* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  margin: 0; padding: 0; background: #f5f6f8;
}
.app { display: flex; gap: 16px; padding: 16px; align-items: flex-start; }
.column {
  background: #fff; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  width: 320px; display: flex; flex-direction: column; max-height: calc(100vh - 32px);
}
.column-header {
  padding: 14px 16px 10px; font-weight: 700; font-size: 16px; color: #1f2937;
  border-bottom: 1px solid #f0f0f0; display: flex; align-items: center; justify-content: space-between;
}
.column-header .count { font-weight: 500; color: #6b7280; font-size: 13px; }
.task-list { padding: 10px; overflow-y: auto; flex: 1; min-height: 120px; }
.task {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 10px; padding: 12px 14px;
  margin-bottom: 10px; cursor: grab; display: flex; align-items: center; gap: 10px;
  transition: box-shadow .15s ease, transform .1s ease; user-select: none;
}
.task:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.task.dragging { opacity: .6; transform: scale(1.01); }
.task .handle { color: #9ca3af; cursor: grab; font-size: 16px; line-height: 1; }
.task .title { flex: 1; font-size: 14px; color: #111827; }
.task .badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: #f3f4f6; color: #4b5563; }
.add-btn {
  margin: 0 10px 10px; padding: 8px 10px; border-radius: 8px; border: 1px dashed #d1d5db;
  background: #f9fafb; color: #374151; font-size: 13px; cursor: pointer; text-align: left;
}
.add-btn:hover { background: #f3f4f6; }
.controls { padding: 10px 16px; display: flex; gap: 8px; border-top: 1px solid #f0f0f0; }
.btn {
  padding: 8px 12px; border-radius: 8px; border: 1px solid #e5e7eb; background: #fff;
  color: #374151; font-size: 13px; cursor: pointer;
}
.btn.primary { background: #2563eb; color: #fff; border-color: #2563eb; }
.btn:hover { background: #f3f4f6; }
.btn.primary:hover { background: #1d4ed8; }
.empty { color: #9ca3af; font-size: 13px; text-align: center; padding: 20px 0; }