);
  color: #1a1500;
  border: none;
  border-radius: 8px;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

button:disabled { opacity: 0.6; cursor: default; }

.error {
  color: #ff6b6b;
  margin-top: 10px;
  font-size: 14px;
  display: none;
}

.hint {
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.hint h2 { color: var(--text); font-size: 16px; }

.preview-col { min-width: 0; }

.preview-sticky {
  position: sticky;
  top: 20px;
  margin-top: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.preview-title {
  font-weight: 700;
  margin-bottom: 12px;
}

.preview-sheet {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  background: #ffffff;
  border-radius: 6px;
  padding: 10px;
  min-height: 120px;
}

.preview-box {
  width: var(--box-w, 60px);
  height: var(--box-h, 30px);
  border: 1px solid #333;
  color: #111;
  display: flex;
  align-items: center;
  padding: 0 4px;
  font-size: var(--box-font, 9px);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.preview-empty {
  color: #999;
  font-size: 13px;
  padding: 20px;
  width: 100%;
  text-align: center;
}

.preview-note {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 8px;
}

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  padding: 20px;
}